An obturator is a curved rod that fits inside the tracheal cannula, which is a tube inserted into the trachea during tracheostomy. Tracheostomy is a surgical procedure that creates an opening in the ...
Although various methods of local anaesthesia are in use for ophthalmic surgery, sub-Tenon’s anaesthesia is the most popular due to its safety and efficacy. A variety of cannulae have been described ...
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