sedation with subtenon injection of local anesthetic
Proceduresedation was induced with fentanyl a loading dose of propofol, followed by continuous infusion of propofol, 3-6 mg/k/h to deep sedation. A nasal tube was inserted to prevent airway obstruction. SubTenon's anaesthesia included "standard" solution is a mixture of 2% plain lignocaine, 0.5% plain bupivacaine, and 150 iu hyaluronidase 0.5%.