Detection of particles within the nasal airways during respiration
17
Citation
0
Reference
10
Related Paper
Citation Trend
Keywords:
Nostril
Particle deposition
Particle (ecology)
Deposition
Nasal passages
Nostril
Particle deposition
Particle (ecology)
Deposition
Nasal passages
Cite
Citations (17)
Acoustic rhinometry is a well-known method for evaluating nasal cavity patency using sound waves. The method produces graphical information on cross-sectional areas, the distances between these areas and the nostril and the nasal volume. We used this method to evaluate 40 children aged between 7 and 13 years old with complaints of nasal obstruction. All patients underwent endoscopic examination of the nasal cavity, and only children presenting with hypertrophic inferior nasal turbinates and with no history or clinical evidence of infectious rhinitis were included in the study. Using a modified method we obtained four distinct and constant cross-sectional areas along the nasal cavity and four corresponding distances from these areas to the nostril.
Acoustic Rhinometry
Nostril
Turbinates
Cite
Citations (8)
The objective of this study was to examine the effects of nasal passage characteristics on anterior particle deposition during cyclical breathing. Forty healthy, nonsmoking, adult subjects participated in this study. Nasal passage characteristics such as nostril length, width, angle, ellipticity, and minimum nasal cross-sectional area were measured. The subjects inhaled a polydisperse radioactively tagged aerosol (mass median aerodynamic diameter = 5.4 microns, geometric standard deviation [GSD] = 1.3) into the nose and exhaled through the mouth. The amount of radioactivity in the nose was measured immediately after inhalation and thereafter for 54 minutes. At 52.5 minutes, subjects wiped the accessible portion of the anterior nose to remove any remaining activity. The difference in activity at 52 and 54 minutes was used as a measure of activity removed during the nose wipe. Percentage of activity in the nasal passage at 52 minutes and percentage of activity removed with the nose wipe were considered surrogates for particles deposited in the anterior nasal passage. A multiple regression analysis showed that the degree of ellipticity of the nostrils was significantly related to particle deposition in the anterior nasal passage. These results suggest that ellipticity of the nostrils may be a determinant of the amount of particle deposition in the anterior nasal passage.
Nostril
Particle deposition
Nasal passages
Deposition
Particle (ecology)
Cite
Citations (31)
Summary Most lesions that affect the nasal cavity of the horse can be accessed via the nostril or via a frontonasal sinus flap but occasionally, surgical access to the mid‐portion of the nasal cavity is necessary. This case report describes the use of a centrally based, 3‐sided rhinotomy which provided good access to the ipsilateral nasal cavity and allowed for removal of abnormal tissue/foreign material in two horses. The nasal bone flap was preserved and only relatively mild intraoperative haemorrhage occurred which was controlled with nasal packing. Horses recovered well from surgery with an excellent long‐term cosmetic result.
Nostril
Sinus (botany)
Nasal passages
Nasal packing
Nasal discharge
Nasal bone
Cite
Citations (9)
Deposition
Particle deposition
Particle (ecology)
Olfactory mucosa
Nasal passages
Cite
Citations (22)
Abstract The authors aimed to evaluate the validity and characteristics of acoustic rhinometric tests by comparing the results with those of computed tomography (CT) of the nasal cavity. Cross‐sectional areas along the nasal cavity were measured by acoustic rhinometry (AR) and CT of the nasal cavity in 30 normal subjects. Cross‐sectional areas measured by each technique showed a statistically significant correlation. The two measurements showed a better linear correlation in the anterior part of the nasal cavity up to 24 mm from the nostril than in the posterior part of the nasal cavity beyond that point. Mean cross‐sectional areas measured by AR were constantly less than those measured by CT of the nasal cavity up to 33 mm from the nostril, whereas areas measured by AR were greater than those measured by CT scans beyond that point.
Acoustic Rhinometry
Nostril
Cite
Citations (107)
This study was performed to evaluate the relationship between nasal nitric oxide (NO) and changes in nasal cavity volume resulting from the topical application of xylometazoline and saline and between upright and supine posture. Nasal NO was measured using a fixed high flow technique that avoids contamination with lower airways NO. In nine healthy subjects nasal NO concentration was measured by a rapid response chemiluminescent analyzer. A tapered tube was inserted in one nostril, into which room air was insufflated to produce a constant flow of 100 mL/second; another tube was inserted into the opposite nostril for NO sampling (air exit side). Subjects were instructed to keep the vellum closed while NO was sampled through a sideport connected to the analyzer. Nasal cavity volume was measured by acoustic rhinometry from a segment of the acoustic pathway, 2 to 5 cm from the nostril. Nasal cavity volume and NO measurements were made at baseline, 15 minutes, and 60 minutes after intervention (administration of saline 0.9%, xylometazoline or posture changes on 3 consecutive days). Xylometazoline produced a significant increase in nasal cavity volume, together with a significant reduction in NO level at 15 and 60 minutes after intervention. In addition, the change from seated to supine position decreased the total nasal volume significantly, but without changes in nasal NO. No correlation was found between the magnitudes of changes in nasal NO and the changes in nasal volume. Topical application of xylomethazoline resulted in increased nasal cavity volume and reduced NO output. In contrast to previous published reports, a technique using high flow rate insufflation demonstrated an abscence of correlation between the magnitudes of changes in nasal NO and nasal cavity volume brought about by decongestant, saline, or posture.
Nostril
Acoustic Rhinometry
Supine position
Cite
Citations (25)
OBJECTIVE To evaluate the preoperative subjective and objective nasal ventilation function in patients with structural rhinitis,and to provide clinical evidence for surgery.METHODS Fifty six structural rhinitis patients and twenty-four normal controls whose assessment of nasal obstruction was achieved by visual analogue scale(VAS)before and after decongestion,and divided into two groups: group 1(n =30,VAS score7),group 2(n=26,VAS score7) and group 3(control group,n=24,VAS score=0).Three groups were used objective measurement including rhinomanometry and acoustic rhinometry to measure the first two minimum cross-sectional area of nasal cavity(MCA 1),MCA 2 of the bilateral nasal cavity and their distances from the nostrils(MD 1),MD 2,to measure the nasal volume of 5cm,2-5 cm and 5-7 cm from the nostril on both sides of nasal cavity(V 5),V 2-5,V 5-7,to calculate the ratio of the parameters of the two sides of the nasal cavity respectively,and to measure nasal resistance total(RT)of bilateral nasal cavity and calculate Rlr.Three groups were compared by using statistical test.RESULTS There were no significant statistic difference in MD 1,MCA 2,MD 2 and RT among three groups.All ratios were statistically significant except MD 1,V 5-7 among three groups.Group 1 had obvious difference compared with the other two groups.CONCLUSION It is an association between the degree of nasal obstruction and the abnormal structure of bilateral nasal cavity.VAS score and measurement of rhinomanometry and acoustic rhinometry should be as a conventional method to preoperative patients with structural rhinitis.
Acoustic Rhinometry
Nostril
Rhinomanometry
Cite
Citations (0)
Objective:To explore the long-term effect of rhinoplasty of nasal cavity improving nasal obstruction in patients with structural variation. Method:One hundred and six patients with structural rhinitis included this study whose assessment of nasal obstruction were achieved by visual analogue scale(VAS), and were divided into two groups: group1(n=56,VAS score >5), group 2(n=48,VAS score <5).They were measured by rhinomanometry and acoustic rhinometry recording the minimum cross-sectional area of nasal cavity(MCA), the distances from the nostrils(MD) and the nasal volume of 5 cm,2-5 cm,5-7 cm from the nostril(V5,V2-5,V5-7),then we calculated the ratio of the parameters of the two sides of the nasal cavity respectively, recorded nasal resistance and calculated Rlr. All patients were performed endoscopic rhinoplasty of nasal cavity and re-evaluated one-year later. Two groups were compared with statistical test.Result: The symptoms of twogroup patients improved satisfactorily after surgery. VAS scores and ratio of pre-operation of two groups had statistical differences except MD,V5-7,and group1 had more structural abnormalities compared with group 2.VAS scores and ratio of pre- and post-operation of group1 had statistically difference. Conclusion:Severity of nasal obstruction is related to structural variation of nasal cavity and the nasal plasty has certain clinical application value as its good long-term curative effects,the purpose of surgery is to restore symmetry of nasal cavity.
Acoustic Rhinometry
Nostril
Rhinomanometry
Deviated nasal septum
Cite
Citations (2)