A manual of otology for students and practitioners . in candle. The light may be attached to astand with a flexible neck and extensible tube to varythe height (Fig. 19). With this apparatus the light maybe placed in any desired position, or the same result maybe attained by mounting it upon a wall bracket. AnArgand gas burner attached to the wall by a bracketmoving in any direction gives very satisfactory illumina-tion. A condensor and reflector may be used if emergencies outside of the office one may use anordinary coal oil lamp with Argand burner, or even acandle when other source
A manual of otology for students and practitioners . in candle. The light may be attached to astand with a flexible neck and extensible tube to varythe height (Fig. 19). With this apparatus the light maybe placed in any desired position, or the same result maybe attained by mounting it upon a wall bracket. AnArgand gas burner attached to the wall by a bracketmoving in any direction gives very satisfactory illumina-tion. A condensor and reflector may be used if emergencies outside of the office one may use anordinary coal oil lamp with Argand burner, or even acandle when other sources of illumination are the examiner is accustomed to the electric light and usessome of the other forms of illumination he should make METHOD OF EXAMINATION 51 proper allowance for the resulting change in color of theparts, as they will not appear so white. Numerous formsof apparatus have been devised, in which the electriccandle is worn on the examiners head, the current beingobtained from a battery or from the regular house Fig. 19.—Electric light stand. The light from these is very useful in operations, but theydo not give that definition which is essential to obtaina satisfactory view of the membrana tympani. Mirror.—In selecting a forehead mirror certain pointsshould be borne in mind. Three to three and one-halfinches is the proper diameter. A larger one is more 52 EXAMINATION OF THE PATIENT difficult to manage and tiresome to wear arid presents nopoints of advantage. The central aperture should befrom one-half to five-eighths inch in diameter. Pro-ficiency in the use of the mirror, if one with a small openingis used, can only be acquired after much pains and time,and even then it will be found much less convenient forevery-day work. The ball should be attached to theperiphery of the frame (Fig. 20), thus allowing much morefreedom of motion than if attached to the back. Themirror is connected with the headband bv a double ball-
Size: 1028px × 2430px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectear, bookyear1916
