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Titolo:
ESTIMATING MECHANICAL BLOOD TRAUMA IN A CENTRIFUGAL BLOOD PUMP - LASER-DOPPLER ANEMOMETER MEASUREMENTS OF THE MEAN VELOCITY-FIELD
Autore:
PINOTTI M; PAONE N;
Indirizzi:
AV JESUINO MARCONDES MACHADO 1845 BR-13023321 CAMPINAS SP BRAZIL UNICAMP,FAC ENGN MECAN,DEPT ENERGIA CAMPINAS SP BRAZIL UNIV ANCONA,DIPARTIMENTO MECCAN ANCONA ITALY
Titolo Testata:
Artificial organs
fascicolo: 6, volume: 20, anno: 1996,
pagine: 546 - 552
SICI:
0160-564X(1996)20:6<546:EMBTIA>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Keywords:
CENTRIFUGAL BLOOD PUMP; CARDIOPULMONARY BYPASS; LASER DOPPLER ANEMOMETER MEASUREMENTS; FLOW VISUALIZATION; DETERMINATION OF REYNOLDS STRESSES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
16
Recensione:
Indirizzi per estratti:
Citazione:
M. Pinotti e N. Paone, "ESTIMATING MECHANICAL BLOOD TRAUMA IN A CENTRIFUGAL BLOOD PUMP - LASER-DOPPLER ANEMOMETER MEASUREMENTS OF THE MEAN VELOCITY-FIELD", Artificial organs, 20(6), 1996, pp. 546-552

Abstract

A laser Doppler anemometer (LDA) was used to obtain the mean velocityand the Reynolds stress fields in the inner channels of a well-known centrifugal vaneless pump (Bio-pump). Effects of the excessive flow resistance against which an occlusive pump operates in some surgical situations, such as cardiopulmonary bypass, are illustrated. The velocityvector field obtained from LDA measurements reveals that the constraint-forced vortex provides pumping action in a restricted area in the core of the pump. In such situations, recirculating zones dominate the flow and consequently increase the damage to blood cells and raise therisk of thrombus formation in the device. Reynolds normal and shear stress fields were obtained in the entry flow for the channel formed bytwo rotating cones to illustrate the effects of flow disturbances on the potential for blood cell damage.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/10/20 alle ore 08:03:59