Dilatation: widening a narrowed food pipe

When might dilatation help?

A narrowing may be described as a stricture or stenosis. You may notice solid food catching, need to chew for longer, avoid certain foods or rely on softer meals. Dilatation can make eating easier and reduce food sticking when a narrowing is responsible.

Difficulty swallowing needs assessment. I do not assume it is simply reflux or normal ageing. Gastroscopy lets me examine the lining and take biopsies to check for inflammation, EoE and cancer. A tight or unusual narrowing may need biopsy results or further imaging before treatment.

If the food pipe is not narrowed, stretching it may not address the problem. Persistent symptoms can need tests of how its muscles work. Difficulty starting a swallow, coughing or choking may need a different swallowing assessment.

Different narrowings need different treatment

These examples show different patterns, not stages that everyone passes through. Their appearance alone does not establish the diagnosis. Biopsies and your history help distinguish them.

Balloon or Savary: how I choose

I usually use a balloon, including for suitable postsurgical narrowings. For selected very tight or longer oesophageal narrowings, including some cases of EoE, I may use a wire-guided Savary-style dilator. Neither method is the best choice for every stricture. I consider its cause, position, length, tightness and the previous response.

With a through-the-scope balloon, a slim catheter passes through the gastroscope. The balloon is positioned across the narrowing, expanded to a selected size, then deflated and removed. Expansion applies pressure outwards at the narrowed area.

A Savary-Gilliard dilator is a smooth, tapered tube passed over a guidewire already positioned through the narrowing. The gastroscope is withdrawn while the wire stays in place. The dilator slides along the wire and widens the narrowed segment as its taper passes through. Selected sizes may be used in sequence. It does not inflate and is not left inside.

Savary-style devices belong to the bougie family. Other wire-guided bougie systems include the American Dilation System. Brand names describe equipment, not a different diagnosis. The animation explains the principle and is not a guide to performing the procedure.

What improvement can I expect?

The aim is to swallow more comfortably, have less food sticking and eat a wider range of foods. The amount and duration of improvement vary. Dilatation cannot guarantee completely normal swallowing, remove the underlying tendency to scar or correct every muscle problem.

At follow-up, I check which foods still catch, whether you can eat and drink enough, any weight change and how long the improvement lasted. Those details help decide whether another dilatation, a change in treatment or further investigation would be useful.

Why might I need more than one session?

A very tight or long narrowing may need to be opened in stages. Another session can be part of the original plan rather than a sign that treatment has failed. The interval and number are individual; there is no fixed course that suits everyone.

Scar tissue can also tighten again after an initial improvement. Treating reflux or EoE reduces continuing injury, but some strictures still recur. Contact me or your GP if swallowing deteriorates rather than waiting until food becomes completely stuck.

If repeated dilatation is not giving lasting benefit, I reassess the diagnosis, inflammation, nutrition and the pattern of scarring. Selected cases may need an injection into the scar, an endoscopic incision, a temporary stent or surgical advice. These have their own risks and are not routine additions for everyone.

Before and during the procedure

• Follow the fasting instructions from your endoscopy service. Tell the team if food remains stuck or you cannot manage fluids; you may need assessment before a routine appointment.
• Provide a complete medicine list, including blood thinners and diabetes medicines. Do not stop them yourself. If a medicine needs to be withheld, the instructions should specify when to stop and restart it. Contact the team if anything is unclear.
• Tell the team about previous food-pipe surgery, radiotherapy, a previous tear or perforation, allergies and earlier problems with sedation.
• We discuss the intended benefit, risks, alternatives and possibility of repeat treatment before consent. Sedation and pain relief are tailored to the procedure and your health.
• You are usually positioned on your left side. Breathing, oxygen level, pulse and blood pressure are monitored. The narrowing is assessed before the chosen treatment is carried out.
• If you receive sedation, arrange a responsible adult to take you home and follow the service's supervision and driving restrictions. Confirm the clinic location on the Contact page.

Risks and how they are managed

Dilatation is an established treatment, but stretching a narrowing has more risk than simply looking with a gastroscope. Your individual risk depends on the narrowing and the treatment needed.

Eating, medicines and recovery

The team checks that you are recovering appropriately and can manage fluids before discharge. Follow your own instructions about when to start drinking, which foods to choose and when to return to your usual diet. Do not test the result immediately with a large or difficult mouthful.

Continue prescribed treatment for reflux or EoE unless advised otherwise. Follow the individual restart instructions for any medicines that were withheld. Your endoscopy report, and histology report when biopsies return, document findings and recommended follow-up.

Use the procedure service's discharge contact for concerns after treatment. Consultation reception numbers are not a substitute for urgent assessment.

Is every narrowing treated this way?

No. Achalasia is a problem with relaxation of the muscle at the lower end of the food pipe and with its swallowing contractions. Its larger pneumatic-balloon treatment is different from routine stricture dilatation and needs a separate discussion of options and risks.

Balloons can also be used for selected narrowings at the stomach outlet, surgical joins elsewhere or some bowel strictures. The reason for treatment, endoscope route and risks differ. This guide mainly concerns benign oesophageal narrowing; it does not provide a treatment plan for all digestive-tract stenoses.