. Essentials of surgery; a textbook of surgery for student and graduate nurses and for those interested in the care of the sick . or drum membrane of the middle ear. Thecanal is lined with cutaneous epithelium and has a peculiarsecretion, wax or cerumen. Lesions include: (1) infection; (2) foreign bodies; (3)collections of wax. 1. Infection is usually a furuncle or skin abscess, andis very painful. It presents the same symptoms and indicationfor treatment as does an abscess elsewhere. 2. Foreign bodies lodged in the canal cause pain, swelling,and interfere with hearing. Removal is often diffic
. Essentials of surgery; a textbook of surgery for student and graduate nurses and for those interested in the care of the sick . or drum membrane of the middle ear. Thecanal is lined with cutaneous epithelium and has a peculiarsecretion, wax or cerumen. Lesions include: (1) infection; (2) foreign bodies; (3)collections of wax. 1. Infection is usually a furuncle or skin abscess, andis very painful. It presents the same symptoms and indicationfor treatment as does an abscess elsewhere. 2. Foreign bodies lodged in the canal cause pain, swelling,and interfere with hearing. Removal is often difficult. The THE HEAD—CRANIUM AND FACE 121 use of probes or forceps is not permissible except in the hands ofexperts, on account of the danger of injury to the canal or drummembrane. The use of a syringe and water is successful inremoving foreign matter, except seeds or vegetable materialswhich swell, in which case oil may be used. 3. Collections of cerumen may accumulate in the canal,forming hard masses, causing ringing in the ears, or is usually accomplished by syringing the ear with astrong piston MASTO/OCAV/TY TENSORTYMPAA// ^L/STAC/y/A/V ,^ TUBE <^ TYMPA/V/C MEMB/?A/VE Fig. 30.—Middle ear, Eustachian tube, and mastoid cells. B. The middle ear (Fig. 30) is separated from the externalcanal by the tympanum, and contains the ossicles, malleus,stapes and incus, which transmit the sound-waves from thedrum membrane to the inner ear, and special endings of theauditory nerve. It is adjacent to the air cells of the mastoidprocess of the temporal bone. It communicates with the phar-ynx through the Eustachian canal, by means of which infectionmay reach the middle ear. This communication explains thefrequent sequence of acute middle-ear disease foHowing infec-tious processes in the throat and tonsils. Surgical lesions include various forms of infectious proc-esses with their extensions to the mastoid cells. These are 122 ESSENTIALS OF SURGERY FOR NURSES se
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