About 5% of the population exhibit functional anosmia and some studies have elucidated that the prevalence of olfactory impairment in adults older than 53 years can be upon 25%. Sinonasal diseases are among the most frequent causes of olfactory disorders. 

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Although systemic corticosteroids have shown therapeutic effects, the real benefit from the intranasal topical drug application can be compromised due to the small amount of the intranasal drops/spray that in fact reach the olfactory epithelium.

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According to a study conducted by Mori E. (1), by adopting the position named “Kaiteki”, which means comfortable in Japanese, nasal drops reach the olfactory cleft in 96% of the decongested cases and up to 75% of the non-decongested ones. This manoeuvre is easily performed by lying on one side with our head tilted downwards 20° to 30° and the chin turned upward 20° to 40° (Fig. 1). The drops are administered into the uppermost nostril aiming the superior margin of the nasal septal mucosa, remaining in that position for 30 seconds.