Blood pump outlet connection structure

Abstract

A blood pump outlet connection structure, comprising an artificial blood vessel (1). One end of the artificial blood vessel (1) is clamped to a blood pump outlet pipe (6) by means of a locking ring (5). A boss (7) for being connected to the locking ring (5) is arranged on the blood pump outlet pipe (6). A first crimping ring (2) is sleeved on one end of the artificial blood vessel (1). A sealing ring (3) is arranged between the first crimping ring (2) and the artificial blood vessel (1). A second crimping ring (4) is sleeved on the first crimping ring (2). The locking ring (5) is sleeved on the first crimping ring (2) and the second crimping ring (4) and is connected to the blood pump outlet pipe (6). According to the structure, the artificial blood vessel (1), the crimping rings (2, 4), and the like are taken as a whole to be assembled and sterilized in advance in the factory, so that a doctor can directly operate in one step by means of the locking ring (5) during surgery to smoothly and quickly mount the artificial blood vessel on a blood pump, without the need for external tools. The connection structure is safe and reliable, thereby saving the operation time to a great extent.

Description

A blood pump outlet connection structure

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 7, 2023, with application number 202311666647.3 and invention name “A blood pump outlet connection structure”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention belongs to the technical field of medical devices, and in particular relates to a blood pump outlet connection structure. Background Art

[0003] A left ventricular assist device, also known as an artificial blood pump, simulates the function of ventricular blood transfusion, pumping ventricular blood into the arterial system, partially or completely replacing heart function. This device is known as an artificial heart. The blood pump then delivers it to the arteries through an artificial blood vessel—a reinforced cannula. The artificial blood vessel is responsible for blood transport, while the reinforced cannula protects the vessel from deformation or even collapse due to compression from human tissue, which could affect normal blood flow. The blood pump outlet tube and the artificial blood vessel—the reinforced cannula—are connected via a unique structural connection.

[0004] Since the artificial blood pump is placed in the human body, in order to avoid squeezing the heart or surrounding tissues and causing unnecessary postoperative complications, the overall size of the blood pump needs to be small.

[0005] When doctors use the existing technology, they need to first put the artificial blood vessel on the blood pump outlet tube, and then tighten the artificial blood vessel with other structures. Due to the material limitations of the artificial blood vessel, the artificial blood vessel needs to be tightly fitted with the blood pump outlet tube through interference, which invisibly increases the difficulty of the doctor's operation. Generally, it needs to use external tools, which prolongs the entire operation time. At the same time, after the existing structure is assembled, it is not possible to judge whether it is assembled in place, which easily leads to the risk of falling off or bleeding. Therefore, how to achieve a quick connection between the blood pump and the artificial blood vessel in a limited space has become a technical problem that needs to be solved. Summary of the Invention

[0006] In order to address the deficiencies of the prior art, the present invention proposes a blood pump outlet connection structure with a compact overall structure. During actual use, doctors can quickly connect the artificial blood vessel to the blood pump outlet tube, thereby effectively saving operation time.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A blood pump outlet connection structure includes an artificial blood vessel, one end of which is clamped to a blood pump outlet tube via a locking ring, and a boss for connecting to the locking ring is provided on the blood pump outlet tube;

[0009] A first crimping ring is sleeved on one end of the artificial blood vessel, a sealing ring is provided between the first crimping ring and the artificial blood vessel, a second crimping ring is sleeved on the first crimping ring, and the locking ring is sleeved on the first crimping ring and the second crimping ring and connected to the blood pump outlet tube.

[0010] One end of the artificial blood vessel is provided with an outwardly folded flange bend portion, one end of the first crimping ring is inserted into the flange bend portion, and the other end is concave to form an annular groove, and the sealing ring is placed in the annular groove.

[0011] Preferably, the insertion end surface of the first crimping ring is provided with an inverted groove.

[0012] Preferably, the second crimping ring is placed on the flange bending part of the artificial blood vessel to press the artificial blood vessel and the inserted end of the first crimping ring. The cross-section of the second crimping ring is L-shaped, one end of which presses the flange of the flange bending part, and the other end abuts against the port of the artificial blood vessel, so that the artificial blood vessel, the sealing ring, the first crimping ring and the second crimping ring are integrated.

[0013] Preferably, a strip-shaped locking groove is provided at one end of the locking ring, and the locking groove is provided with a notch for the boss to enter. A locking spring is provided in the locking groove, and the locking spring extends from the middle of one side of the locking groove through the notch to the other side, dividing the locking groove into front and rear sides, and the notch is provided on the front side.

[0014] Preferably, the distal end of the locking spring is a bent end, the bent end is inclinedly bent from the front side to the rear side, and the distance between the proximal end of the bent end and the front side is smaller than the diameter of the boss.

[0015] The beneficial effects of the present invention are at least reflected in the following: the structure of the present invention combines the artificial blood vessel, crimping ring, etc. as a whole, which is assembled and sterilized in advance in the factory, so that the doctor can directly install the artificial blood vessel on the blood pump in one step through the locking ring during the operation without the need for external tools. The connection structure of the present invention is safe and reliable, and greatly saves operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic structural diagram of the connection structure of the present invention after being connected to a blood pump.

[0017] FIG2 is a schematic diagram of the explosion structure of FIG1 of the present invention.

[0018] FIG3 is a schematic structural diagram of the locking ring of the present invention.

[0019] FIG4 is a schematic diagram illustrating the connection structure after connection with the boss alone.

[0020] FIG5 is a schematic diagram of the structure of the rear portion of the AA section in FIG4 . DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to Figures 1 to 5 and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] The present invention discloses a blood pump outlet connection structure comprising an artificial blood vessel 1, one end of which is engaged with a blood pump outlet tube 6 via a locking ring 5. The blood pump outlet tube 6 is provided with a boss 7 for connection to the locking ring 5. In this embodiment, the boss 7 is positioned on a collar, which is welded to the outside of the blood pump outlet tube 6. Two bosses 7 are provided protruding from the collar.

[0023] A first crimping ring 2 is sleeved on one end of the artificial blood vessel 1, a sealing ring 3 is arranged between the first crimping ring 2 and the artificial blood vessel 1, a second crimping ring 4 is sleeved on the first crimping ring 2, and the locking ring 5 is sleeved on the first crimping ring 2 and the second crimping ring 4 and connected to the blood pump outlet tube 6.

[0024] Specifically, one end of the artificial blood vessel 1 is provided with an outwardly folded bend 11. One end of the first crimping ring 2 is inserted into the bend 11, and the other end is recessed to form an annular groove. The sealing ring 3 is placed in the annular groove, further ensuring the seal between the first crimping ring 2 and the artificial blood vessel 1. To enhance the tightness of the connection, the surface of the inserted end of the first crimping ring 2 is provided with an inverted groove 21.

[0025] The second crimping ring 4 is placed on the flange bending part 11 of the artificial blood vessel 1 to press the artificial blood vessel 1 and the inserted end of the first crimping ring 2. The cross-section of the second crimping ring 4 is L-shaped, one end of which presses the flange 111 of the flange bending part 11, and the other end abuts against the port of the artificial blood vessel 1, so that the artificial blood vessel 1, the sealing ring 3, the first crimping ring 2 and the second crimping ring 4 are integrated.

[0026] A strip-shaped locking groove 51 is provided at one end of the locking ring 5. The locking groove 51 is provided with a notch 511 for the boss to enter. A locking spring 52 is provided in the locking groove 51. The locking spring 52 extends from the middle of one side of the locking groove 51 through the notch 511 to the other side, dividing the locking groove 51 into front and rear sides, and the notch 511 is provided on the front side.

[0027] The distal end of the locking spring 52 is a bent end 521 , which is bent obliquely from the front side to the rear side. The distance between the proximal end of the bent end 521 and the front side is smaller than the diameter of the boss 7 .

[0028] When the locking ring 5 is connected to the boss, the boss 7 will first enter the front side of the locking groove 51 through the notch 511. When the locking ring 5 is rotated, the boss 7 will enter one side of the locking groove 51 and enter the distal end of the locking spring 52. When passing the distal end of the locking spring, it will squeeze the locking spring and finally smoothly enter the distal end gap between the bent end 521 and the front side of the locking groove 51. When there is no force on the gap, the space is smaller than the cross section of the boss 7 to ensure locking. The entire operation is convenient and quick during assembly, and the force required is also small, without the need for tools. Since the artificial blood vessel is made of woven material, if it is rotated circumferentially during use, it will cause it to knot, thereby affecting blood flow and easily causing thrombosis. In order to avoid circumferential rotation of the artificial blood vessel, the present invention also limits the bending direction of the bent end 521 so that the locking spring 52 and the boss 7 will not axially delaminate or circumferentially rotate.

[0029] The first crimping ring 2, second crimping ring 4, and sealing ring 3 are assembled integrally with the artificial blood vessel at the factory. When in use, the doctor simply slips the locking ring 5 over the boss 7 of the blood pump outlet tube 6 and rotates it to complete the installation. This significantly reduces the doctor's installation workload and complexity, thus saving surgical time.

[0030] Finally, it should be noted that terms such as "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate positions or relationships based on the positions or relationships shown in the accompanying drawings. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A blood pump outlet connection structure, characterized in that: It comprises an artificial blood vessel (1), one end of which is clamped with a blood pump outlet pipe (6) via a locking ring (5), and the blood pump outlet pipe (6) is provided with a boss (7) for connecting with the locking ring (5); A first crimping ring (2) is sleeved on one end of the artificial blood vessel (1), a sealing ring (3) is provided between the first crimping ring (2) and the artificial blood vessel (1), a second crimping ring (4) is sleeved on the first crimping ring (2), and the locking ring (5) is sleeved on the first crimping ring (2) and the second crimping ring (4) and connected to the blood pump outlet tube (6); One end of the artificial blood vessel (1) is provided with a flanged bend (11) folded outward, one end of the first crimping ring (2) is inserted into the flanged bend (11), and the other end is concave to form an annular groove, and the sealing ring (3) is placed in the annular groove; the second crimping ring (4) is sleeved on the flanged bend (11) of the artificial blood vessel (1) to press the artificial blood vessel (1) and the inserted end of the first crimping ring (2), the cross section of the second crimping ring (4) is L-shaped, one end of which presses the flange (111) of the flanged bend (11), and the other end abuts against the port of the artificial blood vessel (1), so that the artificial blood vessel (1), the sealing ring (3), the first crimping ring (2) and the second crimping ring (4) are integrated.

2. A blood pump outlet connection structure according to claim 1, characterized in that: The insertion end surface of the first crimping ring (2) is provided with a reverse groove (21).

3. A blood pump outlet connection structure as claimed in claim 2, characterized in that: A strip-shaped locking groove (51) is provided at one end of the locking ring (5), and a notch (511) is provided in the locking groove (51) for the boss to enter. A locking spring piece (52) is provided in the locking groove (51), and the locking spring piece (52) extends from the middle of one side of the locking groove (51) through the notch (511) to the other side, dividing the locking groove (51) into a front side and a rear side, and the notch (511) is provided on the front side.

4. A blood pump outlet connection structure as claimed in claim 3, characterized in that: The distal end of the locking spring sheet (52) is a bent end (521), the bent end (521) is bent obliquely from the front side to the rear side, and the distance between the proximal end of the bent end (521) and the front side is smaller than the diameter of the boss (7).

Images