Pulsatile flow and simple flow control method during weaning period in centrifugal pump: toward more expanded usage in open heart surgery.

Abstract:

:To expand the usage of the centrifugal pump (CP) in open heart surgery, we performed two studies. In the first, we evaluated pulsatile flow in the CP. In vitro pump performance of the Terumo Capiox pump (TCP) and the Sarns Delphin pump (SDP) and increase of free hemoglobin (mg/dl) after driving 6 h were investigated using bovine blood. A roller pump (RP) was used as a comparison. Equally effective pulsatile flow was obtained in both CPs. Hemolysis was less severe in TCP (120 mg/dl) than SDP (210 mg/dl) and RP (320 mg/dl). In the second study, we evaluated a simple flow control method. Flow rate was easily controlled with step-wise clamping of 3-pronged tubing (Triple-flow) without changing rotational speed, regardless of afterload. Fluctuation of flow was much less with this method than with the rotational speed change method. The use of pulsatile flow of TCP, with its minimum increase of hemolysis and the easier flow control method during the weaning process, may expand the usage of CP in open heart surgery.

journal_name

Artif Organs

journal_title

Artificial organs

authors

Nishida H,Koyanagi H,Endo M,Suzuki S,Oshiyama H,Nojiri C,Fukasawa H,Akutsu T

doi

10.1111/j.1525-1594.1994.tb03393.x

subject

Has Abstract

pub_date

1994-09-01 00:00:00

pages

643-9

issue

9

eissn

0160-564X

issn

1525-1594

journal_volume

18

pub_type

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