CN111685843A

CN111685843A - Hemostatic clamp

Info

Publication number: CN111685843A
Application number: CN201911094245.4A
Authority: CN
Inventors: 于岭; 于淳
Original assignee: Beijing Donglin Fuji Medical Equipment Co ltd
Current assignee: Beijing Donglin Fuji Medical Equipment Co ltd
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-09-22

Abstract

The invention discloses a hemostatic clamp which comprises a fixed frame, two clamping pieces and a ball head pull rod, wherein the two clamping pieces are oppositely arranged at the front end of the fixed frame; the method is characterized in that: the plastic sleeve is arranged between the steel sleeve and the inner wall of the fixing frame; the ball head pull rod penetrates through the steel sleeve; after the ball-head pull rod is separated from the clamping piece, the ball head drives the steel sleeve to slide out of the plastic sleeve by pulling the ball-head pull rod backwards. The hemostatic clamp provided by the invention realizes the opening and closing of the two clamping pieces through the ball-head pull rod, and realizes the separation of the clamping part at the front end of the hemostatic clamp and the control part at the rear end through the cooperation of the ball-head pull rod, the plastic sleeve and the steel sleeve.

Description

Hemostatic clamp

Technical Field

The invention relates to a hemostatic clamp, in particular to a hemostatic clamp pulled by using a ball-head pull rod, and belongs to the field of medical instruments.

Background

The metal clip hemostasis under the endoscope is one of the hemostasis means which are widely applied, and the skilled metal clip operation is carried out on the proper cases, so that the hemostasis can be effectively carried out, the re-bleeding can be prevented, the adverse reaction can be reduced, and the safety and the cure rate of the digestive tract bleeding endoscope treatment can be greatly improved. The hemostasis mechanism of the metal hemostatic clip is the same as that of surgical vessel ligation or suture, and the metal hemostatic clip is a physical mechanical method, and peripheral tissues and bleeding vessels are ligated together by utilizing mechanical force generated when the hemostatic clip is closed, so that the bleeding vessels are closed, blood flow is blocked, the aim of hemostasis is achieved, and the metal hemostatic clip is suitable for hemostasis treatment of non-varicose active hemorrhage and visible blood vessel stump lesion.

The existing hemostatic clamp has the defect of difficult operation, the hemostatic clamp cannot be operated in an trial mode, once the hemostatic clamp is closed, the hemostatic clamp cannot be opened again, and if misoperation exists, part of the hemostatic clamp can be directly discarded. Accordingly, there is a need to provide a hemostatic clamp that can be repeatedly opened and closed prior to clamping tissue, and that can be locked after clamping tissue.

In addition, the existing hemostatic clamp mostly uses a three-jaw clamp spring to realize the separation of the hemostatic clamp and a control part, and the problem of difficult separation exists when the hemostatic clamp is used.

Disclosure of Invention

The invention aims to provide a novel hemostatic clamp.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

a hemostatic clamp comprises a fixed frame, two clamping pieces and a ball head pull rod, wherein the two clamping pieces are oppositely arranged at the front end of the fixed frame, and the ball head pull rod is used for driving the two clamping pieces to open and close;

the plastic sleeve is arranged between the steel sleeve and the inner wall of the fixing frame;

the ball head pull rod penetrates through the steel sleeve;

after the ball-head pull rod is separated from the clamping piece, the ball head drives the steel sleeve to slide out of the plastic sleeve by pulling the ball-head pull rod backwards.

Preferably, the inner surface of the plastic sleeve is an inclined conical surface, and the inner diameter of the top of the plastic sleeve is larger than that of the bottom of the plastic sleeve;

the dimensions of the inner surface of the plastic sleeve match the dimensions of the outer surface of the portion with which the steel sleeve is mated.

Preferably, the steel sleeve is divided into an upper part and a lower part, wherein the upper part is used for matching with the plastic sleeve, and the lower part is used for connecting the spring tube.

Wherein preferably the outer surface of the upper half of the steel casing is an interference fit with the inner surface of the plastic casing.

Preferably, a plurality of holes are arranged on the circumference of the fixing frame, and glue is injected into the fixing frame through the holes to bond the plastic sleeve and the fixing frame together.

Preferably, the ball-head pull rod comprises a pull rod and a ball head arranged at the front end of the pull rod, the diameter of the ball head is larger than that of the pull rod, and meanwhile, the diameter of the ball head is larger than the inner diameter of the steel sleeve; the diameter of the pull rod is equal to the inner diameter of the steel sleeve.

Preferably, the ball-end pull rod further comprises a connecting pipe, the top of the connecting pipe is connected with the pull rod, and the bottom of the connecting pipe is used for being connected with the inhaul cable.

The hemostatic clamp provided by the invention has the advantages that the opening and closing of the two clamping pieces are realized through the ball-head pull rod, the separation of the clamping part at the front end and the control part at the rear end is realized through the matching of the ball-head pull rod, the plastic sleeve and the steel sleeve, the structure is simple, the operation is simple and convenient, and the operation stability is high, so that the hemostatic clamp is suitable for being widely used.

Drawings

FIG. 1 is a schematic view of a hemostatic clip provided by the present invention;

FIG. 2 is a cross-sectional schematic view of the hemostatic clip of FIG. 1;

FIG. 3 is a schematic view of the structure of the clip of the hemostatic clip;

FIG. 4 is a schematic structural view of a fixing frame in the hemostatic clamp;

FIG. 4A is a schematic cross-sectional view of the holder of FIG. 4;

FIG. 5 is a schematic view of the structure of the ball-end pull rod in the hemostatic clamp;

FIG. 6 is a schematic view of the structure of the plastic sleeve in the hemostatic clip;

FIG. 7 is a schematic structural view of a steel sleeve in the hemostatic clamp;

FIG. 8 is a schematic view of the hemostatic clip of FIG. 1 in a closed state;

FIG. 9 is a cross-sectional schematic view of the hemostatic clip of FIG. 8;

fig. 10 is a schematic view of the hemostatic clip of fig. 1 in a separated state.

Detailed Description

The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. In the following description, the clamping portion for clamping the blood vessel is the front end, and the control portion for the operation of the hemostatic clamp is the rear end.

As shown in fig. 1 and 2, the hemostatic clip provided by the invention comprises two clips 1, a fixing frame 2, a ball-head pull rod 4, a plastic sleeve 5 and a steel sleeve 6.

Wherein, two clamping pieces 1 set up the front end at mount 2 through fixed pin axle 3, and two clamping pieces 1 set up relatively. The fixing pin shafts 3 respectively penetrate through the sliding grooves 13 arranged in the middle of the two clamping pieces 1 and limit the two clamping pieces 1 between the two brackets at the front end of the fixing frame 2. The fixed pin shaft 3 can slide along the sliding groove 13, and the two clamping pieces 1 can rotate around the fixed pin shaft 3. The two clip pieces 2 are provided at their rear ends with hemispherical shell type connecting portions 18 (also called ball bowls), respectively. The ball tie 4 includes a tie rod 41 and a ball 40 provided at a front end of the tie rod 41, and the ball 40 of the ball tie 4 is confined inside two opposing hemispherical shell type connecting portions 18. The ball-head pull rod 4 is used for driving the two clamping pieces 1 to open and close. Along with the reciprocating motion of the ball head 40 in the vertical direction, the rear ends of the two clamping pieces 1 are driven to reciprocate in the vertical direction, and meanwhile, the two clamping pieces 1 are opened and closed under the action of the fixed pin shaft 3. When the two clamping pieces 1 are closed, the two closed clamping pieces 1 are clamped at the front end of the fixing frame 2 by continuously pulling the ball head pull rod 4 backwards. Then, the ball 4 is pulled further backward, and the ball 40 moves backward to deform the hemispherical shell type connecting portion 18, so that the ball 40 is separated from the hemispherical shell type connecting portion 18.

The fixing frame 2 comprises a tube body 21 and two supports 22 arranged at the front end of the tube body 21, wherein the tube body 21 comprises a plurality of step-shaped cavities, the inner diameter of the upper-layer cavity is smaller than that of the lower-layer cavity, the plastic sleeve 5 and the steel sleeve 6 are arranged in the region with the largest inner diameter of the lower part of the inner cavity of the fixing frame 2 (namely, in the cavity of the lowest layer), and the plastic sleeve 5 is arranged between the steel sleeve 6 and the inner wall of the fixing frame 2. The ball-end tie rod 4 passes through the steel sleeve 6. After the ball-end pull rod 4 is separated from the clip 1, the ball end 40 drives the steel sleeve 6 to slide out of the plastic sleeve 5 by pulling the ball-end pull rod 4 backwards.

Specifically, as shown in fig. 3, the clip 1 has a front portion with an inner-snap claw 11, a middle portion with an intermediate connector 12, and a rear end with a hemispherical shell-type connecting portion 18. Wherein, a saw tooth extending towards the closing direction is formed at the front end of the claw 11 for realizing clamping. The intermediate connecting body 12 of the clip 1 is formed with a slide groove 13. The chute 13 includes an inclined portion 14 and a bent portion 15. The distance from the inclined part 14 to the outer wall of the clip 1 is gradually reduced from the rear end to the front end of the clip 1, and the outer wall of the clip 1 refers to the side wall facing away from the closing direction of the clip 1. The bending part 15 is arranged at one end of the sliding chute 13 far away from the hemispherical shell type connecting part 18, namely, at a position close to the front end of the clamping piece 1, and the extending direction of the bending part 15 is parallel to the length direction of the clamping piece 1. When the fixing pin 3 slides from the inclined portion 14 of the sliding slot 13 to the position of the bent portion 15, the two jaws 1 are in the closed and locked position. The hemispherical shell type connecting portions 18 of the two clips 1 have opening directions facing each other, and are used for limiting the ball 40 of the ball tie rod 4 in the two hemispherical shell type connecting portions 18. The ball tie 4 is constructed as shown in fig. 5, and the ball tie 4 includes a tie rod 41 and a ball 40 disposed at a front end of the tie rod 41. A recess is formed in each half-shell type connecting portion 18 for receiving a link 41 of the ball tie 4. By pulling the ball tie 4, the ball 40 moves backward to deform the hemispherical shell type connecting portion 18, and the ball tie 4 is separated from the hemispherical shell type connecting portion 18.

Further, an annular projection 19 is formed on the outer wall of the hemispherical shell type connecting portion 18 for engagement with an annular flange 20 provided at the front end of the tube body of the holder 2; when the half-shell type connecting part 18 moves backwards into the fixing frame 2, the bulge 19 is clamped behind the annular flange 20, and closed locking is realized. In order to facilitate the pulling of the ball stud 4, the projection 19 has an inclined transition surface.

As shown in fig. 4 and 4A, the fixing frame 2 includes a tube 21 and two brackets 22 disposed at the front end of the tube 21, and the two brackets 22 respectively extend upward from two opposite sides of the tube 21. Through holes 24 are respectively formed at corresponding positions of the upper portions of the two brackets 22. The fixing pin shafts 3 respectively penetrate through the sliding grooves 13 arranged in the middle of the two clamping pieces 1, and the two ends of the fixing pin shafts are respectively fixed after penetrating through the through holes 24, so that the two clamping pieces 1 are limited between the two brackets 22 at the front end of the fixing frame 2. The clip 1 can perform an opening and closing movement in the area between the two brackets 22.

As shown in fig. 2 and 4A, a plurality of stepped cavities are formed in the pipe body 21, wherein the inner diameter of the upper layer cavity is smaller than that of the lower layer cavity. Since the inner diameter of the topmost cavity is smaller than the distance between the two supports 22, an annular flange 20 is formed where the topmost cavity meets the supports, the annular flange 20 defining a narrow entrance to the tube body 21. Under the action of the ball-head tie rod 4, the hemispherical shell type connecting parts 18 of the two clamping pieces 1 enter the topmost layer cavity 26 through the narrow entrances, so that the protrusions 19 arranged on the outer walls of the hemispherical shell type connecting parts 18 are clamped at the lower parts of the annular flanges 20, and closed locking is realized.

In the illustrated embodiment, two stepped regions, which are smaller at the top and larger at the bottom, are formed inside the tube body 21 below the topmost cavity, and the inner diameter of the upper first region 27 is smaller than the inner diameter of the lower second region 28. The plastic sleeve 5 and the steel sleeve 6 are locked in the second region 28. The three holes 25 are formed on the circumference of the second region 28, and the tube 21 of the holder 2 is injected with glue through the holes 25, whereby the holder 2 and the plastic sleeve 5 are bonded to each other.

The structure of the ball tie rod 4 is shown in fig. 5, the ball tie rod 4 comprises a tie rod 41 and a ball 40 arranged at the front end of the tie rod 41, and the diameter of the ball 40 is larger than that of the tie rod 41.

The ball 40 is limited in the half-ball shell type connecting part 18 at the rear end of the two clamping pieces 1, the reciprocating motion of the ball 40 forms the reciprocating motion of the clamping pieces 1, and meanwhile, the opening and closing of the two clamping pieces 1 are formed under the action of the fixed pin shaft 3. When the two clamping pieces 1 are closed, the ball head 40 moves backwards continuously to enable the two clamping pieces 1 to be clamped in the fixed frame 2, and the hemispherical shell type connecting part 18 at the rear ends of the two clamping pieces 1 is deformed, so that the ball head 40 is separated from the hemispherical shell type connecting part 18.

The diameter of the tension rod 41 is equal to or slightly smaller than the inner diameter of the steel casing 6, so that the tension rod 41 moves up and down stably along the hole in the steel casing 6. The diameter of the ball 40 is larger than the inner diameter of the steel casing 6, so that, when the ball 40 moves to the position contacting the steel casing 6 and then moves backwards, the ball 40 will drive the steel casing 6 to slide out of the plastic casing 5.

The ball-end pull rod 4 further comprises a connecting pipe 43, the top of the connecting pipe 43 is connected with the pull rod 41, and the bottom of the connecting pipe 43 is used for connecting with a pull cable. Specifically, the lower end of the tie rod 41 is inserted into the connecting tube 43 and fixed, and the stay is inserted into the hole 44 at the bottom of the connecting tube 43 and fixed, so that the connection between the ball tie rod 4 and the stay is realized.

The structure of the plastic casing 5 and the steel casing 6 is shown in fig. 6 and 7. The outer diameter of the plastic sleeve 5 matches the inner diameter of the lowermost region (i.e., second region 28) of the holder 2; the dimensions of the inner surface of the plastic sleeve 5 match the dimensions of the outer surface of the part with which the steel sleeve 6 is fitted.

As shown in fig. 2 and 6, the inner surface 50 of the plastic sleeve 5 is an inclined conical surface; the top inner diameter of the plastic sleeve 5 is larger than the bottom inner diameter of the plastic sleeve 5.

As shown in fig. 7, the steel casing 6 has an upper half 61 for mating with the plastic casing 5 and a lower half 62 for connecting the spring tube. Specifically, the outer surface of the upper half part 61 is a conical surface matched with the inner surface 50 of the plastic sleeve 5, and the outer surface of the upper half part 61 can be in interference fit with the inner surface of the plastic sleeve 5; the outer surface of the lower half 62 is a cylindrical surface and can be inserted into and fixed by a spring tube.

In the structure, the plastic sleeve 5 and the steel sleeve 6 are arranged in the bottom cavity of the fixing frame 2, the ball head 40 of the ball head pull rod 4 pushes the steel sleeve 6 to extrude the plastic sleeve 5 to deform through the rear pull ball head pull rod 4, so that the ball head pull rod 4 drives the steel sleeve 6 to slide out of the plastic sleeve 5, and the separation of a control part consisting of the ball head pull rod 4, the steel sleeve 6, a spring tube connected with the steel sleeve 6, a control handle and the like from a clamping part at the front end of the hemostatic clamp is realized. The clamping part left in the body comprises two clamping pieces 1, a fixing frame 2, a fixing pin 3 and a plastic sleeve 5, and can be made of degradable materials.

The structure of the hemostatic clamp provided by the present invention is described above, and the assembling process and the using process of the hemostatic clamp are described in detail below with reference to fig. 1, 2, 8, 9 and 10.

When assembling the hemostatic clamp, firstly, the ball 40 of the ball-head pull rod 4 is placed in the hemispherical shell type connecting part 18 of the two clamping pieces 1; the fixing frame 2 is sleeved on the two clamping pieces 1, and the fixing pin 3 is inserted. Wherein, a protective cap can be sleeved on the outer part of the fixing pin 3 to prevent the fixing pin 3 from falling off. Then, the plastic sleeve 5 and the steel sleeve 6 are sleeved on the pull rod 41 of the ball-end pull rod 4; and the plastic sleeve 5 is inserted into the base of the holder 2. In order to enhance the connection strength between the fixing frame 2 and the plastic sleeve 5, glue is dispensed at three circular holes 25 reserved in the fixing frame 2, and the plastic sleeve 5 is bonded with the fixing frame 2. Then, the ball-end pull rod 4 is butted with the connecting pipe 43, and then butted with the stay cable. Finally, the thin end of the steel sleeve 6 is inserted into the inner hole of the spring tube, welded with the spring tube and provided with the handle assembly.

The hemostatic clamp clamps a target affected part through the closure of the two symmetrical clamping pieces 1, and achieves the effects of hemostasis and wound surface closure. The open and closed states of the hemostatic clamp during trial operation are shown in fig. 1, 2, 8 and 9, respectively. When the ball head pull rod 4 is pushed forwards, the two clamping pieces 1 are opened under the action of the fixed pin shaft 3 and the ball head 40; when the ball-head pull rod 4 is pulled backwards, the two clamping pieces 1 are closed under the action of the fixed pin shaft 3 and the ball head 40. Along with the reciprocating motion of the ball-head pull rod 5, the clamping piece 2 can be opened and closed for many times. In the process, the fixing pin 3 slides in the inclined part 14 of the sliding slot 13 of the two clamping pieces 1, and the hemispherical shell type connecting part 18 of the clamping piece 1 moves up and down between the two branches of the fixing frame 2.

As shown in fig. 10, when the hemostatic clamp clamps the target tissue, the hemispherical shell type connecting part 18 is moved backward by pulling the ball-end pull rod 4 backward; when the projections 19 on the outside of the half-shell type connecting part 18 are locked behind the annular flange 20 of the uppermost cavity 26 of the fixing frame 2, the two clamping pieces 1 are in the closed locking position. At the same time, the fixed pin 3 slides into the bent portion 15 of the slide groove 13, locking synchronously.

Pulling the ball stud 4 further backward causes the ball 40 to deform the hemispherical shell joint 18, and the ball 40 separates from the hemispherical shell joint 18. And the ball head pull rod 4 is continuously pulled backwards, the ball head 40 drives the steel sleeve 6 to force the plastic sleeve 5 to deform and slide out of the plastic sleeve 5, and the front-end clamping part and the rear-end control part of the hemostatic clamp are separated. Then, the cable is pulled backward, and the ball-end stay 4, the steel sleeve 6, and the spring tube etc. move backward together.

The structure of the hemostatic clip provided by the present invention and its attempted operation, closure locking and separation process are described in detail above. When the fixing frame 2, the plastic sleeve 5 and the steel sleeve 6 of the hemostatic clamp are separated, the fixing frame 2, the clamping piece 1, the fixing pin shaft 3 and the plastic sleeve 5 are left in the digestive tract of a human body. In order to facilitate the discharge of the hemostatic clamp from the body, the fixing frame 2, the clamping head 1, the fixing pin shaft 3 and the plastic sleeve 5 are partially or completely made of degradable biological materials, so that the components can be gradually decomposed and finally completely discharged out of the human body in the hemostatic process of the hemostatic clamp.

In summary, the hemostatic clamp provided by the invention realizes the opening and closing of the two clamping pieces through the ball-head pull rod, and the separation of the clamping part at the front end and the control part at the rear end is realized through the cooperation of the ball-head pull rod, the plastic sleeve and the steel sleeve.

The hemostatic clip provided by the present invention is explained in detail above. Any obvious modifications to the invention, which would occur to those skilled in the art, without departing from the true spirit of the invention, would constitute a violation of the patent rights of the invention and would carry a corresponding legal responsibility.

Claims

1. A hemostatic clamp comprises a fixed frame, two clamping pieces and a ball head pull rod, wherein the two clamping pieces are oppositely arranged at the front end of the fixed frame, and the ball head pull rod is used for driving the two clamping pieces to open and close; the method is characterized in that:

the ball head pull rod penetrates through the steel sleeve;

2. The hemostatic clip of claim 1, wherein:

the inner surface of the plastic sleeve is an inclined conical surface, and the inner diameter of the top of the plastic sleeve is larger than the inner diameter of the bottom of the plastic sleeve;

3. The hemostatic clip of claim 1, wherein:

the steel sleeve is divided into an upper part and a lower part, wherein the upper part is used for being matched with the plastic sleeve, and the lower part is used for being connected with the spring tube.

4. The hemostatic clip of claim 3, wherein:

the outer surface of the upper half part of the steel sleeve is in interference fit with the inner surface of the plastic sleeve.

5. The hemostatic clip of claim 1, wherein:

and a plurality of holes are formed in the circumference of the fixing frame, and the plastic sleeve is bonded with the fixing frame by injecting glue into the fixing frame through the holes.

6. The hemostatic clip of claim 1, wherein:

the ball head pull rod comprises a pull rod and a ball head arranged at the front end of the pull rod, the diameter of the ball head is larger than that of the pull rod, and meanwhile, the diameter of the ball head is larger than the inner diameter of the steel sleeve; the diameter of the pull rod is equal to the inner diameter of the steel sleeve.

7. The hemostatic clip of claim 6, wherein:

the ball head pull rod further comprises a connecting pipe, the top of the connecting pipe is connected with the pull rod, and the bottom of the connecting pipe is used for being connected with a pull rope.

8. The hemostatic clip of claim 1, wherein:

the fixing frame comprises a pipe body and two supports arranged at the front end of the pipe body, and the two supports independently extend upwards from two opposite sides of the pipe body respectively; the two clamping pieces are arranged between the two brackets at the front end of the fixing frame through the fixing pin shaft.

9. The hemostatic clip of claim 8, wherein:

the pipe body comprises a plurality of step-shaped cavities, wherein the inner diameter of the upper-layer cavity is smaller than that of the lower-layer cavity; the plastic sleeve and the steel sleeve are arranged inside the cavity of the lowest layer.

10. The hemostatic clip of claim 9, wherein:

an annular flange is formed where the topmost cavity meets the bracket.

11. The hemostatic clip of claim 1, wherein:

the rear ends of the two clamping pieces are respectively provided with the hemispherical shell type connecting parts; the ball head is limited inside the two hemispherical shell type connecting parts;

the ball head moves backwards to deform the hemispherical shell type connecting part, and the ball head is separated from the hemispherical shell type connecting part.

12. The hemostatic clip of claim 11, wherein:

and a bulge is formed on the outer wall of the hemispherical shell type connecting part and is used for being matched with an annular flange arranged on the fixed frame, so that the clamping piece is in a closed locking position.

13. The hemostatic clip of claim 1, wherein:

the fixing pin shaft penetrates through the sliding grooves formed in the middle of the two clamping pieces respectively, and the two clamping pieces are limited between the two supports at the front end of the fixing frame.

14. The hemostatic clip of claim 13, wherein:

the spout includes slope part and bending part, wherein, bending part sets up the spout is close to the position of clamping piece front end, when the fixed pin axle moves to in the bending part, two the clamping piece is in closed latched position.

15. The hemostatic clip of claim 14, wherein:

the distance between the inclined part and the outer wall of the clamping piece is gradually reduced from the rear end to the front end of the clamping piece;

the extending direction of the bending part is parallel to the length direction of the clamping piece.