CN114376775A

CN114376775A - Support extractor

Info

Publication number: CN114376775A
Application number: CN202210073441.9A
Authority: CN
Inventors: 马文聪; 杨建锋; 杨晶
Original assignee: Hangzhou First Peoples Hospital
Current assignee: Hangzhou First Peoples Hospital
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-04-22

Abstract

The invention discloses a stent extractor, and belongs to the field of medical instruments. A stent extractor comprises an operating handle, a guide wire operating part, a separation catheter, a support catheter and a stent extracting part; the outer surface of the operating handle is provided with a fixed operating part along the axial direction in a moving way; the guide wire operating part is arranged at the tail end of the operating handle, a guide wire hole for the guide wire to extend into and take out is arranged in the guide wire operating part, and the guide wire hole is simultaneously communicated with the separation catheter and the support catheter; the separation catheter is arranged in the guide wire operating part; the support taking-out part can be separated from the separation conduit through the front estimation operation part, so that the accommodation space is enlarged to facilitate the contact and the accommodation with the support, and meanwhile, the support taking-out part is wavy in the circumferential direction, so that the area of the support taking-out part capable of being in contact with the support is increased, the position of the support which is deviated and inclined is conveniently wrapped in a multi-surface plugging mode, and the support can be clamped and taken out more quickly.

Description

Support extractor

Technical Field

The invention relates to the field of medical equipment, in particular to a stent extractor.

Background

Endoscopic Retrograde Cholangiopancreatography (ERCP) is a technique in which a duodenoscope is inserted into the descending part of the duodenum to find the duodenal papilla, a contrast catheter is inserted into the opening of the papilla from a biopsy channel, and an x-ray radiography is performed after a contrast medium is injected to display the cholangiopancreatography and treat the biliary-pancreatic disease according to the contrast condition.

After ERCP and related operations are carried out due to biliary calculus and other biliary pancreatic diseases, a stent is often required to be placed, one end of the stent is kept outside an opening of a duodenal papilla, the stent placed in a biliary tract is required to be taken out after the stent is placed for a certain time, at this time, if the stent completely slides into the biliary tract or the pancreatic duct due to various reasons, the difficulty of taking out the stent in the biliary tract or the pancreatic duct is greatly increased, a suitable tool for taking out the stent is clinically unavailable, and if the stent cannot be taken out according to the set time, a patient may be exposed to the risk of taking out the stent by a surgical operation of opening the abdomen.

Disclosure of Invention

In view of the problems in the prior art, an object of the present invention is to provide a stent extractor, which can separate a stent extractor from a partition catheter by advancing an operation part, so as to enlarge an accommodation space for facilitating contact and accommodation with a stent, and which can increase an area where the stent extractor can contact the stent due to undulation of the stent extractor in a circumferential direction, thereby facilitating multi-surface plugging wrapping of the stent having a deviated position and an inclined position, and thus clamping and extracting the stent more rapidly.

In order to solve the above problems, the present invention adopts the following technical solutions.

A stent extractor comprises an operating handle, a guide wire operating part, a separation catheter, a support catheter and a stent extracting part; the outer surface of the operating handle is provided with a fixed operating part along the axial direction in a moving way; the guide wire operating part is arranged at the tail end of the operating handle, a guide wire hole for the guide wire to extend into and take out is arranged in the guide wire operating part, and the guide wire hole is simultaneously communicated with the separation catheter and the support catheter; the separation catheter is arranged in the guide wire operating part; the support catheter is arranged in the separation catheter, an operation channel for the guide wire to move is formed in the support catheter, two ends of the support catheter are respectively a support end and an operation end, and the operation end is connected with the fixed operation part; the support taking-out part is arranged at the operating end side of the support conduit, the support taking-out part is in a wavy shape which is fluctuated in the circumferential direction, and the support taking-out part has elastic deformation capacity, and when the fixed operating part is pushed forwards, the support taking-out part extends out of the separation conduit and gradually expands to enlarge the accommodating space required by collecting the support; when the fixed operation part is pulled backwards, the support taking-out part carries the support and retracts into the separation conduit.

Furthermore, the fixed operation part is provided with two finger holes for fingers to pass through and operate.

Furthermore, at least two extending pieces are annularly distributed on the side, close to the support taking-out part, of the support conduit, and one end of each extending piece is fixedly connected with the support taking-out part.

Further, the number of the extension pieces is three.

Further, the extension member has an elastic deformation capability toward the direction away from the axial direction of the support tube.

Furthermore, the extension piece and the support taking-out part are all made of steel wires.

Furthermore, the circumferential diameter of the accommodating space after the stent taking-out part is opened is at least 1.5 times larger than the diameter of the stent.

Further, the outer surface of the support extraction part is arc-shaped, or the cross section of the support extraction part is circular.

Furthermore, the outer surface of the operating handle is provided with scale marks.

Compared with the prior art, the invention has the advantages that:

when the support arranged in the biliary tract is taken out, the support taking-out part is separated from the separation catheter by the aid of the front estimation operation part, the support taking-out part is conveniently contacted with the support and accommodated in the accommodation space, and meanwhile, the support taking-out part is wavy in the circumferential direction, so that the contact area of the support taking-out part and the support is increased, the position of the support taking-out part is conveniently deviated, the inclined support is wrapped in a multi-surface plugging mode, and the support is clamped and taken out more quickly.

Second, the support extraction in this scheme compares with prior art, does not set up unnecessary part at support extraction and support contact jaw, can make support extraction break away from comfortable and make its final open accommodating space as big as possible to conveniently collect the support under the condition that the reduction causes the influence to the patient.

Thirdly, the operation passageway of support pipe in this scheme to and the accommodating space of support portion take out when accomodating in separating the pipe all can supply the seal wire to pass through, avoided in the operation process that the support was taken out, unable use seal wire stretches into the operation.

Drawings

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

FIG. 2 is a schematic perspective view of the internal structure of the present invention;

FIG. 3 is a schematic perspective view of the rack-out section according to the present invention;

FIG. 4 is a schematic diagram of a first perspective structure of the present invention;

FIG. 5 is a schematic diagram of a second perspective structure of the present invention;

FIG. 6 is a schematic view showing a first viewing angle process of the stent taken out from the biliary tract according to the present invention;

fig. 7 is a schematic view of a second viewing angle process of the stent taken out from the biliary tract according to the present invention.

The reference numbers in the figures illustrate:

an operating handle 1, a fixed operating part 11, a scale mark 12, a guide wire operating part 2, a guide wire hole 21, a separation catheter 3, a support catheter 4, an extension 5 and a stent removing part 6.

Detailed Description

Referring to fig. 1-5, a stent extractor comprises an operating handle 1, a guide wire operating part 2, a separation catheter 3, a support catheter 4 and a stent extractor 6; the outer surface of the operating handle 1 is provided with a fixed operating part 11 along the axial direction; the guide wire operating part 2 is arranged at the tail end of the operating handle 1, a guide wire hole 21 for the guide wire to extend in and take out is arranged in the guide wire operating part 2, and the guide wire hole 21 is simultaneously communicated with the separation catheter 3 and the support catheter 4; the separation catheter 3 is arranged in the guide wire operating part 2; the supporting catheter 4 is arranged in the separating catheter 3, an operation channel for the guide wire to move is formed in the supporting catheter 4, two ends of the supporting catheter 4 are a supporting end and an operating end respectively, and the operating end is connected with the fixed operating part 11; the stent taking-out part 6 is arranged at the operation end side of the support conduit 4, the stent taking-out part 6 is in a wavy shape which is fluctuated in the circumferential direction, and the stent taking-out part 6 has elastic deformation capacity, when the fixed operation part 11 is pushed forwards, the stent taking-out part 6 extends out of the separation conduit 3 and is gradually expanded, so that the accommodating space required by collecting the stent is expanded; when the fixed operation part 11 is pulled backward, the stent removing part 6 carries the stent and retracts into the partition guide tube 3. The fixed operation part 11 is provided with two finger holes for fingers to pass through and operate. The outer surface of the operating handle 1 is provided with scale marks 12.

Referring to fig. 3-5, at least two extending members 5 are annularly distributed on the side of the support conduit 4 close to the stent removing part 6, and one end of each extending member 5 is fixedly connected with the stent removing part 6. The number of extensions 5 is three. The spreader 5 has an elastic deformation capability in the axial direction away from the support tube 4. The extending piece 5 and the bracket taking-out part 6 both adopt steel wires. The circumferential diameter of the containing space after the stent taking-out part 6 is opened is at least 1.5 times larger than the diameter of the stent. The outer surface of the holder take-out part 6 is arc-shaped, or the cross section of the holder take-out part 6 is circular.

In the process of performing the stent retrieval operation, the doctor prepares for the operation by holding the sterilized operation handle 1 and putting fingers on the finger holes. The doctor finally extends the guide wire out of the support catheter 4 along the receiving space of the stent retrieval part 6 in the storage state by inserting the guide wire into the operation passage along the guide wire hole 21, so that the doctor can perform the operation conveniently.

Then, the doctor extends the separation conduit 3 into the bile duct, approaches the position of the stent (see fig. 6), and extends the extension piece 5 and the stent taking-out portion 6 out of the support conduit 4 by the front estimation operation portion 11, so that the support end of the support conduit 4 follows the track of the separation conduit 3, because of the elastic deformation capability of the extension piece 5 and the stent taking-out portion 6, the stent taking-out portion 6 is expanded towards the axial center direction away from the support conduit 4, the stent taking-out portion 6 is further driven to expand, so as to expand the accommodating space thereof to contact with the stent (see fig. 7), after the stent taking-out portion 6 contacts with the stent and successfully wraps the stent, the doctor gradually draws the stent taking-out portion 6 due to the elastic deformation capability thereof by the rear pulling operation portion 11, and the stent taking-out portion 6 can straighten the stent with different placing angles in the process to facilitate the stent to be drawn out, and the stent retrieval part 6 is moved with the stent and temporarily taken into the separation catheter 3 by the continuous pulling of the operation part 11 to achieve the retrieval of the stent from the patient.

Claims

1. A stent extractor, comprising: comprises an operating handle (1), a guide wire operating part (2), a separation catheter (3), a support catheter (4) and a stent taking-out part (6);

the outer surface of the operating handle (1) is provided with a fixed operating part (11) in a moving way along the axial direction;

the guide wire operating part (2) is arranged at the tail end of the operating handle (1), a guide wire hole (21) for the guide wire to stretch into and take out is formed in the guide wire operating part (2), and the guide wire hole (21) is communicated with the separation catheter (3) and the support catheter (4) at the same time;

the separation catheter (3) is arranged in the guide wire operating part (2);

the support catheter (4) is arranged in the separation catheter (3), an operation channel for moving the guide wire is formed in the support catheter (4), two ends of the support catheter (4) are respectively a support end and an operation end, and the operation end is connected with the fixed operation part (11);

the support taking-out part (6) is arranged at the operation end side of the support conduit (4), the support taking-out part (6) is in a wavy shape which is fluctuated in the circumferential direction, the support taking-out part (6) has elastic deformation capacity, and when the fixed operation part (11) is pushed forwards, the support taking-out part (6) extends out of the separation conduit (3) and is gradually opened, so that the accommodating space required by collecting the support is expanded; when the fixed operation part (11) is pulled backwards, the bracket taking-out part (6) carries the bracket and retracts into the separation conduit (3).

2. A stent extractor according to claim 1, wherein: the support catheter (4) is close to the side of the support taking-out part (6) and is annularly provided with at least two extending parts (5), and one end of each extending part (5) is fixedly connected with the support taking-out part (6).

3. A stent extractor according to claim 2, wherein: the extension piece (5) has elastic deformation capacity of keeping away from the axial direction of the support conduit (4).

4. A stent extractor according to claim 2, wherein: the extension piece (5) and the support taking-out part (6) both adopt steel wires.

5. A stent extractor according to claim 1, wherein: the circumferential diameter of the accommodating space after the stent taking-out part (6) is opened is at least 1.5 times larger than the diameter of the stent.

6. A stent extractor according to claim 1, wherein: the outer surface of the support taking-out part (6) is arc-shaped, or the cross section of the support taking-out part (6) is circular.

7. A stent extractor according to claim 1, wherein: the outer surface of the operating handle (1) is provided with scale marks (12).