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The Rewarming Index Formula for Pediatric Cardiopulmonary Perfusion
Author(s) -
Itoh Hideshi,
Kasahara Shingo,
Fujii Yasuhiro,
Kotani Ysuhiro,
Arai Sadahiko,
Sano Shunji
Publication year - 2009
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.2009.00945.x
Subject(s) - cardiopulmonary bypass , perfusion , body surface area , medicine , anesthesia , body weight , cardiology
Careful rewarming of perfusion blood following cardiopulmonary bypass surgery is critical to a successful outcome, but the optimal rewarming strategy is not clear. The purpose of this study was to derive a formula for a rewarming index (defined as [rewarming time × perfusion flow]/[body weight × body surface area]) that would enable the calculation of the ideal rewarming conditions for pediatric cardiopulmonary perfusion. We retrospectively investigated 220 pediatric cardiopulmonary bypass operations conducted from July 2005 to June 2008 in Okayama University Hospital, Japan. We determined the formula as Φ = (T × Q)/(R × S) = |0.9127P − 0.0152|, where Φ = rewarming index, T = rewarming time (min), Q = perfusion volume (L), R = body weight (kg), S = body surface area (m 2 ), and P = temperature gap (). The formula will help those who perform pediatric cardiopulmonary bypass surgery to establish ideal perfusion flow conditions and to control physiological temperature during rewarming.