Vascular closure device

Abstract

The invention provides a blood vessel closing device. The blood vessel closing device comprises a base body and a rotary 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] The present invention relates to the technical field of medical devices, and in particular to a blood vessel closing device. Background Art

[0002] Vascular interventional surgery is currently widely used in the treatment of cardiovascular and cerebrovascular diseases, structural heart disease, peripheral vascular disease and electrophysiological diseases. It has developed rapidly due to its advantages of being minimally invasive, time-saving, safe and efficient. With the development of medical devices, more and more types of vascular diseases tend to use minimally invasive surgical interventions. In order to reduce the pain of patients, some surgical procedures such as valve replacement and pacemaker implantation have been converted into interventional surgeries. As a result, the complexity of interventional surgery has gradually increased. In order to meet the use of complex instruments, the vascular opening has gradually become larger to a maximum of 30Fr. Vascular openings of this size cannot be stopped by conventional bandaging and compression, and compression after suturing is required to effectively complete postoperative vascular closure.

[0003] Current means of vascular closure, such as suture suturing and tourniquet, can effectively stop bleeding, but patients need to maintain a fixed position for a long time, usually 6-8 hours, and medical staff need to frequently relieve pressure to reduce the risk of ischemia. Currently, some suture-type vascular closure devices or implant-type vascular closure devices are also used, which also have defects such as high cost, fixed size, and high probability of complications. Summary of the invention

[0004] The object of the present invention is to provide a blood vessel closure device to solve the problems of low safety and comfort of existing blood vessel closure.

[0005] In order to solve the above technical problems, the present invention provides a blood vessel closing device, which comprises: a base and a knob; The base body has a first suture channel arranged along a first direction and a knob accommodating cavity arranged along a second direction, the first suture channel penetrates and communicates with the knob accommodating cavity; the knob has a second suture channel, the knob is rotatably arranged in the knob accommodating cavity around a rotation axis extending along the second direction, and a gap is formed between the knob and a cavity wall of the knob accommodating cavity; When the knob is in the initial position, the second suture channel is aligned with the first suture channel, allowing the suture to be movably inserted into the aligned first suture channel and the second suture channel; The knob is configured to drive the suture in the second suture channel to be misaligned with the suture in the first suture channel when rotating from the initial position to the locking position, thereby pulling the suture into the gap to form a retraction of the suture; The base is configured to compress the target tissue under the pulling action of the suture.

[0006] Optionally, the blood vessel closing device further comprises a cutting assembly; The base body has a cutting channel arranged along a third direction, and the cutting channel intersects with the first suture channel; The cutting assembly includes a cutter head, which is movably arranged in the cutting channel and is used for cutting the suture passing through the first suture channel.

[0007] Optionally, the first suture channel has a first end and a second end in an extension width range along the second direction; the cutting head has an extension width range along the second direction covering at least the first end and not exceeding the second end at most; the first suture channel is divided into a first section and a second section by the knob accommodating cavity, wherein the first section is a section close to the base for abutting against the target tissue, and the cutting channel intersects with the first section.

[0008] Optionally, a cutting range mark is provided on the base, and the cutting range mark corresponds to an extension width range of the cutting head along the second direction.

[0009] Optionally, the cutting assembly further includes a protective member, which switches between a protective state and a released state; when the protective member is in the protective state, the cutter head is prevented from moving in the cutting channel; when the protective member is in the released state, the restriction on the cutter head is released to allow the cutter head to move in the cutting channel.

[0010] Optionally, the cutting assembly further comprises a potential energy member, and the cutting head is configured to be located outside the first suture channel under the action of the potential energy of the potential energy member when no external force is applied.

[0011] Optionally, both the first suture channel and the second suture channel are grooves having openings along the second direction.

[0012] Optionally, the outer peripheral wall of the knob and / or the cavity wall of the knob accommodating cavity has a concave-convex structure; or, the outer peripheral wall of the knob and / or the cavity wall of the knob accommodating cavity is cylindrical in shape.

[0013] Optionally, the gap is not larger than the outer diameter of the suture, so that the suture is deformed when being pulled into the gap.

[0014] Optionally, the blood vessel closing device further comprises a suture, one end or the folded end of the suture is used for suturing and fixing to the target tissue, and the other end or the free end of the suture is used for passing through the first suture channel and the second suture channel.

[0015] In summary, the blood vessel closing device provided by the present invention comprises: a base and a knob; the base has a first suture channel arranged along a first direction and a knob accommodating cavity arranged along a second direction, the first suture channel penetrates and communicates with the knob accommodating cavity; the knob has a second suture channel, the knob is rotatably arranged in the knob accommodating cavity around a rotation axis extending along the second direction, and a gap is provided between the knob and the cavity wall of the knob accommodating cavity; when the knob is in an initial position, the second suture channel is aligned with the first suture channel, allowing the suture to be movably passed through the aligned first suture channel and the second suture channel; when the knob is configured to rotate from the initial position to the locking position, the suture in the second suture channel is driven to be misaligned with the suture in the first suture channel, thereby pulling the suture into the gap to form a retraction of the suture; the base is configured to compress the target tissue under the retraction of the suture.

[0016] With such configuration, after the suture is passed through the first suture channel and the second suture channel, the suture can be retracted by turning the knob, and the retraction of the suture causes the base to be pressed down to form compression on the target tissue. The entire device has a simple structure and low cost, is very convenient to use and operate, and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Those skilled in the art will appreciate that the drawings are provided for a better understanding of the present invention, but do not constitute any limitation on the scope of the present invention.

[0018] Figure 1 Schematic diagram of a blood vessel closing device according to an embodiment of the present invention.

[0019] Figure 2 Schematic diagram of a suture and a target tissue according to an embodiment of the present invention.

[0020] Figure 3 Schematic diagram of a knob in an initial position according to an embodiment of the present invention.

[0021] Figure 4 Schematic diagram of a knob in a locked position according to an embodiment of the present invention.

[0022] Figure 5 It is a schematic diagram of the suture being pulled and extended according to an embodiment of the present invention.

[0023] Figure 6 It is a schematic diagram of the relative relationship between the cutting channel and the first suture channel of an embodiment of the present invention.

[0024] Figure 7 Schematic diagram of a cutting assembly according to an embodiment of the present invention.

[0025] Figure 8 and Fig. 9 Schematic diagram of a protective member according to an embodiment of the present invention.

[0026] Fig.10 FIG. 4 is a schematic diagram of a blood vessel closing device according to another embodiment of the present invention.

[0027] In the accompanying drawings: 1-base; 11-first suture channel; 111-first end; 112-second end; 113-first section; 114-second section; 12-knob accommodating 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-knife head; 52-potential energy part; 53-button; 54-protective part; 6-concave-convex structure. DETAILED DESCRIPTION

[0028] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with 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 conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0029] As used in the present invention, the singular forms "one", "an", "one" and "the" include plural objects, the term "or" is generally used in a sense that includes "and / or", the term "several" is generally used in a sense that includes "at least one", and the term "at least two" is generally used in a sense that includes "two or more". In addition, the terms "first", "second" and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, and "one end" and "the other end" and "proximal end" and "distal end" generally refer to two corresponding parts, which include not only the endpoints. The terms "proximal end" and "distal end" are defined herein relative to an implant device having an end for intervening in the human body and a manipulation end extending out of the body. The term "proximal end" refers to a position closer to the manipulation end of the implant device extending out of the body, and the term "distal end" refers to a position closer to the end of the implant device intervening in the human body and therefore farther away from the manipulation end of the implant device. Optionally, in the application scenario of manual or hand operation, the terms "proximal end" and "distal end" are defined in this article relative to an operator such as a surgeon or clinician. The term "proximal end" refers to a position closer to the operator, and the term "distal end" refers to a position closer to the implant device and therefore farther away from the operator. In addition, as used in the present invention, "installed", "connected", "connected", an element "set" to another element should be understood in a broad sense, usually only indicating that there is a connection, coupling, matching or transmission relationship between the two elements, and the two elements can be directly or indirectly connected, coupled, matched or transmitted through an intermediate element, and cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, an element can be in any orientation such as the inside, outside, above, below or one side of another element, unless the content is otherwise clearly pointed out. For those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances. In addition, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used relative to the exemplary embodiments as shown in the figures, with the upward or upper direction toward the top of the corresponding figure, and the downward or lower direction toward the bottom of the corresponding figure.

[0030] The object of the present invention is to provide a blood vessel closure device to solve the problem of low safety and comfort of existing blood vessel closure.

[0031] Please refer to Figures 1 to 10The embodiment of the present invention provides a blood vessel closing device, which includes: a base 1 and a knob 2; the base 1 has a first suture channel 11 arranged along a first direction and a knob accommodating cavity 12 arranged along a second direction, the first suture channel 11 penetrates and communicates with the knob accommodating cavity 12; the knob 2 has a second suture channel 21, the knob 2 is rotatably arranged in the knob accommodating cavity 12 around a rotation axis extending along the second direction, and there is a gap between the knob 2 and the cavity wall of the knob accommodating cavity 12; when the knob 2 is in an initial position When the knob 2 is configured to rotate from the initial position to the locked position, the suture 3 in the second suture channel 21 is misaligned with the suture 3 in the first suture channel 11, thereby pulling the suture 3 into the gap to form a retraction of the suture 3; the base 1 is configured to compress the target tissue 4 under the retraction action of the suture 3.

[0032] Please refer to Figure 2 , which shows an application scenario of the blood vessel closure device provided by this embodiment, the folded end of the suture 3 is used to suture and fix to the target tissue 4. The target tissue 4 includes human tissue such as blood vessels 41, and the two ends of the suture 3 pass through the target tissue 4 to form two free ends. In practical applications, the two ends of the suture 3 can be pulled and the target tissue 4 can be compressed at the same time. The blood vessel closure device provided by this embodiment can achieve this effect. Of course Figure 2 What is shown is only an exemplary application scenario and not a limitation on the suturing method of the suture 3. In some other embodiments, the suture 3 may also be fixed at one end, that is, one end of the suture 3 is used for suturing and fixing to the target tissue 4, for example, by fixing by knotting, and the other end of the suture 3 passes through the target tissue 4. At this time, the suture 3 passing through the target tissue 4 is retracted, and the effect of blood vessel closure can also be achieved by combining the compression of the target tissue 4. It can be understood that the suture 3 inserted into the first suture channel 11 and the second suture channel 21 can be single-strand or double-strand. In some complex application scenarios, the suture 3 inserted into the first suture channel 11 and the second suture channel 21 can also be multi-strand, which is not limited in this embodiment.

[0033] In an alternative exemplary embodiment, the first direction and the second direction are perpendicular to each other, and the first direction is the z-axis and the second direction is the x-axis. Optionally, the base 1 has a pressing patch 14 on the side facing the target tissue 4, and the pressing patch 14 is used to abut against the surface (such as skin) of the target tissue 4 to achieve compression of the target tissue 4. Optionally, the knob 2 has a handle 22 to facilitate force application and operation.

[0034] The first suture channel 11 is opened along the z-axis direction, and can be a hole, cavity or groove that penetrates the base 1, and its cross-sectional size is larger than the outer diameter of the suture 3 (or larger than the sum of the cross-sectional sizes of several strands of suture 3) to facilitate the insertion of the suture 3. The knob accommodating cavity 12 is opened along the x-axis direction on the base 1, and the knob 2 can be arranged in the knob accommodating cavity 12 along the x-axis direction, and the knob 2 can rotate around the rotation axis extending along the x-axis direction in the initial position (such as Figure 3 as shown) and locked position (as Figure 4 as shown).

[0035] It should be noted that the first direction and the second direction are not limited to being straight directions. In other embodiments, the first direction or the second direction may also be a direction with a certain curvature or bend. Thus, the first suture channel 11 or the second suture channel 21 is not limited to extending along a straight line. It may also present a certain arc or bend shape, which will not affect the insertion and traction of the suture 3. The first direction and the second direction are not limited to being perpendicular to each other. As long as they can form an angle, they can be achieved.

[0036] Please refer to Figure 3 , when the knob 2 is in the initial position, the second suture channel 21 is aligned with the first suture channel 11, and the suture 3 can be movably inserted in the aligned first suture channel 11 and the second suture channel 21. It should be understood that the alignment of the second suture channel 21 with the first suture channel 11 here does not narrowly limit the second suture channel 21 and the first suture channel 11 to be strictly coaxial or identical, and the cross-sectional shape or size of the second suture channel 21 and the first suture channel 11 may be different. The alignment of the second suture channel 21 with the first suture channel 11 means that the two ends of the second suture channel 21 along the z-axis direction have an overlapping area with the first suture channel 11 that is not less than the area through which the suture 3 can pass. In this way, the suture 3 can be movably inserted.

[0037] Please refer to Figure 4 , the knob 2 reaches the locked position after rotating a certain angle around the rotation axis extending along the x-axis direction. Figure 2 , one end of the suture 3 at the target tissue 4 (the folded end in some application scenarios) is equivalent to being fixed, and the end of the suture 3 away from the target tissue 4 (the free end in some application scenarios) is preferably straightened after passing through the first suture channel 11 and the second suture channel 21 to reduce the looseness, and then the knob 2 is turned, the suture 3 in the second suture channel 21 and the suture 3 in the first suture channel 11 will be misaligned, and the suture 3 will be pulled into the gap between the knob 2 and the cavity wall of the knob accommodating cavity 12. At this time, if a part of the suture 3 forms a fixed relationship with the base 1, the base 1 will compress the target tissue 4 under the pulling action of the suture 3.

[0038] In one embodiment, the gap between the knob 2 and the wall of the knob accommodating cavity 12 is not larger than the outer diameter of the suture 3, so that the suture 3 is deformed when it is pulled into the gap. At this time, the portion of the suture 3 in the gap is equivalent to forming a fixed relationship with the base 1, the original length of the suture 3 is stretched, and the suture is tightened, causing the entire device to be pressed down. At the same time, the knob 2 is also limited by the reaction force of the extrusion deformation of the suture 3, that is, the rotation of the knob 2 is limited to the locked position.

[0039] Please refer to Figure 5 In the process of rotating the knob 2 from the initial position to the locking position, the total length L of the suture 3 changes from L1+L2+L3 to L1+L2+L3+L4+L5, and the length of the suture 3 is stretched, part of which is the extension of the suture 3 material itself, and the other part is the tightening of the suture 3 in the target tissue 4. While the suture 3 is tightened, the pressing patch 14 of the base 1 contacts and abuts against the surface of the target tissue 4 (such as skin), which provides a compressive force on the blood vessel opening of the target tissue 4, thereby achieving compression hemostasis.

[0040] Optionally, the gap does not have to be smaller than the outer diameter of the suture 3. In some embodiments, the suture 3 can also be fixed to the base 1. For example, after passing through the first suture channel 11, the end of the suture 3 away from the target tissue 4 can be fixed to the base 1 by coiling or knotting. In this case, the fixation is not limited to relying on the deformation of the suture 3 in the gap. Of course, an additional rotation-limiting structure can be set for the knob 2 to limit the rotation of the knob 2 to the locked position, so as to maintain the pressure on the target tissue 4 for a period of time.

[0041] In an exemplary embodiment, the outer diameter of the knob 2 must be within the tensile range that the suture 3 can withstand. For large-caliber blood vessel openings, the maximum can reach about 1 cm. The compression 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, and a compressive force of about 80 N is required. Taking the suture 3 used for vascular suture as No. 0 line as an example, its tensile strength is usually about 60 N, and the two strands of suture 3 together are about 120 N. When each strand of suture 3 is at the position corresponding to the compressive force of 40 N, the displacement of the suture 3 is about 1 cm. When the skin of the target tissue 4 may be pressed down by 1 cm, the corresponding displacement is reflected on the outer diameter of the knob 2. The outer diameter of the knob 2 can be configured within 1.5 cm, and the maximum rotation angle of the knob 2 from the initial position to the locked position is about 210 degrees, that is, the displacement of the suture 3 is within 3 cm.

[0042] Preferably, the first suture channel 11 and the second suture channel 21 are both grooves with openings along the second direction. In application, in order 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 toward the second direction, so that the suture 3 can enter the first suture channel 11 and the second suture channel 21 laterally along the opening in the second direction, which is convenient for operation.

[0043] Please refer to Figure 6 and Figure 7 Preferably, the vascular closure device further comprises a cutting assembly 5; the base body 1 has a cutting channel 13 arranged along a third direction, and the cutting channel 13 intersects with the first suture channel 11; the cutting assembly 5 comprises a cutting head 51, and the cutting head 51 is movably arranged in the cutting channel 13, and is used for cutting the suture 3 passing through the first suture channel 11.

[0044] The third direction is a direction that is at an angle to both the first direction and the second direction. In an exemplary embodiment, the third direction is perpendicular to both the first direction and the second direction. Taking the third direction as the y-axis as an example, the cutter head 51 can move along the y-axis. After the knob 2 is rotated to the locked position and the pressure on the target tissue 4 is maintained for a period of time, the blood vessel is basically closed. At this time, the suture 3 can be cut by moving the cutter head 51 in the direction of the first suture channel 11. After the suture 3 is cut, the entire vascular closure device can be removed. It should be understood that the third direction is not limited to a straight line direction. In other embodiments, the third direction can also be a direction with a certain arc or bend. Therefore, the cutting channel 13 is not limited to extending in a straight line. It can also present a certain arc or bend shape, which will not affect the movement of the cutter head 51 and the cutting of the suture 3. The third direction is not limited to being perpendicular to the first direction or the second direction. As long as the third direction can form an angle with the first direction or the second direction, it can be achieved.

[0045] Optionally, the first suture channel 11 has a first end 111 and a second end 112 along the second direction; the extension width of the blade head 51 along the second direction at least covers the first end 111 and does not exceed the second end 112 at most. In order 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 extension width of the blade head 51 along the second direction at least covers the first end 111, it can be understood that the suture 3 can be reliably cut when it is as close to the first end 111 as possible along the x-axis direction. In an alternative exemplary embodiment, the extension width of the blade head 51 along the second direction exceeds 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 and ensure the reliability of cutting.

[0046] On the other hand, the extension width range of the cutter head 51 along the second direction does not exceed the second end 112 at most, which can ensure that the cutter head 51 will not extend out of the first suture channel 11 during cutting, avoiding danger. In one embodiment, the extension width range of the cutter head 51 along the second direction can be at a certain distance relative to the second end 112 to reduce the risk of misoperation of the cutting assembly 5. The suture 3 cannot be cut at all width positions in the first suture channel 11 along the x-axis direction, but can only be cut in some areas. Preferably, the area of ​​the first suture channel 11 that can be cut along the x-axis direction is not less than 5 mm to ensure normal use. Optionally, a cutting range mark is provided on the substrate 1, and the cutting range mark corresponds to the extension width range of the cutter head 51 along the second direction.

[0047] Preferably, the first suture channel 11 is divided into a first section 113 and a second section 114 by the knob accommodating cavity 12, wherein the first section 113 is a section close to the base 1 for abutting against the target tissue 4, and the cutting channel 13 intersects with the first section 113. The cutting channel 13 intersects with the first section 113, that is, the position where the suture 3 is cut is located in the first section 113, that is, the section close to the target tissue 4. With such a configuration, the section of the suture 3 squeezed and 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 avoid the risk of blockage in the tissue caused by the squeezed and deformed section of the suture 3. At the same time, the cutting position of the suture 3 conforms to clinical usage habits.

[0048] Optionally, the cutting assembly 5 further includes a potential energy member 52, and the cutter head 51 is configured to be located outside the first suture channel 11 under the potential energy of the potential energy member 52 when no external force is applied. The provision of the potential energy member 52 effectively improves the reliability of the cutting assembly 5 and reduces the possibility of erroneous cutting caused by false triggering. The potential energy member 52 may include an elastic potential energy member (such as a spring) or a magnetic potential energy member (such as a group of magnets with opposite poles), etc., which may, for example, apply an elastic force or a magnetic force to the cutter head 51 in a direction away from the first suture channel 11, so that the cutter head 51 is located away from the first suture channel 11 when not pressed.

[0049] In an alternative exemplary embodiment, the cutting assembly 5 further includes a button 53, which can be fixedly connected to the cutter head 51, and the potential energy member 52 includes a spring, and the two ends of the spring are respectively connected to the button 53 and the base 1. When performing cutting, the operator presses the button 53 to drive the cutter head 51 to move along the y-axis. At this time, the spring is compressed to store potential energy. After the cutter head 51 enters the first suture channel 11 to cut the suture 3, the operator releases the button 53, and the spring releases the potential energy, driving the cutter head 51 to return to a position away from the first suture channel 11.

[0050] For further information, please refer to Figure 8 and Fig. 9 , the cutting assembly 5 further includes a protective member 54, which switches between a protective state and a release state; when the protective member 54 is in the protective state, the cutter head 51 is prevented from moving in the cutting channel 13; when the protective member 54 is in the release state, the restriction on the cutter head 51 is released to allow the cutter head 51 to move in the cutting channel 54. In an exemplary embodiment, the protective member 54 is movably inserted in the base 1 along the z-axis or the x-axis, and is in a protective state when it moves along the z-axis or the x-axis to overlap with the y-direction position of the button 53. At this time, the movement of the button 53 along the y-axis is blocked by the protective member 54 and cannot be pressed, so that the cutter head 51 is equivalent to being limited and cannot move along the cutting channel 54 to cut the suture 3. Avoid accidental touch when cutting is not desired, and protect the suture 3. When the protective member 54 moves along the z-axis or x-axis to be offset from the y-axis position of the button 53, the protective member 54 is in a released state, which removes the obstruction to the movement of the button 53, so that the cutter head 51 can move freely along the cutting channel 54 to cut the suture 3. When it is desired to cut, the operator can, for example, pull the protective member 54 out of the base 1, thereby switching the protective member 54 to the released state, and then cut.

[0051] Please refer to Fig.10 In another embodiment, the outer peripheral wall of the knob 2 and / or the cavity wall of the knob accommodating cavity 12 have a concave-convex structure 6. The concave-convex structure 6 is, for example, a wavy edge. The setting of the concave-convex structure 6 can, on the one hand, effectively tighten the suture 3 and improve the squeezing effect on the suture 3, and on the other hand, increase the stretching distance of the suture 3 under the same outer diameter of the knob 2. Of course, in some other embodiments, the outer peripheral wall of the knob 2 and / or the cavity wall of the knob accommodating cavity 12 can also be cylindrical, that is, a smooth wall surface, to simplify the design.

[0052] In summary, the blood vessel closing device provided by the present invention comprises: a base and a knob; the base has a first suture channel arranged along a first direction and a knob accommodating cavity arranged along a second direction, the first suture channel penetrates and communicates with the knob accommodating cavity; the knob has a second suture channel, the knob is rotatably arranged in the knob accommodating cavity around a rotation axis extending along the second direction, and a gap is provided between the knob and the cavity wall of the knob accommodating cavity; when the knob is in an initial position, the second suture channel is aligned with the first suture channel, allowing the suture to be movably passed through the aligned first suture channel and the second suture channel; when the knob is configured to rotate from the initial position to the locking position, the suture in the second suture channel is driven to be misaligned with the suture in the first suture channel, thereby pulling the suture into the gap to form a retraction of the suture; the base is configured to compress the target tissue under the retraction of the suture. With such configuration, after the suture is passed through the first suture channel and the second suture channel, the suture can be retracted by turning the knob, and the retraction of the suture causes the base to be pressed down to form compression on the target tissue. The entire device has a simple structure and low cost, is very convenient to use and operate, and has high safety.

[0053] It should be noted that the above embodiments can be combined with each other. The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure are within the protection scope of the present invention.

Claims

1. A blood vessel closing device, characterized in that: include: base and knob; The base body has a first suture channel arranged along a first direction and a knob accommodating cavity arranged along a second direction, the first suture channel penetrates and communicates with the knob accommodating cavity; the knob has a second suture channel, the knob is rotatably arranged in the knob accommodating cavity around a rotation axis extending along the second direction, and a gap is formed between the knob and a cavity wall of the knob accommodating cavity; When the knob is in the initial position, the second suture channel is aligned with the first suture channel, allowing the suture to be movably inserted into the aligned first suture channel and the second suture channel; The knob is configured to drive the suture in the second suture channel to be misaligned with the suture in the first suture channel when rotating from the initial position to the locking position, thereby pulling the suture into the gap to form a retraction of the suture; The base is configured to compress the target tissue under the pulling action of the suture.

2. The blood vessel closing device according to claim 1, characterized in that: The blood vessel closure device further includes a cutting assembly; The base body has a cutting channel arranged along a third direction, and the cutting channel intersects with the first suture channel; The cutting assembly includes a cutter head, which is movably arranged in the cutting channel and is used for cutting the suture passing through the first suture channel.

3. The blood vessel closing device according to claim 2, characterized in that: The extension width range of the first suture channel along the second direction has a first end and a second end; the extension width range of the cutting head along the second direction covers at least the first end and does not exceed the second end at most; the first suture channel is divided into a first section and a second section by the knob accommodating cavity, wherein the first section is a section close to the base for abutting against the target tissue, and the cutting channel intersects with the first section.

4. The blood vessel closing device according to claim 3, characterized in that: The base body has a cutting range mark, and the cutting range mark corresponds to the extension width range of the cutter head along the second direction.

5. The blood vessel closing device according to claim 2, characterized in that: The cutting assembly also includes a protective member, which switches between a protective state and a released state; when the protective member is in the protective state, the cutter head is prevented from moving in the cutting channel; when the protective member is in the released state, the restriction on the cutter head is released to allow the cutter head to move in the cutting channel.

6. The blood vessel closing device according to claim 2, characterized in that: The cutting assembly further comprises a potential energy member, and the cutting head is configured to be located outside the first suture channel under the action of the potential energy of the potential energy member when no external force is applied.

7. The blood vessel closing device according to claim 1, characterized in that: The first suture channel and the second suture channel are both grooves having an opening along the second direction.

8. The blood vessel closing device according to claim 1, characterized in that: The outer peripheral wall of the knob and / or the cavity wall of the knob accommodating cavity has a concave-convex structure; or the outer peripheral wall of the knob and / or the cavity wall of the knob accommodating cavity is cylindrical in shape.

9. The blood vessel closing device according to claim 1, characterized in that: The gap is not larger than the outer diameter of the suture, so that the suture is deformed when being pulled into the gap.

10. The blood vessel closing device according to claim 1, characterized in that: The blood vessel closing device further comprises a suture, one end or the folded end of the suture is used for suturing and fixing to the target tissue, and the other end or the free end of the suture is used for passing through the first suture channel and the second suture channel.

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