\ˈɒste͡ɪtˌiz], \ˈɒsteɪtˌiz], \ˈɒ_s_t_eɪ_t_ˌi_z]\
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By Princeton University
By DataStellar Co., Ltd
By Robley Dunglison
Inflammation of bone; inflammation affecting the ossein of the Haversian spaces and canaliculi and their offshoots, and usually the medullary cavity as well ( Osteo-myelitis). It is caused by injury, fevers, or constitutional diseases (rheumatism, syphilis, tuberculosis), or may be spontaneous. The earthy constituents of the bones may either be absorbed so that the bone becomes more porous (Rarefying o. also called dry caries, or, because of the deformity that it produces, Deforming o.); or the earthy salts may be deposited in excess, making it hard and ivory-like (Condensing, Sclerosing, Formative o., eburnation). O. albuminosa, o. marked by the accumulation of a tenacious albuminous liquid. In situation, o. (or osteo-myelitis) may be subperiosteal (Cortical o., periostitis) or formed about the medullary cavity (Central o., endosteitis). Secondary hyper-plastic o., hypertrophic pulmonary osteo-arthropathy ( see Osteo-arthropathy). The SYMPTOMS OF O. are tenderness and dull aching pain increased at night and in damp weather, and irregular enlargement of the bone. In Acute o. (osteo-myelitis), which is usually a septic disease (caused by various bacteria, especially the Staphylococcus pyogenes aureus), there are chills, fever, and systemic depression, with suppuration from the medullary cavity, the extension of inflammation to the surrounding parts, and the formation of secondary pyaemic abscesses. In Chronic o. particularly when due to tuberculosis, the bone may break down, forming cavities (so called\" abscesses of bone,\" central caries) filled with a liquid resembling pus (see Caries). TREATMENT OF O. : incision and trephining to relieve tension and secure drainage; removal of diseased tissue; irrigation with antiseptic solutions; amputation in acute osteo-myelitis when the disease cannot otherwise be checked; supporting measures.
By Alexander Duane
Word of the day
- Any point circumscribed area, irritation of which will give rise to functional action or disturbance elsewhere.