scholarly journals The effect of decongestion on nasal airway patency and airflow

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Qiwei Xiao ◽  
Alister J. Bates ◽  
Raul Cetto ◽  
Denis J. Doorly
Keyword(s):  
Nasal Airway ◽  
Nasal Resistance ◽  
Nasal Airflow ◽  
Cross Sectional ◽  
Airway Patency ◽  
Flow Rates ◽  
High Resolution Mri ◽  
Nasal Anatomy ◽  
Before And After ◽  
Flow Through

AbstractNasal decongestant reduces blood flow to the nasal turbinates, reducing tissue volume and increasing nasal airway patency. This study maps the changes in nasal anatomy and measures how these changes affect nasal resistance, flow partitioning between superior and inferior cavity, flow patterns and wall shear stress. High-resolution MRI was applied to capture nasal anatomy in 10 healthy subjects before and after application of a topical decongestant. Computational fluid dynamics simulated nasal airflow at steady inspiratory flow rates of 15 L.min$$^{-1}$$ - 1 and 30 L.min$$^{-1}$$ - 1 . The results show decongestion mainly increases the cross-sectional area in the turbinate region and SAVR is reduced (median approximately 40$$\%$$ % reduction) in middle and lower parts of the cavity. Decongestion reduces nasal resistance by 50$$\%$$ % on average, while in the posterior cavity, nasal resistance decreases by a median factor of approximately 3 after decongestion. We also find decongestant regularises nasal airflow and alters the partitioning of flow, significantly decreasing flow through the superior portions of the nasal cavity. By comparing nasal anatomies and airflow in their normal state with that when pharmacologically decongested, this study provides data for a broad range of anatomy and airflow conditions, which may help characterize the extent of nasal variability.

The effects of D and L Isomers of menthol upon nasal sensation of airflow

1988 ◽  
Vol 102 (6) ◽  
pp. 506-508 ◽  
Author(s):  
R. Eccles ◽  
D. H. Griffiths ◽  
C. G. Newton ◽  
N. S. Tolley
Keyword(s):  
Sensory Nerve ◽  
Nerve Endings ◽  
Nasal Airway ◽  
Nasal Airflow ◽  
Airway Patency ◽  
Sensory Nerve Endings ◽  
Before And After ◽  
Subjective Measurements

AbstractObjective and subjective measurements of nasal airflow were made before and after inhalation of Vanilla, D-Menthol and L-Menthol separately. Despite the fact that the menthol isomers were mirror images of one another, only L-Menthol produced the sensation of increased nasal airway patency. No objective change in resistance was found after inhaling either D-Menthol, L-Menthol or the vanilla control. These findings demonstrate that L-Menthol exerts a specific action upon nasal sensory nerve endings, which are responsible for the subjective appreciation of nasal airflow.

Objective Assessment of the Breathe-Right Device during Exercise in Adult Males

1997 ◽  
Vol 11 (5) ◽  
pp. 393-398 ◽  
Author(s):  
Louis G. Portugal ◽  
Rajeev H. Mehta ◽  
Bonnie E. Smith ◽  
Jaishiri B. Sabnani ◽  
Matthew J. Matava
Keyword(s):  
African American ◽  
Objective Assessment ◽  
Acoustic Rhinometry ◽  
Nasal Airway ◽  
Nasal Resistance ◽  
Adult Males ◽  
Nasal Breathing ◽  
Cross Sectional ◽  
American Group ◽  
Paradoxical Worsening

In order to improve nasal breathing during competition, many athletes recently have been wearing a spring-loaded, external nasal dilator referred to as the Breathe-Right device (BRD). Although there are many subjective claims that this device improves breathing during exercise, there are currently no controlled studies documenting its efficacy. To determine objectively whether the device improves the nasal airway, 20 subjects (10 Caucasian and 10 African-American) were studied during rest and after 15 minutes of exercise using anterior rhinomanometry and acoustic rhinometry to measure changes in airway resistance and minimal cross-sectional area, respectively. We found that the BRD exerts its main effect in the region of the nasal valve improving the airway an overall 21% in our group of subjects. This anatomic improvement in nasal airway resulted in an overall 27% reduction in nasal resistance in the Caucasian group. However, in the African-American group, a wider range of resistance changes was observed with application of the BRD with significant improvement in nasal resistance in some subjects but paradoxical worsening in others. In the African-American group as a whole, no significant change in nasal resistance occured with application of the BRD. These measured differences are likely due to variations in nasal anatomy that exist not only between races but also between individuals within a given race. In addition, this study confirms the well known decongestant effects of exercise providing anatomic data with acoustic rhinometry not previously documented in the literature. Overall improvement in nasal airway seen with application of the BRD occured independent of these exercise-related decongestant effects.

Comparison of Nasal Airway Patency Changes after Treatment with Oxymetazoline and Pseudoephedrine

1987 ◽  
Vol 1 (2) ◽  
pp. 87-94 ◽  
Author(s):  
John T. Connell ◽  
M. Ines Linzmayer
Keyword(s):  
Nasal Congestion ◽  
Rapid Onset ◽  
Nasal Airway ◽  
Nasal Airflow ◽  
Night Time ◽  
Duration Of Action ◽  
Airway Patency ◽  
Drug Of Choice

Oxymetazoline (Afrin) and pseudoephedrine (Sudafed) were compared by rhinomanometric measurements using nasal airflow, a parameter of nasal airway patency, and therefore airway congestion. Oxymetazoline had a more rapid onset and duration of action, greater improvement in airway patency, and longer action than pseudoephedrine, the best of the oral decongestants. The decongestive effect was more reliable for oxymetazoline with 28 of 29 subjects experiencing some degree of decongestion compared to 21 of 30 for pseudoephedrine. Utilizing a combination of oral and topical decongestants may result in the most logical regimen for treatment of nasal congestion. Oxymetazoline is the drug of choice for night time decongestion.

Nasal airflow in inspiration and expiration

1990 ◽  
Vol 104 (6) ◽  
pp. 473-476 ◽  
Author(s):  
Laura Viani ◽  
Andrew S. Jones ◽  
Ray Clarke
Keyword(s):  
Flow Rate ◽  
Peak Flow ◽  
Phase Relationship ◽  
Low Flow ◽  
Airflow Rate ◽  
Nasal Resistance ◽  
Nasal Airflow ◽  
Flow Rates ◽  
Induced Changes ◽  
Peak Inspiratory Flow Rate

AbstractInspiratory and expiratory airflow rates were measured in 30 subjects during quiet respiration (at a pressure gradient of 150 Pa) and at peak flow rates.For low flow rates airflow rate was greater for inspiration than for expiration. Conversely at peak flow rates flow was greatest during expiration. Thus there was a reversal in the phase relationship between inspiration and expiration as flow rate increased.It was also found that peak inspiratory flow rate correlated better with values for nasal resistance than did peak expiratory flow rate. Flow rate measured by rhinomanometry during quiet respiration was more sensitive to physiologically induced changes in nasal resistance than was peak flow rate.The findings are discussed with reference to previous work on the physiology of nasal airflow.

scholarly journals Computational Fluid Dynamics Analysis of Nasal Airway Changes after Treatment with C-Expander

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Wang Xiao ◽  
Siling Liu ◽  
Yanqin Lu ◽  
Lei Lei ◽  
Ning Liu ◽  
...  
Keyword(s):  
Maximum Velocity ◽  
Study Data ◽  
Nasal Airway ◽  
Nasal Resistance ◽  
Effective Treatment Modality ◽  
Computational Fluid Dynamics Analysis ◽  
Before And After ◽  
Reduce Life Expectancy ◽  
Nasal Pressure ◽  
Age Range

The use of the C-expander is an effective treatment modality for maxillary skeletal deficiencies which can cause ailments and significantly reduce life expectancy in late adolescents and young adults. However, the morphological and dynamic effects on the nasal airway have not been reported. The main goal of this study was to evaluate the nasal airway changes after the implementation of a C-expander. A sample of nine patients (8 females, 1 male, age range from 15 to 29 years) was included. The morphology parameters and nasal airway ventilation parameters of pretreatment and posttreatment were measured. All study data were normally distributed. A paired t -test was used to evaluate the changes before and after treatment. After expansion, the mean and standard deviation values of intercanine maxillary width (CMW) and intermolar maxillary width (MMW) increased from 35.75 ± 2.48  mm and 54.20 ± 3.17  mm to 37.87 ± 2.26  mm ( P < 0.05 ) and 56.65 ± 3.10  mm ( P < 0.05 ), respectively. The nasal cavity volume increased from 20320.00 ± 3468.25  mm3 to 23134.70 ± 3918.84  mm3 ( P < 0.05 ). The nasal pressure drop decreased from 36.34 ± 3.99  Pa to 30.70 ± 3.17  Pa ( P < 0.05 ), while the value of the maximum velocity decreased from 6.50 ± 0.31  m/s to 5.85 ± 0.37  m/s ( P < 0.05 ). Nasal resistance dropped remarkably from 0.16 ± 0.14  Pa/ml/s to 0.08 ± 0.06  Pa/ml/s ( P < 0.05 ). The use of C-expander can effectively broaden the area and volume of the nasal airway, having a positive effect in the reduction of nasal resistance and improvement of nasal airway ventilation. For patients suffering from maxillary width deficiency and respiratory disorders, a C-expander may be an alternative method to treat the disease.

scholarly journals A Study on the Effects of Polite Yawning Technique on Rehabilitation of Olfaction After Total Laryngectomy

2020 ◽  
Vol 13 (7) ◽  
Author(s):  
Ehsan Khadivi ◽  
Kamran Khazaeni ◽  
Leila Vazifeh Mostaan ◽  
Maryam Salehi ◽  
Iraj Vakili ◽  
...  
Keyword(s):  
Total Laryngectomy ◽  
Training Session ◽  
Cross Sectional Study ◽  
Psychological Consequences ◽  
Nasal Airflow ◽  
Cross Sectional ◽  
Significance Level ◽  
Before And After ◽  
Swallowing Difficulties ◽  
Difficulty Score

Background: Laryngeal cancer is one of the most common head and neck cancers for which total laryngectomy is the preferred treatment in advanced stages. Major disabilities of this surgical procedure include loss of voice and nasal function, swallowing difficulties, and psychological consequences. Objectives: This study aimed to investigate the effect of the Polite Yawning technique on olfactory quality in patients undergoing total laryngectomy. Methods: In this cross-sectional study, after total laryngectomy, the patients with olfactory dysfunction were enrolled and the quality of olfaction was evaluated by the Quick Odor Detection test before and after receiving the Nasal Airflow Inducing Maneuver technique training. Statistical analysis was performed using SPSS 21 software by the Wilcoxon or McNemar’s test. The significance level was considered for P ≤ 0.05. Results: A total of 40 patients were evaluated. The mean age was 55.98 ± 6.27 years. Eighty-five percent of the patients were male (n = 34). The difficulty score in learning maneuvering was 2.5 ± 1.3, and 90% had no problem with learning it. Before maneuver, none of the patients had normal olfaction and had hyposmia mostly (n = 32, 80%). Immediately after the maneuver, there was a sensation of smell in all patients and the rate of hyposmia in patients was reduced to 65% (P = 0.008). Normal olfactory status was reported in half of the patients one month after the maneuver (21 patients, 52.5%, P = 0.0001), and there was a sense of smell in all patients (P = 0.0001). Conclusions: The results proved that olfactory quality can be rehabilitated after laryngectomy by the nasal airflow-inducing maneuver (the “Polite Yawning” technique). It is a patient-friendly method; however, a single training session is probably insufficient and most patients may need more training sessions.

Performance and work of nasal breathing

2021 ◽  
Vol 11 (41) ◽  
pp. 11-17
Author(s):  
Anita Bergmane ◽  
Klaus Vogt ◽  
Biruta Sloka
Keyword(s):  
Airway Resistance ◽  
Interquartile Range ◽  
Nasal Airway ◽  
Nasal Resistance ◽  
Nasal Breathing ◽  
First Line ◽  
Significant Difference ◽  
Before And After ◽  
Potential Parameters ◽  
Inspiratory Work

Abstract OBJECTIVE. To evaluate performance (Q) and work (W) of nasal breathing as potential parameters in functional diagnostic of nasal obstruction. MATERIAL AND METHODS. We included in our study 250 patients and we measured by 4-phase-rhinomanometry with decongestion test. We calculated performance Q of the “representative breath” in inspiration and expiration and in total breath, maximal performance Q (Qmax), Work W of nasal breathing in mJ and in mJ/litre and Q in J/min. RESULTS. The interquartile range of Win for representative breath before decongestion is 356 mJ/l, Wex 308 mJ/l, while after decongestion Win is 264 mJ/l and Wex 220 mJ/l. There is no significant difference between work before and after decongestion (p<0.001). Interquartile range for nasal breathing Q before decongestion is 19.2 J/min and after – 14.3 J/min. A significant correlation exists between logarithmic vertex resistance for inspiration and expiration and Qmax for inspiration and expiration (p<0.001). That means that the performance required by breathing depends in the first line on nasal resistance. CONCLUSION. Inspiratory work is 1.2 times higher than expiration work. Increase in nasal airway resistance is followed by increase in maximal nasal performance.

Changes in Speech Breathing Following Cochlear Implant in Postlingually Deafened Adults

1991 ◽  
Vol 34 (3) ◽  
pp. 526-533 ◽  
Author(s):  
Harlan Lane ◽  
Joseph Perkell ◽  
Mario Svirsky ◽  
Jane Webster
Keyword(s):  
Cochlear Implants ◽  
Flow Rate ◽  
Low Flow ◽  
Average Flow Rate ◽  
Cross Sectional ◽  
Lung Volumes ◽  
Flow Rates ◽  
Average Value ◽  
Speech Breathing ◽  
Before And After

Three postlingually deafened adults who received cochlear implants read passages before and after their prostheses were activated while their lung volumes were measured with an Inductive plethysmograph that transduced the cross-sectional areas of the speaker’s chest and abdomen. Lung volumes at the initiation and termination of the speakers’ expiratory limbs, their average air flow, and the volume of air they expended per syllable were derived from tracings of calibrated lung volume displayed by computer. The activation of the speakers’ cochlear prostheses was followed in every case by a significant change in average airflow, which rose for two subjects with initially low flow rates and fell for one subject who had a much higher average preimplant flow rate. These changes in average flow rate were accompanied by corresponding changes in volume of air expended per syllable, statistically reliable in two of the three cases. There were no significant changes in the levels at which speakers initiated their expiratory limbs, but one speaker, after his prosthesis was activated, reliably increased the level of air in his lungs at the end of expiratory limbs to an average value that no longer required him to draw on expiratory reserve volume.

Determinants and Evaluation of Nasal Airflow Perception

2017 ◽  
Vol 33 (04) ◽  
pp. 372-377 ◽  
Author(s):  
Kevin Hur ◽  
Kai Zhao ◽  
Donald Leopold ◽  
Bozena Wrobel ◽  
Jasper Shen
Keyword(s):  
Treatment Outcome ◽  
Airway Obstruction ◽  
Airway Resistance ◽  
Dynamic Change ◽  
Acoustic Rhinometry ◽  
Nasal Airway ◽  
Nasal Airflow ◽  
Nasal Patency ◽  
Airway Patency

AbstractThe sensation of nasal airflow, or nasal airway patency, is an important consideration in the treatment outcome of nasal airway obstruction. Clinicians striving to optimize the nasal passageway have relied on techniques aimed at decreasing peak airway resistance across nasal valves. Nonetheless, the evaluation of the nasal airway is multifaceted, and the objective determinants of subjective nasal patency remain incompletely elucidated. While rhinomanometry, peak nasal inspiratory airflow, and acoustic rhinometry have traditionally been used in research to focus on resistance as a measure of patency, an emerging body of evidence suggests that subjective nasal patency is more significantly correlated to the dynamic change of nasal mucosal temperature. The objective of this review is to provide the technical background on nasal airflow perception and intranasal trigeminal function as crucial to those performing functional and aesthetic rhinosurgery.

Nasal resistance asymmetry as a predictor of satisfaction following nasal airway obstruction surgeries

2017 ◽  
Vol 6 (4) ◽  
pp. 1-9
Author(s):  
Monika Prus ◽  
Jarosław Wysocki ◽  
Marta Krasny ◽  
Kazimierz Niemczyk
Keyword(s):  
Airway Obstruction ◽  
Subjective Assessment ◽  
Subjective Perception ◽  
Nasal Airway ◽  
Nasal Resistance ◽  
Nasal Patency ◽  
Self Evaluation ◽  
Before And After ◽  
The Right ◽  
Medical University

Patients’ subjective assessment of nasal patency often does not correspond to the objective results of functional and imaging examinations. The objective of this study was to identify the rhinometry (AR) and rhinomanometry (RMM) parameters that were best correlated to patients’ self-evaluation of nasal patency before and after nasal airway obstruction surgery. The study material consisted of RMM and AR results as well as SNOT-20 self-evaluation questionnaires completed by 233 patients presenting with rhinological problems and routinely diagnosed at the RMM Lab of the Department and Clinic of Otolaryngology of the Medical University of Warsaw. Data were collected from 70 females (31.4%) aged 18 through 81 years and 153 males (68.6%) aged 16 through 81 years. The results were subjected to statistical analysis by a licensed statistician using the Statistica 10 software package. A statistically significant relationship was demonstrated between the subjective perception of nasal patency and RMM results. The higher the asymmetry of air flow within the left and the right nasal cavity, the higher the perceived restriction of nasal patency. Significant differences were observed between patients reporting maximum discomfort regarding impaired nasal patency and the remaining patients: the former were characterized by nasal resistance values being several-fold higher than that observed in the latter while nearly always improving after nasal airway obstruction surgeries. No significant reflection of patients’ self-evaluation of nasal patency was found in the acoustic rhinometry measurements.

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