Nenäntulo

Nenäntulo is a Finnish term that literally combines nenä (nose) and tulo (arrival or entry). It is a specialized, relatively uncommon word used mainly in technical or medical contexts. In everyday Finnish the more common phrasing is nenän kautta tai intranasal (intranasal) administration, but nenäntulo may appear in discussions of routes of entry through the nasal passages.

In anatomy and physiology, nenäntulo describes the pathway by which air or substances enter the body through the nose. During breathing, air moves from the external nares into the nasal cavity, where it is warmed, humidified, and filtered before continuing to the pharynx and lower airways. The concept can be relevant when contrasting different routes of exposure or administration, such as oral, inhalational, or intranasal delivery.

In pharmacology and therapeutics, nenäntulo may refer to intranasal delivery of medications. This route is used for certain drugs that benefit from rapid absorption through the nasal mucosa or for patients who cannot take medications orally. Examples include some allergy medications, migraine treatments, or emergency antidotes. However, more common terminology in medical literature is intranasal administration or nasal delivery rather than the term nenäntulo itself.

The term is not a standard entry in all medical guidelines and may vary in usage between texts. When clarity is needed, it is advisable to use more widely understood phrases such as nenän kautta annostelu or intranasal delivery. See also: nasal anatomy, intranasal administration, routes of drug delivery.