CN217186282U - Tissue holder - Google Patents

Abstract

The utility model discloses a tissue holder, include: the clamp comprises a clamp, a clamping head and a clamping head, wherein the distal end of the clamp is provided with at least two clamping arms extending towards the distal side, and the proximal end of the clamp is provided with an operating arm extending towards the proximal side; the clamp comprises a cylindrical clamp seat, a locking structure is arranged in the clamp seat, and the near end of a clamp is received in the clamp seat; and the control part comprises a control arm extending towards the far end side, and the control arm is in releasable connection with the operating arm in the clamp seat, so that the control part can drive the clamp to move along the axial direction of the clamp seat to change the opening and closing states of the at least two clamping arms. The control arm, when connected with the operating arm, biases the operating arm radially outward; the control arm is located radially outward of the locking structure such that as the control arm is disengaged from the operating arm, the operating arm moves radially inward into engagement with the locking structure of the clip holder to lock the clip in the closed condition. According to the utility model discloses, utilize interior locking structure, clip and holder simple structure, the part characteristic is few, and the price cost is low.

Description

Tissue holder

Technical Field

Embodiments of the present invention relate to the field of medical devices and, more particularly, to a tissue holder.

Background

At present, the variety of the hemostatic clamps in clinic is various, and the functions are different. Some hemostatic clamps have many parts for retaining the human body. Some hemostatic clips are easy to fall off after being clamped and closed because of unstable clamping force. Some hemostatic clips have high resistance and are difficult to release when released. Some hemostatic clips have too long clip assemblies that retain their anatomy, and these unstable factors and structural features not only increase the time of the procedure but also increase the clinical cost of the patient, causing unnecessary time and cost waste for the patient and the medical personnel.

Therefore, there is a need for an improved hemostatic clip to address the above technical problems.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to at least alleviate or solve the above problems by providing a tissue holder.

According to an embodiment of the present invention, there is provided a tissue holder, including: a clip having at least two clip arms extending distally at a distal end thereof and an operating arm extending proximally at a proximal end thereof; a barrel-shaped holder with a locking structure disposed therein, the proximal end of the clip being received in the holder; and a control member including a control arm extending distally, the control arm being releasably connected to the operating arm within the cartridge such that the control member is capable of driving the clip to move axially along the cartridge to change the open and closed states of the at least two clip arms. The control arm, when connected with the operating arm, biases the operating arm radially outward; the control arm is located radially outward of the locking structure such that as the control arm is disengaged from the operating arm, the operating arm moves radially inward into engagement with the locking structure of the clip holder to lock the clip in a closed condition.

In one or more embodiments, the locking structure is provided with a control arm through bore extending axially therethrough for the distal end of the control arm to extend axially through the control arm through bore to form a releasable connection with the operating arm.

In one or more embodiments, the locking structure is disposed at a radially central location of the cartridge.

In one or more embodiments, the distal end of the locking structure is formed with an enlargement, a neck, and a base portion connected to the enlargement by the neck, and in the closed state, the operating arms are clamped radially inward to the neck.

In one or more embodiments, the base portion blocks proximal movement of the operating arm driven by the control arm.

In one or more embodiments, the axial position of the base portion within the cartridge is fixed.

In one or more embodiments, the base portion is formed in a disk shape, the enlargement and the neck are located in a center of the base portion, and the control arm through hole is located radially outward of the enlargement and the neck.

In one or more embodiments, the enlarged portion includes a distally tapering cone or spherical head disposed distally of the enlarged portion.

In one or more embodiments, the enlarged portion further includes a cylinder disposed at a proximal end of the cone.

In one or more embodiments, the proximal end of the operating arm is provided with a tail hook portion, the locking structure is provided with a tail hook portion through hole which axially penetrates, the tail hook portion through hole is located radially outside the control arm through hole, and in the closed state, the proximal end of the tail hook portion axially penetrates the tail hook portion through hole and radially clamps the locking structure.

In one or more embodiments, the cartridge further comprises a base stop disposed at the proximal end of the cartridge for preventing the base portion from moving toward the proximal end of the cartridge.

In one or more embodiments, the base stop is a flange, boss, tab, or step extending radially inward at the proximal end of the cartridge.

In one or more embodiments, a radially inner side of the proximal end of each operating arm is formed with an opening that opens radially inward, and a distal end of the control arm is formed with an enlarged end and a shoulder portion connected to the enlarged end by a neck portion, the neck portion being fitted in the opening such that the enlarged end and the shoulder portion are located on and abut axially both sides of the opening, respectively, the enlarged end being radially deformable out of abutment with the opening under a predetermined traction force to the proximal side.

In one or more embodiments, the enlarged end has a V-shaped diverging structure.

In one or more embodiments, the control arms include at least two arms that are proximally close together and distally radially spaced from each other.

In one or more embodiments, the control member further comprises a control wire connected to the proximal end of the control arm.

In one or more embodiments, the tissue holder further comprises a delivery tube having a distal end releasably connected to the proximal end of the cartridge, and the control wire is threaded through the delivery tube for connection to a handle for operating the same.

With the aid of the above technical scheme of the utility model, can realize following beneficial technological effect at least:

in various embodiments of the present invention, the manipulation arm of the clip is designed with an internal bias at the proximal end. By utilizing the internal locking structure, the operating arm of the clamp and the clamp seat have simple structures, few part characteristics and low price and cost. The locking structure utilizes the hole of the part to match the far end of the control arm of the control piece and act on the near end of the operating arm of the clamp, so that the opening at the near end of the operating arm is effectively supported, and the lock catch of the locking structure can freely enter and exit the opening at the near end of the operating arm.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is an exploded view of a tissue holder according to an embodiment of the present invention;

FIG. 2 is a cross-sectional block diagram of a tissue holder according to an embodiment of the invention;

fig. 3 is a schematic view of a clip according to an embodiment of the present invention in a free state;

fig. 4 is a perspective view of the distal end of a control arm according to an embodiment of the present invention;

FIG. 5 is a perspective view of a clip and control member forming a connection according to an embodiment of the present invention;

figure 6 is a perspective view of a clip and control member in connection with one another according to an embodiment of the present invention,

FIG. 7 is a perspective view of the clip and locking structure engagement according to an embodiment of the present invention;

FIG. 8 is a perspective view of the clip and locking structure engagement according to an embodiment of the present invention;

fig. 9 is a perspective view of a locking structure according to an embodiment of the present invention;

fig. 10 is a perspective view of a tissue holder according to an embodiment of the present invention;

fig. 11 is a perspective view of a tissue holder according to an embodiment of the present invention;

fig. 12 is a perspective view of a tissue holder according to an embodiment of the present invention;

fig. 13 is a perspective view of a tissue holder according to an embodiment of the present invention;

fig. 14 is a perspective view of a tissue holder according to an embodiment of the present invention;

fig. 15 is a perspective view of a tissue holder according to an embodiment of the present invention;

fig. 16 is a perspective view of a tissue holder according to an embodiment of the present invention;

fig. 17 is a perspective view of a tissue holder according to an embodiment of the present invention; and

fig. 18 is a perspective view of a tissue holder according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

In the description of the embodiments of the present invention, the terms "upper", "lower", "inner", "outer", "center", "longitudinal", "lateral", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, components or elements to a particular orientation or to be constructed and operated in a particular orientation.

In the description of the embodiments of the present invention, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but may be slightly inclined. For example, "horizontal" merely means that its orientation is more horizontal than "vertical," and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

Unless specifically stated or limited otherwise, in the description of the embodiments of the present invention, the terms "disposed," "mounted," "connected," and the like are to be construed broadly. For example, "connected" may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In an embodiment of the invention, proximal refers to the end of the medical device that is close to the operator, and distal refers to the end opposite the proximal, e.g. the end that is close to the object to be operated, such as tissue, that is located inside the body. Further, axial refers to the direction in which the longitudinal axis of the control wire of the medical device extends, radial refers to the direction perpendicular to the axial direction, and circumferential refers to the circumferential direction along the circumferential direction around the axial direction. Unless otherwise indicated, the distal end of the member refers to the end of the member near the inside of the body, and the proximal end refers to the end of the member near the outside of the body.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The various embodiments described below and the various features of the embodiments may be combined with each other without conflict.

Fig. 1 is an exploded view of a tissue holder according to an embodiment of the present invention, fig. 2 is a sectional structure view of a tissue holder according to an embodiment of the present invention, fig. 3 is a schematic view when a clip according to an embodiment of the present invention is in a free state, fig. 4 is a perspective view of a distal end of a control arm according to an embodiment of the present invention, fig. 5 and 6 are perspective views when a clip and a control element form a connection according to an embodiment of the present invention, fig. 7 and 8 are perspective views when a clip and a locking structure are engaged according to an embodiment of the present invention, and fig. 9 is a perspective view of a locking structure according to an embodiment of the present invention. The tissue holder 1 according to the first embodiment of the present invention is described in detail below with reference to fig. 1 to 9.

Reference is made to fig. 1 and 2, wherein fig. 1 schematically shows the individual parts of the tissue holder 1 in an exploded view, and fig. 2 shows the clip 10 and the control member 30 in an axial cross-sectional view when they are brought into connection with one another.

Referring to fig. 1, according to a first embodiment of the present invention, a tissue holder 1 includes a clip 10, a holder 20, and a control member 30. The distal end of the clip 10 has at least two clipping arms 11 extending distally, and the proximal end of the clip 10 has an operating arm 12 extending proximally. The holder 20 may have a cylindrical shape, for example. A locking structure 21 is provided within the holder 20 and the proximal end of the clip 10 is received within the holder 20. The control member 30 includes a control arm 31 extending distally. The control arm 31 forms a releasable connection with the operating arm 12 within the cartridge 20, so that the control member 30 can drive the clip 10 to move along the axial direction of the cartridge 20 to change the open and closed state of at least two of the clipping arms 11.

Referring to fig. 2, the control arm 31 biases the operating arm 12 radially outward when connected with the operating arm 12. The control arm 31 is located radially outwardly of the locking formation 21 such that as the control arm 31 is disengaged from the operating arm 12, the operating arm 12 moves radially inwardly into engagement with the locking formation 21 of the clip holder 20 to lock the clip 10 in the closed condition.

Referring to fig. 1 and 2, in an exemplary embodiment, the control member 30 may further include a control wire 32 connected to a proximal end of the control arm 31. The control arm 31 may include at least two arms that are close together at their proximal ends and radially spaced apart from each other at their distal ends. The tissue holder 1 can further include a delivery tube 40, a distal end of the delivery tube 40 can be releasably connected to the proximal end of the holder 20, and the control wire 32 can be threaded through the delivery tube 40.

The tissue gripper 1 may also include a handle 60 (see, e.g., fig. 18). The control wire 32 is connected at a proximal end to the handle 60. The application of a pushing force (i.e., a force toward the distal side) or a pulling force (a force toward the proximal side) to the control line 32 by the handle 60 enables the control member 30 to axially drive the clip 10 toward the distal side or toward the proximal side to control the opening and closing of the clamping arms 11 of the clip 10, i.e., to change the open and closed states of the clamping arms 11.

Referring to fig. 2 and 3, the operating arm 12 is formed with a slit 12S on the proximal end side. The slit 12S extends in the same direction as the overall extension direction of the operating arm 12, and extends from the proximal end side of the operating arm 12 (i.e., the proximal end side of the clip 10) toward the distal end side of the operating arm 12, for example, to an axially middle position of the operating arm 12.

In the state shown in fig. 2, the distal end 31F of the control arm 31 is connected to the proximal end of the operation arm 12. At this time, the distal end 31F of the control arm 31 biases the proximal end of the operating arm 12 radially outward so that the inner side faces of the slit 12S of the operating arm 12 are, for example, substantially parallel to each other. In this state, the proximal end of the operating arm 12 has a tendency to grip radially inward.

In the state shown in fig. 3, the operating arm 12 of the clip 10 is in a free state, and the proximal end of the operating arm 12 is not subjected to an external force in the radial direction. As shown in fig. 3, the inner side surfaces of the slits 12S of the operating arm 12 are not parallel to each other, for example, the radial intervals of the slits 12S gradually decrease toward the proximal end side.

It should be noted that the slit 12S of the operation arm 12 is not limited to the case described in fig. 2 and 3. In principle, it is sufficient if the distal end 31F of the control arm 31 is biased radially outwardly of the proximal end of the operating arm 12 when connected to the proximal end of the operating arm 12, compared to when the operating arm 12 is in the free state. By this arrangement, the proximal end of the operating arm 12 is radially outwardly spread by the distal end 31F of the control arm 31 when the latter is brought into connection, and thus the proximal end of the operating arm 12 has a tendency to grip radially inwardly. When the control arm 31 is disengaged from the operating arm 12, the proximal end of the operating arm 12 may be clamped radially inwardly into engagement with the locking structure 21, thereby locking the clip 10 to the locking structure 21.

A control arm 31 of a control member 30, in particular a distal end 31F of the control arm 31, according to an embodiment of the invention is described with reference to fig. 4. Fig. 4 schematically shows a partially enlarged view of a portion indicated by a dashed box R1 in fig. 1.

In an exemplary embodiment, the distal end 31F of the control arm 31 may be formed with an enlarged end 31E and a shoulder portion 31S connected to the enlarged end 31E by a neck portion 31N. The enlarged end 31E is provided at the most distal end of the control arm 31, and the enlarged end 31E, the neck portion 31N, and the shoulder portion 31S are provided in this order from the distal end side toward the proximal end side.

The control arm 31 of the control member 30 may have an axially extending tab shape as a whole. For example, when a pair of control arms 31 is provided, the control arms 31 may be arranged in parallel with each other. It should be noted that the shape of the control arm 31 according to the embodiment of the present invention is not limited thereto. For example, the control arm 31 may have a wire shape, a bar shape, or a rod shape, or may have a shape formed by twisting a plurality of strands. In principle, it is sufficient if the control arm 31 has sufficient stiffness to transmit axial pushing or pulling forces as well as rotational torques. Similarly, the control wire 32 of the control member 30 may also have a filament, strip, rod or sheet shape, or may have a shape formed by twisting multiple strands.

Referring to fig. 1 and 4, the distal end 31F of the control arm 31 has a varying width. The width of the shoulder portion 31S may be greater than the width of the control arm 31 body or control wire 32. The shoulder portion 31S first increases in width in a direction from the proximal end side toward the distal end side until it has a maximum width, and then decreases in width near the neck portion 31N. The neck portion 31N is connected between the shoulder portion 31S and the enlarged end 31E and has a reduced width relative thereto. In an exemplary embodiment, the enlarged end 31E may have a V-shaped diverging structure. The opening of the V-shaped bifurcating structure is towards the distal side.

The cooperation between the clip 10 and the control member 30, in particular, the proximal end of the operating arm 12 and the distal end 31F of the control arm 31 when the connection is made is described with reference to fig. 5 and 6. It should be noted that fig. 2, 5 and 6 all depict the releasable connection formed between the clip 10 and the control member 30, and therefore the perspective views of fig. 5 and 6 correspond to the cross-sectional view of fig. 2.

Fig. 5 schematically shows a perspective view when the proximal end of the operating arm 12 of the clip 10 and the distal end 31F of the control arm 31 of the control member 30 are connected, and fig. 6 schematically shows a partially enlarged view of a portion shown by a broken-line box R2 in fig. 5.

Referring to fig. 5 and 6, in an exemplary embodiment, the locking structure 21 may be provided with a control arm through hole 21C that extends axially therethrough, such that the distal end 31F of the control arm 31 extends axially through the control arm through hole 21C to form a releasable connection with the proximal end of the operating arm 12. The number of control arm through holes 21C may be equal to the number of control arms 31. The cross-sectional shape of the control arm through hole 21C may correspond to the cross-sectional shape of the distal end 31F of the control arm 31, allowing the distal end 31F of the control arm 31 to pass through. For example, as shown in fig. 5 and 6, the control arm through hole 21C and the distal end 31F may have a rectangular sectional shape. The shoulder portion 31S may have a gradually varying width, i.e., have a rounded profile, so as to facilitate smooth passage through the control arm through-hole 21C when the shoulder portion 31S moves toward the proximal end side.

In the present embodiment, the control arm through holes 21C are radially spaced apart by a predetermined distance, such that the distal ends 31F of the control arms 31 are radially spaced apart from each other, thereby providing the distal ends 31F of the control arms 31 with a force that radially outwardly expands the proximal ends of the operating arms 12.

Referring to fig. 5 and 6, in an exemplary embodiment, the locking structure 21 may be disposed at a radially central position of the cartridge 20. This can facilitate the provision of the control arm through hole 21C and the control arm 31. For example, when the pair of control arms 31 and the pair of control arm through holes 21C are provided, the control arms 31 and the control arm through holes 21C may be arranged radially symmetrically. It should be noted that the control arms 31 may be three or more, and accordingly the control arm through holes 21C may be three or more.

In an exemplary embodiment, a radially inner side of the proximal end of each operating arm 12 may be formed with an opening 12H that opens radially inward. The neck portion 31N of the distal end 31F may be fitted in the opening 12H so that the enlarged end 31E and the shoulder portion 31S may be located on and abut against the axial both sides of the opening 12H, respectively.

In an exemplary embodiment, the enlarged end 31E is radially deformable out of abutment with the opening 12H under a predetermined pulling force (i.e., pulling force) toward the proximal side. For example, as described in connection with fig. 4, the enlarged end 31E may have a V-shaped bifurcated structure that opens toward the distal end side, i.e., in the form of a V-shaped spring. In this embodiment, the enlarged end 31E is in the form of a V-shaped spring plate that is elastically deformable in the radial direction out of abutment with the opening 12H when subjected to a predetermined pulling force toward the proximal end side. However, the embodiment of the present invention is not limited thereto, and the enlarged end 31E may have other forms and may not necessarily be separated from the abutment with the opening 12H by elastic deformation, for example, may be radially plastically deformed to be separated from the abutment with the opening 12H when receiving a predetermined traction force to the proximal end side.

In the state shown in fig. 6, when no axial tension is applied to the control arm 31 or the applied tension is smaller than a predetermined value, the V-shaped spring of the enlarged end 31E is not deformed or is deformed less, so that the width of the enlarged end 31E is still larger than the width of the opening 12H, and therefore the enlarged end 31E can abut against the distal end surface of the operating arm 12 and prevent the operating arm 12 from moving toward the distal end side. For example, when the operating arm 12 and the control arm 31 are held relatively fixed in the axial direction and a pulling force applied to the control arm 31 is greater than a predetermined value, the V-shaped spring piece of the enlarged end 31E is pressed and deformed by the surface of the opening 12H, and the width of the enlarged end 31E is smaller than the width of the opening 12H, so that the enlarged end 31E can be axially disengaged from the abutment with the opening 12H.

In one aspect, the control arm 31 biases the operating arm 12 radially outward when connected with the operating arm 12, as described above in connection with fig. 2. Accordingly, in the state shown in fig. 5 and 6, the distal end 31F of the control arm 31 biases the operating arm 12 radially outward through the neck portion 31N. In this state, the radially outer surface of the neck portion 31N of the distal end 31F abuts the radially inner surface of the opening 12H of the operating arm 12, and the proximal end of the operating arm 12 is radially outwardly spread with a tendency to clamp radially inwardly. In other words, the neck 31N cooperates with the opening 12H, achieving a stable radial constraint between the proximal end of the operating arm 12 and the distal end 31F of the control arm 31. On the other hand, in the present embodiment, the neck portion 31N is provided between the enlarged end 31E and the shoulder portion 31S, and has a smaller size than the enlarged end 31E and the shoulder portion 31S. Thus, when the neck 31N is engaged with the opening 12H such that the proximal end of the operating arm 12 is engaged with the distal end 31F of the control arm 31, the enlarged end 31E and the shoulder portion 31S restrict axial relative movement between the operating arm 12 and the control arm 31. It can thus be seen that when the proximal end of the operating arm 12 is brought into engagement with the distal end 31F of the control arm 31, both axial and radial relative movement therebetween is reliably limited, so that a stable releasable connection therebetween can be made.

The clip 10 and the locking structure 21 engaged with each other are described with reference to fig. 7 and 8. Specifically, after the enlarged end 31E of the control arm 31 is axially out of abutment with the opening 12H of the operating arm 12, the operating arm 12 and the locking structure 21 of the clip 10 are engaged with each other. Fig. 7 schematically shows a perspective view of the engagement of the proximal end of the operating arm 12 of the clip 10 with the locking structure 21, and fig. 8 schematically shows an enlarged partial view of the portion indicated by the dashed-line box R3 in fig. 7.

In an exemplary embodiment, the distal end of the locking structure 21 may be formed with an enlarged portion 21E, a neck portion 21N, and a base portion 21B connected to the enlarged portion 21E by the neck portion 21N, and in the closed state, the operating arm 12 is clamped radially inward to the neck portion 21N. The base portion 21B can block the movement of the operation arm 12 to the proximal end side by the drive of the control arm 31. The neck portion 21N of the locking formation 21 may be disposed between the enlarged portion 21E and the base portion 21B and may have a reduced radial dimension relative to the enlarged portion 21E and the base portion 21B.

In the state shown in fig. 5 and 6, when a pulling force is applied to the control wire 32 by the handle 60, the distal end 31F of the control arm 31 brings the proximal end of the operating arm 12 to move toward the proximal side. The shoulder portion 31S at the distal end 31F will pass through the control arm through hole 21C of the lock structure 21 from the distal end side toward the proximal end side, and the proximal end side face of the operation arm 12 starts to abut against the distal end side face of the base portion 21B of the lock structure 21. The operation arm 12 is blocked by the base portion 21B and cannot move further toward the proximal end side. At this time, when the pulling force is greater than the predetermined value, the enlarged end 31E of the distal end 31F may be radially deformed to pass through the opening 12H to come out of abutment with the opening 12H, so that the proximal end of the operation arm 12 is separated from the distal end 31F of the control arm 31. As shown in fig. 7 and 8, since the proximal end of the operating arm 12 has a tendency to clamp radially inward, when the proximal end of the operating arm 12 is separated from the distal end 31F of the control arm 31, the proximal end of the operating arm 12 moves radially inward into engagement with the locking structure 21 of the cartridge 20 to lock the clip 10 in the closed state. In the closed state of the clip 10, the proximal end of the operating arm 12 can radially snap into engagement with the neck 21N of the locking formation 21, and the enlarged portion 21E and base portion 21B of the locking formation 21 limit axial movement of the proximal end of the operating arm 12.

In an exemplary embodiment, the axial position of the base portion 21B within the cartridge 20 may be fixed. For example, in some examples, the base portion 21B may be fixedly connected to an inner wall of the cartridge 20 by welding or the like, so as to be fixedly disposed within the cartridge 20, such that an axial position of the base portion 21B within the cartridge 20 is fixed.

In an exemplary embodiment, the base portion 21B may be formed in a disk shape, the enlarged portion 21E and the neck portion 21N are located at the center of the base portion 21B, and the control arm through hole 21C may be located radially outside the enlarged portion 21E and the neck portion 21N.

In an exemplary embodiment, as shown in fig. 7 and 8, when the proximal ends of the operating arms 12 grip the neck 21N of the locking structure 21, the opening 12H located radially inward of the proximal end of each operating arm 12 encloses a smaller size of passage than the radial size of the enlarged portion 21E on the proximal side. This is advantageous in that the proximal end of the operating arm 12 is prevented from moving toward the distal side with respect to the enlarged portion 21E, thereby restraining the proximal end of the operating arm 12 axially between the enlarged portion 21E and the seat portion 21B.

An exemplary structure of the locking structure 21, in particular, the locking structure 21 according to an embodiment of the present invention is described with reference to fig. 9.

In an exemplary embodiment, the enlarged portion 21E of the locking structure 21 may include a cone or a spherical head having a diameter that gradually decreases distally disposed at a distal end of the enlarged portion 21E. A cone or a spherical head at the distal end of the enlarged portion 21E may guide the alignment of the enlarged portion 21E of the lock structure 21 with the slit 12S of the operating arm 12 during the movement of the operating arm 12 toward the proximal side to abut the distal side of the base portion 21B of the lock structure 21. Furthermore, the conical or spherical head also helps to reduce the friction between the enlarged portion 21E and the opening 12H of the operating arm 12 during sliding of the enlarged portion 21E into the opening 12H, so that the proximal end of the operating arm 12 more smoothly abuts against the base portion 21B of the locking structure 21.

For example, in the embodiment shown in fig. 9, the distal end of enlarged portion 21E is provided with a cone. The cone tapers towards the distal side, i.e. the apex of the cone is located at the distal side and the base of the cone is located at the proximal side. For example, as shown in FIG. 9, enlarged portion 21E may also include a cylinder disposed at the proximal end of the cone. For another example, in the embodiment shown in fig. 8, the enlarged portion 21E may include a truncated cone having a diameter gradually decreasing toward the distal side provided at the distal end of the enlarged portion 21E, and a cylindrical body provided at the proximal end of the truncated cone. It should be noted that the shape of the enlarged portion 21E of the locking structure 21 is not limited to the case shown in fig. 8 and 9, and may also have other shapes such as a hemisphere, a compound shape of a hemisphere and a cylinder, a compound shape of a hemisphere and a truncated cone, and the like.

As shown in fig. 8 and 9, the enlarged portion 21E, the neck portion 21N and the base portion 21B of the locking formation 21 may be integrally formed. However, the embodiment of the present invention is not limited thereto, and for example, the enlarged portion 21E, the neck portion 21N, and the base portion 21B may be separate components.

Referring to fig. 2, in an exemplary embodiment, cartridge 20 can further include a base stop 20S disposed at a proximal end of cartridge 20. The base stop 20S may be used to prevent the base portion 21B from moving toward the proximal end of the cartridge 20. In an exemplary embodiment, the base stop 20S can be a flange, boss, tab, or step that extends radially inward at the proximal end of the cartridge 20. The base stop 20S may be integrally formed with the cartridge 20 or may be a separate component and fixedly attached to the cartridge 20 by welding or the like.

The components, structure and state of the tissue holder 1 according to the first embodiment of the present invention have been described above in detail. Here, the state switching or the working process of the tissue holder 1 according to the first embodiment of the present invention is briefly described.

In the state shown in fig. 2 and 5, the proximal end of the operating arm 12 of the clip 10 is brought into connection with the distal end 31F of the control arm 31 of the control member 30. The control arm through holes 21C of the locking structure 21 are arranged such that the distal ends 31F of the control arms 31 are radially spaced apart, causing the distal ends 31F of the control arms 31 to expand radially outwardly, and thus causing the proximal ends of the operating arms 12 to expand radially outwardly.

Due to the cooperation between the opening 12H of the operating arm 12 and the neck portion 31N, enlarged end 31E and shoulder portion 31S of the distal end 31F, the proximal end of the operating arm 12 and the distal end 31F of the control arm 31 can form a reliable and stable releasable connection. When a pushing force or a pulling force is applied to the control wire 32, the distal end 31F of the control arm 31 drives the proximal end of the operating arm 12 to move towards the distal end side or the proximal end side, so as to realize the repeated opening and closing of the clamping arm 11 until the clamping arm 11 accurately clamps and closes the tissue.

When the control arm 31 moves toward the proximal end side, the operation arm 12 is brought to move toward the proximal end side to abut against the distal end side surface of the base portion 21B of the lock structure 21. When a predetermined pulling force is applied to the control wire 32, the enlarged end 31E of the distal end 31F is deformed through the opening 12H out of the opening 12H, so that the proximal end of the operating arm 12 is separated from the distal end 31F of the control arm 31. At the same time, the neck 21N of the locking formation 21 is gripped radially inwardly due to the tendency of the proximal end of the operating arm 12 to grip radially inwardly. Due to the configuration of the lock structure 21, the proximal end of the operating arm 12 is reliably restrained between the enlarged portion 21E and the seat portion 21B of the lock structure 21, i.e., the state shown in fig. 7. This achieves a secure engagement of the operating arm 12 of the clip 10 with the locking structure 21 of the holder 20.

The tissue holder 1 according to the first embodiment of the present invention has been described above with reference to fig. 1 to 9. A tissue holder 1 according to a second embodiment of the present invention will be described below with reference to fig. 10 to 13, and differences from the tissue holder 1 according to the first embodiment of the present invention will be mainly described.

Fig. 10, 11, 12 and 13 are perspective views of a tissue holder according to embodiments of the invention. Fig. 10 to 13 show the overall structure of the tissue holder 1 on the left side and the partial structure of the tissue holder 1 on the right side, respectively. For example, fig. 10 to 13 show partial enlarged views of portions shown by dotted line frames R4, R5, R6, and R7 on the left side, respectively, on the right side. In addition, fig. 10 and 12 are views from the proximal end side, and fig. 11 and 13 are views from the distal end side.

Referring to fig. 10 to 13, in the tissue holder 1 according to the second embodiment of the present invention, the proximal end of the operation arm 12 may be provided with a tail hook portion 12K, the locking structure 21 may be provided with a tail hook portion through hole 21K axially penetrating, and the tail hook portion through hole 21K may be located radially outside the control arm through hole 21C. In the closed state, the proximal end of the tail hook 12K may pass axially through the tail hook through-hole 21K and radially grip the locking structure 21.

Unlike the tissue holder 1 according to the first embodiment of the present invention, in the second embodiment of the present invention, the proximal end of the operation arm 12 is provided with the tail hook portion 12K, and the tail hook portion 12K is provided, for example, radially outside the gap 12S of the operation arm 12. In addition, the lock structure 21 is also correspondingly provided with a tail hook portion through hole 21K located radially outward of the control arm through hole 21C. For example, the tail hook portion through hole 21K and the control arm through hole 21C may both be provided on the base portion 21B of the lock structure 21. Also, the locking structure 21 may not be provided with the enlarged portion 21E and the neck portion 21N (see, e.g., fig. 8 and 9).

Similar to the tissue holder 1 of the first embodiment of the present invention, in the second embodiment of the present invention, the opening 12H of the operation arm 12 is fitted to the neck portion 31N, the enlarged end 31E and the shoulder portion 31S of the distal end 31F of the control arm 31, and the proximal end of the operation arm 12 and the distal end 31F of the control arm 31 can form a reliable and stable releasable connection.

Subsequently, referring to fig. 10 and 11, when the control arm 31 is moved toward the proximal end side, the operation arm 12 is brought toward the proximal end side to abut against the distal end side of the base portion 21B of the lock structure 21, and the tail hook portion 12K of the operation arm 12 enters the tail hook portion through hole 21K of the lock structure 21.

Next, referring to fig. 12 and 13, when a predetermined pulling force is applied to the control wire 32, the enlarged end 31E of the distal end 31F is deformed through the opening 12H to be disengaged from the opening 12H, so that the proximal end of the operation arm 12 is separated from the distal end 31F of the control arm 31. Meanwhile, since the proximal end of the operating arm 12 has a tendency to clamp radially inward, the tail hook portion 12K clamps the lock structure 21 radially inward, catching the base portion 21B of the lock structure 21.

Fig. 14, 15, 16, 17 and 18 are perspective views of a tissue holder according to embodiments of the present invention, respectively. The connection and disconnection of the release member and delivery assembly in a tissue holder according to embodiments of the present invention will be described below with reference to fig. 1, 2, 14-18.

Referring to fig. 1 and 2, in an exemplary embodiment, the tissue holder 1 can further include a first coupling member 51 fixedly coupled to the proximal end of the holder 20, a second coupling member 52 fixedly coupled to the distal end of the delivery tube 40, and a constraining member 53. The first and second connection parts 51 and 52 can be interlocked or disengaged by relative radial movement, and the first and second connection parts 51 and 52 are axially fixed relative to each other when the interlock is formed. The restricting member 53 may have, for example, a ring shape and is configured to move between a restricting position and a releasing position in the axial direction. In the restricting position, the restricting part 53 may be fitted around the outer circumference of the interlocking portion of the first and second connection parts 51 and 52 to prevent the relative movement in the radial direction between the first and second connection parts 51 and 52. In the release position, the restricting member 53 may expose the interlocking portion to allow relative radial movement between the first and second coupling members 51, 52.

First coupling member 51 may be fixedly coupled to cartridge 20 of tissue holder 1, or may be integrally formed with cartridge 20 as part of cartridge 20.

One of the first and second connection parts 51 and 52 includes a pair of diametrically opposed mortises, and the other includes a pair of diametrically opposed tenons shaped to match the mortises. For example, in the embodiment shown in fig. 1, 2 and 18, the first connecting member 51 may include a tongue and groove and the second connecting member 52 includes a tongue.

The interlocking portions of the first and second connection parts 51 and 52 may form a cylinder. The restricting member 53 is provided with a radial restriction portion that is located at a radially inner side position with respect to the annular wall of the restricting member 53 and that forms a control through hole having a size smaller than the inner diameter of the annular wall in at least one radial direction. The control member 30 has a radial dimension larger than that of the control through hole, and the control wire 32 passes through the control through hole of the restricting member 53 so that the restricting member 53 can be moved toward the proximal side by the drive of the control member 30.

The restricting member 53 may also be provided with an axially through connecting through hole, for example formed between the annular wall and the radial limitation of the restricting member 53, through which at least a portion of the second connecting member 52 extends axially, so that the restricting member 53 is fitted over the second connecting member 52 and is axially movable along the at least a portion.

The second connecting member 52 has a distal connecting piece extending distally from the proximal side of the restricting member 53 through the connecting through-hole for connection with the first connecting member 51. Alternatively, the second coupling member 52 has a proximal connecting piece extending proximally from the distal side of the restriction member 53 through the coupling through-hole.

The second coupling part 52 may include a distal connector barrel 52F and a proximal connector barrel 52N, the distal connector barrel 52F being adapted to be coupled to the first coupling part 51, one of the distal connector barrel 52F and the proximal connector barrel 52N having a coupling tab extending toward the other, and the coupling tab passing through the coupling through-hole of the restricting part 53 to be fixedly coupled to the other.

The proximal connector barrel 52N forms an axially relatively movable snap-fit with the restricting member 53 at the distal end and the snap-fit defines a restricting position and a releasing position of the restricting member 53.

During assembly, the distal end 31F of the control arm 31 of the control member 30 is passed through the control arm through hole 21C of the locking structure 21, then through the opening 12H of the proximal end of the operating arm 12, and then these components are passed into the holder 20. And then passed through the interior of the mortise and tenon mechanism until the control member 30 is connected to the proximal handle 60, thereby completing the instrument installation of the tissue holder 1. When the mortise and tenon mechanism is installed, the distal connecting cylinder 52F of the second connecting part 52 passes through the restraining part 53 to be connected with the holder 20 and is fixedly connected with the proximal connecting cylinder 52N, and finally the mortise and tenon structure is circumferentially restrained by the restraining part 53.

Referring to fig. 14 to 16, when a pushing or pulling force is applied to the control wire 32 after the proximal end of the operating arm 12 is releasably connected to the distal end 31F of the control arm 31 (as shown in fig. 2 and 5), the control arm 31 brings the operating arm 12 to move toward the distal or proximal side. When the operating arms 12 are moved toward the distal side by applying a pushing force to the control wire 32, the clip arms 11 of the clip 10 are opened, as shown in fig. 14. In actual use, it may be necessary to repeatedly open and close the arms 11, as shown in fig. 15, until the arms 11 are fully closed and the tissue is accurately clamped, as shown in fig. 16.

In fig. 14 to 16, the restricting member 53 is in the restricting position, and the clip 10 is connected to the second connecting member 52 through the first connecting member 51.

When the clamping arms 11 of the clamp 10 are fully closed, (the operating arm 12 of) the clamp 10 has effectively disengaged from the control arm 31 of the control member 30 (in particular the distal end 31F of the control arm 31), as shown in fig. 7. Referring to fig. 17, in this state, the restricting member 53 is in the release position. At this time, the interlocking portions of the first and second connection parts 51 and 52 are no longer restrained by the restraining part 53, and the clip 10 and the first connection part 51 can be separated from the second connection part 52 in the radial direction.

Referring to FIG. 18, the tissue gripper 1 may further comprise a handle 60, the handle 60 being connected to the proximal end of the control wire 32 and being used to operate the control wire 32. As shown in fig. 18, by slightly radially shaking (side shifting) the handle 60, the tongue and groove of the first connecting member 51 and the tongue of the second connecting member 52 can be relatively moved in the radial direction, so that the first connecting member 10 and the second connecting member 20 are disengaged from each other. In this way, the cartridge 20 and the clip 10 (which may also be referred to as a release member) may be effectively separated from the restricting member 53, the second coupling member 52, the delivery tube 50, the control wire 32, etc. (which may also be referred to as a delivery assembly) and the delivery assembly subsequently withdrawn outside the body. In some examples, the clip 10 may be a hemostatic clip, for example.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (15)

1. A tissue holder, comprising:

a clip having at least two clip arms extending distally at a distal end thereof and an operating arm extending proximally at a proximal end thereof;

a barrel-shaped holder with a locking structure disposed therein, the proximal end of the clip being received in the holder; and

a control member including a distally extending control arm in releasable connection with the operating arm within the cartridge such that the control member is capable of driving axial movement of the clip along the cartridge to change the open and closed state of the at least two clip arms,

wherein the control arm, when connected with the operating arm, biases the operating arm radially outward; the control arm is located radially outward of the locking structure such that as the control arm is disengaged from the operating arm, the operating arm moves radially inward into engagement with the locking structure of the clip holder to lock the clip in a closed condition.

2. The tissue holder of claim 1, wherein the locking structure is provided with a control arm through bore extending axially therethrough for the distal end of the control arm to extend axially through the control arm through bore to form a releasable connection with the operating arm.

3. The tissue holder of claim 1, wherein the locking structure is disposed at a radially central location of the cartridge.

4. The tissue holder of claim 2, wherein the distal end of the locking structure is formed with an enlargement, a neck, and a base portion connected to the enlargement by the neck, the operating arms being clamped radially inward to the neck in the closed state.

5. The tissue holder of claim 4, wherein the base portion blocks proximal movement of the operating arm driven by the control arm.

6. The tissue holder of claim 5, wherein the axial position of the base portion within the holder is fixed.

7. The tissue holder of any of claims 4-6, wherein the base portion is formed in a disk shape, the enlargement and the neck are centrally located on the base portion, and the control arm through-hole is located radially outward of the enlargement and the neck.

8. The tissue holder of claim 4, wherein the enlarged portion includes a distally tapering cone or spherical head disposed distally of the enlarged portion.

9. The tissue holder of claim 8, wherein the enlarged portion further comprises a cylinder disposed at a proximal end of the cone.

10. The tissue holder of claim 2, wherein the proximal end of the operating arm is provided with a tail hook portion, the locking structure is provided with a tail hook portion through bore axially therethrough, the tail hook portion through bore is located radially outward of the control arm through bore, and in the closed state, the proximal end of the tail hook portion axially passes through the tail hook portion through bore and radially grips the locking structure.

11. The tissue holder of claim 1, wherein a radially inner side of the proximal end of each operating arm is formed with an opening that opens radially inward, and a distal end of the control arm is formed with an enlarged end and a shoulder portion connected to the enlarged end by a neck portion, the neck portion being fitted in the opening such that the enlarged end and the shoulder portion are located axially on both sides of the opening respectively and abut therewith, the enlarged end being radially deformable out of abutment with the opening under a predetermined traction force to the proximal side.

12. The tissue holder of claim 11, wherein the enlarged end has a V-shaped bifurcated configuration.

13. The tissue holder of claim 1, wherein the control arms include at least two arms having proximal ends that are close together and distal ends that are radially spaced from each other.

14. The tissue holder of claim 1, wherein the control further comprises a control wire connected at a proximal end of the control arm.

15. The tissue holder of claim 14, further comprising a delivery tube having a distal end releasably connected to the proximal end of the cartridge, and the control wire is threaded through the delivery tube for connection to a handle for operating the same.

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