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Τρίτη 16 Μαρτίου 2021

The Recumbent Position Affects Nasal Resistance: A Systematic Review and Meta‐Analysis

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Objective

Nasal diseases are among the main motives for the early discontinuation of continuous positive airway pressure therapy and for long‐term therapeutic compliance with mandibular advancement device. Although our clinical experience leads us to the belief that recumbency impacts nasal airflow in some patient populations, there is no consensus regarding the magnitude of this effect and the specific group of patients who are the most affected by this condition. In this study, we conducted a meta‐analysis to assess the effect of the recumbent position on nasal resistance and nasal airflow.

Review Methods

PubMed (Medline), Cochrane Library, EMBASE, Scopus, and SciELO databases were checked for relevant studies by two members of the YO‐IFOS study group. The two authors extracted the data. The main outcome was expressed as the difference between nasal resistance and nasal airflow before and after recumbency.

Results

Nine studies with a total population of 291 individuals were included in the meta‐analysis for nasal resistance after recumbency. We found a statistically significant difference in nasal airway resistance of −0.18 Pa sec/cm3 as compared to before and after recumbency through rhinomanometry (RMM) analysis. A subgroup analysis revealed a variation of −0.20 Pa sec/cm3 for patients with snoring or sleep apnea and − 0.10 Pa sec/cm3 for healthy individuals. Regarding nasal airflow measured with RMM, three studies (n = 32) in asymptomatic controls revealed a statistically significant difference of 47.33 ml/sec.

Conclusions

Recumbency increases nasal resistance and diminishes nasal airflow. This finding is of utmost importance in snorers and sleep apnea patients. Laryngoscope, 2021

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