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- Title
Patient controlled analgesic therapy in the early postoperative period.
- Authors
Tamsen, A.; Hartvig, P.; Dahlström, B.; Lindström, B.; Holmdahl, M. Hson; Dahlström, B; Lindström, B; Holmdahl, M H
- Abstract
Fourteen patients with postoperative pain were allowed to self-administer preset doses of pethidine intravenously via a logic-controlled motor syringe. Plasma samples were collected during anaesthesia and the postoperative self-administration period, and the concentrations of pethidine and nor-pethidine were determined. Separate single-dose studies in eight patients yielded pharmacokinetic parameters which made possible computer simulations of continuous plasma concentration curves for the anaesthesia and postoperative self-administration period. The consumption of pethidine showed great interindividual variations with a mean consumption for the entire group of 26 mg per hour. The patients established steady-state plasma concentrations with far less than the maximum amount of pethidine allowed. The mean measured plasma concentration of pethidine which provided adequate analgesia was 738 +/- 149 ng/ml. Simulated and measured plasma concentrations were in close agreement. The individual mean drug consumption per hour during self-administration correlated closely with the individual elimination rate of pethidine. No serious side effects were observed. Thus, patient-controlled analgesic therapy offers an individualized analgesic supply to meet an analgesic demand which is governed by each patient's appreciation of pain.
- Subjects
SYRINGES; SELF medication; ISONIPECAINE; POSTOPERATIVE period; ABDOMINAL surgery; INTRAVENOUS injections; POSTOPERATIVE pain; PARTIAL pressure
- Publication
Acta Anaesthesiologica Scandinavica, 1979, Vol 23, Issue 5, p462
- ISSN
0001-5172
- Publication type
journal article
- DOI
10.1111/j.1399-6576.1979.tb01475.x