CN210749396U

CN210749396U - Biliary tract calculus removing device

Info

Publication number: CN210749396U
Application number: CN201920971745.0U
Authority: CN
Inventors: 郑卓容; 吴拱安; 潘泽升
Original assignee: Sonoscape Medical Corp
Current assignee: Sonoscape Medical Corp
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-06-16
Anticipated expiration: 2029-06-25

Abstract

The application discloses biliary tract calculus removing device, including sheath pipe and basket, the tip of basket is equipped with the guide head, still including setting firmly connecting part and cover on the guide head are established the guide ring that can supply the seal wire to pass on the connecting part, the guide ring with connecting part is articulated. The utility model provides a biliary tract calculus removing device, through adapting unit's setting will the guide ring is spacing on the guide head, and, the guide ring with adapting unit is articulated, can guarantee the nimble swing of guide ring makes the guide ring with cooperation between the seal wire is more smooth and easy, guarantees that the basket is pushed to total bile duct smoothly.

Description

Biliary tract calculus removing device

Technical Field

The application relates to the field of calculus removing devices, in particular to a biliary calculus removing device.

Background

The treatment method for treating the choledocholithiasis by using the duodenoscope is purchased by more and more hospitals, the basket is adopted to take stones for stones with the diameter less than 10mm, the stone-taking basket or balloon is adopted to take stones after mechanical crushing by using the crushing basket for stones with the diameter more than 10mm, and when the intubation is difficult, a doctor can assist in successfully inserting the basket into the common bile duct by means of guide wire guidance.

At present, the biliary tract structure is complex, and the guide wire is small in diameter, soft, flexible and excellent in pushing performance. Therefore, during the ERCP operation, a guide wire is usually inserted into the common bile duct in advance, and the basket is guided into the common bile duct by the guide action of the guide wire.

In the prior art, a guide wire passing structure is generally designed at one end of the outer side of a sheath tube at the front end of a basket, and the guide wire passing structure is a structure for a guide wire to pass through, or a 2-cavity or 3-cavity sheath tube is adopted on the sheath tube at the front end of the basket, and the guide wire passes through an independent cavity channel of the sheath tube; or, a section of plastic hose is glued at the end part of the guide head of the metal head of the net basket.

However, in the above prior art, the guide wire structure is designed on the outer side of the sheath tube, so that the front end of the sheath tube becomes thick and hard, and when the endoscope is bent at a large angle, the passing performance of the basket through the lumen inside the endoscope body is poor; the sheath at the front end of the basket adopts a 2-cavity or 3-cavity sheath scheme, so that the sheath is difficult to process and high in cost; and the scheme of gluing a section of plastic hose at the metal head end of the basket, this kind of mode because the hose is thin or the adhesion strength is not enough, at the basket along the seal wire propelling movement in-process, the hose can be cut off by the seal wire or fall out from the metal head end.

Therefore, how to improve the pushing stability of the net basket is a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a biliary tract calculus removing device for guarantee that the basket of netting is propelling movement smoothly to total bile duct, the direction is smooth and easy, and is with low costs.

In order to achieve the above purpose, the present application provides the following technical solutions:

the utility model provides a biliary tract calculus removing device, includes sheath pipe and basket, the tip of basket is equipped with the guide head, still including setting firmly adapting unit and cover on the guide head are established adapting unit is last and can supply the guide ring that the seal wire passed, the guide ring with adapting unit articulates.

Preferably, the connecting member is provided with a stopper portion for limiting a movement limit position of the guide ring.

Preferably, the corners of the limiting part are provided with arc chamfers.

Preferably, the connection member forms the stopper portion by chip cutting, or the connection member forms the stopper portion by metal injection molding.

Preferably, the connecting part and the guide head are connected by welding, clamping or screwing.

Preferably, the basket comprises a basket body and a guy cable, the guide head is positioned at one end part of the basket body far away from the guy cable, the guy cable penetrates through the sheath tube, and the basket body can be pulled into or pushed out of the sheath tube by the guy cable.

Preferably, the basket is a stone-taking basket, a gravel basket or a stone-taking and gravel-breaking integrated basket.

Preferably, the basket comprises a basket body; the expanded shape of the steel wires of the basket body can be a curve shape, a prismatic shape or a spiral shape, and the number of the steel wires of the basket body is 4, 5, 6 or 8.

Preferably, the end face of the connecting part, which is far away from the guide head, is an arc-shaped curved surface, the arc-shaped curved surface is a cylindrical curved surface or a spherical curved surface, the connecting part is provided with a hollow part, and the guide ring is sleeved in the hollow part.

Preferably, the guide ring has a circular or elliptical ring shape so as to penetrate through the hollow portion of the connecting member and freely swing along the hollow portion, and the guide ring has a circular or elliptical cross section along the circumferential direction thereof.

Preferably, the hollow part is sleeved with the guide ring, and the surface of the hollow part sleeved with the guide ring is a smooth curved surface.

The utility model provides a biliary tract calculus removing device, including sheath pipe and basket, the tip of basket is equipped with the guide head, still including setting firmly connecting part and cover on the guide head are established the guide ring that can supply the seal wire to pass on the connecting part, the guide ring with connecting part is articulated. The utility model provides a biliary tract calculus removing device, through adapting unit's setting will the guide ring is spacing on the guide head, and, the guide ring with adapting unit is articulated, can guarantee the nimble swing of guide ring makes the guide ring with cooperation between the seal wire is more smooth and easy, freely adjusts angle between adapting unit and the guide ring to adjustment propelling movement direction guarantees the basket propelling movement smoothly to total bile duct, and adapting unit is firm in connection reliable with the metal guide head of basket, has avoided the risk that the guide ring drops.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1-A is a schematic structural diagram of a basket in the biliary calculus removing device according to an embodiment of the present disclosure;

FIG. 1-B is a schematic structural diagram of another embodiment of a basket in the biliary calculus removing device provided in the present application;

fig. 2 is a schematic structural diagram of an embodiment of a connecting member in the biliary calculus removing device provided in the present application;

fig. 3 is a schematic structural diagram of another embodiment of a connecting part in the biliary calculus removing device provided by the present application;

fig. 4 is a schematic structural diagram of the position of a guide wire and a common bile duct in the biliary calculus removing device provided by the present application;

fig. 5 is a schematic view of a matching structure of a guide ring and a guide wire in the biliary calculus removing device provided by the present application;

fig. 6 is a schematic structural view of the biliary calculus removing device provided by the present application when the basket body is opened;

wherein: the multifunctional endoscope comprises a sheath tube (1), a basket (2), a guide head (2-1), a basket body (2-2), a pull rope (2-3), a connecting component (3), a limiting part (3-1), a guide ring (4), a guide wire (5), bile duct stones (6), a common bile duct (7), duodenum (8) and a duodenoscope (9).

Detailed Description

The core of this application is that a biliary tract calculus removing device is provided, through the setting of guide ring and adapting unit, can effectively improve the flexibility of guide ring, the guide ring should not drop, and the cooperation between the seal wire is more smooth and easy.

In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.

Referring to fig. 1 to 6, fig. 1-a is a schematic structural view of a basket in a biliary calculus removing device according to an embodiment of the present disclosure; FIG. 1-B is a schematic structural diagram of another embodiment of a basket in the biliary calculus removing device provided in the present application; fig. 2 is a schematic structural diagram of an embodiment of a connecting member in the biliary calculus removing device provided in the present application; fig. 3 is a schematic structural diagram of another embodiment of a connecting part in the biliary calculus removing device provided by the present application; fig. 4 is a schematic structural diagram of the position of a guide wire and a common bile duct in the biliary calculus removing device provided by the present application; fig. 5 is a schematic view of a matching structure of a guide ring and a guide wire in the biliary calculus removing device provided by the present application; fig. 6 is a schematic structural view of the biliary calculus removing device provided by the present application when the basket body is opened.

In this embodiment, the biliary calculus removing device includes a sheath 1, a basket 2, a connecting member 3, and a guide ring 4.

Wherein, basket 2 includes: the net basket comprises a guide head 2-1, a net basket body 2-2 and a guy cable 2-3, wherein the guide head 2-1 is positioned at one end part of the net basket body 2-2 far away from the guy cable 2-3, the guy cable 2-3 penetrates through the inside of a sheath tube 1, and the guy cable 2-3 can pull in or push out the net basket body 2-2 from the sheath tube 1.

The guide head 2-1 is arranged at the head end part of the net basket 2, the connecting part 3 is fixedly arranged on the guide head 2-1, the connecting part 3 is positioned at one end part of the guide head 2-1 far away from the inhaul cable 2-3, a hollow part for placing the guide ring 4 is arranged in the middle of the connecting part 3, the guide ring 4 is sleeved on the hollow part of the connecting part 3 and can swing around the connecting part 3, the guide wire 5 can penetrate through the middle of the guide ring 4, and the net basket 2 is guided to be pushed forwards along the guide wire 5; the guide head 2-1 is preferably a metal guide head, and it is not limited to a plastic guide head, a ceramic guide head.

The connecting surface of the guide head 2-1 and the connecting part 3 is a plane, and is preferably a circular plane; because the welding has high connection strength and firm and reliable connection, the connection mode of the guide head 2-1 and the connecting part 3 is preferably welding, but the connection mode is not limited to welding, threaded connection, snap connection or the like; the welding method between the connecting member 3 and the guide head 2-1 is not limited to laser welding, fiber welding, resistance welding, or the like.

The specific assembling and processing method of the connecting part 3 comprises the following steps: the connecting part 3 is provided with a hollow part for placing the guide ring 4, before the connecting part 3 is fixedly arranged on the guide head 2-1, the guide ring 4 is sleeved on the connecting part 3, so that a certain position of the circumference of the guide ring 4 is positioned in the hollow part, and then the connecting part 3 is fixedly connected with the guide head 2-1.

The utility model provides a biliary tract calculus removing device, setting through adapting unit 3, it is spacing on guide head 2-1 with guide ring 4, and, guide ring 4 is articulated with adapting unit 3, can guarantee that guide ring 4 swings in a flexible way, make the cooperation between guide ring 4 and seal wire 5 more smooth and easy, freely adjust the angle between adapting unit 3 and the guide ring 4, thereby adjustment propelling movement direction, guarantee basket 2 propelling movement to total bile duct 7 smoothly, and, adapting unit 3 is reliable with the metal guide head 2-1 firm in connection of basket 2, the risk that guide ring 4 drops has been avoided.

In some specific embodiments, the connecting part 3 may further include a limiting portion 3-1 for limiting a swing angle limit position of the guide ring 4, as shown in fig. 3, the limiting portion 3-1 is disposed near a fixed connection position of the connecting part 3 and the guide head 2-1 along a direction of two sides of the outer circumference of the annular connecting part 3 as a symmetry axis, and the limiting portion 3-1 may limit the swing angle limit of the guide ring 4 during the swing of the guide ring 4 along the hollow portion of the connecting part 3, specifically, the limiting portion 3-1 and the guide ring 4 abut against each other to limit the swing angle limit; therefore, the range of the swing angle can be adjusted by adjusting the arrangement position and the height of the limiting part 3-1; for example, in the structure shown in FIG. 2, when the stopper portion 3-1 is not provided, the swing angle of the guide ring 4 is 180, in the structure shown in FIG. 3, when the stopper portion 3-1 is provided, the swing angle of the guide ring 4 is 120 and 150, and of course, the position and height of the stopper portion 3-1 can be set as desired, and the range of the swing angle of the guide ring 4 is not limited to the angular range given in the present embodiment.

Furthermore, an inclined plane can be arranged on the limiting part 3-1, the limiting part 3-1 is abutted against the guide ring 4 through the inclined plane, the surface of the limiting part 3-1 is in accordance with the surface shape of the guide ring 4, and the range of the swing angle of the guide ring 4 can be adjusted by adjusting the included angle between the limiting plane and the plane of the guide head 2-1; through the inclined plane structure, the surface of the limiting part 3-1 can be more attached to the surface of the guide ring 4, and the abrasion to the guide ring 4 is reduced.

Furthermore, the limiting parts 3-1 can be one, two, three or four along the vicinity of the fixed connection position of the connecting part 3 and the guide head 2-1; the edge of the limiting part 3-1 is provided with an arc chamfer, so that the smoothness is improved, and the damage to a patient is reduced; the limiting part 3-1 and the connecting part 3 can be fixedly connected into a whole in an integral structure or in a split structure.

On the basis of the above embodiments, the end surface of the connecting part 3 far away from the guiding head 2-1 is an arc-shaped curved surface, and the damage to the patient can be reduced by the arrangement of the arc-shaped curved surface; the arc-shaped curved surface of the connecting part 3 can be a cylindrical curved surface, the connecting part 3 is provided with a hollow part, the hollow part is sleeved with the guide ring 4, and the sleeved surface of the hollow part and the guide ring 4 is a smooth curved surface, so that the guide ring 4 can freely swing around the connecting part 3; the arc-shaped curved surface of the connecting part 3 can also be a spherical curved surface, a hollow part is arranged at the center of the sphere of the connecting part 3, and the guide ring 4 is sleeved in the hollow part of the connecting part 3 and can freely swing around the connecting part 3; the size of the hollow part should be larger than the loop width of the guide loop 4, which is the surface excircle diameter of the guide loop 4 minus the surface inner circle diameter of the guide loop 4, so that the guide loop 4 can be hung on the connecting part 3; furthermore, the hollow part is arranged, and meanwhile, the limiting part 3-1 can be processed together, the surface of the limiting part 3-1 is preferably an arc surface and is matched with the arc surface of the guide ring 4, so that the limiting effect of the limiting part 3-1 on the guide ring 4 is improved; the end face of the guide head 2-1 connected with the connecting part 3 is preferably a circular plane, and the diameter of the circular plane of the connecting part 3 is preferably the same as the diameter of the excircle of the guide head 2-1, so that the welding connection is convenient.

On the basis of the above embodiments, the guide ring 4 may be circular, and the circular guide ring 4 is adopted, so that the relative angle between the guide ring 4 and the guide wire 5 can be automatically adjusted and applied, and the guide is smoother; the section of the guide ring 4 along the circumferential direction of the guide ring can be circular or elliptical, so that the guide ring 4 is natural and smooth, the friction between the guide ring 4 and the guide wire 5 is small, and the net basket 2 can be pushed smoothly.

On the basis of the above embodiments, the basket body 2-2 includes a plurality of steel wires having elasticity, the basket body 2-2 is limited inside the sheath tube 1 before being pushed out of the sheath tube 1, and the basket body 2-2 is naturally unfolded to form a basket shape after being pushed out of the sheath tube 1, as shown in fig. 1-a and 1-B, the steel wires of the basket body 2-2 can be curved, angular or spiral after being unfolded, wherein the angular form is a broken line form having a bent angular form, and the number of the steel wires of the basket body 2-2 is not limited, and can be 4, 5, 6 or 8.

On the basis of each embodiment, the basket 2 provided by the embodiment can be a stone-taking basket, a gravel basket or a stone-taking and gravel-breaking integrated basket, and can be a disposable basket or a reusable basket. The stone breaking basket can be matched with the stone breaking handle, and stone breaking can be carried out on stones with the diameter larger than 10mm by adopting the stone breaking basket, and then the stones are taken by using the stone taking basket or the saccule after the stones with the diameter smaller than 10mm are crushed. The guide ring 4 is movably arranged on the metal guide head 2-1, the guide ring 4 is movably fixed on the metal guide head 2-1 by the connecting component 3, and the guide ring 4 can swing along the axial direction of the connecting component 3.

The use method of the biliary tract calculus removing device comprises the following steps:

as shown in fig. 4 to 6, the guide wire 5 enters the biliary tract for angiography through a duodenoscope 9 to know the position, size and number of the calculi 6, then the lower nipple of the duodenum 8 is cut off, one end of the guide wire 5 extends into the common bile duct 7 to exceed the position of the calculi 6, the guide ring 4 is sleeved at the other end of the guide wire 5, the guide ring 4 swings to a proper angle along the metal guide head 2-1 to push the sheath tube 1, so that the basket 2 and the metal guide head 2-1 are pushed forwards along the guide wire 5; when the basket 2 extends out of the jaw opening of the forceps-raising device, the guide ring 4 continues to advance along the guide wire 5, and the whole basket 2 enters the common bile duct 7 through the duodenal papilla 8 under the guidance of the guide wire 5; after the guide head 2-1 moves to a position exceeding the calculus 6, the basket body 2-2 moves to be separated from the sheath tube 1 along the axial direction of the sheath tube 1 by pushing the inhaul cable 2-3, the basket body 2-2 is opened under the action of self elasticity, the calculus 6 is wrapped, then the calculus or gravel can be taken out, and then the inhaul cable 2-3 is pulled to pull the basket body 2-2 out of the total bile duct 7, so that the calculus or gravel taking work is completed.

According to the calculus removing device provided by the embodiment, the guide ring 4 is arranged on the metal guide head 2-1 of the basket 2, so that a pipe does not need to be additionally arranged outside the sheath pipe 1, and a multi-cavity sheath pipe does not need to be adopted; secondly, the connecting part 3 is fixed with the guide head 2-1 of the basket 2 reliably by welding, the guide ring 4 is positioned between the connecting part 3 and the guide head 2-1 of the basket 2, can rotate and can swing along the connecting part 3, so that the relative angle between the guide wire 5 and the basket 2 can be automatically adjusted and applied, and the guide is smoother.

The biliary calculus removing device provided by the present application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. The utility model provides a biliary tract calculus removing device, includes sheath pipe (1) and basket (2), the tip of basket (2) is equipped with guide head (2-1), its characterized in that still including setting firmly adapting unit (3) and cover on guide head (2-1) are established guide ring (4) that adapting unit (3) were gone up and can supply seal wire (5) to pass, guide ring (4) with adapting unit (3) are articulated.

2. The biliary calculus removing device according to claim 1, wherein the connecting member (3) is provided with a stopper (3-1) for limiting a movement limit position of the guide ring (4).

3. The biliary calculus removing device according to claim 2, wherein the limiting portion (3-1) has a rounded chamfer at a corner thereof.

4. The biliary calculus removing device according to claim 2, wherein the connection member (3) forms the stopper portion (3-1) by chip machining, or wherein the connection member (3) forms the stopper portion (3-1) by metal injection molding.

5. The biliary calculus removal device according to claim 1, wherein the connection member (3) is welded, snapped or screwed to the guide head (2-1).

6. The biliary calculus removing device according to claim 1, wherein the basket (2) comprises a basket body (2-2) and a pulling cable (2-3), the guiding head (2-1) is located at an end of the basket body (2-2) far away from the pulling cable (2-3), the pulling cable (2-3) penetrates through the sheath (1), and the pulling cable (2-3) can pull the basket body (2-2) into or out of the sheath (1).

7. The biliary calculus removal device according to claim 1, wherein the basket (2) is a calculus removal basket, a lithotripsy basket, or a calculus and lithotripsy integrated basket.

8. The biliary calculus removal device according to claim 1, wherein the basket comprises a basket body (2-2); the shape of the steel wires of the basket body (2-2) after being unfolded can be curved, angular or spiral, and the number of the steel wires of the basket body (2-2) is 4, 5, 6 or 8.

9. The biliary calculus removing device according to any one of claims 1 to 8, wherein an end surface of the connecting member (3) away from the guide head (2-1) is an arc-shaped curved surface, the arc-shaped curved surface is a cylindrical curved surface or a spherical curved surface, the connecting member (3) is provided with a hollow portion, and the guide ring (4) is sleeved in the hollow portion.

10. The biliary calculus removing device according to claim 9, wherein the guide ring (4) has a circular or elliptical ring shape so as to penetrate through a hollow portion of the connection member (3) and freely swing along the hollow portion, and the guide ring (4) has a circular or elliptical cross section along a circumferential direction thereof.

11. The biliary calculus removing device according to claim 9, wherein the hollow portion is fitted to the guide ring (4), and a surface of the hollow portion fitted to the guide ring (4) is a smooth curved surface.