I have been working as a Consultant Surgeon with the Epsom & St Helier University Hospitals since April 1999. I graduated in Bombay India with Masters in General Surgery and completed my Higher Surgical Training in Wales UK with specialist registration in Upper GI surgery. I was a Fellow at University Hospital California, Los Angeles in 1997 where I spent a year training in the Foregut Unit with Prof Dr DeMeester and carried out further research culminating in MPhil degree awarded for my thesis on Bile Reflux in Barrett’s Oesophagus by the University College of Medicine Cardiff, Wales.
I visited the Gastric Cancer Unit at the National Cancer Hospital in Tokyo. In 2015 I took a year sabbatical to work in New Zealand
I am passionate about teaching medical students and training junior doctors. I was appointed Surgical Tutor for the London Deanery from 2005 and examiner for the fellowship exams at the Royal college of Surgeons of England. I regularly contribute to the postgraduate and GP lecture program in the hospitals. I have travelled widely and presented scientific papers. I also undertake training of doctors internationally in countries such as India, Malawi and Romania.
I am a member of the Association of Surgeons of GB & Ireland, Surgical Society of Alimentary Tract (SSAT) USA and Association of Laparoscopic Surgeons GBI
I am on the specialist register with the GMC ( Registration no 3637566 - http://www.gmc-uk.org/register/search/index.asp).
Publications
1) Nehra D, Bhatt MV.
Carcinoma of the oesophagus - Immediate morbidity and mortality.
MS Gen Surg University of Bombay,
October 1984.
2) Nehra D, Dewoolkar VV.
Squamous cell carcinoma of the caecum: A case report.
Indian J Gastroenterol 1987; 1: 56-8.
3) Nehra D, Purohit S, Anantharaman P.
Total parenteral nutrition in the management of enterocutaneous fistulae.
Indian Pract 1987; 11: 393-99.
4) Nehra D.
Fluid and electrolyte imbalance in surgical patients: A review.
Indian Pract 1987; 11: 929-35.
5) Nehra D, Anantharaman P.
Role of inguinal ligation of varicocele in primary male infertility and sub-fertility
Indian Pract 1989; 8: 609-11.
6) Nehra D, Beynon J, Pye JK.
Spontaneous rupture of the oesophagus (Boerhaave's syndrome).
Postgrad Med J 1993; 69: 214-6.
7) Nehra D, Valijahan M, Edwards AE, Crumplin MKH.
Evolving role of intensive and high-dependency care.
Ann R Coll Surg Engl 1994; 76: 9-13.
8) Nehra D, Gemmell L, Pye JK.
Pain relief after inguinal hernia repair: A randomised double blind study.
Br J Surg 1995; 82: 1245-7.
9) Carr ND, Nehra D
Splenic abscess (Letter)
Br J Surg 1996; 83: 134.
10) Nehra D, Watt P, Pye JK, Beynon J.
Automated oesophageal reflux sampler - A new device used to monitor bile acid reflux in patients with gastro-oesophageal reflux disease.
J Med Engineering and Technology 1997; 21: 1-9.
11) Nehra D.
Equality of efficacy for open and laparoscopic antireflux repair?
Am J Gastroenterol 1997; 92: 1235-6.
12) Gadenstatter M, Nehra D.
Achalasia: dilatation or myotomy? A continuing enigma.
Am J Gastroenterol 1997; 92: 1572-3
13) Nehra D, Howell P, Pye JK, Beynon J.
Assessment of combined bile acid and pH profiles in using a new automated oesophageal reflux sampler in gastro-oesophageal reflux disease.
Br J Surg 1998; 85 134-137.
14) Nehra D, Howell P, Williams CP, Pye JK, Beynon J.
Toxic bile acids in gastro-oesophageal reflux disease - Influence of gastric acidity.
Gut 1999; 44: 598-602.
15) Theisen J, Nehra D, Citron D, Johansson J, Hagen J, Crookes PF, DeMeester S, Bremner CG, DeMeester TR, Peters JH.
Suppression of gastric acid secretion in patients with gastroesophageal reflux disease results in bacterial overgrowth and deconjugation of bile acids.
J Gastrointest Surg 2000; 4: 50-4
16) Aldridge AJ, Nehra D
Letter : Mesh compared with non-mesh methods of open groin hernia repair: systematic review of randomized controlled trials and laparoscopic compared with open methods of groin hernia repair: systematic review of randomized controlled trials.
Br J Surg. 2001 Mar;88(3):471
17) Nehra D. Lord RV. DeMeester TR. Theisen J. Peters JH. Crookes PF. Bremner CG.
Physiologic basis for the treatment of epiphrenic diverticulum. Annals of Surgery.
2002 Mar 235(3):346-54,
18) D Nehra
Composition of the refluxate
Book chapter Barrett’s Esophagus Vol 1 OESO 2002 John Libbey Eurotext Limited
19) D Nehra
The circadian variations of intragastric acid, pepsin, and bile acids content in patients with reflux esophagitis: Book chapter Duodenogastric Reflux
OESO 2006
20) D Nehra
The relationship between the conjugation of bile acids and the pH of the refluxate Duodenogastric Reflux Book Chapter
OESO 2006
21) Nehra D.
Bile in the esophagus-model for a bile acid biosensor. J Gastrointest Surg.
2010 Feb;14 Suppl 1:S6-8. Epub 2009 Sep 23. PubMed PMID: 19774428.
22) Pantling AZ, Aldean H, Nehra D.
An alternative technique for mesh repair of incisional hernia.
Ann R Coll Surg Engl 2010; 92: 529-534
23) JLC Smelt, D Nehra
Laparoscopic Removal of a Double Gallbladder for Cholelithiasis
Annals of The Royal College of Surgeons of England, Volume 93, Number 6, September 2011 , pp. 105E-106E(2)
24) Jamal K1, Ratansingham K2, Siddique M3, Nehra D4.
Routine histological analysis of a macroscopically normal gallbladder--a review of the literature.
Int J Surg. 2014;12(9):958-62. doi: 10.1016/j.ijsu.2014.07.010. Epub 2014 Jul 22.
25) ND Rao, J Swaby, D Nehra
Can a hobby influence medical students’ suturing skills?
Volume: 97 Issue: 9, October 2015, pp. 387-391
DOI: http://dx.doi.org/10.1308/rcsbull.2015.387
26) M Williamson, , M Ghazaly, , N Bhatt, , and D Nehra
Looking after patients, not looking for patients
Volume: 97 Issue: 6, June 2015, pp. 260-262 DOI: http://dx.doi.org/10.1308/147363515X14272809070960
Personal Presentations With Published Abstracts
1) Nehra D, Beynon J, Crumplin MKH.
Necrotising fasciitis - Experience in two centres: Bombay (India) and Wrexham (UK).
Welsh Surgical Society Autumn Meeting
Abstract Vol. XVIII 1991
2) Nehra D, Beynon J, Pye JK, Watt P, Howell P.
Automated oesophageal reflux sampler - a new method to sample the distal oesophagus.
Surgical Research Society 81st meeting -Jan 1995
Abstract Br J Surg 1995; 82: 701-2.
3) Nehra D, Pye JK, Beynon J.
Spectrum of bile acid reflux in gastro-oesophageal reflux disease using a new device to sample the distal oesophagus.
British Society of Gastroenterology - Spring meeting April 1995
Abstract Gut 1995; 36: suppl 1 A 29.
4) Nehra D, Beynon J, Pye JK, Howell P, Crumplin MKH.
Bile acid profiles in patients with reflux oesophagitis - A new device to sample the distal oesophagus.
Welsh Surgical Society Spring meeting - May 1995
Abstract Volume XXV 1995.
5) Nehra D, Beynon J, Howell P, Pye JK.
Toxic bile acids in reflux oesophagitis - Lithocholates enhance mucosal injury.
Surgical Research Society, Patey Prize Session - July 1995.
Abstract Br J Surg 1995; 82: 1544.
6) Nehra D, Howell P, Beynon J, Pye JK, Crumplin MKHC.
Toxic bile acids in reflux oesophagitis.
4th United European Gastroenterology Meeting - Berlin, September 1995.
Abstract Gut 1995; 37: suppl 2 A 162.
7) Nehra D, Lai LM, Morgan R, Beynon J, Carr ND.
Restorative proctocolectomy: A 6 year review.
Welsh Surgical Society meeting - November 1995.
Abstract Volume XXVI 1995
8) Nehra D, Howell P, Pye JK, Beynon J.
Bile acid toxicity in reflux oesophagitis.
XXX1st Congress of the European Society for Surgical Research - Southampton April 1996.
Abstract European Surg Research 1996; 28: suppl 1 172.
9) Nehra D, Howell P, Pye JK, Beynon J.
Toxic bile acids in reflux oesophagitis.
AGA Digestive Disease Week - San Francisco USA, May 1996
Abstract Gastroenterol 1996; 110: A209
10) Nehra D, Pye JK, Beynon J.
The relationship between bile acid reflux and oesophageal pH
The Association of Surgeons of GB and I - Glasgow, May 1996
Abstract Br J Surg 1996; 83: suppl 1, 13.
11) Nehra D, Gadenstatter M, Peters JH, Bremner CG, DeMeester TR
The physiologic basis for the treatment of epiphrenic diverticulum
AGA Digestive Disease Week - Washington DC USA, May 1997
Abstract Gastroenterol 1997; Suppl 112/4
12) Gadenstatter M, Nehra D, Collard JM, Ritter MP, Hagen JA, Peters JH, DeMeester TR
Reoperative antireflux surgery: procedure selection and outcome
AGA Digestive Disease Week - Washington DC USA, May 1997
Reoperative antireflux surgery: Procedure selection and outcome.
Abstract Gastroenterol 1997; Suppl 112/4:1444.
13) Gadenstatter M, Nehra D, Mason RJ, Bremner CG, Oberg S, Peters JH, DeMeester TR
Esophageal body motility in duodenogastroesophageal reflux (DGER) disease
American College of Surgeons - Chicago USA, Nov 1997.
Abstract Am J Gastroenterol 1997; 92:1591
14) Nehra D, Evans A, Srivastava ED, Allison MC, Lewis WG
Modified D2 Gastrectomy - Is it justified in patients with advanced stage III gastric cancer.
AGA Digestive Disease Week - New Orleans May 1998.
Abstract Gastroenterol 1998 Suppl 114/4:A653
15) Edwards P, Nehra D, Vellacot K, Griffith G, Lewis W.
Modified D2 Gastrectomy for gastric cancer - Experience with the Leeds technique in Wales.
Welsh Surgical Society meeting - May 1998.
16) Theisen J, Peters JH, Hughes M, Baril N, Skinner K, Bremner CG, Campos GMR, Gastel OL, Hashemi M, Nehra D, DeMeester TR, Laird PW
Bile salt induced mutation in vitro.AGA - New Orleans May 1998.
Abstract Gastroenterol 1998 Suppl 114/4:A1430.
17) Edwards P, Nehra D, Evans A, Allison M, Lewis WG.
Gastric cancer - What impact open access endoscopy
AUGIS Bristol Sept 1998
18) Nehra D, Edwards P, Vellacott K, Griffith G, Lewis W.
Modified D2 Gastrectomy for gastric cancer
AUGIS Bristol Sept 1998
19) Theisen J, Nehra D, Citron D, CG Bremner, Peters JH, DeMeester TRD.
Suppression of gastric acid secretion in patients with GERD results in bacterial overgrowth and deconjugation of bile salts.
AGA/SSAT Digestive Disease Week. Orlando May 1999
20) Outcome of mini-incision prolene hernia system repair of inguinal hernia.
Presented at the 2nd Annual Conference of British Hernia Society, Edinburgh Nov 2005
21) Outcome of survival following surgery for oesophago-gastric cancer does not depend on pre-operative chemotherapy alone.
DDW May 2006
22) C. T. P. Choh, R. S. Barai, D. NehraRationalisation of waiting times for laparoscopic cholecystectomy
BJS 2007; 94(S5): 1–65
23) A. E. Frampton, N. Kessaris, D. Nehra
An audit on antibiotic prescribing in acute general surgical patients
BJS2008; 95(S3): 1–84 (Awarded Poster of distinction)
24) A. E. Frampton, N. Kessaris, D. Nehra
Outcomes of emergency Hartmann’s procedures: a surgical audit
BJS 2009; (Awarded Poster of distinction)
25) J Cubitt, N Maftei, D Nehra
Open Repair of Giant Hiatus Hernia
World Journal of Surgery Volume 33, Supplement 1, 2009, S154-5 Abstract ID: 0400
Poster presentation at the 43rd World Congress of the International Society of Surgery, International Surgical Week Adelaide, Australia, 6-10 September 2009.
26) J Cubitt, D Nehra
The Management of Small Bowel Obstruction in a busy District General Hospital
World Journal of Surgery Volume 33, Supplement 1, 2009, S158 Abstract ID: 0410
Poster presentation at the 43rd World Congress of the International Society of Surgery, International Surgical Week Adelaide, Australia, 6-10 September 2009.
27) N Maftei, K.D Devalia, D Nehra
Managament of Open Abdominal Wounds with Vacuum Assisted Closure Therapy
World Journal of Surgery Volume 33, Supplement 1, 2009, S14 Abstract ID: 0036
Podium presentation at the 43rd World Congress of the International Society of Surgery, International Surgical Week Adelaide, Australia, 7th September 2009.
28) N Maftei, K Devalia, D Nehra
Cross Sectional Appraisal of Barrett's Oesophagus Surveillance at a Large Centre in the UK
World Journal of Surgery Volume 33, Supplement 1, 2009, S111 Abstract ID: 0286
Podium presentation at the 43rd World Congress of the International Society of Surgery, International Surgical Week Adelaide, Australia, 9th September 2009.
29) J. L. C. Smelt*, J. Sagar, A. Z. Pantling, D. Nehra
A modified on-lay mesh repair technique for incisional hernia
ASGBI May 2011
30) A. Catto*, K. Ratnasingham, B. Darwish, M. Lapsley, D. Nehra
Selective histological examination of appendix specimens is safe
E-Posters of Distinction III 0451 ASGBI May 2012
31) A. Seyan*, T. Nicoli, D. Raje, R. Fanous, D. Nehra
Weekly Fluctuations in Ultrasound Scan Delays
ASGBI May 2012
32) M. Kaya*, A. Anjum, K. Ratnasingham, D. Nehra
Alvarado score has a higher predictability of acute appendicitis compared to ultrasound scans
ASGBI May 2012
33) Clark j, Ratnasingham k, Nehra
A novel technique using mini-lap instruments to do appendicectomies.
D ASGBI May 2013
34) Clark j, Ratnasingham k, Nehra
Mechanical stress of tissue within stapler as a cause for anastomotic stricture
D ASGBI May 2013
35) Sarandeep K Kalsi, Hannah Colley, Emma McGlone, Dhiren Nehra
Emergency general surgical admissions in the very elderly: to operate or not
ASGBI May 2013
36) Andrew Pillai, D Nehra
Prophylactic Antibiotics in hernia surgery * poster of distinction
ASGBI May 2013
37) Karim Jamal Shalin shaunak Karthigan, Kiran Sran Dhiren Nehra
A novel technique for onlay incisional hernia repair with mesh incorporation in to the fascial defect- a method for addressing the risks of collagen failure and suture line tension
*poster of distinction
ASGBI May 2013
38) H Graham1,4, A Vasireddy2,4, A Rhodes1,4, D Nehra
A national audit of antibiotic prophylaxis in elective laparoscopic cholecystectomy
3 ALS Nov 2012
39) K Jamal, K Ratnasingham, D Nehra
Routine histological analysis of a macroscopically normal gallbladder- a systematic review of the literature.
ASGBI May 2014
40) Y Tabbakh, L Ravaratharajan, K Ratnasingham, S Jankowski, D Nehra
A thirteen year prospective study showing a reduction of mortality in emergency laparotomy with the introduction of post-operative admission to critical care.
ASGBI May 2014
41) H Smith, M Uhercik, I Swift
Pre-operative ultrasound marking of the inferior epigastric arteries prior to laparoscopic surgery.
(CUH) ASGBI May 2014
42) R O’Connell, K Jamal, K Ravindran, D Nehra
30 day readmission rates after emergency and elective general surgery.
ASGBI May 2014
43) K Ratnasingham, K Jamal, M Siddiqui
A diagnostic test meta-analysis of laparoscopic ultrasound and on table cholangiogram in the detection of common bile duct stones.
Distinction Poster presentations ASGBI May 2014
44) K Jamal, H Smith, A Shaw, Y Tabbakh, K Ratnasingham
Is routine luminal investigation required following a CT diagnosis of acute diverticulitis?
ASGBI May 2014
45) K Jamal, H Smith, A Shaw, K Ratnasingham, D Nehra
Specialist radiology reporting reduces unnecessary endoscopic examination in CT proven diverticulitis.
ASGBI May 2014
46) L Ravaratharajan, Y Tabbakh, K Jamal, S Jankowski, D Nehra
A ten year study assessing the outcomes of emergency laparotomies in >90 year olds.
ASGBI May 2014
47) Lavanya Vartharajan, Kumaran Ratnasingham, D Nehra.
LINX – Magnetic Lower Oesophageal Sphincter Augmentation Device. – Experience of a new antireflux procedure in a UK NHS Hospital.
RACS ASC 2015. asc.surgeons.org/wpcontent/uploads/2015/04/asc2015_final_program.pdf