British Journal of Anaesthesia, Vol 83, Issue 2 241-244, Copyright © 1999 by The Board of Management and Trustees of the British Journal of Anaesthesia
R. Likar, S. Kapral, H. Steinkellner, C. Stein and M. Schafer
We have examined if the analgesic effects of intra-articular morphine are
dose-dependent in patients undergoing elective arthroscopic knee surgery.
At the end of surgery, patients were allocated randomly to one of four
groups to receive intra-articular saline (n = 22), or morphine 1 mg (n =
24), 2 mg (n = 21) or 4 mg (n = 19). After operation, patients remained in
hospital overnight and pain intensity was assessed using a visual analogue
scale at 1, 2, 3, 6, 9, 12, 18 and 24 h after intra-articular injection.
Patients requesting additional analgesia received a loading dose of
piritramide 0.1 mg kg-1 i.v. and were connected to a PCA device using the
same drug. Increasing doses of intra-articular morphine were associated
with greater analgesic effects and less supplementary analgesic
requirements.
CLINICAL INVESTIGATIONS
Dose-dependency of intra-articular morphine analgesia
Abteilung fur Anaesthesiologie und Intensivmedizin and Abteilung fur Unfallchirurgie, Landeskrankenanstalten Klagenfurt, A-9026 Klagenfurt, Austria
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