The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 06, 2001
Filed:
Feb. 26, 1999
Yasuhisa Ohara, Nagoya, JP;
Yoshiyuki Takami, Houston, TX (US);
Goro Otsuka, Houston, TX (US);
Yukihiko Nose, Houston, TX (US);
Kenzo Makinouchi, Gamo-gun, JP;
Michihiro Yokokawa, Gamo-gun, JP;
Other;
Abstract
The present invention provides a blood pump capable of substantially completely preventing thrombus from attaching to the inner bottom portion of the casing without lowering the anti-hemolytic characteristic of blood. A centrifugal blood pump in accordance with the present invention comprises a pump casing, a suction inlet disposed at the central portion on the upper side of the casing, a delivery outlet disposed at the bottom peripheral portion of the casing, a main impeller (D in diameter) for forming a centrifugal flow of blood supplied from the suction inlet in the range from the central portion to the peripheral portion to feed the blood to the delivery outlet, wherein the main impeller is provided with an stirring impeller, the surface of which is provided with one or more stirring elements (L in entire length) having the shape of a fin or a groove, and the dimensions of the stirring elements are determined to satisfy inequality (1): 0.43<LD<1.30 and inequality (2) 0.03<S/A<0.21, where S is the surface area of the blood contact surfaces of the stirring elements.