Anti-bleeding structure and blood pump system

Abstract

The application relates to a bleeding-preventing structure and a blood pump system, the bleeding-preventing structure comprising a positioning tube and a bleeding-preventing baffle; wherein the positioning tube is provided with an inlet end, a fixed end and a pumping channel; the pumping channel extends through the fixed end from the inlet end to be passed through by a blood pump; the bleeding-preventing baffle is arranged on the pumping channel to block fluid from passing through the pumping channel; the bleeding-preventing baffle is connected and fixed with the positioning tube, and the bleeding-preventing baffle is provided with a pump hole; the pump hole is communicated with the pumping channel to be penetrated by a catheter of the blood pump; and the bleeding-preventing baffle can be in interference fit with the catheter of the blood pump. The bleeding-preventing structure can replace a traditional artificial blood vessel to be connected to a blood vessel incision, so that the blood pump can pass through and extend into the blood vessel, and the blood leakage can be reduced, the blood loss of a patient can be effectively prevented, and the operation risk can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of surgical medical devices, in particular to a bleeding prevention structure and a blood pump system. BACKGROUND

[0002] A blood pump needs to be inserted into a patient's heart through an artificial blood vessel. When performing an interventional operation, an incision is made in the artery, and then the artificial blood vessel is fixed by suture and ligation with the blood vessel incision through a rubber plug. Then the blood pump is inserted into the artery through the artificial blood vessel and extends into the heart chamber. However, in the process of inserting the blood pump into the patient's body by using the artificial blood vessel, blood often leaks out of the artificial blood vessel, which can easily cause excessive loss of blood in the patient and increase the risk of surgery. SUMMARY

[0003] Therefore, the present application provides a bleeding prevention structure and a blood pump system to solve the problem of excessive blood loss during the process of inserting the blood pump into the patient's body.

[0004] In one embodiment, the bleeding prevention structure of the present application comprises a positioning tube and a bleeding prevention baffle; wherein the positioning tube is provided with an inlet end, a fixed end and a pumping channel; the pumping channel extends through the fixed end from the inlet end to accommodate the blood pump; the bleeding prevention baffle is arranged on the pumping channel to block the fluid from passing through the pumping channel; the bleeding prevention baffle is fixedly connected with the positioning tube, and the bleeding prevention baffle is provided with a pump hole in communication with the pumping channel to accommodate the catheter of the blood pump, and the bleeding prevention baffle can be in interference fit with the catheter of the blood pump.

[0005] In one embodiment, the bleeding prevention structure further comprises a connecting seat connected with the fixed end of the positioning tube, the connecting seat is arranged along the circumference of the fixed end; the bleeding prevention baffle is arranged on the fixed end to be close to the connecting seat, and the periphery of the bleeding prevention baffle is sealingly connected with the inner circumferential wall of the fixed end.

[0006] In one embodiment, the connecting seat comprises a connecting disc and a three-dimensional porous protective layer; wherein the connecting disc is arranged along the circumference of the fixed end; the three-dimensional porous protective layer is coated on the outer surface of the connecting disc, and the three-dimensional porous protective layer is provided with a through hole in communication with the pump hole.

[0007] In one embodiment, the connecting disc comprises a disc bottom surface, a disc top surface and a circumferential side surface; the three-dimensional porous protective layer covers the disc bottom surface, the disc top surface and the circumferential side surface; or the three-dimensional porous protective layer is made of at least one of a textile material, a woven cloth or a knitted material.

[0008] In one of the embodiments, the center of the connecting disc is provided with a clearance groove, which communicates the pump hole and the through hole, and the diameter of the clearance groove is gradually reduced in the direction from the fixed end to the inlet end, so that the side groove wall of the clearance groove is inclined towards the periphery of the anti-bleeding baffle.

[0009] In one of the embodiments, the connecting disc is integrally formed with the positioning tube and the anti-bleeding baffle, or at least one of the connecting disc, the positioning tube and the anti-bleeding baffle is made of silica gel material.

[0010] In one of the embodiments, the diameter of the pump hole is smaller than the diameter of the pumping channel.

[0011] In one of the embodiments, the outer peripheral wall of the positioning tube is provided with an annular groove extending in the circumferential direction of the positioning tube, or the outer peripheral wall of the positioning tube is provided with at least two annular grooves each extending in the circumferential direction of the positioning tube, and the at least two annular grooves are arranged in the length direction of the positioning tube.

[0012] In one of the embodiments, the outer peripheral wall of the positioning tube includes a cylindrical wall between adjacent two annular grooves, the annular groove has a groove bottom surface and groove side surfaces on opposite sides of the groove bottom surface, the groove bottom surface is coaxially arranged with the cylindrical wall, and the groove side surfaces are arranged in an arc shape and are transitionally connected with the cylindrical wall.

[0013] In one of the embodiments, the cylindrical wall has a first length in the length direction of the positioning tube, and the annular groove has a second length in the length direction of the positioning tube, and the first length is greater than the second length.

[0014] In one of the embodiments, the inner diameter of the inlet end of the positioning tube is gradually increased in the direction away from the fixed end, so as to form a guide inclined surface on the inner side wall of the inlet end.

[0015] In one of the embodiments, the anti-bleeding baffle is made of elastic material, so that the anti-bleeding baffle can elastically deform.

[0016] The application also provides a blood pump system, which comprises a blood pump and the anti-bleeding structure according to any one of the above embodiments, the blood pump comprises a pumping device and a catheter connected with the pumping device, the blood pump can enter from the inlet end of the anti-bleeding structure, pass through the pumping channel of the anti-bleeding structure, the pump hole of the anti-bleeding baffle and the fixed end, and then exit, so that the catheter is in interference fit with the pump hole.

[0017] The anti-bleeding structure of this application can replace the traditional artificial blood vessel connected to the vascular incision, allowing the blood pump to pass through and extend into the artery. The anti-bleeding structure uses an anti-bleeding baffle on the pumping channel of the positioning tube. This baffle has a pump hole communicating with the pumping channel, allowing the blood pump to pass through the pump hole into the pumping channel, but blocking blood and other fluids from passing through, thus preventing blood leakage from the positioning tube. In use, the fixed end of the positioning tube of the anti-bleeding structure can be connected and fixed to the vascular incision to position the anti-bleeding structure at the wound location; then, the blood pump is inserted into the pumping channel from the inlet end of the positioning tube. As the blood pump passes through the anti-bleeding baffle in the pumping channel, it passes through the pump hole of the anti-bleeding baffle and finally passes through the vascular incision from the fixed end of the positioning tube, allowing the distal end of the blood pump to extend into the patient's body; the blood pump catheter is partially inserted into the positioning tube, and the portion of the catheter inside the positioning tube is press-fitted with the pump hole of the anti-bleeding baffle. In this way, if the patient's blood enters the pumping channel from the vascular incision through the fixed end of the positioning tube, the blood will be blocked by the anti-bleeding baffle and will not leak out from the pumping channel to the inlet end of the positioning tube, thereby effectively preventing the patient's blood loss and reducing surgical risks. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an embodiment of the blood pump system described in this application.

[0020] Figure 2 for Figure 1 Another schematic diagram of the embodiment shown.

[0021] Figure 3 for Figure 2 A schematic cross-sectional view along the AA direction of the embodiment shown.

[0022] Figure 4 for Figure 2 The illustrated embodiment is shown in the following diagram.

[0023] Figure 5 for Figure 4 A partial enlarged schematic diagram of the embodiment shown.

[0024] Figure 6 for Figure 1 The illustrated embodiment is shown in an exploded view.

[0025] Figure 7 For Figure 6 Structural diagram of the anti-bleeding structure of the embodiment shown.

[0026] Figure 8 For Figure 7 Another direction diagram of the embodiment shown.

[0027] Figure 9 For Figure 7 Another direction diagram of the embodiment shown.

[0028] Figure 10 For Figure 7 Another direction diagram of the embodiment shown.

[0029] Figure 11 For Figure 10 B-B direction sectional view diagram of the embodiment shown.

[0030] Figure 12 For Figure 10 C-C direction sectional view diagram of the embodiment shown.

[0031] Figure 13 For Figure 12 Another identification diagram of the embodiment shown.

[0032] Figure 14 For Figure 12 Part structure enlarged diagram of the embodiment shown.

[0033] Figure 15 For Figure 12 Part structure enlarged diagram of the embodiment shown.

[0034] Figure 16 For Figure 15 Another identification diagram of the embodiment shown.

[0035] Figure 17 For Figure 12 Enlarged diagram at E of the embodiment shown.

[0036] Figure 18 For Figure 12 Enlarged diagram at F of the embodiment shown.

[0037] Reference signs:

[0038] Anti-bleeding structure 100, blood pump 200, positioning rope 300, blood pump system 500;

[0039] Positioning tube 110, connecting seat 120, anti-bleeding baffle 130, pump hole 131;

[0040] annular groove 112, pumping channel 114, guide slope 116, rounded corner 117, groove bottom surface 118, groove side surface 119, inlet end 101, outlet end 102;

[0041] land 121, three-dimensional porous protective layer 122, through hole 123, land bottom surface 125, land top surface 126, circumferential side surface 127, cylindrical wall 128;

[0042] avoidance slot 150, side slot wall 151, outer peripheral edge 152;

[0043] catheter 210, pumping device 220, driving unit 221, impeller 222, sleeve assembly 223;

[0044] vessel wall 410, vessel incision 411, vessel interior 420, suture 430. DETAILED DESCRIPTION

[0045] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0046] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the description of the specification are for illustrative purposes only and do not indicate the only implementation.

[0047] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0048] In the present application, unless otherwise explicitly specified and limited, the first feature is "on", "under" the second feature, which can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature, which can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The first feature is "below", "under" and "under" the second feature, which can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0049] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0050] In the related art, the blood pump needs to be inserted into the heart of the patient through the artificial blood vessel. When doing the intervention operation, the artery needs to be cut to form an incision, and then the artificial blood vessel is fixed by being tied and sutured with the blood vessel incision through the glue plug. Then the blood pump is inserted into the artery through the artificial blood vessel and extends into the heart chamber. However, the inner diameter of the artificial blood vessel is larger than the outer diameter of the blood pump, so that in the process of inserting the blood pump into the patient's body by using the artificial blood vessel, the blood in the artery will enter the artificial blood vessel from the blood vessel incision, and then leak out from the artificial blood vessel, which is extremely easy to cause excessive loss of blood of the patient, and the operation risk is high.

[0051] In view of this, the present application discloses a bleeding prevention structure and a blood pump system, which can be applied to the blood pump system for assisting the blood pump to be inserted into the patient's body, and can reduce the occurrence of the situation that the blood of the patient leaks out from the blood vessel incision through the bleeding prevention structure, thereby avoiding the excessive loss of blood of the patient and reducing the operation risk. The embodiments of the bleeding prevention structure and the blood pump system of the present application will be described in detail below. It should be pointed out that the terms "distal end" and "proximal end" used in the present application are used as directional words, which are the conventional terms in the field of interventional medical devices, wherein "distal end" means the end far away from the operator during the operation, and "proximal end" means the end close to the operator during the operation.

[0052] Please refer to Figures 1 to 3In one embodiment, the blood pump system 500 comprises the blood pump 200 and the anti-bleeding structure 100; wherein the blood pump 200 comprises the catheter 210 and the pumping device 220 connected with the catheter 210. In use, the anti-bleeding structure 100 is used to be connected and fixed with the blood vessel wall 410 around the blood vessel incision 411; then the blood pump 200 is passed through the anti-bleeding structure 100, so that the pumping device 220 of the blood pump 200 extends into the patient's body from the anti-bleeding structure 100, the blood vessel incision 411, and the catheter 210 of the blood pump 200 is partially retained in the anti-bleeding structure 100 and fixed with the anti-bleeding structure 100. Under the anti-bleeding effect of the anti-bleeding structure 100, the blood loss from the blood vessel incision 411 can be reduced. In order to facilitate understanding of the principle of preventing blood leakage of the anti-bleeding structure 100, the structure of the anti-bleeding structure 100 will be described in detail below.

[0053] Please refer to Figure 3 and Figure 4 In one embodiment, the anti-bleeding structure 100 comprises the positioning tube 110 and the anti-bleeding flap 130. The positioning tube 110 is provided with an inlet end 101, a fixed end 102 and a pumping channel 114; the pumping channel 114 extends through the fixed end 102 from the inlet end 101, so as to pass through the blood pump 200. The anti-bleeding flap 130 is arranged on the pumping channel 114 to block the fluid from passing through the pumping channel 114. The anti-bleeding flap 130 is connected with the positioning tube 110, and the anti-bleeding flap 130 is provided with a pump hole 131 which is in communication with the pumping channel 114 to pass through the catheter 210 of the blood pump 200, and the anti-bleeding flap 130 can be in interference fit with the catheter 210 of the blood pump 200.

[0054] Specifically, the inlet end 101 of the positioning tube 110 is suitable for inserting the blood pump 200 into the pumping channel 114; the fixed end 102 of the positioning tube 110 is suitable for passing out of the pumping channel 114 to extend into the blood vessel incision 411 of the patient. And the fixed end 102 of the positioning tube 110 can be used to be connected and fixed with the blood vessel wall 410 around the blood vessel incision 411 to fix the positioning tube 110 on the blood vessel wall 410. The diameter D2 of the pump hole 131 is smaller than the diameter D1 of the pumping channel 114 (as shown in Figure 11 The pumping device 220 of the blood pump 200 can smoothly pass through the pumping channel 114, and the catheter 210 of the blood pump 200 passes through the pump hole 131 of the anti-bleeding flap 130 and is in interference fit with the anti-bleeding flap 130.

[0055] In the use of the anti-bleeding structure 100 of the present application to assist the blood pump 200 to intervene in the patient's body, the fixed end 102 of the positioning tube 110 of the anti-bleeding structure 100 can be first connected and fixed with the blood vessel wall 410 around the blood vessel incision 411, so that the anti-bleeding structure 100 is positioned on the blood vessel; then the distal end of the blood pump 200 is inserted into the pumping channel 114 from the inlet end 101 of the positioning tube 110, when the distal end of the blood pump 200 encounters the anti-bleeding baffle 130, the distal end of the blood pump 200 is passed through the pump hole 131 of the anti-bleeding baffle 130, until the pumping device 220 of the blood pump 200 is passed out from the fixed end 102 of the positioning tube 110 and extends into the patient's body through the blood vessel incision 411. After the blood pump 200 intervention is completed, the pumping device 200 of the blood pump 200 is located in the patient's body; and the catheter 210 of the blood pump 200 is partially arranged in the positioning tube 110 of the anti-bleeding structure 100, and the catheter 210 is in interference fit with the pump hole 131 of the anti-bleeding baffle 130, so that if the patient's blood enters the pumping channel 114 from the fixed end 102 of the positioning tube 110 through the blood vessel incision 411, the blood will be blocked by the anti-bleeding baffle 130 and cannot leak out from the pumping channel 114 to the inlet end 101 of the positioning tube 110, effectively preventing the loss of patient's blood and reducing the risk of surgery.

[0056] It can be understood that the shape structure of the positioning tube 110 can have various design ways, which are not limited here, and can be optionally referred to Figure 8 In an embodiment, the anti-bleeding structure 100 further comprises a connecting seat 120 connected with the fixed end 102; the anti-bleeding baffle 130 is arranged on the fixed end 102 to be close to the connecting seat 120, and the periphery of the anti-bleeding baffle 130 is in sealing connection with the inner peripheral wall of the fixed end 102.

[0057] Specifically, the positioning tube 110 is arranged in a straight pipe shape, one end of the positioning tube 110 is arranged as the inlet end 101, and the other end is arranged as the fixed end 102. The pumping channel 114 extends along the length direction of the positioning tube 110 from the inlet end 101 and penetrates through the fixed end 102. By arranging the anti-bleeding baffle 130 on the fixed end 102, the anti-bleeding baffle 130 can be close to the connecting seat 120, so that blood can be blocked from the fixed end 102, so that blood cannot enter the pumping channel 114 at all.

[0058] In addition, the fixed end 102 can be connected and fixed with the blood vessel wall 410 around the blood vessel incision 411 through the connecting seat 120. The connecting seat 120 has a larger area in contact with the blood vessel wall 410 relative to the fixed end 102, so that the positioning tube 110 and the blood vessel wall 410 can be connected and fixed, and the supporting surface of the positioning tube 110 can be increased, thereby improving the stability of the positioning tube 110 installation. Of course, the connecting seat 120 is not necessary, that is, the positioning tube 110 can not include the connecting seat 120. In other embodiments, the fixed end 102 of the positioning tube 110 can be directly connected and fixed with the blood vessel incision 411 of the patient; or, the fixed end 102 can be provided with a rubber plug, so that the fixed end 102 is connected and fixed with the blood vessel incision 411 of the patient through the rubber plug.

[0059] Please refer to Figure 14 In one embodiment, the connecting seat 120 includes a connecting disc 121 and a three-dimensional porous protective layer 122; the connecting disc 121 is arranged along the circumference of the fixed end 102; the three-dimensional porous protective layer 122 is coated on the outer surface of the connecting disc 121; and the three-dimensional porous protective layer 122 is provided with a through hole 123 corresponding to the pump hole 131.

[0060] Specifically, when the connecting seat 120 is connected and fixed with the blood vessel wall 410, the connecting disc 121 of the connecting seat 120 can be in contact with the blood vessel wall 410, thereby increasing the contact area of the connecting seat 120 with the blood vessel wall 410, helping to suture the connecting seat 120 with the blood vessel wall 410, and preventing the suture from being torn. Alternatively, at least one of the positioning tube 110, the connecting disc 121 and the anti-bleeding baffle 130 is made of silica gel material, so that the material of the positioning tube 110 does not affect the health of the patient, and the positioning tube 110 is relatively soft and not easy to bruise the blood pump or the blood vessel.

[0061] In this embodiment, the positioning tube 110, the connecting disc 121 and the anti-bleeding baffle 130 are made of silica gel material, and the connecting disc 121 is integrally formed with the positioning tube 110 and the anti-bleeding baffle 130. The remaining embodiments are similar and will not be described in detail. The silica gel material has the advantages of safety, reliability and deformability, and can realize interference fit with the catheter 210 of the blood pump 200, thereby achieving reliable sealing effect. In addition, compared with the material used in traditional artificial blood vessels, the silica gel material has a relatively low price, which can greatly reduce the cost of the anti-bleeding structure 100, so that the cost of the anti-bleeding structure 100 is much lower than that of the traditional artificial blood vessel.

[0062] It can be understood that, since the outer surface of the connecting disc 121 is wrapped with the three-dimensional porous protective layer 122, which is a porous structure with numerous fine pores, the three-dimensional porous protective layer 122 can bear the pulling force of the suture thread when the connecting disc 121 is sutured, so as to reduce the force acting on the connecting disc 121, thereby avoiding the connecting disc 121 from being torn by the suture thread. In addition, since the three-dimensional porous protective layer 122 has numerous fine pores, when the blood flows from the blood vessel incision 411 to the connecting seat 120, the blood seeps into the three-dimensional porous protective layer 122 and coagulates on the pores of the three-dimensional porous protective layer 122, thereby blocking the blood from leaking and losing, and achieving the hemostatic function.

[0063] As for the material of the three-dimensional porous protective layer 122, the three-dimensional porous protective layer 122 is made of at least one of the following materials: textile material, woven cloth or knitted material. Further, in one embodiment, the three-dimensional porous protective layer 122 is made of polyester cloth. These materials have good hemostatic effect and low price, which helps to reduce the cost of the anti-bleeding structure 100.

[0064] Please refer to Figure 15 In one embodiment, the connecting disc 121 has a disc bottom surface 125, a disc top surface 126 and a circumferential side surface 127; the three-dimensional porous protective layer 122 covers the disc bottom surface 125, the disc top surface 126 and the circumferential side surface 127; that is, the connecting disc 121 is covered with the three-dimensional porous protective layer 122 except the position connected with the positioning tube 110, so that the micro-pore absorption capacity of the three-dimensional porous protective layer 122 can be fully utilized. As described above, not only can the three-dimensional porous protective layer 122 block the blood from continuing to lose in the way of promoting the blood coagulation on the pores of the three-dimensional porous protective layer 122, but also can properly protect the connecting disc 121 made of silicone material.

[0065] Please refer to Figure 7In one embodiment, the diameter of the conduit 210 of the blood pump 200 is generally smaller than the diameter of the pumping device 220, and the pump hole 131 of the blood-preventing baffle 130 is in interference fit with the conduit 210 (i.e. the diameter of the pump hole 131 is smaller than or equal to the diameter of the conduit 210), so as to ensure that the pumping device 220 of the blood pump 200 can smoothly pass through the pump hole 131 of the blood-preventing baffle 130, and avoid the peripheral edge of the pump hole 131 of the blood-preventing baffle 130 scratching the pumping device 220. Optionally, the blood-preventing baffle 130 is made of an elastic material, so that the blood-preventing baffle 130 can be elastically deformed. In this way, when the pumping device 220 of the blood pump 200 passes through the pump hole 131 of the blood-preventing baffle 130, the blood-preventing baffle 130 can be elastically deformed to expand the pump hole 131, so that the pumping device 220 can pass through the pump hole 131. After the pumping device 220 completely passes through the pump hole 131, the conduit 210 of the blood pump 200 reaches and passes through the pump hole 131. Since the diameter of the conduit 210 is smaller than the diameter of the pumping device 220, the pump hole 131 is contracted to be in interference fit with the conduit 210. On the other hand, this design is beneficial to ensure the stability of the installation of the conduit 210 and the pump hole 131, and ensure normal use, so as to avoid accidents caused by uncontrolled separation of the conduit 210 and the pump hole 131 during surgery or use.

[0066] The elastic material is preferably elastic and flexible, such as silicone. In this way, the peripheral edge of the pump hole 131 of the blood-preventing baffle 130 is relatively soft, and is not easy to scratch the peripheral wall of the blood pump 200. When the blood pump 200 passes through the pump hole 131 of the blood-preventing baffle 130, the peripheral wall of the blood pump 200 cooperates with the peripheral edge of the pump hole 131 of the blood-preventing baffle 130 to pull the blood-preventing baffle 130 towards the one end of the positioning tube. The blood-preventing baffle 130 can be elastically deformed under the pulling force, so as to buffer the pulling force and avoid the peripheral edge of the blood-preventing baffle 130 scratching the blood pump 200.

[0067] Please refer to Figure 15 Further, in order to facilitate the elastic deformation of the blood-preventing baffle 130, the connecting seat 120 is provided with an emptying groove 150, which connects the pump hole of the blood-preventing baffle 130 and the through hole of the three-dimensional porous protective layer 122. The emptying groove 150 not only allows the blood pump to pass through the pump hole, but also forms a deformation space for the elastic deformation of the blood-preventing baffle 130. After the connecting seat is connected and fixed with the blood vessel incision 411, the blood vessel incision 411 does not interfere with the deformation of the blood-preventing baffle 130.

[0068] Optionally, the diameter of the avoidance groove 150 is gradually reduced in the direction from the fixed end 102 to the inlet end 101, so that the side groove wall 151 of the avoidance groove 150 is inclined towards the periphery of the anti-bleeding flap 130. The side wall 151 of the avoidance groove 150 is also smoothly connected with the periphery of the anti-bleeding flap 130. During the insertion or extraction of the blood pump 200 into the pump hole 131, the anti-bleeding flap 130 will be elastically deformed, and the avoidance groove 150 provides a space for the deformation of the anti-bleeding flap 130. By inclining the side wall 151 of the avoidance groove 150 towards the periphery of the anti-bleeding flap 130, the radial space of the avoidance groove 150 can be increased, i.e. the avoidance groove 150 is expanded to increase the deformable space. On the one hand, this facilitates the penetration of the pumping device 220 of the blood pump 200 into the blood vessel incision 411, and on the other hand, it can reduce the stress on the periphery of the anti-bleeding flap 130, so that the anti-bleeding flap 130 is more easily deformed when subjected to the pulling force of the blood pump 200.

[0069] When the blood pump 200 penetrates the pump hole 131 of the anti-bleeding flap 130 through the pumping passage 114 of the positioning tube 110, the anti-bleeding flap 130 is deformed towards the avoidance groove 150, and due to the design of the avoidance groove 150, the anti-bleeding flap 130 has sufficient deformation accommodation space. When the blood pump 200 exits the pump hole 131, the anti-bleeding flap 130 is deformed towards the inlet end 101 of the pumping passage 114.

[0070] Optionally, as shown in Figure 16 The hole diameter D6 of the through hole 123 is greater than the outer peripheral diameter D7 of the outer periphery 152 of the avoidance groove 150, i.e. D6>D7. In other words, the through hole 123 of the three-dimensional porous protective layer 122 is larger than the outer periphery 152 of the avoidance groove 150 to avoid interference with the deformation of the anti-bleeding flap 130.

[0071] Please refer to Figure 5 and Figure 6 In a specific application, the catheter 210 penetrates the blood vessel wall 410 of the blood vessel to enter the inside 420 of the blood vessel. In the state that the connecting seat 120 of the anti-bleeding structure 100 abuts against the blood vessel wall 410, the connecting seat 120 and the blood vessel wall 410 are sutured by using the suture 430. In the present embodiment, the connecting seat 120 abuts against and is sutured with the blood vessel wall 410; for the embodiment without the connecting seat 120, the positioning tube 110 of the anti-bleeding structure 100 can directly abut against and be sutured with the blood vessel wall 410. Such a design is beneficial to reduce blood loss and reduce the risk of surgery.

[0072] Please refer to Figure 9In one embodiment, an annular groove 112 is formed on the outer circumferential wall of the positioning tube 110, and extends along the circumference of the positioning tube 110. Specifically, the annular groove 112 is recessed inwardly relative to the outer circumferential wall of the positioning tube 110. After the fixed end 102 of the positioning tube 110 is fixedly connected to the blood vessel wall 410, the annular groove 112 can be used to provide a binding position for the positioning rope 300, which is wrapped around and placed in the annular groove 112, and is not easy to move or fall off the positioning tube 110, which is conducive to improving the stability of the positioning tube 110 during operation and positioning.

[0073] In addition, the presence of the annular groove 112 can also weaken the hardness of the positioning tube 110, so that the pumping channel 114 of the positioning tube 110 can be elastically deformed in the radial direction. In this way, when the catheter 210 with a larger tube diameter passes through the pumping channel 114 of the positioning tube 110, the positioning tube 110 can be elastically deformed to be expanded to accommodate the catheter 210 with a tube diameter larger than the diameter D1 of the pumping channel 114. That is, more catheters 210 with different tube diameters are adapted, thereby improving the applicability of the anti-hemorrhage structure 100.

[0074] As for the number of annular grooves 112, the number of annular grooves 112 can be one or at least two. When the number of annular grooves 112 is at least two, the at least two annular grooves 112 are arranged at intervals along the length direction of the positioning tube 110. The operator or physician can select to wrap the positioning rope 300 on any one of the annular grooves 112 according to the needs, to meet the needs of fixing the positioning tube 110 at different positions. In this way, the elastic change of the positioning tube 110 along the length direction can be more uniform, and the situation that the positioning tube 110 locally blocks the catheter 210 can be avoided. Further, at least two of the annular grooves 112 are arranged at the two ends of the positioning tube 110. Such a design is easy to flexibly use one of the annular grooves 112 to bind the positioning rope 300 at a suitable position according to the in-vivo conditions.

[0075] Please refer to Figure 9 In this embodiment, the number of annular grooves 112 is three, and the three annular grooves 112 are arranged at intervals along the length direction L0 of the positioning tube 110. In other embodiments, the number of annular grooves 112 can be two, four or more.

[0076] Please refer to Figure 10 and Figure 11In one embodiment, the diameter D1 of the pumping channel 114 of the positioning tube 110 is greater than the diameter D2 of the pumping hole 131 of the anti-bleeding baffle 130, i.e. D1>D2; and the pumping hole 131 can be in interference fit with the catheter 210 of the blood pump 200, i.e. the diameter D2 of the pumping hole 131 is less than or equal to the diameter of the catheter 210. Since the anti-bleeding baffle 130 is in interference fit with the catheter 210 of the blood pump 200 at the pumping hole 131, when catheters 210 of different diameters are used, it can prevent blood from leaking into the pumping channel 114 or outside the anti-bleeding structure 100, thereby avoiding blood loss due to leakage after surgery.

[0077] Referring to Figure 12 and Figure 13 In one embodiment, the positioning tube 110 has a cylindrical wall 128 between two adjacent annular grooves 112; in this embodiment, the cylindrical wall 128 has a first length D4 extending along the length direction L0 of the positioning tube 110, and the annular groove 112 has a second length D5 extending along the length direction L0 of the positioning tube 110; wherein the first length D4 is greater than the second length D5. Such design makes the annular groove 112 shorter than the cylindrical wall 128, so as to provide a binding position for the positioning rope 300 and weaken the rigidity of the positioning tube 110, while ensuring the strength of the positioning tube 110, ensuring the service life of the positioning tube 110, and avoiding medical accidents.

[0078] Referring to Figure 18 In one embodiment, the annular groove 112 has a groove bottom surface 118 and groove side surfaces 119 located on opposite sides of the groove bottom surface; wherein the groove bottom surface 118 is coaxially arranged with the cylindrical wall 128; and the groove side surfaces 119 are arranged in an arc shape and transitionally connected with the cylindrical wall 128.

[0079] Specifically, the groove bottom surface 118 of the annular groove 112 is a cylindrical surface and is concentric with the cylindrical wall of the positioning tube 110; and the diameter of the cylindrical surface is less than the diameter of the cylindrical wall. The groove side surfaces 119 of the annular groove 112 are arranged in an arc shape, and the connection between the groove side surfaces 119 and the cylindrical wall 128 is provided with a rounded corner 117. Such structure design can make the positioning tube 110 smooth and reduce the collision damage with the tissue in the patient's body; and it is also beneficial to protect the positioning rope 300.

[0080] Referring to Figure 17In one embodiment, the inner diameter of the inlet end 101 of the positioning tube 110 gradually increases in the direction away from the fixed end 102 to form a guide slope 116 on the inner side wall of the inlet end 101, which is used to guide the blood pump 200 to be inserted into the pumping passage 114. Of course, in other embodiments, the inner diameter of the inlet end 101 of the positioning tube 110 can remain unchanged in the direction away from the fixed end 102. The inner diameter of the positioning tube 110 can also be understood as the diameter D1 of the pumping passage 114.

[0081] The anti-bleeding structure 100 and the blood pump system 500 will be further described below. Figures 1 to 18 Specifically, the anti-bleeding structure 100 includes the positioning tube 110 and the anti-bleeding flap 130, and can further include the connecting seat 120. The positioning tube 110 is used as a sleeve, and the connecting seat 120 is used as a base for being fixed to the artery by suturing. The anti-bleeding flap 130 is fixed to the base as a sealing structure to prevent blood from leaking out of the pumping passage 114. The diameter of the pump hole 131 of the anti-bleeding flap 130 is smaller than the diameter of the pumping passage 114 of the positioning tube 110 and is smaller than or equal to the outer diameter of the catheter 210 of the blood pump 200, so that the pump hole 131 of the anti-bleeding flap 130 can be in interference fit with the catheter 210 of the blood pump 200. The blood in the blood vessel is blocked by the anti-bleeding flap 130 and is difficult to enter the positioning tube 110 of the anti-bleeding structure 100 and to leak out of the positioning tube 110, which is beneficial to prevent blood from flowing out and thus reduce blood loss.

[0082] During the intervention surgery, the artery is first incised to form an incision, and the base of the anti-bleeding structure 100 is fixed to the artery, for example, the blood vessel wall 410 of the artery, by suturing with the suture line 430. Such a design enables the anti-bleeding structure 100 to replace the conventional artificial blood vessel to be connected to the blood vessel incision 411 for the blood pump to pass through and extend into the artery. Then the blood pump 200 is inserted into the artery blood vessel through the positioning tube 110 of the anti-bleeding structure 100 and the pump hole 131 of the anti-bleeding flap 130 and extends into the heart chamber until the catheter 210 of the blood pump 200 is in interference fit with the pump hole 131. Under the sealing effect of the interference fit, the anti-bleeding flap 130 blocks the blood from entering the positioning tube 110, i.e., due to the effect of the anti-bleeding flap, the blood in the artery is difficult to enter the anti-bleeding structure 100, thereby preventing the blood from flowing out of the incision, and thus reducing blood loss and effectively reducing the risk of surgery. It can be seen that the anti-bleeding structure 100 described in the present application has a simple structure relative to the artificial blood vessel and has a relatively low price.

[0083] The positioning tube 110 of the anti-hemorrhage structure 100 is provided with an inlet end 101 for the blood pump to enter, which can also be understood as the end of the positioning tube 110 away from the connecting seat 120 forming the inlet end 101 of the pumping channel 114, and the inlet end 101 is used for the blood pump 200 to insert into the pumping channel 114. The outer periphery of the positioning tube 110 is provided with an annular annular groove 112, which has two functions. One is to bind the positioning rope 300 to facilitate the positioning of the anti-hemorrhage structure 100, and the other is to increase the elasticity of the positioning tube 110, so that the positioning tube 110 can pass through blood pumps 200 or guide sheaths of different diameters. The guide sheath is a tool for inserting the blood pump, and the outer diameter of the guide sheath, the pumping device 220 or the cannula assembly 230 of the blood pump 200 may be larger than the outer diameter of the catheter 210. Therefore, it is necessary to increase the elasticity of the positioning tube 110 through the annular annular groove 112. The number of annular annular grooves 112 can be one or more, and the positioning rope can be bound in one of the multiple annular annular grooves 112.

[0084] Further, in one embodiment, the diameter D1 of the pumping channel 114 is less than or equal to the outer diameter or the maximum outer diameter of the blood pump 200, so that the blood pump 200 can pass through the pumping channel 114. In one specific application, the diameter of the inner cavity of the positioning tube 110, i.e. the diameter D1 of the pumping channel 114, is less than or equal to 8 mm, i.e. D1≤8 mm. D1 is preferably slightly smaller than the outer diameter of the blood pump 200, so that the positioning tube 110 can be in interference fit with the blood pump 200. The diameter D2 of the pump hole 131 is less than or equal to 3 mm, i.e. D2≤3 mm. The diameter D2 of the pump hole 131 is preferably slightly smaller than the outer diameter of the catheter 210, so that the pump hole 131 can be in interference fit with the catheter 210.

[0085] The connecting seat 120 of the anti-hemorrhage structure 100 includes a connecting disc 121 and a three-dimensional porous protective layer 122. The connecting disc 121 is integrally formed with the positioning tube 110, and both the connecting disc 121 and the positioning tube 110 are made of silica gel material, which has low cost, much lower than that of artificial blood vessels. The three-dimensional porous protective layer 122 wraps the connecting disc 121, and the three-dimensional porous protective layer 122 is provided with a through hole 123 opposite to the pump hole 131, which is used for the blood pump 200 to pass through, such as the catheter 210, the pumping device 220 and the cannula assembly 230 of the blood pump 200, all of which pass through the through hole 123. The three-dimensional porous protective layer 122 wraps the bottom surface 125, the top surface 126 and the circumferential side surface 127 of the connecting disc 121. In this embodiment, the three-dimensional porous protective layer 122 is made of polyester fabric, and in other embodiments, the three-dimensional porous protective layer 122 can also be replaced by other textile or woven materials.

[0086] The annular groove 112 comprises a groove bottom surface 118 and a groove side surface 119. The groove bottom surface 118 is arranged as a plane to facilitate positioning and binding of the rope 300, and the groove side surface 119 is arranged with a rounded corner 117. The anti-bleeding structure 100 can be connected to a blood vessel incision 411 to replace a traditional artificial blood vessel, so as to allow the blood pump 200 to pass through and extend into an artery, thereby reducing blood loss and reducing the risk of surgery.

[0087] Please refer to Figures 1 to 3 The anti-bleeding structure 100 can be connected to a blood vessel incision 411 to replace a traditional artificial blood vessel, so as to allow the blood pump 200 to pass through and extend into an artery, thereby reducing blood loss and reducing the risk of surgery.

[0088] In an embodiment, the pumping device comprises a driving unit 221, an impeller 222, and a sleeve assembly 223. The proximal end of the driving unit 221 is connected to the catheter 210. The distal end of the driving unit 221 is connected to the sleeve assembly 223. The rotating shaft 201 of the driving unit 221 extends into the sleeve assembly 223. The impeller 222 is arranged in the sleeve assembly 223 and is connected to the rotating shaft 201. The distal end of the sleeve assembly 223 is provided with a blood inlet, and the proximal end of the sleeve assembly is provided with a blood outlet 202. The impeller 222 is close to the blood outlet 202. Optionally, the diameter D2 of the pump hole 131 of the anti-bleeding structure 100 is less than or equal to the diameter of the catheter 210.

[0089] It should be noted that other embodiments of the present application also include the anti-bleeding structure and blood pump system formed by the combination of the technical features of the above-mentioned embodiments.

[0090] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0091] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An anti -bleeding structure, characterized by, The anti-bleeding structure comprises: a positioning tube provided with an inlet end, a fixed end and a pumping channel; the pumping channel extends from the inlet end to the fixed end for the blood pump to pass through; and an anti-bleeding baffle provided on the pumping channel to block the fluid from passing through the pumping channel, the anti-bleeding baffle is fixedly connected with the positioning tube, and the anti-bleeding baffle is provided with a pump hole in communication with the pumping channel for the catheter of the blood pump to pass through, and the anti-bleeding baffle can be in interference fit with the catheter of the blood pump; the anti-bleeding structure further comprises a connecting seat connected with the fixed end of the positioning tube, the connecting seat is arranged along the circumference of the fixed end; the anti-bleeding baffle is arranged on the fixed end to be close to the connecting seat, and the peripheral edge of the anti-bleeding baffle is sealingly connected with the inner peripheral wall of the fixed end; the connecting seat comprises a connecting disc and a three-dimensional porous protective layer; wherein the connecting disc is arranged along the circumference of the fixed end; the three-dimensional porous protective layer is covered on the outer surface of the connecting disc, and the three-dimensional porous protective layer is provided with a through hole in communication with the pump hole.

2. The anti -bleeding structure according to claim 1, characterized in that, The inlet end is suitable for inserting the blood pump into the pumping channel, and the fixed end is used for being fixedly connected with the blood vessel wall around the blood vessel incision to fix the positioning tube on the blood vessel wall; or the connecting seat is used for being sutured with the blood vessel wall.

3. The anti -bleeding structure according to claim 1, wherein The center of the connecting disc is provided with an emptying groove in communication with the pump hole and the through hole, the through hole has a hole diameter D6, and the outer peripheral edge of the emptying groove has an outer peripheral diameter D7, wherein D6>D7.

4. The anti -bleeding structure according to claim 1, wherein The connecting disc comprises a disc bottom surface, a disc top surface and a circumferential side surface; the three-dimensional porous protective layer covers the disc bottom surface, the disc top surface and the circumferential side surface; Alternatively, the three-dimensional porous protective layer is made of at least one of textile material, woven cloth or woven material.

5. The anti -bleeding structure according to claim 1, wherein The center of the connecting disc is provided with an emptying groove in communication with the pump hole and the through hole, the diameter of the emptying groove gradually decreases in the direction from the fixed end to the inlet end, so that the side groove wall of the emptying groove is inclined towards the peripheral edge of the anti-bleeding baffle.

6. The anti -bleeding structure according to claim 1, wherein The connecting disc is integrally formed with the positioning tube and the anti-bleeding baffle; or at least one of the connecting disc, the positioning tube and the anti-bleeding baffle is made of silica gel material.

7. The anti -bleeding structure according to any one of claims 1 to 6, wherein The diameter of the pump hole is smaller than the diameter of the pumping channel.

8. The anti -bleeding structure according to any one of claims 1 to 6, wherein The outer peripheral wall of the positioning tube is provided with an annular groove extending along the circumference of the positioning tube; Alternatively, the outer peripheral wall of the positioning tube is provided with at least two annular grooves, each of which extends along the circumference of the positioning tube, and the at least two annular grooves are arranged at intervals along the length direction of the positioning tube.

9. The anti -bleeding structure according to claim 8, characterized in that, The outer peripheral wall of the positioning tube comprises a cylindrical wall between adjacent two annular grooves; the annular groove has a groove bottom surface and groove side surfaces located on opposite sides of the groove bottom surface; wherein the groove bottom surface is coaxially arranged with the cylindrical wall; and the groove side surfaces are arranged in an arc shape and are transitionally connected with the cylindrical wall.

10. The anti -bleeding structure according to claim 9, characterized in that, The cylindrical wall has a first length along the length direction of the positioning tube, and the annular groove has a second length along the length direction of the positioning tube; wherein the first length is greater than the second length.

11. The anti -bleeding structure according to any one of claims 1 to 5, wherein An inner diameter of an inlet end of the positioning tube is gradually increased in a direction away from the fixed end to form a guide slope on an inner side wall of the inlet end.

12. The anti -bleeding structure according to any one of claims 1 to 5, wherein The anti-bleeding baffle is made of an elastic material, so that the anti-bleeding baffle can elastically deform.

13. A blood pump system, characterized by Comprising: a blood pump comprising a pumping device and a catheter connected with the pumping device; and The anti-bleeding structure according to any one of claims 1 to 12; wherein The blood pump can enter from an inlet end of the anti-bleeding structure, pass through a pumping channel of the anti-bleeding structure, a pump hole of the anti-bleeding baffle, and the fixed end, so that the catheter is in interference fit with the pump hole.

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