Por qué es un doctor de primer nivel/Professional statement/Perché è un dottore di prim’ordine
Dr John Martin graduated from Cambridge University and King’s College Hospital, London in 1990 and completed his gastroenterology training within North West London. He is a highly-experienced gastroenterologist and endoscopist based in London and holds an NHS Consultant post at Imperial College (ICL). He is an expert in colorectal cancer screening, therapeutic and diagnostic colonoscopy and has 25 years experience of managing all aspects of gastroenterology including abdominal pain or discomfort, reflux disease, diarrhoea and constipation, rectal bleeding, Irritable Bowel Syndrome, Crohn’s Disease and Ulcerative Colitis.
Dr Martin teaches colonoscopy both within the NHS Trust and also at national screening centres. He is a bowel cancer screening accredited colonoscopist and an examiner for BCSP colonoscopy accreditation.
Dr Martin is Director of the West London Bowel Cancer Screening Centre, he is the national advisor to Public Health England on endoscopy within the Bowel Cancer screening service and chairs the national advisory committee on quality and safety of endoscopy within screening. He forms an integral part of numerous other professional bodies and has been widely published in peer-reviewed journals.
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Abdominal pain
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Acid reflux
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Barrett's oesophagus
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Bloated stomach
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Blood in stool (rectal bleeding)
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Bowel cancer
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Bowel cancer screening
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Capsule endoscopy
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Chronic diarrhoea
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Coeliac disease
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Colic
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Colitis
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Colon cancer
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Colonoscopy
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Colorectal cancer
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Constipation
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Crohn's disease
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Diarrhoea
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Digestive diseases
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Diverticular disease
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Dysmotility
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Dysphagia
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Eating disorders
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Endoscopic mucosal resection (EMR)
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Endoscopic ultrasound (EUS)
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Endoscopy
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Epigastric hernia
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Food allergies
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Food intolerance
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Food intolerance test
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Gastric balloon
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Gastric band
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Gastric bypass
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Gastrointestinal bleeding
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Gastrointestinal endoscopy
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Gastroscopy
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Halitosis
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Helicobacter pylori
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Hepatic encephalopathy
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Hiatal hernia
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Incisional hernia
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Indigestion (dyspepsia)
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Inflammatory bowel disease (IBD)
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Iron deficiency
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Irritable bowel syndrome (IBS)
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Lactose intolerance
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Lactose intolerance test
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Liver cancer
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Malnutrition
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Morbid obesity
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Nutrition
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Obesity
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Oesophagitis
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Pancreatic cancer
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pH monitoring
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Piles (haemorrhoids)
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Polypectomy
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Polyps
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POSE procedure
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Rectal cancer
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Rectosigmoidoscopy
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Second medical opinion
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Stomach cancer
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Stomach reduction
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Stomach ulcer
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Ulcerative colitis
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Weight loss
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Bupa Cromwell Hospital8 Pennant Mews W8 5JN - London (Central London)(+44) 02078989995
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OneWelbeck Digestive Surgery1 Welbeck St W1G 0AR - London (Central London)(+44) 02078989995
Colorectal cancer screening and COVID: getting tested during the pandemic
Dr John Martin, an expert in colorectal cancer screening, explains how the coronavirus has affected your ability to receive a colorectal cancer screening test and clarifies how the tests are being resumed.
Understanding irritable bowel syndrome (IBS)
Have you been experiencing abdominal pain with diarrhoea, constipation, or both? These are the main symptoms of irritable bowel syndrome, a condition which can be managed with specialist help. Learn from Dr John Martin, a leading consultant gastroenterologist and expert in treating IBS, about what IBS is, its symptoms, how it's diagnosed and how it's treated.
Treatment for colorectal cancer and how to avoid it!
Colon cancer is one of the more avoidable cancers. Dr John Martin explains what happens if you're diagnosed with colon cancer, but also highlights how the need for treatment can be eliminated through screening.
Is bloating ever a sign of something serious?
Bloating is a common sensation that many of us have experienced. While it's very rare that it's a sign of something serious, it's valuable to know when to see a specialist for advice. Dr John Martin, a gastroenterologist, explains the causes of bloating so that you know when to seek medical help.
Dysmotility: a focus on the oesophagus
Oesophageal dysmotility is a condition in which the muscles in the oesophageal wall fail to contract as they should. This may result in discomfort and/or difficulty in swallowing. Dr John Martin is an expert in treating dysmotility of the intestine, and here he explains in detail about causes and treatment of dysmotility in the oesophagus.
Intestinal dysmotility: causes and treatments explained
Intestinal dysmotility is a common condition that causes a wide range of different symptoms with variable severity. Dr John Martin, a gastroenterologist with expertise in all aspects of gastroenterology, explains what this condition is and the treatment options you may be offered.
What to expect after a colonoscopy?
Have you been told that you need a colonoscopy? A colonoscopy allows your doctor to take a look at your colon and rectum to find cancer or polyps. It is a safe examination with very few risks. Dr John Martin tells us a bit more about what to expect after a colonoscopy and what recovery looks like.
The pros and cons of a virtual colonoscopy
Colonoscopies after the age of 50 become a regular procedure to check inside the colon for abnormalities. Nowadays, a virtual colonoscopy is available to patients and offers a non-invasive and less aggressive alternative to a regular colonoscopy. But what happens during the procedure and can it offer more reliable results? Dr John Martin, a leading gastroenterologist in London, explains what a virtual colonoscopy is and why it might be right for you.
Colon polyps and the polypectomy procedure
Polyps are abnormal growths within the colon that vary in size from a few millimetres to several centimetres. Most of these are not cancerous, but some have the potential to develop into a cancer. Because of this risk, your doctor will very likely recommend that these are removed via a polypectomy. Here gastroenterologist Dr John Martin talks you through all you need to know about polyps and having a polypectomy.
Capsule endoscopy: how long does it take to pass?
Capsule endoscopy is a technique that allows visualisation of the entire gastrointestinal tract to enable doctors to diagnose conditions such as coeliac disease and inflammation of the gut. Expert gastroenterologist Dr John Martin explains how the procedure works and how long the capsule takes to pass.
How to relieve symptoms of IBS
The cause of irritable bowel syndrome (IBS) is not entirely understood. In IBS, the gut appears normal, with no inflammation or any abnormal findings on investigation. IBS is sometimes called a “functional” disorder because symptoms are thought to be caused by the way in which the gut works, for example, the passage of food through the gut may be either too slow or too quick.
In addition, the gut may be oversensitive to distension by either gas or food content, causing pain or discomfort. The symptoms of IBS may be exacerbated by certain foods or stress. Here to tell us more about IBS and how we can manage it is Dr John Martin.
What should I know about a colorectal cancer screening?
Colorectal cancer is the second commonest of cancer deaths in the UK, affecting 1 in 18 men and 1 in 20 women. However, the disease is entirely preventable by the early removal of non-cancerous growths (polyps), which are detected through screening tests. Expert gastroenterologist Dr John Martin explains more...
Diagnosing colon cancer
One of London's leading gastroenterologists Dr John Paul Martin tells us all we need to know about colon cancer.