inverse ratio ventilation
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Related to inverse ratio ventilation: APRV
in·verse ra·ti·o ven·ti·la·tion(IRV) (in-vĕrs' rā'shē-ō ven'ti-lā'shŭn)
A mode of mechanical ventilation.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
inverse ratio ventilationAbbreviation: IRV
Mechanical ventilation in which the normal temporal relationship between inspiration and expiration is reversed (the inspiration time is longer than the expiratory time). It is sometimes used in severely hypoxemic patients who have not responded to other ventilatory maneuvers. Because it is uncomfortable for patients, paralysis and sedation are needed.
See also: ventilation
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