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Byron Theron – Gastroenterologist

Private Service, Gastroenterology, Hepatology

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Description

Byron is a Gastroenterologist with a particular interest in endoscopy (gastroscopy and colonoscopy) for the early detection of cancer in the oesophagus, stomach and colon. 

Byron has a profound understanding of the complexities of the digestive system and a passion for patient care. He is deeply committed to patient education and empowerment, taking the time to explain diagnosis, treatment options, and preventative measures.

At the heart of Byron's expertise lies his specialised training in Gastroenterology and Internal Medicine which he developed during his postgraduate training in the UK. This included a period of research exploring the factors which predispose to oesophageal cancer such as Barrett's oesophagus. Furthermore, he has done research, presented at international conferences and published in peer reviewed journals on different aspects of gastroenterology including disorders of gut-brain interaction (e.g. irritable bowel syndrome), gastro-oesophageal reflux disease and Inflammatory Bowel Disease (Crohn's and Ulcerative Colitis).

Staff

Practice Manager: Donna Clark

Consultants

Ages

Adult / Pakeke, Older adult / Kaumātua

How do I access this service?

Referral

Contact us

Patient self-referral is welcome

Referral Expectations

Your GP will refer you to us if they are concerned that you have problems that require a specialist opinion regarding the diagnosis or treatment of a condition related to your digestive system. I am happy to accept self-referrals with a direct email message to northscope.gastroenterology@gmail.com.

Before your clinic review, you may be asked to undergo tests such as blood tests, urine tests or stool/faeces tests (you collect a sample of your urine or poo for analysis). The majority of consultations are via tele-health or video consultations with flexible timing out of hours for working individuals.

A history of your symptoms will be taken as well as a review of any medications you are on.
You may be referred on for some of the following radiology tests, depending on your condition: ultrasound scan, CT scan or MRI.

Fees and Charges Categorisation

Fees apply

Fees and Charges Description

Byron is a Southern Cross Affiliated Provider and NIB First Choice member.

Hours

Mon – Fri 9:00 AM – 4:30 PM

Contact me during business hours, Monday to Friday, for enquiries and appointments by telephone. I am happy to be contacted via email and will usually respond within 48 hours. I am able to offer appointments out of hours if needed.  Closed on public holidays.

Public Holidays: Closed Labour Day (28 Oct), Northland Anniversary (27 Jan), Waitangi Day (6 Feb), Good Friday (18 Apr), Easter Sunday (20 Apr), Easter Monday (21 Apr), ANZAC Day (25 Apr), King's Birthday (2 Jun), Matariki (20 Jun).
Christmas: Open 23 Dec — 24 Dec. Closed 25 Dec — 26 Dec. Open 27 Dec. Closed 28 Dec — 29 Dec. Open 30 Dec — 31 Dec. Closed 1 Jan — 2 Jan. Open 3 Jan. Closed 4 Jan — 5 Jan. Open 6 Jan — 10 Jan.

Languages Spoken

English

Procedures / Treatments

Gastroscopy

This is a procedure which allows the doctor to see inside your oesophagus, stomach, and the first part of the small intestine (duodenum) and examine the lining directly. What to expect The gastroscope is a plastic-coated tube about as thick as a ballpoint pen and is flexible. It has a tiny camera attached that sends images to a viewing screen. During the test you will swallow the tube but the back of your throat is sprayed with anaesthetic so you don’t feel this. You will be offered a sedative (medicine that will make you sleepy but is not a general anaesthetic) as well. If the doctor sees any abnormalities they can take a biopsy (a small piece of tissue) to send to the laboratory for testing. This is not a painful procedure and will be performed at the day stay unit in a theatre suite (operating room) by a specialist doctor with nurses assisting. Complications from this procedure are very rare but can occur. They include: bleeding after a biopsy, if performed an allergic reaction to the sedative or throat spray perforation (tearing) of the stomach with the instrument (this is a serious but extremely rare complication). Before the procedure You will be asked not to eat anything from midnight the night before and not to take any of your medications on the day of the procedure. After the procedure You will stay in the day stay unit until the sedation has worn off which usually takes 1-2 hours. You will be given something to eat or drink before you go home. If you have been sedated, you are not to drive until the following day. If biopsies are taken these will be sent for analysis and results are available within 2-3 weeks. A report and copies of these are sent to your GP.

This is a procedure which allows the doctor to see inside your oesophagus, stomach, and the first part of the small intestine (duodenum) and examine the lining directly. 
 
What to expect
The gastroscope is a plastic-coated tube about as thick as a ballpoint pen and is flexible.  It has a tiny camera attached that sends images to a viewing screen.  During the test you will swallow the tube but the back of your throat is sprayed with anaesthetic so you don’t feel this.  You will be offered a sedative (medicine that will make you sleepy but is not a general anaesthetic) as well.  If the doctor sees any abnormalities they can take a biopsy (a small piece of tissue) to send to the laboratory for testing. 
This is not a painful procedure and will be performed at the day stay unit in a theatre suite (operating room) by a specialist doctor with nurses assisting.
 
Complications from this procedure are very rare but can occur. They include:
  • bleeding after a biopsy, if performed
  • an allergic reaction to the sedative or throat spray
  • perforation (tearing) of the stomach with the instrument (this is a serious but extremely rare complication).
Before the procedure
You will be asked not to eat anything from midnight the night before and not to take any of your medications on the day of the procedure.
 
After the procedure
You will stay in the day stay unit until the sedation has worn off which usually takes 1-2 hours.  You will be given something to eat or drink before you go home.  If you have been sedated, you are not to drive until the following day.
 
If biopsies are taken these will be sent for analysis and results are available within 2-3 weeks.  A report and copies of these are sent to your GP.
Colonoscopy

This is a procedure which allows the doctor to see inside your large bowel and examine the surfaces directly and take biopsies (samples of tissue) if needed. Treatment of conditions can also be undertaken. What to expect The colonoscope is a flexible plastic-coated tube a little thicker than a ballpoint pen which has a tiny camera attached that sends images to a viewing screen. You will be given a sedative (medicine that will make you sleepy but is not a general anaesthetic). The tube is passed into the rectum (bottom) and gently moved along the large bowel. The procedure takes from 10 minutes to 1 hour and your oxygen levels and heart rhythm are monitored throughout. The procedure is performed in a day stay operating theatre. Before the procedure You will need to follow a special diet and take some laxatives (medicine to make you go to the toilet) over the days leading up to the test. Risks of a colonoscopy are rare but include: bleeding if a biopsy is performed allergic reaction to the sedative perforation (tearing) of the bowel wall.

This is a procedure which allows the doctor to see inside your large bowel and examine the surfaces directly and take biopsies (samples of tissue) if needed.  Treatment of conditions can also be undertaken.
 
What to expect
The colonoscope is a flexible plastic-coated tube a little thicker than a ballpoint pen which has a tiny camera attached that sends images to a viewing screen. You will be given a sedative (medicine that will make you sleepy but is not a general anaesthetic). The tube is passed into the rectum (bottom) and gently moved along the large bowel.  The procedure takes from 10 minutes to 1 hour and your oxygen levels and heart rhythm are monitored throughout.
The procedure is performed in a day stay operating theatre. 
 
Before the procedure
You will need to follow a special diet and take some laxatives (medicine to make you go to the toilet) over the days leading up to the test.
 
Risks of a colonoscopy are rare but include:     
  • bleeding if a biopsy is performed          
  • allergic reaction to the sedative
  • perforation (tearing) of the bowel wall.
Capsule Endoscopy

This technique allows us to examine the entire length of the intestine painlessly without exposure to surgery, endoscopy or radiation. You simply swallow a capsule which has a camera built in to record images via radio frequency signal. This happens while you go about your normal routine during the day and is removed after 8 hours. The test may be indicated for people who have: Ongoing bleeding from the bowel or iron deficiency without a cause seen at gastroscopy or colonoscopy Crohn's disease which may be affecting the small bowel Polyps or tumours in the small bowel. Byron offers the only pill camera service in Northland.

This technique allows us to examine the entire length of the intestine painlessly without exposure to surgery, endoscopy or radiation. You simply swallow a capsule which has a camera built in to record images via radio frequency signal. This happens while you go about your normal routine during the day and is removed after 8 hours.

The test may be indicated for people who have:

  • Ongoing bleeding from the bowel or iron deficiency without a cause seen at gastroscopy or colonoscopy
  • Crohn's disease which may be affecting the small bowel
  • Polyps or tumours in the small bowel.
Byron offers the only pill camera service in Northland.
Hepatitis

This is inflammation of the liver, commonly caused by viruses. Hepatitis B and C are viruses that can cause chronic (long term) inflammation and damage to the liver. These viruses are passed from person to person through body fluids. For more information about Hepatitis B and C see https://www.hepatitisfoundation.org.nz/ Alcohol can affect the liver and cause inflammation which, if long term, can damage the liver permanently.

This is inflammation of the liver, commonly caused by viruses.  Hepatitis B and C are viruses that can cause chronic (long term) inflammation and damage to the liver. These viruses are passed from person to person through body fluids.  For more information about Hepatitis B and C see https://www.hepatitisfoundation.org.nz/
Alcohol can affect the liver and cause inflammation which, if long term, can damage the liver permanently.
Cirrhosis

Cirrhosis is the term used to describe a diseased liver that has been badly scarred, usually due to many years of injury. Many people who have developed cirrhosis have no symptoms or have only fatigue, which is very common. However, as the cirrhosis progresses, symptoms often develop as the liver is no longer able to perform its normal functions. Symptoms include: swollen legs and an enlarged abdomen easy bruising and bleeding frequent bacterial infections malnutrition, especially muscle wasting in the temples and upper arms jaundice (a yellow tinge to the skin and eyes). Cirrhosis is diagnosed using a number of tests including: blood tests, ultrasound scans and a biopsy of the liver. Treatment options depend on the severity of damage to the liver and include dietary changes and avoidance of substances such as alcohol that can further damage the liver. Medication may be given to prevent complications and treat symptoms of liver failure. There is no cure other than liver transplantation.

Cirrhosis is the term used to describe a diseased liver that has been badly scarred, usually due to many years of injury. Many people who have developed cirrhosis have no symptoms or have only fatigue, which is very common. However, as the cirrhosis progresses, symptoms often develop as the liver is no longer able to perform its normal functions.
Symptoms include:
  •    swollen legs and an enlarged abdomen
  •    easy bruising and bleeding
  •    frequent bacterial infections
  •    malnutrition, especially muscle wasting in the temples and upper arms
  •    jaundice (a yellow tinge to the skin and eyes). 

Cirrhosis is diagnosed using a number of tests including: blood tests, ultrasound scans and a biopsy of the liver.

Treatment options depend on the severity of damage to the liver and include dietary changes and avoidance of substances such as alcohol that can further damage the liver. Medication may be given to prevent complications and treat symptoms of liver failure. There is no cure other than liver transplantation.

Peptic Ulcers

Peptic ulcers are sores or eroded areas that form in the lining of the digestive tract. They usually occur in the stomach (gastric ulcer) or in the duodenum (duodenal ulcer), which is the first part of the small intestine. People with peptic ulcers can have a wide variety of symptoms and signs, can be completely symptom-free or, much less commonly, can develop potentially life-threatening complications such as bleeding. Signs and symptoms of ulcers include: pain / burning or discomfort (usually in the upper abdomen) bloating an early sense of fullness with eating lack of appetite nausea vomiting bleeding, which is made apparent by blood in the stool, either in noticeable or microscopic amounts (very brisk bleeding will result in black and tarry stools that smell bad). Smoking, alcohol, anti-inflammatory medication and aspirin increase the risk of developing ulcers. Psychological stress and dietary factors (once thought to be the cause of ulcers) do not appear to have a major role in their development. Helicobacter pylori, a bacteria that is frequently found in the stomach is a major cause of stomach ulcers. If this is found you will be given a course of antibiotics. Diagnosis is made by the history, examination and sometimes blood tests. You may be asked to have a gastroscopy (see above) to clarify the diagnosis and aid with treatment. Treatment consists of medication to reduce the amount of acid in the stomach which aids in the healing of ulcers and avoidance of things that cause ulcers in the first place.

Peptic ulcers are sores or eroded areas that form in the lining of the digestive tract. They usually occur in the stomach (gastric ulcer) or in the duodenum (duodenal ulcer), which is the first part of the small intestine.
People with peptic ulcers can have a wide variety of symptoms and signs, can be completely symptom-free or, much less commonly, can develop potentially life-threatening complications such as bleeding. Signs and symptoms of ulcers include:
  • pain / burning or discomfort (usually in the upper abdomen)
  • bloating
  • an early sense of fullness with eating
  • lack of appetite
  • nausea
  • vomiting
  • bleeding, which is made apparent by blood in the stool, either in noticeable or microscopic amounts (very brisk bleeding will result in black and tarry stools that smell bad).
Smoking, alcohol, anti-inflammatory medication and aspirin increase the risk of developing ulcers. Psychological stress and dietary factors (once thought to be the cause of ulcers) do not appear to have a major role in their development.
Helicobacter pylori, a bacteria that is frequently found in the stomach is a major cause of stomach ulcers.  If this is found you will be given a course of antibiotics.
Diagnosis is made by the history, examination and sometimes blood tests.  You may be asked to have a gastroscopy (see above) to clarify the diagnosis and aid with treatment.
Treatment consists of medication to reduce the amount of acid in the stomach which aids in the healing of ulcers and avoidance of things that cause ulcers in the first place.
Inflammatory Bowel Disease (IBD)

There are two types of IBD, ulcerative colitis and Crohn’s disease. In these conditions, the immune system attacks the lining of the colon causing inflammation and ulceration, bleeding and diarrhoea. In ulcerative colitis this only involves the large intestine, whereas in Crohn’s disease areas within the entire intestine can be involved. Both diseases are chronic (long term) with symptoms coming (relapse) and going (remission) over a number of years. Symptoms depend on what part of the intestine is involved but include: abdominal pain diarrhoea with bleeding tiredness fevers infections around the anus (bottom) weight loss can occur if the condition has been present for some time. Diagnosis is made when the symptoms, examination and blood tests suggest inflammatory bowel disease, infection is ruled out, and you undergo a colonoscopy with biopsy. Treatment depends on the severity of the symptoms and what part of the intestine is affected. Medication is aimed at suppressing the immune system, which is harming the lining of the bowel. This is done via oral or intravenous medication as well as medication given as an enema (via the bottom). Other treatments include changes in the diet to optimise nutrition and health. Treatment in some cases requires surgery to remove affected parts of the bowel. For more information see www.crohnsandcolitis.org.nz

There are two types of IBD, ulcerative colitis and Crohn’s disease.  In these conditions, the immune system attacks the lining of the colon causing inflammation and ulceration, bleeding and diarrhoea.  In ulcerative colitis this only involves the large intestine, whereas in Crohn’s disease areas within the entire intestine can be involved.  Both diseases are chronic (long term) with symptoms coming (relapse) and going (remission) over a number of years.
Symptoms depend on what part of the intestine is involved but include:                          
  •  abdominal pain
  •  diarrhoea with bleeding
  •  tiredness
  •  fevers
  •  infections around the anus (bottom) 
  •  weight loss can occur if the condition has been present for some time.
Diagnosis is made when the symptoms, examination and blood tests suggest inflammatory bowel disease, infection is ruled out, and you undergo a colonoscopy with biopsy.
Treatment depends on the severity of the symptoms and what part of the intestine is affected.  Medication is aimed at suppressing the immune system, which is harming the lining of the bowel.  This is done via oral or intravenous medication as well as medication given as an enema (via the bottom).  Other treatments include changes in the diet to optimise nutrition and health.  Treatment in some cases requires surgery to remove affected parts of the bowel.  For more information see  www.crohnsandcolitis.org.nz

Disability Assistance

Wheelchair access, Wheelchair accessible toilet, Mobility parking space

Additional Details

Face to face / Kanohi ki te Kanohi, Phone, Online / virtual / app

Parking

Free patient parking is provided at Kensington Hospital

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Contact Details

Urgent & patient self-referrals available

12 Kensington Avenue
Whangarei

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Street Address

12 Kensington Avenue
Whangārei

Postal Address

PO Box 8121
Kensington
Whangārei 0145

This page was last updated at 2:23PM on May 6, 2024. This information is reviewed and edited by Byron Theron – Gastroenterologist.