KR101610776B1 - Trocar - Google Patents

Abstract

The present invention relates to trocar.
According to one aspect of the present invention, there is provided a trocar comprising a head portion and a passage portion, wherein the head portion includes an elastic member that can be brought into close contact with an outer circumference of a minimally invasive surgical tool inserted through the passage portion by expanding or contracting Included Trocars are provided.

Description

Trocar {

The present invention relates to trocar.

Minimally invasive surgery is a minimally invasive surgical technique in which surgery is performed by inserting surgical instruments into the body of a patient (or an animal undergoing surgery) through at least one small incision.

Such minimally invasive surgery may reduce the metabolic process of the patient after surgery, which may help to shorten the patient's recovery period. That is, when the minimally invasive surgery is applied, the patient's post-operative hospitalization period can be shortened, and the patient can return to normal life within a short time after the operation. In addition, through minimally invasive surgery, pain felt by a patient can be alleviated, while scarring remaining in a patient after surgery can be reduced.

A common form of minimally invasive surgery is endoscopic surgery. Among them, the most common type of surgery is laparoscopic surgery, which involves minimally invasive irradiation and surgery within the abdominal cavity. In the case of standard laparoscopic surgery, at least one small incision is made to fill the abdomen of the patient with gas and to provide an entrance to the laparoscopic surgical instrument, and through this, a trocar is inserted, . In performing such surgery, it is common for a user to send a laparoscopic surgical instrument to a surgical site through a trocar and manipulate (or steer) it from outside the abdominal cavity. Such laparoscopic surgical instruments generally include laparoscopic (for observation of surgical sites and the like) and other working tools. Here, the working tool is similar to that used in conventional open surgery, except that the working end (or end working portion) of each tool is spaced from the handle or the like by a predetermined shaft . That is, the working tool may include, for example, a clamp, a grasper, scissors, a stapler, a needle gripper, and the like. On the other hand, the user monitors the progress of the operation by a monitor that displays an image of a surgical site or the like taken by a laparoscope. Similar endoscopic techniques are used in the posterior peritoneal hard tissue, pelviscopy, arthroscopy, hydrocephalus, bovine hard tissue, cervix, renal, cystoscopy, urethral and renal sciences.

When at least a part of the trocar is inserted into the abdominal cavity for the minimally invasive surgery, the user injects gas such as nitrogen into the abdominal cavity to form a space in which the surgical tool can move more smoothly in the abdominal cavity. In order for minimally invasive surgery to be performed successfully, it may be important that the above-described intra-abdominal space is maintained until the operation is completed. In a typical trocar, a closed mouthpiece member made of a resilient material is placed in the passageway for the minimally invasive surgical tool so that a minimally invasive surgical tool is allowed to pass through the passageway, Avoid spills.

However, since the minimally invasive surgical tool must be moved in the passage of the trocar while the operation is performed, a gap is formed in the closed mouth-shaped member, and the gas in the abdominal cavity is often leaked to the outside through the gap. Therefore, the conventional trocar can not completely prevent the outflow of gas in the abdominal cavity, and there is a problem that as the operation progresses, the space in the abdominal cavity is reduced.

The present inventor (s) has disclosed Korean Patent Application No. 2008-99872 and International Application No. PCT / KR2009 / 005795 with respect to Trocar which is superior to conventional Trocar Should be considered as being incorporated herein).

We now hereby propose, through this specification, a more useful trocar than Trocars or Trocars introduced through the above applications.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems of the prior art.

Another object of the present invention is to provide a trocar which almost completely prevents the outflow of gas in the abdominal cavity.

In order to accomplish the above object, a representative structure of the present invention is as follows.

According to one aspect of the present invention, there is provided a trocar comprising a head portion and a passage portion, wherein the head portion includes an elastic member that can be brought into close contact with an outer circumference of a minimally invasive surgical tool inserted through the passage portion by expanding or contracting Included Trocars are provided.

Other configurations may be further provided in accordance with the technical idea of the present invention.

According to the present invention, there is provided a trocar which almost completely prevents the outflow of gas in the abdominal cavity.

FIG. 1 is a view showing an overall view of a minimally invasive surgical trocar according to a first embodiment of the present invention. FIG.
Fig. 2 is a view showing the head portion of the trocar of Fig. 1;
Fig. 3 is a view for explaining the operation of the tube of Fig. 2;
4 is a view showing a state of a multi-channel type trocar according to a second embodiment of the present invention.
Figure 5 is a cross-sectional view of the multi-channel trocars of Figure 4;
FIG. 6 is a view showing an overall view of a trocar according to a third embodiment of the present invention. FIG.
Fig. 7 is a view showing the head portion of the trocar of Fig. 6;
FIG. 8 is a view showing an overall view of a trocar according to a fourth embodiment of the present invention. FIG.
Fig. 9 is a view showing the head portion of the trocar of Fig. 8; Fig.
Fig. 10 is a view for explaining the operation of the tube in the head portion of Fig. 9. Fig.
11 is a view showing a head portion of a trocar according to a fifth embodiment of the present invention.
12 is a view for explaining the operation of the tube in the head portion of Fig.
13 is a view showing a head portion of a trocar according to a sixth embodiment of the present invention.
14 is an exploded view of the head portion of Fig.
Fig. 15 is a view for explaining the operation of the elastic member in the head portion of Fig. 13;
FIG. 16 is a view showing an overall view of a minimally invasive surgical trocar according to a seventh embodiment of the present invention. FIG.
Fig. 17 is a view for explaining the operation of the elastic member in the head portion of the trocar of Fig. 16;

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented and changed without departing from the spirit and scope of the invention, from one embodiment to another. It is also to be understood that the location or arrangement of the individual components within each embodiment may be varied without departing from the spirit and scope of the present invention. Therefore, the following detailed description is not to be taken in a limiting sense, and the scope of the present invention should be construed as encompassing the scope of the appended claims and all equivalents thereof. In the drawings, like reference numbers designate the same or similar components throughout the several views.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

In the present specification, the term "connection" should be understood to mean a direct or indirect connection (i. E., Via a separate component) between mechanical or other types of components. For example, the connection between the two rotating components may be a direct connection by engagement of the gear structure or the like, but may be an indirect connection due to the intervention of a separate component such as a cable or a groove.

In a preferred embodiment of the present invention

Hereinafter, various embodiments of the present invention will be described. In the following description, it is to be noted that the description of the operation or action of a component or an element of one embodiment may be appropriately omitted if the component or the like is similar to the previously described embodiment.

FIG. 1 is a view showing the entirety of a minimally invasive surgical trocar according to a first embodiment of the present invention, and FIG. 2 is a view showing a head part of the trocar of FIG. 1.

As shown, the trocar 10 may include a head portion 100 and a passage portion 200.

The head portion 100 includes a passage 110 through which a minimally invasive surgical tool (not shown) can be inserted, a space 120 that can be formed in the middle of the passage 110 (Which may be an internal or external part that is formed by a predetermined mechanical element (e.g., an outer wall or the like) within the housing 100), a donut A tube 130 which is a resilient member in the shape of a ring or the like and a tube 130 connected to the tube 130 and capable of supplying fluid such as gas or liquid to the tube 130 or discharging fluid from the tube 130 A valve 140 and an opening and closing member 150 which may be formed at an end of the head part 100 on the side of the passage part 200. [ Meanwhile, a tube 135 is inserted into one side of the tube 130 so that the tube 130 and the valve 140 are connected to each other. Thus, the amount of fluid in the tube 130 can be regulated by the valve 140. And, the opening and closing member 150 can be formed of a material having elasticity such as silicon, which can have a shape in which two portions of the lip shape are in contact with each other as shown in the drawing.

Fig. 3 is a view for explaining the operation of the tube of Fig. 2;

3 (a) shows a state in which the fluid is not sufficiently supplied to the tube 130. (B) shows a state in which the fluid is sufficiently supplied to the tube 130. Fig. When the fluid is sufficiently supplied to the tube 130 and the tube 130 is inflated, it is brought into close contact with the outer periphery of the minimally invasive surgical tool inserted into the passage 110 as its inner diameter decreases. Can be prevented or minimized from flowing out to the outside through the heat exchanger (110). In addition, even if the minimally invasive surgical tool moves in the passage 110 during the operation, the close contact state between the tube 130 and the outer circumference of the minimally invasive surgical tool can be maintained. Therefore, Action can be maintained.

FIG. 4 is a view showing a multi-channel type trocar according to a second embodiment of the present invention, and FIG. 5 is a sectional view of the multi-channel type trocar of FIG.

As shown, the multichannel trocar 20 may be one that allows a plurality of minimally invasive surgical tools to be inserted at the same time. The multichannel trocar 20 includes a plurality of head portions 300, a head connecting portion 400 that allows a plurality of head portions 300 to be connected to each other, and an insertion portion 500 ). The tube 130 and the intraperitoneal leakage preventing structure of the first embodiment can be applied to each head 300 of the multichannel trocar 20 as well.

FIG. 6 is a view showing an overall view of a trocar according to a third embodiment of the present invention, and FIG. 7 is a view showing a head portion of the trocar of FIG.

As shown, the trocar 30 may include a head portion 100a. The head portion 100a may include a first head portion 100a-1 having a female screw structure 160 and a second head portion 100a-2 having a male screw structure 161 formed thereon have. As shown in the lower part of the first head part 100a-1, a pressing member 162 may be formed. A space 120a may be formed on the inner side of the second head portion 100a-2 and a tube 130a may be disposed on the space 120a. Unlike in the first embodiment, the tube 130a is not operated by the action of the valve, and the first head portion 100a-1 is screwed downward relative to the second head portion 100a-2 Accordingly, when the pressing member 162 applies a downward pressure, the inner circumference may be reduced as the outer circumference is compressed by the pressure. Therefore, the tube 130a can be brought into close contact with the periphery of the minimally invasive surgical tool.

FIG. 8 is a view showing an overall view of a trocar according to a fourth embodiment of the present invention, and FIG. 9 is a view showing a head portion of the trocar of FIG.

As shown in the figure, a space 120b may be formed in the head portion 100b and a tube 130b may be disposed in the space 120b. A push switch 170 including a hook member 171 and a protrusion 172 may be formed on the outer surface of the head portion 100b. The projecting portion 172 of the push switch 170 can push the pump 173 that can be disposed in the head portion 100b as the push switch 170 is pressed. The pump 173 may be connected to the tube 130b to allow fluid movement therebetween. On the other hand, in the vicinity of the push switch 170, there can be further provided a fixed switch 175 which can fix the push switch 170 as required. This fixed switch 175 may include an engaging member 176, which may cooperate with the hook member 171 to maintain the depression of the push switch 170. [

Fig. 10 is a view for explaining the operation of the tube in the head portion of Fig. 9. Fig.

when the user pushes the push switch 170 and then fixes the push switch 170 with the push switch 175, the protrusion 172 of the push switch 170 is pushed by the pump 173, A fluid such as a gas or a liquid in the pump 173 can be moved into the tube 130b. As a result, the tube 130b can expand and its inner diameter can be reduced.

when the user releases the fixed switch 175, the push switch 170 can be released from the fixed switch 175 and the pressure of the protrusion 172 applied to the pump 173 The pump 173 is restored to its original size and the hydraulic pressure in the pump 173 becomes lower than the hydraulic pressure in the tube 130b so that some of the fluid in the tube 130b returns to the pump 173 . Therefore, the tube 130b can be reduced and its inner diameter can be increased.

FIG. 11 is a view showing a head portion of a trocar according to a fifth embodiment of the present invention, and FIG. 12 is a view for explaining the operation of the tube in the head portion of FIG.

11, the head portion 100c includes characteristic elements in the fourth embodiment including push switches 170a and 170b (hook members 171a and 171b and protrusions 172a and 172b) ), Pumps 173a and 173b, and fixed switches 175a and 175b (including latching members 176a and 176b), and the like. Therefore, according to the present embodiment, since the user can use the appropriate number of push switches 170a and 170b to gradually reduce the inner diameter of the tube 130c that can be disposed in the space 120c, The inner diameter of the tube 130c can be adjusted according to the thickness of the minimally invasive surgical tool inserted into the tube 130c. 12 (a) showing the case where the user has reduced the inner diameter of the tube 130c by using only the first push switch 170a and the case where the user pushes the first push switch 170a and the second It is further possible to refer to FIG. 12 (b) showing a case where the push switch 170b is also used to further reduce the inner diameter of the tube 130c.

13 is an exploded view of the head portion of Fig. 13, and Fig. 15 is a cross-sectional view of the head portion of the trocar according to the sixth embodiment of the present invention, Fig.

First, a description will be made with reference to Figs. 13 and 14. Fig.

As shown in the figure, a space 120d may be formed in the head portion 100d. Although this space 120d may not have a particularly limited shape as in the above-described embodiments, it is preferable that the inside thereof is divided into a first space 120d-1 closer to the center and a second space 120d- And a partition 120d-3 separating the partition wall 120d-1 and the partition wall 120d-2. At least one (preferably, a plurality of) openings 120d-4 may be formed in the partition 120d-3.

The elastic member 130d may be accommodated in the first space 120d-1. The elastic member 130d includes a first flange 131d for shielding the upper surface of the second space 120d-2 and a second flange 131d for partially opening the lower surface of the second space 120d- 132d, or may be integrally formed with the flanges 131d, 132d.

Further, the opening and closing member 150d may be further included below the space 120d. The opening and closing member 150d may have a shape in which two lip portions are in contact with each other as shown in the figure and a third flange 151d that is partially opened to allow fluid to be introduced into the space 120d, . ≪ / RTI >

On the other hand, a fixing member 180 may be disposed between the space 120d and the opening and closing member 150d. Such anchoring member 180 may be partially open as shown to allow fluid to be introduced into the space 120d as described below.

Further, when the fluid is introduced into the first space 120d-1 from the second space 120d-2 through the opening 120d-4, it is disposed in the first space 120d-1, The first ring 181, the second ring 182, and the spacer 183 including a plurality of holes may be further included so as to apply a proper pressure to the first ring 181, the second ring 182,

The spacer 183 may be disposed so as to surround the elastic member 130d so that the height of the elastic member 130d is maintained while the hydraulic pressure acts on the elastic member 130d effectively.

The first ring 181 and the second ring 182 can seal the portion of the spacer 183 outside the hole, respectively. The first ring 181 and the second ring 182 also serve to keep the prototype as much as possible even when the shape of the elastic member 130d changes due to the movement of the minimally invasive surgical tool during surgery . The first ring 181 and the second ring 182 may be formed so that the elastic members 130d and the second flanges 132d are connected to the first flange 131d and the second flange 132d, As shown in FIG. The corrugated portion of the elastic member 130d may also help to keep the original shape of the elastic member 130d as much as possible despite the elongation and contraction of the elastic member 130d.

The fluid channel 190 may further include a fluid channel 190 for supplying fluid from the outside of the head portion 100d to the second space 120d-2 and then to the first space 120d-1. Such fluid may be the same kind of gas as the gas in the abdominal cavity.

15 will be further discussed. When fluid is supplied from the outside of the head portion 100d to the space 120d through the fluid channel 190 as shown in Fig. 15, only the elastic member 130d can be compressed have. Accordingly, even if the minimally invasive surgical tool moves in the passage 110d, gas in the abdominal cavity can be prevented from flowing out.

FIG. 16 is a view showing the entirety of a minimally invasive surgical trocar according to a seventh embodiment of the present invention, and FIG. 17 is a view for explaining the operation of the elastic member in the head portion of the trocar of FIG. 16 .

As shown, the trocar 50 may include a head portion 100e. The head portion 100e-1 may include a first head portion 100e-1 and a second head portion 100e-2. The first head portion 100e-1 and the second head portion 100e-2 May be coupled to each other similarly to the head portion 100a of the third embodiment. An upper support portion 163 may be disposed under the first head portion 100e-1 in the space 120e of the head portion 100e and a lower support portion 164a may be provided on the second head portion 100e- ) May be disposed. As in other embodiments, the space 120e may be provided with an elastic member 130e, which may be of the shape as shown, having a wide width at the top and bottom portions and a narrow width at the middle portions. Both ends of the upper portion of the elastic member 130e are fixed to the upper support portion 163 and both ends of the lower portion thereof may be fixed to the lower support portion 164. Thus, the user can move the first head part 100e-1 upward and downward with respect to the second head part 100e-2 so that the distance between the upper support part 163 and the lower support part 164 is increased, The width of the middle portion of the elastic member 130e may be increased by increasing the width of the middle portion of the member 130e or by bringing the distance between the upper support portion 163 and the lower support portion 164 closer (In the case of (b)). That is, the user can adjust the degree of close contact of the elastic member 130e with respect to the outer circumference of the minimally invasive surgical tool according to circumstances, so that the gas in the abdominal cavity is prevented from flowing out.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the scope of the present invention.

Accordingly, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all ranges that are equivalent to or equivalent to the claims of the present invention as well as the claims .

10, 30, 50: Trocar
20: Multichannel Troika
100, 100a, 100b, 100c, 100d, 100e, 300:
200: passage portion

Claims (2)

As trocar,
Head portion, and
The passage portion
Lt; / RTI >
Wherein the head portion includes an elastic member that can be brought into close contact with an outer periphery of a minimally invasive surgical tool that is expanded or contracted and inserted through the passage portion,
Wherein the elastic member is disposed in a space included in the head portion,
Wherein the elastic member is compressed in the direction of the minimally invasive surgical tool and is brought into close contact with the periphery of the minimally invasive surgical tool,
Wherein the head portion further comprises a spacer disposed to surround the elastic member,
Wherein the spacer includes a plurality of holes and portions of the spacer other than the plurality of holes are sealed. The method according to claim 1,
Wherein the space is separated by a first space closer to the center and by a partition having an opening in the second space,
Wherein the elastic member is disposed in the first space,
One surface of the second space being shielded by a flange,
And the elastic member is compressed by the fluid flowing through the second space.

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