Annales françaises d'anesthèsie et de rèanimation
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Ann Fr Anesth Reanim · Jun 1999
[Delivery of desflurane by a Tec 6 vaporizer at a concentration superior to that posted on the regulating valve].
We report the case of a defective Tec 6 vaporizer (Datex-Ohmeda) which delivered higher concentrations of desflurane (end-tidal concentration: 3.5 vol%) than indicated by the vaporizer dial setting (2 vol%), at a fresh gas flow of 1 L.min-1. This condition was caused by a defective rotary control valve. Therefore it is essential to administer desflurane only in presence of a vapour analyser.
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We report a case of persisting suprascapular nerve palsy after surgery under general anaesthesia of short duration in a conventional position. Surgical exploration, eight months later, showed a suprascapular notch narrowed by a hypertrophied and calcified superior transverse ligament. Such a lesion and the practice of volley-ball by the patient are in favour of a pre-existing infraclinical neuropathy.