Tissue clamp

Abstract

The application discloses a tissue holder, comprising: a clip, the distal end of the clip having at least two clip arms extending to the distal side, the proximal end of the clip having an operating arm extending to the proximal side; a cylindrical clip seat, the clip seat being provided with a locking structure, the proximal end of the clip being received in the clip seat; and a control piece, the control piece comprising a control arm extending to the distal side, the control arm being releasably connected with the operating arm in the clip seat, so that the control piece can drive the clip to move along the axial direction of the clip seat to change the opening and closing state of the at least two clip arms. The control arm biases the operating arm radially outward when the control arm is connected with the operating arm; the control arm is located radially outside the locking structure, so that, with the control arm being separated from the operating arm, the operating arm moves radially inward to be engaged with the locking structure of the clip seat to lock the clip in the closed state. According to the embodiment of the application, the clip and the clip seat structure are simple, the part features are few, and the price cost is low by using the internal locking structure.

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; a cylindrical clamp seat having a locking structure therein, the proximal 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. When connected to the operating arm, the control arm radially outwardly biases the operating arm; the control arm is radially located outside the locking structure, such that as the control arm separates from the operating arm, the operating arm moves radially inward and engages with the locking structure of the clamp seat to lock the clamp in a closed state.

[0006] In one or more embodiments, the locking structure is provided with an axially through-hole for the distal end of the control arm to extend axially through the control arm through-hole to form a releasable connection with the operating arm.

[0007] In one or more embodiments, the locking structure is disposed at the radial center of the clamp.

[0008] In one or more embodiments, the distal end of the locking structure is formed with an enlarged portion, a neck-shaped portion, and a base portion connected to the enlarged portion via the neck-shaped portion, wherein in the closed state, the operating arm is radially inwardly clamped in the neck-shaped portion.

[0009] In one or more embodiments, the base portion prevents the operating arm from moving proximally under the drive of the control arm.

[0010] In one or more embodiments, the axial position of the base portion within the clamp is fixed.

[0011] In one or more embodiments, the base portion is formed in a disc shape, the enlarged portion and the neck portion are located at the center of the base portion, and the control arm through hole is located radially outside the enlarged portion and the neck portion.

[0012] In one or more embodiments, the enlarged portion includes a conical or spherical head disposed at the distal end of the enlarged portion, the diameter of which gradually decreases toward the distal end.

[0013] In one or more embodiments, the enlarged portion further includes a cylinder disposed at the proximal end of the cone.

[0014] In one or more embodiments, the proximal end of the operating arm is provided with a tail hook portion, and the locking structure is provided with an axially penetrating tail hook portion through hole. The tail hook portion through hole is located radially outside the through hole of the control arm, and in the closed state, the proximal end of the tail hook portion axially passes through the tail hook portion through hole and radially clamps the locking structure.

[0015] In one or more embodiments, the clamp further includes a base stop disposed at the proximal end of the clamp for preventing the base portion from moving toward the proximal end of the clamp.

[0016] In one or more embodiments, the base stop is a flange, boss, tab, or step extending radially inward from the proximal end of the clamp.

[0017] In one or more embodiments, each manipulator has a radially inwardly opening formed on the radially inner side of its proximal end, 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 such that the enlarged end and the shoulder portion are located on opposite axial sides of the opening and abut against it, the enlarged end being radially deformable under a predetermined traction force toward the proximal end to disengage from the abutment with the opening.

[0018] In one or more embodiments, the enlarged end has a V-shaped bifurcation structure.

[0019] In one or more embodiments, the control arm includes at least two arms whose proximal ends are close together and whose distal ends are radially spaced apart from each other.

[0020] In one or more embodiments, the control element further includes a control line connected to the proximal end of the control arm.

[0021] 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.

[0022] By employing the above-described technical solution of the present invention, at least the following beneficial technical effects can be achieved:

[0023] In various embodiments of the present invention, the operating arm of the clamp adopts an inwardly biased design at its proximal end. Utilizing the internal locking structure, the structure of the clamp's operating arm and clamp seat is simple, with few component features and low cost. The locking structure uses the hole within the component itself to engage with the distal end of the control arm of the control element and acts on the proximal end of the clamp's operating arm, effectively supporting the opening at the proximal end of the operating arm, allowing the locking mechanism's latch to freely enter and exit the opening at the proximal end of the operating arm. Attached Figure Description

[0024] 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:

[0025] Figure 1 This is an exploded view of a tissue clamp according to an embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional view of a tissue clamp according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the clamp in a free state according to an embodiment of the present invention;

[0028] Figure 4 This is a perspective view of the distal end of the control arm according to an embodiment of the present invention;

[0029] Figure 5 This is a perspective view of the clamp and control component when they are connected according to an embodiment of the present invention;

[0030] Figure 6 This is a perspective view of the clamp and control component when they are connected according to an embodiment of the present invention.

[0031] Figure 7 This is a perspective view of the clamp and locking structure engaging according to an embodiment of the present invention;

[0032] Figure 8 This is a perspective view of the clamp and locking structure engaging according to an embodiment of the present invention;

[0033] Figure 9 This is a perspective view of the locking structure according to an embodiment of the present invention;

[0034] Figure 10This is a perspective view of a tissue clamp according to an embodiment of the present invention;

[0035] Figure 11 This is a perspective view of a tissue clamp according to an embodiment of the present invention;

[0036] Figure 12 This is a perspective view of a tissue clamp according to an embodiment of the present invention;

[0037] Figure 13 This is a perspective view of a tissue clamp according to an embodiment of the present invention;

[0038] Figure 14 This is a perspective view of a tissue clamp according to an embodiment of the present invention;

[0039] Figure 15 This is a perspective view of a tissue clamp according to an embodiment of the present invention;

[0040] Figure 16 This is a perspective view of a tissue clamp according to an embodiment of the present invention;

[0041] Figure 17 This is a perspective view of a tissue clamp according to an embodiment of the present invention; and

[0042] Figure 18 This is a perspective view of a tissue clamp according to an embodiment of the present invention. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] In embodiments of the invention, the proximal end refers to the end of the medical device closer to the operator, and the distal end refers to the end opposite the proximal end, such as the end closer to the object to be operated on, such as tissue, located within the body. Furthermore, the axial direction refers to the longitudinal direction of the control lines of the medical device, 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 closer to the body, and the proximal end refers to the end of the component closer to the outside.

[0048] 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.

[0049] Figure 1 This is an exploded view of a tissue clamp according to an embodiment of the present invention. Figure 2 This is a cross-sectional view of a tissue clamp according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the clamp in a free state according to an embodiment of the present invention. Figure 4 This is a perspective view of the distal end of the control arm according to an embodiment of the present invention. Figure 5 and Figure 6 This is a perspective view of the clamp and control component when they are connected according to an embodiment of the present invention. Figure 7 and Figure 8 This is a perspective view of the clamp and locking structure engaging according to an embodiment of the present invention, and Figure 9 This is a perspective view of the locking structure according to an embodiment of the present invention. References below. Figures 1 to 9 The tissue clamp 1 according to the first embodiment of the present invention will be described in detail.

[0050] refer to Figure 1 and Figure 2 ,in Figure 1 The various components of the tissue clamp 1 are schematically shown in an exploded view, and Figure 2 The clamp 10 and control element 30 are shown in an axial sectional view when they are connected to each other.

[0051] refer to Figure 1According to a first embodiment of the present invention, the tissue holder 1 includes a clamp 10, a clamp base 20, and a control member 30. The distal end of the clamp 10 has at least two clamping arms 11 extending distally, and the proximal end of the clamp 10 has an operating arm 12 extending proximally. The clamp base 20 may be, for example, cylindrical. A locking structure 21 is provided within the clamp base 20, and the proximal end of the clamp 10 is received within the clamp base 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 clamp base 20, such that the control member 30 can drive the clamp 10 to move axially along the clamp base 20 to change the open / closed state of the at least two clamping arms 11.

[0052] refer to Figure 2 When connected to the operating arm 12, the control arm 31 radially offsets the operating arm 12 outward. The control arm 31 is located radially outside the locking structure 21, such that as the control arm 31 separates from the operating arm 12, the operating arm 12 moves radially inward and engages with the locking structure 21 of the clamp 20 to lock the clamp 10 in the closed state.

[0053] refer to Figure 1 and Figure 2 In an exemplary embodiment, the control element 30 may further include a control line 32 connected to the proximal end of the control arm 31. The control arm 31 may include at least two arms whose proximal ends are close together and whose distal ends are radially spaced apart from each other. The tissue holder 1 may further include a delivery tube 40, the distal end of which may be releasably connected to the proximal end of the clamp 20, and the control line 32 may pass through the delivery tube 40.

[0054] The tissue clamp 1 may also include a handle 60 (see, for example, see...) Figure 18 The control line 32 is connected to the handle 60 at its proximal end. A pushing force (i.e., a force toward the distal end) or a pulling force (a force toward the proximal end) is applied to the control line 32 by the handle 60, so that the control member 30 can drive the clamp 10 axially toward the distal end or toward the proximal end to control the opening and closing of the clamp arm 11 of the clamp 10, that is, to change the opening and closing state of the clamp arm 11.

[0055] refer to Figure 2 and Figure 3 The operating arm 12 has a slit 12S formed on its proximal side. The slit 12S extends in the same direction as the overall extension of the operating arm 12, and extends from the proximal side of the operating arm 12 (i.e., the proximal side of the clamp 10) toward the distal side of the operating arm 12, for example, to the axial middle position of the operating arm 12.

[0056] exist Figure 2In the illustrated state, the distal end 31F of the control arm 31 is connected to the proximal end of the operating arm 12. At this time, the distal end 31F of the control arm 31 radially outwards the proximal end of the operating arm 12, such that the inner surfaces of the slots 12S of the operating arm 12 are substantially parallel to each other. In this state, the proximal end of the operating arm 12 tends to clamp radially inwards.

[0057] exist Figure 3 In the state shown, the operating arm 12 of the clamp 10 is in a free state, and the proximal end of the operating arm 12 is not subjected to any external force in the radial direction. Figure 3 As shown, the inner surfaces of the slits 12S of the operating arm 12 are not parallel to each other; for example, the radial spacing of the slits 12S gradually decreases toward the proximal end.

[0058] It should be noted that the gap 12S of the operating arm 12 is not limited to... Figure 2 and Figure 3 The described scenario. In principle, the proximal end of the control arm 12 should be radially offset outward when connected to the distal end 31F of the control arm 12 compared to its free state. With this arrangement, the proximal end of the control arm 12 is radially pushed outward by the distal end 31F of the control arm 31 when connected, thus the proximal end of the control arm 12 tends to clamp radially inward. When the control arm 31 separates from the control arm 12, the proximal end of the control arm 12 can clamp radially inward and engage with the locking structure 21, thereby locking the clamp 10 to the locking structure 21.

[0059] refer to Figure 4 The control arm 31 of the control member 30 according to an embodiment of the present invention is described, particularly the distal end 31F of the control arm 31. Figure 4 Schematic illustration Figure 1 A magnified view of the portion indicated by the dashed box R1 in the image.

[0060] In an exemplary embodiment, the distal end 31F 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.

[0061] The control arm 31 of the control member 30 can generally be axially extending sheet-like. For example, when a pair of control arms 31 are provided, the control arms 31 can 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 can be filamentous, strip-like, or rod-like, or it can be shaped 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 can also be filamentous, strip-like, rod-like, or sheet-like, or it can be shaped by twisting multiple strands of wire.

[0062] refer to Figure 1 and Figure 4 The distal end 31F of the control arm 31 has a varying width. The width of the shoulder portion 31S can be greater than the width of the control arm 31 body or the control line 32. In the direction from the proximal side to the distal side, the width of the shoulder portion 31S first increases until it reaches its maximum width, and then decreases near the neck 31N. The neck 31N connects the shoulder portion 31S and the enlarged end 31E and has a reduced width relative to both. In an exemplary embodiment, the enlarged end 31E may have a V-shaped bifurcated structure. The opening of the V-shaped bifurcated structure faces the distal side.

[0063] refer to Figure 5 and Figure 6 The description focuses on the engagement between the clamp 10 and the control element 30 during connection formation, particularly the fit between the proximal end of the operating arm 12 and the distal end 31F of the control arm 31. It should be noted that... Figure 2 , Figure 5 and Figure 6 Both describe the releasable connection formed between the clip 10 and the control element 30, therefore Figure 5 and Figure 6 Stereoscopic view and Figure 2 The corresponding sectional view.

[0064] Figure 5 The schematic diagram shows a perspective view of the connection between the proximal end of the operating arm 12 of the clamp 10 and the distal end 31F of the control arm 31 of the control member 30. Figure 6 Schematic illustration Figure 5 A magnified view of the portion indicated by the dashed box R2 in the image.

[0065] refer to Figure 5 and Figure 6In an exemplary embodiment, the locking structure 21 may be provided with an axially through-hole 21C for the distal end 31F of the control arm 31 to extend axially through the through-hole 21C, thereby forming 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, Figure 5 and Figure 6 As shown, the control arm through-hole 21C and the distal end 31F can have a rectangular cross-sectional shape. The shoulder 31S can have a gradually changing width, i.e., a smooth profile, which facilitates smooth passage of the control arm through-hole 21C when the shoulder 31S moves toward the proximal side.

[0066] In this embodiment of the invention, the control arm through holes 21C are radially spaced by a preset distance, so 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 pushes the proximal end of the operating arm 12 outward.

[0067] refer to Figure 5 and Figure 6 In an exemplary embodiment, the locking structure 21 may be located at the radial center of the clamp 20. This facilitates the arrangement of the control arm through-holes 21C and the control arms 31. For example, when a pair of control arms 31 and a pair of control arm through-holes 21C are provided, the control arms 31 and the control arm through-holes 21C can be arranged radially symmetrically. It should be noted that there may be three or more control arms 31, and correspondingly, there may be three or more control arm through-holes 21C.

[0068] In an exemplary embodiment, each operating arm 12 may have a radially inwardly opening 12H formed on the radially inner side of its proximal end. The neck 31N of the distal end 31F may fit into the opening 12H, such that the enlarged end 31E and the shoulder portion 31S may be located on opposite axial sides of the opening 12H and abut thereto.

[0069] In an exemplary embodiment, the enlarged end 31E can be radially deformed and disengaged from the abutment of the opening 12H under a predetermined traction force (i.e., tension) towards the proximal side. For example, as in combination Figure 4As described, the enlarged end 31E may have a V-shaped forked structure opening towards the distal end, 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, and can radially elastically deform to disengage from the abutment of the opening 12H when subjected to a predetermined traction force towards the proximal end. However, the embodiments of the present invention are not limited to this, and the enlarged end 31E may also have other forms and may not necessarily disengage from the abutment of the opening 12H by elastic deformation, for example, it may radially plastically deform to disengage from the abutment of the opening 12H when subjected to a predetermined traction force towards the proximal end.

[0070] exist Figure 6 In the indicated state, 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 end face of the operating arm 12 and prevent the operating arm 12 from moving toward the distal end. For example, when the operating arm 12 and the control arm 31 are axially kept relatively fixed and the tension applied to the control arm 31 is greater than a predetermined value, the V-shaped spring of the enlarged end 31E is deformed by the surface of the opening 12H, and the width of the enlarged end 31E is less than the width of the opening 12H, so that the enlarged end 31E can axially disengage from the abutment with the opening 12H.

[0071] On the one hand, as mentioned above, Figure 2 As described, when the control arm 31 is connected to the operating arm 12, it radially outwards biases the operating arm 12. Accordingly, in Figure 5 and Figure 6 In the illustrated state, the distal end 31F of the control arm 31 radially outwards biases the operating arm 12 via the neck 31N. In this state, the radially outer surface of the neck 31N of the distal end 31F abuts against the radially inner surface of the opening 12H of the operating arm 12, and radially outwards propels the proximal end of the operating arm 12, giving it a tendency to clamp radially inwards. In other words, the neck 31N, in conjunction with the opening 12H, achieves 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 this embodiment, the neck 31N is disposed between the enlarged end 31E and the shoulder 31S, and has a smaller dimension than the enlarged end 31E and the shoulder 31S. Therefore, when the neck 31N engages with the opening 12H to engage the proximal end of the operating arm 12 with the distal end 31F of the control arm 31, the enlarged end 31E and the shoulder 31S restrict the axial relative movement between the operating arm 12 and the control arm 31. Therefore, when the proximal end of the operating arm 12 is connected to the distal end 31F of the control arm 31, the axial and radial relative movement between the two is reliably restricted, so that a stable and releasable connection can be formed between them.

[0072] refer to Figure 7 and Figure 8The clamp 10 and locking structure 21 are described as engaging with each other. Specifically, the operating arm 12 and locking structure 21 of the clamp 10 engage with each other after the enlarged end 31E of the control arm 31 disengages axially from abutting the opening 12H of the operating arm 12. Figure 7 A perspective view schematically showing the engagement of the proximal end of the operating arm 12 of the clamp 10 and the locking structure 21, and Figure 8 Schematic illustration Figure 7 A magnified view of the portion indicated by the dashed box R3 in the image.

[0073] In an exemplary embodiment, the distal end of the locking structure 21 may have an enlarged portion 21E, a neck-shaped portion 21N, and a base portion 21B connected to the enlarged portion 21E via the neck-shaped portion 21N. In the closed state, the operating arm 12 is radially inwardly clamped within the neck-shaped portion 21N. The base portion 21B can prevent the operating arm 12 from moving proximally under the drive of the control arm 31. The neck-shaped portion 21N of the locking structure 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.

[0074] exist Figure 5 and Figure 6 In the indicated state, when a pulling force is applied to the control line 32 via the handle 60, the distal end 31F of the control arm 31 moves the proximal end of the operating arm 12 towards the proximal side. The shoulder portion 31S of the distal end 31F passes through the control arm through-hole 21C of the locking structure 21 from the distal side towards the proximal side, and the proximal side of the operating arm 12 begins to abut against the distal side of the base portion 21B of the locking structure 21. The operating arm 12 is blocked by the base portion 21B and cannot continue to move towards the proximal side. At this time, when the pulling force exceeds a predetermined value, the enlarged end 31E of the distal end 31F can deform radially and pass through the opening 12H, thereby disengaging from the abutment with the opening 12H, causing the proximal end of the operating arm 12 to separate from the distal end 31F of the control arm 31. Figure 7 and Figure 8 As shown, since the proximal end of the operating arm 12 tends to clamp radially inward, when the proximal end of the operating arm 12 separates from the distal end 31F of the control arm 31, the proximal end of the operating arm 12 moves radially inward and engages with the locking structure 21 of the clamp 20 to lock the clamp 10 in a closed state. In the closed state of the clamp 10, the proximal end of the operating arm 12 can be radially engaged with the neck portion 21N of the locking structure 21, and the enlarged portion 21E and the base portion 21B of the locking structure 21 restrict the axial movement of the proximal end of the operating arm 12.

[0075] In an exemplary embodiment, the axial position of the base portion 21B within the clamp 20 may be fixed. For example, in some examples, the base portion 21B may be fixedly connected to the inner wall of the clamp 20 by means of welding or the like, thereby being fixedly disposed within the clamp 20, so that the axial position of the base portion 21B within the clamp 20 is fixed.

[0076] In an exemplary embodiment, the base portion 21B may be formed in the shape of a disc, the enlarged portion 21E and the neck portion 21N are located in 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.

[0077] In an exemplary embodiment, such as Figure 7 and Figure 8 As shown, when the proximal end of the operating arm 12 clamps the neck-shaped portion 21N of the locking structure 21, the size of the channel formed by the opening 12H located radially inward on the proximal end of each operating arm 12 is smaller than the radial dimension of the enlargement 21E on the proximal side. This helps to prevent the proximal end of the operating arm 12 from moving towards the distal side relative to the enlargement 21E, thereby axially restricting the proximal end of the operating arm 12 between the enlargement 21E and the base portion 21B.

[0078] refer to Figure 9 The locking structure 21 according to embodiments of the present invention is described, and in particular, an exemplary structure of the locking structure 21 is described.

[0079] In an exemplary embodiment, the enlarged portion 21E of the locking structure 21 may include a cone or spherical head disposed at the distal end of the enlarged portion 21E, the diameter of which gradually decreases toward the distal side. During the movement of the operating arm 12 toward the proximal side to abut against the distal side of the base portion 21B of the locking structure 21, the cone or spherical head at the distal end of the enlarged portion 21E can guide the alignment of the enlarged portion 21E of the locking structure 21 with the gap 12S of the operating arm 12. Furthermore, during the sliding of the enlarged portion 21E into the opening 12H of the operating arm 12, the cone or spherical head also helps to reduce the friction between them, allowing the proximal end of the operating arm 12 to abut against the base portion 21B of the locking structure 21 more smoothly.

[0080] For example in Figure 9 In the illustrated embodiment, a cone is provided at the distal end of the enlarged portion 21E. The cone gradually tapers towards the distal end, that is, the apex of the cone is located on the distal end side and the base of the cone is located on the proximal end side. For example, as... Figure 9 As shown, the enlarged portion 21E may also include a cylinder disposed near the proximal end of the cone. For example, in... Figure 8In the illustrated embodiment, the enlarged portion 21E may include a frustum of diameter that gradually decreases in diameter towards the distal end of the enlarged portion 21E, and a cylinder disposed at the proximal end of the frustum. It should be noted that the shape of the enlarged portion 21E of the locking structure 21 is not limited to... Figure 8 and 9 The shape can be as shown, and can also have other shapes, such as a hemisphere, a composite shape of a hemisphere and a cylinder, a composite shape of a hemisphere and a frustum, etc.

[0081] like Figure 8 and 9 As shown, the enlarged portion 21E, the neck-shaped portion 21N, and the base portion 21B of the locking structure 21 can be integrally formed. However, the embodiments of the present invention are not limited to this; for example, the enlarged portion 21E, the neck-shaped portion 21N, and the base portion 21B can also be separate components.

[0082] refer to Figure 2 In an exemplary embodiment, the clamp 20 may further include a base stop 20S disposed at the proximal end of the clamp 20. The base stop 20S can be used to prevent the base portion 21B from moving towards the proximal end of the clamp 20. In an exemplary embodiment, the base stop 20S may be a flange, boss, tab, or step extending radially inward at the proximal end of the clamp 20. The base stop 20S may be integrally formed with the clamp 20, or it may be a separate component and fixedly connected to the clamp 20 by welding or other means.

[0083] The components, structure, and states of the tissue clamp 1 according to the first embodiment of the present invention have been described in detail above. The state switching or operating process of the tissue clamp 1 according to the first embodiment of the present invention is briefly described here.

[0084] exist Figure 2 and Figure 5 In the indicated state, the proximal end of the operating arm 12 of the clamp 10 is connected to the distal end 31F of the control arm 31 of the control member 30. The control arm through hole 21C of the locking structure 21 is configured such that the distal end 31F of the control arm 31 is radially spaced, causing the distal end 31F of the control arm 31 to be radially outwardly extended, thereby causing the proximal end of the operating arm 12 to be radially outwardly extended.

[0085] Due to the fit between the opening 12H of the operating arm 12 and the neck 31N, enlarged end 31E, and shoulder 31S of the distal end 31F, a reliable and stable releasable connection can be formed between the proximal end of the operating arm 12 and the distal end 31F of the control arm 31. When a pushing or pulling force is applied to the control line 32, the distal end 31F of the control arm 31 drives the proximal end of the operating arm 12 to move toward the distal or proximal side, thereby realizing the repeated opening and closing of the clamping arm 11 until the clamping arm 11 accurately clamps the tissue.

[0086] When the control arm 31 moves towards the proximal side, it causes the operating arm 12 to move towards the proximal side to abut against the distal side of the base portion 21B of the locking structure 21. When a predetermined tension is applied to the control line 32, the enlarged end 31E of the distal end 31F deforms and passes through the opening 12H, disengaging from the opening 12H, thereby separating the proximal end of the operating arm 12 from the distal end 31F of the control arm 31. Simultaneously, since the proximal end of the operating arm 12 has a tendency to clamp radially inward, it clamps the neck portion 21N of the locking structure 21 radially inward. Due to the construction of the locking structure 21, the proximal end of the operating arm 12 is reliably confined between the enlarged portion 21E and the base portion 21B of the locking structure 21, that is, Figure 7 The state shown. This achieves a secure engagement between the operating arm 12 of the clamp 10 and the locking structure 21 of the clamp seat 20.

[0087] The above has been referenced Figures 1 to 9 A tissue clamp 1 according to a first embodiment of the present invention is described. Reference will be made below. Figures 10 to 13 The tissue clamp 1 according to a second embodiment of the present invention will be described, and its differences from the tissue clamp 1 according to a first embodiment of the present invention will be mainly described.

[0088] Figure 10 , Figure 11 , Figure 12 and Figure 13 These are perspective views of a tissue clamp according to an embodiment of the present invention. Figures 10 to 13 The overall structure of the tissue clamp 1 is shown on the left, and a partial structure of the tissue clamp 1 is shown on the right. For example, Figures 10 to 13 Enlarged views of the portions indicated by the dashed boxes R4, R5, R6, and R7 on the left are shown on the right side, respectively. Additionally, Figure 10 and Figure 12 This is a view taken from the proximal side, and Figure 11 and Figure 13 This is a view taken from the far side.

[0089] refer to Figures 10 to 13 In the tissue holder 1 according to the second embodiment of the present invention, the proximal end of the operating arm 12 may be provided with a tail hook portion 12K, and the locking structure 21 may be provided with an axially penetrating tail hook portion through hole 21K, which may be located radially outside the control arm through hole 21C. In the closed state, the proximal end of the tail hook portion 12K may axially pass through the tail hook portion through hole 21K and radially clamp the locking structure 21.

[0090] Unlike the tissue clamp 1 according to the first embodiment of the present invention, in the second embodiment of the present invention, a tail hook portion 12K is provided at the proximal end of the operating arm 12, and the tail hook portion 12K is provided, for example, radially outside the slot 12S of the operating arm 12. Furthermore, the locking structure 21 is also correspondingly provided with a tail hook portion through hole 21K located radially outside the control arm through hole 21C. For example, both the tail hook portion through hole 21K and the control arm through hole 21C may be provided on the base portion 21B of the locking structure 21. Moreover, the locking structure 21 may not have the enlarged portion 21E and the neck portion 21N (see, for example, see...). Figure 8 and Figure 9 ).

[0091] Similar to the tissue clamp 1 in the first embodiment of the present invention, in the second embodiment of the present invention, the opening 12H of the operating arm 12 cooperates with the neck 31N, the enlarged end 31E and the shoulder 31S of the distal end 31F of the control arm 31, and 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.

[0092] Subsequently, reference Figure 10 and Figure 11 When the control arm 31 moves toward the proximal side, it drives the operating arm 12 to move toward the proximal side to abut against the distal side of the base portion 21B of the locking structure 21, and the tail hook portion 12K of the operating arm 12 enters the tail hook portion through hole 21K of the locking structure 21.

[0093] Next, refer to Figure 12 and Figure 13 When a predetermined tension is applied to the control line 32, the enlarged end 31E of the distal end 31F deforms and passes through the opening 12H, thus separating the proximal end of the operating arm 12 from the distal end 31F of the control arm 31. At the same time, since the proximal end of the operating arm 12 has a tendency to clamp radially inward, the tail hook portion 12K clamps the locking structure 21 radially inward, hooking the base portion 21B of the locking structure 21.

[0094] Figure 14 , Figure 15 , Figure 16 , Figure 17 and Figure 18 These are perspective views of a tissue clamp according to an embodiment of the present invention. The following will combine... Figure 1 , Figure 2 , Figures 14 to 18 The connection and disconnection of the release component and delivery assembly in a tissue clamp according to an embodiment of the present invention are described.

[0095] refer to Figure 1 and Figure 2In an exemplary embodiment, the tissue holder 1 may further include a first connecting member 51 fixedly connected to the proximal end of the clamp 20, a second connecting member 52 fixedly connected to the distal end of the delivery tube 40, and a restraining member 53. The first connecting member 51 and the second connecting member 52 are capable of interlocking or disinterlocking by radial relative movement, wherein the first connecting member 51 and the second connecting member 52 are axially fixed relative to each other when interlocking is formed. The restraining member 53 may, for example, be annular and configured to move axially between a restrained position and a released position. In the restrained position, the restraining member 53 may be fitted around the outer periphery of the interlocked 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. In the released position, the restraining member 53 may expose the interlocked portion to allow radial relative movement between the first connecting member 51 and the second connecting member 52.

[0096] The first connecting component 51 can be fixedly connected to the clamp 20 of the tissue holder 1, or it can be integrally formed with the clamp 20 and become part of the clamp 20.

[0097] One of the first connecting member 51 and the second connecting member 52 includes a pair of mortises arranged radially opposite each other, and the other includes a pair of tenons arranged radially opposite each other, whose shapes match the mortises. For example, in Figure 1 , Figure 2 and Figure 18 In the illustrated embodiment, the first connecting member 51 may include a mortise and the second connecting member 52 may include a tenon.

[0098] The interlocking portions of the first connecting member 51 and the second connecting member 52 can form a cylinder. The constraint member 53 is provided with a radially limiting portion located radially inner relative to the annular wall of the constraint member 53 and forming a control through-hole with a dimension 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 the control through-hole, and a control line 32 passes through the control through-hole of the constraint member 53, allowing the constraint member 53 to move towards the proximal side under the drive of the control member 30.

[0099] The constraint member 53 may also be provided with an axially through connecting hole, which is formed, for example, between the annular wall of the constraint member 53 and the radial limiting portion. At least a portion of the second connecting member 52 extends axially through the connecting hole, so that the constraint member 53 is sleeved on the second connecting member 52 and can move axially along the at least a portion.

[0100] The second connecting member 52 has a distal connecting piece extending distally, which passes through a connecting through hole from the proximal side of the restraining member 53 to the distal side for connection with the first connecting member 51. Optionally, the second connecting member 52 has a proximal connecting piece extending proximally, which passes through a connecting through hole from the distal side of the restraining member 53.

[0101] The second connecting member 52 may include a distal connecting tube 52F and a proximal connecting tube 52N. The distal connecting tube 52F is used to connect with the first connecting member 51. One of the distal connecting tube 52F and the proximal connecting tube 52N has a connecting piece extending toward the other, and the connecting piece passes through the connecting through hole of the restraining member 53 to be fixedly connected to the other.

[0102] The proximal connecting sleeve 52N forms an axially movable snap-fit ​​with the constraint member 53 at the distal end, and this snap-fit ​​defines the constraint position and release position of the constraint member 53.

[0103] During assembly, the distal end 31F of the control arm 31 of the control component 30 passes through the control arm through hole 21C of the locking structure 21, then through the opening 12H at the proximal end of the operating arm 12, and then these components are inserted into the clamp 20. They are then inserted into the mortise and tenon mechanism until the control component 30 is connected to the proximal handle 60, thus completing the instrument installation of the tissue clamp 1. When installing the mortise and tenon mechanism, the distal connecting sleeve 52F of the second connecting component 52 passes through the restraining component 53 and connects to the clamp 20, and is then fixedly connected to the proximal connecting sleeve 52N. Finally, the restraining component 53 circumferentially restrains the mortise and tenon structure.

[0104] refer to Figures 14 to 16 When the proximal end of the operating arm 12 forms a releasable connection with the distal end 31F of the control arm 31 (e.g. Figure 2 and Figure 5 (As shown) After applying a pushing or pulling force to the control line 32, the control arm 31 moves 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 14 As shown. In actual use, it may be necessary to repeatedly open and close the clamping arm 11, such as... Figure 15 As shown, until the clamping arm 11 is completely closed and accurately clamps the tissue, as Figure 16 As shown.

[0105] exist Figures 14 to 16 In the middle, the constraint member 53 is in the constraint position, and the clamp 10 is connected to the second connection member 52 through the first connection member 51.

[0106] When the clamping arm 11 of the clamp 10 is fully closed, the clamp 10 (operating arm 12) has been effectively disengaged from the control arm 31 of the control member 30 (especially the distal end 31F of the control arm 31), such as Figure 7 As shown. Reference Figure 17 In this state, the restraining member 53 is in the released position. At this time, the interlocking parts of the first connecting member 51 and the second connecting member 52 are no longer restrained by the restraining member 53, and the clamp 10 and the first connecting member 51 can be separated from the second connecting member 52 radially.

[0107] refer to Figure 18 The tissue holder 1 may also 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 18 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 (also referred to as the release member) can be effectively separated from the restraint member 53, the second connecting member 52, the delivery tube 50, the control line 32, 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.

[0108] 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; a cylindrical clip seat having a locking structure disposed therein, the proximal end of the clip being received in the clip seat; and a control member comprising a control arm extending distally, the control arm being releasably connected with the operating arm in the clip seat so 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 locking structure is provided with a control arm through hole extending axially therethrough for the distal end of the control arm to extend axially therethrough to be releasably connected with the operating arm, the control arm biasing the operating arm radially outward when connected with the operating arm, and the operating arm moving radially inward to engage with the locking structure of the clip seat to lock the clip in the closed state as the control arm is disconnected with the operating arm. The locking structure is disposed at a radially central position of the clip seat.

2. The tissue holder of claim 1, wherein, A distal end of the locking structure is formed with an enlarged portion, a neck portion and a base portion connected with the enlarged portion via the neck portion, the operating arm being clamped radially inward at the neck portion in the closed state.

3. The tissue holder of claim 1, wherein, The base portion blocks the operating arm from moving proximally under the drive of the control arm.

4. The tissue holder of claim 3, wherein, The axial position of the base portion in the clip seat is fixed.

5. The tissue holder of claim 4, wherein, The base portion is formed in a disc shape, the enlarged portion and the neck portion being located at a center of the base portion, and the control arm through hole being located radially outward of the enlarged portion and the neck portion.

6. The tissue holder of any one of claims 3-5, wherein, The enlarged portion comprises a conical body or a spherical head gradually reducing in diameter distally disposed at a distal end of the enlarged portion.

7. The tissue holder of claim 3, wherein, The enlarged portion further comprises a cylindrical body disposed at a proximal end of the conical body.

8. The tissue holder of claim 7, wherein, A proximal end of the operating arm is provided with a tail hook portion, the locking structure being provided with a tail hook portion through hole extending axially therethrough, the tail hook portion through hole being located radially outward of the control arm through hole, and a proximal end of the tail hook portion extending axially through the tail hook portion through hole and clamping the locking structure radially in the closed state.

9. The tissue holder of claim 1, wherein, A proximal end of each operating arm is formed with an opening open radially inward, and a distal end of the control arm is formed with an enlarged end and a shoulder portion connected with the enlarged end via a neck portion, the neck portion being fitted in the opening so that the enlarged end and the shoulder portion are located at axial 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 traction force proximally.

10. The tissue holder of claim 1, wherein, The enlarged end has a V-shaped bifurcated structure.

11. The tissue holder of claim 10, wherein, The control arm comprises at least two arms with proximal ends close together and distal ends radially spaced apart from each other.

12. The tissue holder of claim 1, wherein, The control member further comprises a control wire connected at the proximal ends of the control arms.

13. The tissue holder of claim 1, wherein, 14. The tissue holder according to claim 13, further comprising a delivery tube, a distal end of the delivery tube being releasably connected to a proximal end of the clip seat, and the control wire being threaded in the delivery tube to connect a handle for operating the control wire. ​

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