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The specific advantage of this nasal speculum lies in its construction whereby the two blades are replaced by a single conical tube. By this method medicinal agents which are applied to the intranasal structures do not come into contact with the nostril, and thus accidental distribution or trauma to these parts is prevented. The streaking or smearing of the nasal vestibule when caustic agents are used is not uncommon. There result burning, irritation, staining and, sometimes, a temporary scarring which is disagreeable both to the physician and to the patient. With the ordinary nasal speculum it is rather difficult at times to avoid these effects, even when one uses a great deal of caution. With the use of the guarded nasal speculum, such incidents are avoided.
The contour of the speculum aids in focusing the light directly on the area to be cauterized. This region becomes prominent and more easily
GOLDMAN IB. A NEW NASAL SPECULUM. Arch Otolaryngol. 1934;19(5):618. doi:10.1001/archotol.1934.03790050083013
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