Vascular closure device

Abstract

The utility model provides a blood vessel closing device which comprises a base body and a knob. The base body is provided with a first suture channel arranged in the first direction and a knob containing cavity arranged in the second direction, and the first suture channel penetrates through and communicates with the knob containing cavity. The knob is provided with a second suture channel, the knob is rotatably arranged in the knob containing cavity around a rotating axis extending in the second direction, and a gap is formed between the knob and the cavity wall of the knob containing cavity; when the knob is located at the initial position, the second suture channel is aligned with the first suture channel in a penetrating manner, and a suture is allowed to movably penetrate through the first suture channel and the second suture channel which are aligned in a penetrating manner; the knob is configured to drive the suture in the second suture channel and the suture in the first suture channel to be staggered when rotating from the initial position to the locking position, so that the suture is pulled to enter the gap to form drawing of the suture; the base body is configured to compress the target tissue under the pulling action of the suture.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a blood vessel closure device. Background Technology

[0002] Interventional vascular surgery is widely used in the treatment of cardiovascular and cerebrovascular diseases, structural heart disease, peripheral vascular disease, and electrophysiological diseases, and its development has been rapid due to its advantages of being minimally invasive, time-saving, safe, and efficient. With the development of medical devices, an increasing number of vascular diseases are being treated with minimally invasive interventional surgeries. To reduce patient suffering, some surgical procedures, such as valve replacement and pacemaker implantation, have been converted to interventional procedures. Consequently, the complexity of interventional surgeries has gradually increased. To accommodate the use of complex instruments, vascular openings have gradually become larger, up to a maximum of 30 Fr. Vascular openings of this size cannot be stopped by conventional bandaging and compression; suturing followed by compression is necessary to effectively close the vessel postoperatively.

[0003] Current methods of vascular closure, such as using sutures in conjunction with tourniquets, can effectively achieve hemostasis, but patients need to maintain a fixed position for a relatively long period after the operation, usually 6-8 hours, and medical staff need to frequently depressurize to reduce the risk of ischemia. There are also suture-based or implantable vascular closure devices, but these also have drawbacks such as higher cost, fixed size, and a higher probability of complications. Utility Model Content

[0004] The purpose of this invention is to provide a vascular closure device to solve the problems of low safety and comfort in existing vascular closure methods.

[0005] To solve the above-mentioned technical problems, this utility model provides a blood vessel closure device, which includes: a base and a knob;

[0006] The substrate has a first suture channel arranged along a first direction and a knob receiving cavity arranged along a second direction, the first suture channel passing through and communicating with the knob receiving cavity; the knob has a second suture channel, the knob is rotatably disposed in the knob receiving cavity about a rotation axis extending along the second direction, and there is a gap between the knob and the cavity wall of the knob receiving cavity;

[0007] When the knob is in the initial position, the second suture channel is aligned with the first suture channel, allowing the suture to move through the aligned first and second suture channels.

[0008] When the knob is configured to rotate from the initial position to the locked position, it causes the suture in the second suture channel to be misaligned with the suture in the first suture channel, thereby pulling the suture into the gap to form a pull on the suture.

[0009] The matrix is ​​configured to compress the target tissue under the tension of the suture.

[0010] Optionally, the vascular closure device further includes a cutting component;

[0011] The substrate has a cutting channel arranged in a third direction, the cutting channel intersecting with the first suture channel;

[0012] The cutting assembly includes a blade head that is movably disposed in the cutting channel for cutting the suture thread passing through the first suture channel.

[0013] Optionally, the first suture channel extends along the second direction with a first end and a second end; the blade extends along the second direction with a width that at least covers the first end and at most does not extend beyond the second end; the first suture channel is divided into a first segment and a second segment by the knob receiving cavity, wherein the first segment is a segment close to the substrate for abutting against the target tissue, and the cutting channel intersects with the first segment.

[0014] Optionally, the substrate has a cutting range marking, which corresponds to the extension width range of the cutter head along the second direction.

[0015] Optionally, the cutting assembly further includes a protective element that switches between a protected state and a deactivated state; when the protective element is in the protected state, it prevents the cutter head from moving in the cutting channel; when the protective element is in the deactivated state, it releases the restriction on the cutter head to allow the cutter head to move in the cutting channel.

[0016] Optionally, the cutting assembly further includes a potential energy element, wherein the cutter head is configured to be located outside the first suture channel under the potential energy of the potential energy element when not subjected to external force.

[0017] Optionally, both the first suture channel and the second suture channel are grooves with openings along the second direction.

[0018] Optionally, the outer peripheral wall of the knob and / or the cavity wall of the knob receiving cavity have an uneven structure; or, the outer peripheral wall of the knob and / or the cavity wall of the knob receiving cavity are cylindrical in shape.

[0019] Optionally, the gap is not greater than the outer diameter of the suture, so that the suture deforms when it is pulled into the gap.

[0020] Optionally, the vascular closure device further includes a suture, one end or a folded end of which is used for suturing and fixing to the target tissue, and the other end or a free end of which is used to pass through the first suture channel and the second suture channel.

[0021] In summary, the vascular closure device provided by this utility model includes: a base and a knob; the base has a first suture channel arranged along a first direction and a knob receiving cavity arranged along a second direction, the first suture channel penetrating and communicating with the knob receiving cavity; the knob has a second suture channel, the knob is rotatably disposed in the knob receiving cavity about a rotation axis extending along the second direction, and there is a gap between the knob and the cavity wall of the knob receiving cavity; when the knob is in the initial position, the second suture channel is aligned with the first suture channel, allowing the suture to move through the aligned first suture channel and the second suture channel; when the knob is configured to rotate from the initial position to the locked position, it causes the suture in the second suture channel to misalign with the suture in the first suture channel, thereby pulling the suture into the gap to form a pull on the suture; the base is configured to compress the target tissue under the pull of the suture.

[0022] With this configuration, after the suture is inserted into the first and second suture channels, rotating the knob can pull the suture in and out. This pulling of the suture causes the substrate to press down, creating pressure on the target tissue. The entire device is simple in structure, low in cost, very convenient to use and operate, and highly safe. Attached Figure Description

[0023] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention.

[0024] Figure 1 This is a schematic diagram of a blood vessel closure device according to an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the suture and target tissue in an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the knob in its initial position according to an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the knob in the locked position according to an embodiment of the present invention.

[0028] Figure 5This is a schematic diagram of the suture being pulled and extended according to an embodiment of the present invention.

[0029] Figure 6 This is a schematic diagram showing the relative relationship between the cutting channel and the first suture channel in an embodiment of the present invention.

[0030] Figure 7 This is a schematic diagram of the cutting component according to an embodiment of the present invention.

[0031] Figure 8 and Figure 9 This is a schematic diagram of the protective component according to an embodiment of the present utility model.

[0032] Figure 10 This is a schematic diagram of a blood vessel closure device according to another embodiment of the present invention.

[0033] In the attached diagram: 1-substrate; 11-first suture channel; 111-first end; 112-second end; 113-first section; 114-second section; 12-knob receiving cavity; 13-cutting channel; 14-pressing patch; 2-knob; 21-second suture channel; 22-handle; 3-suture; 4-target tissue; 41-blood vessel; 5-cutting assembly; 51-blade; 52-potential energy element; 53-button; 54-protective element; 6-concave-convex structure. Detailed Implementation

[0034] To make the objectives, advantages, and features of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the objectives of the embodiments of this utility model. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, different drawings may emphasize different aspects and sometimes use different scales.

[0035] As used herein, the singular forms “a,” “an,” “one,” and “the” include plural objects; the term “or” is generally used to include the meaning of “and / or”; the term “a number” is generally used to include the meaning of “at least one”; and the term “at least two” is generally used to include the meaning of “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature; “one end” and “the other end,” and “proximal end” and “distal end” generally refer to two corresponding parts, which include not only endpoints. The terms “proximal end” and “distal end” are defined herein with respect to an implantable device having an end for insertion into the human body and a control end extending outside the body. The term "proximal" refers to the position closer to the protruding control end of the implanted device, and the term "distal" refers to the position closer to the end of the implanted device that is inserted into the body and therefore further away from the control end of the implanted device. Optionally, in manual or hand-operated applications, the terms "proximal" and "distal" are defined herein in relation to the operator, such as a surgeon or clinician. The term "proximal" refers to the position closer to the operator, and the term "distal" refers to the position closer to the implanted device and therefore further away from the operator. Furthermore, as used in this invention, terms such as "installed," "connected," "attached," and "set" of one element on another should be interpreted broadly, generally indicating only a connection, coupling, cooperation, or transmission relationship between the two elements, which can be direct or indirect through an intermediate element. It should not be construed as indicating or implying a spatial positional relationship between the two elements, i.e., one element can be located inside, outside, above, below, or to one side of the other element, unless otherwise explicitly stated. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, directional terms such as above, below, up, down, upward, downward, left, right, etc., are used relative to exemplary embodiments as they are shown in the figures, with upward or up direction pointing towards the top of the corresponding figure, and downward or down direction pointing towards the bottom of the corresponding figure.

[0036] The purpose of this invention is to provide a vascular closure device to solve the problems of low safety and comfort in existing vascular closure methods. The following description refers to the accompanying drawings.

[0037] Please refer to Figures 1 to 10This utility model provides a vascular closure device, comprising: a base 1 and a knob 2; the base 1 has a first suture channel 11 arranged along a first direction and a knob receiving cavity 12 arranged along a second direction, the first suture channel 11 penetrating and communicating with the knob receiving cavity 12; the knob 2 has a second suture channel 21, the knob 2 is rotatably disposed in the knob receiving cavity 12 about a rotation axis extending along the second direction, and there is a gap between the knob 2 and the cavity wall of the knob receiving cavity 12; when the knob 2 is in the initial position When the second suture channel 21 is aligned with the first suture channel 11, the suture 3 is allowed to move through the aligned first suture channel 11 and the second suture channel 21. The knob 2 is configured to, when rotated from the initial position to the locked position, cause the suture 3 in the second suture channel 21 to be misaligned with the suture 3 in the first suture channel 11, thereby pulling the suture 3 into the gap to form a pull on the suture 3. The substrate 1 is configured to compress the target tissue 4 under the pull of the suture 3.

[0038] Please refer to Figure 2 This illustration demonstrates an application scenario of the vascular closure device provided in this embodiment. The folded-back end of the suture 3 is used for suturing and fixing to the target tissue 4. The target tissue 4 may include human tissue such as blood vessels 41. Both ends of the suture 3 protrude from the target tissue 4, forming two free ends. In practical applications, the two ends of the suture 3 can be pulled back while simultaneously compressing the target tissue 4. The vascular closure device provided in this embodiment can achieve this effect. Of course... Figure 2 The illustration shown is merely a demonstrative application scenario and not a limitation on the suturing method of suture 3. In other embodiments, suture 3 can also be fixed at one end, that is, one end of suture 3 is used to suture and fix to the target tissue 4, for example, by tying a knot, and the other end of suture 3 passes through the target tissue 4. At this time, pulling the suture 3 that has passed through the target tissue 4, combined with applying pressure to the target tissue 4, can also achieve the effect of vascular closure. Therefore, it can be understood that the suture 3 passing through the first suture channel 11 and the second suture channel 21 can be single-stranded or double-stranded. In some complex application scenarios, the suture 3 passing through the first suture channel 11 and the second suture channel 21 can also be multi-stranded, which is not limited in this embodiment.

[0039] In an alternative example, the first and second directions are perpendicular to each other, with the first direction as the z-axis and the second direction as the x-axis. Optionally, the substrate 1 has a pressing patch 14 on the side facing the target tissue 4, which is used to abut against and adhere to the surface of the target tissue 4 (such as skin) to achieve pressure on the target tissue 4. Optionally, the knob 2 has a handle 22 for easy application of force and operation.

[0040] The first suture channel 11 is opened along the z-axis direction. It can be a hole, cavity, or groove penetrating the substrate 1, and its cross-sectional dimension is larger than the outer diameter of the suture 3 (or larger than the sum of the cross-sectional dimensions of several strands of suture 3) to facilitate the insertion of the suture 3. The knob receiving cavity 12 is opened on the substrate 1 along the x-axis direction. The knob 2 can be disposed in the knob receiving cavity 12 along the x-axis direction, and the knob 2 can be in its initial position (e.g., around the rotation axis extending along the x-axis direction) around the rotation axis. Figure 3 (as shown) and locking position (as shown) Figure 4 Rotate between (as shown).

[0041] It should be noted that the first and second directions are not necessarily straight lines. In some embodiments, the first or second direction can also be a direction with a certain curvature or bend. Therefore, the first suture channel 11 or the second suture channel 21 is not limited to extending in a straight line; it can also have a certain arc or bend shape, which will not affect the threading and pulling of the suture 3. The first and second directions are also not necessarily perpendicular to each other; as long as they can form an angle, they can be achieved.

[0042] Please refer to Figure 3 When the knob 2 is in its initial position, the second suture channel 21 is aligned with the first suture channel 11, allowing the suture 3 to move freely through the aligned first and second suture channels 11. It should be understood that the alignment of the second suture channel 21 with the first suture channel 11 does not mean that the second suture channel 21 and the first suture channel 11 must be strictly coaxial or identical; their cross-sectional shapes or sizes can differ. Alignment means that both ends of the second suture channel 21 along the z-axis have an overlap area with the first suture channel 11 of at least a size large enough for the suture 3 to pass through. This allows the suture 3 to move freely through the channel.

[0043] Please refer to Figure 4 After knob 2 rotates a certain angle around the rotation axis extending along the x-axis, it reaches the locked position. (Refer to reference...) Figure 2 The suture 3 is essentially fixed at one end of the target tissue 4 (or the folded-back end in some applications). The end of the suture 3 away from the target tissue 4 (or the free end in some applications) is preferably straightened after passing through the first suture channel 11 and the second suture channel 21 to reduce slack. Then, by rotating the knob 2, the suture 3 in the second suture channel 21 will be misaligned with the suture 3 in the first suture channel 11, and the suture 3 will be pulled into the gap between the knob 2 and the wall of the knob receiving cavity 12. If a part of the suture 3 is fixed to the substrate 1 at this time, the substrate 1 will compress the target tissue 4 under the pulling action of the suture 3.

[0044] In one embodiment, the gap between the knob 2 and the cavity wall of the knob receiving cavity 12 is no greater than the outer diameter of the thread 3, so that the thread 3 deforms when pulled into the gap. At this time, the portion of the thread 3 in the gap is equivalent to forming a fixed relationship with the base 1, the original length of the thread 3 is stretched, the thread tightens, causing the entire device to press down. At the same time, the knob 2 is also limited by the reaction force of the compression deformation of the thread 3, that is, the rotation of the knob 2 is limited to the locked position.

[0045] Please refer to Figure 5 As knob 2 rotates from the initial position to the locked position, the total length L of suture 3 changes from L1+L2+L3 to L1+L2+L3+L4+L5. The length of suture 3 is stretched, partly due to the extension of the suture material itself, and partly due to the tightening of suture 3 within the target tissue 4. Simultaneously, the pressure patch 14 of the base 1 contacts and abuts against the surface of the target tissue 4 (such as skin), providing pressure to the blood vessel openings of the target tissue 4, thereby achieving compression hemostasis.

[0046] Optionally, the gap does not necessarily have to be smaller than the outer diameter of the suture 3. In some embodiments, the suture 3 can also be fixed to the substrate 1. For example, after the end of the suture 3 away from the target tissue 4 passes through the first suture channel 11, it can be fixed to the substrate 1 by coiling or knotting. In this case, it is not limited to relying on the deformation of the suture 3 in the gap to achieve fixation. Of course, in this case, an additional rotation limiting structure can be provided for the knob 2 to limit the rotation of the knob 2 to the locked position, maintaining pressure on the target tissue 4 for a period of time.

[0047] In one example, the outer diameter of knob 2 must be within the tensile range that suture 3 can withstand. For large-diameter blood vessel openings, the maximum can be about 1 cm. The pressure area of ​​the base 1 on the target tissue 4 is usually a circular area with a diameter of no more than 5 cm. Hemostasis usually requires a pressure of 300 mmHg to 500 mmHg, which requires a pressure force of about 80 N. Taking the suture 3 used for vascular suturing as a No. 0 suture as an example, its tensile strength is usually about 60 N, and the combined tensile strength of two strands of suture 3 is about 120 N. When each strand of suture 3 is at the position corresponding to a pressure force of 40 N, the displacement of suture 3 is about 1 cm. Combined with the 1 cm that the skin of the target tissue 4 may be pressed down, the corresponding displacement is reflected in the outer diameter of knob 2. The outer diameter of knob 2 can be configured within 1.5 cm. The maximum rotation angle of knob 2 from the initial position to the locked position is about 210 degrees, that is, the displacement of suture 3 is within 3 cm.

[0048] Preferably, both the first suture channel 11 and the second suture channel 21 are grooves with openings along the second direction. In application, to facilitate the insertion of the suture 3, the first suture channel 11 and the second suture channel 21 can be configured as grooves opening towards the second direction, so that the suture 3 can enter the first suture channel 11 and the second suture channel 21 laterally along the openings in the second direction, which facilitates operation.

[0049] Please refer to Figure 6 and Figure 7 Preferably, the vascular closure device further includes a cutting component 5; the base 1 has a cutting channel 13 arranged in a third direction, the cutting channel 13 intersecting with the first suture channel 11; the cutting component 5 includes a blade 51, the blade 51 being movably disposed in the cutting channel 13 for cutting the suture 3 passing through the first suture channel 11.

[0050] The third direction is an angled direction to both the first and second directions. In one example, the third direction is perpendicular to both the first and second directions. Taking the third direction as the y-axis, the blade 51 can move along the y-axis. After the knob 2 is turned to the locked position and pressure is applied to the target tissue 4 for a period of time, the blood vessel is basically closed. At this time, the suture 3 can be cut by moving the blade 51 towards the first suture channel 11. After the suture 3 is cut, the entire blood vessel closure device can be removed. It should be understood that the third direction is not limited to a straight line. In other embodiments, the third direction can also be a direction with a certain curvature or bend. Therefore, the cutting channel 13 is not limited to extending in a straight line; it can also have a certain curvature or bend, which will not affect the movement of the blade 51 and the cutting of the suture 3. The third direction is also not limited to being perpendicular to the first or second direction. The third direction can be achieved as long as it forms an angle with the first or second direction.

[0051] Optionally, the first suture channel 11 has a first end 111 and a second end 112 extending along the second direction; the blade 51 extends along the second direction, at least covering the first end 111 and at most not exceeding the second end 112. To improve the reliability of the cutting assembly 5 when performing cutting, the first suture channel 11 can be configured to have a certain extension width along the second direction (x-axis direction). Since the blade 51 extends along the second direction, at least covering the first end 111, it is understood that the suture 3 can be reliably cut when it is as close as possible to the first end 111 along the x-axis direction. In an alternative example, the blade 51 extends along the second direction, exceeding the first end 111 by at least 0.5 mm, to ensure reliable coverage of the first suture channel 11 at the first end 111, thus ensuring reliable cutting.

[0052] On the other hand, the extension width of the blade 51 along the second direction does not exceed the second end 112 at most, ensuring that the blade 51 will not extend beyond the first suture channel 11 during cutting, thus avoiding danger. In one embodiment, the extension width of the blade 51 along the second direction may be at a certain distance from the second end 112 to reduce the risk of misoperation of the cutting component 5. The suture 3 cannot be cut at all width positions in the first suture channel 11 along the x-axis direction, but only in certain areas. Preferably, the area of ​​the first suture channel 11 that can be cut along the x-axis direction is not less than 5mm to ensure normal use. Optionally, the base 1 has a cutting range marking, which corresponds to the extension width of the blade 51 along the second direction.

[0053] Preferably, the first suture channel 11 is divided into a first segment 113 and a second segment 114 by the knob receiving cavity 12. The first segment 113 is the segment close to the substrate 1 used to abut against the target tissue 4, and the cutting channel 13 intersects with the first segment 113. The intersection of the cutting channel 13 and the first segment 113 means that the suture 3 is cut in the first segment 113, i.e., the segment close to the target tissue 4. With this configuration, the segment of the suture 3 deformed by the knob 2 is located at the end of the cutting point away from the target tissue 4, which will not affect the subsequent removal of the suture 3 and avoids the risk of tissue blockage caused by the deformed segment of the suture 3. At the same time, the cutting position of the suture 3 conforms to clinical usage habits.

[0054] Optionally, the cutting assembly 5 further includes a potential energy element 52. When the cutter head 51 is not subjected to external force, it is positioned outside the first suture channel 11 under the influence of the potential energy of the potential energy element 52. The inclusion of the potential energy element 52 effectively improves the reliability of the cutting assembly 5 and reduces accidental cutting caused by false triggering. The potential energy element 52 may include an elastic potential energy element (such as a spring) or a magnetic potential energy element (such as a group of magnets with opposite poles), which can, for example, apply an elastic force or magnetic force to the cutter head 51 in a direction away from the first suture channel 11, so that the cutter head 51 is in a position away from the first suture channel 11 when not pressed.

[0055] In an alternative example, the cutting assembly 5 further includes a button 53, which may be fixedly connected to the cutter head 51. The potential energy element 52 includes a spring, with its two ends connected to the button 53 and the base 1, respectively. During cutting, the operator presses the button 53, causing the cutter head 51 to move along the y-axis. At this time, the spring is compressed and stores potential energy. After the cutter head 51 enters the first suture channel 11 to cut the suture 3, the operator releases the button 53, the spring releases its potential energy, and the cutter head 51 returns to a position away from the first suture channel 11.

[0056] For further details, please refer to... Figure 8 and Figure 9 The cutting assembly 5 further includes a protective member 54, which switches between a protected state and a deactivated state. When the protective member 54 is in the protected state, it prevents the blade 51 from moving within the cutting channel 13. When the protective member 54 is in the deactivated state, it releases the restriction on the blade 51, allowing it to move within the cutting channel 54. In one example, the protective member 54 is movably inserted into the base 1 along the z-axis or x-axis. When it moves along the z-axis or x-axis to overlap with the y-direction position of the button 53, it is in the protected state. At this time, the movement of the button 53 along the y-axis is blocked by the protective member 54, preventing it from being pressed down. Thus, the blade 51 is effectively limited and cannot move along the cutting channel 54 to cut the stitch 3. This prevents accidental activation when cutting is not desired and protects the stitch 3. When the protective element 54 moves along the z-axis or x-axis to a position offset from the y-axis of the button 53, the protective element 54 is in a disengaged state, thus removing the obstruction to the movement of the button 53. This allows the cutter head 51 to move freely along the cutting channel 54 to cut the seam 3. When cutting is desired, the operator can, for example, pull the protective element 54 out of the base 1, thereby switching the protective element 54 to the disengaged state before proceeding with the cutting.

[0057] Please refer to Figure 10 In another embodiment, the outer peripheral wall of the knob 2 and / or the cavity wall of the knob receiving cavity 12 have a concave-convex structure 6. The concave-convex structure 6 is, for example, a wavy ridge. The concave-convex structure 6 effectively tightens the stitch 3, improving the compression effect on the stitch 3, and also increases the stretching distance of the stitch 3 for the same outer diameter of the knob 2. Of course, in other embodiments, the outer peripheral wall of the knob 2 and / or the cavity wall of the knob receiving cavity 12 can also be cylindrical, i.e., have smooth walls, to simplify the design.

[0058] In summary, the vascular closure device provided by this utility model includes: a base and a knob; the base has a first suture channel arranged along a first direction and a knob receiving cavity arranged along a second direction, the first suture channel penetrating and communicating with the knob receiving cavity; the knob has a second suture channel, the knob is rotatably disposed in the knob receiving cavity about a rotation axis extending along the second direction, and there is a gap between the knob and the cavity wall of the knob receiving cavity; when the knob is in the initial position, the second suture channel is aligned with the first suture channel, allowing the suture to move through the aligned first suture channel and the second suture channel; when the knob is configured to rotate from the initial position to the locked position, it causes the suture in the second suture channel to misalign with the suture in the first suture channel, thereby pulling the suture into the gap to form a pull on the suture; the base is configured to compress the target tissue under the pull of the suture. With this configuration, after the suture is inserted into the first and second suture channels, rotating the knob can pull the suture in and out. This pulling of the suture causes the substrate to press down, creating pressure on the target tissue. The entire device is simple in structure, low in cost, very convenient to use and operate, and highly safe.

[0059] It should be noted that the above embodiments can be combined with each other. The above description is only a description of preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the present utility model.

Claims

1. A vascular closure device, characterized in that, include: Base and knob; The substrate has a first suture channel arranged along a first direction and a knob receiving cavity arranged along a second direction, the first suture channel passing through and communicating with the knob receiving cavity; the knob has a second suture channel, the knob is rotatably disposed in the knob receiving cavity about a rotation axis extending along the second direction, and there is a gap between the knob and the cavity wall of the knob receiving cavity; When the knob is in the initial position, the second suture channel is aligned with the first suture channel, allowing the suture to move through the aligned first and second suture channels. When the knob is configured to rotate from the initial position to the locked position, it causes the suture in the second suture channel to be misaligned with the suture in the first suture channel, thereby pulling the suture into the gap to form a pull on the suture. The matrix is ​​configured to compress the target tissue under the tension of the suture.

2. The vascular closure device according to claim 1, characterized in that, The vascular closure device also includes a cutting component; The substrate has a cutting channel arranged in a third direction, the cutting channel intersecting with the first suture channel; The cutting assembly includes a blade head that is movably disposed in the cutting channel for cutting the suture thread passing through the first suture channel.

3. The vascular closure device according to claim 2, characterized in that, The first suture channel has a first end and a second end in the extension width range along the second direction; the blade head at least covers the first end and at most does not exceed the second end in the extension width range along the second direction; the first suture channel is divided into a first segment and a second segment by the knob receiving cavity, wherein the first segment is a segment close to the substrate for abutting against the target tissue, and the cutting channel intersects with the first segment.

4. The vascular closure device according to claim 3, characterized in that, The substrate has a cutting range marking, which corresponds to the extension width range of the cutter head along the second direction.

5. The vascular closure device according to claim 2, characterized in that, The cutting assembly also includes a protective element that switches between a protected state and a deactivated state; when the protective element is in the protected state, it prevents the cutter head from moving in the cutting channel; when the protective element is in the deactivated state, it releases the restriction on the cutter head, allowing the cutter head to move in the cutting channel.

6. The vascular closure device according to claim 2, characterized in that, The cutting assembly also includes a potential energy element, and the cutter head is configured to be located outside the first suture channel under the potential energy of the potential energy element when it is not subjected to external force.

7. The vascular closure device according to claim 1, characterized in that, Both the first suture channel and the second suture channel are grooves with openings along the second direction.

8. The vascular closure device according to claim 1, characterized in that, The outer peripheral wall of the knob and / or the cavity wall of the knob receiving cavity have an uneven structure; or, the outer peripheral wall of the knob and / or the cavity wall of the knob receiving cavity are cylindrical in shape.

9. The vascular closure device according to claim 1, characterized in that, The gap is no larger than the outer diameter of the suture, so that the suture deforms when it is pulled into the gap.

10. The vascular closure device according to claim 1, characterized in that, The vascular closure device also includes a suture, one end or a folded end of which is used to suture and fix to the target tissue, and the other end or a free end of which is used to pass through the first suture channel and the second suture channel.

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