Sleep services

At Cromwell Hospital, we offer some of the most advanced sleep studies available to adults and children.

Tests include nocturnal polysomnography (PSG), which is widely regarded as the gold standard in sleep diagnostics. During this test, we look for a range of sleep disorders, including parasomnias and periodic limb disorders.

The results from these tests are interpreted by a team of clinical physiologists who work closely with our sleep consultants for the most accurate diagnosis. Results are usually ready within five days.

Our sleep clinic is led by a multidisciplinary team of experts, including respiratory and sleep physiologists, as well as neurology and ENT consultants.

They work together on complex cases, to ensure optimum medical care and the best outcomes for the patient.

Why choose us?

At Cromwell Hospital, you can expect:

  • cutting-edge diagnostic tests
  • multidisciplinary team of sleep experts
  • tests can be carried out in the hospital, or at home
  • results within five days


This is a simple portable sleep study that can be conducted in the hospital or at home and commonly used to diagnose sleep Apnoea. Your breathing, oxygen levels, chest and abdomen movement will be recorded overnight.

This study will involve you wearing a motion and light sensing Actiwatch around your wrist. The watch will record your activity continuously for at least 14 days to enable us to assess your 24 hour sleep-wake cycle.

This investigation is considered by many as the gold standard in sleep diagnostics. During a PSG you will be filmed as well as having your brain activity, breathing, oxygen levels, limb movement, muscle tone and eye movements monitored. We will use the information to look for sleep disorders such as sleep apnoea, snoring, periodic limb movement disorder, parasomnias (sleep walking/talking) and other uncommon sleep conditions. This test can be conducted in one of our specialist sleep study rooms or at home if appropriate.

If you already use continuous positive airwave pressue (CPAP) or non-invasive ventilation (NIV) device or if it’s very likely you require therapy, initial and annual PAP titration study is very important. We will monitor you overnight on your device and make sure that the device is supporting you correctly and configured to optimum settings. This is done the same way as a standard polysomnography.  

This study requires an overnight stay in the hospital to initially conduct a standard PSG and is followed by a daytime sleep study. You will be given up to five 20 minute nap opportunities throughout the day during which you will be filmed and have your brain activity, oxygen levels, muscle tone and eye movements monitored. We will then measure if you fall asleep in each nap and, if so, whether you go into rapid eye movement (REM) sleep or not.

This test records your oxygen and carbon dioxide levels throughout the night to see if they are in normal ranges. This can be used in conjunction with CPAP or NIV as a way of optimising therapy settings. 

"I would like to thank everyone at Cromwell Hospital for the fantastic way you looked after me. I could not fault anyone during the time I spent with you - from the point I arrived in reception, to the catering team and every member of staff throughout the changes of shift during my stay."

Anonymous, Cromwell Hospital patient

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