British Journal of Anaesthesia, Vol 78, Issue 3 264-266, Copyright © 1997 by The Board of Management and Trustees of the British Journal of Anaesthesia
A. D. Walder and A. R. Aitkenhead
We studied 10 patients undergoing laparoscopic cholecystectomy (group 1)
and five control patients (group 2). We measured heart rate, arterial
pressure, right atrial pressure (RAP), cardiac index (CI), systemic
vascular resistance index (SVRI), intrathoracic pressure (ITP), plasma
osmolality, adrenaline, noradrenaline and arginine vasopressin (aVP)
concentrations, and serum renin activity (SRA), and calculated the atrial
transmural pressure gradient (ATPG). We recorded significant decreases in
mean arterial pressure (MAP), SVRI and CI in both groups (P < 0.05)
after induction of anaesthesia. MAP and SVRI increased (P < 0.01) while
CI decreased further in group 1 patients during the pneumoperitoneum. In
group 1 plasma aVP concentration increased after insufflation of the
pneumoperitoneum to a level sufficient to cause the recorded haemodynamic
changes. ATPG decreased in group 1 patients during the pneumoperitoneum and
this is a recognized trigger for aVP release.
CLINICAL INVESTIGATIONS
Role of vasopressin in the haemodynamic response to laparoscopic cholecystectomy
University Department of Anaesthesia, University Hospital, Queens Medical Centre, Nottingham NG7 2UH
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