Foreign bodies in the esophagus. A study of causative factors

Two hundred and twenty-nine patients were studied in an attempt to determine the main causative factors behind their having a residual foreign body in the esophagus. Strictures were present in 13%. Fifty-two percent of the patients with stricture had been hospitalized more than once for treatment of foreign body impaction; this was the case in only 8.5% of the rest of the patients (p<0.001). More than half of the patients aged 15 years or younger had a foreign body in the hypopharynx. This location was extremely uncommon in adults (p<0.001). The hypothesis of spasm distal to an esophageal foreign body as the cause for obstruction in patients without esophageal stricture was supported by the following findings: spontaneous disimpaction occurred in more than one-third of the patients and became more frequent as time progressed; 63% of 16 patients given spasmolytic drugs experienced spontaneous disimpaction of the foreign body; half of the patients had the foreign body in the proximal esophagus distal to the narrower passage of the upper esophageal sphincter; foreign body impaction in the esophagus turned out to be a once-only event in 86% of the patients; and 21% of the patients had a disorder of the central nervous system and had been hospitalized significantly more often because of food impaction than the other patients. The findings indicate that adults with a history of impaction of foodstuff lacking sharp bones and who do not have stricture suffer food impaction because of spasm of the esophageal smooth muscle, and can be treated accordingly.