Myringoplasty perforation and a small part should also extend over the posterior canal wall. The tympanomeatal flap is then replaced. The temporal fascia is harvested. An incision is made to raise medial meatal skin with tympanic membrane epithelium. The graft is placed on the outer surface of the tympanic membrane and a slit is made to tuck it under the handle of malleus. The ear is packed with gelfoam and antibiotics, and the incision is closed. Finally mastoid dressing is performed. Myringoplasty Myringoplasty is the closure of the perforation of pars tensa of the tympanic membrane. When myringoplasty is combined with
Cell membrane concentration in order to equilibrate the membrane. It is considered a passive transport process because it does not require energy and is propelled by the concentration gradient created by each side of the membrane. Such a concentration gradient across a semipermeable membrane sets up an osmotic flow for the water. Osmosis, in biological systems involves a solvent, moving through a semipermeable membrane similarly to passive diffusion as the solvent still moves with the concentration gradient and requires no energy. While water is the most common solvent in cell, it can also be other liquids as well as supercritical liquids and