Swallowing is usually an automatic process that allows food and liquids to move from the mouth into the stomach. When the muscles at the lower end of the oesophagus do not relax properly, food can remain trapped in the oesophagus and cause increasing difficulty with swallowing. One condition associated with this problem is achalasia, a disorder in which the normal movement of food towards the stomach becomes impaired.

POEM, or Peroral Endoscopic Myotomy, is a minimally invasive endoscopic procedure developed to address the abnormal muscle tightness responsible for difficulty allowing food to pass into the stomach. Understanding what happens during POEM can help explain why the procedure may be considered for selected patients with achalasia and related swallowing disorders.

Achalasia Affects the Normal Movement of Food

The oesophagus uses coordinated muscular contractions to move food down towards the stomach. At its lower end, a muscular valve called the lower oesophageal sphincter normally relaxes when swallowing so that food can enter the stomach.

In achalasia, this relaxation becomes impaired. The oesophageal muscles may also lose their normal coordinated movement. As a result, food and liquid can collect inside the oesophagus instead of passing smoothly into the stomach.

Swallowing Difficulty May Gradually Become More Noticeable

Difficulty swallowing is one of the most recognised symptoms of achalasia, but it may not always begin suddenly. A person may initially notice that solid food feels difficult to pass and later experience similar difficulty with liquids.

Regurgitation of undigested food, chest discomfort, coughing at night and unintended weight loss can also occur in some patients. Because these symptoms may overlap with other digestive conditions, identifying their cause requires appropriate clinical assessment rather than assuming that every swallowing problem is caused by acid reflux.

The Lower Oesophageal Muscle Is Central to POEM

The basic purpose of POEM is to reduce the excessive resistance created by the muscles that prevent food from entering the stomach. During the procedure, an endoscope is passed through the mouth into the oesophagus.

The specialist creates a small entry into the inner lining of the oesophagus and works within the tissue layer beneath it. The tight muscle fibres responsible for the obstruction are then carefully divided. The entry point is subsequently closed using endoscopic techniques. This approach allows the muscle to be treated without making external surgical incisions.

Factors that may be considered before POEM include:

• The nature and duration of swallowing difficulty

• Findings from endoscopic examination

• Oesophageal movement and function

• The degree of lower oesophageal sphincter obstruction

• Previous treatment for achalasia

• Nutritional status and overall health

• Findings from relevant imaging or functional tests

Testing Helps Confirm Whether POEM Is Appropriate

A swallowing complaint alone is not enough to determine whether POEM is suitable. Doctors may use investigations such as upper gastrointestinal endoscopy, oesophageal manometry and imaging studies to understand how the oesophagus is functioning.

Manometry can be particularly useful because it measures pressure and muscle activity within the oesophagus. Endoscopy can help rule out other causes of narrowing or obstruction, while imaging may provide additional information about the structure and movement of the oesophagus.

The results of these investigations help establish whether the symptoms are consistent with achalasia and whether an intervention such as POEM should be considered.

POEM Can Be Tailored to the Muscle Involved

The extent of the muscle incision is not necessarily identical in every patient. The length and location of the myotomy can depend on the type of achalasia and the pattern of abnormal muscle activity. POEM Specialist in Kalkaji, Dr. Kapil Sharma can assess the functional findings and other clinical information when determining whether this procedure is appropriate and how the treatment should be planned. The objective is to relieve the muscular obstruction while taking the individual anatomy and underlying disorder into account.

Previous Treatments May Influence the Treatment Plan

Some patients with achalasia may have undergone earlier procedures, such as pneumatic dilation, botulinum toxin injection or surgical myotomy. Previous treatment can influence the anatomy and may need to be considered before another intervention is planned. POEM can be used in different clinical situations, including selected patients who have previously received treatment. However, suitability depends on the individual's current condition, previous procedures and the specific characteristics of the oesophageal disorder.

Recovery Involves More Than the Endoscopic Procedure

Although POEM does not require a large external incision, the oesophagus still needs time to heal after the muscle has been treated. Patients are generally monitored after the procedure and may initially follow dietary restrictions before gradually returning to normal eating.

Temporary chest discomfort or other digestive symptoms can occur during recovery. Follow-up is important because the response to treatment needs to be assessed over time, particularly in relation to swallowing and the patient's ability to eat comfortably.

Reflux Can Be Considered After POEM

The lower oesophageal sphincter normally helps prevent stomach contents from moving backwards into the oesophagus. Since POEM reduces the muscle's resistance to allow food to pass more easily, some patients may develop or experience increased gastroesophageal reflux afterwards.

This does not mean that POEM has failed. Reflux can be assessed and managed according to the patient's symptoms and clinical findings. Follow-up therefore remains an important part of care after the procedure.

Frequently Asked Questions

Is POEM performed for every swallowing problem?

No. POEM is mainly considered for selected conditions such as achalasia and certain related oesophageal motility disorders. The underlying cause of swallowing difficulty must first be established.

Is POEM an open surgery?

No. POEM is performed endoscopically through the mouth, without the large external incision associated with conventional open surgery.

Can POEM help with achalasia?

POEM is designed to reduce the abnormal muscular resistance at the lower end of the oesophagus and can be an effective treatment option for appropriately selected patients with achalasia.

Can achalasia return after POEM?

Symptoms can persist or recur in some patients after treatment. Continued follow-up allows the response to be assessed and any ongoing symptoms to be investigated.

Conclusion

Achalasia can interfere with the normal passage of food by affecting both oesophageal movement and relaxation of the lower oesophageal sphincter. POEM addresses the muscular component of this problem through an endoscopic myotomy, offering a minimally invasive treatment option for appropriately selected patients.

CTA

If swallowing difficulties have been diagnosed as achalasia or another suitable oesophageal motility disorder, consult Dr. Kapil Sharma, the POEM Specialist in Kalkaji, for appropriate assessment and treatment planning.

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Understand how POEM treats achalasia, why swallowing becomes difficult, how patients are assessed and what recovery and reflux management may involve.

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