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Dr Alistair McNair

Consultant Gastroenterologist

MA, MB, BChir, PhD, FRCP

Practices at: BMI The Blackheath Hospital

A photo of Dr Alistair McNair

Dr McNair has been a Consultant Gastroenterologist for over 19 years based at The Queen Elizabeth Hospital in South East London. Dr McNair manages a broad range of medical conditions affecting the intestine and liver. Particular areas of interest include Crohns and colitis and liver disease. He has extensive experience in diagnostic and therapeutic endoscopy and has been lead investigator in several large research projects in this field which have been published in international medical journals.

Dr McNair is the lead for endoscopy services at the Queen Elizabeth Hospital (part of the Lewisham & Greenwich NHS Trust). He was Secretary of the endoscopy section of the British Society of Gastroenterology from 2009 to 2012. Dr McNair is the BSGE representative on the Royal College of Anaesthetists working party developing guidelines for ensuring safe sedation practice for healthcare procedures. He has also been Regional Gastroenterology Training Programme Director. In 2009 he was given a Bronze National Award for his research and work for national and regional organisations.


  • Powell N, Knight H, Dunn J, Saxena V,  Mawdsley J, Murray C, Hoare J, Teare J, McNair A. Images of the terminal ileum are more convincing than caecal images when verifying the extent of colonoscopy. Endoscopy 2011; 43: 196-201

  • Hayee B, Dunn J, Loganayagam A, Wong M, Saxena V, Rowbotham D, McNair A. 2009. Midazolam with Pethidine or Fentanyl for colonoscopy: Results of a randomised trial. Gastrointest Endosc 69:681-7

  • Powell N, McNair A. 2008  Gastrointestinal evaluation of anaemia patients without evidence of iron deficiency.  European J Gastro Hepatol. 2008. 20:1094-1100

  • Powell N, Hayee BH, Yeoh DPK, Rowbotham D, Saxena V, McNair A 2007  Terminal ileal photography or biopsy to verify total colonoscopy: does the endoscope agree with the microscope?  Gastrointest Endosc 66:320-325

Clinical Interests

  • As a gastroenterologist I manage a wide variety of disorders affecting the intestine and liver. I also do endoscopic examinations of the stomach (gastroscopy) and bowel (colonoscopy and flexible sigmoidoscopy).

  • My particular areas of interest include inflammatory bowel disease (Crohn’s disease and ulcerative colitis), celiac disease and irritable bowel syndrome.

  • I have undertaken a period of research in viral hepatitis and this remains one of my specialist fields. As well as diagnostic endoscopic procedures, I also do ‘therapeutic’ procedures including ERCPs to remove stones from bile ducts or insert stents to relieve blockages in the ducts and I carry out balloon dilatations of ‘strictures’ (areas of narrowing in the gullet or intestine).

Professional Membership

  • Royal College of Physicians

  • British Society of Gastroenterology

  • British Medical Association

  • American Society of Gastrointestinal Endoscopists

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