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Otorinolaringologia 2014 March;64(1):23-6

Copyright © 2014 EDIZIONI MINERVA MEDICA

lingua: Inglese

Hearing loss following spinal anesthesia: the effect of different volume infusion

Asadi H. K. 1, Farahani F. 2, Tahamtan M. 3

1 Department of Anesthesiology, School of Medicine, Hamedan University of Medical Sciences, Hamedan, Iran; 2 Associate Professor, Department of Otorhinolaryngology Head and Neck Surgery, School of Medicine, Hamedan University of Medical Sciences, Hamedan, Iran; 3 Farzan Clinical Research Institute, Tehran, Iran


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AIM: Spinal block may produce various complications such as nausea, vomiting, pain on site of injection, backache, urinary retention, headache, meningitis, nerve palsy, hearing loss and even cardiac arrest. However, hearing loss is a less and uncommon complication. The aim of this study was to compare auditory functions and hearing levels following spinal anesthesia using low volume and high volume fluid therapy.
METHODS: First A prospective study of 50 ASA I patients scheduled for spinal anesthesia for inguinal hernia surgery was selected. Pure tone audiometry (PTA) was performed for all the patients and the pre and post operative results were compared. PTA was measured from 125 to 8000 Hz. In the case group (N.=25), low volume fluid therapy (400 cc preloading followed by 3 L of 0.9% normal saline/24 h) was used. Whereas, in the control group (N.=25), high volume fluid therapy (600 cc preloading followed by 4.5 L of 0.9% normal saline/24 h) was administered.
RESULTS: Comparison of audiometries showed hearing loss (P<0.05) in 4 patients in control group but none in case group i.e. the frequency of hearing loss was significantly greater in the control group (16%) in comparison to the case group (0%).
CONCLUSION: The use of low volume fluid therapy is associated with a greater reduction in the mean hearing level compared to high volume fluid therapy.

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