Nasal obstruction can be monitored objectively by measurement of nasal airflow, as evaluated by nasal peak flow, or as airways resistance/conductance as evaluated by rhinomanometry. Peak flow can be measured during inspiration or expiration. Of these measurements, nasal inspiratory peak flow is the best validated technique for home monitoring in clinical trials. The equipment is portable, relatively inexpensive, and simple to use. One disadvantage, however, is that nasal inspiratory peak flow is influenced by lower airway as well as upper airway function. Rhinomanometry is a more sensitive technique that is specific for nasal measurements. The equipment, however, requires an operator, is more expensive, and is not portable. Thus, it is applicable only for clinic visit measures in clinical trials. Measurements require patient cooperation and coordination, and not all can achieve repeatable results. Thus, this objective measure is best suited to laboratory challenge studies involving smaller numbers of selected volunteers. A nonphysiological measure of nasal patency is acoustic rhinometry. This sonic echo technique measures internal nasal luminal volume and the minimum cross-sectional area. The derivation of these measures from the reflected sound waves requires complex mathematical transformation and makes several theoretical assumptions. Despite this, however, such measures correlate well with the nasal physiological measures, and the nasal volume measures have been shown to relate well to results obtained by imaging techniques such as computed tomography scanning or magnetic resonance imaging. Like rhinomanometry, acoustic rhinometry is not suitable for home monitoring and can be applied only to clinic visit measures or for laboratory nasal challenge monitoring. It has advantages in being easy to use, in requiring little patient cooperation, and in providing repeatable results. In addition to nasal obstruction, allergic rhinitis is recognized to be associated with impaired mucociliary clearance and altered nasal responsiveness. Measures exist for the monitoring of these aspects of nasal dysfunction. Although measures of mucociliary clearance are simple to perform, they have a poor record of reproducibility. Their incorporation into clinical trials is thus questionable, although positive outcomes from therapeutic intervention have been reported. Measures of nasal responsiveness are at present largely confined to research studies investigating disease mechanisms in allergic and nonallergic rhinitis. The techniques are insufficiently standardized to be applied to multicenter clinical trials but could be used in limited-center studies to gain insight into the regulatory effects of different therapeutic modalities.

The present study demonstrates highly significant associations between the subjective sensation of nasal obstruction and corresponding measures for nasal cavity volume, area, and airflow. We conclude that AR and PNIF are valuable objective instruments for evaluation of subjective nasal obstruction.

NAP in the MM for 5 days significantly reduced the extent of adhesions in MM compared with saline irrigation alone. NAP did not cause additional discomfort.

The prevalence of occupational rhinitis varied between 23% and 50%, depending on the criteria used. The occurrence of nasal symptoms was found to precede the development of lower airway symptoms. Occupational rhinitis, both IgE- and non-IgE-mediated, was associated with asthma symptoms. The most frequent causes of sensitization (20%) were different species of storage mites. Storage mite sensitization was related to occupational rhinitis and work exposure.

Crusts in the middle meatus after sinus surgery is associated with postoperative adhesions. Debridement of the nasal cavity reduces crusts and postoperative adhesions significantly compared with saline irrigation only. However, the procedure induces more postoperative nasal pain.

Our study indicates statistically significant associations between nasal cavity dimensions and PNIF. The most important structural determinant for PNIF is the minimal cross-sectional area of the nasal cavity.

We have clearly demonstrated an association between subjective nasal obstruction and reversible congestion of the nasal mucosa by employing the NCI. The measure has proven to be useful for evaluating patients with complaints of nasal obstruction.

To compare the long-term effects of different postoperative treatment regimes after functional endoscopic sinus surgery (FESS), we performed a randomized controlled trial. Inclusion criteria were chronic rhinosinusitis with (CRSwNP) or without (CRS-NP) bilateral nasal polyps and acute recurrent rhinosinusitis (ARR). All patients (male/female = 56/65; mean age = 42.8 years; age range 18-73 years) underwent sinus surgery for the first time. The patients included in 2004 were allocated to a packing in middle meatus for 5 days or saline irrigation only postoperatively. The patients included in 2005 were randomized to debridement 6 and 12 days postoperatively or saline irrigation. At baseline and 56 weeks (32-77) postoperatively, the patients reported symptoms such as nasal congestion, facial pain, headache, and change in sense of smell, nasal discharge, sneezing and reduced general condition on visual analogue scale (VAS). We used ANCOVA to compare symptom improvement. Among patients with CRSwNP, nasal congestion and sneezing improved, respectively, 20 mm (P value = 0.041) and 18 mm (P value = 0.011) more in the debridement group than in the saline irrigation group. Although a packing had positive effects on the symptom improvement they were not significant. Patients with CRSwNP, who had undergone debridement after FESS, had significantly larger symptom improvement 56 weeks after surgery than patients who had only done saline irrigation.