OBJECTIVE: To establish the minimum quantity of air necessary to provoke the sense of smell using a rhinomanometer and to estimate the role of rhinomanometry in postlaryngectomy olfactory rehabilitation using the Polite Yawning Technique. SUBJECTS AND METHODS: Members of the Laryngectomised Patients' Club sponsored by the Clinic of Otorhinolaryngology and Head and Neck Surgery of CHCR Rijeka participated in the research. The study population comprised 100 subjects. The control group consisted of nonlaryngectomized patients of similar age and sex from the specialist outpatient department of the Clinic. Patients with significant nasal airway obstruction were excluded. The group consisted of 100 subjects. Rhinomanometry was used for measuring the air quantity separately for the right and the left nostril, while Smell Diskettes Olfaction test (SDOT) was used for testing the sense of smell. RESULTS: The difference in SDOT results prior to and after the introduction of Polite Yawning technique is statistically significant (P<0,001). The number of accurately guessed odours gets bigger (F=53,077) with each measurement. There was a significant difference between the three rhinomanometric measurements of airflow through the right (F=65,002; P<0,001) and the left nostril (F=75,465; P<0,001). Nasal airflow is enhanced with each measurement. Once the technique is mastered and nasal airflow established, the number of guessed odours grows rapidly. The bigger the quantity of air, the more odours are guessed. The minimum quantity of air is around 60 ccm/s. By the end of the research, 48 laryngectomized subjects and 56 control group subjects were normosmic. The difference between the total number of rehabilitated patients and normosmic control group subjects (Z=1,132; P=0,129) is not statistically significant. CONCLUSION: The Polite Yawning technique has proved to be an effective method in olfactory rehabilitation following total laryngectomy. The use of rhinomanometry objectifies the evaluation of olfactory rehabilitation efficiency and makes it easier to explain and implement the rehabilitation itself.