A reappraisal of thyroid surgery under local anaesthesia: Back to the future?

Background : Thyroid surgery is usually performed under general anaesthesia. However, for a selected group of patients, local anaesthesia may be preferable. The aim of this study was to review the authors' experiences with local anaesthesia with regard to the safety and outcome of this approach. Methods : A total of 65 consecutive patients who underwent primary thyroid surgery were accrued prospectively into this study from May to December 1999. A field block with 0.5% bupivacaine and adrenaline in 1:200 000 dilutions was given in all cases. In addition, light sedative and narcotics were given as necessary to achieve patient comfort and cooperation. The pain experienced during surgery was recorded using a visual analogue scoring system on a scale of 1-10. Results : Unilateral thyroid resection was performed in 58 patients, isthmectomy in four patients and bilateral thyroid resection in three patients, two of which were in their second trimester of pregnancy diagnosed with papillary thyroid cancer. There were 55 women and 10 men with an average age of 38.2 years (range: 18-67 years). No conversion to general anaesthetic was needed, and the mean operating time was 80 min. The postoperative recovery was quick with this technique and, of interest, 22 (33.9%) patients were discharged within 6 h following the surgery. Overall 62 (95.4%) patients were discharged in the first 24 h and three (4.6%) patients after 24 h. There were no significant postoperative complications encountered except for wound infection in two (3.1%) patients. Conclusions : Thyroid surgery under local anaesthesia can be performed safely in a selected group of patients. It offers an effective alternative approach to general anaesthesia and is associated with low morbidity and high levels of patient satisfaction.