Bariatric & Metabolic Surgery

Meet the Team

Meet the Team

Dr Hewin

Consultant Bariatric Surgeon

Mr. Hewin is a General surgeon working mainly with Upper Gastrointestinal surgery cases. His specialist interests include bariatric surgery (weight loss surgery, including gastric band and gastric balloon), advanced laparoscopic (keyhole) surgery and cancer surgery.

Career Synopsis:

  • Qualified in Medicine in 1989 (Bristol)
  • Specialised in Upper GI Surgery in November 2001
  • Mr Hewin has set up an NHS morbid obesity surgery service in Gloucestershire which has been recognised by the South West Specialist Commissioners as a Centre of Excellence.
  • Lead Clinician for Bariatric Surgery at the Gloucestershire Hospitals NHS Foundation Trust since April 2003

Darwin Mayo

Msc Bsc Nursing, Senior Theatre Nurse

Darwin is our senior nurse involved in the gastric band adjustments. He is also our anaesthetic nurse, who specialises in anaesthesia and assists the anaesthetist in the bariatric operating theatre. He has vast experience in this field, including vascular recovery and is a support provider for advanced cardiac life support, patient controlled analgesia, immediate life support. He is also a key trainer in anaesthetic monitor suction ECG machines (Hammersmith Hospital UK).

From 2003 to 2013 Darwin worked as an anaesthetic and recovery nurse in the Mater Hospital, recovering vascular, orthopaedic/spinal, cardio-thoracic, urology, plastic and ophthalmic cases. He also has experience in assisting in anaesthesia for heart and lung transplants, and is highly trained in difficult airway management.

Mr David Keogh

B.Sc. Bariatric Unit Coordinator

David Keogh, our weight loss surgery co-ordinator, originally delved into the field of engineering. However, having discovered that this path wasn’t for him, he enrolled himself into a Bachelor of Science degree. Several years later David graduated with a degree in Sports Science and Health. Since then, David has attended the Royal College of Surgeons in London and completed courses in Bariatric Patient Management. He has also, completed courses under the International Olympic Council in Nutrition and Dietetics for Health and Fitness.

Whilst doing his degree David also gained several coaching qualifications including Olympic weight lifting, rugby, tenpin bowling and football.

Unhappy with his weight, David began following a diet and exercise program which he developed himself. Within one year David lost almost five stone in weight. During this time he developed an enormous interest in the topic of weight loss and weight management and decided to enter into the field of weight loss surgery in order to help others achieve what he had achieved himself.

In his spare time, David plays tenpin bowling and has represented Ireland on a number of occasions. He is also a keen marathon runner and takes great pride in helping others to achieve their desired goals.