Ventricular connection mechanism and ventricular assist system

Abstract

The present application relates to a ventricular connection mechanism and a ventricular assist system. The ventricular connection mechanism includes a sewing ring and a clamping assembly. The sewing ring is provided with a receiving hole for the inlet tube of the ventricular assist device to extend into, and a first annular groove surrounding the receiving hole is provided on the sewing ring to separate the sewing ring into a sealing portion surrounding the receiving hole and a sewing portion surrounding the first annular groove; the clamping assembly includes a clamping ring, at least part of the clamping ring is embedded in the first annular groove, and the clamping ring is sleeved on the sealing portion, the clamping ring clamps the inlet tube through the sealing portion, and the inner diameter of the clamping ring is adjustable to adjust the tightness of the sealing portion clamping the inlet tube. The above-mentioned ventricular connection mechanism can adjust the sealing fit between the sealing portion and the inlet tube through the clamping ring, thereby achieving 360° sealing of the inlet tube along the circumferential direction, avoiding the occurrence of a gap between the sealing portion and the inlet tube, and reducing the chance of blood leakage.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to a ventricular connection mechanism and a ventricular assist system. Background Art

[0002] Ventricular assist devices (VADs) assist the heart in pumping blood and are commonly used in the treatment of cardiovascular disease. During VAD implantation, a ventricular attachment mechanism is typically used to suture the VAD to the heart tissue. However, conventional VADs are prone to blood leakage after blood pump installation, requiring improvement. Summary of the Invention

[0003] Based on this, it is necessary to provide a ventricular connection mechanism and a ventricular assist system to reduce the problem of blood leakage.

[0004] In a first aspect, the present application provides a ventricular connection mechanism, comprising:

[0005] a sewing ring, the sewing ring being provided with a receiving hole for the inlet tube of the ventricular assist device to extend therethrough, the sewing ring being provided with a first annular groove surrounding the receiving hole to separate the sewing ring into a sealing portion surrounding the receiving hole and a sewing portion surrounding the first annular groove; and

[0006] The clamping assembly includes a clamping ring, at least a portion of which is embedded in the first annular groove, and the clamping ring is sleeved on the sealing portion. The clamping ring clamps the inlet pipe through the sealing portion, and the inner diameter of the clamping ring is adjustable to adjust the tightness of the sealing portion clamping the inlet pipe.

[0007] The technical solution is further described below:

[0008] In one embodiment, the suture ring has a suture bottom surface and a suture top surface facing away from the suture bottom surface, the suture bottom surface can be fitted with the outer wall of the heart, and the first annular groove is exposed on the suture top surface; the first annular groove has a groove bottom surface, and a first axial distance exists between the groove bottom surface and the suture top surface; the clamping ring has a ring top surface facing away from the groove bottom surface, and a second axial distance exists between the ring top surface and the groove bottom surface, and the second axial distance is less than or equal to the first axial distance.

[0009] In one embodiment, the sewing ring is further provided with a second annular groove, and the first annular groove and the second annular groove are provided on opposite sides of the sewing ring, and the first annular groove and the second annular groove correspond to and are spaced apart along the axial direction of the sewing ring.

[0010] In one embodiment, the depth of the second annular groove is d, and the minimum distance between the bottom surface of the first annular groove and the bottom surface of the second annular groove is t, wherein: 0.2≤d / t≤0.4.

[0011] In one embodiment, the outer peripheral surface of the sealing portion is provided with a first flange extending radially outward along the sealing portion, and a first slot is formed between the first flange and the bottom surface of the first annular groove; the inner periphery of the clamping ring is provided with a first step, and the first step is inserted and matched with the first slot.

[0012] In one embodiment, the ventricular connection mechanism further comprises a fixing ring comprising a ring body and a cam; wherein the ring body is fixed to the sewing ring and surrounds the clamping ring; the cam protrudes from the ring body for clamping.

[0013] In one embodiment, the suture ring has a suture bottom surface and a suture top surface facing away from the suture bottom surface, the suture bottom surface can fit against the outer wall of the heart, and the first annular groove is exposed on the suture top surface; the ring body of the fixing ring and the clamping ring are both installed in the first annular groove.

[0014] In one embodiment, the outer peripheral surface of the sealing portion is provided with a first flange extending radially outward along the sealing portion, and a first slot is formed between the first flange and the bottom surface of the first annular groove; the inner periphery of the clamping ring is provided with a first step, and the first step is inserted and matched with the first slot.

[0015] In one embodiment, the first annular groove further has a groove side surface located on one side of the groove bottom surface and facing the sealing portion; the outer periphery of the clamping ring is provided with a second flange extending toward the groove side surface, and the second flange is spaced from the groove bottom surface of the first annular groove and forms a second slot; the ring body of the fixing ring is arranged between the second flange and the groove side surface, and the inner periphery of the ring body is further provided with a second step, and the second step is inserted into and matched with the second slot.

[0016] In one embodiment, the clamping ring has a connecting portion connecting the first step and the second flange; the second step includes a step surface facing away from the bottom surface of the groove, a step side surface facing away from the side surface of the groove, and a chamfered surface connecting the step surface and the step side surface, and the angles between the chamfered surface and the step surface and the step side surface are all greater than 90°; the height of the chamfered surface along the axial direction of the fixing ring is greater than the height of the step side surface along the axial direction of the fixing ring to avoid the connecting portion.

[0017] In one embodiment, the clamping ring has an opening opened along the circumference of the clamping ring, and the sealing portion is provided with a notch corresponding to the position of the opening. The notch is arranged on the side of the sealing portion facing away from the accommodating hole, so that the sealing portion at the notch can be deformed toward the accommodating hole when the inner diameter of the clamping ring is reduced.

[0018] In one embodiment, the clamping assembly further includes two connecting arms connected to the clamping ring, and the two connecting arms can selectively move closer or farther away from each other to adjust the inner diameter of the clamping ring; the suture portion is provided with a first avoidance groove on the side of the first annular groove facing away from the sealing portion, and the first avoidance groove is exposed on the top surface of the suture and is connected to the first annular groove, wherein at least one of the connecting arms can extend into the first avoidance groove along the radial direction of the clamping ring through the first annular groove.

[0019] In one embodiment, the clamping ring has an opening opened along the circumference of the clamping ring; the clamping assembly also includes a first connecting arm and a second connecting arm, and the first connecting arm and the second connecting arm are respectively connected to the opposite ends of the opening; the ventricular connection mechanism also includes a locking assembly, and the locking assembly is connected to both the first connecting arm and the second connecting arm to drive the first connecting arm and the second connecting arm to selectively move closer to or farther away from each other.

[0020] In one embodiment, the ventricular connection mechanism further includes a sewing cloth, and the sewing cloth is covered on the surface of the sewing ring and the clamping ring.

[0021] In a second aspect, the present application further provides a ventricular assist system, which includes a ventricular assist device and the ventricular connection mechanism as described above, wherein the ventricular assist device includes an inlet tube, which is passed through the accommodating hole.

[0022] The aforementioned ventricular connection mechanism and ventricular assist system utilize a receiving hole provided in the sewing ring for the inlet tube of the ventricular assist device to extend therethrough, enabling the inlet tube of the ventricular assist device to be inserted into the sewing ring through the receiving hole. A first annular groove is provided in the sewing ring surrounding the receiving hole to form a sealing portion surrounding the receiving hole. At least a portion of a clamping ring is then embedded in the first annular groove, allowing the clamping ring to be positioned around the outer circumference of the sealing portion. Thus, by adjusting the inner diameter of the clamping ring, the diameter of the receiving hole of the sealing portion can be reduced, thereby adjusting the tightness with which the sealing portion grips the inlet tube, ensuring a tight seal between the sealing portion and the inlet tube, thereby achieving a 360-degree circumferential seal on the inlet tube. This prevents gaps between the sealing portion and the inlet tube and reduces the risk of blood leakage. At least a portion of the clamping ring is embedded in the first annular groove provided on the sewing ring, so that the clamping ring and the sewing ring at least partially overlap along the axial direction of the sewing ring, thereby reducing the thickness of the ventricular connection mechanism at the sewing ring, thereby reducing the height of the ventricular assist device protruding from the outer surface of the heart after the ventricular assist device is installed in the heart, and further reducing the risk of the ventricular assist device contacting other organs in the chest cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only for illustrative purposes and are not necessarily drawn to true scale.

[0026] Figure 1 A schematic structural diagram of the ventricular connection mechanism provided in this application from one perspective.

[0027] Figure 2 for Figure 1 An exploded view of the ventricular connection mechanism is shown in one perspective.

[0028] Figure 3 for Figure 1 Schematic diagram of the structure of the sewing ring of the ventricular connection mechanism shown.

[0029] Figure 4 for Figure 1 A top view of the ventricular connection mechanism is shown.

[0030] Figure 5 for Figure 4 The cross-sectional view of the ventricular connection mechanism along direction II is shown.

[0031] Figure 6 for Figure 5 A partial enlarged view of point A.

[0032] Figure 7 FIG. 1 is a schematic back view of a sewing ring according to an embodiment.

[0033] Figure 8 for Figure 5 Another enlarged view of the part at A.

[0034] Figure 9 for Figure 1 The schematic diagram of the structure of the clamping ring and locking assembly of the ventricular connection mechanism is shown.

[0035] Figure 10 for Figure 1 Schematic diagram of the structure of the fixed ring of the ventricular connection mechanism shown.

[0036] Figure 11 for Figure 1 A cross-sectional view of the ventricular connection mechanism is shown in an exploded state.

[0037] Figure 12 for Figure 6 A partial enlarged view at point B.

[0038] Figure 13 for Figure 1 An exploded view of the ventricular connection mechanism is shown from another perspective.

[0039] Figure 14 for Figure 13 A partial enlarged view at point C.

[0040] Figure 15 for Figure 13 The structure diagram of the ventricular connection mechanism shown in another perspective.

[0041] Description of reference numerals:

[0042] 1. Ventricular connection mechanism; 10. Suture ring; 111. First annular groove; 121. Second annular groove; 13. Accommodation hole; 14. Suture portion; 141. Suture top surface; 142. Suture bottom surface; 143. First avoidance groove; 15. Sealing portion; 151. Notch; 152. First flange; 155. First slot; 20. Clamping assembly; 21. Clamping ring; 211. First end; 212. Second end; 213. Opening; 221. First connecting arm; 2211. First protrusion; 2212. First inclined surface; 222. Second connecting arm; 2221. Second protrusion; 22 22. Second inclined surface; 23. First step; 24. Second flange; 241. Second slot; 25. Connecting portion; 40. Fixed ring; 41. Ring body; 412. Second avoidance groove; 42. Protruding buckle; 421. Main body; 422. Protruding portion; 43. Second step; 431. Step surface; 432. Step side; 433. Beveled surface; 50. Locking assembly; 51. Fixed seat; 511. First groove; 512. Curved surface; 52. Moving seat; 521. Second groove; 53. Locking piece; 531. Engaging portion; G1. First axial spacing; G2. Second axial spacing. DETAILED DESCRIPTION

[0043] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0045] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0046] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0049] During blood pump implantation surgery, a ventricular connection mechanism is typically used to securely mount the blood pump to the heart. Specifically, the ventricular connection mechanism is fixed to the outer wall of the heart, and the blood pump's inlet tube passes through the ventricular connection mechanism and extends into the ventricle, where it is locked securely. The inventors of this application have discovered that with conventional ventricular connection mechanisms, there is a risk of blood leaking from the openings in the annular disk. Furthermore, the thickness of conventional ventricular connection mechanisms increases the risk of contact between the ventricular assist device installed within the ventricular connection mechanism and other organs within the chest cavity.

[0050] In order to improve at least some of the above problems, the present application provides a ventricular connection mechanism and a ventricular assist system. By providing a clamping ring sleeve on the periphery of the sealing portion, the sealing portion can be sealed and fitted with the inlet tube, achieving 360° sealing of the inlet tube along the circumferential direction, thereby reducing the chance of blood leakage. By surrounding the suture portion on the periphery of the sealing portion, the sealing portion and the suture portion at least partially overlap along the axial direction of the suture portion, thereby reducing the thickness of the suture ring along the axial direction of the suture portion, thereby reducing the height of the ventricular assist device protruding from the outer surface of the heart after the heart is installed, thereby reducing the risk of the ventricular assist device contacting other organs in the chest cavity. The ventricular connection mechanism and ventricular assist system provided by the present application are described in detail below in conjunction with specific embodiments and drawings in the specification.

[0051] See also Figures 1 to 4 An embodiment of the present application provides a ventricular connection mechanism 1 for fixing a ventricular assist device to cardiac tissue. The ventricular connection mechanism 1 includes a sewing ring 10 and a clamping assembly 20 .

[0052] The sewing ring 10 is used to be fixed on the heart tissue. Specifically, the sewing ring 10 is provided with a receiving hole 13 for the inlet tube of the ventricular assist device to extend into. The sewing ring 10 is provided with a first annular groove 111 surrounding the receiving hole 13 to separate the sewing ring 10 into a sealing portion 15 surrounding the receiving hole 13 and a sewing portion 14 surrounding the first annular groove 111.

[0053] The clamping assembly 20 includes a clamping ring 21, at least a portion of which is embedded in the first annular groove 111. The clamping ring 21 is sleeved around the outer circumference of the sealing portion 15, and the clamping ring 21 clamps the inlet pipe through the sealing portion 15. The inner diameter of the clamping ring 21 is adjustable, that is, the clamping ring 21 can be radially contracted inward under the action of an external force to adjust its inner diameter, thereby adjusting the tightness with which the sealing portion 15 clamps the inlet pipe. In this embodiment, the clamping ring 21 is completely embedded in the first annular groove 111. In other embodiments, the clamping ring 21 can also be partially located within the first annular groove 111, while the remaining portion is located outside the first annular groove 111 and protrudes from the surface of the sewing ring 10.

[0054] The ventricular connection mechanism 1 is constructed by providing a receiving hole 13 in the sewing ring 10 for the inlet tube of the ventricular assist device to extend therethrough, allowing the inlet tube of the ventricular assist device to be inserted into the sewing ring 10 through the receiving hole 13. A first annular groove 111 is provided in the sewing ring 10 surrounding the receiving hole 13 to form a sealing portion 15 surrounding the receiving hole 13. Furthermore, at least a portion of a clamping ring 21 is embedded in the first annular groove 111, so that the clamping ring 21 is fitted around the outer circumference of the sealing portion 15. Thus, by adjusting the inner diameter of the clamping ring 21, the diameter of the receiving hole 13 of the sealing portion 15 can be reduced, thereby adjusting the tightness with which the sealing portion 15 grips the inlet tube, ensuring a sealing fit between the sealing portion 15 and the inlet tube. This achieves a 360-degree circumferential seal on the inlet tube, preventing any gaps between the sealing portion 15 and the inlet tube and reducing the risk of blood leakage. At least a portion of the clamping ring 21 is embedded in the first annular groove 111 provided on the sewing ring 10, so that the clamping ring 21 and the sewing ring 10 at least partially overlap along the axial direction of the sewing ring 10, thereby reducing the thickness of the ventricular connection mechanism 1 at the sewing ring 10, thereby reducing the height of the ventricular assist device protruding from the outer surface of the heart after the heart is installed, thereby reducing the risk of the ventricular assist device contacting other organs in the chest cavity.

[0055] See also Figure 3 The material of the sewing ring 10 can be a soft gel with good biocompatibility, such as silicone, so that the sewing ring 10 can be easily attached to the heart tissue and the suture thread can be easily passed through the sewing ring 10. Furthermore, the ventricular connection mechanism 1 can also include a sewing cloth (not shown), which is covered on the surface of the sewing ring 10 and the clamping ring 21 to make the sewing ring 10 and the clamping ring 21 more tightly connected. Furthermore, the suture thread passes through the sewing cloth and the suture portion 14 of the sewing ring 10 and is sutured to the heart tissue, thereby fixing the ventricular connection mechanism 1 to the heart tissue. Preferably, the material of the sewing cloth is a textile fabric, such as polyester fabric.

[0056] Please continue reading Figure 1 and Figure 2 The suture portion 14 has a suture top surface 141 and a suture bottom surface 142 facing away from the suture top surface 141, wherein the suture bottom surface 142 is capable of contacting the outer wall of the heart. A first annular groove 111 is exposed on the suture top surface 141. The first annular groove 111 is an annular groove structure and is disposed around the outer circumference of the sealing portion 15. At least a portion of the clamping ring 21 is embedded in the first annular groove 111. This allows the clamping ring 21 to be more tightly coupled to the suture ring 10, reducing the problem of blood leakage caused by a gap between the clamping ring 21 and the suture ring 10 during the suture pulling process.

[0057] See also Figure 5 and Figure 6The first annular groove 111 has a groove bottom surface 1112, and a first axial distance G1 is defined between the groove bottom surface 1112 and the suture top surface 141. The clamping ring 21 has a ring top surface 214 facing away from the groove bottom surface 1112, and a second axial distance G2 is defined between the ring top surface 214 and the groove bottom surface 1112. The second axial distance G2 is less than or equal to the first axial distance G1. That is, the clamping ring 21 will not bulge outward after being installed in the first annular groove 111, so that the thickness of the suture ring 10 is the same as the thickness of the ventricular connection mechanism 1 at the suture ring 10, which further reduces the overall axial height of the suture ring 10 and further reduces the risk of contact between the ventricular assist device and other organs in the chest cavity.

[0058] See also Figure 7 and Figure 8 In one embodiment, the sewing ring 10 further comprises a second annular groove 121. The first annular groove 111 and the second annular groove 121 are disposed on opposite sides of the sewing ring 10, that is, the second annular groove 121 is exposed on the sewing bottom surface 142. The second annular groove 121 is an annular groove structure, and the first annular groove 111 and the second annular groove 121 correspond to and are spaced apart along the axial direction of the sewing ring 10. The axial spacing of the first annular groove 111 and the second annular groove 121 along the sewing ring 10 means that a certain thickness of soft rubber is disposed between the bottom surfaces of the first annular groove 111 and the second annular groove 121. The axial correspondence of the second annular groove 121 with the first annular groove 111 along the sewing ring 10 means that the orthographic projection of the edge of the second annular groove 121 on the sewing top surface 141 lies within the first annular groove 111, or the orthographic projection of the edge of the first annular groove 111 on the sewing bottom surface 142 lies within the second annular groove 121. The orthographic projection refers to the projection along the axial direction of the sewing ring 10.

[0059] By opening a second annular groove 121 corresponding to the position of the first annular groove 111 on the sewing bottom surface 142, the thickness of the sewing ring 10 at the position corresponding to the first annular groove 111 can be reduced, which is beneficial to improving the elastic deformation ability of the sealing part 15, making it easier for the sealing part 15 to retract under the clamping action of the clamping ring 21, facilitating the sealing fit between the sealing part 15 and the inlet pipe, and avoiding the situation where the sealing part 15 cannot retract.

[0060] The depth of the second annular groove 121 is d, and the minimum distance between the bottom surfaces 1112 of the first annular groove 111 and the bottom surfaces 1212 of the second annular groove 121 is t, i.e., the minimum thickness t of the sewing ring 10 at the first annular groove 111, where: 0.2 ≤ d / t ≤ 0.4. This ensures that the connection strength between the sealing portion 15 and the suture portion 14 is maintained while allowing the sealing portion 15 to retract more easily under the clamping action of the clamping ring 21, facilitating medical personnel's operation of the clamping ring 21 to clamp the inlet tube of the ventricular assist device. When d / t < 0.2, the thickness of the sewing ring 10 at the location corresponding to the first annular groove 111 is too thick, hindering the retraction of the sealing portion 15. When d / t > 0.4, the thickness of the sewing ring 10 at the location corresponding to the first annular groove 111 is too thin, easily leading to a break in the connection between the sealing portion 15 and the suture portion 14.

[0061] See also Figure 9 In one embodiment, the clamping assembly 20 further includes two connecting arms connected to the clamping ring 21. The two connecting arms can selectively move closer or farther away from each other to adjust the inner diameter of the clamping ring 21. The clamping ring 21 further includes an opening 213 extending along the circumference of the clamping ring 21, and a first end 211 and a second end 212 forming the opening 213. The first end 211 and the second end 212 are disposed opposite each other along the circumference of the clamping ring 21. In this embodiment, the two connecting arms are a first connecting arm 221 and a second connecting arm 222, wherein the first connecting arm 221 is connected to the first end 211, and the second connecting arm 222 is connected to the second end 212.

[0062] See also Figure 3 and Figure 9 In one embodiment, the suture portion 14 defines a first escape groove 143 on the side of the first annular groove 111 facing away from the sealing portion 15. The first escape groove 143 is exposed on the suture top surface 141 and communicates with the first annular groove 111. At least one of the first connecting arm 221 and the second connecting arm 222 can extend into the first escape groove 143 radially from the clamping ring 21 through the first annular groove 111. In this embodiment, both the first connecting arm 221 and the second connecting arm 222 extend into the first escape groove 143, thereby preventing the first connecting arm 221 and the second connecting arm 222 from contacting the suture portion 14 when the clamping ring 21 retracts, i.e., when the first connecting arm 221 and the second connecting arm 222 approach each other, thereby ensuring that the clamping ring 21 can retract smoothly in the radial direction. In other embodiments, one of the first connecting arm 221 and the second connecting arm 222 extends into the first escape groove 143, while the other can be outside the first escape groove 143.

[0063] See also Figure 3 、 Figure 6 and Figure 8The sealing portion 15 is generally an annular wall structure, the inner circumference of the sealing portion 15 is the hole wall of the accommodating hole 13 , and the outer circumference of the sealing portion 15 is the groove wall of the first annular groove 111 close to the accommodating hole 13 .

[0064] Furthermore, the outer circumference of the sealing portion 15 is provided with a first flange 152 extending radially outward from the sealing portion 15. The first flange 152 is an annular structure, and a first slot 155 is formed between the first flange 152 and the bottom surface 1112 of the first annular groove 111. At least a portion of the clamping ring 21 is disposed in the first slot 155 between the first flange 152 and the bottom surface 1112 of the first annular groove 111. Specifically, the inner circumference of the clamping ring 21 is provided with a first step 23. The first step 23 is an annular structure and protrudes radially inward from the clamping ring 21. The first step 23 is interlocked with the first slot 155, that is, the first step 23 abuts between the first flange 152 and the bottom surface 1112. In this way, the first flange 152 can axially limit the clamping ring 21, thereby strengthening the connection strength between the sewing ring 10 and the clamping ring 21 and preventing the clamping ring 21 from separating from the sewing ring 10 during operation.

[0065] Furthermore, the sealing portion 15 is provided with a notch 151, and the position of the notch 151 corresponds to the position of the opening 213 of the clamping ring 21, wherein the position of the notch 151 corresponds to the position of the opening 213 of the clamping ring 21 means that the width of the notch 151 is greater than the width of the opening 213, and the edge of the opening 213 is located inside the edge of the notch 151 along the radial extension line of the clamping ring 21; or, the width of the opening 213 is greater than the width of the notch 151, and the edge of the notch 151 is located inside the edge of the opening 213 along the radial extension line of the clamping ring 21.

[0066] The notch 151 is arranged on the side of the sealing portion 15 facing away from the accommodating hole 13, so that when the inner diameter of the clamping ring 21 is reduced, the sealing portion 15 at the notch 151 can be deformed toward the accommodating hole 13, thereby avoiding the problem of a gap between the sewing ring 10 and the inlet tube of the ventricular assist device caused by the outward deformation of the position of the sealing portion 15 corresponding to the notch 151, thereby ensuring the sealing performance of the sewing ring 10 on the inlet tube and further reducing the risk of bleeding.

[0067] In this embodiment, the notch 151 is provided on the first flange 152 and extends along the circumference of the first flange 152. The notch 151 also penetrates both sides of the first flange 152 along the axial direction of the first flange 152. In other embodiments, when the sealing portion 15 is not provided with the first flange 152, the notch 151 can also be provided on the annular wall of the sealing portion 15, as long as it is provided on the side of the sealing portion 15 facing away from the receiving hole 13.

[0068] See also Figure 10In one embodiment, the ventricular connection mechanism 1 further includes a fixing ring 40, which includes a ring body 41 and a protruding buckle 42; the ring body 41 is an annular structure, which is fixed to the suture ring 10 and surrounds the clamping ring 21, and the protruding buckle 42 is provided on the ring body 41 and protrudes from the ring body 41 for clamping by a clamp (not shown), so that the clamp can firmly clamp the ventricular connection mechanism 1, thereby facilitating the implantation operation of the ventricular assist device.

[0069] In this embodiment, there are multiple protrusions 42, each spaced apart along the circumference of the ring body 41. Furthermore, the multiple protrusions 42 are evenly spaced along the circumference of the ring body 41, meaning that the central angles between adjacent protrusions 42 are equal. For example, in one embodiment, the ring body 41 is provided with five protrusions 42, and the central angles between adjacent protrusions 42 are 72°. This ensures that the force applied to the retaining ring 40 is more evenly distributed when the clamp is clamped. In another embodiment, the multiple protrusions 42 can also be unevenly spaced along the circumference of the ring body 41, meaning that the central angles between adjacent protrusions 42 are unequal, without limitation.

[0070] The buckle 42 includes a main body 421 and a protrusion 422. The main body 421 is connected to the top of the ring body 41 and extends axially along the ring body 41. The protrusion 422 is connected to the end of the main body 421 away from the ring body 41 and protrudes outward from the main body 421 in the radial direction of the ring body 41. The protrusion 422 is used to engage with the clamp to improve the stability of the clamp in clamping the ventricular connection mechanism 1. Furthermore, in one embodiment, the main body 421 can be a cylindrical structure or a rectangular columnar structure, and the protrusion 422 can be a circular arc-shaped protrusion structure or a triangular protrusion structure, which is not limited here.

[0071] In other embodiments, the number of the protrusion 42 can also be one, and the protrusion 42 can be annular and can be clamped by the clamp, thereby facilitating the implantation of the ventricular assist device. In other embodiments, the number of the protrusion 42 can also be two, and the two protrusions 42 can be roughly semi-annular.

[0072] In one embodiment, the buckle 42 and the ring body 41 are integrally formed, for example, by injection molding, to increase the connection strength between the buckle 42 and the ring body 41. In another embodiment, the buckle 42 can be fixed to the top of the ring body 41 by welding or gluing.

[0073] See also Figure 5 and Figure 11In this embodiment, the ring body 41 of the fixing ring 40 and the clamping ring 21 are both mounted within the first annular groove 111. This eliminates the need for a separate groove in the suture area outside the first annular groove 111 to accommodate the ring body 41. This ensures the width of the suture area of ​​the suture portion 14, facilitating the surgeon's attachment of the suture portion 14 to the heart. Furthermore, since both the ring body 41 of the fixing ring 40 and the clamping ring 21 are mounted within the first annular groove 111, eliminating the need for a separate groove and simplifying the manufacturing process of the ventricular connection mechanism 1.

[0074] In other embodiments, the ring body 41 of the fixing ring 40 and the clamping ring 21 can be installed in different positions so that the installation of the ring body 41 and the clamping ring 21 do not affect each other, thereby facilitating the installation of the ring body 41 and the clamping ring 21. For example, the clamping ring 21 is installed in the first annular groove 111, and the ring body 41 is fixed to the suture top surface 141. Alternatively, the ring body 41 is fixed in another groove different from the first annular groove 111, as long as it can be clamped by the clamp.

[0075] Specifically, the ring body 41 is disposed in the first annular groove 111 and sleeved outside the clamping ring 21 , and the protruding buckle 42 extends along the axial direction of the ring body 41 and protrudes outside the first annular groove 111 .

[0076] Furthermore, the first annular groove 111 further includes a groove side surface 1114 located on one side of the groove bottom surface 1112 and facing the sealing portion 15. The groove side surface 1114 is the outer circumferential surface of the sealing portion 15. A second flange 24 is provided on the outer circumference of the clamping ring 21, extending toward the groove side surface 1114. The second flange 24 is an annular structure and is disposed around the first step 23. The second flange 24 extends in the opposite direction to the first step 23, that is, toward the ring body 41 of the fixing ring 40. A second slot 241 is formed between the second flange 24 and the groove bottom surface 1112 of the first annular groove 111. The ring body 41 of the fixing ring 40 is disposed between the second flange 24 and the groove side surface 1114. A second step 43 is also provided on the inner circumference of the fixing ring 40. The second step 43 is an annular structure.

[0077] The second step 43 engages with the second slot 241, that is, the second step 43 abuts between the second flange 24 and the bottom surface 1112 of the first annular groove 111. In this way, the second flange 24 can axially position the retaining ring 40, allowing the clamping ring 21 to press the retaining ring 40 into the first annular groove 111, thereby strengthening the connection between the retaining ring 40 and the sewing ring 10 and preventing the retaining ring 40 from separating from the sewing ring 10 during operation. In one embodiment, the protruding buckle 42, the ring body 41, and the second step 43 are integrally formed.

[0078] See also Figure 7 and Figure 12The clamping ring 21 further includes a connecting portion 25 connecting the first step 23 and the second flange 24. The second step 43 includes a step surface 431, a step side surface 432, and a chamfered surface 433. The step surface 431 faces away from the groove bottom surface 1112, the step side surface 432 faces away from the groove side surface 1114, and the chamfered surface 433 connects between the step surface 431 and the step side surface 432.

[0079] In this embodiment, the included angle α1 between the chamfered surface 433 and the step surface 431, and the included angle α2 between the step side surface 432 are both greater than 90°; and the height H1 of the chamfered surface 433 along the axial direction of the fixing ring 40 is greater than the height H2 of the step side surface 431 along the axial direction of the fixing ring 40, so as to avoid the connection portion 25. In this way, the first step 23 of the clamping ring 21 can be inserted into the first slot 155 ( Figure 3 ), to prevent the clamping ring 21 from contacting the fixing ring 40 during the installation process, so that the clamping ring 21 can be installed after the fixing ring 40 is installed.

[0080] Please continue reading Figure 9 and Figure 10 Furthermore, the ring body 41 is provided with a second avoidance groove 412, which penetrates the inner and outer sides of the ring body 41 along the radial direction of the ring body 41, and the second avoidance groove 412 is correspondingly connected to the first avoidance groove 143, and the first connecting arm 221 and the second connecting arm 222 are also arranged in the second avoidance groove 412. In this way, the first connecting arm 221 and the second connecting arm 222 are prevented from touching the fixing ring 40 when they approach each other, thereby ensuring that the clamping ring 21 can smoothly retract radially.

[0081] See also Figures 13 to 15 Optionally, in one embodiment, the ventricular connection mechanism 1 further includes a locking assembly 50 connected to both the first connecting arm 221 and the second connecting arm 222 to selectively move the first connecting arm 221 and the second connecting arm 222 closer together. When the locking assembly 50 drives the first connecting arm 221 and the second connecting arm 222 closer together, the clamping ring 21 retracts. This retraction of the clamping ring 21 reduces the diameter of the accommodating hole 13, allowing the sealing portion 15 to seal against the inlet tube, i.e., the inner wall of the sealing portion 15 is in close contact with the outer wall of the inlet tube.

[0082] The locking assembly 50 includes a fixed seat 51, a movable seat 52 and a locking member 53, wherein the fixed seat 51 is connected to the first connecting arm 221, the movable seat 52 is connected to the second connecting arm 222, the movable seat 52 and the fixed seat 51 move in coordination, one end of the locking member 53 is connected to the fixed seat 51, and the other end of the locking member 53 is selectively connected to or separated from the movable seat 52.

[0083] Specifically, one end of the locking member 53 is rotatably connected to the fixed seat 51, and the other end of the locking member 53 is provided with a snap-fitting portion 531. The movable seat 52 is provided with a curved surface 512, and the snap-fitting portion 531 is used to cooperate with the curved surface 512 of the movable seat 52. When the locking member 53 is driven to rotate relative to the fixed seat 51, the snap-fitting portion 531 contacts the curved surface 512 of the movable seat 52 and pushes the movable seat 52 to move closer to the fixed seat 51, thereby driving the second connecting arm 222 to move closer to the first connecting arm 221, thereby causing the clamping ring 21 to retract radially. After the clamping ring 21 retracts into place to clamp the inlet pipe, the snap-fitting portion 531 engages with the movable seat 52 to maintain the clamping ring 21 in the retracted state. It is understandable that there are many other ways in which the locking assembly 50 drives the first connecting arm 221 and the second connecting arm 222 to approach each other, which are not limited to the above-mentioned embodiments and are not described in detail here.

[0084] In one embodiment, the first connecting arm 221 is welded or bonded to the fixing base 51. One of the first connecting arm 221 and the fixing base 51 is provided with a first protrusion 2211, and the other is provided with a first groove 511, in which the first protrusion 2211 is embedded. In this embodiment, the first connecting arm 221 is provided with the first protrusion 2211 at the end, and the fixing base 51 is provided with the first groove 511. By having the first protrusion 2211 embedded in the first groove 511, the connection strength between the first connecting arm 221 and the fixing base 51 is improved. It is understandable that in other embodiments, the first protrusion 2211 can also be provided on the fixing base 51, and correspondingly, the first groove 511 is provided on the first connecting arm 221. In this way, the connection strength between the first connecting arm 221 and the fixing base 51 can also be increased.

[0085] Furthermore, the first connecting arm 221 has a first inclined surface 2212 facing away from the first end 211. The first inclined surface 2212 is inclined relative to the extension direction of the first connecting arm 221, and the first inclined surface 2212 mates with the surface of the fixing seat 51 facing the clamping ring 21. Specifically, the first inclined surface 2212 contacts and mates with the fixing seat 51, and the first connecting arm 221 and the fixing seat 51 are then connected and fixed by welding or bonding. The contact and mate between the first inclined surface 2212 and the fixing seat 51 increases the contact area between the first connecting arm 221 and the fixing seat 51, thereby strengthening the connection between the first connecting arm 221 and the fixing seat 51.

[0086] In one embodiment, the second connecting arm 222 is welded or bonded to the movable seat 52. One of the second connecting arm 222 and the movable seat 52 is provided with a second protrusion 2221, and the other is provided with a second groove 521, and the second protrusion 2221 is embedded in the second groove 521. In this embodiment, the end of the second connecting arm 222 is provided with a second protrusion 2221, and the movable seat 52 of the locking assembly 50 is provided with a second groove 521. By embedding the second protrusion 2221 in the second groove 521, the connection strength between the second connecting arm 222 and the movable seat 52 is improved. It is understandable that in other embodiments, the second protrusion 2221 can also be provided on the movable seat 52, and correspondingly, the second groove 521 is provided on the second connecting arm 222, which can also strengthen the connection strength between the second connecting arm 222 and the movable seat 52.

[0087] Furthermore, the second connecting arm 222 has a second inclined surface 2222 facing away from the second end 212. The second inclined surface 2222 is inclined relative to the extension direction of the second connecting arm 222, and the second inclined surface 2222 engages with the surface of the movable seat 52 facing the clamping ring 21. Specifically, the second inclined surface 2222 contacts and engages with the movable seat 52, and the second connecting arm 222 and the movable seat 52 are then connected and fixed by welding or bonding. The contact and engagement of the second inclined surface 2222 with the movable seat 52 increases the contact area between the second connecting arm 222 and the movable seat 52, thereby strengthening the connection between the second connecting arm 222 and the movable seat 52.

[0088] The present application also provides a ventricular assist system, comprising a ventricular assist device (not shown) and a ventricular connection mechanism 1 according to any of the above-described embodiments. The ventricular assist device comprises an inlet tube, which is disposed in the receiving hole 13. Thus, by driving the clamping ring 21 radially inwardly through the locking assembly 50, the sewing ring 10 is driven inwardly, thereby causing the sewing ring 10 to circumferentially clamp the inlet tube, thereby sealing the inlet tube and reducing the chance of blood leakage.

[0089] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A ventricular connection mechanism, characterized in that: include: a sewing ring capable of being sutured to the heart, the sewing ring being provided with a receiving hole for receiving an inlet tube of a ventricular assist device, and the sewing ring being provided with a first annular groove surrounding the receiving hole to separate the sewing ring into a sealing portion surrounding the receiving hole and a sewing portion surrounding the first annular groove; and The clamping assembly includes a clamping ring, at least a portion of which is embedded in the first annular groove, and the clamping ring is sleeved on the sealing portion. The clamping ring clamps the inlet pipe through the sealing portion, and the inner diameter of the clamping ring is adjustable to adjust the tightness of the sealing portion clamping the inlet pipe.

2. The ventricular connection mechanism according to claim 1, characterized in that: The suture ring has a suture bottom surface and a suture top surface facing away from the suture bottom surface, the suture bottom surface can fit against the outer wall of the heart, and the first annular groove is exposed on the suture top surface; the first annular groove has a groove bottom surface, and a first axial distance exists between the groove bottom surface and the suture top surface; the clamping ring has a ring top surface facing away from the groove bottom surface, and a second axial distance exists between the ring top surface and the groove bottom surface, and the second axial distance is less than or equal to the first axial distance.

3. The ventricular connection mechanism according to claim 1, wherein: The sewing ring is further provided with a second annular groove. The first annular groove and the second annular groove are provided on opposite sides of the sewing ring. The first annular groove and the second annular groove correspond to each other and are spaced apart along the axial direction of the sewing ring.

4. The ventricular connection mechanism according to claim 3, characterized in that: The depth of the second annular groove is d, and the minimum distance between the bottom surface of the first annular groove and the bottom surface of the second annular groove is t, wherein: 0.2≤d / t≤0.

4.

5. The ventricular connection mechanism according to claim 1, wherein: The outer peripheral surface of the sealing portion is provided with a first flange extending radially outwardly along the sealing portion, and a first slot is formed between the first flange and the bottom surface of the first annular groove; the inner periphery of the clamping ring is provided with a first step, and the first step is inserted and matched with the first slot.

6. The ventricular connection mechanism according to claim 1, characterized in that: The ventricular connection mechanism further comprises a fixing ring comprising a ring body and a convex buckle; wherein the ring body is fixed to the sewing ring and surrounds the clamping ring; the convex buckle protrudes from the ring body to be clamped by a clamp.

7. The ventricular connection mechanism according to claim 6, characterized in that: The suture ring has a suture bottom surface and a suture top surface facing away from the suture bottom surface. The suture bottom surface can fit the outer wall of the heart, and the first annular groove is exposed on the suture top surface. The ring body of the fixing ring and the clamping ring are both installed in the first annular groove.

8. The ventricular connection mechanism according to claim 7, characterized in that: The outer peripheral surface of the sealing portion is provided with a first flange extending radially outward along the sealing portion, and a first slot is formed between the first flange and the bottom surface of the first annular groove; the inner periphery of the clamping ring is provided with a first step, and the first step is inserted and matched with the first slot.

9. The ventricular connection mechanism according to claim 8, characterized in that: The first annular groove also has a groove side surface located on one side of the groove bottom surface and facing the sealing portion; the outer periphery of the clamping ring is provided with a second flange extending toward the groove side surface, and the second flange is spaced from the groove bottom surface of the first annular groove and forms a second slot; the ring body of the fixing ring is arranged between the second flange and the groove side surface, and the inner periphery of the ring body is also provided with a second step, and the second step is inserted and matched with the second slot.

10. The ventricular connection mechanism according to claim 9, characterized in that: The clamping ring has a connecting portion connecting the first step and the second flange; the second step includes a step surface facing away from the bottom surface of the groove, a step side surface facing away from the side surface of the groove, and a chamfered surface connecting the step surface and the step side surface, and the angles between the chamfered surface and the step surface and the step side surface are all greater than 90°; the height of the chamfered surface along the axial direction of the fixing ring is greater than the height of the step side surface along the axial direction of the fixing ring to avoid the connecting portion.

11. The ventricular connection mechanism according to claim 1, wherein: The clamping ring has an opening along the circumference of the clamping ring, and the sealing portion is provided with a notch corresponding to the position of the opening. The notch is arranged on the side of the sealing portion facing away from the accommodating hole so that the sealing portion at the notch can be deformed toward the accommodating hole when the inner diameter of the clamping ring is reduced.

12. The ventricular connection mechanism according to claim 1, wherein: The clamping assembly also includes two connecting arms connected to the clamping ring, and the two connecting arms can selectively move closer or farther away from each other to adjust the inner diameter of the clamping ring; the suture portion is provided with a first avoidance groove on the side of the first annular groove facing away from the sealing portion, and the first avoidance groove is connected to the first annular groove, wherein at least one of the connecting arms can extend into the first avoidance groove along the radial direction of the clamping ring through the first annular groove.

13. The ventricular connection mechanism according to claim 1, wherein: The clamping ring has an opening along the circumference of the clamping ring; the clamping assembly also includes a first connecting arm and a second connecting arm, and the first connecting arm and the second connecting arm are respectively connected to the opposite ends of the opening. The ventricular connection mechanism also includes a locking assembly, and the locking assembly is connected to both the first connecting arm and the second connecting arm to drive the first connecting arm and the second connecting arm to selectively move closer to or farther away from each other.

14. The ventricular connection mechanism according to any one of claims 1 to 13, characterized in that: The ventricular connection mechanism further comprises a sewing cloth, which covers the surfaces of the sewing ring and the clamping ring.

15. A ventricular assist system, characterized in that: The ventricular assist system includes a ventricular assist device and a ventricular connection mechanism according to any one of claims 1 to 14. The ventricular assist device includes an inlet tube, which is inserted into the accommodating hole.

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