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Canadian Journal of Anesthesia, Vol 44, 830-835, Copyright © 1997 by Canadian Anesthesiologists' Society

ARTICLES

Low incidence of the oculocardiac reflex and postoperative nausea and vomiting in adults undergoing strabismus surgery

MR Tramer, T Fuchs-Buder, A Sansonetti and K Rifat
Department of Anaesthesiology, Clinical Pharmacology and Surgical Intensive Care, University Hospital Geneva, Switzerland.

PURPOSE: To investigate the incidence of the oculocardiac reflex (OCR), and of postoperative nausea and vomiting (PONV) in adults undergoing strabismus surgery. METHODS: Adults (18-86 yr) undergoing inpatient strabismus surgery received 10 micrograms.kg-1 atropine and 10 micrograms.kg-1 altentanil iv and were randomly allocated to: (A) 5 mg.kg-1 thiopentone iv, isoflurane/N2O maintenance; (B) 3 mg.kg-1 propofol iv, propofol/N2O maintenance (10-14 mg.kg-1.hr-1); 3 mg.kg-1 propofol iv, propofol/air/O2 maintenance (10-14 mg.kg-1.hr-1). Analyses were with the number-needed-to-treat/harm. RESULTS: In 97 adults the absolute risk of OCR (13-20%) and PONV (21-31% after 24 hr) was low, with no differences between groups. Number-needed-to-treat to prevent PONV with propofol with or without N2O compared with thiopentone-isoflurane was 7 to 11. Number-needed-to-harm for one OCR with propofol compared with thiopentone-isoflurane was 17. CONCLUSION: Adults undergoing strabismus surgery with prophylactic atropine had a low risk of OCR and PONV, independent of the anaesthetic technique used.


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Copyright © 1997 by the Canadian Anesthesiologists' Society.