British Journal of Anaesthesia, 1992, Vol. 69, No. 6 558-561
© 1992 The Board of Management and Trustees of the British Journal of Anaesthesia
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HYPOXAEMIA AND PAIN RELIEF AFTER UPPER ABDOMINAL SURGERY: COMPARISON OF I.M. AND PATIENT-CONTROLLED ANALGESIA
Department of Anaesthesia, York District Hospital Wigginton Road, York YO3 7HE
1Correspondence to R.G.W.
Forty patients recovering from upper abdominal surgery were allocated randomly to receive i.m. morphine 0.15 mg kg1 as required or patient-controlled analgesia (PCA), with i.v. morphine 1 mg and a 5-min lock out time. Arterial oxygen saturation (Sp02) was measured continuously the night before and for 24 h immediately after surgery. A significantly greater proportion of patients in the PCA group (nine of 19) rated their analgesia as excellent compared with the i.m. group (two of 20) (P < 0.05). There was no significant difference in the incidence of postoperative hypoxaemia in the two treatment groups. Severe postoperative hypoxaemia (Sp02 <85% for more than 6 min h1 ) was seen in three patients receiving i.m. analgesia and one patient in the PCA group.
*Present address: Royal Hallamshire Hospital, Sheffield
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