Outlet connection mechanism and ventricular assist system

Abstract

The utility model relates to an outlet connecting mechanism and a ventricular assist system. The outlet connecting mechanism comprises a clamping assembly and an artificial blood vessel. The clamping assembly comprises a clamping ring and a locking piece, the clamping ring is provided with a suture hole, and the locking piece is arranged on the clamping ring and can adjust the inner diameter of the clamping ring; the artificial blood vessel comprises a main body tube section and a connecting tube section, the connecting tube section is connected to one end of the main body tube section, and the connecting tube section is arranged in the clamping ring and is in suture connection with the clamping ring through a suture hole in the clamping ring, so that the artificial blood vessel is fixedly connected with the clamping assembly without an additional structure. And the connection mode of the artificial blood vessel and the clamping assembly is simplified. When the artificial blood vessel needs to be fixed on the outlet tube of the ventricular auxiliary device, only the artificial blood vessel of the outlet connecting mechanism needs to be sleeved and assembled on the outlet tube and the clamping ring of the outlet connecting mechanism is locked, so that the tedious operation of binding by a binding wire is avoided, and the stability of connection between the artificial blood vessel and the outlet tube of the ventricular auxiliary device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly to an outlet connection mechanism and a ventricular assist system. Background Art

[0002] Ventricular assist devices used in the medical field usually use tying wires to bind an artificial blood vessel to the outlet tube of the ventricular assist device, and then use a clamping member to clamp the artificial blood vessel to the outlet tube. However, the method of connecting the artificial blood vessel to the outlet tube by tying wires is not only cumbersome in operation, but also prone to problems such as loose tying during the tying process due to uneven operating techniques of the operator. Since the tying process is performed during the operation, it is easy to cause unexpected separation of the artificial blood vessel and the outlet tube during use.

[0003] Based on this, there are also some ventricular assist devices that can achieve the connection between the artificial blood vessel and the outlet tube without tying wires. On the basis of connecting the connecting device to the artificial blood vessel, the connecting device is joined to the outlet tube, thereby realizing the connection between the artificial blood vessel and the outlet tube. However, the current connection method between the artificial blood vessel and the connecting device is relatively complex. Summary of the Utility Model

[0004] Based on this, in view of the above-mentioned technical problems, it is necessary to provide an outlet connection mechanism and a ventricular assist system with a simple structure that can stably and quickly connect an artificial blood vessel to an outlet tube.

[0005] The present application provides an outlet connection mechanism, which includes:

[0006] A clamping assembly, the clamping assembly includes a clamping ring and a locking member, the clamping ring is provided with a suture hole, the locking member is arranged on the clamping ring and can adjust the inner diameter size of the clamping ring; and

[0007] An artificial blood vessel, the artificial blood vessel includes a connected main pipe section and a connecting pipe section, the connecting pipe section is connected to one end of the main pipe section, the connecting pipe section is arranged inside the clamping ring and is sutured and connected to the clamping ring through the suture hole on the clamping ring.

[0008] In one embodiment, the outlet connection mechanism further includes at least one of the following features:

[0009] The artificial blood vessel further includes a folded pipe section, the folded pipe section is connected to the end of the connecting pipe section far from the main pipe section, and the folded pipe section can be turned outwards relative to the connecting pipe section to cover the side of the suture hole facing away from the connecting pipe section;

[0010] The suture hole penetrates through the circumferential wall of the clamping ring;

[0011] The number of the suture holes is multiple, and at least some of the suture holes are arranged in a circle at intervals along the circumferential direction of the clamping ring.

[0012] In one embodiment, the clamping ring includes a connected fixed section and a clamping section, and the clamping section is provided with the suture holes and the locking members; the clamping assembly further includes a sealing ring, and the sealing ring is arranged on the inner wall of the fixed section and sleeved on the outer periphery of the artificial blood vessel.

[0013] In one embodiment, the inner diameter of one end of the sealing ring close to the clamping section gradually decreases in the direction from the clamping section to the fixed section, so as to form a guiding inclined surface on the inner wall of the sealing ring.

[0014] In one embodiment, an annular groove is provided on the inner wall of the clamping ring, and an annular protrusion is protruded on the outer wall of the sealing ring, and the annular protrusion is embedded in the annular groove.

[0015] In one embodiment, the clamping ring is further provided with an assembly through hole, the assembly through hole is arranged on the groove bottom surface of the annular groove, and an assembly protrusion is provided on one side of the annular protrusion away from the connecting pipe section, and the assembly protrusion is matched with the assembly through hole.

[0016] The present application further provides a ventricular assist system, and the ventricular assist system includes a ventricular assist device and the outlet connection mechanism, and the ventricular assist device includes a pump body and an outlet pipe connected to the pump body; the connecting pipe section of the artificial blood vessel of the outlet connection mechanism is sleeved on the outlet pipe.

[0017] In one embodiment, a limiting groove is formed on the inner wall of the clamping ring, and a limiting protrusion is provided on the outer wall of the outlet pipe, and the limiting protrusion can be embedded in the limiting groove when the inner diameter of the clamping ring shrinks.

[0018] In one embodiment, a plurality of annular mounting grooves are provided on the outer wall of the outlet pipe, and the plurality of annular mounting grooves are distributed along the axial direction of the outlet pipe. The ventricular assist system further includes a plurality of annular sealing rings, and each annular sealing ring is arranged in a corresponding annular mounting groove and can abut against the inner wall of the artificial blood vessel.

[0019] In one embodiment, the ventricular assist system further includes at least one of the following features:

[0020] The plurality of annular sealing rings are located on both sides of the limiting protrusion in the axial direction of the outlet pipe;

[0021] In the direction from the pipe orifice of the outlet pipe to the pump body, the diameters of the plurality of annular sealing rings gradually increase;

[0022] In the direction from the nozzle of the outlet pipe to the pump body, the wall thickness of the outlet pipe gradually increases.

[0023] In the above-mentioned outlet connection mechanism and the ventricular assist system, the outlet connection mechanism includes a clamping assembly and an artificial blood vessel. The clamping assembly includes a clamping ring and a locking member. The locking member can adjust the inner diameter of the clamping ring to fix the artificial blood vessel to the outlet pipe of the ventricular assist device by adjusting the locking member. The connecting pipe section of the artificial blood vessel is arranged inside the clamping ring, and the connecting pipe section is sutured to the clamping ring through the suture holes on the clamping ring. Among them, the suturing of the connecting pipe section and the clamping ring can be completed before the operation, which can reserve sufficient suturing time for the operator to suture the connecting pipe section to the clamping ring, and then the artificial blood vessel can be fixed to the outlet pipe of the ventricular assist device by adjusting the locking member, avoiding the cumbersome operation of tying the artificial blood vessel to the outlet pipe with a binding wire during the operation, and naturally avoiding the phenomenon of insufficient tying, improving the efficiency of the assembly and disassembly of the artificial blood vessel, as well as the stability of the connection between the artificial blood vessel and the outlet pipe of the ventricular assist device. The connecting pipe section is sutured to the clamping ring through the suture holes on the clamping ring, so that the artificial blood vessel is fixedly connected to the clamping assembly, and no additional locking structure is required to fixedly connect the two, simplifying the structure of the outlet connection mechanism. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the clamping assembly provided by an embodiment of the present application.

[0025] Figure 2 It is a schematic structural diagram of the outlet connection mechanism provided by an embodiment of the present application.

[0026] Figure 3 It is Figure 2 A partial structural schematic diagram of the outlet connection mechanism shown.

[0027] Figure 4 It is Figure 3 A partial plan schematic diagram of the outlet connection mechanism shown.

[0028] Figure 5 It is Figure 4 A cross-sectional view taken along the A-A direction.

[0029] Figure 6 It is a schematic structural diagram of the ventricular assist system provided by an embodiment of the present application.

[0030] Figure 7 It is Figure 6 A partial exploded view of the ventricular assist device of the ventricular assist system shown.

[0031] Figure 8 It is Figure 6 A partial plan schematic diagram of the ventricular assist system shown.

[0032] Figure 9 is Figure 8 A sectional view taken along the B-B direction.

[0033] Figure 10 is Figure 9 An enlarged partial view at C.

[0034] Reference numerals in the drawings:

[0035] 1. Outlet connection mechanism; 10. Clamping assembly; 11. Clamping ring; 110. Clamping hole; 111. Fixed section; 112. Clamping section; 12. Locking member; 13. Sealing ring; 1111. Annular groove; 113. Assembly through hole; 121. Stitching hole; 1211. First opening; 1212. Second opening; 122. Limiting groove; 131. Annular protrusion; 132. Assembly protrusion; 133. Guide inclined surface; 20. Artificial blood vessel; 201. Main pipe section; 202. Connecting pipe section; 203. Folded pipe section; 30. Ventricular assist device; 31. Outlet pipe; 311. Annular mounting groove; 3111. Annular sealing ring; 312. Limiting protrusion; 32. Pump body. Detailed implementation manners

[0036] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that if there appear such terms as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0038] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0041] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0042] Referring to Figures 1 to 5 , this application provides an outlet connection mechanism 1, and the outlet connection mechanism 1 includes a clamping assembly 10 and an artificial blood vessel 20. First, as Figure 1 shown, Figure 1The clamping assembly 10 in the outlet connection mechanism 1 is shown. The clamping assembly 10 includes a clamping ring 11 and a locking member 12. The clamping ring 11 is provided with a suture hole 121. The locking member 12 is arranged on the clamping ring 11 and can adjust the inner diameter size of the clamping ring 11. For example, the clamping ring 11 can be set to have a locking state and a release state. The clamping ring 11 has a first inner diameter in the locking state and a second inner diameter in the release state. The first inner diameter is smaller than the second inner diameter, that is, when the clamping ring 11 changes from the release state to the locking state, its inner diameter will shrink.

[0043] In an embodiment, the clamping ring 11 can adopt an annular structure, and the locking member 12 can adopt a locking component such as a buckle with a locking function. The locking member 12 can be opened or buckled relative to the clamping ring 11. When the locking member 12 is in the open state, the clamping ring 11 presents a release state; when the locking member 12 is in the buckled state, the clamping ring 11 presents a locking state due to the buckling of the locking member 12, thereby switching the first inner diameter space and the second inner diameter space of the clamping ring 11. In addition, those skilled in the art can also set the clamping ring 11 through other structures, such as an elastic ring with elasticity or a bolt locking ring with a bolt locking structure, etc., which are not limited herein.

[0044] The clamping assembly 10 can be fixedly connected to the artificial blood vessel 20. For example, the clamping assembly 10 is fixedly connected to the end of the artificial blood vessel 20. The clamping assembly 10 can be fixed to the outlet pipe 31 of the ventricular assist device 30, so as to fix the artificial blood vessel 20 to the outlet pipe 31 of the ventricular assist device 30.

[0045] Refer to Figure 2 , the artificial blood vessel 20 includes a connected main pipe section 201 and a connecting pipe section 202. The connecting pipe section 202 is connected to one end of the main pipe section 201. The connecting pipe section 202 is arranged inside the clamping ring 11 and is sutured to the clamping ring 11 through the suture hole 121 on the clamping ring 11.

[0046] The above-mentioned outlet connection mechanism 1 includes a clamping assembly 10 and an artificial blood vessel 20. The clamping assembly 10 includes a clamping ring 11 and a locking member 12. The locking member 12 can adjust the inner diameter of the clamping ring 11 to fix the artificial blood vessel 20 to the outlet pipe 31 of the ventricular assist device 30 by adjusting the locking member 12. The connecting pipe section 202 of the artificial blood vessel 20 is arranged inside the clamping ring 11, and the connecting pipe section 202 is sutured and connected to the clamping ring 11 through the suture holes 121 on the clamping ring 11. Among them, the suturing of the connecting pipe section 202 and the clamping ring 11 can be completed before the operation, which can reserve sufficient suturing time for the operator to suture the connecting pipe section 202 to the clamping ring 11, and then the artificial blood vessel 20 can be fixed to the outlet pipe 31 by adjusting the locking member 12, avoiding the cumbersome operation of tying the artificial blood vessel 20 to the outlet pipe 31 with a binding wire during the operation, and naturally avoiding the phenomenon of loose tying caused by busyness or unskilled techniques during the operation, improving the efficiency of the assembly and disassembly of the artificial blood vessel 20, as well as the stability of the connection between the artificial blood vessel 20 and the outlet pipe 31 of the ventricular assist device 30. The connecting pipe section 202 is sutured and connected to the clamping ring 11 through the suture holes 121 on the clamping ring 11, so that the artificial blood vessel 20 is fixedly connected to the clamping assembly 10, and no additional locking structure is required to fixedly connect the two, simplifying the structure of the outlet connection mechanism 1.

[0047] The suture hole 121 has opposite first opening 1211 and second opening 1212. Among them, the connecting pipe section 202 can cover the first opening 1211, so that the suture passes through the suture hole 121 and the connecting pipe section 202, thereby realizing the suture connection between the artificial blood vessel 20 and the clamping assembly 10. In this embodiment, the suture hole 121 penetrates the circumferential wall of the clamping ring 11, that is, the first opening 1211 of the suture hole 121 is arranged on the inner circumferential surface of the clamping ring 11, and the second opening 1212 is arranged on the outer circumferential surface of the clamping ring 11. For example, the suture hole 121 penetrates the circumferential wall of the clamping ring 11 along the radial direction of the clamping ring 11. In one implementation manner, the suture hole 121 can also be an inclined hole, that is, the first opening 1211 of the suture hole 121 is arranged on the inner circumferential surface of the clamping ring 11, and the second opening 1212 can be arranged on the end surface of the clamping ring 11 away from the main pipe section 201. In other implementation manners, both the first opening 1211 and the second opening 1212 of the suture hole 121 can be arranged on the inner circumferential surface of the clamping ring 11, or both can be arranged on the outer circumferential surface of the clamping ring 11, as long as the purpose of suturing and connecting the connecting pipe section 202 to the clamping ring 11 through the suture hole 121 on the clamping ring 11 is satisfied.

[0048] The artificial blood vessel 20 further includes a folded tube section 203. The folded tube section 203 is connected to one end of the connecting tube section 202 away from the main tube section 201. The folded tube section 203 can be folded outwards relative to the connecting tube section 202 to cover one side of the suture hole 121 facing away from the connecting tube section 202. That is, the folded tube section 203 can cover the second opening 1212 of the suture hole 121. In this way, the suture can pass through the folded tube section 203, the suture hole 121, and the connecting tube section 202 in sequence to suture and connect the folded tube section 203 with the clamping ring 11, thereby increasing the connection strength between the artificial blood vessel 20 and the clamping assembly 10.

[0049] In one embodiment, the number of suture holes 121 is multiple, and at least some of the suture holes 121 are arranged in a circle at intervals along the circumference of the clamping ring 11, so that the sutures passing through the suture holes 121 can be arranged along the circumference of the clamping ring 11, making the structure of the outlet connection mechanism 1 more compact. In this embodiment, all the suture holes 121 are arranged in a circle at intervals along the circumference of the clamping ring 11. In other embodiments, in addition to some of the suture holes 121 being arranged in a circle at intervals along the circumference of the clamping ring 11, some of the suture holes 121 can also be arranged at other positions of the clamping ring 11 as long as they can allow the suture to pass through.

[0050] Continue to refer to Figure 1 , the clamping ring 11 is further provided with a clamping hole 110, and the clamping hole 110 is the inner hole surrounded by the clamping ring 11. The clamping ring 11 includes a connected fixed section 111 and a clamping section 112. Among them, the fixed section 111 is sleeved on the outer periphery of the connecting tube section 202, and the clamping section 112 is provided with a suture hole 121 and a locking member 12, so that the folded tube section 203 can be sutured and connected to the clamping section 112.

[0051] The fixed section 111 and the clamping section 112 are sleeved and assembled outside the connecting tube section 202. For example, the fixed section 111 and the clamping section 112 are sleeved and assembled at the end of the artificial blood vessel 20. The folded tube section 203 is folded outwards relative to the connecting tube section 202, and at least a part of the clamping section 112 is fixed between the connecting tube section 202 and the folded tube section 203.

[0052] In this embodiment, the artificial blood vessel 20 can be connected to the clamping section 112 by suture. For example, at least one suture hole 121 is formed in the clamping section 112, and the artificial blood vessel 20 is sutured to the clamping assembly 10 by passing a suture through the suture hole 121. For example, a plurality of suture holes 121 surrounding the circumference can be provided at the end of the clamping section 112, and the artificial blood vessel 20 is fixed to the clamping section 112 by suture by passing a suture through the plurality of suture holes 121, thereby increasing the connection strength between the artificial blood vessel 20 and the clamping section 112. In one embodiment, the artificial blood vessel 20 can also be connected to the clamping assembly 10 by adhesion. In another embodiment, the artificial blood vessel 20 can also be connected to the clamping assembly 10 by both adhesion and suture, which can be specifically set according to the actual situation.

[0053] Continue to refer to Figure 1 As shown, the outlet connection mechanism 1 further includes a sealing ring 13. The sealing ring 13 is disposed in the inner wall of the fixed section 111 or the clamping section 112, sleeved on the outer periphery of the artificial blood vessel 20, and at least a part of the sealing ring 13 extends into the clamping hole 110. Therefore, when the clamping section 112 and the fixed section 111 are sleeved and assembled outside the artificial blood vessel 20, the sealing ring 13 can be used for sealing contact with the artificial blood vessel 20 to improve the sealing performance of the assembly between the artificial blood vessel 20 and the fixed section 111.

[0054] In this embodiment, the sealing ring 13 can be a rubber ring. The rubber ring has the function of deformation and can achieve the sealing effect through deformation. Therefore, the rubber ring is fixed on the inner circumference of the fixed section 111 and located between the artificial blood vessel 20 and the fixed section 111, and can deform under the extrusion state of the mutual sleeved assembly of the artificial blood vessel 20 and the fixed section 111 to provide a good sealing effect. In other embodiments, the sealing ring can also be a silicone part or a structure made of other materials with certain elasticity.

[0055] When the artificial blood vessel 20 is sleeved and assembled with the outlet pipe 31 of the ventricular assist device 30, the sealing ring 13 can also be set to form an abutting assembly state with the outlet pipe 31. When the artificial blood vessel 20 is sleeved and assembled on the outlet pipe 31, through the abutment of the sealing ring 13 with the outlet pipe 31, on the basis of fixing the artificial blood vessel 20 to the outlet pipe 31, the sealing performance between the artificial blood vessel 20 and the outlet pipe 31 is further improved, and blood leakage between the artificial blood vessel 20 and the outlet pipe 31 is minimized as much as possible.

[0056] Continue to refer to Figure 1In one embodiment, the inner wall of the fixing section 111 is provided with an annular groove 1111, and the outer wall of the sealing ring 13 is provided with an annular protrusion 131. The sealing ring 13 is fitted with the annular groove 1111 of the fixing section 111 through the annular protrusion 131, so that the fixing section 111 and the sealing ring 13 are stably sleeved and assembled together. The number of the annular groove 1111 and the annular protrusion 131 is the same, and can be set to one or more. Moreover, the clamping ring 11 is also provided with an assembly through hole 113, which is provided on the groove bottom surface of the annular groove 1111. The side of the annular protrusion 131 facing away from the connecting pipe section 202 is provided with an assembly protrusion 132, and the assembly protrusion 132 cooperates with the assembly through hole 113, so that the clamping ring 11 and the sealing ring 13 are stably sleeved and assembled together. The number of the assembly through hole 113 and the assembly protrusion 132 is the same, and can be set to one or more. In addition, in one embodiment, the sealing ring 13 may be integrally injection molded with the fixing section 111 , which is not limited here.

[0057] At least a part of the inner wall of the sealing ring 13 may also be provided with a guiding bevel 133, which has a guiding function and can guide the process of the outlet connection mechanism 1 being sleeved on the outlet tube 31, so as to facilitate the installation of the outlet connection mechanism 1 on the outlet tube 31. In particular, in the above-mentioned assembly state where the sealing ring 13 abuts against the outlet tube 31 to prevent blood from leaking from between the artificial blood vessel 20 and the outlet tube 31, the guiding function of the guiding bevel 133 can guide the process of the outlet connection mechanism 1 being sleeved on the outlet tube 31, so as to prevent the outlet connection mechanism 1 from being smoothly sleeved on the outlet tube 31 due to the abutting assembly state between the sealing ring 13 and the outlet tube 31.

[0058] In one embodiment, the inner diameter of the end of the sealing ring 13 close to the clamping section 112 is gradually reduced in the direction from the clamping section 112 to the fixing section 111, so as to form a guide slope 133 on the inner wall of the sealing ring 13. The guide slope 133 is formed on the inner wall of the sealing ring 13, and the sealing ring 13 and the artificial blood vessel 20 are also abutted. Specifically, when the outlet connection mechanism 1 is installed on the outlet pipe 31, the clamping assembly 10 moves in the direction from the clamping section 112 to the fixing section 111, and the gap between the sealing ring 13 and the outlet pipe 31 becomes smaller and smaller until the artificial blood vessel 20 abuts between the sealing ring 13 and the outlet pipe 31, thereby reducing the probability of blood leakage from between the artificial blood vessel 20 and the outlet pipe 31.

[0059] See also Figures 6 to 10, the present application provides a ventricular assist system, which includes a ventricular assist device 30 and an outlet connection mechanism 1. The ventricular assist device 30 includes a pump body 32 and an outlet pipe 31 connected to the pump body 32. An artificial blood vessel 20 is sleeved on the outlet pipe 31. Specifically, in the locked state of the clamping section 112, the connecting pipe section 202 of the artificial blood vessel 20 fixed to the clamping section 112 is locked and assembled with the outlet pipe 31.

[0060] In one embodiment, an annular mounting groove 311 is provided on the outer wall of the outlet pipe 31. The ventricular assist system further includes an annular sealing ring 3111, which is disposed in the annular mounting groove 311 and can abut against the inner wall of the artificial blood vessel 20, so that the artificial blood vessel 20 is hermetically sleeved and assembled with the outlet pipe 31 through the annular sealing ring 3111. Among them, the annular sealing ring 3111 can radially abut against the clamping section 112 in the locked state, so that the clamping section 112 presses the artificial blood vessel 20 against the annular sealing ring 3111 in the locked state, avoiding blood leakage between the artificial blood vessel 20 and the outlet pipe 31 and further reducing the probability of blood leakage.

[0061] In one embodiment, a limiting groove 122 is formed on the inner wall of the clamping ring 11, and a limiting protrusion 312 is provided on the outer wall of the outlet pipe 31. The limiting protrusion 312 can be embedded in the limiting groove 122 when the inner diameter (the aperture of the clamping hole 110) of the clamping ring 11 shrinks. For example, a limiting groove 122 can be formed between the clamping section 112 and the fixing section 111, and the limiting protrusion 312 can be used for fitting and assembling with the limiting groove 122 of the outlet connection mechanism 1. Through the cooperation of the limiting protrusion 312 and the limiting groove 122, the axial displacement of the outlet connection mechanism 1 along the outlet pipe 31 can be restricted, avoiding the separation of the outlet connection mechanism 1 from the outlet pipe 31 along the axial direction of the outlet pipe 31, thereby increasing the connection strength between the artificial blood vessel 20 and the outlet pipe 31. In this embodiment, the limiting groove 122 is arranged along the circumferential direction of the clamping ring 11, the limiting protrusion 312 is arranged along the circumferential direction of the outlet pipe 31 on the outer wall of the outlet pipe 31, and the limiting groove 122 penetrates through the inner circumferential surface and the outer circumferential surface of the clamping ring 11, that is, the limiting groove 122 is a through groove. In other embodiments, the limiting groove 122 may not be arranged along the circumferential direction of the clamping ring 11, and the limiting groove 122 may only penetrate through the inner circumferential surface of the clamping ring 11 without penetrating its outer circumferential surface, that is, the limiting groove 122 may also be a blind groove.

[0062] In one embodiment, the number of the annular mounting grooves 311 and the annular sealing rings 3111 are both multiple, and the multiple annular mounting grooves 311 are distributed along the axial direction of the outlet pipe 31, and each annular sealing ring 3111 is disposed in the corresponding annular mounting groove 311. By radially abutting against the multiple annular sealing rings 3111, the clamping ring 11 can further reduce the probability of blood leakage.

[0063] Please refer to Figure 9 , in one embodiment, the limiting protrusion 312 can be arranged between any two adjacent annular mounting grooves 311. That is, a plurality of annular sealing rings 3111 are located on both sides of the limiting protrusion 312 in the axial direction of the outlet pipe 31.

[0064] In one embodiment, in the direction from the pipe orifice of the outlet pipe 31 to the pump body 32, the diameters of the plurality of annular sealing rings 3111 gradually increase, and the wall thickness of the outlet pipe 31 also gradually increases. The increase in the wall thickness of the outlet pipe 31 enables the size of the annular mounting grooves 311 that can be formed on the outlet pipe 31 to be larger, so as to arrange annular sealing rings 3111 with a larger diameter. The increase in the diameter of the annular sealing rings 3111 can generate a higher contact pressure, thereby improving the sealing effect of the annular sealing rings 3111 and further reducing the probability of blood leakage between the artificial blood vessel 20 and the outlet pipe 31. In one implementation manner, in the direction from the pipe orifice of the outlet pipe 31 to the pump body 32, the wall thickness of the outlet pipe 31 gradually increases, and the diameters of the plurality of annular sealing rings 3111 can remain unchanged. In another implementation manner, in the direction from the pipe orifice of the outlet pipe 31 to the pump body 32, the wall thickness of the outlet pipe 31 remains unchanged, and the diameters of the plurality of annular sealing rings 3111 can gradually increase.

[0065] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0066] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An outlet connection mechanism, characterized in that: The outlet connection mechanism comprises: A clamping assembly, the clamping assembly comprising a clamping ring and a locking piece, the clamping ring being provided with a suture hole, the locking piece being arranged on the clamping ring and capable of adjusting the inner diameter of the clamping ring; and An artificial blood vessel comprises a main pipe section and a connecting pipe section, wherein the connecting pipe section is connected to one end of the main pipe section, the connecting pipe section is arranged in the clamping ring, and is sutured and connected to the clamping ring through a suture hole on the clamping ring.

2. The outlet connection mechanism according to claim 1, characterized in that: The outlet connection mechanism also includes at least one of the following features: The artificial blood vessel further comprises a folded tube segment, which is connected to an end of the connecting tube segment away from the main tube segment, and the folded tube segment can be folded outward relative to the connecting tube segment to cover a side of the suture hole away from the connecting tube segment; The suture hole penetrates through the circumferential wall of the clamping ring; The number of the suture holes is multiple, and at least some of the suture holes are arranged in a circle at intervals along the circumference of the clamping ring.

3. The outlet connection mechanism according to claim 1, characterized in that: The clamping ring includes a connected fixing section and a clamping section, wherein the clamping section is provided with the suture hole and the locking member; the clamping assembly also includes a sealing ring, which is arranged on the inner wall of the fixing section and sleeved on the outer periphery of the artificial blood vessel.

4. The outlet connection mechanism according to claim 3, characterized in that: The inner diameter of one end of the sealing ring close to the clamping section gradually decreases in the direction from the clamping section to the fixing section, so as to form a guiding slope on the inner wall of the sealing ring.

5. The outlet connection mechanism according to claim 3, characterized in that: The inner wall of the clamping ring is provided with an annular groove, and the outer wall of the sealing ring is provided with an annular protrusion, and the annular protrusion is embedded in the annular groove.

6. The outlet connection mechanism according to claim 5, characterized in that: The clamping ring is also provided with an assembly through hole, which is arranged on the groove bottom surface of the annular groove. The side of the annular protrusion facing away from the connecting pipe section is provided with an assembly protrusion, which cooperates with the assembly through hole.

7. A ventricular assist system, characterized in that: The ventricular assist system includes a ventricular assist device and an outlet connecting mechanism as described in any one of claims 1 to 6, wherein the ventricular assist device includes a pump body and an outlet tube connected to the pump body; the connecting tube section of the artificial blood vessel of the outlet connecting mechanism is sleeved on the outlet tube.

8. The ventricular assist system according to claim 7, characterized in that: The inner wall of the clamping ring is provided with a limiting groove, and the outer wall of the outlet pipe is provided with a limiting protrusion, and the limiting protrusion can be embedded in the limiting groove when the inner diameter of the clamping ring is reduced.

9. The ventricular assist system according to claim 8, characterized in that: The outer wall of the outlet tube is provided with a plurality of annular mounting grooves, and the plurality of annular mounting grooves are distributed along the axial direction of the outlet tube. The ventricular assist system also includes a plurality of annular sealing rings, each of which is arranged in a corresponding annular mounting groove and can be against the inner wall of the artificial blood vessel.

10. The ventricular assist system according to claim 9, characterized in that: The ventricular assist system further comprises at least one of the following features: The plurality of annular sealing rings are located on both sides of the limiting protrusion in the axial direction of the outlet pipe; In the direction from the outlet pipe to the pump body, the diameters of the plurality of annular sealing rings gradually increase; In a direction from the pipe mouth of the outlet pipe to the pump body, the wall thickness of the outlet pipe gradually increases.

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