nasogastric intubation. the flexible tube with a rounded end is passed through the nasal cavity to the stomach; the technique requires expert knowledge and care to avoid damage to the nasal conchae and mucosa and to avoid passing medicines or feed into the lungs.he flexible tube with a rounded end is passed through the nasal cavity to the stomach; the technique requires expert knowledge and care to avoid damage to the nasal conchae and mucosa and to avoid passing medicines or feed into the lungs.
â¢ ISM (noun). The noun ISM has 1 sense: 1. a belief (or system of beliefs) accepted as authoritative by some group or school. Familiarity information: ISM used as a noun is very rare.irondism (the doctrine of the Girondists). functionalism (any doctrine that stresses utility or purpose). formalism (the doctrine that formal structure rather than content is what should be represented). expansionism (the doctrine of expanding the territory or the economic influence of a country).
What does ppm mean? This is an abbreviation for parts per million and it also can be expressed as milligrams per liter (mg/L). This measurement is the mass of a chemical or contaminate per unit volume of water. Seeing ppm or mg/L on a lab report means the same thing. One ppm is equivalent to the absolute fractional amount multiplied by one million. A better way to think of ppm is to visualize putting four drops of ink in a 55-gallon barrel of water and mixing it thoroughly.