SDB is very common in the elderly, particularly men, and is characterised by repeated pauses - apnoeas or hypopnoeas
- in breathing during sleep.
Sleep, part 3: Clinical Presentation and Diagnosis of the Obstructive Sleep Apnoea Hypopnoea
Syndrome, Thorax 2004; 59: 347-52.
However, in patients with a BMI of greater than 28 and probable OSA, no difference in the number of respiratory events (obstructive apnoeas, hypopnoeas
or central apnoeas) was found between those given IV-PCA morphine compared with those given an 'opioid-sparing' analgesic regimen (IV-PCA tramadol, parecoxib and 'rescue-only' morphine), but there was a correlation between more than 15 respiratory events/hour and central apnoeas with total morphine dose (67).
The average number of episodes of apnoea and hypopnoea
per hour of sleep, the apnoea hypopnoea
index (AHI) was calculated.
Sleep - 1: Obstructive sleep apnoea/ hypopnoea
syndrome: definitions, epidemiology, and natural history.
The patients were divided into four equal groups: Group 1 - snoring without apnoea (age 20- 40); Group 2 - snoring without apnoea (age 40-60); Group 3 - apnoea-hypopnoea
index less than 5/hr; Group 4: apnoea- hypopnoea
index greater than 30/hr.
was defined as a discernible reduction in respiratory airflow during a preceding period of normal breathing for [greater than or equal to] 10 sec accompanied by a decrease of 4 per cent or more in oxyhaemoglobin saturation during sleep.
Time course of changes in driving simulator performance with and without treatment in patients with sleep apnoea hypopnoea
4) TAI (Total Arousal Index) with oxygen drop/AHI (Apnoea Hypopnoea
Index) and OA are high in Group 1 patients.
was defined as a reduction in amplitude of the primary airflow trace of at least 50% of the preceding amplitude and accompanied in <30 s by oxygen desaturation of 4% (12).
Heredia; Comparison between automatic and manual analysis in the diagnosis of obstructive sleep apnoea Hypopnoea
In this issue Chou and colleagues (7) report on a Taiwanese referral-based study demonstrating that unlike the apnoea hypopnoea
index; the oxygen desaturation index defined as the frequency of 4 per cent oxygen desaturation episodes per hour of sleep was significantly associated with hypercholesterolaemia (>200 mg/dl) and hypertriglyceridaemia (>150 mg/dl) even after taking into account confounding factors such as obesity as defined by body mass index.
Management of obstructive sleep apnoea/ hypopnoea
syndrome in adults.
was defined as 50% or greater reduction of airflow or equivalent associated with an arousal or desaturation of more than 3%.
The definition of hypopnoea
was a 50 per cent or greater reduction in airflow for a minimum of 10 seconds, associated with an equal to or greater more than a 4 per cent drop in Sp[O.