Baylor College of Medicine

Miwatec Co., Ltd.

Other

Miwatec Incorporated

Hitmac (USA), Inc.

Toshiyuki Shinohara

Yukihiko Nose

Ryo Kosaka

Hirohito Sumikura

Kuniyoshi Watanabe

Tadashi Motomura

Yukihiko Nosé

Seiji Ichikawa

Fumiyuki Ichihashi

The present invention provides an inflow cannula tip that is shaped to prevent suction with the ventricular wall and adapted to prevent platelet adhesion. In particular, the inlet portion of the cannula tip comprises two projections extending from the cylindrical body of the cannula tip with gaps between the projections. The projections may have beveled edges. The inlet portion of the cannula tip can accept blood flow from either the gaps in the side or from the bottom of the tip. Even if the edge of the cannula tip is close to or even touching ventricle wall, a suction condition will not result, as blood is allowed to flow through the gaps between the projections.

Cannula tip for a cardiac assist device

A control system for a continuous flow rotary blood pump is provided. A normal operating range of the blood pump is established. The normal operating range may comprise a normal pump flow range and a normal pressure head range. A target rotational speed of the pump is set in accordance with the normal operating range. A current operating condition of the blood pump is determined. The current operating condition may comprise a current pump flow, a current pressure head, and a current rotational speed of the pump. The current operating condition is compared with the normal operating range. An appropriate control algorithm is selected from a plurality of available control algorithms based on the comparison. The target rotational speed of the pump is adjusted using the selected control algorithm to maintain or recover the normal operating range.

Methods and apparatus for controlling a continuous flow rotary blood pump

The present invention provides methods for detecting an abnormal condition of a blood pump system based on the power consumption of the pump actuator. By plotting differentiated power consumption of the pump actuator over time against the power consumption, a plot pattern is obtained. A change of the plot pattern area and/or a movement of the plot pattern will indicate a change in condition of the pump. A Heart Pump Area (HPA) index may be established which corresponds to the changing area of the plot pattern over time. A Heart Pump Position (HPP) index may be established which corresponds to the changing position of the plot pattern over time (e.g., corresponding to the distance the plot pattern has moved). By plotting the HPA index against the HPP index, changes in the condition of the pump can be monitored and any abnormal condition of the pump can be detected.

Methods for detecting an abnormal condition of a blood pump system

It is an object of the present invention to realize a small and light blood pump that can control thrombosis and moreover, endure a prolonged use. A blood pump comprising an impeller, a casing having a suction inlet and a delivery outlet and rotatably encasing the impeller, a magnetic drive means for rotating the impeller by magnetically acting from outside of the casing on a magnet that the impeller includes, a magnetic attraction force adjustment means for adjusting the attraction force by said magnetic action, a control means for rotating speed of said magnetic drive means, and a pair of pivot bearings for supporting pivots at both ends of the impeller rotation shaft, wherein the distance between bearing faces of said both pivot bearings is set longer than the length of the rotation shaft of the impeller and the rotation speed of the impeller is controlled to a predetermined speed by said control means for rotating speed so as to levitate the impeller in the blood flow in the casing and to maintain out of contact between the pivots at both ends of the rotation shaft of the impeller and the bearing face of said both pivot bearing.

Blood pump

Growing community of inventors

Houston, TX, United States of America

Toshiyuki Shinohara