A manual of diseases of the nose and throat . d one-half inches indiameter, with a five-sixteenths of an inch circularopening in its centre, and have a focal distance ofabout eight inches. It should be attached to a headband by a single ball-and-socket joint. Some head bands are provided with a nose rest, butthe author believes that this only adds weight to themirror without increasing the stability of the instru-ment. To illuminate properly any part of the respiratorytract the patient should be seated in a high-backed 42 EXAMINATION OF UPPER RESPIRATORY TRACT. chair, with the head resting aga
A manual of diseases of the nose and throat . d one-half inches indiameter, with a five-sixteenths of an inch circularopening in its centre, and have a focal distance ofabout eight inches. It should be attached to a headband by a single ball-and-socket joint. Some head bands are provided with a nose rest, butthe author believes that this only adds weight to themirror without increasing the stability of the instru-ment. To illuminate properly any part of the respiratorytract the patient should be seated in a high-backed 42 EXAMINATION OF UPPER RESPIRATORY TRACT. chair, with the head resting against the back of thechair. The examiner should be seated upon a stool,similar to a piano stool, capable of being raised orlowered, in order that he may accommodate his heightto that of the patient. He should then arrange hisown head and the light so that both may be on a levelwith the patients ear. The head mirror should be soadjusted that the opening in the centre of the mirrorwill be opposite the pupil of his left eye (Fig. 7). The Fig. Head mirror and band, with its proper adjustment over the left eye. mirror should then be rotated to the right, to the left,up or down, as the case may be, so that the light maybe reflected upon the face of the patient. The exam-iners head must then be moved forward or backwarduntil in such a position as to give the greatest illumi-nation of the part to be inspected. The distance ofthe mirror (practically that of the examiners head) EXAMINATION OF UPPER RESPIRATORY TRACT. 43 from the part to be inspected is the same as the focaldistance of the mirror. The difficulty that every beginner experiences inattempting to make this adjustment is that instead ofkeeping his own head fixed and moving the mirror toilluminate different portions, he attempts to keep themirror fixed and moves his head in order to change thedirection of the illuminating rays. The head is thusplaced in strained and unnatural positions. He isunable to look at the illuminated
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherne, booksubjectnose
