\s=b\The short-term and long-term effects of total inferior turbinectomy on smell acuity was assessed in two groups of patients. Olfactory thresholds were determined by a three-way forced-choice method, using four odorants. Resection of obstructive inferior turbinates resulted in a decrease in olfactory thresholds in 22 of 24 tested patients. No deleterious effect on smell acuity was observed in 16 patients tested 2\m=1/2\years or more after surgery. Subjective assessment of olfactory acuity is unreliable. It is our intention to focus attention on an aspect of intranasal surgery not frequently reported. (Arch Otolaryngol Head Neck Surg 1986;112:195-197) Nasal obstruction results in im¬ paired olfactory function. This universally recognized relation be¬ tween anosmia or hyposmia and nasal obstruction is insufficiently appreci¬ ated by surgeons and has seldom been objectively assessed in relation to sur¬ gical interventions.1"3In a retrospective study, recently completed in our department, we assessed the long-term outcome of 150 patients who underwent bilateral total inferior turbinectomy (BTIT) for chronic nasal obstruction.4 Seventyseven of the patients operated on were specifically questioned about the effect of surgery on their sense of smell. Of this group, 39 patients (51% )were aware preoperatively of a reduced olfactory acuity, and 18 (46% ) of them reported an improvement in olfactory acuity postoperatively. Con¬ sequently, a controlled study was undertaken to objectively assess the short-term and long-term effect of the operation on olfactory thresholds. To obtain valid and reliable results we chose three widely used odorants free of trigeminal components. The fourth odorant was chosen because of the major trigeminal component it in¬ cludes and because we wanted to test the hypothesis that the operation would have a much lesser effect on trigeminal components. SUBJECTS AND METHODS
SubjectsThe short-term study included 24 patients, 18 being male and six female, aged 11 to 62 years (mean age, 32 years). Patients were operated on for hypertrophic obstructive inferior turbinâtes.Symptoms of nasal obstruction lasted from two to 18 years (mean, 4.8 years) preopera¬ tively. Two of the patients had suffered from bronchial asthma. None of the patients was on permanent drug therapy. Patients' olfactory detection thresholds were evaluated twice, the first time on the day of admission before surgery and again three months postoperatively.Subjective reports of olfactory acuity were obtained preoperatively and prior to threshold evaluation. Patients were asked to score their olfactory ability on a threepoint scale ranging from "normal" to "to¬ tally absent."In the long-term study, 16 patients par¬ ticipated, 12 men and four women, aged 21 to 54 years (mean age, 36 years). These patients were tested during a regular fol¬ low-up visit to the outpatient clinic. They were the first 16 patients to arrive at the clinic during the present study who had undergone BTIT at least 2 V¿ years previ¬ ously. The mean postoperati...