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One of the greatest dangers to the physician handling patients suffering from tuberculosis lies in having masses of muco-pus thrown into his face by the patient sneezing or coughing while the nose, pharynx or larynx is being examined. The greatest danger exists in the public clinics where the patients are not over-particular to restrain a desire to cough while being examined. These patients are also apt to have very irritable throats which render them more liable to cough while the tongue depressor or the laryngoscope is being used.
So far as I know, a glass in metal frame suspended on a movable arm between the face of the patient and the face of the physician is the only device which has been used to protect the physician up to this time. This is certainly a great protection, but it has many obvious disadvantages, among which are the clouding of the
KERR IJ. A NEW SHIELD FOR USE IN NOSE AND THROAT EXAMINATIONS.. JAMA. 1906;XLVII(10):775-776. doi:10.1001/jama.1906.25210100047003