Flexible membrane armature-driven blood pump

Abstract

This invention discloses a flexible membrane armature-driven blood pump. The technical solution is as follows: It includes a pump body and an inlet and outlet joints communicating with the pump body, to which a hose is connected by a fastening mechanism to either end of the inlet or outlet joint, the fastening assembly includes an engagement groove opened in the inlet joint, several pressing grooves communicating with the engagement groove are opened on the surface of the inlet joint, a first position regulating ring and a second position regulating ring are fixedly connected to the outside of the inlet joint, and a male thread is provided between the first position regulating ring and the second position regulating ring in the inlet joint. The technical effect is as follows: Through the cooperation of the movable tube and the male thread, the problem of poor stability between the hose and joints is solved, which is the case with conventional artificial blood pumps where there is no fastening mechanism for fastening a hose to either the inlet or outlet joint, and when connecting a hose, the hose can only be attached to the two joints by elasticity.

Description

Technical Field

[0001] The present invention relates to the field of medical device technology, and particularly to an armature-driven blood pump with a flexible membrane.

Background Art

[0002] Currently, the number of heart failure patients in China is increasing year by year. As one of the effective means for treating end-stage heart failure, a mechanical ventricular assist device is manually implanted, and mainly a left ventricular assist device is used. However, many existing left ventricular assist devices are large in size and need to be implanted through invasive and high-risk surgeries, so they are usually limited to end-stage heart failure patients. For heart failure patients who have not reached the end stage, it is conceivable to avoid these problems by implanting a relatively small pump and reducing the incidence during the surgical period. However, clinically applicable standard blood pumps are mainly divided into axial flow pumps and centrifugal pumps, both of which are rotary pumps. The high-speed rotation of their rotors damages blood components and causes complications such as hemolysis, thrombosis, and bleeding. In addition, since they operate at a single pump speed, they reduce the patient's pulse pressure during clinical use, resulting in complications related to continuous non-physiological blood pumping, such as gastrointestinal bleeding, aortic valve insufficiency, or stroke. Therefore, researchers are developing a pulsation algorithm for such rotary pumps to reduce the formation of thrombus and the like by improving the washing effect.

[0003] During the use of conventional artificial blood pumps, there is no fastening mechanism for fastening a hose to either the inlet joint or the outlet joint in the conventional artificial blood pump. When connecting the hose, the hose can only be attached to the two joints by elasticity, and the stability between the hose and the joint is poor. Therefore, it is necessary to design an armature-driven blood pump with a flexible membrane applicable to the field of conventional artificial blood pumps.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention aims to provide a flexible membrane armature-driven blood pump that has the advantage of solving the problem in conventional artificial blood pumps where, through the cooperation of a movable tube and a male screw, there is no fastening mechanism for fastening a hose to either the inlet or outlet joint, and when connecting a hose, the hose can only be attached to the two joints by elasticity, resulting in poor stability between the hose and the joint. [Means for solving the problem]

[0005] The above technical objectives of the present invention are realized by the following technical solution: A flexible membrane armature-driven blood pump comprising a pump body and an inlet joint and an outlet joint communicating with the pump body, wherein hoses are connected to the ends of both the inlet joint and the outlet joint via a fastening mechanism, the fastening assembly includes an engagement groove opened in the inlet joint, several pressing grooves communicating with the engagement groove are opened on the surface of the inlet joint, a first position regulating ring and a second position regulating ring are fixedly connected to the outside of the inlet joint, a male screw is provided between the first position regulating ring and the second position regulating ring in the inlet joint, a lumen is opened inside the inlet joint, and several mounting parts are provided inside the lumen A pipe is provided, an insertion rod is movably connected to one end of the mounting pipe, an operation panel is movably connected to the other end of the insertion rod away from the mounting pipe, a clamping mechanism is provided in the inlet joint, the clamping mechanism includes an adjustment spring connected to the mounting pipe and the insertion rod, both ends of the adjustment spring are connected to the operation panel and the lumen, respectively, and a movable tube is attached to the operation panel, one end of the movable tube movably passes through an engagement groove, several connection blocks are fixedly connected to the movable tube, a fixed block is connected to the end of the connection block near the inlet joint, and a pressing mechanism is provided in the fixed block.

[0006] The present invention further includes, in the pressing mechanism, an arrangement groove opened in a fixed block, a guide bar sliding in contact with the arrangement groove, an engagement block connected to one end of the guide bar, an arc-shaped block provided at the other end of the guide bar away from the engagement block, and several expansion and contraction springs fixedly connected between the arc-shaped block and the fixed block.

[0007] The present invention further provides an adjustment mechanism to the inlet joint, the adjustment mechanism including a threaded sleeve that is screwed onto a male thread, the threaded sleeve being located between a first position regulating ring and a second position regulating ring, a connecting plate being connected to one end of the threaded sleeve, a connecting pipe being fixedly connected to the connecting plate, several connecting rods being provided on the connecting plate, a mounting rod being connected to one end of each connecting rod away from the connecting plate, and a pusher tube being connected to the other end of each mounting rod away from the connecting rods.

[0008] The present invention further comprises a configuration in which the connecting rod is located outside the second position regulating ring, and the mounting rod is located on one side of the second position regulating ring.

[0009] The present invention further provides a traction mechanism to the inlet joint, the traction mechanism includes movable openings symmetrically opened in the connecting pipe, a mounting block is symmetrically fixed and connected to the outside of the connecting pipe, an insertion groove is opened at one end of the mounting block, and a first engagement hole and a second engagement hole communicating with the insertion groove are opened on the surface of the mounting block.

[0010] The present invention further includes an insertion block connected to an insertion groove, a guide block provided at one end of the insertion block, the guide block being movably mounted corresponding to a movable opening, an extension pipe connected to both of the guide blocks, and the extension pipe being located between the pusher tube and the connecting pipe.

[0011] The present invention further includes an internally convex ring fixedly connected to the inner wall of the extension tube, an operating chamber provided inside the insertion block, an elastic spring fixedly connected to the operating chamber, a push plate provided at one end of the elastic spring, an extension button attached to the push plate, and the extension button connected to the insertion block so as to pass through. [Effects of the Invention]

[0012] The beneficial effects of this invention are as follows:

[0013] 1. In this invention, when a hose is attached to the inlet and outlet fittings, one end of the hose is positioned in the engagement groove, and the threaded sleeve rotates on the male thread. As a result, the pusher tube on the mounting rod rotates and moves due to the connecting rod, and the pusher tube can press to move the connecting block. By pressing the connecting block, the movable tube moves within the lumen, and one end of the insertion rod moves inside the mounting pipe, pulling the adjustment spring. At this time, the surface of the hose is clamped by the connecting block and the inner wall of the engagement groove, improving the convenience of operation.

[0014] 2. The present invention improves stability between the hose and the inlet fitting, and between the hose and the outlet fitting. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic diagram of the structure of the flexible membrane armature-driven blood pump of the present invention. [Figure 2]This is a schematic diagram of the fastening mechanism and pipe mounting structure of the present invention. [Figure 3] This is a schematic diagram of the fastening mechanism and pipe mounting structure of the present invention. [Figure 4] This is a schematic diagram of the exploded structure of the adjustment mechanism and clamping mechanism of the present invention. [Figure 5] This is a schematic diagram of the cross-sectional structure of the clamping mechanism of the present invention. [Figure 6] This is a schematic cross-sectional diagram of the adjustment mechanism of the present invention. [Figure 7] This is a schematic diagram of the cross-sectional structure of the traction mechanism according to the present invention. [Figure 8] This is a schematic diagram of the structure of the pressing mechanism of the present invention. [Modes for carrying out the invention]

[0016] The present invention will be described in more detail below with reference to the drawings. [Examples]

[0017] Referring to Figures 1 to 5, a flexible membrane armature-driven blood pump comprises a pump body 10 and a hose 13, an inlet fitting 11 fixedly attached to the pump body 10, an outlet fitting 12 fixedly attached to the pump body 10, the hose 13 being attached to both the inlet fitting 11 and the outlet fitting 12, an engagement groove 20 provided in both the inlet fitting 11 and the outlet fitting 12, one end of the hose 13 being located in the engagement groove 20, a plurality of pressing grooves 21 provided in both the inlet fitting 11 and the outlet fitting 12, the pressing grooves 21 being located on one side of the engagement groove 20, and the inlet fitting 11 and the outlet A first position regulating ring 22 is fixedly attached to each of the joints 12, and a second position regulating ring 70 is fixedly attached to each of the inlet joint 11 and outlet joint 12. The first position regulating ring 22, the second position regulating ring 70, and the pressing groove 21 are located on opposite sides of the engagement groove 20, respectively. A male screw 80 is fixedly attached to the inlet joint 11 and outlet joint 12, and the male screw 80 is located between the second position regulating ring 70 and the first position regulating ring 22. A lumen 50 is provided inside both the inlet joint 11 and the outlet joint 12, and multiple lumen 50 are provided in each lumen 50. A mounting pipe 51 is fixedly attached, an insertion rod 52 is movably attached to either end of the mounting pipe 51, one end of the insertion rod 52 moves inside the mounting pipe 51, an operation panel 53 is fixedly attached to either end of the insertion rod 52, an adjustment spring 60 is fixedly attached between the operation panel 53 and the lumen 50, the mounting pipe 51 and the insertion rod 52 are mounted inside the adjustment spring 60, a movable tube 61 is fixedly attached to either end of the operation panel 53, one end of the movable tube 61 movably passes through the engagement groove 20, and the movable tube 61 Multiple connection blocks 62 are fixedly attached to either of the connections, and the connection blocks 62 are located in the engagement grooves 20. A fixing block 63 is fixedly attached to one end of each connection block 62, and the fixing block 63 is located on one side of the inlet fitting 11 and the outlet fitting 12, respectively. When the hose 13 is engaged with the inlet fitting 11 and the outlet fitting 12, one end of the hose 13 is located in the engagement grooves 20, and by pressing the connection block 62, the movable pipe 61 moves within the lumen 50, and one end of the insertion rod 52 moves inside the mounting pipe 51, pulling the adjustment spring 60.At this time, by clamping the surface of the hose 13 by the connection block 62 and the inner wall of the engagement groove 20, the fixed block 63 in the connection block 62 moves toward the direction of the pressing groove 21.

[0018] Referring to FIG. 8, an arrangement groove 94 is provided in each of the fixed blocks 63, a guide bar 95 is movably mounted in each of the fixed blocks 63, one end of each guide bar 95 movably penetrates the arrangement groove 94, and an engagement block 96 that moves in the arrangement groove 94 is fixedly mounted at one end of each guide bar 95. An arcuate block 97 is fixedly connected to the other end of each guide bar 95, a telescopic spring 98 is fixedly connected between the arcuate block 97 and the fixed block 63. Until the engagement block 96 is located on one side of the pressing groove 21, the fixed block 63 in the connection block 62 moves toward the direction of the pressing groove 21. The arcuate block 97 receives a force, the guide bar 95 moves the fixed block 63, the telescopic spring 98 contracts, and the engagement block 96 presses the surface of the hose 13 against the pressing groove 21 by the guide bar 95, further improving the stability between the hose 13 and the inlet joint 11 and between the hose 13 and the outlet joint 12.

[0019] Referring to FIGS. 4 and 6, a thread sleeve 23 is screwed onto the male thread 80. The thread sleeve 23 is located between the first position regulating ring 22 and the second position regulating ring 70. A connection panel 43 is fixedly connected to one end of the thread sleeve 23, a connection pipe 30 is fixedly connected to the connection panel 43. The connection pipe 30 is located outside the second position regulating ring 70. A plurality of connection rods 71 are fixedly mounted on the connection panel 43. The connection rods 71 are located on one side of the second position regulating ring 70. A mounting slot 72 is fixedly mounted at one end of each connection rod 71. The mounting slots 72 are located on one side of the second position regulating ring 70. A pusher tube 73 is fixedly mounted at one end of the plurality of mounting slots 72. By rotating and moving the male thread 80, the pusher tube 73 in the mounting slot 72 by the connection rod 71 moves while rotating, and the connection block 62 can be moved by the pusher tube 73.

[0020] Referring to FIGS. 6 and 7, moving ports 31 are symmetrically provided so as to penetrate through the connecting pipe 30, mounting blocks 40 are symmetrically fixed and mounted on the surface of the connecting pipe 30, insertion grooves 81 are provided at either end of the mounting block 40, first engaging holes 82 communicating with the insertion grooves 81 are provided on the surface of the mounting block 40, second engaging holes 83 communicating with the insertion grooves 81 are provided on the surface of the mounting block 40, insertion blocks 33 are movably mounted in any of the insertion grooves 81, guide blocks 32 for moving the moving ports 31 are fixed and mounted at either end of the insertion block 33, an extension pipe 41 is fixed and mounted between the two guide blocks 32, the extension pipe 41 is located between the pusher tube 73 and the connecting pipe 30, an inner convex ring 42 is fixed and mounted on the inner wall of the extension pipe 41, operation chambers 90 are provided inside any of the insertion blocks 33, elastic springs 91 are fixed and mounted in any of the operation chambers 90, pressing plates 92 are fixed and mounted at either end of the elastic spring 91, expansion and contraction buttons 93 are fixed and mounted on any of the pressing plates 92, the expansion and contraction buttons 93 movably penetrate through the insertion blocks 33, and one end of the expansion and contraction button 93 is engaged with only one of the first engaging hole 82 and the second engaging hole 83. Pressing the expansion and contraction button 93 in the second engaging hole 83 contracts the elastic spring 91, the insertion block 33 moves in the insertion groove 81, and the expansion and contraction button 93 is changed to be engaged with the first engaging hole 82. At this time, the inner convex ring 42 in the extension pipe 41 applies a force to the arc-shaped block 97, and the guide bar 95 is moved by the arc-shaped block 97 to move the fixed block 63.

[0021] [Operating Principle] When the hose 13 is attached to the mouth fitting 11 and the outlet fitting 12, one end of the hose 13 is positioned in the engagement groove 20, and the threaded sleeve 23 rotates on the male thread 80. This causes the pusher tube 73 on the mounting rod 72 to rotate due to the connecting rod 71, and the pusher tube 73 can press to move the connecting block 62. By pressing the connecting block 62, the movable pipe 61 moves within the lumen 50, and one end of the insertion rod 52 moves inside the mounting pipe 51, pulling the adjustment spring 60. At this time, the surface of the hose 13 is clamped by the connecting block 62 and the inner wall of the engagement groove 20. As the fixing block 63 in the connecting block 62 moves toward the direction of the pressing groove 21 until the engaging block 96 is positioned on one side of the pressing groove 21, it presses the telescopic button 93 in the second engaging hole 83 and contracts the elastic spring 91, the insertion block 33 moves along the insertion groove 81 and changes so that the telescopic button 93 engages with the first engaging hole 82, the inward convex ring 42 in the extension pipe 41 applies force to the arc-shaped block 97, the arc-shaped block 97 causes the guide bar 95 to move the fixing block 63, the telescopic spring 98 contracts, the guide bar 95 causes the engaging block 96 to engage with the surface of the hose 13 in the pressing groove 21, improving stability between the hose 13 and the inlet fitting 11, and between the hose 13 and the outlet fitting 12.

[0022] These specific embodiments are merely interpretations of the present invention and do not limit it. Those skilled in the art may, after reading this specification, make modifications to these embodiments that lack inventive step as necessary. Any modifications within the scope of the claims of the present invention shall be protected under patent law. [Explanation of Symbols]

[0023] 10 Pump body 11 Inlet joint 12 Outlet fitting 13 Hose 20 Engagement groove 21 Pressing groove 22 First position regulating ring 23 Thread Sleeve 30 connecting pipes 31 Movable port 32 Guide Blocks 33 Insertion Block 40 Mounting Blocks 41 Stretched pipe 42 Inward-convex ring 43 Connection Panel 50 lumen 51 Mounting pipe 52 Insertion Rod 53 Control Panel 60 Adjustable spring 61 Movable tube 62 connection blocks 63 Fixed Blocks 70 Second position regulating ring 71 Connecting Rod 72 Mounting Lot 73 Pusher Tubes 80 Male screw 81 Insertion groove 82 First engagement hole 83 Second engagement hole 90 Operating Chamber 91 Elastic spring 92 Push plate 93 Stretchable buttons 94 Placement groove 95 Guide Bar 96 Engagement Block 97 Arc-shaped block 98. Expanding spring

Claims

1. A flexible membrane armature-driven blood pump comprising a pump body (10), an inlet connector (11) and an outlet connector (12) communicating with the pump body (10), the ends of which are connected to a hose (13) via a fastening mechanism, the fastening mechanism including an engagement groove (20) opened in the inlet connector (11), several pressing grooves (21) communicating with the engagement groove (20) opened on the surface of the inlet connector (11), and a first position regulating ring (22) and Each of the second position regulating rings (70) is fixedly connected, and a male screw (80) is provided between the first position regulating ring (22) and the second position regulating ring (70) in the inlet joint (11), a lumen (50) is opened inside the inlet joint (11), several mounting pipes (51) are provided inside the lumen (50), an insertion rod (52) is movably connected to one end of the mounting pipe (51), and an operation panel (53) is movably connected to the other end of the insertion rod (52) away from the mounting pipe (51), A clamping mechanism is provided in the inlet joint (11). The clamping mechanism includes an adjustment spring (60) connected to a mounting pipe (51) and an insertion rod (52), the ends of which are connected to an operating panel (53) and a lumen (50), respectively, and a movable tube (61) is attached to the operating panel (53), one end of which movably passes through an engagement groove (20), several connecting blocks (62) are fixedly connected to the movable tube (61), a fixed block (63) is connected to the end of the connecting block (62) near the inlet joint (11), and a pressing mechanism is provided on the fixed block (63). The pressing mechanism includes an arrangement groove (94) opened in the fixed block (63), a guide bar (95) is slidably made in the arrangement groove (94), an engagement block (96) is connected to one end of the guide bar (95), an arc-shaped block (97) is provided at the other end of the guide bar (95) away from the engagement block (96), and several expansion and contraction springs (98) are fixedly connected between the arc-shaped block (97) and the fixed block (63). A flexible membrane armature-driven blood pump is characterized in that an adjustment mechanism is further provided on the inlet joint (11), the adjustment mechanism includes a threaded sleeve (23) that is screwed onto a male thread (80), the threaded sleeve (23) is located between a first position regulating ring (22) and a second position regulating ring (70), a connecting plate (43) is connected to one end of the threaded sleeve (23), a connecting tube (30) is fixedly connected to the connecting plate (43), several connecting rods (71) are provided on the connecting plate (43), a mounting rod (72) is connected to one end of the connecting rod (71) away from the connecting plate (43), and a pusher tube (73) is connected to the one end of the mounting rod (72) away from the connecting rod (71).

2. The armature-driven blood pump for a flexible membrane according to claim 1, characterized in that the connecting rod (71) is located outside the second position regulating ring (70), and the mounting rod (72) is located on one side of the second position regulating ring (70).

3. The armature-driven blood pump for a flexible membrane according to claim 1, characterized in that a traction mechanism is further provided on the inlet joint (11), the traction mechanism includes a movable port (31) symmetrically opened in the connecting pipe (30), a mounting block (40) is symmetrically fixed and connected to the outside of the connecting pipe (30), an insertion groove (81) is opened at one end of the mounting block (40), and a first engagement hole (82) and a second engagement hole (83) communicating with the insertion groove (81) are opened on the surface of the mounting block (40).

4. The armature-driven blood pump for a flexible membrane according to claim 3, characterized in that the traction mechanism includes an insertion block (33) connected to an insertion groove (81), a guide block (32) is provided at one end of the insertion block (33), the guide block (32) is movably mounted corresponding to a movable port (31), an extension tube (41) is connected to both of the two guide blocks (32), and the extension tube (41) is located between a pusher tube (73) and a connecting tube (30).

5. The traction mechanism further includes an internally convex ring (42) fixedly connected to the inner wall of the extension tube (41), an operating chamber (90) is provided inside the insertion block (33), an elastic spring (91) is fixedly connected to the operating chamber (90), a push plate (92) is provided at one end of the elastic spring (91), an extension button (93) is attached to the push plate (92), and the extension button (93) is connected inside the insertion block (33) so as to pass through, characterized in that the armature-driven blood pump of a flexible membrane according to claim 4.

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