Venous reservoir

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(12) United States Patent

Tamari

(io) Patent No.: (45) Date of Patent:

US 7,485,260 B2 *Feb. 3, 2009

(65) Prior Publication Data

US 2007/0078369 Al Apr. 5, 2007

Related U.S. Application Data

(62) Division of application No. 10/915,000, filed onAug. 9, 2004, now Pat. No. 7,131,966, and a division of application No. 09/795,782, filed on Feb. 28, 2001, now Pat. No. 6,773,426, and a division of application No. 09/141,960, filed on Aug. 28, 1998, now Pat. No. 6,337,049.

(51) Int. CI.

A61M1/00 (2006.01)
A61M 37/00 (2006.01)

(52) U.S. CI 422/44; 604/6.01; 604/6.15;

604/320

(58) Field of Classification Search 604/413,

604/403^11, 4.01, 5.01, 6.01-6.16, 151-153, 604/246, 249, 132, 317-322, 327; 422/44^8;

210/315,446; 128/DIG. 3, DIG. 24 See application file for complete search history.

(56) References Cited

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* cited by examiner

Primary Examiner—Leslie R Deak
Assistant Examiner—Phil Wiest

Venous reservoirs are interposed between the patient and the arterial pump and serve to remove air bubbles and provide compliance that accommodates variations in the volume of blood circulating in the extracorporeal circuit during cardiopulmonary bypass (CPB). The invention is a reservoir that incorporates automated means to remove air bubbles from the venous line prior to the blood entering the arterial blood pump. In another form, the reservoir includes means that handles foam prior to the blood entering the blood pump. In yet another form, the invention is means that improve air removal in a soft shell venous reservoir. These features are applicable to CPB circuits using gravity drainage or vacuum assisted venous drainage.

22 Claims, 13 Drawing Sheets