Left ventricular assist device

Abstract

The present application relates to the technical field of medical instruments, and in particular to a left ventricular assist device. The present application comprises a stent body, a battery assembly and a blood extracorporeal circulation device, wherein the blood extracorporeal circulation device and the battery assembly are arranged on the stent body, and the battery assembly is connected to the blood extracorporeal circulation device. The blood extracorporeal circulation device comprises a centrifugal pump, a first connecting pipeline, a second connecting pipeline and an in-vivo catheter, wherein the in-vivo catheter comprises a drainage tube body and a perfusion tube body, the drainage tube body is connected to an inlet of the centrifugal pump by means of the first connecting pipeline, the perfusion tube body is connected to an outlet of the centrifugal pump by means of the second connecting pipeline, and a plurality of perfusion openings are provided in the perfusion tube body. In the present application, the drainage tube body is provided to drain blood of the left ventricle, and the perfusion tube body is then used to perfuse the drained blood into the artery from the centrifugal pump, thereby reducing the cardiac load; moreover, by means of the provision of the stent body and the battery assembly, the blood extracorporeal circulation device can achieve the effects of light weight and portability during in-hospital first aid.

Description

Left ventricular assist device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202321373368.3, filed on May 31, 2023, entitled “LEFT VENTRICULAR ASSIST DEVICE,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the technical field of medical devices, and in particular to a left ventricular assist device. Background Art

[0004] A left ventricular assist device is a device that directly draws blood from the left ventricle to the outside of the body to reduce cardiac load, replace ventricular work, increase peripheral blood supply, and partially or completely replace the left ventricular ejection function. It is of great significance for the treatment of cardiogenic shock.

[0005] However, the current application of left ventricular assist devices in in-hospital emergency treatment has many limitations, such as poor portability. In-hospital emergency treatment refers to the rescue of patients in in-hospital environments such as emergency rooms, outpatient clinics, ICUs, and wards. In-hospital emergency treatment requires that the left ventricular assist device be implanted quickly and conveniently. The ideal implantation method is through a single femoral artery access. In addition, the device should also be lightweight, easy to move, and able to work for a long time without an external power supply. However, current mainstream products cannot meet the above requirements.

[0006] Summary of the Invention

[0007] In order to solve the above-mentioned technical problems or at least partially solve the above-mentioned technical problems, the present application provides a left ventricular assist device, comprising a stent body, a battery assembly and an extracorporeal blood circulation device, wherein the extracorporeal blood circulation device and the battery assembly are arranged on the stent body, and the battery assembly is connected to the extracorporeal blood circulation device, and the extracorporeal blood circulation device comprises a centrifugal pump, a first connecting pipeline, a second connecting pipeline and an in vivo catheter, and the in vivo catheter comprises a drainage tube body and a perfusion tube body, the drainage tube body is connected to the inlet of the centrifugal pump through the first connecting pipeline, and the perfusion tube body is connected to the outlet of the centrifugal pump through the second connecting pipeline, and a plurality of perfusion ports are provided on the perfusion tube body.

[0008] Optionally, the drainage tube body and the perfusion tube body extend in the same direction and their outer walls are arranged in close contact with each other.

[0009] Optionally, the perfusion tube body is sleeved on the outside of the drainage tube body, and an accommodating space is provided between the perfusion tube body and the drainage tube body.

[0010] Optionally, the drainage tube body and the perfusion tube body are connected to the first connecting pipeline and the second connecting pipeline through a catheter joint.

[0011] Optionally, the catheter connector is configured as a Y-shaped connector, comprising an infusion interface, a drainage interface, and a coupling interface, and the tail ends of the infusion tube body and the drainage tube body are connected to the coupling interface;

[0012] The interior of the combined interface is divided into a drainage cavity and an irrigation cavity. The drainage tube body is connected to the first connecting pipeline through the drainage cavity; the irrigation tube body is connected to the second connecting pipeline through the irrigation cavity.

[0013] Optionally, a accommodating groove for accommodating the battery assembly is provided on the side wall of the bracket body, and the battery assembly includes a plurality of battery modules.

[0014] Optionally, the number of the battery modules is 2.

[0015] Optionally, the plurality of perfusion ports are provided as a brachiocephalic trunk perfusion port and a lower limb perfusion port, the brachiocephalic trunk perfusion port is spaced apart from the lower limb perfusion port, and the brachiocephalic trunk perfusion port is provided at the head end of the perfusion tube body.

[0016] Optionally, the outer wall of the perfusion tube body and / or the drainage tube body is smoothed.

[0017] Optionally, the injection port gradually becomes smaller from the inside to the outside of the injection tube body, and the connection parts between the ports on both sides of the injection port and the injection tube body are in an arc transition.

[0018] Compared with the existing technology, the beneficial effects of the present application are: the present application draws out the blood from the left atrium by setting a drainage tube body and then uses the perfusion tube body to perfuse the drawn blood from the centrifugal pump into the artery, thereby reducing the heart load; and by setting the bracket body and battery assembly, the blood extracorporeal circulation device can achieve lightweight and portable effects in in-hospital emergency treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 is a schematic diagram of the structure of this application;

[0022] FIG2 is a schematic diagram of the exploded structure of FIG1 of the present application;

[0023] FIG3 is a schematic structural diagram of the bracket body, battery assembly and centrifugal pump of the present application;

[0024] FIG4 is a schematic structural diagram of the in vivo catheter and the catheter connector of the present application.

[0025] Among them, 1-bracket body; 2-battery assembly; 3-centrifugal pump; 4-first connecting pipeline; 5-second connecting pipeline; 6-drainage tube body; 7-perfusion tube body; 8-catheter connector; 81-perfusion interface; 82-drainage interface; 83-combination interface; 831-drainage cavity; 832-perfusion cavity; 9-battery module; 10-perfusion port; 101-brachiocephalic trunk perfusion port; 102-lower limb perfusion port. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0027] In the description of this application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present application, not all of the embodiments.

[0030] Existing left ventricular assist devices have many limitations in their use in in-hospital emergency care, such as poor portability. In-hospital emergency care refers to the rescue of patients in in-hospital environments such as emergency rooms, outpatient clinics, ICUs, and wards. In-hospital emergency care requires that the left ventricular assist device be implanted quickly and conveniently. The ideal implantation method is through a single femoral artery access. In addition, the device should be lightweight, easy to move, and able to work for a long time without an external power supply. However, current mainstream products cannot meet the above requirements.

[0031] Based on this, an embodiment of the present application provides a left ventricular assist device, which draws blood from the left atrium by setting a drainage tube and then uses a perfusion tube to perfuse the drawn blood from a centrifugal pump into the artery, thereby reducing the load on the heart; and by setting a stent body and a battery assembly, the extracorporeal blood circulation device can achieve lightweight and portable effects during in-hospital emergency treatment.

[0032] The left ventricular assist device is described in detail below through specific embodiments:

[0033] Referring to Figures 1 to 4, the present application provides a left ventricular assist device, including a stent body 1, a battery assembly 2, and a blood circulation device. The main function of the stent body 1 is to integrate the battery assembly 2 and the blood circulation device to achieve the convenience of the present application. The blood circulation device and battery assembly 2 of the present application are arranged on the stent body 1. Specifically, the blood circulation device is arranged on the top of the stent body 1. The battery assembly 2 is connected to the blood circulation device inside the stent body 1 to provide power to the blood circulation device so that it can start and operate normally.

[0034] Specifically, the extracorporeal blood circulation device includes a centrifugal pump 3, a first connecting line 4, a second connecting line 5, and an in-vivo catheter, wherein the centrifugal pump 3 is connected to the stent body 1. As shown in FIG2 , the centrifugal pump 3 is disposed in a mounting groove of the stent body 1. The specific form of the mounting groove is determined by the shape of the centrifugal pump 3. The in-vivo catheter of the present application is an implanted component for perfusing and extracting blood, and includes a drainage tube 6 and a perfusion tube 7. The drainage tube 6 of the present application is connected to the inlet of the centrifugal pump 3 through the first connecting line 4, and the perfusion tube 7 is connected to the outlet of the centrifugal pump 3 through the second connecting line 5. The perfusion tube 7 is provided with a plurality of perfusion ports 10. It is understandable that one end of the perfusion tube 7 is connected to the second connecting line 5, and the other end can be sealed so that only the perfusion port 10 is used for perfusion of blood, or it can be open so that blood can flow into the artery from the perfusion port 10 or from the open port. Then the tail end of the drainage tube body 6 and the head end connected to the first connecting line 4 should be provided with a drainage port capable of drawing blood so as to satisfy the requirement of draining the blood into the centrifugal pump 3. Furthermore, the head end of the drainage tube body 6 is a puncture end. Although it does not directly perform extracorporeal puncture, its head end will directly contact the blood vessel. Therefore, the head end of the drainage tube body 6 can be rounded to avoid damaging the arterial blood vessel. Furthermore, the outer wall of the perfusion tube body 7 and the drainage tube body 6 is smoothed. In some embodiments, because the end of the drainage tube body 6 needs to cross the aortic valve and enter the left ventricle to draw blood out through the action of the centrifugal pump 3, the length of the drainage tube body 6 in this embodiment is longer than the perfusion tube body 7. Preferably, the material of the drainage tube body 6 and the perfusion tube body 7 is selected from blood-compatible materials so that blood will not coagulate on the walls of the drainage tube body 6 and the perfusion tube body 7. The blood-compatible material is only used as an example for explanation and is not limited to this type of blood-compatible material. For example, TPU (medical polyurethane) can also ensure blood compatibility.

[0035] This embodiment discloses the specific arrangement of the drainage tube body 6 and the perfusion tube body 7. The drainage tube body 6 and the perfusion tube body 7 of this application extend in the same direction and their outer walls are fitted together. That is, as shown in Figures 1, 2, and 4, the two tubes are arranged side by side and partially connected and pasted together. A more sophisticated manufacturing method is to set one tube body to be divided into two chambers. In order to meet the connection requirements, the tail ends of the drainage tube body 6 and the perfusion tube body 7 arranged together can be forked to facilitate connection with the first connecting line 4 and the second connecting line 5. The connection method can be an integrally formed connection or a detachable connection. This application specifically uses a detachable connection method.

[0036] In the second embodiment, the drainage tube 6 and the perfusion tube 7 are specifically arranged such that the perfusion tube 7 is sheathed over the drainage tube 6, with a space provided between the perfusion tube 7 and the drainage tube 6. Specifically, the inner diameter of the perfusion tube 7 is larger than the outer diameter of the drainage tube 6. This arrangement can further reduce the size of the catheter in the body, facilitating operation and minimizing the risk of vascular damage.

[0037] In a preferred embodiment, the drainage tube body 6 and the perfusion tube body 7 of the present application are connected to the first connecting line 4 and the second connecting line 5 through a catheter connector 8, which can better facilitate the maintenance and replacement of individual components. Preferably, the catheter connector 8 is configured as a Y-shaped connector, as shown in FIG4 , which includes a perfusion interface 81, a drainage interface 82, and a coupling interface 83. The tail ends of the perfusion tube body 7 and the drainage tube body 6 are connected to the coupling interface 83. The coupling interface 83 internally distinguishes the drainage cavity 831 and the perfusion cavity 832. The drainage tube body 6 is connected to the first connecting line 4 through the drainage cavity 831; the perfusion tube body 7 is connected to the second connecting line 5 through the perfusion cavity 832. The light guide connector 8 in this embodiment can adapt to the embodiment of the specific setting method of the two drainage tube bodies 6 and the perfusion tube body 7 mentioned above. The specific connection method is a conventional solution in this field and will not be repeated.

[0038] In some embodiments, as shown in FIG2 , the side wall of the bracket body 1 of the present application is provided with a receiving slot for accommodating the battery assembly 2, and the battery assembly 2 includes multiple battery modules 9. Preferably, two battery modules 9 are provided so that they can be charged alternately to meet long-term use.

[0039] In some embodiments, the multiple perfusion ports 10 of the present application are configured as a brachiocephalic trunk perfusion port 101 and a lower limb perfusion port 102. The brachiocephalic trunk perfusion port 101 is spaced apart from the lower limb perfusion port 102, and the brachiocephalic trunk perfusion port 101 is disposed at the head end of the perfusion tube body 7. They are configured based on the anatomical structure of the human artery. Specifically, three perfusion ports 10 are provided in each of the two groups. The aperture of the perfusion port 10 should also be avoided from being too large or too small. If the aperture is too small, the blood flow rate will be accelerated and the blood vessels may be damaged. If the aperture is too large, more blood may be exposed after passing through the lower limb perfusion port 102, thereby reducing the amount of blood in the brachiocephalic trunk perfusion port 101.

[0040] In a preferred embodiment, the perfusion port 10 of the present application gradually becomes smaller from the inside to the outside of the perfusion tube 7, with a cross-section becoming trapezoidal, and the connection between the ports on both sides of the perfusion port 10 and the perfusion tube 7 is formed into an arc transition. According to the perfusion speed requirement of 2-4 l / min, the perfusion pressure is relatively high, and the funnel-shaped opening of the perfusion port 10 in the inner arm portion of the perfusion tube 7 will inevitably cause blood to enter the perfusion port 10. If the opening is flat, then when the perfusion pressure increases, the amount of blood entering the perfusion port 10 will decrease, thereby reducing the perfusion effect. Secondly, during the perfusion process, the blood may be affected by some resistance and be damaged. In the present application, the connection between the ports (openings) on both sides of the perfusion port 10 and the perfusion tube 7 is formed into an arc transition to prevent the straight-through edge of the opening from damaging the blood during blood flow.

[0041] It should be noted that, in this document, relational terms such as "first connecting pipeline" and "second connecting pipeline" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "includes a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0042] The foregoing description is intended only to provide specific embodiments of the present application, which will enable those skilled in the art to understand and implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A left ventricular assist device, comprising a support body (1), a battery assembly (2) and a blood circulation device, wherein the blood circulation device and the battery assembly (2) are arranged on the support body (1), and the battery assembly (2) is connected to the blood circulation device, wherein: The blood extracirculation device comprises a centrifugal pump (3), a first connecting pipeline (4), a second connecting pipeline (5) and an in-vivo catheter, wherein the in-vivo catheter comprises a drainage tube body (6) and a perfusion tube body (7), wherein the drainage tube body (6) is connected to an inlet of the centrifugal pump (3) via the first connecting pipeline (4), and the perfusion tube body (7) is connected to an outlet of the centrifugal pump (3) via the second connecting pipeline (5), and a plurality of perfusion ports (10) are provided on the perfusion tube body (7).

2. The left ventricular assist device according to claim 1, wherein: The drainage tube body (6) and the perfusion tube body (7) extend in the same direction and their outer walls are arranged in close contact with each other.

3. The left ventricular assist device according to claim 1, wherein: The perfusion tube body (7) is sleeved on the outside of the drainage tube body (6), and an accommodating space is provided between the perfusion tube body (7) and the drainage tube body (6).

4. The left ventricular assist device according to claim 1, wherein: The drainage tube body (6) and the perfusion tube body (7) are connected to the first connecting pipeline (4) and the second connecting pipeline (5) via a catheter joint (8).

5. The left ventricular assist device according to claim 4, wherein: The catheter joint (8) is configured as a Y-shaped joint, comprising an infusion interface (81), a drainage interface (82) and a combination interface (83), and the tail ends of the infusion tube body (7) and the drainage tube body (6) are connected to the combination interface (83); The combination interface (83) internally distinguishes between a drainage cavity (831) and an irrigation cavity (832); the drainage tube body (6) is connected to the first connecting pipeline (4) through the drainage cavity (831); and the irrigation tube body (7) is connected to the second connecting pipeline (5) through the irrigation cavity (832).

6. The left ventricular assist device according to claim 1, wherein: A receiving groove for receiving the battery assembly (2) is provided on the side wall of the bracket body (1); the battery assembly (2) comprises a plurality of battery modules (9).

7. The left ventricular assist device according to claim 6, wherein: The number of the battery modules (9) is two.

8. The left ventricular assist device according to claim 1, wherein: The plurality of perfusion ports (10) are arranged as a brachiocephalic trunk perfusion port (101) and a lower limb perfusion port (102); the brachiocephalic trunk perfusion port (101) and the lower limb perfusion port (102) are arranged at intervals, and the brachiocephalic trunk perfusion port (101) is arranged at the head end of the perfusion tube body (7).

9. The left ventricular assist device according to claim 1, wherein: The outer wall of the perfusion tube body (7) and / or the drainage tube body (6) is smoothed.

10. The left ventricular assist device according to any one of claims 1 to 9, wherein: The injection port (10) gradually becomes smaller from the inside to the outside of the injection tube body (7), and the connection parts between the ports on both sides of the injection port (10) and the injection tube body (7) are in an arc transition.

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