DUAN Xin , JI Bingyang , LIU Gang , et al .
  • 1.Fu Wai Hospital and Cardiovascular Institute, Chinese Academy of Medical Sciences &;
  • Peking Union Medical College, Beijing 100037, P.R. China;;
Cardiopulmonary bypass; Shunt; Adult
Export PDF Favorites Scan Get Citation

Abstract Full text Figures/Tables References Cited by

Abstract： Objective To evaluate different shunting flow in varied conditions in a simulated adult cardiopulmonary bypass (CPB) model under normothermia. Methods We established the pseudo adult patient undergoing CPB at four different shunting states with devices of heartlung machine, heatcooler, an adult membrane oxygenator and arterial filter. In state 1, purge line of the arterial filter was open alone; In state 2, purge line combined with 6.5 mm tubing hemoconcentrator shunting was open; In state 3, purge line combined with 5 mm tubing hemoconcentrator was open; In state 4, purge line combined with blood cardioplegia shunting was open. The flow of preoxygenator and postfilter was recorded with ultrasonic flowmeter, and the pressure of purge line and postarterial filter was also detected. Results At state 1, when the pump flow was invariable, the percentage of the shunting flow increased with the increase of postfilter pressure. However, when the postfilter pressure was constant, the percentage of the shunting flow decreased with the increase of the pump flow. The purge line pressure increased with the increase of the postfilter pressure at a constant pump flow under state 1. The shunting flow of state 2 was the largest among all the four states. The shunting flow of state 3 was similar to that of state 4. All the purge line pressure was lower than the postfiler pressure of the circuit in the four states. Conclusion Under states of different shunting opening, different degrees of blood flow are diverted away from the arterial line. The shunting flow increases at a lower pump flow and a higher postfilter pressure. A flow probe located in the postfilter line may be necessary to monitor realtime arterial flow.

Citation： DUAN Xin ,JI Bingyang,LIU Gang,et al .. Evaluation of Shunting Flow Differences in Varied Conditions in a Simulated Adult Cardiopulmonary Bypass Model. Chinese Journal of Clinical Thoracic and Cardiovascular Surgery, 2011, 18(1): 49-53. doi: Copy

Copyright © the editorial department of Chinese Journal of Clinical Thoracic and Cardiovascular Surgery of West China Medical Publisher. All rights reserved

  • Previous Article

    重症肌无力危象长期持续状态成功脱离呼吸机一例