| ISTU | isometric strength testing unit |
|---|---|
| LIS | laboratory information system; lateral intercellular space; left intercostal space; library informat... |
| LISS | low-ionic-strength saline |
| LS | lateral suspensor; left sacrum; left septum; left side; legally separated; leiomyosarcoma; length of... |
| mm | st muscle strength |
| ideal alveolar gas | The uniform composition of gas that would exist in all alveoli for a given total respiratory exchange if all alveoli had identical ventilation-perfusion ratios and achieved perfect equilibrium with the blood leaving the pulmonary capillaries. (05 Mar 2000) |
|---|---|
| inert gas narcosis | Progressive mental disturbances and unconsciousness due to breathing mixtures of oxygen and inert gases (argon, helium, xenon, krypton, and atmospheric nitrogen) at high pressure. (12 Dec 1998) |
| inspired gas | Any gas that is being inhaled; specifically, that gas after it has been humidified at body temperature. (05 Mar 2000) |
| intestinal gas | The complaint referred to as intestinal gas is a common one and the discomfort can be quite significant. Everyone has gas and eliminates it by burping or passing it through the rectum. In many instances people think they have too much gas when in reality they have normal amounts. most people produce 1 to 3 pints of intestinal gas in 24 hours and pass gas an average of 14 times a day. It is made up primarily of odourless vapors such as carbon dioxide, oxygen, nitrogen, hydrogen, and in some families, methane. The unpleasant odour is due to bacteria in the large intestine that release small amounts of gases containing sulfur. (12 Dec 1998) |
| intramural bowel gas | <radiology> Pneumatosis cystoides intestinalis, necrotizing enterocolitis (NEC) - infants, mesenteric vascular thrombosis, necrosis due to strangulated obstruction, toxic ulcerative colitis, ulceration proximal to obstructing carcinoma, post-surgical changes (12 Dec 1998) |
| tear gas | A gas, such as acetone, benzene bromide, and xylol, that causes irritation of the conjunctiva and profuse lacrimation. See: lacrimator. (05 Mar 2000) |
| tetanus and gas gangrene antitoxins | A mixture of antibodies obtained from animals immunised against the toxins of Clostridium tetani, C. Perfringens, and C. Septicum. (05 Mar 2000) |
| expired gas | Any gas that has been expired from the lungs; often used synonymously with mixed expired gas. (05 Mar 2000) |
| universal gas constant | <radiobiology> R = 8.314 x 10^7 ergs per degree C per mole. (09 Oct 1997) |
| landfill gas | Gas that is generated by decomposition of organic material at landfill disposal sites. Landfill gas is approximately 50 percent methane. (05 Dec 1998) |
| laughing gas | A historical term for nitrous oxide. Origin: so called because its inhalation sometimes excites a hilarious delirium preceding insensibility (05 Mar 2000) |
| lorentz gas | <radiobiology> Plasma model in which the electrons are assumed not to interact with each other, but only with ions (Z to infinity) and where the ions are assumed to remain at rest/fixed (M-i to infinity). Synonym: electron gas. (13 Jan 1998) |