CN113117218A

CN113117218A - Guide sheath

Info

Publication number: CN113117218A
Application number: CN202110423788.7A
Authority: CN
Inventors: 林振德; 龚敏丽
Original assignee: Suzhou Anjun Precision Plastic Pipe Industry Co ltd
Current assignee: Suzhou Anjun Precision Plastic Pipe Industry Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-07-16

Abstract

The invention provides a guide sheath, which comprises a sheath tube, an expander and a hemostatic valve, wherein the hemostatic valve is movably connected to the end part of the sheath tube, the expander penetrates through the hemostatic valve and is inserted into the sheath tube, the end part of the sheath tube is provided with a first connecting piece, the hemostatic valve comprises an insertion end, the side wall of the insertion end is provided with a water inlet tube, the water inlet tube is provided with a three-way valve, the insertion end is integrally formed with a second connecting piece, and the second connecting piece is in threaded connection with the first connecting piece and is in sealed conduction; the lubricating layer on the outer wall of the sheath tube has a clearance range, so that the friction force at the skin mouth part is large after the sheath tube is inserted into a corresponding position in actual operation, and the sheath tube is convenient to control; the connection between the dilating tube and the hemostatic valve is more stable.

Description

Guide sheath

Technical Field

The invention relates to the field of medical appliances, in particular to an introducer sheath.

Background

In recent medical treatment, various types of treatment and examination are performed using a medical instrument in the form of a long, thin, hollow tube called a catheter (catheter). As such a treatment method, there are a method of directly administering a drug to an affected part using the long characteristics of a catheter, a method of dilating a stenosed part in a body lumen using a catheter having a balloon expandable by pressurization attached to the tip thereof, a method of cutting and opening an affected part using a catheter having a cutter attached to the tip thereof, and a method of placing a plug in an aneurysm, a bleeding part, or a nutrient blood vessel using a catheter and sealing the same. In addition, there is a treatment method in which a stent formed in a tubular shape having a mesh-like side surface is embedded in a body lumen using a catheter and left in the body lumen in order to maintain an open state of a stenotic portion in the body lumen. Further, there is a method of sucking excess fluid from an organ in the body.

The existing guide sheath has the following publication numbers: the three-way stopcock of the introducer sheath disclosed in the patent of CN 104220122B is fixedly connected, and is not easy to operate and has low flexibility when the connection tube needs to be adjusted, and in combination with the prior art, the introducer has the following disadvantages: 1. after the guide sheath is inserted, the hemostatic valve part of the guide sheath is not transparent, and if the affected part has thrombus, the thrombus cannot be observed; 2. when flushing and exhausting, whether bubbles remain in the water tank cannot be observed; 3. the surface of the existing expansion pipe is provided with a lubricating layer, but in actual operation, the part inserted into the skin and the blood vessel needs to be lubricated, and when the whole body is lubricated completely, the inserted part of the skin is not easy to fix and is easy to slide out.

Disclosure of Invention

In order to solve the technical problem, the invention provides a guide sheath which comprises a sheath tube, an expander and a hemostasis valve, wherein the hemostasis valve is movably connected to the end part of the sheath tube, the expander penetrates through the hemostasis valve and is inserted into the sheath tube, the end part of the sheath tube is provided with a first connecting piece, the hemostasis valve comprises an insertion end, the side wall of the insertion end is provided with a water inlet pipe, the water inlet pipe is provided with a three-way valve, the insertion end is integrally formed with a second connecting piece, and the second connecting piece is in threaded connection with the first connecting piece and is in sealed conduction.

Preferably, the end of the sheath tube is provided with a developing ring.

Preferably, the dilator comprises a handheld portion, a clamping piece is arranged at the lower portion of the handheld portion, and the clamping piece presses on the insertion end and is clamped with the insertion end.

Preferably, the clamping piece comprises at least 3 clamping pins which are annularly arranged, the inner walls of the clamping pins are provided with convex blocks, and the outer wall of the insertion end is provided with an annular convex rib.

Preferably, a silica gel sealing ring is arranged in the insertion end.

Preferably, the end part of the sheath tube is provided with a lubricating layer, and the lubricating layer accounts for 50% -70% of the length of the sheath tube.

Preferably, the hemostatic valve, the first connecting piece and the second connecting piece are made of transparent materials.

Preferably, the second connecting piece is of a hollow structure, and the outer wall of the end part is provided with a screw thread.

Preferably, the first connecting piece comprises an outer tube body, an internal thread is arranged on the inner wall of the outer tube body, an inserting tube is arranged in the outer tube body, the inserting tube is inserted into the first connecting piece, and the internal thread is screwed with the thread of the first connecting piece.

The guide sheath provided by the invention has the following beneficial effects: 1. the guide sheath uses the hemostatic valve, the first connecting piece and the second connecting piece which are made of transparent materials, when the guide sheath is used, if thrombus exists, the thrombus condition can be observed when the dilation tube is pulled out, and in addition, the transparent materials are also helpful for observing whether bubbles exist during flushing, so that gas is prevented from entering blood vessels; 2. the lubricating layer on the outer wall of the sheath tube has a clearance range, so that the friction force at the skin mouth part is large after the sheath tube is inserted into a corresponding position in actual operation, and the sheath tube is convenient to control; 3. the connection between the dilating tube and the hemostatic valve is more stable.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.

FIG. 1 is a schematic view of the dilator of the present invention;

FIG. 2 is a schematic view of a sheath and hemostatic valve of the present invention;

FIG. 3 is an assembled view of the present invention;

FIG. 4 is a schematic view of a first connector of the present invention;

wherein, 1, a sheath tube; 2. a dilator; 3. a hemostatic valve; 4. a first connecting member; 5. a second connecting member; 6. an insertion end; 7. a water inlet pipe; 8. a hand-held portion; 9. clamping a pin; 10. a bump; 11. an annular rib; 12. a lubricating layer; 13. thread teeth; 14. an internal thread; 15. a three-way valve; 16. and inserting and combining the pipes.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 2 and 3, the invention provides a guiding sheath, which includes a sheath tube 1 and an expander 2, wherein a hemostatic valve 3 is movably connected to an end of the sheath tube 1, the expander 2 penetrates through the hemostatic valve 3 and is inserted into the sheath tube 1, a first connecting member 4 is arranged at an end of the sheath tube 1, the hemostatic valve 3 includes an insertion end 6, a water inlet pipe 7 is arranged on a side wall of the insertion end 6, a three-way valve 15 is arranged on the water inlet pipe 7, a second connecting member 5 is integrally formed on the insertion end 6, and the second connecting member 5 is in threaded connection with the first connecting member 4 and is in sealed conduction, specifically: second connecting piece 5 is hollow structure, and the tip is equipped with a thread 13, first connecting piece 4 includes outer body, outer body inner wall is equipped with internal thread 14, the internal pipe 16 that closes of inserting that is equipped with of outer body, insert close the pipe 16 insert in first connecting piece 4, just internal thread 14 with the thread 13 of first connecting piece 4 closes soon, when being connected sheath pipe 1 and hemostasis valve 3, only need insert second connecting piece 5 in the pipe 16 that closes of inserting of first connecting piece 4 to close a thread 13 of second connecting piece 5 soon in internal thread 14, in order to prevent to rotate excessively, lead to the pipe fitting rotating, set up a thread 13 in first connecting piece 4 outside, slightly rotate can fixed connection.

As shown in fig. 1, a developing ring is disposed at an end of the sheath tube 1, the dilator 2 is inserted into the sheath tube 1 from an insertion end 6 of the hemostatic valve 3 and extends out of the sheath tube 1, the dilator 2 includes a handheld portion 8, a engaging member is disposed at a lower portion of the handheld portion 8, the engaging member presses on the insertion end 6 and is engaged with the insertion end 6, a silicone sealing ring is disposed in the insertion end 6, an outer wall of the dilator 2 can be hermetically covered to prevent leakage during water injection, after the dilator 2 is inserted into a final position, the dilator is fixed by the engaging member, the engaging member includes at least 3 annularly arranged engaging legs 9, a protrusion 10 is disposed on an inner wall of the engaging leg 9, an annular protruding rib 11 is disposed on an outer wall of the insertion end 6, when the dilator 2 is pressed, the engaging leg 9 has a certain elasticity, and the engaging leg 9 can be engaged with the annular protruding rib 11 to achieve fixation, when, the clamping feet 9 can be taken down from the annular convex ribs 11 by pulling backwards.

As shown in fig. 2, the end of the sheath 1 is provided with the lubricating layer 12, the length of the sheath 1 occupied by the lubricating layer 12 is 50% -70%, the length of the lubricating layer 12 can be adjusted according to the use scene, when the sheath is opposite to some long sheaths, the length of the lubricating layer 12 is 70%, the lubricating layer 12 is used for being conveniently inserted into a tissue vessel without resistance, so that the tissue vessel can conveniently enter and flow, and after reaching a preset position, the sheath tube 1 needs larger friction at the position of entering the skin to prevent the sheath tube 1 from mistakenly sliding, so that the convenience of the operation is greatly improved.

In addition, to facilitate observing whether there are air bubbles during water injection to prevent the air bubbles from entering the blood vessel, the hemostatic valve 3, the first connector 4, and the second connector 5 are made of transparent materials, such as PEEK (polyether ether ketone), PEK (polyether ketone), PEKK (polyether ketone), PEEKK (polyether ether ketone), PPS (polyphenylene sulfide), PES (polyether sulfone), PSF (polysulfone), PI (polyimide), PEI (polyetherimide), PAR (amorphous polyaryl ester), and super engineering plastics derived therefrom, and the transparent materials are also more convenient to observe whether there is thrombus.

Claims

1. The utility model provides a guide sheath, its characterized in that, includes sheath pipe, expander, hemostasis valve swing joint in sheath pipe tip, the expander passes hemostasis valve and insert in the sheath is intraductal, sheath pipe tip is equipped with first connecting piece, the hemostasis valve is including inserting the end, it is equipped with the inlet tube to insert the end lateral wall, be equipped with the three-way valve on the inlet tube, integrated into one piece has the second connecting piece on inserting the end, the second connecting piece is with first connecting piece threaded connection and sealed the switching on.

2. The introducer sheath according to claim 1, wherein the sheath end is provided with a visualization ring.

3. An introducer sheath according to claim 1 or 2, wherein the dilator comprises a hand-held portion, and a catch member is provided at a lower portion of the hand-held portion, and presses against and engages with the insertion end.

4. The introducer sheath according to claim 3, wherein the engaging member comprises at least 3 engaging legs arranged in a ring shape, the engaging legs having a protrusion on an inner wall thereof and an annular rib on an outer wall of the insertion end thereof.

5. The introducer sheath of claim 1, wherein a silicone seal is disposed within the insertion end.

6. The introducer sheath according to claim 1, wherein the sheath end is provided with a lubricating layer, and the lubricating layer accounts for 50% -70% of the length of the sheath.

7. The introducer sheath of claim 1, wherein the hemostasis valve, first connector, and second connector are transparent.

8. The introducer sheath according to claim 1, wherein the second connector is hollow and has a thread on the outer wall of the end portion.

9. The guide sheath of claim 1, wherein the first connecting piece comprises an outer tube body, the inner wall of the outer tube body is provided with internal threads, an inserting tube is arranged in the outer tube body, the inserting tube is inserted into the first connecting piece, and the internal threads are screwed with the screw teeth of the first connecting piece.