On this page:

Welcome to Gastrointestinal Physiology

This section of the website gives details of the procedures we perform and patient information leaflets to help you prepare for your upcoming investigations.

Procedures we perform:

  • Oesophageal Manometry
  • 24-hour pH/Impedance Monitoring
  • Wireless pH Monitoring (Bravo™)
  • Anorectal Manometry
  • Endoanal Ultrasound
  • Hydrogen/Methane Breath Testing
    • For Small Intestinal Bacterial Overgrowth (SIBO), Lactose intolerance, Fructose intolerance

Patient information leaflets


  • Dr Jamal Hayat – Consultant Gastroenterologist
  • Alice Henderson – Clinical Scientist
  • Priscilla Appiahene – Physicians Associate
  • Anna Wolak – Clinical Physiologist
  • Malgorzata Szling – Healthcare Assistant
  • Ivan Biroli – Secretary
  • Sachcadena Walker – Patient Pathway Coordinator

Useful sources of information

Pelvic Floor Health

Our Pelvic Health Physiotherapy department have created useful educational videos and information leaflets on how to perform pelvic floor exercises and maintain healthy bowels. Please visit their page below for more information:

Pelvic Health Physiotherapy – Resources – St George’s University Hospitals NHS Foundation Trust (stgeorges.nhs.uk)

Contact details

If you have any questions or concerns, please email us using giphysiologyqueries@stgeorges.nhs.uk, which is regularly checked. Alternatively, please contact our patient pathway coordinator, Sachcadena Walker on 020 8725 3569 (Wednesday to Friday, 8:30am – 4:30pm).