Long-term ventilating tube with tympanosclerosis.The otoscopic view is that of a left ear with a green Silastic Silastic /Si·las·tic/ (si-las´tik) trademark for polymeric silicone substances that have the properties of rubber but are biologically inert; used in surgical prostheses. ventilating ventilating Natural or mechanically induced movement of fresh air into or through an enclosed space. The hazards of poor ventilation were not clearly understood until the early 20th century. Expired air may be laden with odors, heat, gases, or dust. tube. This view illustrates a problem that can occur with long tubes. The end of the tube is touching the anterior canal wall, where it can cause irritation, discomfort, and sometimes obstruction. It is sometimes necessary to cut off the end of a tube to prevent if from touching the ear canal ear canal n. The narrow, tubelike passage through which sound enters the ear. Also called external auditory canal. . Small patches of tympanosclerosis of a cosmetic type can be seen anterior to the malleus malleus /mal·le·us/ (mal´e-us) [L.] the outermost of the auditory ossicles, and the one attached to the tympanic membrane; its club-shaped head articulates with the incus mal·le·us n. pl. and in the posterior half of the tympanic membrane. A crust has formed around the tube near the pars tensa; this is not uncommon when tubes are in place for long periods of time. Use of a long-term ventilating myringostomy tube is often necessary in patients who have persistent serous otitis media in association with a cleft palate. From the Pulec Ear Clinic, Los Angeles (Dr. Pulec), and Gap, France (Dr. Deguine). |
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