Tissue clamp

Abstract

A tissue clamp is disclosed, comprising a clamp having at least two distally extending clamp arms and a proximally extending operating arm with a first locking structure formed on the operating arm; a clamp seat having a second locking structure formed thereon, the proximal end of the clamp being received within the clamp seat; and a control member including a distally extending control arm, the control arm being releasably connected to the operating arm within the clamp seat, such that the control member can drive the clamp to move axially along the clamp seat to change the open / closed state of the clamp arms. The clamp seat has a radially constricting portion that, as the control arm moves proximal, radially constricts the control arm radially inward, biasing it radially inward. When the first and second locking structures are engaged, the clamp is in a closed state. According to an embodiment of the invention, the control member cooperates with the radially constricting portion to compress the proximal end of the operating arm. The proximal end of the operating arm abuts when compressed. When the compression is released, the operating arm returns to a free state, and the first locking structure is locked.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a tissue clamp. Background Technology

[0002] Currently, there are many types of hemostatic clips available in clinical practice, with varying functions. Some clips have many parts that remain in the body. Some clips have unstable clamping force and are prone to falling off after clamping. Some clips have high resistance when released and are difficult to release. Some clips have excessively long clamp components that remain in the body. These unstable factors and structural features not only increase surgical time but also increase clinical costs for patients, resulting in unnecessary waste of time and money for both patients and medical staff.

[0003] Therefore, it is necessary to improve the hemostatic clip to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to at least alleviate or solve the above-mentioned problems by providing a tissue clamp.

[0005] According to an embodiment of the present invention, a tissue clamp is provided, comprising: a clamp having at least two clamping arms extending distally therefrom, and an operating arm extending proximally therefrom, the operating arm having a first locking structure formed thereon; a cylindrical clamp seat having a second locking structure formed thereon, the proximally end of the clamp being received within the clamp seat; and a control member including a control arm extending distally therefrom, the control arm forming a releasable connection with the operating arm within the clamp seat, such that the control member can drive the clamp to move axially along the clamp seat to change the open / closed state of the at least two clamping arms. The clamp seat has a radially constricting portion, which, as the control arm moves proximally, radially constricts the control arm radially inward, thereby biasing the operating arm radially inward, and the clamp is in a closed state when the first locking structure engages with the second locking structure.

[0006] In one or more embodiments, the radial constriction portion is further configured to block the movement of the operating arm toward the proximal side, such that as the control arm moves further toward the proximal side, the operating arm is released from the control arm, and the first locking structure engages with the second locking structure of the clamp as the operating arm moves radially outward to lock the clamp in a closed state.

[0007] In one or more embodiments, the first locking structure includes a spike formed on the radially outer side of the manipulator.

[0008] In one or more embodiments, the second locking structure includes a locking hole formed on the wall surface of the clamp.

[0009] In one or more embodiments, the radially constricting portion forms a radially inwardly extending stepped surface on the inner wall of the clamp.

[0010] In one or more embodiments, the radially constricting portion is a cylindrical section of the clamp with a reduced inner diameter, or the radially constricting portion is a boss or tab extending inward from the inner wall of the clamp.

[0011] In one or more embodiments, the first locking structure of the clamp is located on and adjacent to the distal end of the radially constricted portion.

[0012] In one or more embodiments, the control arm engages radially outward with the operating arm.

[0013] In one or more embodiments, the radially outer side of the operating arm has an axially penetrating and radially outward opening, and the distal end of the control arm has an enlarged end and a shoulder portion connected to the enlarged end via a neck, the neck portion fitting into the opening of the operating arm such that the enlarged end and the shoulder portion are located on both sides of the opening and abut against it, and the enlarged end can be radially deformed under a predetermined traction force towards the proximal side to disengage from the abutment with the opening.

[0014] In one or more embodiments, the enlarged end has a V-shaped bifurcation structure.

[0015] In one or more embodiments, the first locking structure includes a pair of spikes formed on the radially outer side of the manipulator, and the opening is formed between the spikes.

[0016] In one or more embodiments, the distal end of the control arm is formed with a radially inwardly opening recess or a radially inwardly curved portion, the recess or curved portion engaging with the radially outer side of the operating arm, and the recess or curved portion being deformable under a predetermined traction force towards the proximal end to disengage from the engagement.

[0017] In one or more embodiments, the clamp further forms an axially extending guide groove located on the distal side of the locking hole and axially spaced from the locking hole, for receiving the first locking structure of the operating arm and guiding the axial movement of the operating arm.

[0018] In one or more embodiments, the guide groove is axially aligned with the locking hole.

[0019] In one or more embodiments, the radially constricting portion is axially positioned such that when the control member drives the clamp to move axially such that the first locking structure is near the proximal end of the guide groove, further movement of the control member toward the proximal end causes the control arm to begin contacting the radially constricting portion and being radially biased inward thereon to disengage from the radial constraint of the clamp wall, and moves the first locking structure to a position radially aligned with the second locking structure, such that the clamp is in a closed state.

[0020] When the control element drives the clamp to move axially, causing the first locking structure to move from the position when the clamp is in the closed state to the distal side, the control arm gradually disengages from the radial restriction of the radial restriction portion, and the first locking structure moves axially towards the proximal end of the guide groove under the guidance of the guide groove, so that the clamp is in the open state.

[0021] In one or more embodiments, the control arm includes at least two arms that are brought together proximally.

[0022] In one or more embodiments, the control element further includes a control line connected to the proximal end of the control arm.

[0023] In one or more embodiments, the tissue clamp further includes a delivery tube, the distal end of which is releasably connected to the proximal end of the clamp, and a control line passing through the delivery tube to connect to a handle for operation thereon.

[0024] By employing the above-described technical solution of the present invention, at least the following beneficial technical effects can be achieved:

[0025] According to an embodiment of the present invention, the proximal end of the operating arm of the clamp is designed with an offset. The control member can achieve axial forward and backward pushing and pulling, and can achieve elastic compression of the proximal end of the operating arm in cooperation with the radial limiting part. The proximal end of the operating arm of the clamp is slotted and elastic. When compressed by the distal end of the control arm of the control member, the proximal end of the operating arm of the clamp moves closer together. When the compression applied by the distal end of the control arm of the control member is released, the operating arm of the clamp returns to a free state, and the spikes provided on the operating arm can be effectively locked. Attached Figure Description

[0026] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0027] Figure 1 This is an exploded view of a tissue clamp according to an embodiment of the present invention;

[0028] Figure 2 This is a perspective view of the proximal end of the operating arm of the clamp according to an embodiment of the present invention;

[0029] Figure 3 This is a perspective view of the distal end of the control arm of the control member according to an embodiment of the present invention;

[0030] Figure 4 This is a perspective view of the connection between the clip and the control component according to an embodiment of the present invention;

[0031] Figure 5 This is a perspective view of the connection between the clip and the control component according to an embodiment of the present invention;

[0032] Figure 6 This is a perspective view of the separable connection between the release component and the transmission component according to an embodiment of the present invention;

[0033] Figure 7 This is a perspective view of the separable connection between the release component and the transmission component according to an embodiment of the present invention;

[0034] Figure 8 This is a perspective view of the separable connection between the release component and the transmission component according to an embodiment of the present invention;

[0035] Figure 9 This is a perspective view of the separable connection between the release component and the transmission component according to an embodiment of the present invention;

[0036] Figure 10 This is a perspective view of the constraint component according to an embodiment of the present invention;

[0037] Figure 11 This is an exploded view of the constraint component and the second connecting component according to an embodiment of the present invention;

[0038] Figure 12 This is a perspective view of the tissue clamp when the clamp is opened according to an embodiment of the present invention;

[0039] Figure 13 This is a perspective view of a tissue clamp during repeated opening and closing of the clamp according to an embodiment of the present invention;

[0040] Figure 14 This is a perspective view of the tissue clamp when the clamp is closed according to an embodiment of the present invention;

[0041] Figure 15 This is a partially enlarged view of the tissue clamp when the clamp is closed according to an embodiment of the present invention;

[0042] Figure 16 This is a cross-sectional view of the tissue clamp during the opening and closing process according to an embodiment of the present invention;

[0043] Figure 17This is a perspective view of the tissue clamp when the restraint component is in the released position according to an embodiment of the present invention;

[0044] Figure 18 This is a partial enlarged view of the tissue clamp when the restraint member is in the released position according to an embodiment of the present invention; and

[0045] Figure 19 This is a perspective view of the tissue clamp when the release component and the transmission assembly are separated according to an embodiment of the present invention. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0047] In the description of the embodiments of the present invention, the terms "upper," "lower," "inner," "outer," "center," "longitudinal," and "lateral," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated device, component, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0048] In the description of the embodiments of the present invention, the terms "horizontal" and "vertical" do not imply that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0049] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly in the description of the embodiments of this invention. For example, "link" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] In embodiments of the invention, the proximal end refers to the end of the tissue holder closest to the operator, and the distal end refers to the end opposite the proximal end, such as the end closest to the object to be manipulated, like tissue, located within the body. Furthermore, the axial direction refers to the longitudinal direction of the control lines of the tissue holder, the radial direction refers to the direction perpendicular to the axial direction, and the circumferential direction refers to the direction along the circumference surrounding the axial direction. Unless otherwise stated, the distal end of a component refers to the end of the component closest to the body, and the proximal end refers to the end of the component closest to the outside.

[0051] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the various embodiments and features described below can be combined with each other.

[0052] Figure 1 This is an exploded view of a tissue clamp according to an embodiment of the present invention. Figure 2 This is a perspective view of the proximal end of the operating arm of the clamp according to an embodiment of the present invention. Figure 3 This is a perspective view of the distal end of the control arm of the control member according to an embodiment of the present invention. Figure 4 This is a perspective view of the connection between the clip and the control element according to an embodiment of the present invention, and Figure 5 This is a perspective view of the connection between the clip and the control element according to an embodiment of the present invention. (See below for reference.) Figures 1 to 5 The tissue clamp 1 according to an embodiment of the present invention will be described in detail.

[0053] refer to Figure 1 According to an embodiment of the present invention, a tissue clamp 1 includes a clamp 10, a cylindrical clamp seat 20, and a control member 30. The clamp 10 has at least two clamping arms 11 extending distally, and an operating arm 12 extending proximally, with a first locking structure 12L formed on the operating arm 12. A second locking structure 20L is formed on the clamp seat 20, and the proximal end of the clamp 10 is received within the clamp seat 20. The control member 30 includes a control arm 31 extending distally, which is releasably connected to the operating arm 12 within the clamp seat 20, allowing the control member 30 to drive the clamp 10 to move axially along the clamp seat 20 to change the opening and closing state of the at least two clamping arms 11.

[0054] The clamp 20 has a radially constricting portion 20R. (See below for reference.) Figure 16 As described, as the control arm 31 moves toward the proximal side, the radially constricting portion 20R radially inward presses the control arm 31, thereby radially inward biasing the operating arm 12. When the first locking structure 12L engages with the second locking structure 20L, the clamp 10 is in a closed state.

[0055] refer to Figure 1 and Figure 2 ,in Figure 2 for Figure 1A partial enlarged view of the dashed region A1. In an exemplary embodiment, the first locking structure 12L may include a spike 12F formed on the radially outer side of the operating arm 12. In an exemplary embodiment, the second locking structure 20L may include a locking hole formed on the wall of the clamp 20. The locking hole may be configured to receive the spike 12F, thereby locking the spike 12F in the axial and circumferential directions, and thus locking the operating arm 12 of the clamp 10 in the axial and circumferential directions. A slot 12S is also formed on the proximal side of the operating arm 12, thereby providing radial elasticity.

[0056] In an exemplary embodiment, the radially outer side of the operating arm 12 may be formed with an axially penetrating and radially outward opening 12H.

[0057] refer to Figure 1 and Figure 3 ,in Figure 3 for Figure 1 A partial enlarged view of the dashed region A2. In an exemplary embodiment, the distal end of the control arm 31 may have an enlarged end 31E and a shoulder portion 31S connected to the enlarged end 31E via a neck 31N. The enlarged end 31E is located at the farthest end of the control arm 31, and the enlarged end 31E, the neck 31N, and the shoulder portion 31S are arranged sequentially from the distal end side toward the proximal end side.

[0058] refer to Figure 4 and Figure 5 ,in Figure 5 for Figure 4 A magnified view of a portion of the area A3, indicated by the dashed line. Figure 4 and Figure 5 In the indicated state, the proximal end of the operating arm 12 of the clamp 10 and the distal end of the control arm 31 of the control member 30 form a releasable connection. In an exemplary embodiment, the neck 31N can fit into the opening 12H of the operating arm 12, such that the enlarged end 31E and the shoulder portion 31S are located on both sides of the opening 12H and abut against it, and the enlarged end 31E can be radially deformed under a predetermined traction force towards the proximal end to disengage from the abutment with the opening 12H.

[0059] In an exemplary embodiment, the control arm 31 of the control member 30 may generally have an axially extending sheet shape. For example, when a pair of control arms 31 are provided, the control arms 31 may be arranged parallel to each other. It should be noted that the shape of the control arm 31 in the embodiments of the present invention is not limited to this. For example, the control arm 31 may be filamentous, strip-shaped, or rod-shaped, or may have a shape formed by twisting multiple strands of wire. In principle, as long as the control arm 31 has sufficient rigidity to transmit axial thrust or tension and rotational torque, it is acceptable. Similarly, the control line 32 of the control member 30 may also be filamentous, strip-shaped, rod-shaped, or sheet-shaped, or may have a shape formed by twisting multiple strands of wire.

[0060] In an exemplary embodiment, the control arm 31 body is sheet-shaped, with the enlarged end 31E, neck 31N, and shoulder 31S having the same thickness but varying widths. Here, thickness refers to the radial dimension, and width refers to the dimension in a direction perpendicular to both the thickness direction and the axial direction. Figure 3 As shown, the width of the shoulder portion 31S can be equal to the width of the control arm 31 body or the control line 32. In other examples, the width of the shoulder portion 31S can be greater than the width of the control arm 31 body or the control line 32. The neck 31N connects between the shoulder portion 31S and the enlarged end 31E and has a narrower width relative to both. Thus, when the neck 31N can mate with the opening 12H, the enlarged end 31E and the shoulder portion 31S are located on both sides of the opening 12H and abut against both sides of the opening 12H, and the enlarged end 31E can be radially deformed under a predetermined tension towards the proximal side to disengage from the abutment with the opening 12H.

[0061] like Figure 3 and Figure 5 As shown, in an exemplary embodiment, the enlarged end 31E may have a V-shaped forked structure, that is, in the form of a V-shaped spring. In an exemplary embodiment, the enlarged end 31E can radially elastically deform under a predetermined traction force (i.e., tension) toward the proximal side to disengage from the contact with the opening 12H. For example, the enlarged end 31E may have a V-shaped forked structure opening toward the distal side. When no axial tension is applied to the control arm 31 or the applied tension is less than a predetermined value, the V-shaped spring of the enlarged end 31E does not deform or deforms only slightly, so that the width of the enlarged end 31E is still greater than the width of the opening 12H. Therefore, the enlarged end 31E can abut against the distal surface of the spur 12F of the operating arm 12 and prevent the operating arm 12 from moving toward the distal side. For example, when the tension applied to the control arm 31 is greater than a predetermined value, the V-shaped spring sheet of the enlarged end 31E is 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 detach from the contact with the opening 12H in the axial direction.

[0062] like Figure 2 , Figure 3 and Figure 5 As shown, in an exemplary embodiment, the first locking structure 12L may include a pair of spikes 12F formed on the radially outer side of the operating arm 12, and an opening 12H is formed between the spikes 12F.

[0063] In this embodiment of the invention, the proximal end of the operating arm 12 and the distal end of the control arm 31 form a releasable connection within the clamp 20. As described above, the first locking structure 12L of the operating arm 12 includes a spike 12F disposed radially outward of the operating arm 12 and an opening 12H formed between the spikes 12F. The distal end of the control arm 31 is provided with an enlarged end 31E, a neck 31N, and a shoulder 31S that cooperate with the spikes 12F and the opening 12H, so that the proximal end of the operating arm 12 can form a releasable connection with the distal end of the control arm 31. When a releasable connection is formed between the two, the control member 30 can drive the clamp 10 to move back and forth along the axial direction of the clamp 20, thereby changing the opening and closing state of the clamp arm 11.

[0064] It should be noted that, in embodiments of the present invention, the releasable connection formed between the proximal end of the operating arm 12 and the distal end of the control arm 31 within the clamp 20 is not limited to the manner described above. For example, in an exemplary embodiment, the distal end of the control arm 31 may have a radially inwardly opening recess or a radially inwardly curved portion, which engages with the radially outward side of the operating arm 12, and the recess or curved portion can deform under a predetermined traction force towards the proximal end to disengage from the engagement.

[0065] Continue to refer to Figure 1 In an exemplary embodiment, the clamp 20 may also have an axially extending guide groove 20G, which is located on the distal side of the locking hole and axially spaced from the locking hole, for receiving the first locking structure 12L of the operating arm 12 and guiding the axial movement of the operating arm 12.

[0066] In this embodiment of the invention, the guide groove 20G can guide the axial movement of the first locking structure 12L of the operating arm 12, thereby guiding the axial movement of the operating arm 12. The guide groove 20G also defines the axial movement range of the first locking structure 12L within the clamp 20, particularly the farthest position of the first locking structure 12L within the clamp 20. Specifically, when the first locking structure 12L of the operating arm 12 abuts against or approaches the far end face of the guide groove 20G, the proximal end of the operating arm 12 is not radially squeezed inward by the radially constricting portion 20R of the clamp 20, or is squeezed only slightly, so that the first locking structure 12L of the operating arm 12 cannot radially disengage from the constraint of the guide groove 20G.

[0067] Continue to refer to Figure 1In an exemplary embodiment, the guide groove 20G can be axially aligned with the locking hole. When the control arm 31 drives the first locking structure 12L to move from the distal end to the proximal end within the guide groove 20G, the control arm 31 is radially inwardly compressed by the radially constricting portion 20R, causing the operating arm 12 to be radially inwardly biased, and the first locking structure 12L can be released from the constraint of the guide groove 20G. When the guide groove 20G is axially aligned with the locking hole, engagement between the first locking structure 12L and the second locking structure 20L, such as the locking hole, can be achieved without adjusting the circumferential relative position between the first locking structure 12L and the second locking structure 20L, without needing to adjust the circumferential relative position between them.

[0068] refer to Figure 1 and Figure 4 In an exemplary embodiment, the control arm 31 may include at least two arms brought together proximally. Additionally, in an exemplary embodiment, the control element 30 may also include a control line 32 connected to the proximal end of the control arm 31.

[0069] In an exemplary embodiment, the tissue clamp 1 may further include a delivery tube 40. The distal end of the delivery tube 40 may be releasably connected to the proximal end of the clamp 20. For example, the delivery tube 40 may be releasably connected to the clamp 20 via a first connecting member 51, a second connecting member 52, and a restraining member 53, as described below. A control line 32 may be threaded through the delivery tube 40 to connect to a handle 60 for operation thereon (see [link to relevant documentation]). Figure 19 ).

[0070] The following text combines Figure 1 , Figures 6 to 11 Describes a releasable connection between a release component and a transmission component according to an embodiment of the present invention.

[0071] refer to Figure 1 According to an embodiment of the present invention, the tissue clamp 1 includes a first connecting member 51 and a second connecting member 52, wherein the first connecting member 51 is disposed on the distal side of the second connecting member 52. In some examples, the first connecting member 51 may be fixedly connected to the clamp 20, for example, by welding to the proximal side of the clamp 20. In some examples, the first connecting member 51 may be integrally formed with the clamp 20.

[0072] The first connecting member 51 and the second connecting member 52 are configured to interlock or disinterlock by radial relative movement, and when interlocking is formed, the first connecting member 51 and the second connecting member 52 are axially fixed relative to each other, such as... Figure 6As shown. The tissue clamp 1 also includes a restraining member 53, which is configured to move axially between a restrained position and a released position. In the restrained position, the restraining member 53 is fitted around the outer periphery of the interlocking portion of the first connecting member 51 and the second connecting member 52 to prevent radial relative movement between the first connecting member 51 and the second connecting member 52. At this time, the clamp 20 can be connected to the second connecting member 52 through the first connecting member 51, as shown. Figure 7 As shown. In the released position, the restraining member 53 exposes the interlocking portion to allow radial relative movement between the first connecting member 51 and the second connecting member 52. At this time, the clamp 20 can be separated from the second connecting member 52, as shown. Figure 8 As shown.

[0073] refer to Figure 6 In an exemplary embodiment, the first connecting member 51 and the second connecting member 52 may, for example, interlock with each other via a mortise and tenon structure. One of the first connecting member 51 and the second connecting member 52 may include a pair of mortises arranged radially opposite each other, and the other may include a pair of tenons arranged radially opposite each other, with shapes matching the mortises. For example, in... Figure 1 and Figure 6 In the illustrated embodiment, the first connecting member 51 includes a mortise and the second connecting member 52 includes a tenon.

[0074] refer to Figure 6 In an exemplary embodiment, the interlocking portion of the first connecting member 51 and the second connecting member 52 may be formed into a cylinder.

[0075] Combination Figure 6 and Figure 7 The constraint member 53 in the constrained position is described. When the first connecting member 51 and the second connecting member 52 interlock with each other via a mortise and tenon, the constraint member 53 can be fitted around the outer periphery of the interlocking portion of the first connecting member 51 and the second connecting member 52, for example, around the outer periphery of the cylinder formed by the proximal end of the first connecting member 51 with the mortise and the tenon of the second connecting member 52. By setting the inner diameter of the constraint member 53, the constraint member 53 in the constrained position can prevent radial relative movement between the first connecting member 51 and the second connecting member 52. Figure 7 In the embodiment shown, the constraint member 53 may be cylindrical and may completely cover the outer periphery of the interlocking portion of the first connecting member 51 and the second connecting member 52.

[0076] Combination Figure 7 and Figure 8 Describes the constraint component 53 in the released position. When the constraint component 53 is driven as... Figure 8When the middle arrow indicates that the component 53 moves axially toward the proximal end, the constraint member 53 partially exposes the first connecting member 51 and the second connecting member 52, particularly their interlocking portion. In this case, the radial relative movement between the first connecting member 51 and the second connecting member 52 is no longer restricted.

[0077] refer to Figure 9 When one or both of the first connecting member 51 and the second connecting member 52 are subjected to radial force, they can be connected as follows: Figure 9 The components move radially relative to each other as indicated by the middle arrow, moving further apart radially until they separate, i.e., disengaging from the interlock. In this case, the first connecting component 51 and the second connecting component 52 disengage from the interlock.

[0078] Combination Figures 6 to 9 As described, when the constraint member 53 is in the constrained position, the clamp 20 can be connected to the second connection member 52 via the first connection member 51, and then to the delivery pipe 40. When the constraint member 53 is in the released position, the clamp 20 and the first connection member 51 can be separated from each other and from the second connection member 52, and then from the delivery pipe 40.

[0079] The following text combines Figure 10 and Figure 11 The constraint component and the second connecting component according to embodiments of the present invention are described.

[0080] refer to Figure 10 In an exemplary embodiment, the constraint member 53 may be provided with a radial limiting portion. The radial limiting portion may be located radially inner relative to the annular wall of the constraint member 53, and may form a control through-hole 53H with a size smaller than the inner diameter of the annular wall in at least one radial direction. The control line 32 may, for example, pass through the control through-hole 53H of the constraint member 53, and may drive the constraint member 53 toward the proximal side when axial tension is received.

[0081] In an exemplary embodiment, the constraint member 53 may further be provided with an axially through connecting hole 53T. At least a portion of the second connecting member 52 may extend axially through the connecting hole 53T, such that the constraint member 53 can be fitted onto the second connecting member 52 and can move axially along at least that portion. Figure 10 and Figure 11 At least a portion of the second connecting member 52 passes through the connecting through-hole 53T of the restraining member 53, and the proximal end of the at least portion can be fixedly connected to the distal end of the delivery tube 40. The restraining member 53 is axially movable along the at least portion, thereby switching between a restrained position and a released position under the drive of the control line 32, for example, moving from the restrained position to the released position.

[0082] In an exemplary embodiment, the radial limiting portion may include an annulus 53R and connecting spokes 53S. The inner cavity of the annulus 53R may define a control through-hole 53H, and the connecting spokes 53S may be connected between the annulus 53R and the annulus wall of the restraining member 53.

[0083] refer to Figure 1 and Figure 11 In an exemplary embodiment, the second connecting member 52 may include a distal connecting sleeve 52F and a proximal connecting sleeve 52N. The distal connecting sleeve 52F may be used to connect to the first connecting member 51, and one of the distal connecting sleeve 52F and the proximal connecting sleeve 52N may have a connecting tab extending toward the other. For example, the distal connecting sleeve 52F has a connecting tab 522 extending toward the proximal connecting sleeve 52N. The connecting tab 522 may pass through the connecting through-hole 53T of the restraining member 53 and be fixedly connected to the proximal connecting sleeve 52N, for example, by welding.

[0084] refer to Figure 11 In an exemplary embodiment, the proximal connecting cylinder 52N can form an axially movable snap-fit ​​with the restraining member 53 at its distal end, and this snap-fit ​​can define the restraining position and the release position of the restraining member 53. For example, the proximal connecting cylinder 52N includes an axially extending snap-fit ​​groove 524 provided at the distal end, and the restraining member 53 is provided with an axially extending snap-fit ​​piece 534 at its proximal end. The snap-fit ​​piece 534 may have circumferentially protruding protrusions on one or both sides of its proximal end, and may also have axially extending slots from the distal end to the proximal end of the snap-fit ​​piece 534. One or both sides of the inner wall of the snap-fit ​​groove 524 may have recesses corresponding to the protrusions of the snap-fit ​​piece 534, for accommodating the protrusions when the snap-fit ​​piece 534 is snapped into the snap-fit ​​groove 524. The inner wall of the snap-fit ​​groove 524 may be formed with two sets of recesses spaced apart along the axial direction, and the axial distance between the two sets may be set such that when the protrusion of the snap-fit ​​piece 534 snaps into one set of recesses on the distal side of the snap-fit ​​groove 524, the restraining member 53 is in a restrained position, and when the protrusion of the snap-fit ​​piece 534 snaps into another set of recesses on the proximal side of the snap-fit ​​groove 524, the restraining member 53 is in a released position.

[0085] The assembly process of the tissue clamp according to an embodiment of the present invention is briefly described here. The proximal connecting sleeve 52N of the second connecting member 52 is fixedly connected to the delivery tube 40. The restraining member 53 is movably connected to the proximal connecting sleeve 52N. The distal connecting sleeve 52F of the second connecting member 52 passes through the restraining member 53 and is fixedly connected to the proximal connecting sleeve 52N. After the distal connecting sleeve 52F is connected to the first connecting member 51 fixed to the proximal side of the clamp 20, the mortise and tenon structure of the first connecting member 51 and the second connecting member 52 is circumferentially restrained by the restraining member 53. The distal end of the control arm 31 of the control member 30 is connected to the proximal end of the operating arm 12 of the clamp 10 and then passes through the clamp 20, subsequently connecting to the handle 60 after passing through the distal connecting sleeve 52F and the delivery tube 40.

[0086] Figure 12 , Figure 13 , Figure 14 , Figure 17 and Figure 19 Three-dimensional views of the tissue clamp when the clamp is opened according to embodiments of the present invention. Figure 15 and Figure 18 They are Figure 14 and Figure 17 Enlarged views of the dashed areas in A4 and A5, and Figure 16 This is a cross-sectional view of the tissue clamp during the opening and closing process according to an embodiment of the present invention. The following will be combined with... Figures 12 to 19 The connection and separation between the clamp and the control element, as well as between the release element and the delivery assembly, in a tissue clamp according to an embodiment of the present invention are described.

[0087] refer to Figures 12 to 14 When the proximal end of the operating arm 12 forms a releasable connection with the distal end of the control arm 31 (e.g. Figure 4 and Figure 5 (As shown) After applying a pushing or pulling force to the control line 32, the control arm 31 can move the operating arm 12 toward the distal or proximal side. When a pushing force is applied to the control line 32 to move the operating arm 12 toward the distal side, the clamping arm 11 of the clamp 10 opens, as shown. Figure 12 As shown. In actual use, it may be necessary to repeatedly open and close the clamping arm 11, such as... Figure 13 As shown, until the clamping arm 11 is completely closed and accurately clamps the tissue, as Figure 14 As shown.

[0088] exist Figures 12 to 14 In this configuration, the constraint member 53 is fitted around the interlocking portion of the first connecting member 51 and the second connecting member 52 to prevent radial relative movement between the first connecting member 51 and the second connecting member 52. At this time, the constraint member 53 is in the constrained position, and the clamp 10 is connected to the second connecting member 52 through the first connecting member 51, and then connected to the distal end of the delivery pipe 40.

[0089] refer to Figure 14 and Figure 15 ,in particular Figure 15 In the enlarged view, the neck 31N of the control arm 31 still mates with the opening 12H of the operating arm 12, and the enlarged end 31E and the shoulder 31S abut against the distal and proximal sides of the opening 12H, respectively. That is to say, the proximal end of the operating arm 12 and the distal end of the control arm 31 still maintain an effective connection.

[0090] refer to Figure 16 Describe the state changes of the operating arm 12 and the control arm 31 during the opening and closing of the clamp.

[0091] The control element 30 drives the operating arm 12 of the clamp 10 to move axially, causing the first locking structure 12L of the operating arm 12 to move axially along the guide groove 20G. When the distal end of the control arm 31 is not close to the radially constricting portion 20R located on the proximal side inside the clamp 20, the distal end of the control arm 31 is not radially compressed by the radially constricting portion 20R. Correspondingly, the proximal end of the operating arm 12 is in a free state and is not radially compressed inward. The first locking structure 12L of the operating arm 12, for example, the spacing between the radially outer surfaces of the spurs 12F is greater than the inner diameter of the clamp 20, thus constraining it within the guide groove 20G of the clamp 20. Figure 16 As shown in (a). At this time, the radially inner surfaces of the slot 12S can be approximately parallel to each other. The distal end of the control arm 31 can be U-shaped, compressing the two sides of the U-shape, and using the elastic properties of the parts themselves to squeeze the proximal end of the operating arm 12 of the clamp 10.

[0092] As the control arm 31 moves further proximally and its distal end approaches the radial constriction portion 20R, the distal end of the control arm 31 begins to be radially compressed inward by the radial constriction portion 20R. Correspondingly, the proximal end of the operating arm 12 begins to be radially compressed inward, and the distance between the radially facing sides of the proximal end of the operating arm 12 (i.e., the distance between the radially inner sides of the slot 12S) begins to decrease. The distance between the radially outer sides of the spurs 12F begins to decrease, but remains greater than the inner diameter of the clamp 20; therefore, the spurs remain constrained within the guide groove 20G of the clamp 20. Figure 16 As shown in (b).

[0093] As the distal end of the control arm 31 approaches the radial constriction portion 20R further, the distal end of the control arm 31 is further radially compressed inward by the radial constriction portion 20R. Correspondingly, the proximal end of the operating arm 12 is further radially compressed inward, and the distance between the radial faces of the proximal ends of the operating arm 12 is further reduced, even to the point of contact. The distance between the radial outer faces of the spur 12F is reduced to less than the inner diameter of the clamp 20, thereby escaping the constraint of the guide groove 20G of the clamp 20, as... Figure 16As shown in (c). In this state, the spur 12F of the operating arm 12 is retracted into the clamp 20, and when the operating arm 12 is driven by the control member 30, it can move freely within the internal channel of the clamp 20, for example, axially or circumferentially.

[0094] As the distal end of the control arm 31 approaches the radially constricting portion 20R further, the distal end of the control arm 31 is further radially compressed inward by the radially constricting portion 20R. Correspondingly, the proximal end of the operating arm 12 is further radially compressed inward, or remains in contact with each other. The spur 12F moves axially toward the proximal side to a position aligned with the second locking structure 20L, such as a locking hole, as... Figure 16 As shown in (d).

[0095] exist Figure 16 In the state shown in (d), the clamping arm 11 of the clamp 10 is fully closed, and the proximal end of the operating arm 12 and the distal end of the control arm 31 remain effectively connected, as shown in (d). Figure 14 and Figure 15 As shown.

[0096] refer to Figure 16 (d) In an exemplary embodiment, the radial constriction portion 20R may also be configured to block the movement of the operating arm 12 toward the proximal side, such that as the control arm 31 moves further toward the proximal side, the operating arm 12 is released from the control arm 31, and the first locking structure 12L engages with the second locking structure 20L of the clamp 20 as the operating arm 12 moves radially outward, thereby locking the clamp 10 in a closed state. For example, the inner diameter of the distal side of the radial constriction portion 20R is set to be smaller than the inner diameter of the clamp 20, thereby preventing the spike 12F of the operating arm 12 from moving further toward the proximal side.

[0097] Combination Figure 16 (d) Figure 17 and Figure 18 When the control arm 31 is pulled further towards the proximal end, the distal end of the control arm 31 separates from the proximal end of the operating arm 12. At this time, the proximal end of the operating arm 12 returns to its normal open state due to the absence of compression from the control member 30, and the spur 12F of the operating arm 12 springs radially outward into the second locking structure 20L of the clamp 20, such as a locking hole, effectively locking the operating arm 12. Continuing to pull the control member 30 towards the proximal end causes the constraint member 53 to move from the constrained position to the released position towards the proximal end, at which point the mortise and tenon structure disengages from the constraint member 53.

[0098] In an exemplary embodiment, the radially constricting portion 20R may form a radially inwardly extending stepped surface on the inner wall of the clamp 20.

[0099] In an exemplary embodiment, the radially constricting portion 20R may be a cylindrical section of the clamp 20 with a reduced inner diameter, or the radially constricting portion 20R may be a boss or tab extending inward from the inner wall of the clamp 20.

[0100] In an exemplary embodiment, the first locking structure 12L of the clamp 20 may be located on the distal side of the radially constricting portion 20R and adjacent to it.

[0101] In an exemplary embodiment, the control arm 31 may engage with the radially outer side of the operating arm 12.

[0102] In an exemplary embodiment, the radially constricting portion 20R can be axially positioned such that when the control member 30 drives the clamp 10 to move axially so that the first locking structure 12L is near the proximal end of the guide groove 20G, further movement of the control member 30 towards the proximal end can cause the control arm 31 to begin contacting the radially constricting portion 20R and be radially biased inward by it to disengage from the radial constraint of the wall of the clamp 20, and move the first locking structure 12L to a position radially aligned with the second locking structure 20L, so that the clamp 10 is in a closed state. When the control member 30 drives the clamp 10 to move axially so that the first locking structure 12L moves from the position when the clamp 10 is in the closed state to the distal end, the control arm 31 gradually disengages from the radial constriction of the radially constricting portion 20R, and the first locking structure 12L moves axially towards the proximal end of the guide groove 20G under the guidance of the guide groove 20G, so that the clamp 10 is in an open state.

[0103] refer to Figure 19 The tissue holder 1 according to an embodiment of the present invention may further include a handle 60, which is connected to the proximal end of the control line 32 and used to operate the control line 32. Figure 19 As shown, a slight radial shaking (lateral movement) of the handle 60 allows the tenon of the first connecting member 51 and the tenon of the second connecting member 52 to move radially relative to each other, thereby disengaging the first connecting member 10 and the second connecting member 20 from their interlock. In this way, the clamp 20 and the clamp 10 housed therein (also referred to as a release member) can be effectively separated from the restraint member 53, the second connecting member 52, the delivery tube 50, the control line 32, the handle 60, etc. (also referred to as the delivery assembly), and the delivery assembly can then be retracted outside the body. In some examples, the clamp 10 may be, for example, a hemostatic clamp.

[0104] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

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, the operating arm having a first locking structure formed thereon; a cylindrical clip seat having a second locking structure formed thereon, the proximal end of the clip being received in the clip seat; and a control member having a control arm extending distally, the control arm being releasably connected with the operating arm in the clip seat such that the control member can drive the clip to move axially along the clip seat to change an open-close state of the at least two clip arms, wherein the clip seat has a radial constriction formed thereon, the radial constriction pressing the control arm radially inwardly as the control arm moves proximally to bias the operating arm radially inwardly, the clip being in a closed state when the first locking structure engages with the second locking structure, and the radial constriction being further configured to block the movement of the operating arm proximally such that the operating arm is released from the control arm as the control arm moves further proximally, the first locking structure engaging with the second locking structure of the clip seat as the operating arm moves radially outwardly to lock the clip in the closed state. the first locking structure comprises a fly blade formed on a radially outer side of the operating arm.

2. The tissue holder of claim 1, wherein, the second locking structure comprises a locking hole formed on a wall surface of the clip seat.

3. The tissue holder of claim 1, wherein, the radial constriction forms a step surface extending radially inwardly on an inner wall of the clip seat.

4. The tissue holder of claim 1, wherein, the radial constriction is a reduced inner diameter cylindrical section of the clip seat, or the radial constriction is a boss or tab extending inwardly from the inner wall of the clip seat.

5. The tissue holder of claim 4, wherein, the second locking structure of the clip seat is located proximally adjacent to the radial constriction.

6. The tissue holder of claim 1, wherein, the control arm engages with a radially outer side of the operating arm.

7. The tissue holder of claim 1, wherein, a radially outer side of the operating arm forms an opening axially extending through and radially open outwardly, and a distal end of the control arm forms an enlarged end and a shoulder portion connected with 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 two sides of the opening and abut against the opening respectively, the enlarged end being radially deformable to disengage from the abutment with the opening under a predetermined proximal traction.

8. The tissue holder of claim 7, wherein, the enlarged end has a V-shaped bifurcated structure.

9. The tissue holder of claim 8, wherein, the first locking structure comprises a pair of fly blades formed on a radially outer side of the operating arm, and the opening is formed between the fly blades.

10. The tissue holder of claim 8, wherein, a distal end of the control arm forms a radially inwardly open recess or a radially inwardly curved bend portion, the recess or the bend portion being engaged with a radially outer side of the operating arm, and the recess or the bend portion being deformable to disengage from the engagement under a predetermined proximal traction.

11. The tissue holder of claim 7, wherein, the clip seat further has an axially extending guide slot located proximally adjacent to and axially spaced from the locking hole for receiving the first locking structure of the operating arm and guiding the axial movement of the operating arm.

12. The tissue holder of claim 3, wherein, the guide slot is axially aligned with the locking hole.

13. The tissue holder of claim 12, wherein, ​ 14. The tissue holder of claim 12, wherein, the radial constriction axially positioned such that when the control drives the clip to axial movement such that the first locking structure is located near the proximal end of the guide slot, further movement of the control proximally causes the control arm to begin contacting the radial constriction and be biased radially inward to disengage the radial constraint of the wall of the clip seat and move the first locking structure to a position radially aligned with the second locking structure such that the clip is in a closed state, and when the control drives the clip to axial movement such that the first locking structure moves distally from the position when the clip is in a closed state, the control arm gradually disengages the radial constriction of the radial constriction, the first locking structure axially moves toward the proximal end of the guide slot under the guidance of the guide slot such that the clip is in an open state.

15. The tissue holder of claim 14, wherein, the control arm comprises at least two arms that converge proximally.

16. The tissue holder of any one of claims 1-15, wherein, the control further comprises a control wire connected to the proximal end of the control arm.

17. The tissue holder of claim 16, further comprising a delivery tube, a distal end of the delivery tube releasably connected to a proximal end of the clip seat, and the control wire threaded through the delivery tube to connect to a handle for operation thereof.

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