Acoustic reflex and general anaesthesia.

Abstract

Infant and small children are not always able to cooperate in impedance measurements. For this reason it was decided, -in special cases, -to perform acoustic reflex examination under general anaesthesia. The first report on stapedius reflex and general anaesthesia was published by Mink et al. in 1981. Under the effect of Tiobutabarbital, Propanidid and Diazepam there is no reflex response. Acoustic reflex can be elicited with Ketamin-hydrochlorid and Alphaxalone-alphadolone acetate narcosis. The reflex threshold remains unchanged and the amplitude of muscle contraction is somewhat increased. The method was used: 1. to assess the type and degree of hearing loss in children with cleft palate and/or lip prior to surgery. 2. to exclude neuromuscular disorders with indication of pharyngoplasties. 3. to quantify hearing level in children--mostly multiply handicapped--with retarded speech development. The results of Behavioral Observation and Impedance Audiometry are discussed and evaluated.

• Authors: Z Farkas
• Journal: Scandinavian audiology. Supplementum (Scand Audiol Suppl) Vol. 17 Pg. 43-6 ( 1983) ISSN: 0107-8593 [Print] Denmark
• PMID: 6577558 (Publication Type: Journal Article)

Chemical References

• thiobutabarbital
• Ketamine
• Alfaxalone Alfadolone Mixture
• Propanidid
• Thiopental
• Diazepam

Topics

• Acoustic Impedance Tests (methods)
• Alfaxalone Alfadolone Mixture (pharmacology)
• Anesthesia, General
• Diazepam (pharmacology)
• Humans
• Ketamine (pharmacology)
• Propanidid (pharmacology)
• Reflex, Acoustic (drug effects)
• Thiopental (analogs & derivatives, pharmacology)