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Central Blood Pooling as an Explanation for Lowered FRC during Anaesthesia? Thigh Volume Measurements by Plethysmography
Author(s) -
Hedenstierna G.,
Johansson H.,
Linde B.
Publication year - 1982
Publication title -
acta anaesthesiologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 107
eISSN - 1399-6576
pISSN - 0001-5172
DOI - 10.1111/j.1399-6576.1982.tb01830.x
Subject(s) - medicine , plethysmograph , anesthesia , blood volume , thigh , volume (thermodynamics) , surgery , physics , quantum mechanics
Segmental volumes of the thigh and the upper arm were measured by means of an air‐filled plethysmograph before and during various anaesthesias. A small but significant fall in segmental volume was seen with the induction of anaesthesia with thiopentone. A further fall was observed during neurolept anaesthesia but not with halothane. Epidural and spinal anaesthesias caused no change in segmental thigh volume. The results suggest a redistribution of 50–150 ml blood from the extremities to the trunk during general anaesthesia. This redistribution may contribute to the well‐known fall in FRC with general anaesthesia.