Anaesthesia for Endoscopic Sinus Surgery: A Survey of Anaesthesiologists in Restructured Hospitals in Singapore

Abstract

Introduction: A cross-sectional survey of anaesthesiologists in Singapore's restructured hospitals was conducted to explore strategies employed to obtain a bloodless surgical field during endoscopic sinus surgery. Methods: All practicing anaesthesiologists in public institutions in Singapore were invited to answer an anonymous questionnaire. A point of contact per institution assisted in distribution and collection of questionnaire forms over a nine-month period. Results: A total of 114 anaesthesiologists completed the survey (response rate 60%). It was observed that 64.9% of respondents do not routinely employ controlled hypotension for endoscopic sinus surgery. Sixty-seven point five per cent chose general anaesthesia without nitrous oxide as the preferred anaesthetic technique for endoscopic sinus surgery. Forty-seven point four per cent opined that anaesthetic technique made no significant difference to outcomes in endoscopic sinus surgery. The most commonly used narcotics in endoscopic sinus surgery by the respondents were morphine (59.6%) and fentanyl (54.4%). However, where total intravenous anaesthesia was adopted, 86.0% of respondents opted to use remifentanil. The most commonly used class of antihypertensives for controlled hypotension was beta-blockers (66.7%). Factors limiting the use of total intravenous anaesthesia were also explored. Conclusion: This survey identifies variations from current evidence in the anaesthetic management of endoscopic sinus surgery among anaesthesiologists in Singapore's public institutions. The reasons behind these variations, which could include surgical preferences, financial, logistical, cultural, and educational factors, should be explored and any issues found addressed as necessary.