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British Journal of Anaesthesia, Vol 76, Issue 1 111-115, Copyright © 1996 by The Board of Management and Trustees of the British Journal of Anaesthesia

LABORATORY INVESTIGATIONS

A perfusion system for in vitro measurement of human cilia beat frequency

D. A. Selwyn, A. Gyi, J. H. Raphael, A. Key and J. A. Langton
University Department of Anaesthesia, Leicester Royal Infirmary, Leicester LE1 5WW

We have designed and built a perfusion system and perfusion chamber to allow investigation of the effects of anaesthetic agents on human cilia in vitro. Using this system, samples of human respiratory cilia can be maintained in a stable and controlled environment for several hours. We measured cilia beat frequency of nasal respiratory epithelium from 10 healthy volunteers; cilia beat frequency was constant over a 4-h period, and measurements were found to be in good agreement with previously published work [1]. In a separate study we investigated the effect of a sleep dose of propofol on cilia beat frequency in samples from six patients undergoing minor surgery; samples were obtained before and immediately after induction of anaesthesia with propofol 2-3 mg kg-1. There was no statistically significant difference in cilia beat frequency between data obtained before and after induction with propofol.
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