Myringotomy children, while local anesthesia suffices for adults. The ear is washed and a small incision made in the eardrum. Any fluid that is present is then aspirated, the tube of choice inserted, and the ear packed with cotton to control any slight bleeding that might occur. This is known as conventional (or "cold knife") myringotomy and usually heals in one to two days. A new variation (called "tympanolaserostomy" or "laser-assisted tympanostomy") uses CO laser, and is performed with a computer-driven laser and a video monitor to pinpoint a precise location for the hole. The laser takes one tenth of a
River incision and diverse ecosystems on the planet and are for this reason the focus of many restoration projects throughout the United States. At low erosion rates increased stream incision may make gentle slopes to erode creating convex-up forms. Convex slopes around a stream can thus indirectly reflect accelerated crustal uplift. This is because accelerated incision may trigger accelerated erosion on the adjacent slopes creating slopes progressively steeper slopes that are in equilibrium with high erosion rates. River incision River incision is the narrow erosion caused by a river or stream that is far from its base level. River incision is common