Sleep and ventilation - Harefield Hospital

Harefield Hospital provides a multidisciplinary consultant-led sleep service that provides assessment and management for patients with sleep disorders, typically obstructive sleep apnoea. We primarily offer home multi-channel sleep studies as we recognise that most people prefer sleeping in their own bed rather than in hospital.

The sleep clinic at Harefield Hospital is supported by specialist sleep technicians from the department of respiratory physiology, who provide comprehensive technical support and clinical nurse/physiotherapy specialists.

Meet the team
How to get referred

What you need to do before your clinic appointment
What you need to bring to your appointment
What happens on the day of the clinic
What happens if you are prescribed CPAP
How to find us
Useful videos

Meet the team

The Harefield Hospital sleep clinic is run by a leading team of specialists in chest and respiratory conditions:

  • Dr Amanda Sathyapala (previously Natanek), consultant respiratory physician 
  • Dr William Man, consultant chest physician
  • Dr David Evans, consultant respiratory physician
  • Dr Samantha Kon, consultant chest physician 
  • Dr Shirmila Withana, consultant-grade associate specialist 
  • Dr Dawar Rizavi, speciality doctor
  • Ms Sharyl James, clinical nurse specialist 

Our team cares for patients with problems related to:

  • sleep apnoea
  • troublesome snoring
  • narcolepsy
  • restless leg syndrome
  • REM sleep behaviour disorder
  • idiopathic hypersomnia
  • parasomnias
  • circadian disorders
  • insomnia

The sleep clinic runs on the following days:

  • Monday (am and pm) - Dr William Man
  • Tuesday (am and pm) - Dr David Evans
  • Thursday (pm) - Dr Amanda Sathyapala and Dr Shirmila Withana
  • Friday (am and pm) - Dr Samantha Kon

How to get referred

 We accept referrals from:

  • GPs
  • consultants
  • other healthcare professionals, including respiratory physiotherapists and nurse specialists.

GP referrals must be made through the e-referral service. Letters from other referrers should be addressed to the Department of Respiratory Medicine, Harefield Hospital, Hill End Road, Harefield, Middlesex, UB9 6HJ.

Please note: Referrals for professional drivers (HGV licence) with suspected obstructive sleep apnoea should be marked URGENT to ensure a fast-track sleep study service.

What you need to do before your clinic appointment

Prior to your clinic appointment, you will be asked to do a sleep study at home using the Embletta sleep monitoring device, which we will ask you to collect from the respiratory physiology department at Harefield Hospital. Watch a video on how to wear and use the Embletta device. 

What you need to bring to your appointment 

Please bring with you a list of your current medications and, if you can, a list of any medical conditions and/or procedures you have had in the past. 

What happens on the day of the clinic

On the day of your appointment you may be asked to have a chest X-ray (this is routine), and also fill in a questionnaire while you wait to be seen. You will then be seen by one of our respiratory consultants or a nurse specialist, who will review the results of your Embletta sleep study and discuss a plan of treatment, alongside any follow-up appointments you may need to attend.

What happens if you are prescribed CPAP 

If you have been prescribed treatment with CPAP (continuous positive airway pressure), we will ask you to collect your CPAP machine from the respiratory physiology department at Harefield Hospital. Watch a video on how to use a CPAP machine. 

How to find us

The sleep clinic and the respiratory physiology department that manages sleep studies and CPAP is located on 1st floor at Harefield Hospital, Hill End Road, Harefield, Middlesex, UB9 6HJ. 

Respiratory physiology


1st floor, Harefield Hospital 
Telephone: +44 (0)1895 823 737 ext. 85589

Useful videos 

Obstructive sleep apnoea and how to use a CPAP machine  

You can also view the full video above in bitesize sections via the following links: 

Introduction to obstructive sleep apnoea

Patient experiences of using a CPAP machine

How to set up a CPAP machine

How to fit a nasal mask

How to fit a face mask

How to fit nasal cushions

How to troubleshoot your CPAP machine / informing the DVLA 

How to use the Embletta sleep monitoring device 

Using a TOSCA device for monitoring oxygen and carbon dioxide levels during the night

How to use an actigraphy device for monitoring leg movements during the night