How is OSA diagnosed?

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If you have symptoms that suggest OSA, or a high score on the Epworth Sleepiness Scale, your GP may refer you to a specialist for tests. There are various types of test that can be done whilst you sleep. The ones done may be determined by local policies and availability of equipment. For example:

Airflow may be measured whilst you sleep by using a probe placed under your nose.
Sensors may be used to record snoring volume and body movement whilst you sleep.
The oxygen level in your blood can be monitored by a probe clipped onto your finger.
Breathing can be monitored and recorded by the use of special belts placed around the chest and abdomen.
A video of you sleeping may be helpful.

You may be asked to spend a night in hospital for the tests to be done. However, some of the tests may be done in your own home from equipment supplied by the specialist. The information gained from the tests can help a specialist to firmly diagnose or rule out OSA.

OSA and driving

If you are diagnosed with OSA and you are a driver, you must not drive and you must inform the DVLA (Driver and Vehicle Licensing Agency). For normal car drivers, you will usually be allowed to resume driving after you no longer have daytime sleepiness with treatment. However, special rules apply if you have an HGV or similar license.

Equally, if you have daytime sleepiness, you should not operate heavy machinery as this can also be dangerous.