Myringotomy secondary to eustachian tube dysfunction. However, the number of patients in the studies cited, 22 and 8 respectively and 18 in the tympanometric study, is extremely small and simply points to the need for large, well-controlled studies. Myringotomy A myringotomy, sometimes called by other names, is a surgical procedure in which a tiny incision is created in the eardrum (tympanic membrane) to relieve pressure caused by excessive buildup of fluid, or to drain pus from the middle ear. A tympanostomy tube is inserted into the eardrum to keep the middle ear aerated for a prolonged time and to prevent reaccumulation
River incision (Jansen 2006), removing this armoring layer of gravel, boulders, etc. exposes the channel bed to the erosive force of the water. “On the Russian River near Healdsburg, California, instream pit mining in the 1950s and 1960s caused channel incision in excess of 3-6 m over an 11-km length of river” (Kondolf et. al. 2002). Tectonics play an important role in shaping landscapes and rivers, and tectonic uplift and river incision go hand in hand. Over geologic time, as mountains rise higher, water erodes deep gorges and channels, dissecting the landscape. In some instances, such as the Sierra Nevada mountains of