020 3312 1072

Sharon Alexander


Dr Ruban completed his medical degree at Imperial College London, before completing his specialist training in London. He has a Masters (MSc) in Medical Education at UCL and a PhD at Imperial College. He has experience of conducting an NIHR funded multicentre randomised controlled trial and won the prestigious Integrated Healthcare Scholarship in 2021 from the International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO).

He is on the British Society of Gastroenterology (BSG) small bowel and nutrition committee and has specialist interests in nutrition and inflammatory bowel disease.



Colon polyps, inflammatory bowel disease, nutrition, gastro-oesphageal reflux, irritable bowel syndrome, anaemia and GI blood loss

Research & publications

1. Ruban A, Glaysher MA, Miras AD, Goldstone AP, Prechtl CG et al. Duodenal-jejunal Bypass Liner for the management of Type 2 Diabetes and Obesity: A Multicenter Randomized
Controlled Trial. Annals of Surgery June 2021 doi:10.1097/SLA.0000004980

2. Temperley L, Sullivan A, Ruban A. Bariatric surgery and the endoscopist.
Frontline Gastroenterology 2020. doi: 10.1136/flgastro-2020-101681

3. Ruban A, Glaysher MA, Miras AD, Goldstone AP, Prechtl CG et al. A duodenal sleeve bypass device added to intensive medical therapy for obesity with type 2 diabetes: a RCT.
NIHR Journals Library; 2020 Nov. PMID: 33211455.

4. Glaysher A, Ward J, Aldhwayan, Ruban A et al. The effect of a duodenal-jejunal bypass liner on lipid profile and blood concentrations of long chain polyunsaturated fatty acids.
Clinical Nutrition 2020

5. Sullivan A, Temperley L, Ruban A. Pathophysiology, Aetiology and Treatment of Gastroparesis.
Digestive Diseases Sciences 2020 DOI:10.1007/s10620-020-06287-2

6. Tern P, Bryce K, Marelli L, Ruban A. Hepatic Encephalopathy: A rare cause of focal seizures in chronic liver disease.
BMJ Case Reports CP 2020;13:e233046

7. Ruban A, Prechtl CG, Glaysher MA, Chhina N, Al-Najim W, Miras AD, Smith C, Goldstone
AP, Patel M, Moore M, Ashrafian H, Byrne JP, Teare JP. Effectiveness of different recruitment strategies in an RCT of a surgical device: experience from the Endobarrier trial.
BMJ Open 2019 14;9(11):e032439. Doi: 10.1136/bmjopen-2019-032439

8. Ruban A, Doshi A, Lam E, Teare J. Medical Devices in Obesity Treatment.
Current Diabetes Reports 2019.

9. Radhakrishnan ST, Ruban A, Uthayakumar AK, Cohen P, Levy J, Teare J. Haemolytic
Uraemic Syndrome – a rare case report of bloody diarrhea in adults.
BMC Gastroenterology 2019.

10. Ruban A, Stoenchev K, Ashrafian H, Teare JP. Current Treatments for Obesity.
Clinical Medicine 2019. 19:205-212; doi:10.7861/clinmedicine.19-3-205

11. Ruban A, Ashrafian H, Teare JP. The Endobarrier: Duodenal Jejunal Bypass Liner for Diabetes & Weight Loss.
Gastroenterology Research and Practice 2018.

12. Ruban A, A Uthayakumar, Ashrafian H, Teare JP. Mentored Reviews: Endoscopic Interventions in the Treatment of Obesity & Diabetes.
Digestive Diseases and Sciences 2018.

13. Radhakrishnan ST, Mohanaruban A, Hoque Sami. Mesalazine-Induced Myocarditis: a case report.
Journal of Medical Case Reports 2018. Doi 10.1186/s13256-017-1557-z

14. Patel N, Mohanaruban A, Ashrafian H et al. Endobarrier: A safe and effective novel treatment for obesity and type 2 diabetes.
Obesity Surgery 2018.

15. Glaysher M, Mohanaruban A, Prechtl CG et al. A randomised controlled trial of a duodenaljejunal bypass sleeve device (EndoBarrier) compared with standard medical therapy for the management of obese subjects with type 2 diabetes mellitus.
BMJ Open 2017;7:e018598. Doi: 10.1136/bmjopen-2017-018598

16. Mohanaruban A, Flanders L, Rees H. Case Based Discussion: Perceptions of Feedback.
Clinical Teacher 2017 14:1-6

17. Mohanaruban A, Bryce K, Radhakrishnan A, et al Safe sedation practices among gastroenterology registrars: do we need more training?
Frontline Gastroenterology 2015. Doi: 10.1136/flgastro-2014-100551

18. Mohanaruban A, Flanders L, Dor R. Curriculum Based Reviews: Consent in the Endoscopy Department.
Frontline Gastroenterology 2014; 5:291-296 doi:10.1136/flgastro-2013-100394

19. Coulson S, Mohanaruban A, A Shlebak, A Sergot. An unusual cause of bleeding in an elderly patient.
Clinical Medicine 2012, Vol 12, No 2: 150-2


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