Intermittent Mandatory Ventilation
Intermittent mandatory ventilation (IMV) provides a fixed rate of mechanical ventilation, determined by the clinician, and allows spontaneous breathing between mechanical breaths.
This mode may be utilized in the acute care phase (high rates) or the weaning phase (low rates).
Mandatory breaths occur at fixed intervals determined by the preset breath rate (BR). Total cycle time is the BR (bpm) divided by 60 s/min.
With pressure targeting, the mandatory tidal volume (VT) is determined by the preset pressure limit (PL), flow, and inspiratory time (TI), as well as the patient’s compliance (CL) and airway resistance (RAW).
VT may not be stable breath to breath, particularly if the patient is breathing asynchronously with the ventilator.
The patient may breath spontaneously between mandatory breaths from a flow of gas, with a preset oxygen fraction (FiO2), provided from the ventilator (continuous and/or demand...
KeywordsAirway Pressure Inspiratory Pressure Peep Level Inspiratory Phase Intermittent Mandatory Ventilation
- Aloan CA, Hill TV. Respiratory care of the newborn. 2nd ed. Philadelphia, PA: Lippincott; 1997.Google Scholar
- Chatburn RL. Fundamentals of mechanical ventilation. A short course in the theory and application of mechanical ventilators. Cleveland Heights, OH: Mandu; 2003.Google Scholar
- Donn SM, editor. Neonatal and pediatric pulmonary graphics: principles and clinical applications. Armonk, NY: Futura; 1998.Google Scholar
- Donn SM, Sinha SK. Assisted ventilation and its complications. In: Martin RJ, Fanaroff AA, Walsh MC, editors. Neonatal–perinatal medicine: diseases of the fetus and infant. 8th ed. St. Louis: Elsevier/Mosby; 2011. p. 1116–40.Google Scholar
- Goldsmith JP, Karatokin EH, editors. Assisted ventilation of the neonate. 5th ed. Philadelphia, PA: Saunders; 2009.Google Scholar
- Koff PB, Eitzman D, Neu J. Neonatal and pediatric respiratory care. St. Louis: Mosby; 1993.Google Scholar
- Whitaker KB. Comprehensive perinatal and pediatric respiratory care. 3rd ed. Albany, NY: Delmar; 2001.Google Scholar