KR102625600B1 - Ballon cathether for medical treatment - Google Patents

Abstract

The balloon catheter for medical treatment of the present invention includes: a hollow catheter tube in which an air passage is formed along the wall of the hollow tube, and an air inlet and an air outlet are formed that communicate with the air passage and open to the outside of the wall; An air injection member coupled to one end of the hollow catheter tube and injecting air into the air inlet and air passage; And a balloon member surrounding the outer circumference of the other end of the hollow catheter tube where the air outlet is formed, coupled to the hollow catheter tube, and inflated by air discharged from the air outlet, wherein the balloon member has a bottom portion. It is a cylindrical part, and a coupling protrusion is protrudingly formed on the inner surface of the bottom, and a gap is formed between the cylindrical part and the coupling protrusion, and the hollow catheter tube is inserted into the gap so that the other end of the hollow catheter tube is inserted into the gap. When the catheter tube is inserted and coupled to the cylindrical part of the balloon member, the engaging protrusion is fitted and coupled to the hollow of the hollow catheter tube, and the bottom of the balloon member and the cylindrical portion extending from the bottom are inserted into the hollow. It is characterized by sealing and covering the other end of the type catheter tube.

Description

Balloon catheter for medical treatment {BALLON CATHETHER FOR MEDICAL TREATMENT}

The present invention relates to balloon catheters for medical treatment.

More specifically, it relates to a balloon catheter for medical treatment that is inserted into a person's genitals and fixes the tissue to be treated during medical treatment such as radiation treatment for prostate cancer or uterine cancer.

A balloon catheter equipped with a balloon member at the end is used to fix the tissue in or around the prostate during male diseases such as prostatitis, prostatic hypertrophy, and prostate cancer. Additionally, in medical treatment such as radiation therapy for female diseases such as uterine cancer, a balloon catheter is used to insert through the female genital tract and fix the tissue to be treated.

For example, during radiation treatment for prostate cancer or uterine cancer, if radiation is applied to healthy tissue around the tumor, the area may be exposed to radiation and cause very serious side effects. Therefore, it is necessary to accurately inject radiation into the tissue containing the tumor to be treated and protect other tissues from radiation exposure. In addition, even when performing medical treatments or treatments other than radiation therapy, balloon catheters are used to directly fix the tissue to be treated or to indirectly fix the tissue to be treated by fixing the surroundings of the tissue to be treated. The balloon catheter has a balloon member at one end of the catheter that is inflated by air injection, and when the catheter inserted into the genitals such as the urethra approaches the tissue to be treated, the balloon member is inflated to balloon the tissue to be treated or the tissue adjacent to it. It can be fixed by pressing it with pressure. Accordingly, medical staff can perform radiation treatment, for example, on tissue where a tumor exists.

Figure 1 is a schematic perspective view showing a conventional balloon catheter for medical treatment (1) proposed by the present applicant, and Figure 2 is an example showing the expansion of the balloon member 30 of the balloon catheter for medical treatment (1) of Figure 1. , FIG. 3 is another example showing the expansion of the balloon member 30 of the balloon catheter 1 for medical treatment in FIG. 1.

As shown, the balloon catheter 1 proposed by the present applicant is coupled to a hollow catheter tube 10 with an air passage 12 formed along the wall of the hollow tube and one end of the catheter tube 10. It is provided with an air injection member 20 and a balloon member 30 that surrounds and couples to the outer periphery of the other end of the hollow catheter tube 10 (see FIG. 1(a)). For convenience of illustration, a hollow catheter is provided. Although the length of the tube 10 is shown to be short, the actual length of the catheter tube 10 may be longer so that it can be inserted into the patient's genitals and access the tissue to be treated.

The hollow catheter tube 10 has an air passage 12 formed along the longitudinal direction of the tube wall around the hollow 11, and the air passage 12 is an air inlet that penetrates the catheter tube wall. (12b) and an air outlet (12c). Openings 12a and 12d are also formed at both ends of the air passage 12.

The air injection member 20 combines a tube coupling portion 21 coupled to one end of the hollow catheter tube 10 and a valve member integrally formed at a predetermined angle with the tube coupling portion 21. It is provided with unit 22. A predetermined valve member 23 is coupled to the valve member coupling portion 22. In addition, the valve member coupling portion 22 is equipped with an air injection pipe 22a for injecting air into the air inlet 12b of the air passage 12, and the air injection pipe 22a is provided through the valve member 23. ) - Air inlet (12b) - Air can be injected into the air passage (12). For convenience of illustration, in FIG. 1, the air injection member 20 is shown coupled to the hollow catheter tube 10.

At the other end of the hollow catheter tube 10, a balloon member 30 is coupled to surround the hollow catheter tube 10, and seals the other end of the hollow catheter tube and the opening of the balloon member 30. A stopper member 40 to be coupled is located.

The balloon member 30 is formed in a hollow cylindrical shape, and the other end of the hollow catheter tube 10 is inserted and coupled into the hollow cylindrical shape (see FIG. 1(b)). In order to ensure airtightness after the hollow catheter tube 10 is inserted into the balloon member 30, a predetermined length is provided between the inner peripheral surface of the upper and lower ends of the balloon member 30 and the outer peripheral surface of the hollow catheter tube 10. Apply adhesive (T) as much as necessary. When applying the adhesive (T), a position corresponding to the predetermined length from the top and bottom of the balloon member (30) is placed to prevent the adhesive (T) from penetrating between the inner peripheral surface of the balloon member (30) and the outer peripheral surface of the catheter tube (10) beyond a predetermined length. After inserting the O-rings 50 into each, adhesive T is injected between the upper and lower balloon members 30 and the catheter tube 10 using, for example, a syringe, and the upper and lower ends of the balloon member 30 are connected to the catheter tube 10. ) is tightly bonded to the outer circumferential surface of the After joining, the O-ring 50 is removed.

Thereafter, the protrusion 41 of the stopper member 40 is inserted into the hollow of the hollow catheter tube 10 and coupled thereto. The stopper member 40 has a hemispherical stopper body and a protrusion 41 protruding from the stopper main body, and when the protrusion 41 is inserted into the hollow and coupled, the stopper member 40 is connected to the balloon member. (30) and the other end of the hollow catheter tube (10) are covered and sealed. The bottom surface of the stopper body, the end surface of the catheter tube 10, the outer peripheral surface of the protrusion 41 of the stopper member, and the hollow inner peripheral surface are airtightly bonded with an adhesive T (see Figure 1(c)).

However, this conventional balloon catheter 1 had the following problems.

First, as shown in FIG. 2, in order to insert and airtightly couple the hollow catheter tube 10 to the balloon member 30, adhesive T is injected to a predetermined length at the upper and lower ends of the balloon member 30. Each task was required. The balloon member 30 between the upper and lower parts becomes the expanding balloon part B, and in order to prevent the adhesive T from being injected into this part, the balloon part boundary between the upper and lower parts is as described above. Each O-ring (50) was inserted and adhesive (T) was injected. However, this O-ring attachment and adhesive injection operation itself was cumbersome, causing an increase in man-hours and manufacturing costs. Additionally, there is a problem in that the adhesive application length differs from the predetermined length depending on the operator.

Second, after adhering the balloon member 30 and the hollow catheter tube 10, the protrusion 41 of the stopper member 40 was inserted into the other end of the balloon member 30 and the catheter tube 10 and sealed.

However, in this case, there was a risk of air leaking between the stopper member 40 and the balloon member 30. In order to prevent air leakage, even when adhesive is applied to the stopper member 40 and the like to adhere it to the balloon member 30, the stopper member 40 is a separate part from the balloon member 30, so there may be a difference between the parts due to repeated use. There was a risk of air leakage due to a gap occurring.

Third, since the stopper member 40 had to be manufactured by molding it as a separate part, the number of parts increased and the manufacturing cost increased.

Fourth, the stopper member 40 contains a radiopaque component such as barium sulfate, so that when the balloon catheter 1 is inserted into the prostate, etc. and observed through radiation, etc., the stopper member 40 is inserted into the catheter 1. ) is an indicator indicating the position of the end. However, as shown in FIG. 2, when the application length of the adhesive T at the lower end of the balloon member 30 is different depending on the operator, the size and expansion shape of the balloon part B also vary depending on the application length. In this way, if the quality of the balloon catheter 1 is different and the size or shape of the balloon portion B is different, the target tissue cannot be fixed uniformly with the balloon member 30, making it difficult to perform the medical procedure accurately. In addition, since the distance between the end of the stopper member 40 and the balloon portion B also varies depending on the catheter 1, there is a risk that positioning of the balloon catheter 1 may not be performed uniformly. In addition, depending on the pressure applied within the balloon, the balloon of the balloon member 30 is not inflated in a certain shape, such as being pressed against the end of the adhesive (T) application point and inflated to the right or conversely to the left as shown in FIG. Therefore, there are cases where it is difficult to fix the target tissue.

Republic of Korea Patent Publication No. 10-2014-0117872

The present invention was made to solve the above problems, and its purpose is to provide a balloon catheter for medical treatment that can reduce manufacturing man-hours and costs by simplifying the coupling structure of a hollow catheter tube and a balloon member.

In addition, the present invention effectively prevents air leakage and eliminates the adhesive application portion on the outer circumference of the other end of the hollow catheter tube and the inner circumferential surface of the balloon member, thereby uniformizing the inflation shape of the balloon member and reducing the gap between the end of the balloon member and the inflated balloon portion. The purpose is to provide a balloon catheter for medical treatment.

In order to solve the above problems, the balloon catheter for medical treatment of the present invention includes: a hollow catheter tube in which an air passage is formed along the wall of the hollow tube; An air injection member coupled to one end of the hollow catheter tube to inject air into the air passage; and a balloon member surrounding the outer periphery of the other end of the hollow catheter tube, coupled to the hollow catheter tube, and inflated by air injected through the air passage, wherein the balloon member is a cylindrical portion having a bottom. A coupling protrusion is protrudingly formed on the inner surface of the bottom, a gap is formed between the cylindrical part and the coupling protrusion, and the hollow catheter tube is inserted so that the other end of the hollow catheter tube is inserted into the gap. When inserted and coupled to the cylindrical portion of the balloon member, the engaging protrusion is fitted and coupled to the hollow of the hollow catheter tube, and the bottom of the balloon member and the cylindrical portion extending from the bottom are connected to the hollow catheter tube. The other end is sealed and covered.

As one example, the bottom portion of the balloon member seals the air passage opening to the other end of the hollow catheter tube.

As a specific example, the inner peripheral surface of the upper end of the cylindrical portion of the balloon member is adhered to the outer peripheral surface of the hollow catheter tube, and the inner peripheral surface of the bottom portion of the balloon member and the outer peripheral surface of the coupling protrusion are the end surface of the other end of the hollow catheter tube and the Each may be adhered to the hollow inner peripheral surface of the hollow catheter tube.

As one example, at least one of the bottom of the balloon member and the coupling protrusion may include a radiopaque component.

As a more specific example, the inner circumference forming the hollow of the hollow catheter tube is disposed eccentrically with respect to the outer circumference of the catheter tube, so that the tube wall thickness of the catheter tube changes along the circumference of the inner circumference, The air passage is formed along the thick tube wall at the part where the distance between the inner circumference and the outer circumference is furthest, and the coupling protrusion is formed eccentrically on the inner surface of the bottom of the balloon member to correspond to the position of the eccentric inner circumference. Thus, the coupling protrusion can be fitted and coupled to the hollow of the eccentric inner circumference.

As another example, the inner circumference forming the hollow of the hollow catheter tube is arranged concentrically with respect to the outer circumference of the tube, and a protrusion protruding radially inward is formed on a portion of the inner circumference, and the air passage is It is formed on the protrusion, and the coupling protrusion has an insertion groove into which the protrusion is inserted is formed on one side. As the protrusion is inserted into the insertion groove, the coupling protrusion can be fitted and coupled to the hollow of the inner circumference of the catheter tube. .

As one example, the thickness of the engaging protrusion may gradually increase toward the bottom, and the gap between the cylindrical portion and the engaging protrusion may gradually decrease toward the bottom.

As another example, the inner peripheral surface of the tubular portion is formed to draw a convex curved line outward from both ends in the longitudinal direction toward the middle portion in the longitudinal direction, so that the thickness of the tubular portion gradually increases from both longitudinal ends of the tubular portion toward the middle portion in the longitudinal direction. It may be thinning.

The outer surface of the bottom of the balloon member of the medical treatment balloon catheter may be formed as a hemispherical protrusion.

As another example, an outer cylindrical portion may be formed extending from the outer surface of the bottom portion, and a labeling member containing a radiopaque component may be coupled to the outer cylindrical portion.

The upper surface of the cover member opposite to the outer cylindrical part engaging surface may be formed as a flat surface or a hemispherical protrusion.

According to the present invention, the balloon member of the catheter that fixes the target tissue is composed of a cylindrical portion having a bottom, and the other end of the hollow catheter tube is sealed and covered with the bottom and the cylindrical portion to eliminate the risk of air leakage. did.

Additionally, by proposing a balloon member having a bottom, it is possible to manufacture a catheter without a stopper member, thereby reducing the number of parts and greatly simplifying the manufacturing process.

In addition, by allowing the balloon member to be coupled to the hollow catheter tube by combining the coupling protrusion of the balloon member and the hollow catheter tube without applying adhesive to the outer circumference of the other end of the hollow catheter tube, there is a difference in the adhesive application length as in the past. The problem of non-uniform expansion of the balloon portion was eliminated.

Accordingly, according to the balloon catheter for medical treatment of the present invention, it is possible to uniformly inflate the balloon portion and more accurately determine the position of the end of the catheter, thereby further improving the accuracy of medical procedures.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the detailed description below.

Figure 1 is a schematic perspective view showing a conventional balloon catheter for medical treatment proposed by the present applicant.
FIG. 2 is an example showing the expansion of the balloon member of the medical treatment balloon catheter of FIG. 1.
Figure 3 is another example showing the expansion of the balloon member of the medical treatment balloon catheter of Figure 1.
Figure 4 is an exploded perspective view of the main portion of a balloon catheter for medical treatment according to an embodiment of the present invention.
Figure 5 is a combined perspective view of a balloon catheter for medical treatment according to an embodiment of the present invention.
Figure 6 is a schematic side view showing an expanded state of a balloon member according to an embodiment of the present invention.
FIG. 7 is a side cross-sectional view of the balloon catheter for medical treatment taken along lines A-A', B-B', and C-C' of FIG. 6.
Figure 8 is an exploded perspective view and a combined perspective view of the main portion of a balloon catheter for medical treatment according to another embodiment of the present invention.
Figure 9 is an exploded perspective view and a combined perspective view showing the main part of the balloon catheter for medical treatment of the embodiment of Figure 8 divided in half.
Figure 10 is a schematic side view showing the expanded state of the balloon member according to the embodiment of Figure 8.
FIG. 11 is a side cross-sectional view of a balloon catheter for medical treatment taken along lines D-D', E-E', and F-F' of FIG. 6.
Figure 12 is a side cross-sectional view showing an example of a balloon member and a label member according to another embodiment of the present invention.
Figure 13 is a side cross-sectional view showing an example of a balloon member and a label member according to a modification of Figure 12 of the present invention.
FIG. 14 is a schematic side view showing the expanded state of the balloon member according to the modified example of FIG. 13.

The embodiments described below are shown as examples to aid understanding of the present invention, and the attached drawings are not drawn to scale to aid understanding of the invention, and the dimensions of some components may be exaggerated. .

Since the present invention can be subject to various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

The balloon catheter for medical treatment of the present invention is for fixing the tissue to be treated in a patient, and the balloon member coupled to the hollow catheter tube is composed of a cylindrical portion having a bottom, and the hollow catheter is placed on the inner surface of the bottom. By forming a coupling protrusion coupled to the catheter tube, the other end of the hollow catheter tube can be completely sealed only by fitting the balloon member and the hollow catheter tube to each other.

As a result, the process of combining the balloon member and the hollow catheter tube is greatly simplified, and the inflation shape of the balloon portion of the balloon member can be made uniform, thereby reducing assembly man-hours and manufacturing costs, and improving the accuracy of the doctor's procedure. there is.

Hereinafter, specific embodiments of the balloon catheter for medical treatment of the present invention will be described in detail with reference to the attached drawings.

(First Embodiment)

Figure 4 is an exploded perspective view of the main part of a balloon catheter for medical treatment according to an embodiment of the present invention, Figure 5 is a combined perspective view of a balloon catheter for medical treatment according to an embodiment of the present invention, and Figure 6 is a perspective view of the balloon catheter for medical treatment according to an embodiment of the present invention. It is a schematic side view showing the expansion of the balloon member, and FIG. 7 is a side cross-sectional view of the balloon catheter for medical treatment along lines A-A', B-B', and C-C' of FIG. 6.

The balloon catheter 1000 for medical treatment of this embodiment includes a hollow catheter tube 100 in which an air passage 120 is formed along the wall of the hollow tube; An air injection member (200) coupled to one end of the hollow catheter tube (100) and injecting air into the air passage (120); And a balloon member 300 that surrounds the outer periphery of the other end of the hollow catheter tube 100, is coupled to the hollow catheter tube 100, and expands with air injected through the air passage 120. do.

The hollow catheter tube 100 has a hollow passage 110 into which the guide rod (R) is inserted and an air passage 120 formed through the tube wall around the hollow. An opening 111 through which the guide rod (R) can be inserted is formed at one end of the hollow passage 110, and an opening 112 is formed at the other end. The air passage 120 is formed along the wall of the hollow catheter tube 100 and is open at both ends. Among the openings 121 and 124, the opening 121 on the side where the guide rod R is inserted is sealed with an adhesive. The air passage 120 is formed along the longitudinal direction of the hollow catheter tube 100. An air inlet 122 and an air outlet 123 that communicate with the air passage 120 and penetrate the catheter tube wall and open to the outside of the tube wall will be formed on one end and the other end of the catheter tube 100. You can. Although the length of the hollow catheter tube 100 is shortened for convenience of illustration, the actual length of the catheter tube 100 can be made longer to allow access to the tissue to be treated when inserted into the patient's genitals. there is. The hollow catheter tube 100 is made of a soft material that has flexibility and can be bent. Therefore, when inserting the balloon catheter 1000 into the human genital organ, the guide rod (R) is inserted into the hollow portion (hollow passage 110) of the hollow catheter tube 100 and the guide rod (R) is The balloon catheter 1000 can be advanced to the tissue to be treated by holding and pushing the catheter tube 100 (see Figure 5).

The present invention also includes an air injection member 200 that is coupled to one end of the hollow catheter tube 10 and injects air into the air inlet 122 and the air passage 120.

The air injection member 200 combines a tube coupling portion 210 coupled to one end of the hollow catheter tube 100 and a valve member integrally formed at a predetermined angle with the tube coupling portion 210. A unit 220 may be provided. The tube coupling portion 210 is formed in a hollow cylindrical shape, and one end of the hollow catheter tube 100 where the air inlet 122 is formed is concentrically fitted and coupled to the tube coupling portion 210. Since the air injection member 200 is formed integrally with the valve member coupling portion 220 and the tube coupling portion 210 to which the valve member 230 is coupled, the tube coupling portion 210 and the valve member coupling portion ( 420), there is no need for a separate joining or fastening process. For this reason, the air injection member 200 can be assembled by simply coupling the hollow catheter tube 100 to the tube coupling portion 210 of the air injection member 200 and coupling the valve member 230 to the valve member coupling portion 220. ) can be completed at once. However, as will be described later, the present invention is characterized by the configuration of the balloon member 300, and does not specifically limit the configuration of the air injection member 200. That is, if it is a member that can efficiently inject air into the air inlet 122 of the hollow catheter tube 100, the tube coupling portion 210 and the valve member coupling portion 220 are configured separately and coupled to each other. Even if it is configured, it is applicable to the present invention.

In this embodiment, the air injection member 200 is provided with a communication path inside the air injection member 200 that communicates the tube coupling portion 210 and the valve member coupling portion 220. Therefore, the balloon catheter 1000 of this embodiment can reduce the risk of air leaking to the outside during the process of moving air from the valve member 230 to the balloon member 300. Additionally, as described above, the tube coupling portion 210, the valve member coupling portion 220, and the communication passage (air injection pipe 221) are all formed integrally with the air injection member 200. Therefore, for example, the catheter tube 100 is connected to the tube coupling portion 210 of the air injection member 200 so that the air inlet 122 side of the air passage 120 of the catheter tube 100 is connected to the communication passage. By simply coupling the valve member 230 to the valve member coupling portion 220 of the air injection member 200, the coupling operation can be simplified and air leakage can be prevented at the same time.

Meanwhile, the valve member coupling portion 220 may be formed to be inclined at a predetermined angle with respect to the tube coupling portion 210, as shown in FIG. 4 . Accordingly, the valve member 230 coupled to the valve member coupling portion 220 and the air injection pipe 221 formed in the valve member coupling portion 220 are connected to the air passage 120 of the hollow catheter tube 100. It is disposed inclined at a predetermined angle toward the air inlet 122. Therefore, when air is injected downward through the valve member 230 with the air inlet 122 facing down (i.e., when air is injected by positioning the valve member 230 side upward in FIG. 4), air is injected more quickly. It can be injected downward through the air inlet 122, and air can be prevented from flowing back toward the valve member 230. That is, the backflow prevention function of the check valve itself provided in the valve member 230 and the configuration of the valve member coupling portion 220 tilted at a predetermined angle can further strengthen the air backflow prevention function. For reference, the valve member 230 is provided with a check valve (not shown) that allows air to flow only toward the balloon member 300 of the balloon catheter 1000 and blocks the flow in the opposite direction. Air may be injected into one end of the valve member 230 using an air injection device (eg, syringe S), as shown in FIG. 5 . Since the configuration of such a check valve and the valve body provided with the check valve is known, further detailed description will be omitted in this specification.

In order to airtightly couple the air injection member 200 and the hollow catheter tube 100, an adhesive is placed between the inner peripheral surface of the upper end of the tube coupling portion 210 of the air injection member 200 and the inner peripheral surface of the hollow catheter tube 100. Can be adhered by injecting with a syringe.

A balloon member 300 is provided at the other end of the catheter tube 100 where the air outlet 123 is formed. The balloon member 300 is made of a soft flexible member (eg, flexible silicone) and can expand when air is injected into the balloon member 300. The balloon member 300 surrounds the outer periphery of the other end of the catheter tube 100 and is coupled to the catheter tube 100, and is inflated by air discharged from the air outlet 123.

The balloon member 300 of the present invention is not in the form of a cylindrical tube with a hollow formed through it as in the prior art, but is composed of a cylindrical portion 310 having a bottom portion 320. That is, as shown in Figures 1 to 3, rather than a structure in which a hollow cylindrical tube is fitted and coupled to a hollow catheter tube and resealed with a stopper member, the hollow catheter is attached to the cylindrical part 310 having the bottom part 320. It is a structure in which the tube 100 is inserted and combined. According to the present invention, the cylindrical portion 310 of the balloon member 300 and the bottom portion 320 extending therefrom completely seal and cover the other end of the catheter tube 100. Therefore, there is no need to re-seal with a stopper member, so there is no need to manufacture a separate stopper member. Accordingly, the number of parts is reduced and the assembly process for the parts can be omitted. Additionally, since the cylindrical portion 310 and the bottom portion 320 completely seal the other end of the catheter tube 100, there is no possibility of air leaking between the stopper member and the balloon member as in the prior art.

In addition, the balloon member 300 of the present invention is provided with a coupling protrusion 330 on the inner surface of the bottom 320 of the cylindrical portion 310 in order to strengthen the coupling with the hollow catheter tube 100. . Since the coupling protrusion 330 is fitted and coupled to the hollow 112 of the hollow catheter tube 100, the balloon member 300 is more firmly coupled to the hollow catheter tube 100. It is preferable that the coupling protrusion 330 has an outer circumferential shape corresponding to the inner circumferential shape of the hollow 112 of the hollow catheter tube 100 so that the coupling protrusion 330 can be airtightly coupled to the hollow 112. .

Additionally, a gap is formed between the cylindrical portion 310 and the coupling protrusion 330, that is, around the coupling protrusion. The other end of the hollow catheter tube 100 is inserted through this gap. That is, as shown in FIG. 5, the other end of the hollow catheter tube 100 is inserted into the gap and the hollow catheter tube 100 is inserted and coupled to the cylindrical portion 310 of the balloon member 300. At the same time, the coupling protrusion 330 of the balloon member bottom 320 is fitted and coupled to the hollow 112 of the hollow catheter tube 100, thereby forming the balloon member 300 and the hollow catheter tube 100. ) can be reliably combined. When the other end of the hollow catheter tube 100 is coupled in close contact with the inner surface 321 of the bottom 320 of the balloon member, the bottom 320 and the cylindrical shape extending from the bottom are formed. Since the portion 310 completely seals and covers the hollow catheter tube 100, it is possible to reliably prevent air from leaking through the other end of the catheter tube 100.

And, when the end surface 101 of the other end of the hollow catheter tube 100 is coupled so as to be in close contact with the bottom 320 of the balloon member, the air passage 120 opening to the other end also Since the inner surface 321 of the bottom 320 is sealed, the opening 124 of the air passage is also sealed.

Meanwhile, the inner peripheral surface of the upper end of the balloon member on the opposite side to the other end of the hollow catheter tube 100 is also airtightly adhered to the outer peripheral surface of the hollow catheter tube 100. That is, after inserting the other end of the hollow catheter tube 100 into the cylindrical portion 310 of the balloon member 300, the O-ring 400 of FIG. 4 is inserted into a predetermined position at the upper end of the balloon member 300. The upper end of the balloon member 300 and the hollow catheter tube 100 can be bonded to each other by injecting adhesive T between the upper inner peripheral surface of the balloon member 300 and the inner peripheral surface of the hollow catheter tube 100 using, for example, a syringe. After adhesion, the O-ring 400 is removed.

Therefore, according to this embodiment, both the upper end and the lower end (bottom part 320) of the balloon member 300 are airtightly coupled to the hollow catheter tube 100, so that the hollow catheter tube 100 The air injected into the air passage 120 is discharged to the cylindrical portion 310 between the upper and lower ends of the balloon member 30 through the air outlet 123, thereby expanding the cylindrical portion of this portion. That is, the cylindrical portion 310 between the upper and lower ends of the balloon member 30 becomes the balloon portion B.

The location and shape of the coupling protrusion 330 may vary depending on the hollow shape of the hollow catheter tube 100 or the location of the air passage 120.

This embodiment assumes a case where the hollow 112 of the hollow catheter tube 100 is eccentrically disposed.

That is, as shown in FIGS. 4 to 7, the inner circumference C1 forming the hollow 112 of the hollow catheter tube 100 is eccentric with respect to the outer circumference C2 of the catheter tube 100. It is placed. The reason for this eccentric arrangement is to secure space for forming the air passage 120 on the wall of the catheter tube 100. Since the inner circumferential circle (C1) is disposed eccentrically with respect to the outer circumferential circle (C2), the wall thickness of the catheter tube 100 changes along the circumference of the inner circumferential circle (C1). The air passage 120 is formed in the tube wall 101 at the part where the distance between the inner circle C1 and the outer circle is the farthest, that is, at the part where the wall thickness is thickest along the circumference of the inner circle C1.

Accordingly, the coupling protrusion 330 formed on the bottom 320 of the balloon member 300 also corresponds to the position of the eccentric inner circumference C1 of the catheter tube 100. It is formed eccentrically on the inner surface 321. That is, since the inner circumferential circle C1 forming the hollow of the catheter tube 100 and the coupling protrusion 330 of the balloon member 300 are positioned in alignment, the coupling protrusion 330 is connected to the hollow 112. ) can be airtightly joined.

Referring to FIGS. 4 and 6, the adhesion process of the balloon member 300 and the hollow catheter tube 100 will be described. As described above, before inserting the hollow catheter tube 100 into the cylindrical portion 310 of the balloon member 300, the bottom inner surface 321 and the coupling protrusion 330 of the balloon member 300 ), or the end surface 101 of the other end of the hollow catheter tube 100 and the inner peripheral surface of the hollow 112 that will be in contact with it, (T) is applied. The adhesive (T) is applied only to the bottom 320 and the coupling protrusion 330 of the balloon member 300 to be coupled, or to the end surface 101 of the hollow catheter tube 100 in contact with the bottom 320. It is also possible to apply only to the inner peripheral surface of the hollow 112 in contact with the coupling protrusion, or to both sides of the balloon member 300 and the hollow catheter tube 100. However, considering the ease of assembly and adhesion work, adhesive is applied to the inner peripheral surface of the hollow 112 of the hollow catheter tube 100 into which the coupling protrusion 330 is inserted and the end surface 101 of the other end of the catheter tube 100. It is convenient to apply (T) and assemble it by inserting the balloon member 300 thereon. The portion indicated by a thick line in FIG. 6 is the adhesive application portion (T). As shown in FIG. 6, the hollow catheter tube 100 is fitted and coupled to the gap between the cylindrical portion 310 and the coupling protrusion 330 of the balloon member 300, and at the same time, the balloon member 300 When the coupling protrusion 330 is inserted and coupled to the hollow 112 of the hollow catheter tube, the inner surface 321 of the bottom of the balloon member 300 and the outer peripheral surface of the coupling protrusion 330 are formed by the adhesive T. The end surface 101 of the other end of the hollow catheter tube 100 and the inner peripheral surface of the hollow 112 of the hollow catheter tube are each firmly adhered to each other by an adhesive T.

Thereafter, the adhesive T is applied to a predetermined length by injecting the adhesive between the inner peripheral surface of the upper end of the cylindrical portion 310 of the balloon member 300 and the outer peripheral surface of the hollow catheter tube 100 using, for example, a syringe. By this, the upper end and the bottom of the balloon member 300 are airtightly coupled to the hollow catheter tube 100, and the balloon member (balloon part B) between the upper end and the bottom is expanded by air injection. .

At least one of the bottom portion 320 and the coupling protrusion portion 330 of the balloon member 300 includes a radiopaque component. When inserting the balloon catheter 1000 for medical treatment into the prostate, etc., the bottom 320 or A radiopaque component may be included in the coupling protrusion 330 or both connected thereto. Such radiopaque components may include, for example, barium (barium sulfate), iodine, tungsten, or a resin containing one or more of these. In Figures 4 and 5, the coupling protrusion 330 is displayed in dark color because the coupling protrusion 330 contains a radio-opaque component.

5 and 6, the expansion process of the balloon member of the present invention will be described.

The balloon members 300 of FIG. 6 are formed as a cylindrical portion 310 having a bottom 320, and a coupling protrusion 330 is formed on the bottom 320.

The outer surface 322 of the bottom portion 320 of the balloon member in FIGS. 5 and 6(a) is formed as a flat surface. However, as shown in FIG. 6(b), the outer surface 322 of the bottom of the balloon member may be formed as a hemispherical protrusion. In this way, when the bottom part of the balloon member 320 is composed of the hemispherical protrusion 322, when the outer surface 322 of the bottom part of the balloon member is inserted into the hollow catheter tube 100, the outer surface 322 is pressed. This makes it easy to combine. In addition, the end surface of the balloon catheter 1000 for medical treatment is rounded and smooth due to the hemispherical protrusion, thereby preventing damage to internal tissues when inserted into the human body. Of course, even when the bottom portion 320 of the balloon member is formed as a flat surface as shown in FIG. 6(a), damage to the internal tissue can be prevented by making the balloon member a soft material such as silicon. The bottom portion 320 of the balloon member, together with the coupling protrusion 330, functions to mark the end position of the balloon catheter 1000 for medical treatment. Therefore, for the labeling function, it is necessary to include the radiopaque component in the required amount and at the required thickness.

As shown in Figure 5, a balloon catheter 1000 for medical treatment is inserted into the patient's body, such as the prostate, and a guide rod (R) is inserted into the hollow passage 110 of the catheter 1000 and advanced to the tissue to be treated. When approaching the tissue to be treated, air is injected into the air injection member 200 using a syringe (S), etc., and the injected air flows through the air injection pipe 221, the air inlet 122, and the air passage 120. It is transferred to the air outlet 123 at the other end of the hollow catheter tube 100. Since the opening 124 at the end of the air passage 120 is sealed by the bottom 320 of the balloon member 300, the air injected into the air passage 120 is discharged only through the air outlet 123. . At this time, the top and bottom portions 320 of the balloon member 300 are sealed and coupled to the hollow catheter tube 300, so the cylindrical portion between the top and bottom portions 320 of the balloon member 300 ((310): balloon part (B)) expands as shown in FIG. 6. In the case of the present invention, the outer circumferential surface of the other end of the hollow catheter tube 100, which is in contact with the inner circumferential surface of the cylindrical portion 310 of the balloon member 300, is not bonded with adhesive, and therefore the balloon portion B is as shown in the drawing. It expands and expands to the end portion adjacent to the bottom portion 320 of the balloon member. That is, the bottom 320 and the engaging protrusion 330 of the balloon member 300 are tightly coupled to the end surface 101 of the other end of the hollow catheter tube 100 and the inner peripheral surface of the hollow 112 and are tightly coupled with an adhesive (T ) to reliably maintain airtightness, there is no need to apply adhesive between the outer peripheral surface of the other end of the hollow catheter tube and the inner peripheral surface of the cylindrical portion of the balloon member as in the past. Accordingly, by installing an O-ring in this part, the task of applying adhesive with a syringe can be omitted. In addition, since the balloon part (B) is expanded as described above, problems such as the balloon part (B) being pressed against the adhesive application point and expanding unevenly, as in the past, can be prevented. Therefore, in the case of the present invention, the balloon portion (B) of the balloon member can be uniformly inflated as shown in the lower drawings of FIGS. 6(a) and 6(b). In addition, as the length of the balloon part (B) increases, the distance between the end of the balloon part (B) and the bottom part 320 of the balloon member, that is, the end of the medical treatment balloon catheter 1000, also becomes uniformly shorter. , no matter which worker performs the assembly work, uneven expansion according to the adhesive application length can be prevented as in the past.

FIG. 7 is a side cross-sectional view of a balloon catheter for medical treatment along lines A-A', B-B', and C-C' of FIG. 6. The hollow catheter tube 100 and The coupled state of the balloon member 300 can be easily determined. Specifically, the coupling protrusion 330 of the balloon member 300 is inserted into the hollow 112 of the hollow catheter tube 100, and the bottom 320 of the balloon member 300 is inserted into the hollow catheter tube 100. The process of covering and sealing the opening 124 of the end surface 101 can be well understood. In addition, the inner circumference (C1) and the outer circumference (C2) of the hollow catheter tube 100 are formed eccentrically, and the coupling protrusion 330 of the balloon member 300 is eccentrically disposed on the bottom 320. It shows up well.

(Second Embodiment)

Figure 8 is an exploded perspective view and a combined perspective view of the main part of the balloon catheter for medical treatment according to another embodiment of the present invention, and Figure 9 is an exploded perspective view and a combined perspective view showing the main part of the balloon catheter for medical treatment according to the embodiment of Figure 8 divided in half. 10 is a schematic side view showing the expansion of the balloon member according to the embodiment of FIG. 8, and FIG. 11 is a side view of the balloon catheter for medical treatment along lines D-D', E-E', and F-F' of FIG. 6. This is a cross-sectional view.

The balloon catheter 1000' for medical treatment of the second embodiment also includes a hollow catheter tube 100, an air injection member 200, and a balloon member 300', as in the first embodiment. Since the configuration of the coupling relationship between the hollow catheter tube and the air injection member is the same as that of the first embodiment, the description thereof is omitted.

The present embodiment is different from the first embodiment in the hollow shape of the hollow catheter tube and the configuration of the air passage, and the configuration of the engaging protrusion of the corresponding balloon member.

The air passage 120 of the hollow catheter tube 100 is formed in a thick tube wall portion formed by eccentricizing the inner circumferential circle C1, which forms a hollow, with respect to the outer circumferential circle C2, as shown in FIGS. 6 and 7. There is a way. This method has the advantage of being convenient for forming, but since the thickness of the tube wall varies along the circumference of the inner circle (C1), the rigidity of the thin wall thickness portion becomes weak and there is a limit to increasing the diameter of the air passage 120. .

Therefore, in the embodiment of FIG. 8, the inner circumference (C1') forming the hollow of the hollow catheter tube 100 was arranged concentrically with respect to the outer circumference of the tube (C2') to make the overall tube wall thickness uniform. Instead, a protrusion 101a protruding radially inward was formed on a portion of the inner circumference C1', and an air passage 120 was formed along this protrusion 101a. This hollow catheter tube 100 has the advantage that the overall tube rigidity can be equalized or improved because the tube wall thickness is uniform, and the diameter of the air passage 120 can be varied depending on the size of the protrusion 101a. There is. The balloon member 300' of this embodiment is intended to be applied to the hollow catheter tube 100, and the coupling protrusion 300 also has a cylindrical portion 310 corresponding to the hollow opening shape of the air passage 120. It is formed at the center of the bottom 320 (see FIG. 11). However, the coupling protrusion 330' has an insertion groove 331 on one side into which the protrusion 101a is inserted. Therefore, while the protrusion 101a is inserted into the insertion groove 331 of the coupling protrusion, the coupling protrusion 330' can be fitted and coupled to the hollow 112 of the inner circumference of the hollow catheter tube.

As shown in FIG. 9, the other end of the hollow catheter tube 100 is coupled until it comes into close contact with the inner surface 321' of the bottom 320' of the balloon member 300'. When the protrusion 330' is inserted into the hollow 112, the air outlet 124 opened at the other end is covered and sealed by the bottom 321'.

In this embodiment as well, a radiopaque component may be included in at least one of the coupling protrusion 330' and the bottom 320' of the balloon member 300'.

Additionally, the marking function of the catheter can be further strengthened by forming the outer surface of the bottom into a hemispherical protrusion as shown in FIGS. 8 and 9.

In this embodiment as well, the length of the balloon part (B) is extended to the bottom part (320'), so that the balloon part (B) can be uniformly inflated.

That is, as shown in FIG. 10, the top and bottom portions 320' of the balloon member 300' are sealed by an adhesive T and coupled to the hollow catheter tube 100, so the balloon member 300' The cylindrical portion (310': balloon portion (B)) between the upper end and the bottom portion (320') of (300') expands as shown in FIG. 10(b). Also in this embodiment, the outer peripheral surface of the other end of the hollow catheter tube 100, which is in contact with the inner peripheral surface of the cylindrical portion 310' of the balloon member 300', is not bonded with adhesive, so the balloon portion B is It expands and expands to the end portion adjacent to the bottom portion 320' of the member. That is, the bottom 320' and the engaging protrusion 330' of the balloon member 300' are connected to the end surface 101 of the other end of the hollow catheter tube 100 and the inner peripheral surface of the hollow 112 (inner peripheral circle C1). It is tightly fitted and connected to the inner circumferential surface of the ') and ensures airtightness with adhesive (T). Therefore, in the case of the present invention, the balloon portion (B) of the balloon member can be uniformly inflated as shown in FIG. 10(b). In addition, as the length of the balloon part (B) increases, the distance between the end of the balloon part (B) and the bottom part 320' of the balloon member, that is, the end of the balloon catheter 1000 for medical treatment, is uniformly shortened. Therefore, no matter which worker performs the assembly work, uneven expansion according to the adhesive application length can be prevented as in the past.

From FIG. 11, the combined state of the hollow catheter tube 100 and the balloon member 300' can be more easily seen according to the cross section of each line. Specifically, the coupling protrusion 330' of the balloon member 300' is concentrically coupled to the hollow 112 of the hollow catheter tube 100, and the bottom portion 320' of the balloon member 300' is hollow. The process of covering and sealing the opening 124 of the end surface 101 of the catheter tube 100 can be well understood. In addition, a protrusion 101a is formed in the hollow of the inner circumference C1 of the hollow catheter tube 100, and the protrusion 101a is inserted and coupled to the insertion groove 331 of the bottom part 320' of the balloon member. It shows up well.

(Third Embodiment)

Figure 12 is a side cross-sectional view showing an example of a balloon member and a label member according to another embodiment of the present invention, and Figure 13 is a side cross-sectional view showing an example of a balloon member and a label member according to a modified example of Figure 12 of the present invention. Figure 14 is a schematic side view showing the expanded state of the balloon member according to the modified example of Figure 13.

12, the outer cylindrical portion 340 is formed extending from the bottom 320" of the balloon member 300", and the outer cylindrical portion 340 is provided with label members 400 and 400'. It is the same as the embodiment of FIG. 8 except that is combined. That is, in this embodiment as well, a coupling protrusion 330" is formed on the bottom 320" of the balloon member 300" and is fitted and coupled to the hollow of the hollow catheter tube. In addition, the hollow catheter tube 100 The same applies to the fact that a protrusion 101a is formed in the hollow of the inner circumference C1 and the protrusion 101a is inserted and coupled to the insertion groove 331 of the bottom part 320" of the balloon member.

The air injection member, hollow catheter tube, and balloon member of the present invention can be made by known molding methods, such as injection molding or vacuum molding. For example, a cylindrical balloon member having the bottom and engaging protrusion can be molded by injecting a material such as silicon into a mold having the inner shape of the balloon member. In this case, if the material is injected with the radiopaque component injected into the bottom side of the mold, a balloon member containing the radiopaque component can be manufactured as described above.

However, in this embodiment, a radiopaque component having a labeling function is not included in the bottom portion 320" or the engaging protrusion 330" of the balloon member 300", and separate labeling members 400 and 400' are used. The point of installation is different from the above-described embodiment. For example, in cases where it is difficult or expensive to mold a cylindrical part with a radiopaque component, the configuration of the present embodiment may be more preferable. In this case, the procedure may be performed. There is an advantage in that the labeling members 400, 400' can be freely molded to the required thickness or size. The labeling members 400, 400' can be manufactured by, for example, injection molding by including a radiopaque component such as barium sulfate in a plastic resin. You can.

Additionally, in this embodiment, an outer cylindrical portion 340 is formed extending from the outer surface of the bottom surface of the balloon member to couple the label members 400 and 400'. The procedure can be performed by coupling the labeling members 400 and 400' to the outer cylindrical portion 340 and inflating the balloon portion of the cylindrical portion of the balloon member. Since the joining process and adhesion work of the coupling protrusion and the hollow catheter tube are the same as the above-described embodiment, repeated descriptions will be omitted.

The end surfaces of the marking members 400 and 400', that is, the upper surface opposite to the coupling surface coupled to the outer cylindrical portion 340, may be formed as a flat surface or a hemispherical protrusion. When the upper surface is a marking member 400 having a flat surface, the upper surface and the end surface of the outer cylindrical portion 340 can be finished on the same surface (see FIG. 14). Alternatively, in the case of the labeling member 400' whose upper surface is formed with a hemispherical protrusion, the end surface of the balloon catheter 1000 for medical treatment is rounded and smoothly finished, thereby preventing damage to internal tissues when inserted into the human body. there is. In the examples of FIGS. 12 to 14, it was assumed that the catheter tube 100 of the same form as that of FIG. 11 was applied. However, the catheter tube 100 of the same form as that of FIG. 7 can be applied, and thus the coupling protrusion (330") Of course, the placement position or shape can be changed to fit the catheter tube of FIG. 7.

The balloon member 300" and the label members 400 and 400' of FIG. 12 adjust the height of the label members 400 and 400' coupled thereto by adjusting the length (depth) of the outer cylindrical portion 340, as necessary. It has the advantage of being able to be changed and used.

Figure 13 is a modified example of the balloon member of Figure 12. That is, the fact that the outer cylindrical portion is provided on the outer surface of the bottom of the cylindrical portion of the balloon member and the label member is coupled thereto is the same. In this example, the thickness of the engaging protrusion 330" gradually increases toward the bottom 320", and accordingly, the distance between the cylindrical portion 310" and the engaging protrusion 330" is also increased as described above. It gradually gets smaller towards the bottom. The outer peripheral surface of the coupling protrusion 330" may have a linear or curved inclined surface 330"A. Accordingly, when the hollow catheter tube 100 is inserted into the gap, the other end of the catheter tube 100 is tightly fitted into the gap to more tightly couple the catheter tube and the balloon member 300". You can do it.

Additionally, in this modified example, the difference is that the thickness of the tubular portion 310" varies along the longitudinal direction. That is, the inner peripheral surface of the tubular portion 310" extends outward from both ends in the longitudinal direction toward the middle portion in the longitudinal direction. It is formed to draw a convex curved line. Accordingly, the thickness of the tubular portion 310" gradually becomes thinner from both ends in the longitudinal direction of the tubular portion 310" toward the middle portion in the longitudinal direction. Accordingly, the thickness of the inner peripheral surface 312 of both ends of the cylindrical portion 310" is the thickest, and the thickness of the inner peripheral surface 311 of the middle portion of the cylindrical portion is the thinnest. Figure 14 shows the cylindrical portion of this modified example. It shows that the balloon part B is inflated. In Figure 14, the upper surface of the labeling member 400 coupled to the outer cylindrical part 310" is formed as a flat surface. As shown in Figure 14, the air outlet 123 of the hollow catheter tube is located approximately in the middle of the cylindrical portion, so when air is injected and inflated into the cylindrical portion 310" of the above-mentioned shape, the balloon portion B is expanded. It becomes easier. In other words, since the thickness of the cylindrical part that first receives air pressure is thin, it is easily inflated, and the air pressure gradually spreads to both sides, allowing it to be easily inflated to both ends of the thick thickness. Additionally, the shape of the balloon part to be inflated is also different. It has the advantage of being able to expand uniformly into a more streamlined shape.

As in the third embodiment, the matter of gradually increasing the thickness of the engaging protrusion 330" and changing the shape of the inner peripheral surface of the cylindrical portion 310" to vary the thickness of the cylindrical portion along the longitudinal direction are as described above. Of course, it can also be applied to the first and second embodiments.

The materials of the catheter tube, balloon member, and air injection member of the balloon catheter may be materials that are harmless to the human body and have appropriate flexibility, strength, and hardness to suit medical treatment purposes. For example, the balloon catheter of the present invention can be manufactured by selecting a suitable material such as a material that is harmless to the human body, such as flexible silicone, or other plastic resin.

Above, the present invention has been described in more detail through drawings and examples. However, since the configurations described in the drawings or examples described in this specification are only one embodiment of the present invention and do not represent the entire technical idea of the present invention, at the time of filing this application, various equivalents and It should be understood that variations may exist.

100: hollow catheter tube
101: Tube wall (end surface)
101a: protrusion
110: Hollow (passage)
111,112: Openings at both ends of hollow passage
120: Air passage
121,124: Openings at both ends of air passage
122: Air inlet
123: Air outlet
C1,C1': Inner circumference
C2:C2': Outsourcer
200: Air injection member
210: tube joint
220: Valve member coupling portion
221: Air injection pipe
230: valve member
S: Syringe
R: guide rod
300,300',300": Balloon member
310,310',310": barrel shape
320,320',320": Bottom
321,321': Bottom inner surface
322,322': Bottom outer surface
330,330',330": Combined protrusion
331: Insertion groove
340: Outer barrel-shaped portion
400,400': Sign member
T: Adhesive (applicator)
1000,1000;' : Balloon catheter for medical treatment

Claims (11)

A hollow catheter tube with an air passage formed along the wall of the hollow tube;
An air injection member coupled to one end of the hollow catheter tube to inject air into the air passage; and
It surrounds the outer periphery of the other end of the hollow catheter tube, is coupled to the hollow catheter tube, and includes a balloon member that expands with air injected through the air passage,
The balloon member is a cylindrical portion having a bottom, an engaging protrusion is formed to protrude on an inner surface of the bottom, and a gap is formed between the cylindrical portion and the engaging protrusion,
When the hollow catheter tube is inserted and coupled to the cylindrical part of the balloon member so that the other end of the hollow catheter tube is inserted into the gap, the engaging protrusion is fitted and coupled to the hollow of the hollow catheter tube, The bottom of the balloon member and the cylindrical portion extending from the bottom seal and cover the other end of the hollow catheter tube,
A balloon catheter for medical treatment wherein the inner surface of the bottom of the balloon member and the outer peripheral surface of the coupling protrusion are respectively adhered to the end surface of the other end of the hollow catheter tube and the hollow inner peripheral surface of the hollow catheter tube.
According to paragraph 1,
A balloon catheter for medical treatment, wherein the bottom of the balloon member seals the air passage opening to the other end of the hollow catheter tube.
According to paragraph 1,
A balloon catheter for medical treatment wherein the inner peripheral surface of the upper end of the cylindrical portion of the balloon member is adhered to the outer peripheral surface of the hollow catheter tube.
According to paragraph 1,
A balloon catheter for medical treatment, wherein at least one of the bottom of the balloon member and the coupling protrusion includes a radiopaque component.
According to paragraph 2,
The inner circumference forming the hollow of the hollow catheter tube is disposed eccentrically with respect to the outer circumference of the catheter tube, so that the tube wall thickness of the catheter tube changes along the circumference of the inner circumference,
The air passage is formed along the thick tube wall at the part where the distance between the inner circumference and the outer circumference is furthest,
The coupling protrusion is formed eccentrically on the inner surface of the bottom of the balloon member to correspond to the position of the eccentric inner circumference, and the coupling protrusion is inserted into the hollow of the eccentric inner circumference to be coupled to the balloon catheter for medical treatment.
According to paragraph 2,
The inner circumference forming the hollow of the hollow catheter tube is arranged concentrically with respect to the outer circumference of the tube, and a protrusion protruding radially inward is formed on a portion of the inner circumference,
The air passage is formed in the protrusion,
The coupling protrusion is a balloon catheter for medical treatment in which an insertion groove into which the protrusion is inserted is formed on one side, and the coupling protrusion is inserted into the insertion groove and the coupling protrusion is fitted into the hollow of the inner circumference of the catheter tube.
According to paragraph 1,
A balloon catheter for medical treatment in which the thickness of the coupling protrusion gradually increases toward the bottom, and the gap between the cylindrical portion and the coupling protrusion gradually decreases toward the bottom.
According to paragraph 1,
Medical treatment in which the inner peripheral surface of the tubular portion is formed to draw a convex curved line outward from both longitudinal ends toward the longitudinal middle portion, and the thickness of the tubular portion gradually becomes thinner from both longitudinal ends of the tubular portion toward the longitudinal middle portion. For balloon catheter.
According to any one of claims 1 to 8,
A balloon catheter for medical treatment in which the outer surface of the bottom portion is formed with a hemispherical protrusion.
According to paragraph 1,
An outer cylindrical portion is formed extending from the outer surface of the bottom portion,
A balloon catheter for medical treatment in which a labeling member containing a radiopaque component is coupled to the outer cylindrical portion.
According to clause 10,
A balloon catheter for medical treatment wherein the upper surface opposite to the outer cylindrical coupling surface of the labeling member is formed as a flat surface or a hemispherical protrusion.