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We administered a 15 mg i.v. bolus of ephedrine at the commencement of epidural blockade to nine healthy parturients scheduled for elective caesarean section. Nine other patients did not receive prophylactic ephedrine before epidural anaesthesia (control group). Lactated Ringer solution, 30 ml/kg, was infused before and during blockade, and left uterine displacement was used to minimize aortocaval compression. A133Xe i.v. technique was used to measure intervillous blood flow (IBF) before and 20-25 min after epidural block. The mean arterial pressure (MAP) decreased after epidural blockade in the ephedrine group by 0.67 +/- 0.8 (mean +/- s.d.) kPa and by 1.20 +/- 1.1 (mean +/- s.d.) kPa in the control group. In spite of the decrease in MAP, IBF increased by 6% in patients receiving ephedrine (N.S.), whereas it decreased by 11% in the control group (N.S.). In the ephedrine group there was in this preliminary study a trend to increasing IBF during falling perfusion pressure (MAP). The results of this preliminary study suggest that ephedrine will not affect IBF, but to prevent maternal hypotension ephedrine should be used as an i.v. infusion instead of a bolus injection.
A I Hollmén, and
R Jouppila, and
G A Albright, and
P Jouppila, and
H Vierola, and
A Koivula
November 1994,
Canadian journal of anaesthesia = Journal canadien d'anesthesie,
A I Hollmén, and
R Jouppila, and
G A Albright, and
P Jouppila, and
H Vierola, and
A Koivula
February 1990,
Acta anaesthesiologica Scandinavica,
A I Hollmén, and
R Jouppila, and
G A Albright, and
P Jouppila, and
H Vierola, and
A Koivula
March 1982,
Canadian Anaesthetists' Society journal,
A I Hollmén, and
R Jouppila, and
G A Albright, and
P Jouppila, and
H Vierola, and
A Koivula
January 2002,
European journal of anaesthesiology,
A I Hollmén, and
R Jouppila, and
G A Albright, and
P Jouppila, and
H Vierola, and
A Koivula
May 2005,
European journal of anaesthesiology,
A I Hollmén, and
R Jouppila, and
G A Albright, and
P Jouppila, and
H Vierola, and
A Koivula
March 2003,
European journal of anaesthesiology,
A I Hollmén, and
R Jouppila, and
G A Albright, and
P Jouppila, and
H Vierola, and
A Koivula
December 1979,
Acta anaesthesiologica Scandinavica,
A I Hollmén, and
R Jouppila, and
G A Albright, and
P Jouppila, and
H Vierola, and
A Koivula
November 1992,
Anaesthesia and intensive care,
A I Hollmén, and
R Jouppila, and
G A Albright, and
P Jouppila, and
H Vierola, and
A Koivula
December 2018,
Anaesthesia,
A I Hollmén, and
R Jouppila, and
G A Albright, and
P Jouppila, and
H Vierola, and
A Koivula
October 1988,
British journal of anaesthesia,
