The surgical management of motility disorders

[Surgical management of primary esophageal motility disorders]

Primary esophageal motility disorders are rare, the most common diagnoses being achalasia and diffuse esophageal spasm. Treatment aims to alleviate symptoms and may be medical, endoscopic, or surgical. Achalasia is most commonly treated by pneumatic dilatation or by laparoscopic Heller cardiomyotomy. Pneumatic dilatation is effective in 60-80% of cases, but functional results deteriorate over time. Surgical treatment is indicated when endoscopic dilatation is contraindicated or has failed. Functional results after cardiomyotomy are satisfactory in 90% of cases and results appear to be stable over time. The need for an associated antireflux procedure and the type of fundoplication remain controversial. For diffuse esophageal spasm, extended esophageal myotomy has yielded satisfactory functional results, but surgical treatment should be reserved for selected patients with severe symptoms.

Current diagnosis and therapy for diffuse esophageal spasm

Diffuse esophageal spasm is a primary esophageal motility disorder characterized by incoordinate esophageal contraction. The etiology is still not clear. This study systemically elucidates the latest advancement in pathogenesis, diagnosis and therapy of diffuse esophageal spasm, and then gives an objective and analytic evaluation. In this article, we also provide new diagnostic and therapeutic strategies for patients with diffuse esophageal spasm.

Successful surgical treatment for diffuse esophageal spasm

A 74-year-old man, who had previously received curative distal gastrectomy for gastric cancer, was admitted to our hospital with severe dysphagia and weight loss. Barium swallow examination revealed the esophagus to have the corkscrew appearance characteristic of diffuse esophageal spasm (DES). This diagnosis was confirmed by esophageal manometry, which revealed intermittent, simultaneous, high-amplitude (30-100 mmHg) contractions after 65% of wet swallows. The muscle layer was also found to be thickened throughout the spastic region. Long esophagomyotomy with fundoplication was performed after treatment with medication proved ineffective. Myotomy proceeded superiorly to the area under aortic arch and inferiorly 3 cm into the cardiac portion. Fluoroscopy of the esophagus after the operation showed the spastic changes to be absent, and the patient showed improved clinical signs. We therefore recommend long myotomy of the esophageal wall with antireflux surgery for DES with sever dysphagia that is resistant to conservative treatment.

[Laparoscopic esophagotomy without diverticular resection for treating epiphrenic diverticulum in hypertonic lower esophageal sphincter]

INTRODUCTION

As a rule, epiphrenic diverticulum occurs in combination with most diverse forms of dysfunction in the lower esophageal sphincter (LES) and/or in the esophagus itself. The main symptoms are dysphagia, pain, and regurgitation. The operation consists in myotomy, diverticulum resection, and partial fundoplication via abdominal or thoracic approach using conventional or minimally invasive technique. The main risk is postoperative suture dehiscence after diverticular resection. The present study was therefore undertaken to establish whether the operation succeeds in risk patients even without resection of the diverticulum.

PATIENTS AND METHODS

In the period from 1998 to 2001, six patients were investigated preoperatively by means of esophageal manometry, endoscopy, and radiological barium swallow. The four risk patients underwent only myotomy of the LES, if appropriate, in combination with laparoscopic partial fundoplication. Resection of the diverticulum by thoracoscopy or with conventional thoracic technique was also performed in the two patients with normal risk.

RESULTS

Three of the four risk patients showed normal postoperative courses after laparoscopic myotomy and rapidly became free of symptoms and were able to eat normally. One patient died perioperatively of pulmonary complications. After thoracic diverticulum resection, both patients developed postoperative suture dehiscence with a complicated course. Altogether, freedom from symptoms with regard to dysphagia and regurgitation could be attained in five out of six patients over a follow-up period of 6 to 25 months.

CONCLUSION

In patients with epiphrenic diverticulum and disorder of LES function, myotomy alone without resection of the diverticulum may be sufficient to relieve or eliminate symptoms. Laparoscopy and the combination with partial fundoplication are the preferred techniques. In our opinion, this method must be considered in order to reduce the surgical risk in multimorbid and elderly patients.

Treatment of achalasia: the short-term response to botulinum toxin injection seems to be independent of any kind of pretreatment

BACKGROUND

It has been suggested that intrasphincteric injection of botulinum toxin (BTX) may represent an alternative therapy to balloon dilatation in achalasia. The aim of the present study was to test the effectiveness of botulinum toxin injections in achalasia patients, as assessed using lower oesophageal sphincter pressure (LOSP) and symptom scores, and to compare the response in patients with different types of pretreatment (no previous treatment, balloon dilatation, myotomy, BTX injection).

METHODS

Forty patients who presented with symptomatic achalasia were treated with BTX injection (48 injections in 40 patients). Some of the patients had received prior treatment (seven with myotomy, seven with dilatation and eight with BTX). The symptoms were assessed using a global symptom score (0-10), which was evaluated before treatment, 1 week afterwards, and 1 month afterwards. Manometry was also carried out before and after treatment. Three different selections of patients were studied: all patients; untreated patients; and patients with prior BTX, dilatation, or myotomy.

RESULTS

After BTX injection, there was a significant reduction in LOSP (before, 38.2+/-11.3 mmHg; 1 week after, 20.5+/-6.9 mmHg; 1 month after, 17.8+/-6.8 mmHg; P < 0.001). The global symptom score and symptom subscores (dysphagia, regurgitation, chest pain) were significantly decreased after 1 week and 1 month. When the beneficial effects following BTX injection were compared (untreated vs. pretreated), neither changes in LOSP nor beneficial effects on the symptom scores significantly differed. After 6 months, 67.7% of all treated patients were still in symptomatic remission (subgroups: previously untreated patients, 61.5%, n = 26; prior dilatation, 71.4%, n = 7; prior myotomy, 71.4%, n = 7; prior BTX, 73.9%, n = 8).

CONCLUSIONS

BTX injection offers an alternative treatment for achalasia which is safe and can be performed in an outpatient setting. The initial response to BTX, in terms of symptom scores and LOSP, appears to be independent of any prior treatment. A number of patients do not adequately respond to balloon dilatation or myotomy, which are the first-line treatment modalities in achalasia patients. BTX injection can be performed in these patients, and symptomatic benefit can be expected in the same percentages as with BTX injection in untreated patients.

Current concepts on pathophysiology, diagnosis and treatment of diffuse oesophageal spasm

Diffuse oesophageal spasm is a functional oesophageal motility disorder of unknown aetiology, which appears to be due to a disturbance of the normal pharmacological timing of propulsive contraction occurring in the oesophageal body after swallowing. The lack of pathophysiological understanding may be due to the fact that there is more than one pathophysiological pathway causing symptoms of diffuse oesophageal spasm. Barium studies, oesophageal scintigraphy and fiberoptic examination can be helpful in finding the correct diagnosis, but manometry is still the gold standard of diagnostic procedures. Similar to other spastic oesophageal motility disorders, pharmacological treatment of diffuse oesophageal spasm includes nitrates, calcium antagonists, anticholinergics and antidepressants with varying beneficial effects. Botulinum toxin, which provides sufficient treatment as measured by symptom score and manometric patterns in patients with achalasia, was recently evaluated for the treatment of diffuse oesophageal spasm in small patient selections with promising results.

Cricopharyngeal myotomy does not increase the risk of esophagopharyngeal acid regurgitation

OBJECTIVE

It is not known whether cricopharyngeal myotomy predisposes to esophagopharyngeal regurgitation. Using ambulatory, dual pharyngeal, and esophageal pH monitoring before and after cricopharyngeal myotomy, our aim was to determine the effect, if any, of myotomy on the frequency of esophagopharyngeal acid regurgitation.

METHODS

We studied prospectively 18 patients who underwent cricopharyngeal myotomy for pharyngeal dysphagia (10 Zenker's, eight neurogenic dysphagia), of whom 17 agreed to undergo dual pH monitoring preoperatively, and 10 who agreed to both pre- and postoperative monitoring.

RESULTS

Symptoms of gastroesophageal reflux disease were present in 30%. Cricopharyngeal myotomy significantly reduced basal upper esophageal sphincter pressure by 49%, from 37+/-5 mm Hg to 19+/-3 mm Hg (p = 0.007). Esophagopharyngeal regurgitation was a rare event and the frequency of it did not differ between patients and healthy controls. Preoperatively, three regurgitation events in two patients did not differ from the postoperative frequency of a total of two events in the same two patients.

CONCLUSIONS

Increased esophageal acid exposure is common and esophagopharyngeal regurgitation is rare in unselected patients undergoing cricopharyngeal myotomy for pharyngeal dysphagia. Myotomy does not increase the frequency of esophagopharyngeal acid regurgitation in such patients.

Treatment of epiphrenic diverticula

Epiphrenic diverticulum is a rare disorder of the lower esophagus, thought to be related to an esophageal motility disorder. Treatment should involve removal of diverticulum and myotomy. Although the surgery is technically a difficult one, the long-term outcome should be excellent.