nasal cycle


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nasal cycle

Respiratory physiology Alternating congestion and decongestion of the nasal airway that occurs in 70% of adults, controlled by the autonomic nervous system, and which may be affected by circadian changes in hormone levels, temperature, humidity, posture, and emotion; in the face of a unilateral fixed obstruction, the congestion phase of the side opposite the obstruction may be interpreted as an abnormality of the normal side or 'paradoxic nasal obstruction'
References in periodicals archive ?
To reduce bias by the nasal cycle, rhinomanometry and imaging were performed during the same cycle pre-and postoperatively.
At some point, the nasal cycle shifts to the other nostril.
The one-to-four hour nasal cycle results in the inferior turbinate on one side be- ing engorged for a time, followed by engorgement of the other side.
In a peer-reviewed article entitled "Pharmacokinetics and Pharmacodynamics of Intranasal Insulin Spray (Nasulin[TM]) Administered to Healthy Male Volunteers: Influence of the Nasal Cycle," the authors report that the intranasal insulin formulation was generally well tolerated, well absorbed and the drug can be administered without regard to the nasal cycle.
2,3) These patients have previously served as subjects of studies of changes in the nasal mucosa structure, (2) the nasal cycle, (3-5( blood flow, (6) and mucociliary transport.
Fisher et al used acoustic rhinometry to evaluate the nasal cycle, and they found that it is superior to the other methods because it does not disturb the natural state of the nasal cavity in these patients.
Detection of the nasal cycle with acoustic rhinometry: Techniques and applications, Otolaryngol Head Neck Surg 1999;120:238-47.
For a proper and efficient nasal cycle, the turbinates need a rigid septum to be their reference point.
To decrease the effects of the nasal cycle, our subjects were measured at approximately the same time of day at both testing sessions.
The most common structural abnormality is a deviated nasal septum, which can cause a sensation of chronic unilateral nasal congestion or congestion that fluctuates with the nasal cycle.
Measurements were taken of both sides of the nose and considered together to minimize any possible influence of the nasal cycle.
Researchers also presented results from two additional Bentley-sponsored studies to determine if smoking had any effect on the absorption of Nasulin in normal male smokers and non-smokers and to determine if there were any absorption differences due to the normal nasal cycles that occur between nostrils (alternating levels of mild congestion).