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Vasorelaxant effect of opioid analgesics on the isolated human radial artery

Published online by Cambridge University Press:  01 March 2006

S. Gursoy ,
I. Bagcivan ,
M. K. Yildirim ,
O. Berkan  and
T. Kaya
S. Gursoy
Affiliation:
Cumhuriyet University School of Medicine, Department of Anesthesiology, Sivas, Turkey
I. Bagcivan
Affiliation:
Cumhuriyet University School of Medicine, Department of Pharmocology, Sivas, Turkey
M. K. Yildirim
Affiliation:
Cumhuriyet University School of Medicine, Department of Pharmocology, Sivas, Turkey
O. Berkan
Affiliation:
Cumhuriyet University School of Medicine, Department of Cardio-thoracic Surgery, Sivas, Turkey
T. Kaya
Affiliation:
Cumhuriyet University School of Medicine, Department of Pharmocology, Sivas, Turkey
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Extract

Summary

Background and objective: Arterial grafts are prone to vasospasm. Opioid analgesics are commonly used in the perioperative course of cardiac surgical procedures. Therefore, we investigated the direct effects of morphine, meperidine, fentanyl and remifentanil on the human radial artery. Methods: Radial artery segments, obtained from 20 patients, were precontracted with phenylephrine. Using the organ bath technique, the endothelium-independent vasodilatation was tested in vitro by addition of cumulative concentrations of morphine, meperidine, fentanyl and remifentanil in separate organ baths, in the presence or absence of naloxone. Indomethacin and NG-nitro-l-arginine methyl ester was added to all organ bath in order to determine the effects of prostaglandins and nitric oxide, respectively. Results: Morphine (10−8–10−4mol L−1), meperidine (10−10–10−6mol L−1), fentanyl (10−10–10−6mol L−1) and remifentanil (10−8–10−4mol L−1) caused a concentration-dependent vasorelaxation in the human being artery rings. The relaxations in the presence of naloxane did not change. The maximal relaxant effects of meperidine and fentanyl were significantly greater than those of morphine and remifentanil (P < 0.05). Conclusions: These findings indicate that morphine, meperidine, fentanyl and remifentanil produce concentration-dependent and endothelium-independent relaxations in human being radial artery rings. Meperidine and fentanyl are more potent relaxant agents than morphine and remifentanil in the human being radial artery in vitro.

Keywords

ANALGESICS OPIOID, morphine, meperidine, fentanyl, remifentanilSURGERY CARDIACCORONARY ARTERY BYPASS SURGERYRADIAL ARTERY
Type
Original Article
Information
European Journal of Anaesthesiology , Volume 23 , Issue 6 , June 2006 , pp. 496 - 500
Copyright
© 2006 European Society of Anaesthesiology

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