Category: I

  • Isthmitis

    An inflammation of the throat or fauces.  

  • Isthmectomy

    Excision of an enlarged isthmus, especially of the thyroid gland.    

  • Isotope cisternography

    The use of a radioactive tracer to investigate the circulation of cerebrospinal fluid. A tracer such as ¹³¹I serum albumin is injected in the lumbar subarachnoid space. Flow of the tracer toward the head and into areas of the brain can be recorded by means of serial scintillation scanning. This technique is useful in studying…

  • Isotonia

    The state of equal osmotic pressure of two or more solutions or substances.  

  • Isotone

    One of several nuclides with the same number of neutrons but a different number of protons.  

  • Isothermognosis

    Abnormal perception in which pain, heat, and cold are all felt as heat.  

  • Isothermic saturation boundary

    The location in the airways where inhaled gases become as warm as body temperature and maximally humidified for that temperature. In a healthy person the ISB typically occurs about 5 to 6 cm below the carina.  

  • Isotherapy

    The treatment of an organ disease by consuming the healthy organ of an animal.  

  • Isostimulation

    Stimulation of an animal by the use of antigenic material derived from another animal of the same species.  

  • Isospore

    A nonsexual spore from plants with only one kind of spore. It grows to maturity without conjugating.