![]() You may also have a blood test to find out whether you have a genetic marker known as HLA DQB * 0602, which is associated with narcolepsy.Ī positive result supports a diagnosis, but does not make it 100% certain – 30% of people without narcolepsy also have the genetic marker. If you have narcolepsy, you'll usually fall asleep easily and enter rapid eye movement (REM) sleep very quickly. You'll be asked to take several naps throughout the day, and a specialist will analyse how quickly and easily you fall asleep. You may have this test after polysomnography. Multiple sleep latency testĪ multiple sleep latency test measures how long it takes for you to fall asleep during the day. Sound recording and video equipment may also be used to record sound and images.Īfter you have slept, a specialist will analyse your test results to determine whether you have normal brain wave activity, breathing patterns, and muscle and eye movement. electrocardiography (ECG), which monitors your heart.pulse oximetry, which measures your heart rate and blood oxygen levels.recordings of airflow through your mouth and nose.recordings of movements in your chest and tummy (abdomen).electromyography (EMG), which monitors muscle tone.electrooculography, which monitors eye movements.electroencephalography (EEG), which monitors brain waves.Sensors will also be placed on your legs and an oxygen sensor will be attached to your finger.Ī number of different tests will be carried out during polysomnography, including: It usually involves staying overnight at the sleep centre so your sleeping patterns can be analysed.ĭuring the night, several different parts of your body will be monitored using electrodes and bands that are placed on your body while you sleep. Polysomnography is an investigation of your sleep carried out at a specialist sleep centre. If this is the case, your GP will probably refer you to a sleep specialist for further investigation. If you score 11 or above, you have an increased level of daytime sleepiness. ![]() When filling out the questionnaire, you'll be asked to rank the likelihood that you'll fall asleep in situations such as sitting and reading, watching television and travelling as a passenger in a car.Ī score of 10 or below means you have the same level of daytime sleepiness as the general population. Your GP will use the results to decide whether to refer you to a sleep specialist. The Epworth sleepiness scale (PDF, 64kb) is a questionnaire used to assess how likely it is you'll fall asleep while doing different activities. ![]() There are many different ways your sleep can be analysed. ![]() If your GP thinks you may have narcolepsy, they'll refer you to a specialist in sleep disorders, who will analyse your sleep patterns. Your GP may carry out several tests to help rule out other conditions that could be causing your symptoms.įor example, you may have a physical examination, blood pressure tests and blood tests.
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