Manual of diseases of the ear : including those of the nose and throat in relation to the ear : for the use of students and practitioners of medicine / by Thomas Barr and J. Stoddart Barr.
- Barr, Thomas, 1846-1916
- Date:
- 1909
Licence: In copyright
Credit: Manual of diseases of the ear : including those of the nose and throat in relation to the ear : for the use of students and practitioners of medicine / by Thomas Barr and J. Stoddart Barr. Source: Wellcome Collection.
Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.
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![!•] meatus in this way before introducing the speculum, which might readily conceal such a condition as eczema of the orifice, or excite great pain if there should be a furunculus. The auricle being held backwards in the way described, the speculum (which should be as wide as possible and warmed) is held bv its outer edge with the right hand and passed carefully in with a slight rotatory movement, until the membrane is clearly exposed by the light projected into the speculum. The speculum is moved about between the left thumb at its lower edge Fig. 10.—Position of fingers in using the speculum. and the index finger in the concha, so that the examiner may observe the different parts of the meatus and the tympanic membrane (Fig. 10). Brunton’s Speculum. This consists of a metallic tube, furnished with a bi-con vex eye-piece at one end and an ear speculum at the other (Pig. 11). Light is admitted through a wide funnel-shaped opening at the side and falls upon a perforated mirror, set at an angle, from which it is reflected into the ear, passing back through the perforation in the mirror to the eye of the observer. By means of Voltolini’s modification the column of air in the external meatus may be condensed and rare- fied as with Siegle’s speculum. This instrument is now but little used, being inferior in simplicity and efficiency to the speculum and mirror. Owing to its magnifying power it may be employed, in practised hands, for showing minute cha nges. Fig. 12.—Siegle’s pneumatic speculum. Siegle’s Pneumatic Speculum (Fig. 12) consists of a vulcanite speculum screwed on to one end of a vulcanite cylinder, closed at the other end by a plate of glass placed obliquely, or, if we wish to magnify the parts, by a convex lens. The side of the cylinder has an](https://iiif.wellcomecollection.org/image/b24932577_0053.jp2/full/800%2C/0/default.jpg)
