Long-term follow-up of olfactory loss secondary to head trauma and upper respiratory tract infection

Archives of Otolaryngology--head & Neck Surgery
H J Duncan, A M Seiden

Abstract

To determine the extent to which olfactory function can improve after loss induced by head trauma or a previous upper respiratory tract infection (URI) and the time for this improvement for more effective patient counseling. Patients initially evaluated at the University of Cincinnati (Ohio) Taste and Smell Center were reevaluated for olfactory loss with the University of Pennsylvania (Philadelphia) Smell Identification Test 1 to 5 years after initial testing. Changes in score on this test were used to indicate improvement in sensory function. Subjective information on olfactory ability and olfactory symptoms was also collected. University-based tertiary care center. Forty-one patients with olfactory loss induced by head trauma (20) or previous URI (21). Seven (35%) of 20 patients with head trauma improved on the smell test by 4 points or more. Fourteen of 21 (67%) patients with a previous URI had improved scores of this magnitude or more. A statistically significant correlation was noted between the amounts of improvement and length of follow-up for URI patients. Thirteen of these patients also reported improved olfactory function. These findings for patients with head trauma are consistent with other reports of recovery of (o...Continue Reading

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