CN214595939U - Hemostatic clamp - Google Patents

Abstract

The utility model relates to a hemostatic clamp, which comprises a traction mechanism, wherein the far end of the traction mechanism is provided with an inner hole; the clamping mechanism comprises a tightening pipe and a chuck component; the tightening pipe is provided with a first locking part; the collet assembly is partially disposed inside the cinch tube and includes an engagement portion and a collet body; the proximal end of the joint part is inserted into the inner hole and is in interference fit with the inner hole; the chuck body is connected with the far end of the joint part, and the far end of the chuck body extends out of the far end of the tightening pipe; the chuck component is provided with a second locking part; when the second locking part is separated from the first locking part, the chuck body can be switched between an opening state and a closing state; when the chuck body is in a closed state and the second locking portion is connected with the first locking portion, the chuck assembly is locked, and when the traction mechanism is subjected to a pulling force greater than a first predetermined value, the proximal end of the engagement portion is disengaged from the inner bore. When the connection between the joint part and the traction mechanism is released, no part is broken, the problems of inflammation and the like caused by the broken object staying in the body are avoided, and the use safety is improved.

Description

Hemostatic clamp

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to hemostatic clamp.

Background

With the continuous progress of the endoscopic minimally invasive technique, endoscopic inferior border treatment operations such as Endoscopic Submucosal Dissection (ESD), Endoscopic Retrograde Cholangiopancreatography (ERCP), natural orifice endoscopic surgery (NOTES) and the like have been widely performed. The safe and effective closure of the defect or perforation of the alimentary canal tissue in the operation is a key problem which must be solved in various endoscope micro-trauma operations.

A hemostatic clip is an instrument used to close defects or perforations in luminal tissue. The clamping head of the hemostatic clamp in the prior art can realize opening, closing and rotating functions, and after the hemostatic clamp is conveyed to a target position, the clamping head is driven to move through a traction mechanism so as to realize the opening, closing and rotating functions, and clamp a tissue at the target position, and then the clamping head is separated from the traction mechanism and is kept in a body until the tissue at the target position completely grows, so that a defect or a perforation at the position is closed, falls off and is automatically discharged out of the body through an alimentary canal.

The clamping head of the hemostatic clamp in the prior art can be connected with the traction mechanism through the hook, and the connection between the clamping head and the traction mechanism is released through the breakage of the hook, but the broken hook can cause inflammation and other problems once falling into a wound. Or the chuck can be connected with the traction mechanism by matching the ball head with the connecting yoke, and the connection is released by deforming the connecting yoke, but the processing technology of the connecting yoke is complex.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hemostatic clamp, its simple structure is reliable, does not have the remaining risk of fracture thing when using.

In order to achieve the above object, the utility model provides a hemostatic clamp, include:

the far end of the traction mechanism is provided with an inner hole; and the number of the first and second groups,

the clamping mechanism comprises a tightening pipe and a chuck component; the tightening pipe is provided with a first locking part; the collet assembly is partially disposed inside the tightening tube and includes an engagement portion and a collet body; the proximal end of the joint part is inserted into the inner hole and is in interference fit with the inner hole; the collet body is connected to the distal end of the engagement portion, and the distal end of the collet body extends from the distal end of the cinch tube; the chuck component is also provided with a second locking part;

the hemostatic clip is configured to allow the traction mechanism to drive the clip head assembly to reciprocate along the axial direction of the tightening tube under the action of external force when the second locking part and the first locking part are separated from each other, so that the clip head body is switched between an open state and a closed state;

the hemostatic clip is further configured to prevent axial movement of the collet assembly along the cinch tube when the collet body is in the closed state and the second locking portion is coupled to the first locking portion, and to disengage the proximal end of the engagement portion from the inner bore when the distraction mechanism is subjected to a pulling force greater than a first predetermined value.

Optionally, the hemostatic clamp further comprises a hub assembly having a distal end releasably connected to the proximal end of the cinch tube and in communication with the cinch tube and configured to be relatively rotatable with the cinch tube; the traction mechanism is partially arranged inside the joint sleeve assembly and can move along the axial direction of the joint sleeve assembly;

the hemostatic clip is configured such that the traction mechanism urges the clip assembly to rotate about an axis of the traction mechanism under an external force while the cinch tube spins.

Optionally, a first limiting part is arranged on the connecting sleeve assembly, and a second limiting part is arranged on the traction mechanism; the second limiting portion and the first limiting portion are matched with each other to prevent the second locking portion from being connected with the first locking portion.

Optionally, the adapter sleeve assembly comprises a sleeve, a distal end of the sleeve is inserted into the tightening pipe from a proximal end of the tightening pipe, and a distal end face of the sleeve constitutes the first limiting part;

the far end of the traction mechanism is provided with a first bending wing which is bent towards the outside of the traction mechanism, and the first bending wing is configured to have elasticity and form the second limiting part;

the hemostatic clip is configured to prevent the clip assembly from moving toward the proximal end of the cinch tube when the first bending wing abuts the distal end face of the sleeve, and the second locking portion is distal to the first locking portion; when the traction mechanism is subjected to a pulling force greater than a second preset value, the first bending wing deforms and allows the traction mechanism to drive the chuck component to move towards the proximal end of the tightening tube until the second locking part is connected with the first locking part; the second predetermined value is less than the first predetermined value.

Optionally, the clamping mechanism further comprises a third limiting portion disposed on the cinch tube and located at a distal side of the engaging portion for limiting a maximum distance of movement of the cartridge assembly toward the distal end of the cinch tube to prevent the cartridge assembly from being withdrawn from the distal end of the cinch tube.

Optionally, the first locking portion comprises a locking hole disposed on a side wall of the cinch tube; the second locking part comprises a clamping block arranged on the surface of one side, close to the inner wall of the tightening pipe, of the chuck body;

the third limiting part is further used for limiting the relative position of the chuck component and the tightening pipe in the circumferential direction, so that the clamping block can be clamped into the locking hole.

Optionally, the third limiting part extends along the radial direction of the tightening pipe, and forms two channels with the pipe wall of the tightening pipe;

the chuck body comprises two clamping arms which are oppositely arranged, and the far ends of the two clamping arms respectively penetrate through the two channels and extend out of the far end of the tightening pipe.

Optionally, the third limiting part comprises a pin; or the third limiting part comprises two first blocking walls arranged at the far end of the tightening pipe, and the two first blocking walls are symmetrically arranged.

Optionally, the nipple assembly comprises a sleeve and a resilient connector; the sleeve comprises a distal section and a proximal section, wherein the outer diameter of the distal section is smaller than that of the proximal section, so that a step surface is formed on the outer wall of the sleeve; a first through hole is formed in the distal section; the elastic connecting piece comprises a base part and a rod part, the base part is arranged inside the sleeve, and a second through hole for the traction mechanism to penetrate through is formed in the base part; the rod part is arranged on one side of the base part close to the far end of the sleeve and extends along the axial direction of the sleeve, and the far end of the rod part forms a second bending wing; the second bending wing penetrates through the connecting hole and extends to the outside of the sleeve to form an accommodating groove with the step surface;

the proximal end of the tightening pipe is provided with a fourth limiting part protruding inwards, the proximal end of the tightening pipe is sleeved on the distal end section of the sleeve, and the fourth limiting part is arranged at the accommodating groove.

Optionally, the traction mechanism comprises a core wire and a connecting tube, the connecting tube is arranged at the far end of the core wire and is provided with the inner hole; the core wire passes through the second through hole, the connecting pipe is positioned at the far end side of the base, and the outer diameter of the connecting pipe is larger than the aperture of the second through hole;

the hemostatic clip is configured such that when the proximal end of the engagement portion is disengaged from the inner bore and the proximal end of the connecting tube is positioned against the base, the pulling mechanism is subjected to a pulling force greater than a third predetermined value to deform the second bending wing and release the hub assembly from the cinch tube.

Optionally, the hemostatic clip further comprises a handle assembly comprising a gripping portion, a sliding portion, and a rotating portion; the gripping part is provided with a sliding groove extending along the axial direction, and the sliding part is arranged on the sliding groove and can slide along the sliding groove; the rotating part is rotatably arranged at the far end of the holding part; the proximal end of the traction mechanism penetrates out of the proximal end of the sleeve assembly and further extends into the handle assembly to be connected with the sliding part and the rotating part of the handle assembly;

the hemostatic clamp is configured to drive the traction mechanism to move along the axial direction of the adapter sleeve assembly when the sliding part slides along the sliding groove so as to drive the clamp head assembly to move along the axial direction of the tightening tube; when the rotating part rotates relative to the holding part, the rotating part drives the traction mechanism to rotate so as to drive the chuck component and the tightening pipe to rotate.

Optionally, the pulling mechanism comprises a core wire, a connecting tube, a first connecting block and a second connecting block; wherein the connecting tube is arranged at the far end of the core wire and is provided with the inner hole; the first connecting block and the second connecting block are both arranged at the proximal end of the core wire, and the second connecting block is positioned at the proximal end side of the first connecting block; the first connecting block is connected with the rotating part, is configured to synchronously rotate along with the rotating part and can move relative to the rotating part in the axial direction; the second connecting block is connected with the sliding part, is configured to be kept relatively static with the sliding part in the axial direction and can rotate relatively with the sliding part in the circumferential direction; and/or the presence of a gas in the gas,

the adapter sleeve assembly further comprises a spring tube, the distal end of the spring tube is connected with the proximal end section of the sleeve, and the proximal end of the spring tube is provided with a positioning tube; the positioning tube is connected with a rotating part of the handle assembly, is configured to be relatively static with the rotating part in the axial direction, and can rotate relative to the rotating part in the circumferential direction.

Compared with the prior art, the utility model discloses a hemostatic clamp has following advantage:

the hemostatic clamp comprises a traction mechanism and a clamping mechanism; wherein the far end of the traction mechanism is provided with an inner hole; the clamping mechanism comprises a tightening pipe and a chuck component; the tightening pipe is provided with a first locking part; the collet assembly is partially disposed inside the tightening tube and includes an engagement portion and a collet body; the proximal end of the joint part is inserted into the inner hole and is in interference fit with the inner hole; the collet body is connected to the distal end of the engagement portion, and the distal end of the collet body extends from the distal end of the cinch tube; and a second locking part is also arranged on the chuck component. Initially, the second locking part and the first locking part are separated from each other, and an operator can drive the chuck component to reciprocate along the axial direction of the tightening pipe by applying external force to the traction mechanism, so that the chuck body is switched between an open state and a closed state; when the chuck body clamps the tissue at the target position and is switched to the closed state, the operator applies a pulling force to the traction mechanism to connect the second locking part with the first locking part, at the moment, the chuck body is locked in the closed state, and then the operator applies a pulling force larger than a first preset value to the traction mechanism to enable the proximal end of the joint part to be disengaged from the inner hole, so that the connection between the chuck assembly and the traction mechanism is released. The chuck component is connected through the joint part and the interference fit between the inner holes of the traction mechanism, the structure is simple, when the connection is released, only appropriate pulling force needs to be applied, the fracture of the structural component can not occur, the problem that the fractured component remains and enters the wound in the body does not exist, and the chuck component is safe and reliable.

Drawings

The accompanying drawings are included to provide a better understanding of the present invention and are not intended to constitute an undue limitation on the invention. Wherein:

FIG. 1 is a schematic diagram of a hemostatic clip according to one embodiment of the present invention, showing a clip assembly in an open position;

FIG. 2 is a schematic diagram of a hemostatic clip according to one embodiment of the present invention, illustrating the clip assembly in a closed position;

fig. 3 is a schematic view of a partial structure of a hemostatic clip according to an embodiment of the present invention;

fig. 4 is a partial cross-sectional view of a hemostatic clip provided in accordance with an embodiment of the present invention;

fig. 5 is a partial cross-sectional view of a hemostatic clip provided in accordance with an embodiment of the present invention, showing the clip assembly in a closed position and the first locking portion not connected to the second locking portion;

FIG. 6 is a partial cross-sectional view of a hemostatic clip according to one embodiment of the present invention shown with the clip assembly in a closed position and with the first locking portion coupled to the second locking portion and with the proximal end of the engagement portion disengaged from the inner bore of the traction mechanism;

fig. 7 is a partial schematic view of a hemostatic clip according to an embodiment of the invention, showing a first locking portion coupled to a second locking portion;

fig. 8 is a schematic structural view of a connection tube of a hemostatic clip according to an embodiment of the present invention;

fig. 9 is a partial schematic structural view of a hemostatic clip according to an embodiment of the present invention, illustrating mainly the proximal end of the traction mechanism;

FIG. 10 is a cross-sectional view of a cinch tube of a hemostatic clip provided in accordance with an embodiment of the present invention;

fig. 11 is a schematic view of the fitting relationship between the tightening tube and the third limiting portion of the hemostatic clamp according to an embodiment of the present invention, wherein (a) is a schematic view of the second blocking wall when it is not bent, and (b) is a schematic view of the second blocking wall bent to form the third limiting portion;

FIG. 12 is a schematic view of a coupling portion of a hemostatic clip according to one embodiment of the present invention;

FIG. 13 is a partial cross-sectional view of a hemostatic clamp according to one embodiment of the present invention, illustrating primarily the connection of the hub assembly to the cinch tube;

fig. 14 is a schematic view of a resilient connecting member of a hemostatic clip according to an embodiment of the present invention;

fig. 15 is a schematic view of a handle assembly of a hemostatic clip according to an embodiment of the present invention;

fig. 16 is an exploded view of a handle assembly of a hemostatic clip according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

Furthermore, each embodiment described below has one or more technical features, which does not mean that all technical features of any embodiment need to be implemented simultaneously by a person using the present invention, or that all technical features of different embodiments can be implemented separately. In other words, in the implementation of the present invention, based on the disclosure of the present invention, and depending on design specifications or implementation requirements, a person skilled in the art can selectively implement some or all of the technical features of any embodiment, or selectively implement a combination of some or all of the technical features of a plurality of embodiments, thereby increasing the flexibility in implementing the present invention.

As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural forms "a plurality" includes more than two referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention. The same or similar reference numbers in the drawings identify the same or similar elements.

As used herein, the terms "proximal" and "distal" refer to the relative orientation, relative position, and orientation of elements or actions with respect to one another from the perspective of a clinician using the medical device, and although "proximal" and "distal" are not intended to be limiting, the term "proximal" generally refers to the end of the medical device that is closer to the clinician during normal operation, and the term "distal" generally refers to the end that is first introduced into a patient.

Referring to fig. 1 to 7, an embodiment of the present invention provides a hemostatic clamp, which includes a traction mechanism 1000 and a clamping mechanism 2000. An inner bore 1001 is provided on the distal end of the distraction mechanism 1000. The clamping mechanism 2000 includes a take-up tube 2100 and a collet assembly 2200. A first locking portion is provided on the cinch tube 2100. The collet assembly 2200 is partially disposed inside the take-up tube 2100 and includes an engagement portion 2210 and a collet body. The proximal end of the engagement portion 2210 is inserted into the bore 1001 and is interference fit with the bore 1001. The collet body is coupled to the distal end of the engagement portion 2210, and the distal end of the collet body extends outside of the take-up tube 2100 from the distal end of the take-up tube 2100. The chuck assembly 2200 is further provided with a second locking portion.

The hemostatic clip is configured to allow the traction mechanism to drive the clip assembly 2200 to move axially along the cinch tube 2100 under the external force when the second locking portion and the first locking portion are separated from each other, so as to switch the clip body between the open state and the closed state. Therefore, the chuck body can be adjusted in posture to clamp the target object.

The hemostatic clip is further configured to prevent axial movement of the clip assembly 2200 along the cinch tube 2100 when the clip body is in the closed state and the second locking portion and the first locking portion are connected. In this way, when the chuck body clamps the target object, the chuck body can be locked in the closed state through the connection of the second locking part and the first locking part, so as to maintain the clamping of the target object. At this time, the operator applies a pulling force greater than a first predetermined value to the distraction mechanism 1000, so that the proximal end of the engagement portion 2210 can be disengaged from the inner hole 1001, thereby releasing the connection between the chuck assembly 2200 and the distraction mechanism 1000. It should be understood that the first predetermined value is determined by the interference fit force between the engagement portion 2210 and the inner hole 1001, and when the pulling force is greater than the first predetermined value, the pulling force can overcome the interference fit force. The embodiment of the utility model provides an among the hemostatic clamp, cartridge assembly 2200 with drive mechanism 1000's connected mode is simple reliable, and convenient to use does not have the cracked problem of structure when removing both connections, just also can not appear the fractured entering wound and cause the problem of inflammation, improves the safety in utilization.

Referring with emphasis to fig. 4-6, the hemostatic clip further includes a hub assembly 3000, a distal end of the hub assembly 3000 being releasably connected to a proximal end of the cinch tube 2100 and in communication with the cinch tube 2100. The pulling mechanism 1000 is partially disposed inside the nipple assembly 3000 and is capable of moving in an axial direction of the nipple assembly 3000. The term "releasably coupled" means that the hub assembly 3000 is releasably coupled to the cinch tube 2100 under predetermined conditions.

The adapter sleeve component 3000 is provided with a first limiting portion, the traction mechanism 1000 is provided with a second limiting portion, and the second limiting portion is matched with the first limiting portion to prevent the second locking portion from being connected with the first locking portion. Before the second locking portion is connected to the first locking portion, the collet assembly may reciprocate in the axial direction of the cinch tube 2100 to adjust the posture of the collet assembly.

Optionally, the clamping mechanism further comprises a third stopper portion provided on the take-up tube 2100 on the distal side of the engagement portion 2210 for restricting the maximum distance of movement of the cartridge assembly 2200 toward the distal end of the take-up tube 2100 to prevent the cartridge assembly 2200 from coming out of the distal end of the take-up tube 2100. In addition to this, the third stopper portion is configured to circumferentially restrict the relative position of the collet assembly 2200 and the take-up tube 2100 so that the second locking portion is circumferentially aligned with the first locking portion, thereby enabling smooth connection therebetween. In this embodiment, the cinch tube 2100 is further configured to rotate relative to the hub assembly 3000 such that the pull mechanism 1000 spins under an external force to rotate the collet assembly 2200 without the cinch tube 2100 interfering with the rotational movement of the collet assembly 2200. In other words, the pulling mechanism 1000 rotates the collet assembly 2200 about the axis of the pulling mechanism 1000 while also rotating the take-up tube 2100.

Additionally, the hemostatic clip also includes a handle assembly 4000 for coupling to the proximal end of the traction mechanism 1000. The operator can operate the handle assembly 4000 to apply force to the traction mechanism 1000, which in turn drives the gripping assembly 2000 to perform various actions.

Next, the structure and the assembly relationship of the components of the hemostatic clamp will be described in detail with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the following structural components are merely illustrative of the structures that may be used in the embodiments of the present invention, and are not intended to be a necessary choice and should not be construed as limiting the invention.

Referring next to fig. 4-6 in conjunction with fig. 8, the pulling mechanism 1000 includes a core wire 1100 and a connecting tube 1200. The connection tube 1200 is disposed on the distal end of the core wire 1100 and has the inner hole 1001, and the outer diameter of the connection tube 1200 is larger than that of the core wire 1100. The distal end of the traction mechanism 1000, specifically, the distal end of the connection tube 1200 is provided with a plurality of first bending wings 1210 bending to the outside of the connection tube 1200, and the plurality of first bending wings 1210 are arranged at intervals along the circumferential direction of the connection tube 1200, preferably uniformly arranged. Each of the first bending wings 1210 may have a bending angle of 90 °, and the first bending wings 1210 may be configured to have elasticity.

Referring to fig. 9 again, the pulling mechanism 1000 further includes a first connecting block 1300 and a second connecting block 1400. The first connection block 1300 and the second connection block 1400 are both disposed at the proximal end of the core wire 1100, and the first connection block 1300 is located at the proximal side of the second connection block 1400. The first connecting block 1300 has a non-circular shape, i.e., the cross section of the first connecting block is non-circular, and may be, for example, a triangle, a quadrangle, a hexagon, etc. The second connection block 1400 may have a circular cross-section. The first connecting block 1300 and the second connecting block 1400 are connected to the handle assembly 4000, and the specific connection relationship will be described later. Preferably, the core wire 1100 includes a core wire body and a core wire sheath covering the outer surface of the core wire body, and the core wire sheath is provided to reduce the friction force when the traction mechanism 1000 moves along the axial direction of the sleeve assembly 3000, and reduce the probability of bending of the core wire 1100.

In addition, the traction mechanism 1000 further includes a reinforcing sleeve 1500, which is sleeved on a portion of the core wire 1100 between the first connecting block 1300 and the second connecting block 1400, and two axial ends of the reinforcing sleeve 2500 are respectively connected with the first connecting block 1300 and the second connecting block 1400. The reinforcing sleeve 1500 is used for enhancing the strength of the traction mechanism 1000 and avoiding bending.

Referring to fig. 3, the cinch tube 2100 may be cylindrical in configuration and have a first lumen extending axially therethrough. The first locking portion includes a locking aperture 2101 disposed on the proximal sidewall of the cinch tube 2100. The proximal end of the cinch tube 2100 may also have a fourth stop 2102 (shown in FIG. 6) projecting radially inward of the cinch tube 2100.

In some embodiments, the cinch tube 2100 has a uniform inner diameter throughout its axial length, and the fourth stop may be a second stop wall (not shown) disposed at the proximal end of the cinch tube 2100. In other embodiments, as shown in FIG. 10, an annular recess 2103 is formed in the inner wall of the proximal end of the cinch tube 2100, and the wall of the cinch tube 2100 proximal of the annular recess 2103 forms the fourth stop 2102.

Referring to fig. 3 to 7, the third position-limiting portion is disposed at the distal end of the tightening tube 2100 and extends along the radial direction of the tightening tube 2100, and the third position-limiting portion and the tube wall of the tightening tube 2100 together form two channels 2104 (as shown in fig. 11 (b)). In some embodiments, as shown in fig. 3 to 7, the third limiting portion includes a pin 2300, and two axial ends of the pin 2300 are respectively connected to the tube wall of the tightening tube 2100, so that two isolated channels 2104 are formed between the pin 2300 and the tube wall. In other embodiments, as shown in fig. 11, the third limiting portion comprises two first blocking walls 2105 disposed at the distal end of the tightening tube 2100, and the two first blocking walls 2105 are preferably symmetrically disposed and can abut against each other. During machining, a portion of the material may be cut from a complete cylindrical tube to form two first blocking walls 2105, wherein the still cylindrical portion of the tube may serve as the cinch tube 2100, and the first blocking walls 2105 extend in the axial direction of the tube, and then force may be applied to the first blocking walls 2105 to bend the tube radially inward along the cinch tube 2100.

Fig. 12 shows a schematic view of the joint 2210. As shown in fig. 12, the joint 2210 includes a first connecting shaft 2211, a third connecting block 2212, and a second connecting shaft 2213, the first connecting shaft 2211 and the second connecting shaft 2213 are connected to the third connecting block 2212, respectively, and the first connecting shaft 2211 and the second connecting shaft 2213 are perpendicular to each other. The first connecting shaft 2211 extends out of the third connecting block 2212 at two axial ends respectively and is used for being connected with the chuck assembly (as shown in fig. 4 to 6), the second connecting shaft 2213 is connected with the third connecting block 2212 at a distal end, and the second connecting shaft 2213 is inserted into the inner hole 1001 of the traction mechanism 1000 and is in interference fit with the inner hole 1001 (as shown in fig. 4 and 5).

As shown in fig. 4 to 6, the chuck body includes two clamping arms 2221, and the proximal ends of the two clamping arms 2221 are respectively connected to two axial ends of the first connecting shaft 2211. The clip arm 2221 is configured to have elasticity, and a latch 2222 is provided on a proximal outer surface of the clip arm 2221 to serve as the second locking portion. The "outer surface" refers to the surface of the two arms 2221 that face away from each other, i.e., the surface of the arms 2221 that faces the inner wall of the cinch tube 2100 when assembled to the cinch tube 2100 is the outer surface.

When the pulling mechanism 1000 and the clamping mechanism 2000 are assembled together, the distal ends of the two clamping arms 2221 extend out of the tensioning tube 2100 from the two channels 2104 at the distal end of the tensioning tube 2100, respectively. When an operator pushes on the pulling mechanism 1000 at the proximal end of the pulling mechanism 1000, the pulling mechanism 1000 drives the collet assembly 2200 to move away from the proximal end of the cinch tube 2100 until the walls of the cinch tube 2100 do not apply pressure to the collet arms 2221, so that the collet body is switched to the open state. When an operator applies a pulling force to the pulling mechanism 1000 at the proximal end of the pulling mechanism 1000, the pulling mechanism 1000 may drive the collet assembly 2200 to move in a direction that is closer to the proximal end of the cinch tube 2100. In this process, when the tube wall of the tightening tube 2100 applies pressure to the clip arms 2221, the two clip arms 2221 approach each other to switch to the closed state. It can be appreciated that, under the constraint of the third limiting portion, the cartridge assembly 2200 moves substantially in the axial direction of the take-up tube 2100 without circumferential rotation.

When the collet assembly 2200 moves until the latch 2222 reaches the locking hole 2101, the latch 2222 falls into the locking hole 2101 (as shown in fig. 7). To this end, the collet assembly 2200 is locked and cannot continue to move axially relative to the cinch tube 2100. Subsequently, when the operator applies a pulling force on the proximal end of the traction mechanism 1000, and the pulling force is greater than the first predetermined value, the operator can overcome the interference fit between the proximal end of the engagement portion 2210 (specifically, the proximal end of the second connecting shaft 2213) and the inner hole 1001, so that the second connecting shaft 2213 is disengaged from the inner hole 1001 (as shown in fig. 6), so as to release the connection between the engagement portion 2210 and the traction mechanism 1000. It is understood that the "pushing force" refers to the direction of the force directed distally from the proximal end of the traction mechanism 1000, and the "pulling force" refers to the direction of the force directed proximally from the distal end of the traction mechanism 1000.

Next, referring back to fig. 4-6 in conjunction with fig. 13 and 14, the nipple assembly 3000 includes a sleeve 3100 and a resilient connector 3200. The distal end of the cannula 3100 is inserted into the first lumen of the cinch tube 2100 from the proximal end of the cinch tube 2100. Specifically, the cannula 3100 includes a distal section 3110 and a proximal section 3120 connected to each other, the distal section 3110 having an outer diameter smaller than an outer diameter of the proximal section 3120 such that a stepped surface 3101 is formed on an outer wall of the cannula 3100 and the distal section 3110 can be inserted into the first lumen from a proximal end of the cinch tube 2100. The distal segment 3110 is further provided with a first through hole 3111. The elastic connecting element 3200 comprises a base portion 3210 and a rod portion 3220, wherein the base portion 3210 is disposed in the second inner cavity of the sleeve 3100, and a second through hole 3211 is further disposed on the base portion 3210, a hole diameter of the second through hole 3211 is greater than or equal to an outer diameter of the core wire 1100 and smaller than an outer diameter of the connecting tube 1200, so that the base portion 3210 is sleeved on the core wire 1100. The stem 3220 is disposed on a surface of the base 3210 proximate to the distal end of the cannula 3100, and the stem 3220 extends axially of the cannula 3100. A second bending wing 3221 bent outward is formed at the distal end of the rod portion 3220, and a bending angle of the second bending wing 3221 is 90 ° to 120 ° (an included angle between the second bending wing 3221 and the rod portion 3220). The second bending wing 3221 passes through the first through hole 3111 and extends to the outside of the sleeve 3100 to form a receiving groove with the stepped surface 3101 of the sleeve 3100. This receiving groove is used to cooperate with the fourth position-limiting portion of the take-up tube 2100 to achieve the connection between the take-up tube 2100 and the joint assembly 3000 (i.e., when the take-up tube 2100 is connected to the joint assembly 3000, the fourth position-limiting portion is limited between the second bending wing 3221 and the step surface 3101). When the second bending wing 3221 is deformed by an external force to make the included angle between the second bending wing 3221 and the rod portion 3220 increase to a proper angle, the second bending wing 3221 is separated from the first through hole 3111 from the inner side of the joint assembly 3000 to release the connection between the tightening tube 2100 and the joint assembly 3000.

Referring now to FIG. 5, when the pulling mechanism 1000 is pulled axially along the hub assembly 3000 toward the proximal end of the hub assembly 3000 to drive the engagement portion 2210 and the collet assembly toward the proximal end of the take-up tube 2100, the first bending wing 1210 of the connection tube 1200 abuts against the distal end face of the hub assembly 3000 (specifically, the distal end face of the sleeve 3100) when the latch 2222 of the collet assembly does not reach the locking hole 2101 of the take-up tube 2100, to prevent the pulling mechanism 1000 from moving further toward the proximal end of the hub assembly 3000, thereby preventing the latch 2222 from connecting with the locking hole 2101. That is, the distal end surface of the adapter assembly 3000 constitutes the first stopper, and the first bending wing 1210 constitutes the second stopper. When the pulling mechanism 1000 is pulled by a pulling force greater than a second predetermined value, the first bending wing 1210 deforms, so that an included angle formed between the first bending wing 1210 and the outer surface of the connection tube 1200 increases, until the distal end of the sleeve assembly 3000 releases the limit on the first bending wing 1210, so that the pulling mechanism 1000 can continue to move towards the proximal end of the sleeve assembly 3000. The second predetermined value is determined according to actual needs, but generally the second predetermined value is smaller than the first predetermined value.

Further, referring back to FIG. 13 in conjunction with FIG. 9, the hub assembly 3000 further includes a spring tube 3300, the distal end of the spring tube 3300 being connected to the proximal end of the cannula 3100 (i.e., the proximal end of the proximal segment 3120), the proximal end of the spring tube 3300 being provided with a positioning tube 3310, which positioning tube 3310 may be circular in cross-section and adapted to be connected to the handle assembly 4000.

Next, referring to fig. 15, the handle assembly 4000 includes a grip portion 4100, a sliding portion 4200, and a rotating portion 4300. The holding portion 4100 is provided with a sliding groove 4110 extending in an axial direction, and the sliding portion 4200 is connected to the sliding groove 4110 and can slide along the sliding groove 4110. The rotating portion 4300 is rotatably provided at a distal end of the grip portion 4100. Referring to fig. 1 and 2, the proximal end of the pulling mechanism 1000 (i.e., the proximal end of the core wire 1100) extends out of the proximal end of the hub assembly 3000 (in this way, the first connecting block 1300 is located at the distal end side of the positioning tube 3310), and is connected to the sliding part 4200 and the rotating part 4300 of the handle assembly 4000, respectively. Such that the hemostatic clamp can be configured such that when the sliding portion 4200 slides along the sliding groove 4110, the sliding portion 4200 brings the traction mechanism 1000 to move along the axial direction of the hub assembly 3000. When the rotating portion 4300 rotates with respect to the grip portion 4100, the rotating portion 4300 rotates the traction mechanism 1000.

Referring to fig. 10 and 16, a first limiting cavity 4301 and a second limiting cavity 4302 are disposed inside the rotating portion 4300, a third limiting cavity 4201 is disposed inside the sliding portion 4200, and the first limiting cavity 6301, the second limiting cavity 4302, and the third limiting cavity 4201 are communicated with each other. The cross-sectional shapes of the first spacing cavity 4301 and the third spacing cavity 4201 include, but are not limited to, circular, for example, the cross-section of the third spacing cavity 4201 may also be rectangular, and the cross-section of the second spacing cavity 4302 matches the cross-section of the first connection block 1300. The alignment tube 3310 of the spring tube 3300 is disposed within the first spacing chamber 4301 and is configured to remain axially stationary relative to the rotating portion 4300, and the rotating portion 4300 is rotatable relative to the alignment tube 3310 to prevent torque from the hub assembly 3000 as the drawbar mechanism 1000 rotates. The first positioning block 2300 of the traction mechanism 1000 is disposed in the second spacing chamber 4302 and is configured to be axially movable in the second spacing chamber 4302 and also to be synchronously rotatable with the rotating portion 4300. The second positioning block 2400 of the pulling mechanism 1000 is disposed in the third limiting cavity 4201, and is configured to be axially stationary relative to the sliding portion 4200 and to be rotatable relative to the sliding portion 4200 in the circumferential direction, so as to prevent torque from being generated when the pulling mechanism 1000 rotates.

In this embodiment, the grip portion 4100, the sliding portion 4200 and the rotating portion 4300 are preferably all assembled structures, which facilitates assembly of the handle assembly 4000, the traction mechanism 1000 and the adaptor assembly 3000.

The method of use of the hemostatic clip is described below.

After delivering the hemostatic clip to a target location in the body, the operator manipulates the sliding portion 4200 of the handle assembly 4000 to slide in the sliding slot 4110 to drive the pulling mechanism 1000 to move axially along the hub assembly 3000 to drive the clip assembly to move axially along the cinch tube 2100, and manipulates the rotating portion 4300 to drive the pulling mechanism 1000 to rotate to drive the clip assembly to rotate to adjust the position of the clip assembly until the clip assembly grips tissue at the target location. In this process, the operator controls the pulling force applied to the sliding part 4200, so that the pulling force applied to the traction mechanism 1000 is smaller than the second predetermined value, and the distal end surface of the hub assembly 3000 can limit the first bending wing 1210 and prevent the latch 2222 from being connected to the locking hole 2101. In this way, the operator can repeatedly adjust the posture of the chuck component for a plurality of times.

The practitioner then pulls back on the glides 4200, causing the pull mechanism 1000 to move the jaw assembly in a direction proximal to the proximal end of the cinch tube 2100 until the first bending wing 1210 abuts the distal end face of the hub assembly 3000.

Next, the operator increases the pulling force to be greater than the second predetermined value, so that the first bending wing 1210 is deformed.

Next, the operator continues to pull back the sliding part 4200 until the latch 2222 enters the locking hole 2101.

Next, the operator increases the pulling force to be greater than the first predetermined value to overcome the interference fit between the engagement portion 2210 and the inner hole 1001, thereby releasing the engagement of the engagement portion 2210 and the pulling mechanism 1000.

Next, the operator continues to pull back the sliding part 4200 until the connection pipe 1200 abuts against the base 3210 of the elastic coupling 3200. Then, the operator continues to apply a pulling force greater than a third predetermined value, and the connection tube 1200 transmits the pulling force to the elastic connection member 3200, so that the second bending wing 3221 is deformed, and the connection between the nipple assembly 3000 and the tightening tube 2100 is released. The third predetermined value is determined as required.

Finally, the operator continues to pull back on the slide 4200 to withdraw the hub assembly 3000 and the distraction mechanism 1000 from the body.

Although the present invention is disclosed above, it is not limited thereto. Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (12)

1. A hemostatic clip, comprising:

the far end of the traction mechanism is provided with an inner hole; and the number of the first and second groups,

the clamping mechanism comprises a tightening pipe and a chuck component; the tightening pipe is provided with a first locking part; the collet assembly is partially disposed inside the tightening tube and includes an engagement portion and a collet body; the proximal end of the joint part is inserted into the inner hole and is in interference fit with the inner hole; the collet body is connected to the distal end of the engagement portion, and the distal end of the collet body extends from the distal end of the cinch tube; the chuck component is also provided with a second locking part;

the hemostatic clip is configured to allow the traction mechanism to drive the clip head assembly to reciprocate along the axial direction of the tightening tube under the action of external force when the second locking part is separated from the first locking part, so that the clip head body is switched between an open state and a closed state;

the hemostatic clip is further configured to prevent axial movement of the collet assembly along the cinch tube when the collet body is in the closed state and the second locking portion is coupled to the first locking portion, and to disengage the proximal end of the engagement portion from the inner bore when the distraction mechanism is subjected to a pulling force greater than a first predetermined value.

2. The hemostatic clip of claim 1, further comprising a hub assembly having a distal end releasably connected to the proximal end of the cinch tube and in communication with the cinch tube and configured to be rotatable relative to the cinch tube; the traction mechanism is partially arranged inside the joint sleeve assembly and can move along the axial direction of the joint sleeve assembly;

the hemostatic clip is configured such that the traction mechanism urges the clip assembly to rotate about an axis of the traction mechanism under an external force while the cinch tube spins.

3. The hemostatic clamp according to claim 2, wherein the hub assembly is provided with a first position-limiting portion, and the traction mechanism is provided with a second position-limiting portion; the second limiting part is matched with the first limiting part to prevent the second locking part from being connected with the first locking part.

4. The hemostatic clip of claim 3, wherein the hub assembly includes a sleeve, a distal end of the sleeve being inserted into the interior of the cinch tube from a proximal end of the cinch tube, a distal end face of the sleeve constituting the first stop;

the far end of the traction mechanism is provided with a first bending wing which is bent towards the outside of the traction mechanism, and the first bending wing is configured to have elasticity and form the second limiting part;

the hemostatic clip is configured to prevent the clip assembly from moving toward the proximal end of the cinch tube when the first bending wing abuts the distal end face of the sleeve, and the second locking portion is distal to the first locking portion; when the traction mechanism is subjected to a pulling force greater than a second preset value, the first bending wing deforms and allows the traction mechanism to drive the chuck component to move towards the proximal end of the tightening tube until the second locking part is connected with the first locking part; the second predetermined value is less than the first predetermined value.

5. The hemostatic clip according to any one of claims 1-4, wherein the clamping mechanism further comprises a third stop portion disposed on the cinch tube distal to the engagement portion for limiting the maximum distance the clip assembly can move toward the distal end of the cinch tube to prevent the clip assembly from backing out of the distal end of the cinch tube.

6. The hemostatic clip of claim 5, wherein the first locking portion comprises a locking aperture disposed on a sidewall of the cinch tube; the second locking part comprises a clamping block arranged on the surface of one side, close to the inner wall of the tightening pipe, of the chuck body;

the third limiting part is further used for limiting the relative position of the chuck component and the tightening pipe in the circumferential direction, so that the clamping block can be clamped into the locking hole.

7. The hemostatic clip according to claim 6, wherein the third position-limiting part extends along the radial direction of the tube and forms two channels with the wall of the tube;

the chuck body comprises two clamping arms which are oppositely arranged, and the far ends of the two clamping arms respectively penetrate through the two channels and extend out of the far end of the tightening pipe.

8. The hemostatic clip of claim 7, wherein the third stop portion comprises a pin; or the third limiting part comprises two first blocking walls arranged at the far end of the tightening pipe, and the two first blocking walls are symmetrically arranged.

9. The hemostatic clip of claim 2, wherein the hub assembly includes a sleeve and a resilient connector; the sleeve comprises a distal section and a proximal section, wherein the outer diameter of the distal section is smaller than that of the proximal section, so that a step surface is formed on the outer wall of the sleeve; a first through hole is formed in the distal section; the elastic connecting piece comprises a base part and a rod part, the base part is arranged inside the sleeve, and a second through hole for the traction mechanism to penetrate through is formed in the base part; the rod part is arranged on one side of the base part close to the far end of the sleeve and extends along the axial direction of the sleeve, and the far end of the rod part forms a second bending wing; the second bending wing penetrates through the first through hole and extends to the outside of the sleeve to form an accommodating groove with the step surface;

the proximal end of the tightening pipe is provided with a fourth limiting part protruding inwards, the proximal end of the tightening pipe is sleeved on the distal end section of the sleeve, and the fourth limiting part is arranged at the accommodating groove.

10. The hemostatic clip of claim 9, wherein the traction mechanism includes a core wire and a connecting tube disposed at a distal end of the core wire and having the inner bore; the core wire passes through the second through hole, the connecting pipe is positioned at the far end side of the base, and the outer diameter of the connecting pipe is larger than the aperture of the second through hole;

the hemostatic clip is configured such that when the proximal end of the engagement portion is disengaged from the inner bore and the proximal end of the connecting tube is positioned against the base, the pulling mechanism is subjected to a pulling force greater than a third predetermined value to deform the second bending wing and release the hub assembly from the cinch tube.

11. The hemostatic clip of claim 9, further comprising a handle assembly comprising a gripping portion, a sliding portion, and a rotating portion; the gripping part is provided with a sliding groove extending along the axial direction, and the sliding part is arranged on the sliding groove and can slide along the sliding groove; the rotating part is rotatably arranged at the far end of the holding part; the proximal end of the traction mechanism penetrates out of the proximal end of the sleeve assembly and further extends into the handle assembly to be connected with the sliding part and the rotating part of the handle assembly;

the hemostatic clamp is configured to drive the traction mechanism to move along the axial direction of the adapter sleeve assembly when the sliding part slides along the sliding groove so as to drive the clamp head assembly to move along the axial direction of the tightening tube; when the rotating part rotates relative to the holding part, the rotating part drives the traction mechanism to rotate so as to drive the chuck component and the tightening pipe to rotate.

12. The hemostatic clip of claim 11, wherein the traction mechanism comprises a core wire, a connecting tube, a first connecting block, and a second connecting block; wherein the connecting tube is arranged at the far end of the core wire and is provided with the inner hole; the first connecting block and the second connecting block are both arranged at the proximal end of the core wire, and the second connecting block is positioned at the proximal end side of the first connecting block; the first connecting block is connected with the rotating part, is configured to synchronously rotate along with the rotating part and can move relative to the rotating part in the axial direction; the second connecting block is connected with the sliding part, is configured to be kept relatively static with the sliding part in the axial direction and can rotate relatively with the sliding part in the circumferential direction; and/or the presence of a gas in the gas,

the adapter sleeve assembly further comprises a spring tube, the distal end of the spring tube is connected with the proximal end section of the sleeve, and the proximal end of the spring tube is provided with a positioning tube; the positioning tube is connected with a rotating part of the handle assembly, is configured to be relatively static with the rotating part in the axial direction, and can rotate relative to the rotating part in the circumferential direction.

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