CN206612866U - A kind of new Recyclable biliary stent induction system - Google Patents

Abstract

A kind of new Recyclable biliary stent induction system, it includes orientation direction head (1), core pipe (2), recovery set (3), middle pipe (4), outer sheath (5), sheath crimping nut (6), big handle (7), middle pipe stainless steel tube (8), miniature lever (9), and the orientation direction head is linked together with core pipe by the cylindrical boss integral molded plastic of core pipe termination；The recovery set hangs biliary tract rack afterbody mesh by the hook claw hook of hook portion cylinder front end, and the recovery set hangs biliary tract rack afterbody mesh by the hook claw hook of hook portion cylinder front end, biliary tract rack is reclaimed in outer sheath；Outer sheath is crimped on big handle by the outer sheath crimping nut by inner conical surface.The frictionally of changing over withdraws the mode of support, withdraws power when the push power and support when reducing intervention operation medium-height trestle release are reclaimed, being more accurately positioned for biliary tract rack can be achieved, while greatly reducing the risk that induction system core pipe is pulled or broken.

Description

A kind of new Recyclable biliary stent induction system

Technical field

The utility model is related to technical field of medical instruments, belongs to and is accurately positioned in a kind of intervention operation for biliary tract rack And recyclable induction system.

Background technology

Biliary tract prosthesis implantation is gradually widely used in clinic with its minimal invasive and curative effect certainly, is that current operation can not be cut The Main Means of the malignant obstructive jaundice palliative treatment removed.Operation has two ways, i.e., planted through endoscopic retrograde pancreatic duct support Enter (ERCP) and percutaneous transhepatic puncture biliary tract prosthesis implantation (PTCD).In general, Gastroenterology dept. doctor more more options ERCP support Method for implantation, wound is smaller, recovery is fast；Invasive Technology Department doctor more more options PTCD, it is acceptable good, it is especially suitable for because of duodenum The intransitable patient of scope caused by obstruction and other reasonses.

In interventional procedure, when biliary tract rack discharge a part when find support off-position need adjustment or When the specification of support is improper, biliary tract rack is withdrawn in outer sheath again using the retracting device of induction system, it is to be adjusted Again the support changed be dimensioned in vitro is discharged or withdrawn from behind the position of good induction system.

The retracting device of biliary tract induction system in the market is all that one section of recovery set 01 (Fig. 1) is fixed in core pipe, When recovery set is not pushed out outer sheath, biliary tract rack near-end is still tied between sheath and core pipe (Fig. 2), because reclaiming dress Put external diameter bigger than core pipe, therefore outer sheath chokes this section of biliary tract rack together with recovery set, when withdrawing core pipe, biliary tract rack can It is recovered in outer sheath.As can be seen here, traditional retracting device is by support by the frictional resistance between support and recovery set Outer sheath is taken back, recovery set can not be too thin, and otherwise support can not enough be slipped because of the frictional force with reclaiming inner room, and can not be returned Set is received to take back in outer sheath.Power is pushed when this allows for discharging and reclaims support and power is withdrawn than larger, understands too big because pushing power And being difficult to control causes support front jumping to shift and influences release precision；Resistance is too big simultaneously can also be strong to the parts of induction system Degree and bulk strength propose requirements at the higher level, when resistance is too big, also core pipe can be broken or be pulled, greater risk is brought to operation.

In view of the above-mentioned problems, devising a kind of new Recyclable biliary stent induction system, biliary tract rack recovery is changed Principle, greatly reduce the risk that induction system core pipe is pulled or broken.

Utility model content

The purpose of this utility model is to provide a kind of induction system of new Recyclable biliary stent, and it reduces intervention hand Power is withdrawn when push power and support when art medium-height trestle discharges are reclaimed, being more accurately positioned for biliary tract rack can be achieved, while greatly Reduce the risk that induction system core pipe is pulled or broken greatly.

To achieve these goals, the utility model uses following technical scheme：

A kind of new Recyclable biliary stent induction system, it include orientation direction head (1), core pipe (2), recovery set (3), Middle pipe (4), outer sheath (5), sheath crimping nut (6), big handle (7), middle pipe stainless steel tube (8), miniature lever (9), it is described fixed Position seeker is linked together with core pipe by the cylindrical boss integral molded plastic of core pipe termination；The recovery set passes through hook portion The hook claw hook of cylinder front end hangs biliary tract rack afterbody mesh, and biliary tract rack is reclaimed in outer sheath；The outer sheath crimps spiral shell Outer sheath is crimped on big handle by mother by inner conical surface.

Wherein, orientation direction head is made up of the conical section of front end and the cylindrical portion of rear end, is completed rear conical section and is located at Outside outer sheath, cylindrical portion is located in outer sheath, coordinates with outer sheath for gap；There is step-like hole inside orientation direction head, be used for It is connected with core pipe and by seal wire, orientation direction head is made up of PEBAX or PU medical macromolecular materials.

Wherein, core pipe (2) is a light-wall pipe, and ips are 0.9-1mm, and pipe wall thickness is 0.1-0.3mm, pipe front end There is a cylindrical boss (10), core pipe (2) uses integrated injection with orientation direction head (1) by cylindrical boss in core pipe (10) Modeling mode links together, and can effectively prevent that orientation direction head is pulled from core pipe in operating process, core pipe material be PEEK, PI, HDPE medical macromolecular materials.

Wherein, recovery set includes hook portion (11), pushing part (12), connecting portion (13), and hook portion (11) are located at hook portion On the front end of cylinder is cylindrical, hook portion cylinder rear end connection pushing part (12), pushing part (12) rear end connection connecting portion (13) is returned Receiving in set has through hole (22).

Wherein, 2~6 hook pawls are uniform-distribution with the cylinder of hook portion cylinder, for uniformly hooking biliary tract rack tail Hold 2~6 mesh.

Wherein, (12 be cylinder to pushing part, and its left side is used to withstand support tail end when discharging biliary tract rack and be pushed away Outer sheath (5) is sent out, its right side abuts middle pipe (4) left side；There is a chamfering right side, makes recovery set Guan Shineng in withdrawing Smoothly enter in sheath.

Wherein, there is screw thread outside connecting portion (13), be connected by screw thread with middle pipe left end internal thread.

Wherein, recovery set is connected by through hole with core pipe；Hook pawl outermost diameter and be slightly less than pushing part diameter, push up Pushed section right-hand member has a chamfering, this at two design ensure that recovery set can smoothly enter when withdrawing middle pipe and core pipe in surgical procedure In sheath.

Wherein, recovery set is medical stainless steel, is developed under X-ray, to identify system into the position of biliary tract rack during human body Put.

Wherein, there are one section of internal thread and one section of inner conical surface inside sheath crimping nut (6)；Outside internal thread and big handle left end Screw thread coordinates, and the male cone (strobilus masculinus) of inner conical surface and outer sheath conical section coordinates；Bushing is made up of conical section and cylindrical section, inside there is through hole, Can pass freely through middle pipe (4)；The cooperation of nut and bushing is crimped by sheath, sheath and big handle are fastened on one Rise.

The beneficial effects of the utility model are：

(1) there is step-like hole inside orientation direction head, there are a cylindrical boss, core pipe and orientation direction in the core pipe front end Head is linked together by core pipe convex platform using integral molded plastic, can effectively prevent that orientation direction head is from core pipe in operating process Pull.

(2) recovery set is made up of hook pawl, pushing part, connecting portion, inside there is through hole.2- is uniform-distribution with hook portion cylinder 6 hook pawls, for hooking biliary tract rack tail end；Pushing part is cylinder, and its left side is used to withstand when discharging biliary tract rack Support tail end is simultaneously pushed out outer sheath, and its right side abuts middle pipe left side；There is screw thread outside connecting portion, by screw thread with Pipe is connected；Recovery set is connected by central through hole with core pipe.Hook portion outermost diameter is slightly less than pushing part diameter, Pushing part right-hand member has a chamfering, and this is when design guarantee releases rack restoring core pipe at two, and recovery set can smoothly enter sheath It is interior.Recovery set is medical stainless steel (SUS304, SUS304L, SUS316, SUS316L) so that it has simultaneously develops under X-ray Function, to identify system into the position of biliary tract rack during human body.

(3) outer sheath afterbody has a conical section, and sheath crimping nut has one section of inner conical surface, and bushing has one section of male cone (strobilus masculinus), three Individual frustoconical bevel angle is identical, and sheath crimping nut coordinates together with bushing is fastened on one by outer sheath and big handle, and rises Arrive to the sealed effect in junction.

Brief description of the drawings

Fig. 1 is like product retracting device schematic diagram.

Fig. 2 is that like product support reclaims schematic diagram.

Fig. 3 is assembling schematic diagram of the present utility model.

Fig. 4 is orientation direction head and core pipe connection diagram in the utility model.

Fig. 5 is recovery set schematic diagram in the utility model.

Fig. 6 is recovery set connection diagram in the utility model.

Fig. 7 is outer sheath structural representation in the utility model.

Fig. 8 is outer sheath and big handle connection diagram in the utility model.

Fig. 9 is bushing schematic diagram in the utility model.

Figure 10 is sheath crimping nut schematic diagram in the utility model.

Figure 11 is schematic diagram before the release of the utility model support.

Figure 12 is schematic diagram in the release of the utility model support.

Figure 13 is schematic diagram after the release of the utility model support.

Reference：

(1) orientation direction head

(2) core pipe

(3) recovery set

(4) managed in

(5) outer sheath

(6) sheath crimping nut

(7) big handle

(8) pipe stainless steel tube in

(9) miniature lever

(10) boss

(11) hook portion

(12) pushing part

(13) connecting portion

(14) PTFE tube

(15) metal webmaster

(16) PEBAX is managed

(17) conical section

(18) bushing

(19) conical section

(20) cylindrical section

(21) through hole

(22) through hole

Embodiment

Below in conjunction with the accompanying drawings, the utility model is elaborated.

The new Recyclable biliary stent induction system (see Fig. 3), by orientation direction first 1, core pipe 2, recovery set 3, in Pipe 4, outer sheath 5, sheath crimping nut 6, big handle 7, middle pipe stainless steel tube 8, miniature lever 9 are constituted.

The orientation direction first 1 (see Fig. 4) is made up of the conical section of front end and the cylindrical portion of rear end, and conical section is located at epitheca Pipe is outer, and cylindrical portion can enter in outer sheath；There is step-like hole inside, for being connected with core pipe and by seal wire.Orientation direction head It is made up of medical macromolecular materials such as PEBAX.

The core pipe 2 is a light-wall pipe (see Fig. 4), and ips are 0.9~1mm, and pipe wall thickness is 0.1~0.3mm, pipe There is a cylindrical boss 10 sub- front end, and core pipe is connected to one by core pipe convex platform 10 with orientation direction head using integral molded plastic Rise, can effectively prevent that orientation direction head is pulled from core pipe in operating process.Core pipe material is the medical macromolecular materials such as PEEK.

The recovery set 3 (see Fig. 5, Fig. 6) is made up of hook portion 11, pushing part 12, connecting portion 13, inside there is through hole 22.Hook 2~6 hook pawls are uniform-distribution with extension portion cylinder, for hooking biliary tract rack tail end；Pushing part is cylinder, its left side Support tail end is withstood during biliary tract rack and it is pushed out outer sheath for discharging, its right side abuts the middle left side of pipe 4；Connection There is screw thread outside portion 13, be connected by screw thread with middle pipe；Recovery set 3 is connected by through hole 22 with core pipe 2.Hook portion Outermost diameter is slightly less than pushing part diameter, and pushing part right-hand member has a chamfering, this at two design guarantee release rack restoring core Guan Shi, recovery set smoothly can enter in sheath.Recovery set 3 be medical stainless steel (SUS304, SUS304L, SUS316, SUS316L) so that it has developing function under X-ray simultaneously, with identify system into human body when biliary tract rack position.

The middle pipe 4 is hollow tube, and material is that medical grade plastic (HDPE or PEBAX) its left end endoporus has spiral shell in one section Line, is connected with the external screw thread of recovery set connecting portion 13, pipe stainless steel tube 8 and is connected in right-hand member overcoat with miniature lever 9.Core pipe 2 Run through the whole story in the mesopore of middle pipe 4, and be bonded as one by binding agent with middle pipe.

The outer sheath 5 is formed (see Fig. 7) by trilaminate material heat seal, and internal layer is PTFE tube 14, and middle level is stainless steel round wire Or the metal webmaster 15 of flat filament braiding, outer layer is PEBAX pipes 16.Such a structure can improve the axial tensile strength of sheath, Cause support positioning inaccurate so as to induction system axial elongation when being prevented effectively from push support.Outer sheath tail end is conical section 17 Conical section 19 on (see Fig. 8), with bushing 18 coordinates.

The big handle 7 is PC materials, and its left end has an external screw thread to crimp the screw-internal thread fit of nut 6 with sheath.

There are one section of internal thread and an one section of inner conical surface in sheath crimping nut 6 (see Fig. 8, Figure 10), inside, internal thread with it is big The left end external screw thread of handle 7 coordinates, and the male cone (strobilus masculinus) of inner conical surface and outer sheath conical section 17 coordinates.Material is the doctor such as ABS, PVC, PC Use level high polymer material.

The bushing 18 (see Fig. 9) is made up of conical section 19 and cylindrical section 20.Inside there is through hole 21, middle pipe can be made freely to lead to Cross.The cooperation of nut 6 and bushing 18 is crimped by sheath, sheath is connected and fixed with big handle.

The middle pipe stainless steel tube 8 (see Fig. 3), is one section of stainless steel tube for being placed on the middle afterbody of pipe 4.It passes through interference fit Or bonding way is connected with middle pipe 4 and is integrated, and adds the rigidity of middle pipe afterbody, pipe pushes away in can improving when discharging support Send performance.

There is a stepped hole in the middle of the miniature lever 9 (see Fig. 3), for being connected with middle pipe and passing through seal wire.

The detailed example embodiment of following discloses.However, concrete structure disclosed herein and function detail merely for the sake of The purpose of example embodiment is described.

It should be understood that the utility model is not limited to disclosed particular exemplary embodiment, but covering falls into disclosure model Enclose interior all modifications, equivalent and alternative.In the description to whole accompanying drawings, identical reference represents identical member Part.Now exemplified by biliary tract rack induction system when recovery set hook portion there are 3 hook pawls, implementation process is described in detail.

The loading of biliary tract rack is completed first.Miniature lever is pushed, middle pipe and core pipe are pushed out outer sheath, until recovery set It is completely exposed to outer sheath.By biliary tract rack be afterbody last row mesh in 3 equally distributed mesh of circumference hook respectively 3 in recovery set hook on pawl, while pressure is held and fills in epitheca paragraph by paragraph together with core pipe by tail end by biliary tract rack Pipe, until biliary tract rack entirety and orientation direction head cylindrical portion are fully inserted into outer sheath, biliary tract rack is loaded and finished (see Figure 11).

During intervention operation, new Recyclable biliary stent induction system is pushed to predetermined position along seal wire, big hand is unclamped Handle locknut, it is motionless to hold miniature lever, big handle of dropping back, then biliary tract rack is gradually released and opened up out of sheath since head end Open.Before recovery set exposes outer sheath, support tail end is compressed in outer sheath and is hooked on hook pawl (see figure all the time 12), if now finding, support off-position is inaccurate or selected support specification is improper, and it is motionless to hold big handle, delays Slowly miniature lever is withdrawn, then pipe and core pipe retract into outer sheath during miniature lever drives, because recovery set is connected and fixed with middle pipe And hook claw hook hangs support tail end on recovery set, so, withdrawing miniature lever can gradually withdraw biliary tract rack in outer sheath. Backing positions can be readjusted afterwards to discharge again, or system is withdrawn from into external change is mounted with appropriate size biliary tract rack Induction system discharges again, and Figure 13 is the schematic diagram after biliary tract rack is completely released.Make a general survey of whole visible, the utility model can Realization is accurately positioned release to biliary tract rack.

Claims (10)

1. a kind of new Recyclable biliary stent induction system, it is characterised in that it include orientation direction head (1), core pipe (2), Recovery set (3), middle pipe (4), outer sheath (5), sheath crimping nut (6), big handle (7), middle pipe stainless steel tube (8), miniature lever (9), the orientation direction head is linked together with core pipe by the cylindrical boss integral molded plastic of core pipe termination；The recovery set Biliary tract rack afterbody mesh is hung by the hook claw hook of hook portion cylinder front end, biliary tract rack is reclaimed in outer sheath；It is described outer Outer sheath is crimped on big handle by sheath crimping nut by inner conical surface.

2. new Recyclable biliary stent induction system according to claim 1, it is characterised in that orientation direction head is by preceding The conical section at end and the cylindrical portion composition of rear end, are completed rear conical section outside outer sheath, cylindrical portion is located in outer sheath, Coordinate with outer sheath for gap；There is step-like hole inside orientation direction head, for being connected with core pipe and by seal wire, orientation direction Head is made up of PEBAX or PU medical macromolecular materials.

3. new Recyclable biliary stent induction system according to claim 1, it is characterised in that core pipe (2) is one thin Wall pipe, ips are 0.9-1mm, and pipe wall thickness is 0.1-0.3mm, and there are a cylindrical boss (10), core pipe (2) in pipe front end Linked together, can effectively prevented using integral molded plastic mode by cylindrical boss in core pipe (10) with orientation direction head (1) Orientation direction head is pulled from core pipe in operating process, and core pipe material is PEEK, PI, HDPE medical macromolecular materials.

4. new Recyclable biliary stent induction system according to claim 1, it is characterised in that recovery set includes hooking Portion (11), pushing part (12), connecting portion (13), hook portion (11) be located at hook portion cylinder front end it is cylindrical on, hook portion cylinder There is through hole (22) in rear end connection pushing part (12), pushing part (12) rear end connection connecting portion (13), recovery set.

5. new Recyclable biliary stent induction system according to claim 4, it is characterised in that the post of hook portion cylinder 2~6 hook pawls are uniform-distribution with face, for uniformly hooking biliary tract rack 2~6 mesh of tail end.

6. new Recyclable biliary stent induction system according to claim 4, it is characterised in that pushing part (12) is circle Cylindricality, its left side is used to withstand support tail end when discharging biliary tract rack and be pushed out outer sheath (5), and its right side is abutted Middle pipe (4) left side；There is a chamfering right side, recovery set Guan Shineng in withdrawing smoothly is entered in sheath.

7. new Recyclable biliary stent induction system according to claim 4, it is characterised in that have outside connecting portion (13) Screw thread, is connected by screw thread with middle pipe left end internal thread.

8. new Recyclable biliary stent induction system according to claim 4, it is characterised in that recovery set passes through through hole It is connected with core pipe；Hook pawl outermost diameter and be slightly less than pushing part diameter, pushing part right-hand member has a chamfering, this is designed at two When ensureing to withdraw middle pipe and core pipe in surgical procedure, recovery set smoothly can enter in sheath.

9. new Recyclable biliary stent induction system according to claim 4, it is characterised in that recovery set for it is medical not Become rusty steel, develops under X-ray, to identify system into the position of biliary tract rack during human body.

10. new Recyclable biliary stent induction system according to claim 1, it is characterised in that sheath crimps nut (6) it is internal to have one section of internal thread and one section of inner conical surface；Internal thread coordinates with big handle left end external screw thread, and inner conical surface is bored with outer sheath The male cone (strobilus masculinus) of shape section coordinates；Bushing is made up of conical section and cylindrical section, inside there is through hole, can pass freely through middle pipe (4)；Pass through sheath Pipe crimps the cooperation of nut and bushing, and sheath is connected and fixed with big handle.