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Randomized Controlled Trial
The effect of warming local anaesthetic on the pain of injection during sub-Tenon's anaesthesia for cataract surgery.
- M J Allen, C Bunce, and A H Presland.
- Moorfields Eye Hospital NHS Foundation Trust, London, UK. drmjallen@hotmail.co.uk
- Anaesthesia. 2008 Mar 1; 63 (3): 276-8.
AbstractIn a double blind, randomised controlled trial, we examined the effect of warming local anaesthetic solutions on the pain experienced by patients undergoing a sub-Tenon's block for cataract surgery. In all, 140 patients were randomly allocated to receive either local anaesthetic stored at room temperature (control group) or local anaesthetic warmed to 37 degrees C (study group). Pain scores were assessed using a verbal analogue scale from 0 to 10. There was no significant difference in pain scores between the two groups. We conclude that the practice of warming local anaesthetic prior to performing a sub-Tenon's block does not significantly reduce the amount of pain experienced by patients.
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