JP6464291B1 - Trocar - Google Patents

Abstract

To provide a trocar that can solve the problems of existing technology.
A trocar of the present invention includes an obturator and a sleeve, the obturator includes a seat portion and a puncture portion, the puncture portion includes a convex block and a sharp end, and the convex block includes a puncture portion. The sleeve includes a seal seat, a first tube member, a second tube member, a fixed seat, and an airbag, and the second tube member can be contracted. One tube member can be accommodated in the second tube member, the fixed seat is fixed to the second tube member, the inner wall of the fixed seat is provided with a guide groove and a key groove, and the depth of the guide groove is larger than the key groove. The guide groove and the key groove are communicated, and when the convex block of the obturator enters from the guide groove and rotates to lock the convex block in the key groove, the obturator and the fixed seat are fixed, and the obturator is fixed. Lator It can be moved on the major axis of the obturator to move the fixed seat body.
[Selection] Figure 3

Description

  The present invention relates to minimally invasive surgical instruments, and in particular to trocars.

  In current surgery, a scalpel is replaced with a trocar, an opening is made in the human body, and surgical procedures such as cauterization and excision of tissue in the body are performed with medical instruments such as optical fibers, endoscopes, and lasers. This surgical method can reduce a patient's wound, reduce the feeling of pain, reduce hospitalization and post-operative resting time, and reduce the scar after recovery. Because these surgical wounds are small and recover quickly, they are called minimally invasive surgery.

  A trocar usually includes a catheter and a knife used for puncture, and after the knife is inserted into the catheter and an opening is made in the human or animal body with the knife, the knife is removed from the catheter and the catheter is secured to the human body, followed by A surgical instrument such as an optical fiber, an endoscope, or a laser is inserted deeply into the human body along the catheter to perform operations such as tissue resection or cauterization.

  The existing trocar catheter is fixed on the human body or animal at the operation stage, and is relatively long, so that it is liable to contact and swing, and to interfere with the operation of the medical staff. In addition, since the knife is only restricted by the catheter tube wall and the catheter and the knife can be moved relative to each other, if the position is adjusted and the position needs to be adjusted, a separate destructive invasion is caused and the wound is injured. Expands, increasing patient pain and discomfort.

  The objective of this invention is providing the trocar which can solve the problem of existing technology.

The trocar of the present invention includes an obturator and a sleeve.
The obturator includes a seat portion and a puncture portion, the puncture portion extends in a direction perpendicular to the seat portion, and the puncture portion includes a convex block and a sharp end. The sharp end is located at the other end of the puncture portion opposite to the seat portion, and the convex block extends radially outward from the outer surface of the puncture portion.
The sleeve includes a seal seat, a first tube member, a second tube member, a fixed seat, and an airbag, and the seal seat includes a grip portion, a connecting portion, and a first air valve. The grip portion includes an opening, the puncture portion is inserted from the opening, and the seat portion contacts the grip portion. The connecting portion extends from the grip portion and includes a built-in passage, and the built-in passage communicates with the opening. The first air valve is connected to the connecting portion and is connected to the built-in passage. The first tube member includes a first built-in end and a first connecting end, the first built-in end is built into the built-in passage, and the first built-in end corresponds to the first air valve. And at least 1 1st opening is opened on the pipe wall of the said 1st connection end. The second tube member includes a second built-in end and a second connecting end, and the second built-in end is connected to the first connecting end so as to expand and contract. The second tube member is shrinkable relative to the first tube member, and the total length of the first tube member and the second tube member is shortened by accommodating the first tube member in the second tube member. it can. The fixed seat is fixed to the second connecting end, and the fixed seat includes a passage, an inner edge wall, a guide groove, a key groove, and an air supply port. The passage extends through the fixed seat, the inner edge wall extends toward the passage so as to follow the inner wall surface of the fixed seat, the guide groove communicates with the passage, and is adjacent to the inner edge wall. The key groove is formed in the inner edge wall and communicates with the guide groove. The key groove has a width at one end far from the guide groove smaller than a width at one end near the guide groove. The air supply port is formed on the outer surface of the fixed seat, and a part of the puncture portion is located in the built-in passage, the first tube member, the second tube member, and the passage, and the sharp end protrudes from the fixed seat. Is done. The airbag is attached to a fixed seat and corresponds to the air supply port. When the convex block of the obturator enters from the guide groove, rotates, slides the convex block along the key groove, and contacts the inner edge wall, the obturator and the fixed seat are fixed, and the obturator is fixed. The tutor moves the sleeve along the long axis of the obturator.

  In some embodiments, the first tube member further includes a first inner tube and a first outer tube, and the first tube member is divided into a first tube wall region and a second tube wall region. In the first tube wall area, the first outer tube surrounds the first inner tube. In the second tube wall area, the first outer tube does not surround the first inner tube. The second tube member includes a second inner tube and a second outer tube, and the second tube member is divided into a third tube wall region and a fourth tube wall region. In the third outer tube wall region, the second outer tube surrounds the first outer tube, and in the fourth outer tube wall region, the second outer tube wall surrounds the second inner tube. A first opening is opened in the tube wall of the first outer tube.

  Further, the first opening, the first outer tube, the second outer tube, the second outer tube, the second inner tube, and the air supply port are communicated between the first inner tube and the first outer tube. An airflow passage is formed. After the gas enters from the first air valve, it flows along the airflow passage and enters the airbag via the air supply port.

  In some embodiments, the trocar further includes an airtight unit. The airtight unit is installed on a part of the first tube member and the second tube member, and seals a connection portion of the first tube member and the second tube member. More specifically, the hermetic unit includes a stopper and a hermetic cover tube, the stopper is incorporated near the first connection end on the first tube member, and the hermetic cover tube is connected to the first tube member and the second tube member. The airtight cover tube covers the stopper.

  When the trocar is extended, the second tube member can be moved away from the seal seat relative to the first tube member and extended until the stopper and the second tube member come into contact with each other. When the sleeve is contracted, the second tube member is moved in the direction of the gripping portion relative to the first tube member, the first tube member is accommodated in the second tube member, and the airtight unit and the connecting portion are Can be shrunk until contact.

  Further, the hermetic unit includes a hermetic ring, the hermetic ring is attached to a portion of the first tube member, contacts the stopper, and the hermetic ring is covered in the hermetic cover tube. In some other embodiments, the hermetic unit further includes a fastening member that is incorporated into the first coupling end and contacts an inner wall of the second inner tube.

  In some embodiments, the obturator can be freely retracted from within the sleeve when the convex block is returned from the keyway to the guide groove.

The sleeve trocar presented by each embodiment of the present invention is such that the obturator is fixed through a keyway mainly by a fixed seat of the convex block and the sleeve, and the obturator moves along the axial direction in synchronization with the sleeve. Can be adjusted to the most appropriate position. In addition, the first tube member and the second tube member are connected to each other, the first tube member can be accommodated in the second tube member, and the length of the sleeve can be expanded and contracted.
The obturator can move in synchrony with the sleeve, either in the stretched or contracted state, which is advantageous for immediate adjustment, avoids repeated destructive intrusions, prevents contact, enlarges the wound and pains the patient And the increase in discomfort can be reduced. Further, since the length of the sleeve outside the human body can be shortened, the medical staff can perform surgery more conveniently.

It is a three-dimensional figure of one Example of the trocar of this invention. It is a three-dimensional exploded view of one embodiment of the trocar of the present invention. It is the elements on larger scale of the fixed seat body and obturator of FIG. FIG. 4 is a cross-sectional view of a state where the obturator of FIG. 3 is not fixed to a fixed seat. It is sectional drawing of the state by which the obturator of FIG. 3 was fixed to the fixed seat. It is sectional drawing at the time of operation of one Example of the trocar of this invention. It is sectional drawing which shows the axial direction movement and positioning of one Example of the trocar of this invention. FIG. 6 is a partial cross-sectional view of the sleeve of FIG. 5. FIG. 6 is a cross-sectional view of the sleeve of FIG. 5 in a contracted state.

1 and 2 show a three-dimensional view of one embodiment of the trocar of the present invention and a three-dimensional exploded view of one embodiment of the trocar of the present invention, respectively.
3 is a partially enlarged view of the fixed seat and obturator of FIG. 2, FIG. 3A is a cross-sectional view of the obturator of FIG. 3 not fixed to the fixed seat, and FIG. 3B is the obturator of FIG. FIG. 4 is a cross-sectional view of an embodiment of the trocar of the present invention during operation, and FIG. 5 shows axial movement and positioning of an embodiment of the trocar of the present invention. 6 is a partial cross-sectional view of the sleeve of FIG. 5, and FIG. 7 is a cross-sectional view of the sleeve of FIG. 5 in a contracted state.

As shown in FIGS. 1 and 2, the trocar 1 includes an obturator 10 and a sleeve 20. The obturator 10 includes a seat portion 11 and a puncture portion 13, and the puncture portion 13 extends in a direction perpendicular to the seat portion 11. The puncture unit 13 includes a convex block 131 and a sharp end 133. The sharp end 133 is disposed at the other end of the puncture unit 13 facing the seat 11.
The convex block 131 is extended in the radial direction from the outer surface of the puncture unit 13 to the outside. Here, the convex block 131 is a convex block in which a local portion of the outer surface of the puncture unit 13 projects radially on the outer surface of the puncture unit 13, but this is merely an example, and the outer surface of the puncture unit 13 has an annular outer diameter. It may be a boss protruding on the surface. The sleeve 20 includes a seal seat body 21, a first tube member 23, a second tube member 25, a fixed seat body 27, and an airbag 29.

As shown in FIG. 2, the seal seat 21 includes a grip portion 211, a connecting portion 213, and a first air valve 215. The grip part 211 includes an opening 2111, the puncture part 13 is inserted from the opening 2111, and the seat part 11 is in contact with the grip part 211. The connecting portion 213 is extended from the grip portion 211, and the extending direction is parallel to the major axis direction of the puncture portion 13.
The connecting portion 213 includes a built-in passage 2131, and the built-in passage 2131 communicates with the opening 2111. The first air valve 215 is connected to the connecting portion 213 and is connected to the built-in passage 2131 so that the gas fed from the first air valve 215 can enter the built-in passage 2131.

The first tube member 23 includes a first built-in end 231 and a first connecting end 233, the first built-in end 231 is built into the built-in passage 2131, and the first built-in end 231 is the first air valve 215. And at least one first opening 2331 is formed on the tube wall of the first connecting end 233.
The second tube member 25 includes a second built-in end 251 and a second connecting end 253. The diameter of the second tube member 25 is larger than the diameter of the first tube member 23, and the second built-in end 251 can be connected to the first connection end 233 so as to expand and contract, and the second tube member 25 is connected to the first tube member 23. The first tube member 23 is accommodated in the second tube member 25. Thereby, the total length of the 1st tube member 23 and the 2nd tube member 25 can be shortened, and the convenience at the time of subsequent surgery operation increases. The fixed seat 27 is fixed to the second connecting end 253, and the airbag 29 is attached to the fixed seat 27.

As shown in FIGS. 2 to 3, 3 </ b> A, and 3 </ b> B, the fixed seat 27 is fixed to the second connecting end 253, and the fixed seat 27 has a passage 271, an inner edge wall 273, a guide groove 275, and a key groove 277. including. The passage 271 passes through the fixed seat 27 and is usually located at the center of the fixed seat 27. The inner edge wall 273 extends toward the passage 271 along the inner wall surface of the fixed seat 27 to form an arcuate protrusion. The guide groove 275 communicates with the passage 271 and is adjacent to the inner edge wall 273. Here, as shown in FIG. 3, the fixed seat 27 includes two inner edge walls 273 and two guide grooves 275, which are adjacent to each other. This is merely an example, and the present invention is not limited to this.
The key groove 277 is formed in the inner edge wall 273 and communicates with the guide groove 275. The key groove 277 has a width at one end far from the guide groove 275 smaller than one end near the guide groove 275. That is, the inner edge wall 273 protrudes toward the key groove 277 at one end far from the guide groove 275 of the key groove 277 to form a stop portion 2731.

As shown in FIG. 3A, the convex block 131 of the obturator 10 can enter the fixed seat 27 through the guide groove 275. At this time, the obturator 10 can be freely inserted into and removed from the fixed seat 27. it can.
As shown in FIG. 3B, when the obturator 10 is rotated, the convex block 131 enters the key groove 277 from the guide groove 275 and is continuously slid to cause the convex block 131 to stop the inner edge wall 273. When it comes into contact with 2731, the rotation cannot be continued any further. At this time, the obturator 10 and the fixed seat 27 are fixed. The obturator 10 can be moved along the longitudinal direction of the puncture portion 13 by moving the sleeve 20. When the obturator 10 is rotated to return the convex block 131 to the guide groove 275, the obturator 10 can be taken out freely.

As shown in FIG. 4, a part of the puncture unit 13 is located in the built-in passage 2131, the first tube member 23, the second tube member 25, and the passage 271. The sharp end 133 protrudes from the fixed seat 27. After the obturator 10 has made a hole in the human body 500, the obturator 10 is moved along the longitudinal direction of the puncture unit 13 by moving the sleeve 20 in a state of being fixed to the fixed seat 27. Can do.
Furthermore, as shown in FIG. 5, after reaching an appropriate position, the first air valve 215 is filled with gas, and the airbag 29 is inflated, and then the sleeve 20 can be fixed to the human body 500. At this time, the obturator 10 can be rotated and taken out from the sleeve 20.

FIG. 6 is a partial cross-sectional view of the sleeve of FIG. 5, and the gas flow method will be described in detail here. As shown in FIG. 6 (refer to FIGS. 2, 4, and 5 at the same time), the first tube member 23 further includes a first inner tube 241 and a first outer tube 243. The first tube member 23 is divided into a first tube wall area 23A and a second tube wall area 23B. In the first tube wall area 23A, the first outer tube 243 surrounds the first inner tube 241. In the second tube wall area 23B, the first outer tube 243 does not surround the first inner tube 241. The second tube member 25 includes a second inner tube 261 and a second outer tube 263. The second tube member 25 is divided into a third tube wall area 25A and a fourth tube wall area 25B. In the third tube wall section 25A, the second outer tube 263 surrounds the first outer tube 243. In the fourth outer tube wall section 25B, the second outer tube 263 surrounds the second inner tube 261.
A first opening 2331 is opened in the tube wall of the first outer tube 243. The fixed seat 27 includes an air supply port 279. Here, between the first inner tube 241 and the first outer tube 243, between the first opening 2331, between the first outer tube 243 and the second outer tube 263, between the second outer tube 263 and the second inner tube 261, And the air supply port 279 is communicated to form an air flow passage. When the gas is introduced from the first air valve 215, it flows along the airflow passage, finally enters the airbag 29 via the air supply port 279, and the airbag 29 is filled with the gas. The sleeve 20 can be fixed in the human body 500.

  As shown in FIG. 7, when the positioning of the trocar 1 is completed, the airbag 29 is filled with gas, and the sleeve 20 is fixed in the human body 500, after the obturator 10 is taken out from the sleeve 20, the grip portion The first tube member 23 is accommodated in the second tube member 25 with 211, and the total length outside the human body 500 is shortened. When the sleeve 20 contracts, the second tube member 25 is moved toward the seal seat 21 relative to the first tube member 23, and the first tube member 23 is accommodated in the second tube member 25.

  More specifically, as shown in FIGS. 2 and 4 to 7, the trocar 1 further includes an airtight unit 30, and the airtight unit 30 is located at a connection portion between the first tube member 23 and the second tube member 25. To do. The airtight unit 30 includes a stopper 31 and an airtight cover tube 33. The stopper 31 is incorporated near the first connecting end 233 on the first tube member 23. The hermetic cover tube 33 is attached to the connecting portion of the first tube member 23 and the second tube member 25, and the hermetic cover tube 33 covers the stopper 31, so that no gas leaks from the gap between the connecting portions. Like that.

As shown in FIGS. 4 to 6, when the sleeve 20 is stretched, the second tube member 25 is moved away from the seal seat 21 relative to the first tube member 23 when the sleeve 20 is stretched. The two tube members 25 can be extended until they come into contact. More specifically, after the stopper 31 and the tube wall of the second outer tube 263 come into contact, the second tube member 25 is not moved any further in the direction away from the seal seat 21.
As shown in FIG. 7, when the sleeve 20 is contracted from the stretched state, the second tube member 25 is moved in the direction of the seal seat 21 relative to the first tube member 23, and the first tube member 23 is moved. Is accommodated in the second tube member 25, and the movement is stopped when the airtight unit 30 and the connecting portion 213 come into contact with each other.

  Reference is again made to FIGS. 2 and 4 to 7. The airtight unit 30 further includes an airtight ring 35, which is attached to a part of the first tube member 23, contacts the stopper 31, and the airtight ring 35 is covered in the airtight cover tube 33. This achieves a further airtight effect. In addition, the stopper 31 may be a screw-type fastening member. When the first tube member 23 is accommodated in the second tube member 25, the stopper 31 can be more firmly connected so that it does not fall off.

Reference is again made to FIGS. 2 and 4 to 7. The seal seat 21 further includes a second air valve 217. After the obturator 10 is taken out from the sleeve 20, the gas from the second air valve 17 passes through the first tube member 23 and the second tube member 25, that is, along the position where the obturator 10 is installed. It fills the human body 500 and locally expands the tissue of the human body, facilitating the subsequent insertion, observation, and surgical operation of medical devices such as endoscopes, optical fibers, and lasers.
More specifically, the second air valve 217 is a gas on-off valve and can be connected to an external gas device to perform gas filling. Further, after the operation is completed, the first air valve 215 is opened to leak the gas in the airbag 29, and the sleeve 20 is taken out from the human body.

In the trocar sleeve presented in the above-mentioned embodiment, the convex block of the obturator and the fixed seat of the sleeve are mainly fixed by the keyway, and thereby the obturator and the sleeve are moved in the axial direction in synchronization with each other. It can be adjusted to the most appropriate position, avoiding repeated destructive intrusions, preventing contact, reducing wound enlargement and increasing patient pain and discomfort.
In addition, since the first tube member and the second tube member are connected and the first tube member can be accommodated in the second tube member, the length of the sleeve can be expanded and contracted, and the length outside the human body. Shortening and making it easier for medical staff to operate.

  The above description is merely the best embodiment of the present invention, and does not limit the present invention. Other modifications or substitutions of equivalent effects completed without departing from the gist disclosed by the present invention are included in the scope of claims described below.

DESCRIPTION OF SYMBOLS 1 Trocar 10 Obturator 11 Seat part 13 Puncture part 131 Convex block 133 Pointed end 20 Sleeve 21 Seal seat body 211 Grip part 2111 Opening 213 Connecting part 2131 Built-in passage 215 First air valve 217 Second air valve 23 First tube member 231 1st built-in end 233 1st connection end 2331 1st opening 23A 1st pipe wall area 23B 2nd pipe wall area 241 1st inner pipe 243 1st outer pipe 25 2nd tube member 251 2nd built-in end 253 2nd Connection end 25A Third tube wall section 25B Fourth tube wall section 261 Second inner pipe 263 Second outer pipe 27 Fixed seat 271 Channel 273 Inner edge wall 2731 Stopping portion 275 Guide groove 277 Key groove 279 Air supply port 29 Air bag 30 Airtight unit 31 Stopper 33 Airtight cover tube 35 Airtight ring 500 Human body

Claims (10)

A trocar,
Including an obturator and a sleeve,
The obturator includes a seat portion and a puncture portion, the puncture portion extends in a direction perpendicular to the seat portion, and the puncture portion includes a convex block and a sharp end, and the sharp end is the puncture point Located at the other end of the part opposite the seat part, the convex block is extended radially from the outer surface of the puncture part,
The sleeve includes a seal seat, a first tube member, a second tube member, a fixed seat, and an airbag;
The seal seat includes a grip portion, a connecting portion, and a first air valve, the grip portion includes an opening, the puncture portion is inserted from the opening, the seat portion contacts the grip portion, A connecting portion that extends from the grip portion and includes a built-in passage, the built-in passage communicates with the opening, and the first air valve is connected to the connecting portion ;
Wherein the first tube member, a first embedded end, includes a first connecting end, the first Kumikomitan said integrated into embedded passage, and the first Kumikomitan of the first air valve An air flow communicates , and at least one first opening is formed on the tube wall of the first connection end;
The second tube member includes a second built-in end and a second connecting end, and the second built-in end is connected to the first connecting end so as to be extendable and contracted, and the second tube member is connected to the first connecting end. Shrinkable with respect to the tube member, the first tube member can be accommodated in the second tube member,
The fixed seat is fixed to the second connecting end, and includes a passage, an inner edge wall, a guide groove, a key groove, and an air supply port. The passage penetrates the fixed seat, and the inner edge wall Is extended toward the passage along the inner wall surface of the fixed seat, the guide groove and the passage communicate with each other, and are adjacent to the inner edge wall, and the key groove is formed in the inner edge wall. And the width of one end far from the guide groove of the key groove is smaller than the width of one end near the guide groove, and the air supply port is opened on the surface of the fixed seat, A part of the puncture portion is located in the built-in passage, the first tube member, the second tube member, and the passage, and the sharp end protrudes from the fixed seat,
The airbag is attached to the fixed seat, and the air supply port and the air flow communicate with each other ;
After the convex block of the obturator enters the key groove from the guide groove, the convex block is slid along the key groove and brought into contact with the inner edge wall. The tutor and the fixed seat are fixed, and the obturator moves the sleeve to move along the long axis direction of the obturator.
Trocar.   The first tube member further includes a first inner tube and a first outer tube, and the first tube member is divided into a first tube wall region and a second tube wall region, the first tube wall region The first outer tube surrounds the first inner tube, and in the second tube wall area, the first outer tube does not surround the first inner tube, and the second tube member is second An inner tube and a second outer tube, and the second tube member is divided into a third tube wall region and a fourth tube wall region, wherein the second outer tube is the second tube. 1 surrounding the outer tube, and in the fourth tube wall area, the second outer tube wall surrounds the second inner tube, and the first opening is opened in the tube wall of the first outer tube. The trocar of Claim 1 characterized by the above-mentioned.   Between the first inner tube and the first outer tube, the first opening, between the first outer tube and the second outer tube, between the second outer tube and the second inner tube, and The air supply port is communicated to form an air flow passage, and after the gas enters from the first air valve, the gas flows along the air flow passage and enters the airbag through the air supply port. The trocar according to claim 2, characterized in that it is characteristic.   The airtight unit further includes an airtight unit, the airtight unit is installed on a part of the first tube member and the second tube member, and seals a connection portion of the first tube member and the second tube member. The trocar according to claim 1.   The airtight unit includes a stopper and an airtight cover tube, the stopper is incorporated near the front first connecting end on the front first tube member, and the front airtight cover tube is formed of the front first tube member and the front second tube member. The trocar according to claim 4, wherein the trocar is attached to the connecting portion of the hood and the front airtight cover tube covers the front stopper.   The airtight unit further includes an airtight ring, the airtight ring is attached to a part of the first tube member, contacts the stopper, and the airtight ring is covered in the airtight cover tube. The trocar according to claim 5, characterized by.   When the sleeve is stretched, the second tube member is moved in a direction away from the seal seat relative to the first tube member, and is extendable until the stopper and the second tube member are in contact with each other. The trocar according to claim 5, characterized by.   When the sleeve is contracted, the second tube member is moved in the direction of the seal seat relative to the first tube member, the first tube member is accommodated in the second tube member, and the airtight unit The trocar according to claim 4, wherein the trocar can contract until the connecting portion comes into contact with the trocar.   5. The method according to claim 4, wherein the hermetic unit further includes a fastening member, and the fastening member is incorporated in the first connection end and contacts an inner wall of the second inner pipe. Trocar.   2. The trocar according to claim 1, wherein when the convex block is returned from the key groove to the guide groove, the obturator can be freely retracted from the inside of the sleeve. 3.

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