Moderate Hypotensive Anaesthesia for Reduction of Blood Loss During Total Hip Replacement

32 consecutive patients scheduled for total hip replacement

Moderate hypotensive halothane anaesthesia (systolic blood pressure reduced to 10.69-13.33 kPa in normotensive patients, and to 13.33-16.0 kPa in hypertensive patients by adjusting inspired halothane concentration and using supplementary fentanyl)

Neurolept anaesthesia (fentanyl and droperidol) with no attempt to reduce blood pressure below the level achieved with adequate anaesthetic doses

Peroperative blood losssurrogate