Blood pump outlet hose connecting structure

Abstract

A blood pump outlet hose (1) connecting structure, comprising an artificial blood vessel (2). A reinforcing sleeve (3) is sleeved on the artificial blood vessel (2), a clamping ring (4) being arranged between the reinforcing sleeve (3) and the artificial blood vessel (2), and the clamping ring (4) and the reinforcing sleeve (3) being in snap fastening connection by means of a locking ring (5). The front end of the reinforcing sleeve (3) protrudes towards an outer ring to form a protruding ring (31), ports of the protruding ring (31) being provided with locking openings (311), the surface of the protruding ring (31) being provided with engagement slots (312), and the engagement slots (312) and the locking openings (311) being arranged alternately. One end of the clamping ring (4) is provided with locking notches (41) corresponding to the locking openings (311) on the reinforcing sleeve (3), and the outer ring of the other end of the clamping ring (4) is provided with threads (42), the threads (42) being symmetrically provided with flush sections (421).

Description

Blood pump outlet pipe connection structure

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 15, 2023, with application number 202311723711.7 and invention name “Blood Pump Outlet Tube 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 pipe connection structure. Background Art

[0003] The left ventricular assist device, also known as an artificial blood pump, is used to pump blood from the ventricle into the arterial system by simulating the function of ventricular blood transfusion, thereby partially or completely replacing the function of the heart. The main principle is that after the blood is pumped by the blood pump, it is transported to the artery through an artificial blood vessel - a reinforced cannula. The artificial blood vessel is responsible for transporting blood, and the reinforced cannula protects the blood vessel to prevent deformation or even collapse of the blood vessel due to squeezing of human tissue, which affects the normal blood delivery. The connection between the blood pump outlet tube and the artificial blood vessel - the reinforced cannula is connected through a unique structure.

[0004] As the name suggests, an artificial heart needs to be placed within the human chest cavity. However, the human chest cavity has limited space, so the overall size of the artificial blood pump must be considered. If it is too large, it can easily squeeze the heart or surrounding tissues, increasing the probability of postoperative complications. During operation, the doctor must assemble the artificial blood vessel and other components, such as the reinforcement sleeve, onto the blood pump outlet tube during surgery. Therefore, the structural reliability and ease of operation at this location are particularly important. However, existing structures are relatively cumbersome to install. Typically, the braided artificial blood vessel sleeve must be placed on the blood pump outlet tube and then tightened with other fastening components. External tools are also required throughout the entire operation to ensure stability after assembly. Existing structures also cannot provide the doctor with a reliable indication of proper installation. Therefore, improper installation is prone to occur, which inadvertently increases the doctor's surgical time. Furthermore, improper installation due to the complex installation process can also cause unnecessary bleeding, which is harmful to the patient. Therefore, how to quickly and effectively connect the artificial blood pump and the artificial blood vessel has become a pressing technical problem. Summary of the Invention

[0005] In order to address the deficiencies of the prior art, the present invention proposes a blood pump outlet tube connection structure, which has a compact overall structure, is easy and quick to operate, and can effectively save surgical time.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The blood pump outlet pipe connection structure includes an artificial blood vessel for being placed outside the blood pump outlet pipe, a reinforcing sleeve is placed on the artificial blood vessel, a clamping ring is provided between the reinforcing sleeve and the artificial blood vessel, and a locking ring is used to realize a locking connection between the clamping ring and the reinforcing sleeve.

[0008] Preferably, the front end of the reinforcing sleeve is protruded toward the outer circle to form a convex ring, the convex ring ports are evenly provided with locking openings, the surface of the convex ring is provided with a clamping groove, and the clamping groove is spaced apart from the locking opening.

[0009] Preferably, one end of the clamping ring is provided with a locking groove corresponding to the locking groove on the reinforcing sleeve, and the other end of the clamping ring is processed with a thread on the outer ring, and a group of flush sections are symmetrically arranged on the thread.

[0010] Preferably, an elastic opening is provided on the clamping ring, and the elastic opening is opened from one end of the clamping ring and extends in a bent shape to the other end of the clamping ring.

[0011] Preferably, the front outer ring of the artificial blood vessel is covered with a metal reinforcement ring.

[0012] Preferably, an annular groove is provided on the inner wall of the locking groove end of the clamping ring, the front end of the artificial blood vessel is placed in the annular groove, and a boss is provided inwardly at the bottom of the threaded end of the clamping ring.

[0013] Preferably, the locking ring is placed on the bottom of the convex ring of the reinforcing sleeve, and its two ends are respectively embedded in the adjacent locking openings and locking opening grooves.

[0014] Preferably, the inner wall of the port of the locking end of the reinforcing sleeve is beveled from the inside to the outside to form a slope, and the diameter of the opening at the outer end of the slope is larger than the opening at the inner end of the slope.

[0015] Preferably, the outer lower side of the locking groove end of the clamping ring is arranged in a bevel, and the bevel matches the bevel inside the reinforcing sleeve.

[0016] Preferably, a connecting ring is provided on the outside of the blood pump outlet tube, and cross sections are symmetrically provided on the connecting ring. A distance is provided between the connecting ring and the root of the blood pump outlet tube, and a group of clamping columns for matching with the lock port are symmetrically provided between the connecting ring and the root of the blood pump outlet tube.

[0017] The beneficial effects of the present invention are at least reflected in the following: the connecting structure of the present invention can be quickly assembled, allowing doctors to smoothly install the artificial blood vessel on the blood pump during surgery. The connection position with the blood pump outlet tube is also more clearly defined, making it not only easy to operate, but also safe and reliable for the entire structure, significantly reducing surgical time. It also facilitates disassembly. For example, if a patient needs to replace the blood pump, the connecting structure can be easily removed for replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram of the assembly of the connection structure of the present invention after being connected to a blood pump.

[0019] FIG2 is a schematic diagram of the structure of the connection structure and the blood pump after being disassembled according to the present invention.

[0020] FIG3 is a schematic diagram of the connection structure of the present invention.

[0021] FIG4 is a schematic diagram of the explosion structure of FIG3 of the present invention.

[0022] FIG5 is a schematic diagram of the structure of FIG3 after the explosion in another direction of the present invention.

[0023] FIG6 is a front view of FIG3 of the present invention.

[0024] FIG7 is a partial structural schematic diagram of the AA section in FIG6 . DETAILED DESCRIPTION

[0025] 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 7 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.

[0026] The present invention discloses a blood pump outlet pipe connection structure, comprising an artificial blood vessel 2 for being sleeved on the outside of a blood pump outlet pipe 1, wherein the front end outer ring of the artificial blood vessel 2 is covered with a metal reinforcement ring 21. A reinforcement sleeve 3 is sleeved on the artificial blood vessel 2, and a clamping ring 4 is provided between the reinforcement sleeve 3 and the artificial blood vessel 2, and a locking connection is achieved between the clamping ring 4 and the reinforcement sleeve 3 via a locking ring 5. The artificial blood vessel 2, the clamping ring 4, the reinforcement sleeve 3 and the locking ring 5 are assembled into an integrated structure. A connecting ring 11 is provided on the outside of the blood pump outlet pipe 1, and a distance is provided between the connecting ring 11 and the root of the blood pump outlet pipe. The connection structure of the present invention is sleeved on the connecting ring 11 to achieve an axial connection with the blood pump outlet pipe 1.

[0027] Specifically, the front end of the reinforcing sleeve 3 is formed with a protruding ring 31 protruding outward, and the ends of the protruding ring 31 are uniformly provided with locking notches 311. The surface of the protruding ring 31 is provided with locking grooves 312, which are spaced apart from the locking notches 311. The locking ring 5 is placed on the bottom of the protruding ring 31 of the reinforcing sleeve 3, with its ends selectively embedded in the adjacent locking notches 311 or locking grooves 312. When unlocked, the ends of the locking ring 5 are placed in the locking grooves 312. When locking, the ends of the locking ring 5 are removed from the locking grooves 312 and placed in the locking notches 311, connecting with the clamping ring 4 to prevent circumferential rotation between the reinforcing sleeve 3 and the clamping ring 4. Accordingly, to limit circumferential rotation with the reinforcing sleeve 3, one end of the clamping ring 4 is provided with a locking groove 41 corresponding to the locking notches 311 on the reinforcing sleeve. The locking groove 41 is also open.

[0028] The outer ring of the other end of the clamping ring 4 is machined with a thread 42 for locking. A resilient opening 43 is defined in the clamping ring 4. This opening 43 extends from one end of the clamping ring 4 in a curved shape to the other end. This resilient opening 43 allows the clamping ring 4 to be elastically expanded or contracted when under pressure. To prevent the sharp interface of the thread 42 from damaging the reinforcing sleeve 3, a set of flush sections 421 are symmetrically arranged on the thread 42.

[0029] The inner wall of the locking groove end of the clamping ring 4 is provided with an annular groove 44, and the front end of the artificial blood vessel 2 is placed in the annular groove 44. The bottom of the threaded end of the clamping ring 4 is provided with a boss 45 facing inward. When the artificial blood vessel 2 is connected to the clamping ring 4, the metal reinforcement ring 21 will first open the clamping ring 4 and place it in the annular groove 44. When the artificial blood vessel 2 is placed on the blood pump outlet tube 1, the connecting ring 11 will be placed in the annular groove 44 and abut against the metal reinforcement ring 21, completing the connection between the artificial blood vessel 2 and the blood pump outlet tube 1. To prevent circumferential rotation, the connecting ring 11 is symmetrically provided with cut surfaces 111. A set of clamping columns 12 for matching with the locking mouth are symmetrically provided between the connecting ring 11 and the root of the blood pump outlet tube, and are placed in the locking groove 41 through the clamping columns 12.

[0030] In order to further ensure the tight connection between the artificial blood vessel 2 and the blood pump outlet tube 1, and between the clamping ring 4 and the artificial blood vessel 2, and to prevent bleeding, the inner wall of the port at the locking end of the reinforcing sleeve 3 is beveled from the inside to the outside to form a slope 32, and the diameter of the outer end opening of the slope 32 is larger than the inner end opening of the slope 32.

[0031] The outer lower side of the locking groove end of the clamping ring 4 is provided with a second inclined surface 46 , and the second inclined surface 46 matches the inclined direction of the inclined surface 32 in the reinforcing sleeve 3 .

[0032] When the reinforcing sleeve 3 is rotated toward the blood pump outlet tube 1, the inclined surface 32 presses against the second inclined surface 46. Simultaneously, the presence of the elastic opening 43 facilitates the contraction of the clamping ring 4, thereby ensuring a tighter connection between the clamping ring 4 and the artificial blood vessel 2. When screwed into place, the end of the locking ring 5 is placed within the locking notch 311 and the locking notch groove 41 to achieve circumferential locking.

[0033] All components of the present invention can be quickly assembled into a complete unit. Before shipment, the artificial blood vessel is sterilized and assembled with the clamping ring 4 and reinforcing sleeve 3. During use, the physician simply inserts the assembled product directly into the connecting ring 11 of the artificial blood pump outlet tube to connect the artificial blood vessel to the blood pump outlet tube. This significantly reduces the physician's installation workload and complexity, thus saving surgical time and eliminating errors caused by insertion length differences with the blood pump outlet tube 1.

[0034] 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.

[0035] 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 pipe connection structure, characterized in that: It comprises an artificial blood vessel (2) for being sleeved outside a blood pump outlet tube (1), a reinforcing sleeve (3) being sleeved on the artificial blood vessel (2), a clamping ring (4) being arranged between the reinforcing sleeve (3) and the artificial blood vessel (2), and a locking ring (5) being used to realize a locking connection between the clamping ring (4) and the reinforcing sleeve (3); The front end of the reinforcing sleeve (3) is convexly provided with a convex ring (31) toward the outer circle, the end of the convex ring (31) is evenly provided with locking openings (311), the surface of the convex ring (31) is provided with a clamping groove (312), and the clamping groove (312) is spaced apart from the locking opening (311); One end of the clamping ring (4) is provided with a locking groove (41) corresponding to the locking groove (311) on the reinforcing sleeve, and the other end of the clamping ring (4) is processed with a thread (42) on the outer ring, and a group of flush sections (421) are symmetrically arranged on the thread (42); The clamping ring (4) is provided with an elastic opening (43), and the elastic opening (43) is opened from one end of the clamping ring (4) and extends in a bent shape to the other end of the clamping ring (4); The front end outer ring of the artificial blood vessel (2) is coated with a metal reinforcement ring (21); The inner wall of the locking groove end of the clamping ring (4) is provided with an annular groove (44), the front end of the artificial blood vessel (2) is placed in the annular groove (44), and the bottom of the threaded end of the clamping ring (4) is provided with a boss (45) facing inward; The locking ring (5) is sleeved on the bottom of the convex ring (31) of the reinforcing sleeve (3), and its two ends are respectively embedded in the adjacent locking openings (311) and locking opening grooves (41).

2. The blood pump outlet pipe connection structure according to claim 1, characterized in that: The inner wall of the port of the locking end of the reinforcing sleeve (3) is cut obliquely from the inside to the outside to form an inclined surface, and the diameter of the opening at the outer end of the inclined surface is larger than the opening at the inner end of the inclined surface.

3. The blood pump outlet pipe connection structure according to claim 2, characterized in that: The outer lower side of the locking groove end of the clamping ring (4) is arranged in a sloped surface, and the sloped surface matches the sloped surface inside the reinforcing sleeve (3).

4. The blood pump outlet pipe connection structure according to claim 3, characterized in that: The blood pump outlet tube (1) is provided with a connecting ring (11) protruding outwardly, and the connecting ring (11) is symmetrically provided with cut surfaces (111), a distance is provided between the connecting ring (11) and the root of the blood pump outlet tube, and a group of clamping columns (12) for matching with the locking port are symmetrically provided between the connecting ring (11) and the root of the blood pump outlet tube.

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