Apnea load (total duration of apnoea events) and hypopnoea load (total duration of hypopnoea events) correlate better with the Epworth Sleepiness Scale (ESS), compared to the traditional Apnoea-Hypopnoea Index (AHI). (https://pubmed.ncbi.nlm.nih.gov/30019066/) Study Summary: “Apnoeic and Hypopnoeic Load in Obstructive Sleep Apnoea: Correlation with Epworth Sleepiness Scale” (https://pubmed.ncbi.nlm.nih.gov/30019066/) Objective: […]
The apnea–hypopnea index (AHI) is commonly used to diagnose obstructive sleep apnea (OSA), but it doesn’t fully capture physiological variations that may contribute to health risks. Respiratory event duration, which reflects arousal threshold, may be a more precise predictor of mortality. The studies have categorized […]
The pulse-rate response to apneas and hypopneas, defined as the difference between the maximum pulse rate following an airway-opening event and the minimum pulse rate during the respiratory event. Click on the following link to read about methodology for calculating change in heart rate response […]
Metrics and Measurements: https://doi.org/10.1093/eurheartj/ehab151 Findings in Cohorts: https://doi.org/10.1093/eurheartj/ehab151 Arousal Burden Quartile Ranges (https://doi.org/10.1093/eurheartj/ehab151) Research studies have used the following quartile ranges for AB- Men: Women: These quartile ranges were used to stratify participants in the study and evaluate the association of arousal burden with cardiovascular […]
LFCT measures the time for oxygen to travel from the lungs to the fingertip, as assessed via sleep studies. It is determined by the time interval between the end of a respiratory event and the nadir of oxygen saturation (SpOâ‚‚). The following quartile ranges for […]
The duration (length of time) and depth (severity) of oxygen desaturations during respiratory events play a key role in determining the physiological impact of obstructive sleep apnea (OSA). These factors are closely linked to adverse health outcomes, such as cardiovascular complications and disease progression. It […]
Obstructive sleep apnea (OSA) is a chronic condition affecting nearly one billion people globally. It is characterized by repeated partial or complete upper airway collapses during sleep, leading to sleep disturbances, intermittent hypoxemia, and significant reductions in quality of life. The apnea-hypopnea index (AHI) and […]
There are four key endotypic traits influencing OSA: There are three primary approaches for quantifying endotypic traits associated with obstructive sleep apnea (OSA). These methods vary in complexity and applicability for clinical or research settings: 1. Direct Measures from Standard Polysomnography (PSG): 2. Physiological Laboratory […]
It’s clear now that OSA is caused not only by anatomical obstruction in upper airway but following other physiological factors also play a role in the pathophysiology of OSA- Most of the data regarding these physiological endotypes have been published in western populations. We also […]
We give same advice on Sleep hygiene to everyone without understanding individual differences. One such advice of good sleep hygiene was not to use devices before sleep and to keep TV out of the bedroom. The main idea behind this advice was that blue light […]