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JP-2026514208-A - Flexible membrane armature-driven blood pump

JP2026514208AJP 2026514208 AJP2026514208 AJP 2026514208AJP-2026514208-A

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 effects are as follows: Through the cooperation of the movable tube and the male thread, the problem of poor stability between the hose and the joint 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. [Selection Diagram] Figure 1

Inventors

  • 徐燦
  • 王東進

Assignees

  • 南京鼓楼医院
  • 南京工業大学

Dates

Publication Date
20260507
Application Date
20241025
Priority Date
20240325

Claims (5)

  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 flexible membrane armature-driven blood pump 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 flexible membrane armature-driven blood pump 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 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 the pusher tube (73) and the connecting tube (30), characterized in that, as described in claim 3, the armature-driven blood pump for a flexible membrane.
  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.

Description

This invention relates to the field of medical machinery technology, and more particularly to a flexible membrane armature-driven blood pump. Currently, the number of heart failure patients in China is increasing year by year. One effective treatment for end-stage heart failure is the manual implantation of mechanical ventricular assist devices, primarily left ventricular assist devices. However, many existing left ventricular assist devices are large and require invasive, high-risk surgery for implantation, so they are usually limited to end-stage heart failure patients. For heart failure patients who have not yet reached the end stage, implanting a relatively small pump could avoid these problems and reduce the incidence of complications during surgery. However, standard blood pumps available for clinical use 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, causing complications such as hemolysis, thrombosis, and bleeding. Furthermore, because they operate at a single pump speed, they lower the patient's pulse pressure during clinical use, resulting in complications associated with continuous, non-physiological blood pumping, such as gastrointestinal bleeding, aortic valve dysfunction, or stroke. Therefore, researchers are developing pulsation algorithms for these rotary pumps to improve the cleaning effect and reduce the formation of blood clots and other necrotic tissue. Conventional artificial blood pumps lack a fastening mechanism for connecting hoses to either the inlet or outlet fittings during use. When connecting hoses, the elasticity of the hoses allows them to only secure to the two fittings, resulting in poor stability between the hose and the fittings. Therefore, there is a need to design a flexible membrane armature-driven blood pump applicable to the field of conventional artificial blood pumps. This is a schematic diagram of the structure of an armature-driven blood pump with a flexible membrane according to the present invention.This is a schematic diagram of the fastening mechanism and pipe mounting structure of the present invention.This is a schematic diagram of the fastening mechanism and pipe mounting structure of the present invention.This is a schematic diagram of the exploded structure of the adjustment mechanism and clamping mechanism of the present invention.This is a schematic diagram of the cross-sectional structure of the clamping mechanism of the present invention.This is a schematic cross-sectional diagram of the adjustment mechanism of the present invention.This is a schematic diagram of the cross-sectional structure of the traction mechanism according to the present invention.This is a schematic diagram of the structure of the pressing mechanism of the present invention. The present invention will be described in more detail below with reference to the drawings.