JP2010125051A - Catheter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medicine administering device for administering a medicine by reducing a load on a mammal including a human even when a treatment object has a comparatively large volume. <P>SOLUTION: A catheter 2 for guiding the medicine into the body of the mammal including the human includes: a tube 3 for guiding the medicine to a prescribed region in a body; and a medicine administering part 7 arranged at the distal end of the tube 3 and having a plurality of medicine discharge ports on the side surface, which discharge the medicine guided by the tube 3 to the inner part of the body. At least the distal end of the medicine administering part 7 is formed to be a circular-arcuate or helical shape, for example. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a catheter that can be anchored in the body of a mammal including a human and guides a drug into the body.

  Traditionally, catheters have been used to guide drugs into the body of mammals, including humans. In this conventional catheter, a straight puncture needle having an internal passage is attached to the tip of a flexible tube (see Patent Document 1). In such a catheter, the medicine is usually discharged into the body from an opening provided at the tip of the puncture needle. Therefore, the discharge position of the medicine is only one point.

  On the other hand, a straight puncture needle having a plurality of drug discharge holes provided on the side surface of the catheter is known. In this case, since the drug is discharged from a plurality of locations on the side surface of the puncture needle, the drug discharge position is a straight line. Will be distributed.

JP-A-3-57457

  By the way, when the affected part has a certain volume, when the above-described conventional catheter is used, a plurality of catheters are used to spread the medicine throughout the affected part. In this case, since it is necessary to attach a plurality of catheters in the body, there is a problem that the burden on mammals including humans to be administered drugs is large.

  The present invention has been made in view of the above, and provides a catheter capable of reducing the burden on mammals including humans and administering a drug even for a treatment target having a relatively large volume. For the purpose.

  In order to solve the above-described problems and achieve the object, a catheter according to the present invention is a catheter that guides a drug into the body of a mammal including a human, the tube guiding the drug to a predetermined site in the body, and the tube And a medicine administration section having a plurality of medicine ejection openings on the side surface for ejecting the medicine guided to the body into the body, wherein the medicine administration section is formed at least in a circular arc shape. It is characterized by. Here, the arc shape means that an elongated three-dimensional axis is an arc or a helix, and when the yarn is wound horizontally or diagonally on the surface of a virtual cylinder, the yarn takes off. A three-dimensional shape. The horizontal case corresponds to the arc, and the diagonal corresponds to the spiral. When an elongated three-dimensional object has an arc shape, when the three-dimensional object is inserted into or extracted from a tissue, the rotational movement around the virtual cylinder axis is caused by the three-dimensional object. In addition, it can be easily inserted and removed. In addition, at the time of insertion, the subsequent portion passes through the path in the tissue formed by the elongate three-dimensional advance tip, so that the invasion to the tissue is small. Also during extraction, the tissue can be extracted through a path formed in the tissue at the time of insertion, so that the invasion to the tissue is small.

  In the above-described invention, the catheter according to the present invention is characterized in that the arc shape is a spiral shape.

  The catheter according to the present invention is characterized in that, in the above-described invention, the drug administration part is formed in a J-shape.

  The catheter according to the present invention is characterized in that, in the above-described invention, the tube and the drug administration section are detachably connected by a connector having a passage through which a drug can flow.

  In the above-described invention, the catheter according to the present invention can be inserted into and removed from the internal passage of the drug administration section, and is inserted into the internal passage of the drug administration section to maintain the shape of the drug administration section. Furthermore, it is characterized by having.

  In the catheter according to the present invention as set forth in the invention described above, the core material is a metal rod bent along the shape of the internal passage of the drug administration section.

  In the catheter according to the present invention, in the above-described invention, the drug administration portion formed in an arc shape has an inner passage wall having at least a two-layer structure, and an inner layer of the two-layer structure is an outer layer. It is characterized by being formed of a material harder than the layer.

  The catheter according to the present invention is characterized in that, in the above-described invention, the inner layer is made of metal.

  According to the present invention, at least the distal end portion of the drug administration unit provided at the distal end of a tube for guiding the drug to a predetermined site in the body and having a plurality of drug discharge ports on the side for discharging the drug guided to the tube into the body. Is formed in an arc shape, so that even a treatment target having a relatively large volume can administer a drug while reducing the burden on mammals including humans.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a catheter according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic diagram showing a state where the catheter according to the first embodiment of the present invention is applied to a human body. FIG. 2 is a perspective view showing a detailed configuration of the drug administration section 7 of the catheter shown in FIG. In FIG. 1, a plan is given by continuously and intensively discharging a drug such as an anticancer drug of about several tens ml to a subject to be administered to mammals including humans, for example, a body organ 8 such as a liver over a long period of about one week. The case of administration is shown. In addition, the chemical | medical agent here contains a liquid and a gel-form chemical | medical agent.

  1 and 2, the drug administration device 1 includes a catheter 2 and a drug administration device body 5 that supplies the drug to the catheter 2. The catheter 2 is provided at the distal end of the tube 3 via a tube 3 made of flexible polyethylene or the like having biocompatibility and connectors 6a and 6b, and has a plurality of drug discharge ports 12 on the side. Part 7. A port 10 attached to the body surface 9 is provided in the middle of the tube 3.

  The drug administration unit 7 has an arc shape at least at the tip, and is embedded in the internal organ 8. The drug administration unit 7 has a spiral shape as an example of an arc shape. The drug administration unit 7 has the tip 13 closed and is not provided with a drug discharge hole. Further, the drug administration section 7 has a double structure in which the wall of the internal passage is composed of a hard inner layer 11a such as metal and an outer layer 11b which is harder than the inner layer 11a and is realized by, for example, polyethylene. The inner layer 11a has an action of maintaining the spiral shape of the entire drug administration unit 7, and the outer layer 11b has an action of maintaining biocompatibility.

  When this catheter 2 is attached to the body, it is attached to the internal organ 8 by advancing the drug administration part 7 along the helical axis while the connectors 6a and 6b are disconnected. When the attachment of the drug administration unit 7 to the internal organ 8 is completed, the connectors 6a and 6b are connected. Thereby, the medicine supplied from the medicine administration device body 5 is sent to the medicine administration section 7 via the tube 2 and the connectors 6a and 6b, and from a plurality of medicine discharge ports 12 provided on the side surface of the medicine administration section 7. Discharged. When the catheter 2 is removed from the body, the connectors 6a and 6b are removed, and the drug administration unit 7 can be easily removed from the internal organ 8 by pulling out the drug administration unit 7 while rotating it backward along the spiral axis. it can.

  Here, the drug administration unit 7 attached in the internal organ 8 has a spiral shape, and a plurality of drug discharge ports 12 are provided on the side surface of the spiral shape, so that the internal organ having a relatively large volume. The drug can be spread over the entire 8 affected areas. In addition, since the drug administration unit 7 has a spiral shape, it is well attached to the internal organ 8, and does not easily escape from the internal organ 8 and can perform stable drug administration.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. The drug administration unit 7 of the first embodiment described above has a double wall structure. However, the drug administration unit 7 of the second embodiment is replaced by the inner layer 11a as shown in FIG. A metal rod 14 shown in FIG. 4 bent along the shape of the passage is inserted into the internal passage as a core material from the connector 6b side to the tip. In the drug administration unit 7, the spiral shape of the entire drug administration unit 7 is held by the metal rod 14. The portion corresponding to the outer layer 11b is connected to the connector 6b.

  In a state where the metal rod 14 is inserted into the internal passage, the drug administration unit 7 is advanced while rotating along the helical axis, so that the drug administration unit 7 is attached to the internal organ 8 while maintaining the helical shape. Thereafter, the metal rod 14 is pulled out from the internal passage, and the catheter 2 is formed by connecting the connectors 6a and 6b as shown in FIG.

  In the second embodiment, similar to the first embodiment, the drug can be spread over the entire affected area of the internal organ 8 having a relatively large volume.

(Embodiment 3)
Next, a third embodiment of the present invention will be described. In the first and second embodiments described above, the drug administration unit 7 has a spiral shape, but in this third embodiment, as shown in FIGS. 6 and 7, the drug administration unit 15 corresponding to the drug administration unit 7. The tip of is J-shaped.

  The medicine administration section 15 has a connector 6b and is detachable through a connector 6a provided at the distal end of the tube 2. As shown in FIG. 7, a plurality of medicine discharge ports 17 are provided on the side surface of the medicine administration section 15.

  Similar to the drug administration unit 7, the drug administration unit 15 has a double wall structure. The J shape is held by the inner layer 16.

  When the drug administration unit 15 is attached to the internal organ 8, the tip of the drug administration unit 15 is attached to the internal organ 8. Thereby, the medicine administration part 15 attached in the internal organ 8 is J-shaped, and a plurality of medicine discharge ports 17 are provided on the side surface of the J-shape, so that it has a relatively large volume. The drug can be spread over the entire affected area of the internal organ 8. In addition, since the drug administration section 15 is J-shaped, it is well attached to the internal organ 8 and does not easily escape from the internal organ 8 and can perform stable drug administration.

  As shown in FIG. 8, similarly to the second embodiment, a metal rod 18 that can be inserted into and removed from the internal passage of the medicine administration section 15 may be inserted into the internal passage of the medicine administration section 15 as a heart material. .

It is a schematic diagram which shows the state by which the catheter concerning Embodiment 1 of this invention was applied to the human body. It is a perspective view which shows the detailed structure of the chemical | medical agent administration part of the catheter shown in FIG. It is a perspective view which shows the detailed structure of the chemical | medical agent administration part of the catheter concerning Embodiment 2 of this invention. It is a figure which shows the metal rod used for the chemical | medical agent administration part of FIG. It is a figure which shows the catheter which connected the chemical | medical agent administration part and tube which were shown in FIG. It is a schematic diagram which shows the state by which the catheter concerning Embodiment 3 of this invention was applied to the human body. It is a perspective view which shows the detailed structure of the chemical | medical agent administration part of the catheter shown in FIG. It is a perspective view which shows the structure of the chemical | medical agent administration part which is a modification of Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drug administration apparatus 2 Catheter 3 Tube 5 Drug administration apparatus main body 6a, 6b Connector 7,15 Drug administration part 8 Internal organ 9 Body surface 10 Port 11a, 16 Inner layer 11b Outer layer 12,17 Drug discharge port 13 Tip 14, 18 Metal rod

Claims (8)

A catheter that guides drugs into the body of mammals, including humans,
A tube for guiding the drug to a predetermined site in the body;
A drug administration unit provided at the tip of the tube, and having a plurality of drug discharge ports on the side surface for discharging the drug guided to the tube into the body;
The catheter is characterized in that at least the tip of the medicine administration part is formed in an arc shape.   The catheter according to claim 1, wherein the arc shape is a spiral shape.   The catheter according to claim 1, wherein the drug administration unit is formed in a J shape.   The catheter according to claim 1, wherein the tube and the drug administration unit are detachably connected by a connector having a passage through which a drug can flow.   5. The catheter according to claim 4, further comprising a heart material that is insertable into and removable from an internal passage of the drug administration unit and is inserted into the internal passage of the drug administration unit to maintain the shape of the drug administration unit. .   The catheter according to claim 5, wherein the core material is a metal rod bent along the shape of the internal passage of the drug administration unit.   In the drug administration part formed in an arc shape, the wall of the inner passage has at least a two-layer structure, and the inner layer of the two-layer structure is formed of a material harder than the outer layer. The catheter according to claim 1.   The catheter according to claim 7, wherein the inner layer is made of metal.

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