Estimating allowable blood loss with correction for variations in blood volume.

Acta Anaesthesiologica Scandinavica
R G Hahn

Abstract

All the theoretical relationships between blood loss and change in haematocrit used for calculating the allowable pre-transfusion blood loss assume a strictly normovolaemic situation. In this study a formula was derived in which account was taken of the variation in blood volume. The formula was based on clinical data. Measurements of the blood loss, the blood haemoglobin concentration and the haematocrit (HCT) were performed on 230 occasions in the course of 35 transurethral prostatic resections. The change in blood volume was estimated by the haemoglobin dilution method and the value so obtained was compared to both the measured haematocrit and the theoretical value that would presumably have been recorded if there had been no change in blood volume. The relationship established from these comparisons was: blood loss = preoperative blood volume x [In preop HCT - In postop HCT (1 + 0.15 x blood volume change)].

References

May 1, 1986·Acta Anaesthesiologica Scandinavica·H Zetterström, L Wiklund
Dec 1, 1974·Anesthesiology·D L Bourke, T C Smith
May 1, 1969·Canadian Anaesthetists' Society Journal·J W Desmond, R A Gordon
Sep 1, 1967·Canadian Anaesthetists' Society Journal·D J Armstrong, D C Finlayson
Oct 1, 1981·Acta Anaesthesiologica Scandinavica·B Roseberg, K Wulff
Mar 1, 1983·Anesthesiology·J B Gross
Dec 1, 1953·The Journal of Clinical Investigation·H CHAPLINH VETTER

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Citations

May 17, 2005·European Journal of Anaesthesiology·Y SanoR Ogawa
May 3, 2011·Plastic and Reconstructive Surgery·Sarah E AppletonSteven F Morris
Dec 9, 2004·Transfusion·Aryeh Shander, Tanuja S Rijhwani
Jul 1, 1990·British Journal of Urology·R G Hahn
Jul 1, 1994·Journal of Clinical Anesthesia·Y J MortelmansH Van Aken
Jul 30, 2014·The Journal of Maternal-fetal & Neonatal Medicine : the Official Journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians·Magdy Refaat AhmedMamdouh Mahdy Said
Nov 10, 2017·Computational and Mathematical Methods in Medicine·Matthew B Wolf
Jun 14, 2003·The Cochrane Database of Systematic Reviews·P A CarlessD M Anthony

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