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Canadian Journal of Anesthesia, Vol 44, 658-661, Copyright © 1997 by Canadian Anesthesiologists' Society

ARTICLES

Difficult intubation and brain-stem anaesthesia

C Ananthanarayan, AF Cole and M Kazdan
Department of Anaesthesia, Mount Sinai Hospital, University of Toronto, Ontario.

PURPOSE: To present a case of difficult intubation with brainstem anaesthesia after retrobulbar block with bupivacaine and lidocaine and sedation with midazolam and to point out that close monitoring and timely treatment is important in preventing an unfavourable outcome. CLINICAL FEATURES: An 82-yr-old man with treated hypertension and stable angina was scheduled for cataract extraction. Physical examination revealed a class 2 airway. He had a retrobulbar block after topical tetracaine drops, with bupivacaine 0.5% and lidocaine 2% with hyaluronidase under sedation with 1 mg midazolam. Five minutes after the block, respiration slowed, he became unresponsive and oxygen saturation decreased to 80%. Immediate ventilation with mask without additional oxygen improved saturation. Attempted tracheal intubation failed: the epiglottis could not be visualized despite flaccid jaw and extremities. A laryngeal mask airway was placed which was leaking and adequate ventilation could not be achieved but a second laryngeal mask airway was placed successfully. CONCLUSION: This case emphasizes the need for dose monitoring and personnel capable of managing the difficult airway when intra-orbital anaesthesia is used.


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Copyright © 1997 by the Canadian Anesthesiologists' Society.