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Asthma
 
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COPD
 
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Sleep apnea
 
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Causes of sleep apnea
 
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Effects of sleep apnea
 
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How is sleep apnea diagnosed?
 
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How is sleep apnea treated?
 
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Advice for sleep apnea patients
 
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Hypoxia and hypoxemia
 
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Hypoxic respiratory failure in newborns
 
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Pain
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Linde Gas Therapeutics
SE-181 81 Lidingo
Sweden		Phone +46 8 731 10 00
Fax +46 8 765 52 87
asklindegastherapeutics@linde-gas.com
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How is sleep apnea diagnosed?

The severity of obstructive sleep apnea syndrome can be evaluated by polysomnography (PSG). During a PSG test, several body functions are registered and evaluated, such as: electrical activity of the brain, eye movement, heart rate, respiratory rate and effort, air flow and oxygen level in the blood.

An Apnea/Hypopnea Index (AHI) is then calculated per hour of sleep indicating how often breathing stopped during the night. These records allow a trained physician to diagnose - or rule out - sleep apnea among other sleep related disorders. Beyond a certain predefined limit of events (generally > 30), treatment should be prescribed to prevent these episodes of apnea or hypopnea.
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