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Roller pump with dynamic occlusion adjustment

A technology of roller pumps and rollers, which is applied in the field of roller pumps and can solve problems such as inconsistencies and troubles

Active Publication Date: 2015-07-15
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It's cumbersome and inconsistent

Method used

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  • Roller pump with dynamic occlusion adjustment
  • Roller pump with dynamic occlusion adjustment
  • Roller pump with dynamic occlusion adjustment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] figure 1 One embodiment of a roller pump 20 in accordance with the principles of the present invention is shown. The roller pump 20 includes a housing 22 holding various drive elements (not shown, but described in more detail below), a roller head assembly 24, a stator frame 26, and an occlusion adjustment assembly 28 (generally labeled). Details of each element are provided below. In general, the roller pump 20 is configured to maintain a length of flexible tubing 30 between the stator frame 26 and one or more rollers 32 provided with the roller head assembly 24 . Optionally, one or more pipe clamps 34 may be provided to hold the pipe 30, if desired. Regardless, the duct 30 is compressed between the stator frame 26 and the roller (or rollers) 32 . As the roller head assembly 24 rotates (via drive elements within the housing 22 ), a roller (or rollers) 32 travels along the conduit 30 , thereby pushing the fluid medium through the conduit 30 . The radial position of ...

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PUM

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Abstract

A roller pump including a drive shaft, a motor, a roller head assembly, a stator housing, and an occlusion adjustment assembly. The drive shaft is coupled to the motor. The roller head assembly includes a hub, a slide body, and a roller. The hub is mounted to the drive shaft, and maintains the slide body and the roller. The stator housing forms a raceway receiving surface. The occlusion adjustment assembly includes an actuator knob, an actuating structure, and a ground shaft. The actuating structure interfaces with the slide body, and thus the roller, with rotation of the knob. The ground shaft supports the knob and is rotationally isolated from the drive shaft. A user and optionally a control system can adjust occlusion while the pump continuously delivers a fluid medium.

Description

Background technique [0001] The present disclosure relates to roller pumps for use in medical devices or systems, such as cardiopulmonary bypass machines. More specifically, the present invention relates to roller pumps with an occlusion modulation feature that can be activated during pump operation. [0002] Roller (or peristaltic) pumps have many uses in the medical field. For example, roller pumps are used during cardiovascular surgery to improve blood circulation between the patient and the heart-lung machine. Roller pumps operate by pumping fluid through the positive displacement of revolving rollers using an obturator hose. In heart-lung machines, multiple dedicated roller pumps are often used as part of the perfusion circuit, pumping the arterial circuit (where centrifugal pumps are not used), venting, cardiotomy suction, and cardioplegia. Other common medical uses are the transfer of blood between a patient and a kidney dialyzer, and intravenous (IV) feeding of IV s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B43/12
CPCF04B43/1253F04B43/1276A61M60/279A61M60/109A61M60/38F04B49/065F04B53/16F04B2203/0207F04B2205/03F04B2205/09
Inventor C·彼德森K·拉达克里西南W·卡彭特
Owner MEDTRONIC INC