National Lockdown update:  Our Hospital is still fully open for appointments and admissions, however visitors are not permitted. To keep you safe we have strict measures in place, read more about these here. To make an outpatient appointment, please call: 0207 806 4060.

Do NOT visit the Hospital if you have any COVID-19 symptoms. Please visit the Track and Trace website.


Sleep Studies

Our experienced clinical physiologists at the sleep unit are dedicated to solving patients sleep problems.

Sleep Unit

sleep studies1

What are Sleep Disorders?

Sleep disorders blight the lives of many people and their partners. Heavy snoring for example, can cause relationships to break down, while daytime sleepiness can affect your ability to study or work (and may also be a major contributor to other health problems such as high blood pressure and heart disease).

If you think you may suffer from a sleep disorder, a sleep study carried out by the Sleep Unit at the Hospital of St John & St Elizabeth can determine the best treatment plan.

What Is Sleep Apnoea?

In some cases daytime sleepiness is caused by not getting enough sleep, but it may also be due to an intrinsic sleep disorder known as Obstructive Sleep Apnoea (OSA). This is where breathing is interrupted by a reduction in airflow despite respiratory effort; this is due to relaxation in the muscle tone at the back of the throat and upper airway. This disrupts sleep and causes tiredness during the day which can also cause weight gain.

What Can Be Done About It?

Recent advances in the identification and treatment of sleep apnoea have improved the quality of life for millions of people. Sometimes a simple change in lifestyle can help (losing weight, for example). In many cases treatment with Continuous Positive Airways Pressure (CPAP) is the most widely advocated and effective treatment for OSA. It is a machine that supports the airways throughout the night, significantly reduces snoring and sleep disruption caused by OSA.  Doctors work out what is most appropriate for each person from the results of a sleep study.

The Sleep Study

Sleep studies aim to diagnose Sleep Disordered Breathing (SDB), and may be used to exclude OSA. They are used to assess breathing throughout the night via a range of measurements including airflow, snoring levels, oxygen levels, heart rate, muscle effort and body position. This can all be fitted in the clinic, then worn overnight at home in the comfort of your own bed

What Happens Next?

Based on the results of the sleep study, the Consultant in sleep medicine will recommend that you are either:

  • Referred for dietary advice, or
  • Referred for CPAP trial

A report will be sent to your GP with an explanation of the appropriate treatment options. Alternatively, a follow-up appointment with the Consultant can be arranged.

Who Provides The Service?

The Sleep Unit is run by a team of Clinical Physiologists, who have been specifically trained to carry out sleep studies, analyse results, fit and adjust CPAP masks and pressures. They are supported by a Consultant in Sleep and Thoracic Medicine who reports the studies.

Who Should Seek Help?

  • People whose snoring is so bad that it is affecting their relationship with their partner.
  • People who snore and wake up feeling more tired than when they went to bed.
  • People who suffer from daytime sleepiness.

Sometimes people with an existing condition such as hypertension or heart disease are referred for sleep study if their GP suspects that sleep apnoea might be making their condition worse.

Paying For Your Sleep Study

Your own GP or specialist may request a sleep study on your behalf. Alternatively, you may choose to have an initial consultation with a specialist.

If appropriate, you will be referred for a sleep study.

Please note that some insurance companies may not cover the cost of this treatment.

Contact Information

Patients with a Request Form or letter of referral wishing to make an appointment should call us on: Tel – 020 7806 4080; Fax – 020 7806 4081 or email us at:

Opening hours

  • Monday to Thursday: 9.00am – 7.00pm
  • Friday: 9.00am – 6.00pm

Our Sleep Consultants

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