Specialist Upper Gastrointestinal & Bariatric Surgeon

Secretary: Nicola Symons

Telephone: 01872 226150

Specialist Upper Gastrointestinal & Bariatric Surgeon


As a specialist in achalasia, Mr Clarke follows current national and international guidelines (see resources), using up-to-date investigation techniques, as well as keyhole (laparoscopic) surgery.


What is achalasia?

 Achalasia is a disorder of the gullet (oesophagus) in which the muscles fail to move food along properly and the valve at the lower end of the oesophagus fails to open, preventing food passing into the stomach normally. It is an uncommon condition that is diagnosed in 1 in 100,000 people annually, affects males and females equally and is commonest between 30 -60 years of age.

What causes achalasia?

Damage to or loss of the nerves in the wall of the gullet (oesophagus). The underlying cause for this remains largely unknown, however there may be some association with certain viral or autoimmune conditions (in which the immune system attacks healthy cells and tissues). In patients with achalasia there is thought be an increased likelihood of developing oesophageal cancer in the future.

What symptoms does it cause?

The commonest symptoms include difficulty swallowing (dysphagia), pain on swallowing and/or regurgitation of undigested food after meals. In some patients this can cause choking, coughing , heartburn or weight loss.

In some patients there may be no symptoms and it is incidentally detected during investigations for other diseases.

How is it diagnosed?

Three investigations are normally required:-

Upper GI endoscopy

A thin telescope is passed via the mouth using local anaesthetic and/or sedation to inspect the gullet (oesophagus), stomach and duodenum.

Barium swallow

A white dye containing barium is swallowed and its movement along the gullet towards the stomach is videoed using x-ray.

Oesophageal high resolution manometry

This is the gold standard investigation for achalasia. A thin tube is passed via the nose and a series of pressure measurements are made whilst the patient swallows small sips of water to assess the function of the gullet (oesophagus).

What are the treatment options?

Current recommendations are that graded pneumatic dilatation or surgical myotomy are recommended as initial treatment for those fit and willing to undergo these procedures. Injection of botulinum toxin is recommended for those patients not suitable for dilatation or surgery. Medication is recommended for those not suitable for dilatation or surgery and in whom botulinum toxin injection has failed.

Each of these treatments is outlined below:-

Pneumatic Dilatation (stretch muscle with balloon)

Under sedation or a full general anaesthetic, a balloon (3-4cm in diameter) is passed into the gullet (oesophagus) via the mouth. Under x-ray guidance it is inflated to stretch and disrupt the muscles of the valve at the lower end of the gullet. This may need to be repeated after one or more years. There is a risk of rupture of the gullet that may require surgery (around 1 in 50 patients).

Surgery (Heller’s cardiomyotomy & Dor fundoplication)
Before surgery

Once a decision is made to go ahead with surgery, you will need to attend the pre-assessment clinic, at which a number of routine checks and blood tests will be performed.

The operation

Surgery is performed with keyhole (laparoscopic) surgery. Five keyhole incisions are made in the upper part of the tummy (abdomen). The operation involves dividing the muscles (myotomy) of the valve at the lower end of the gullet that fails to relax. The top section of the stomach (fundus) is then stitched across this divided valve to prevent acid or food regurgitating back from the stomach into the gullet. This is known as a ‘fundoplication’ or ‘wrap’. The procedure normally takes 1-2 hours.

After surgery

Patients are normally ready to be discharged the following day after surgery. You will be discharged with painkillers and written post-operative instructions. All stitches are dissolvable. The waterproof dressings are suitable for the shower and can be removed after 7 days.

You are advised to drink fluids only for the initial 24 hours after surgery before commencing a mashed diet for the following 3 weeks. More solid foods can then be gradually reintroduced as tolerated.

Recovery can take around two weeks however you are advised to avoid heavy lifting for up to 6 weeks after surgery.

What are the risks of surgery?
  • Shoulder tip pain – This is common after keyhole surgery and normally resolves within 24 hours. It is due to gas used to inflate the abdomen during surgery
  • Bleeding – This can occur with any operation and on occasions may require a blood transfusion (unless the patient expresses a wish not to). It is more common in patients taking blood thinning medications (e.g. warfarin, clopidogrel, apixaban, rivaroxaban)
  • Infection – This may affect the wounds, lungs or site of intravenous lines.
  • Blood clots in the legs or lungs (deep vein thrombosis or pulmonary embolism) – Patients wear antiembolism stockings and may receive heparin injections to reduce this risk
  • Damage to nearby structures – this is uncommon
  • Bloating – this can affect upto 1 in 3 patients and patients may find it diffciult to belch
  • Flatulence – due to bloating and inability to belch in some patiens this can lead to increase flatulence
  • Diarrhoea – some patients develop diarrhoea following surgery, the cause for which is not always clear. This may require management with medication to control.
  • Dysphagia – difficulty swallowing is relatively common in the initial post-operative period but normally improves by 6 weeks. In rare circumstances it may persist longer than 6 months and may require further intervention.
  • Recurrence – around 20% of patients may require additional treatment for recurrent symptoms within 5 years

The muscle at the lower end of the gullet (oesophagus) can be relaxed using medications such as nitrates or calcium channel blocker drugs (e.g. nifedipine). These may provide temporary relief and are not effective in all aptients.

Botulinum toxin (Botox)

Botulinum toxin is injected painlessly into the muscle of the valve at the lower end of the gullet (oesophagus) via endoscopy. This can be effective for a few months to years.


Very down to earth, made me feel very comfortable and reassured

May 2024

Extremely proficient, professional and considerate surgeon

April 2024

I felt confident and safe from the first appointment. I would recommend Michael Clarke especially to anyone worried about forthcoming op

March 2024

Very professional and easy going manner. Excellent understanding of my understanding and ability to suggest courses of action

February 2024

Very professional, personable and I felt listened to

February 2024

Mr Clarke was most reassuring, provided clear guidance and options. Altogether inspired confidence throughout

December 2023

Mr Clarke gave me confidence in his knowledge from our first meeting. he also listened to my questions

September 2023

Explained things well in a way people understand, good bedside manner

September 2023

Mr Clarke not only put me at ease at the first consultation but such is his manner and explanation that I felt confident throughout. If surgery can be a good experience, this was.

4th October 2022

I felt completely at ease, a friendly approach and a sense of humour. Would definitely recommend.

1st July 2022

Excellent Consultant who made me feel totally at ease and confident that he would return me to full health - which he did.

29th April 2022

Very pleasant surgeon to talk to and very reassuring. Explained everything in clear language.

20th October 2021

Mr Clarke was courteous and respectful to me and explained my condition and treatment required. I was very happy with my post op recovery and had very little pain. I would not hesitate to contact Mr Clarke if I ever needed his help again.

29th May 2021

Mr Clarke made me feel completely at ease and confident in his ability through his mannerisms and professionalism. Mr Clarke was exceptional on the day. I'd be happy for him perform surgery on me again.

15th April 2021

I felt that Mr Clarke listened to me really well and thoroughly investigated my symptoms before deciding surgery was the best option

22nd March 2021

The whole experience from start to finish was done in a very empathetic and professional way. I was given ample time for questions and all tension and worry was removed form the procedure.

9th March 2021

I highly commend his approachable friendly manner. He made me feel at ease and informed through all aspects of my treatment and surgery.

15th January 2020

Surgery, care and follow-up were carried out to a very high standard. I wouldn't hesitate to recommend Mr Clarke to others.

18th December 2019

I found Mr Clarke extremely confident in this line of surgery, knowledgeable and very nice. Had a great ability to keep me at ease throughout.

8th June 2019

Perfect from referral to discharge. Everything explained fully. Every discussion with Mr Clarke was perfectly judged.

1st December 2018

Mr Clarke was outstanding from the start of my treatment to the end. He was empathetic, knowledgeable, respectful and made you feel at ease.

23rd August 2018

Mr Clarke was extremely efficient both in consultation and surgery. He was very caring and took time to explain procedures. I would highly recommend him.

24th January 2018

Very pleased with outcome of op from Mr Clarke. Just like 2016 he was very helpful and so professional. Would definitely recommend.

27th January 2018

Excellent manner both in consultation, pre- and post-op. Would definitely be happy to see him and recommend to others requiring surgery.

13th October 2017

Mr Clarke made the whole experience a breeze. So calm, polite and understanding of patients' needs.

13th September 2017

My introduction to Mr Clarke was met with a warm smile and a firm handshake. He was professional and friendly and put me at ease. I have no hesitation in recommending Mr Clarke.

9th August 2017

Mr Clarke did everything he said he would. Appointments came through quickly and I was made to feel comfortable and I had confidence in Mr Clarke from the outset.

1st June 2017

Mr Clarke has been most helpful to my specific situation. He made allowances for me and adapted to my particular health issues.

24th February 2017

Mr Clarke could not have done more for me. He looked after me and made me feel important and safe.

23rd February 2017

Whole experience was very professional, so felt safe in his hands. Communication so important and Mr Clarke was brilliant.

1st December 2016

Due to unforeseen circumstances, the contact details for my secretary have changed. Please use the new contact details for Nicola Symons listed in the top right hand corner of my main webpage.

If you have been in touch using the old contact details in the last 14 days and not yet received a reply, please contact me using the new contact details.