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Ann Thorac Surg 1974;18:164-171
© 1974 The Society of Thoracic Surgeons

Articles

Emboli (Debris) Produced by Bubble Oxygenators Removal by Filtration

U. Scott Page, M.D., John C. Bigelow, M.D., Christopher R. Carter, Roy L. Swank, M.D., Ph.D.*

Division of Neurology and the Departments of Anatomy and Surgery, University of Oregon Medical School and Good Samaritan Hospital and Medical Center, Portland, Ore

Accepted for publication February 20, 1974.

* Address reprint requests to Dr. Swank. Division of Neurology, University of Oregon Medical School, 3181 S.W. Sam Jackson Park Rd., Portland, Ore. 97201


   Abstract
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 Abstract
Footnotes
 References
 
The screen filtration pressure (SFP) and its derivative, the screen filtration resistance (SFR), were measured in blood in the extracorporeal circuit of humans during cardiopulmonary bypass. It was confirmed that blood from the suction line had very high SFP and SFR. These were returned to normal by filtration through Dacron wool. During the first few minutes of bypass the SFR of venous blood was high, but thereafter it remained low. The SFR of oxygenated blood was elevated continuously during the procedure, especially after nearly 2 hours of bypass. Arterial blood consistently had a low SFR after Dacron-wool filtration. The high SFR values following oxygenation are interpreted as being due to particle (microemboli) production by the oxygenator. These were uniformly removed by a Dacron-wool arterial filter.


   Footnotes
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 Abstract
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References
 
Supported in part by funds held by the Medical Research Foundation of Oregon and the Advancement Fund of the University of Oregon Medical School.


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