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المستخلص
Apnoea is cessation of airflow exceeding 10s duration to be considered significant. No standard definition of hypopnoea exists.
It is usually defined as a reduction in airflow or respiratory effort for more
than 10s accompanied by a desaturation of 3% or more and or
electroencephalographic evidence of arousal.
The apnoeas may be obstructive, central or mixed. Obstructive apnoeas are characterized by persistent effort without airflow while with central apnoea,effort is absent.
For patients with diagnosed apnoea, the preoperative assessment should include determination of the severity of the sleep apnoea mode of treatment, complications of treatment and complications of the apnoea itself.
Patients with diagnosed apnoea who are being treated with CPAP should
take their equipment to the operating theatre for use postoperatively.
choice of anaesthetic technique is important. Regional techniques should
be considered when possible,if general anaesthesia is necessary then
preparation for apossible difficult intubation should be made.