British Journal of Anaesthesia, Vol 75, Issue 3 262-265, Copyright © 1995 by The Board of Management and Trustees of the British Journal of Anaesthesia
R. Jackson, J. A. Reid and J. Thorburn
We have compared the protective effect of 1000 ml preload with 200 ml
preload of crystalloid solution, administered during the 10 min before
spinal anaesthesia was induced, in 60 healthy women with no fetal
compromise undergoing elective Caesarean section. The spinal anaesthetic
was managed identically in both groups by an anaesthetist who was unaware
of the volume of fluid administered. A prophylactic infusion of ephedrine
60 mg in Hartmann's solution 500 ml was given according to maternal
arterial pressure. Hypotension was defined as > or = 30% reduction from
baseline or < 90 mm Hg, and was treated by i.v. ephedrine bolus doses.
There was no significant difference in ephedrine requirements between the
two groups or in the incidence, severity or duration of hypotension: 10
women in the 1000-ml group, five episodes lasting > or = 3 min compared
with nine women in the 200-ml group, four lasting > or = 3 min. There
was no difference between neonates in each group. We have now abandoned the
routine of preloading before regional anaesthesia.
CLINICAL INVESTIGATIONS
Volume preloading is not essential to prevent spinal-induced hypotension at Caesarean section
Department of Anaesthesia, Queen Mother's Hospital, Yorkhill, Glasgow G11 6NT
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