A sleep study, medically known as a polysomnography, is a non-invasive, overnight test that monitors physiological functions while you sleep to diagnose sleep disorders. These tests record brain waves, heart rate, breathing, oxygen levels, and muscle activity to create a detailed picture of your sleep architecture. Proper preparation ensures the data collected is accurate and representative of your typical sleep patterns. Knowing what to bring and what to do beforehand can reduce anxiety and make your overnight stay more comfortable, leading to more reliable results.
Essential Paperwork and Medical Necessities
The administrative side of a sleep study requires specific documents for admission and billing. You should carry your photo identification, such as a driver’s license, along with your current medical insurance card. Many facilities also require a physician referral form or a pre-authorization number from your insurance provider. Confirming these are in order before arrival is important.
You must also bring a complete list of your current medications, detailing the dosage and the time you typically take them. Since the sleep technologist cannot dispense medications, bring enough prescription or over-the-counter drugs for the evening and the following morning. If you use a continuous positive airway pressure (CPAP) machine, bring the mask and tubing.
Comfort Items for the Overnight Stay
Bringing items that mimic your home routine helps minimize the “first night effect,” which is the tendency to sleep poorly in an unfamiliar place. Loose-fitting, two-piece pajamas are the preferred sleepwear. This style allows the sleep technologist easier access to place electrodes on your chest and abdomen without restriction. Avoid tight clothing or nightgowns that may interfere with sensor placement.
Bring a change of clothes for the morning and a full set of personal toiletries, including a toothbrush, toothpaste, and cases for contact lenses or eyeglasses. Bringing your own pillow or a familiar blanket can provide comfort and aid in falling asleep. A book or quiet entertainment can also help you relax while waiting for the sensors to be applied.
Logistical Preparations Before Arrival
Actions taken in the 24 hours before your appointment are important for the technical success of the polysomnography. You must shower and wash your hair thoroughly on the day of the study using only shampoo. Refrain from applying any hair products, such as conditioners, oils, gels, or sprays, because these substances interfere with the adhesive used to secure the electrodes to your scalp.
Avoid applying lotions, creams, perfumes, or makeup to your skin, as residue can prevent body sensors from adhering properly. If you wear nail polish or artificial nails, remove them from at least one index finger. This is necessary because an oximeter clip will be placed there to measure blood oxygen saturation.
Dietary and behavioral restrictions are also part of the preparation. Avoid consuming caffeine and alcohol for at least 12 hours before your scheduled arrival time, as these substances alter sleep architecture and could skew the diagnostic results. Do not take a nap on the day of the study; staying awake ensures you are adequately tired for the monitoring. Confirm the exact arrival time and the facility’s address to ensure a smooth start.