The extraction of a foreign body is often most difficult, and in some cases the usual instruments prove unequal to the task. This being so, the use of certain new instruments is a great help, among which is the expanding esophagoscope which I have designed.1
The great difficulty met in using some instruments is due to the tendency of the wall of the esophagus to contract and to press the ends of the tubes together. In designing my instrument, I aimed to remove this disadvantage.2
The expanding esophagoscope consists of a special extension mechanism, permitting adjustment of the grooved halves of the speculum in relation to each other as desired and helping to resist the considerable pressure of the esophagus, and various interchangeable grooved speculums differing in size and shape, viz., round, rectangular, square and oval.
In its closed position, thanks to its slenderness, the instrument can be easily introduced
MATIS EI. USE OF EXPANDING ESOPHAGOSCOPE FOR EXTRACTION OF FOREIGN BODIES. Arch Otolaryngol. 1940;31(2):283–288. doi:10.1001/archotol.1940.00660010285004
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