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A new model of centrifugal blood pump for cardiopulmonary bypass: design improvement, performance, and hemolysis tests
Leme, Juliana; Fonseca, Jeison; Bock, Eduardo; Silva, Cibele da; Silva, Bruno Utiyama da; Santos, Alex Eugênio dos; Dinkhuysen, Jarbas; Andrade, Aron; Biscegli, José F.
Afiliación
  • Leme, Juliana; Instituto Dante Pazzanese de Cradiologia. São Paulo. BR
  • Fonseca, Jeison; Instituto Dante Pazzanese de Cradiologia. São Paulo. BR
  • Bock, Eduardo; Instituto Dante Pazzanese de Cardiologia. São Paulo. BR
  • Silva, Cibele da; Instituto Dante Pazzanese de Cardiologia. São Paulo. BR
  • Silva, Bruno Utiyama da; Instituto Dante Pazzanese de Cardiologia. São Paulo. BR
  • Santos, Alex Eugênio dos; UNIPAC Division. Pompéia. BR
  • Dinkhuysen, Jarbas; Instituto Dante Pazzanese de Cardiologia. São Paulo. BR
  • Andrade, Aron; Instituto Dante Pazzanese de Cradiologia. São Paulo. BR
  • Biscegli, José F; Instituto Dante Pazzanese de Cradiologia. São Paulo. BR
Artif Organs ; 35(5): 443-447, 2011. ilus, tab
Article en En | SES-SP, SESSP-IDPCPROD, SES-SP | ID: biblio-1060075
Biblioteca responsable: BR79.1
Ubicación: BR79.1
ABSTRACT
A new model of blood pump for cardiopulmonary bypass (CPB) application has been developed and evaluated in our laboratories. Inside the pump housing is a spiral impeller that is conically shaped and has threads on its surface. Worm gears provide an axial motion of the blood column. Rotational motion of the conical shape generates a centrifugal pumping effect and improves pumping performance. One annular magnet with six poles is inside the impeller, providing magnetic coupling to a brushless direct current motor. In order to study the pumping performance, a mock loop system was assembled. Mock loop was composed of Tygon tubes (Saint-Gobain Corporation, Courbevoie, France), oxygenator, digital flowmeter, pressure monitor, electronic driver, and adjustable clamp for flow control. Experiments were performed on six prototypes with small differences in their design. Each prototype was tested and flow and pressure data were obtained for rotational speed of 1000, 1500, 2000, 2500, and 3000 rpm. Hemolysis was studied using pumps with different internal gap sizes (1.35, 1.45, 1.55, and 1.7 mm). Hemolysis tests simulated CPB application with flow rate of 5 L/min against total pressure head of 350 mm Hg. The results from six prototypes were satisfactory, compared to the results from the literature. However, prototype #6 showed the best results. Best hemolysis results were observed with a gap of 1.45 mm, and showed a normalized index of hemolysis of 0.013 g/100 L. When combined, axial and centrifugal pumping principles produce better hydrodynamic performance without increasing hemolysis.
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Colección: 06-national / BR Base de datos: SES-SP / SESSP-IDPCPROD Asunto principal: Sangre / Bombas Centrífugas / Hemólisis Idioma: En Revista: Artif Organs Año: 2011 Tipo del documento: Article
Buscar en Google
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Colección: 06-national / BR Base de datos: SES-SP / SESSP-IDPCPROD Asunto principal: Sangre / Bombas Centrífugas / Hemólisis Idioma: En Revista: Artif Organs Año: 2011 Tipo del documento: Article