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  • Inspiratory hold

    A ventilating maneuver in which the delivered volume of gas is held in the lung for a while before expiration; called a plateau or ledge at end inspiration. Also called grunt breathing.  

  • Inspiratory capacity

    The maximum amount of air a person can breathe in after a resting expiration. The amount of air that can be inhaled into the lungs at maximum capacity after a regular exhalation.  

  • Sustained maximal inspiration

    A deep-breathing maneuver that mimics the normal physiological sigh mechanism. The patient inspires from a resting expiratory level up to maximum inspiratory capacity, with a pause at end inspiration.  

  • Full inspiration

    Inspiration in which the lungs are filled as completely as possible (voluntarily, as in determining the vital capacity, or involuntarily, as in cardiac dyspnea).  

  • Inspiration inspiration

    Inspiration in which the muscles of inspiration are assisted by accessory muscles of respiration, such as the sternocleidomastoids, intercostals, and serratus posterior. Forced inspiration is normal during vigorous exercise, but indicative of hypoxia, hypercarbia, or acidosis when it occurs at rest.  

  • Insorption

    The passage of material into the blood, as when substances move from the gastrointestinal tract into the bloodstream.    

  • Fatal familial insomnia

    An inherited, rapidly progressive prion disease of middle or later life. Signs and symptoms include intractable insomnia, autonomic dysfunction, endocrine disturbances, dysarthria, myoclonus, coma, and death. There is no specific therapy.    

  • Altitude insomnia

    A form of altitude sickness in which insomnia results from inadequate environmental oxygen. It occurs commonly in mountaineers and to a lesser extent in aviators. It is often accompanied by appetite disturbances, fatigue, headaches, and shortness of breath.  

  • In silico

    The mimicking or modeling of biological processes within computer hardware and software.  

  • Velamentous insertion

    The attachment of the umbilical cord to the edge of the placenta.  

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