CN115153726A

CN115153726A - Releaser for releasing metal clip

Info

Publication number: CN115153726A
Application number: CN202210746410.5A
Authority: CN
Inventors: 闵秀君; 杨红燕; 杜江; 熊千惠; 邹婷
Original assignee: West China Hospital of Sichuan University
Current assignee: West China Hospital of Sichuan University
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-10-11
Anticipated expiration: 2042-06-29
Also published as: CN115153726B

Abstract

The invention provides a releaser for releasing a metal clip, relates to the technical field of medical instruments, and solves the technical problem that the metal clip which does not normally fall off cannot be conveniently taken off in the prior art. This releaser includes operation portion, outer pipeline and action portion, and the one end of outer pipeline is connected operation portion, action portion are connected to the other end, and operation portion includes slider and drive wire, and the slider is connected with the one end of drive wire, the other end of drive wire pass the inner chamber of outer pipeline to the direction of action portion extends, and action portion is including being located the drive wire end and the ejector pin that is connected with the drive wire, and under the effect of operation portion, the drive wire can drive the ejector pin outwards stretches out to act on the loose axle of metal clamp, make the loose axle along the slide rail of lock sleeve inner wall to the distal end removal, so that two clamping pieces of metal clamp open. The releaser can effectively release the metal clip, timely takes the metal clip which does not fall off, and avoids influencing the health of patients.

Description

Releaser for releasing metal clip

Technical Field

The invention relates to the technical field of medical instruments, in particular to a releaser for releasing a metal clip.

Background

In recent years, with the rapid development of various instruments of a digestive endoscope and diagnosis and treatment technologies of clinicians, more and more endoscopic interventional minimally invasive treatments are applied to clinics, and the development of endoscopic equipment and accessories thereof is also in the future. The treatment under a digestive endoscope is more and more widespread in clinical medicine, and among them, metal clips for hemostasis and perforation prevention under a digestive endoscope are particularly widely used. At present, most of metal clips used for treatment under a digestive endoscope can automatically fall off and are discharged through the anus after the treatment purpose is achieved, but a patient who is provided with the metal clip can review a gastrointestinal endoscope after one year, and the metal clip of the clipping tissue is found not to fall off normally and is discharged out of the body before one year and is clamped on the restored normal gastrointestinal mucosa all the time, so that artificial gastrointestinal foreign bodies are formed and exist in the human body.

As shown in fig. 1, fig. 1 shows a schematic structural diagram of a metal clip in a closed state in the prior art, the prior metal clip includes two clips 1 and a locking sleeve 2, distal ends of the two clips 1 can accommodate tissues after being closed to achieve a treatment purpose, an arc chute 5 is provided at proximal ends of the two clips 1, a pin shaft 3 is provided in the arc chute 5, and two ends of the pin shaft 3 are provided on a side wall of the locking sleeve 2 for realizing opening and closing of the clips. The outer sides of the arc-shaped sliding grooves 5 of the two clamping pieces 1 are provided with movable shafts 4, the movable shafts 4 penetrate through the two clamping pieces 1 and enable the two ends of the movable shafts to be movably arranged in the locking sleeve 2, and the inner wall of the locking sleeve 2 is symmetrically provided with sliding rails allowing the two ends of the movable shafts 4 to slide. After the metal clip clamps tightly the tissue, two clamping pieces can't be opened by oneself, consequently to the metal clip that can't drop by oneself, medical personnel can't directly tear it off with foreign matter pincers or biopsy forceps, can cause the risk of bleeding and perforation like this. And because the size of lock sleeve 2 is less, its inside accommodation space is also less, and current control line can't reuse because the metal clip that has separated after the operation is ended opens the clamping piece. If the metal clip is not taken off in time, the metal clip becomes foreign matter in the digestive tract, which has certain influence on the function of the digestive tract, and also causes certain psychological burden to patients, thus being not beneficial to the health of human bodies. Therefore, it is highly desirable to provide a metal clip releaser which is convenient to use and facilitates the medical staff to take off the metal clip which is not dropped off in time.

Disclosure of Invention

The invention aims to provide a releaser for releasing a metal clip, which solves the technical problem that the metal clip which does not normally fall off cannot be conveniently taken off in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to realize the purpose, the invention provides the following technical scheme:

the invention provides a releaser for releasing a metal clip, which comprises an operation part, an outer pipeline and an action part, wherein one end of the outer pipeline is connected with the operation part, and the other end of the outer pipeline is connected with the action part,

the operation portion includes slider and drive wire, the slider with the one end of drive wire is connected, the other end of drive wire passes the inner chamber of outer pipeline to the direction of action portion extends, action portion is including being located the drive wire is terminal and with the knock-pin that the drive wire is connected under the effect of operation portion, the drive wire can drive the knock-pin removes to distal end direction to act on the loose axle of metal clamp, make the loose axle along the slide rail of locking sleeve inner wall to distal end removal, so that two clamping pieces of metal clamp open.

According to a preferred embodiment, the action part further comprises a first guide sleeve, a strong magnetic sleeve and a second guide sleeve which are sequentially connected with the far end of the outer pipeline from far to near, wherein the strong magnetic sleeve is positioned between the first guide sleeve and the second guide sleeve, and the second guide sleeve is connected with the outer pipeline.

According to a preferred embodiment, the first guide sleeve is conical and has an increasing inner diameter from the connection with the ferromagnetic sleeve to the outside.

According to a preferable embodiment, the outer wall of the first guide sleeve inclines outwards from the connection part with the strong magnetic sleeve at an inclination angle of 10 degrees, and the length of the first guide sleeve is 2/5 of the length of the locking sleeve.

According to a preferred embodiment, the strong magnetic sleeve is a sleeve structure with strong magnetism to the locking sleeve, the inner diameter of the strong magnetic sleeve is not less than the outer diameter of the locking sleeve of the metal clamp,

the sum of the lengths of the first guide sleeve and the strong magnetic sleeve is not more than the length of the locking sleeve.

According to a preferred embodiment, a limiting cavity for limiting the ejector rod is arranged in the second guide sleeve, the limiting cavity is eccentrically arranged in the second guide sleeve, the inner diameter of the limiting cavity is smaller than the inner diameters of the outer pipeline and the ferromagnetic sleeve, and the length of the second guide sleeve is twice of the length of the locking sleeve.

According to a preferred embodiment, the inner diameter of the outer line is larger than the inner diameter of the second guide sleeve and smaller than the inner diameter of the ferromagnetic sleeve, and a protection tube and a positioning cap are connected to the proximal end of the outer line.

According to a preferred embodiment, the sheath and the positioning cap have an internal cavity therein that allows the drive wire to move back and forth.

According to a preferred embodiment, a sliding handle is connected to the proximal end of the positioning cap, and the sliding block is sleeved on the sliding handle and can slide back and forth along the length direction of the sliding handle.

According to a preferred embodiment, the diameter of the ejector rod is larger than that of the drive wire, and the lengths of the ejector rod and the drive wire are at least such that when the slider slides to the farthest end of the sliding handle, the far end of the ejector rod can extend to the inside of the strong magnetic sleeve by half.

Based on the technical scheme, the releaser for releasing the metal clip at least has the following technical effects:

the releaser for releasing the metal clip comprises an operation part, an outer pipeline and an action part, wherein one end of the outer pipeline is connected with the operation part, the other end of the outer pipeline is connected with the action part, the operation part comprises a sliding block and a driving wire, the sliding block is connected with one end of the driving wire, the other end of the driving wire penetrates through an inner cavity of the outer pipeline and extends towards the direction of the action part, the action part comprises a top rod positioned at the tail end of the driving wire, and under the action of the operation part, the driving wire can drive the top rod to extend outwards and act on a movable shaft of the metal clip to enable the movable shaft to move towards the far end along a sliding rail on the inner wall of a locking sleeve so as to enable two clamping pieces of the metal clip to be opened. Consequently, to the metal clip that does not drop by oneself, medical personnel insert the human body with the outer pipeline distal end and the action portion of this application releaser through digestion scope biopsy hole and extend to the metal clip position, make the action portion align and the lock sleeve of fixed metal clip, drive line and ejector pin through operation portion and outwards stretch out, and be used in the loose axle of metal clip, make the loose axle move to the distal end along the slide rail, and then make the round pin axle of metal clip slide to the near-end of arc spout, open two clamping pieces of metal clip. Therefore, the metal clip can be effectively released, the metal clip which does not fall off can be taken off in time, and the health of a patient is prevented from being influenced.

Drawings

In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art metal clip in a closed state;

FIG. 2 is a schematic view showing the structure of a releaser for releasing a metal clip of the present invention;

FIG. 3 is a sectional view of an operation part of the ejector for ejecting the clip according to the present invention.

In the figure: 1-a clip; 2-a locking sleeve; 3-a pin shaft; 4-a movable shaft; 5-arc chute; 10-a first guide sleeve; 11-strong magnetic sleeve; 12-a second guide sleeve; 13-a top bar; 14-outer line; 15-a drive line; 16-a protective tube; 17-a positioning cap; 18-a slide block; 19-a sliding handle; 20-an operating part; 21-a limiting cavity; 30-action part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The technical scheme of the invention is explained in detail in the following with the accompanying drawings of the specification.

As shown in fig. 2 and 3, the present invention provides a releaser for releasing a metal clip, comprising an operating part 20, an outer wire 14 and an acting part 30, wherein one end of the outer wire 14 is connected with the operating part 20, and the other end is connected with the acting part 30. The operating part 20 comprises a slide block 18 and a driving wire 15, the slide block 18 is connected with one end of the driving wire 15, the other end of the driving wire 15 passes through the inner cavity of the outer pipe 14 and extends towards the direction of the operating part 30, the operating part 30 comprises a push rod 13 which is positioned at the tail end of the driving wire 15 and is connected with the driving wire 15, and under the action of the operating part 20, the driving wire 15 can drive the push rod 13 to extend outwards and act on the movable shaft 4 of the metal clip, so that the movable shaft 4 moves towards the far end along the sliding rail on the inner wall of the locking sleeve 2, and the two clamping pieces 1 of the metal clip are opened. To the metal clip that does not drop by oneself, medical personnel place the outer pipeline distal end and the action portion of this releaser in the human body and extend to the metal clip position, make the action portion align the lock sleeve of metal clip, drive wire and kicking bar through operation portion and remove to the distal end to act on the loose axle of metal clip, make the loose axle remove to the distal end along the slide rail, and then make the round pin axle of metal clip slide to the near-end of arc spout, open two clamping pieces of metal clip. Therefore, the metal clip can be effectively released, the metal clip which does not fall off can be taken off in time, and the health of a patient is prevented from being influenced.

Here, the "distal end" refers to an end away from the operation portion 20, and the "proximal end" refers to an end close to the operation portion 20.

More preferably, the operating unit 30 further comprises a first guide sleeve 10, a strong magnetic sleeve 11 and a second guide sleeve 12 connected to the distal end of the outer wire 14 in sequence from the distal end to the proximal end, wherein the strong magnetic sleeve 11 is located between the first guide sleeve 10 and the second guide sleeve 12, and the second guide sleeve 12 is connected to the outer wire 14. The first guide sleeve 10 has a guiding function of moving the strong magnetic sleeve toward the locking sleeve of the metal clip. The second guide sleeve 12 has a guide function for outward movement of the knock rod 13. The ferromagnetic sleeve 11 can fix the locking sleeve so that the two clamps of the metal clamp can take out the whole metal clamp together with the outer pipe line after being released.

Preferably, as shown in fig. 3, the first guide bush 10 is formed in a conical shape having an inner diameter gradually increasing from the connection portion with the ferromagnetic bush 11 toward the outside. Specifically, the outer wall of the first guide sleeve 10 is inclined outward from the connection with the ferromagnetic sleeve 11 by an inclination angle of 10 °. The length of the first guide sleeve 10 is 2/5 of the length of the locking sleeve 2. The first guide sleeve is not magnetic, and has the function that when the action part is close to the locking sleeve of the metal clamp, the strong magnetic sleeve 11 is more easily butted with the locking sleeve to play a guiding role.

Further preferably, the strong magnetic sleeve 11 has a sleeve structure with strong magnetism to the locking sleeve 2, and the inner diameter of the strong magnetic sleeve 11 is not smaller than the outer diameter of the locking sleeve 2 of the metal clip, so that when the strong magnetic sleeve 11 is close to the locking sleeve 2 of the metal clip, under the pulling action of the magnetic force, the strong magnetic sleeve 11 moves to the front of the locking sleeve 2 and fixes the locking sleeve 2. Preferably, the sum of the lengths of the first guide sleeve 10 and the strong magnetic sleeve 11 is not greater than the length of the locking sleeve 2. Thereby avoiding the interference caused by the opening of the two clips of the metal clip.

More preferably, as shown in fig. 3, a limiting cavity 21 for limiting the ejector rod 13 is arranged inside the second guide sleeve 12, the limiting cavity 21 is eccentrically arranged inside the second guide sleeve 12, the inner diameter of the limiting cavity 21 is smaller than the inner diameters of the outer pipeline 14 and the strong magnetic sleeve 11, and the length of the second guide sleeve 12 is twice the length of the locking sleeve 2. Thereby enabling the second guide sleeve 12 to guide the movement of the ejector pin 13. Preferably, the inner diameter of the limiting cavity 21 is slightly larger than the diameter of the ejector rod 13, so that a clearance fit is formed between the ejector rod 13 and the second guide sleeve 12. Meanwhile, the axis of the limiting cavity 21 is not in the same line with the axes of the strong magnetic sleeve 11 and the outer pipeline 14, and the arrangement is such that the ejector rod 13 can be extended out in an eccentric mode when extending out of the second guide sleeve.

It is further preferred that the inner diameter of the outer pipeline 14 is larger than the inner diameter of the second guide sleeve 12 and smaller than the inner diameter of the ferromagnetic sleeve 11. Preferably, the external line 14 may be a spring tube for inserting the operation portion through the biopsy hole of the endoscope to the position of the metal clip in the digestive tract of the patient, and allowing the medical staff to operate the operation portion from the outside.

Preferably, as shown in FIG. 2, a protective tube 16 and a positioning cap 17 are attached to the proximal end of the outer tubing line 14. The sheath 16 and the positioning cap 17 have a lumen therein that allows the drive wire 15 to move back and forth. The protection tube 16 is used to protect the outer pipeline. The locating cap is used for limiting the sliding block 18. Preferably, a sliding handle 19 is connected to the proximal end of the positioning cap 17, and the sliding block 18 is sleeved on the sliding handle 19 and can slide back and forth along the length direction of the sliding handle 19. When the slide block 18 slides downwards, i.e. the slide block 18 moves to the far end of the sliding handle 19, the slide block 18 drives the driving wire and the ejector rod to extend out and act on the movable shaft of the metal clip.

Preferably, the diameter of the knock-out pin 13 is larger than the diameter of the driving wire 15. Preferably, the lengths of the ejector rod 13 and the driving wire 15 are at least such that when the slider 18 slides to the most distal end of the sliding handle 19, the distal end of the ejector rod 13 can extend to the inside of the ferromagnetic sleeve 11 by half, and when the slider 18 slides to the most proximal end of the sliding handle 19, the distal end of the ejector rod 13 is located in the inner cavity of the outer pipe 14. Preferably, the ejector pin 13 has a diameter such that it extends inside the locking sleeve 2. Preferably, the diameter of knockout pin 13 is less than the both ends of loose axle 4 and cup joints the distance between two clamping pieces at loose axle 4 middle part, and then make eccentric knockout pin 13 that stretches out can act on loose axle 4, withstand loose axle 4 and promote forward through knockout pin 13, so that the arc spout 5 of two clamping pieces 1 moves forward, and make the round pin axle remove to the near-end from the distal end of arc spout 5, and then can make two clamping pieces 1 open, make the metal clip obtain the release, then it is external with the metal clip is fixed and take out to utilize the magnetic action of strong magnetic sleeve, thereby effectively avoid the influence to the health.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A releaser for releasing a metal clip, characterized in that it comprises an operating part (20), an outer wire (14) and an action part (30), one end of the outer wire (14) being connected to the operating part (20) and the other end being connected to the action part (30), wherein,

the operation portion (20) includes slider (18) and drive wire (15), slider (18) with the one end of drive wire (15) is connected, the other end of drive wire (15) passes the inner chamber of outer pipeline (14) to the direction of action portion (30) extends, action portion (30) including be located drive wire (15) end and with ejector pin (13) that drive wire (15) are connected under the effect of operation portion (20), drive wire (15) can drive ejector pin (13) move to the distal end direction to act on movable shaft (4) of metal clip, make movable shaft (4) move to the distal end along the slide rail of locking cover (2) inner wall, so that two clamping pieces (1) of metal clip open.

2. A release according to claim 1, wherein the action part (30) further comprises a first guide sleeve (10), a strong magnetic sleeve (11) and a second guide sleeve (12) connected in sequence from the far to the near at the far end of the outer wire (14), wherein the strong magnetic sleeve (11) is located between the first guide sleeve (10) and the second guide sleeve (12), and the second guide sleeve (12) forms a connection with the outer wire (14).

3. A release according to claim 2, characterized in that the first guide sleeve (10) is conical, with an increasing inner diameter from the connection with the ferromagnetic sleeve (11) outwards.

4. A release according to claim 3, characterized in that the outer wall of the first guide sleeve (10) is inclined outwards from the connection with the ferromagnetic sleeve (11) by an angle of 10 °, the length of the first guide sleeve (10) being 2/5 of the length of the locking sleeve (2).

5. A release according to claim 2, characterized in that the strong magnetic sleeve (11) is a sleeve structure with strong magnetism to the locking sleeve (2), and the inner diameter of the strong magnetic sleeve (11) is not less than the outer diameter of the locking sleeve (2) of the metal clip,

the sum of the lengths of the first guide sleeve (10) and the strong magnetic sleeve (11) is not more than the length of the locking sleeve (2).

6. A releaser according to claim 2, characterized in that the second guide sleeve (12) is internally provided with a limiting cavity (21) for limiting the ejector rod (13), and the limiting cavity (21) is eccentrically arranged in the second guide sleeve (12), the inner diameter of the limiting cavity (21) is smaller than the inner diameters of the outer pipeline (14) and the ferromagnetic sleeve (11), and the length of the second guide sleeve (12) is twice the length of the locking sleeve (2).

7. A release according to claim 2, characterized in that the outer tubing line (14) has an inner diameter larger than the inner diameter of the second guiding sleeve (12) and smaller than the inner diameter of the ferromagnetic sleeve (11), a protective tube (16) and a positioning cap (17) being connected at the proximal end of the outer tubing line (14).

8. A releaser according to claim 7, characterized in that the protective tube (16) and the positioning cap (17) have a lumen inside that allows the driving wire (15) to move back and forth.

9. A release according to claim 7, characterized in that a sliding handle (19) is connected to the proximal end of the positioning cap (17), the sliding block (18) is sleeved on the sliding handle (19) and can slide back and forth along the length direction of the sliding handle (19).

10. A release according to claim 1, wherein the diameter of the knock bar (13) is larger than the diameter of the driving wire (15), the length of the knock bar (13) and the driving wire (15) ensuring at least that the distal end of the knock bar (13) can extend half way inside the strong magnetic sleeve (11) when the slider (18) is slid to the most distal end of the sliding handle (19).