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The effect of four different surgical prone positions on cardiovascular parameters in healthy volunteers
Author(s) -
WADSWORTH R.,
ANDERTON J. M.,
VOHRA A.
Publication year - 1996
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.1996.tb12608.x
Subject(s) - supine position , medicine , heart rate , cardiac index , blood pressure , prone position , mean arterial pressure , cardiac output , body position , vascular resistance , anesthesia , cardiology , physical medicine and rehabilitation
Summary Twenty healthy volunteers were placed in four different surgical prone positions: on pillows, on an evacuatable mattress, on pelvic props and in the knee—chest position. The normal supine position was used as a control for the measurement of cardiovascular parameters. Mean arterial pressure was measured by automated oscillotonometry. Transthoracic electrical bioimpedance was used to measure cardiac output and heart rate. Cardiac index and total vascular resistance index were derived from these data. No significant changes in heart rate or mean arterial pressure occurred when the volunteers were moved from the supine position to any of the four prone positions or when returned to the supine position again. Cardiac index decreased significantly on going from the supine to the knee—chest position (20%) and onto the props (17%) but not onto the evacuatable mattress (11%) or the pillows (3% ).