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Intravenous magnesium sulphate decreases postoperative tramadol requirement after radical prostatectomy

Published online by Cambridge University Press:  11 July 2006

P. Tauzin-Fin ,
M. Sesay ,
S. Delort-Laval ,
M. C. Krol-Houdek  and
P. Maurette
P. Tauzin-Fin
Affiliation:
DAR III Hôpital Pellegrin-Tondu Bordeaux, Bordeaux Cedex, France
M. Sesay
Affiliation:
DAR III Hôpital Pellegrin-Tondu Bordeaux, Bordeaux Cedex, France
S. Delort-Laval
Affiliation:
DAR III Hôpital Pellegrin-Tondu Bordeaux, Bordeaux Cedex, France
M. C. Krol-Houdek
Affiliation:
DAR III Hôpital Pellegrin-Tondu Bordeaux, Bordeaux Cedex, France
P. Maurette
Affiliation:
DAR III Hôpital Pellegrin-Tondu Bordeaux, Bordeaux Cedex, France
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Abstract

Summary

Background: The purpose of this study was to assess whether the addition of intravenous magnesium sulphate (Mg) at the induction of anaesthesia to a balanced anaesthetic protocol including wound infiltration, paracetamol and tramadol resulted in improved analgesic efficiency after radical prostatectomy. Methods: We conducted a randomized, double-blind, controlled study. Thirty ASA I or II males scheduled to undergo radical retropubic prostatectomy with general anaesthesia were prospectively assigned to one of the two groups (n = 15 each). The Mg group (Gr Mg) received 50 mg kg−1 of MgSO4 in 100 mL of isotonic saline over 20 min immediately after induction of anaesthesia and before skin incision. The patients in the control group (Gr C) received the same volume of saline over the same period. At the time of abdominal closure, wound infiltration with 190 mg (40 mL) of ropivacaine was performed in both groups. Pain was assessed by a 10-point visual analogue scale in the recovery room starting from the time of tracheal extubation. Standardized postoperative analgesia included paracetamol and tramadol administered via a patient-controlled analgesia device. Results: In the postoperative period, both groups experienced an identical pain course evolution. Cumulative mean tramadol dose after 24 h was 226 mg in the magnesium group and 446 mg in the control group (P < 0.001). Postoperative nausea occurred in two patients in each group. Two vs. eight patients required analgesic rescue in magnesium and control groups, respectively (P = 0.053). Conclusions: This study shows that intravenous magnesium sulphate reduces tramadol consumption when used as a postoperative analgesic protocol in radical prostatectomy.

Keywords

MAGNESIUMPAIN POSTOPERATIVECOMBINED MODALITY THERAPYANALGESIC OPIOID, sufentanil, tramadolSURGERY, urologicANAESTHETICS LOCAL, ropivacaineACETAMINOPHEN
Type
Original Article
Information
European Journal of Anaesthesiology , Volume 23 , Issue 12 , December 2006 , pp. 1055 - 1059
Copyright
2006 European Society of Anaesthesiology

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Footnotes

Presented in part in the World Congress of Anesthesiologists, Paris, France, 2004.

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