Myringotomy 1886. The vinyl tube used today was introduced by Beverley Armstrong in 1954. There are numerous indications for tympanostomy in the pediatric age group, the most frequent including chronic otitis media with effusion (OME) which is unresponsive to antibiotics, and recurrent otitis media. Adult indications differ somewhat and include Eustachian tube dysfunction with recurrent signs and symptoms, including fluctuating hearing loss, vertigo, tinnitus, and a severe retraction pocket in the tympanic membrane. Recurrent episodes of barotrauma, especially with flying, diving, or hyperbaric chamber treatment, may merit consideration. Myringotomy is usually performed as an outpatient procedure. General anesthesia is preferred in
Composition of the human body mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium. All 11 are necessary for life. The remaining elements are trace elements, of which more than a dozen are thought on the basis of good evidence to be necessary for life. All of the mass of the trace elements put together (less than 10 grams for a human body) do not add up to the body mass of magnesium, the least common of the 11 non-trace elements.