- Volume controlled intermittent mandatory ventilation
-
Volume Controlled Intermittent Mandatory Ventilation (VC-IMV) refers to any mode of mechanical ventilation with preset tidal volume (VT) and inspiratory flow. Spontaneous breaths (i.e., inspiration is patient triggered and patient cycled) can exist between mandatory breaths. For intermittent mandatory ventilation utilizing pressure regulation, the term pressure controlled intermittent mandatory ventilation is used.
Contents
Intermittent Mechanical Ventilation
IMV — IMV is similar to AC in two ways: the minute ventilation is determined (by setting the respiratory rate and tidal volume); and the patient is able to increase the minute ventilation. However, IMV differs from AC in the way that the minute ventilation is increased. Specifically, patients increase the minute ventilation by spontaneous breathing, rather than patient-initiated ventilator breaths.
Syncronized Intermittent Mechanical Ventilation
SIMV — SIMV is a variation of IMV, in which the ventilator breaths are synchronized with patient inspiratory effort.[1][2] SIMV with pressure support is the most efficient and effective mode of mechanical ventilation.[3]
Mandatory Minute Ventilation
MMV — Mandatory minute ventilation is a mode which requires the operator to determine what the appropriate minute ventilation for the patient should be, and the ventilator then monitors the patient's ability to generate this volume every 7.5 seconds. If the calculation suggests the volume target will not be met, SIMV breaths are delivered at the targeted volume to achieve the desired minute ventilation[4]. Allows spontaneous breathing with automatic adjustments of mandatory ventilation to the meet the patient’s preset minimum minute volume requirement. If the patient maintains the minute volume settings for VT x f, no mandatory breaths are delivered. If the patient's minute volume is insufficient, mandatory delivery of the preset tidal volume will occur until the minute volume is achieved. The method for monitoring whether or not the patient is meeting the required minute ventilation (VE) is different per ventilator brand and model, but generally there is a window of time being monitored and a smaller window being checked against that larger window (i.e., in the Dräger Evita® line of mechanical ventilators there is a moving 20-second window and every 7 seconds the current tidal volume and rate are measured against to make a decision for if a mechanical breath is needed to maintain the minute ventilation). MMV is the most optimal mode for weaning in neonatal and pediatric populations and has been shown to reduce long term complications related to mechanical ventilation.[5]
See also
- Modes of mechanical ventilation
- Volume Controlled Continuous Mandatory Ventilation
- Volume Controlled Intermittent Mandatory Ventilation
- Pressure Controlled Continuous Mandatory Ventilation
- Pressure Controlled Intermittent Mandatory Ventilation
- Continuous Spontaneous Ventilation
References
- ^ Sassoon CS, Del Rosario N, Fei R, et al. Influence of pressure- and flow-triggered synchronous intermittent mandatory ventilation on inspiratory muscle work. Crit Care Med 1994; 22:1933.
- ^ Christopher KL, Neff TA, Bowman JL, et al. Demand and continuous flow intermittent mandatory ventilation systems. Chest 1985; 87:625.
- ^ D. C. Shelledy, J. L. Rau & L. Thomas-Goodfellow (January–February 1995). "A comparison of the effects of assist-control, SIMV, and SIMV with pressure support on ventilation, oxygen consumption, and ventilatory equivalent". Heart & lung : the journal of critical care 24 (1): 67–75. PMID 7706102.
- ^ Scott O. Guthrie, Chris Lynn, Bonnie J. Lafleur, Steven M. Donn & William F. Walsh (October 2005). "A crossover analysis of mandatory minute ventilation compared to synchronized intermittent mandatory ventilation in neonates". Journal of perinatology : official journal of the California Perinatal Association 25 (10): 643–646. doi:10.1038/sj.jp.7211371. PMID 16079905.
- ^ Scott O. Guthrie, Chris Lynn, Bonnie J. Lafleur, Steven M. Donn & William F. Walsh (October 2005). "A crossover analysis of mandatory minute ventilation compared to synchronized intermittent mandatory ventilation in neonates". Journal of perinatology : official journal of the California Perinatal Association 25 (10): 643–646. doi:10.1038/sj.jp.7211371. PMID 16079905.
Mechanical ventilation Fundamentals Modes of mechanical ventilation • Mechanical ventilation in emergencies • Mechanical ventilation in neonates • Nomenclature of mechanical ventilationModes Volume controlled continuous mandatory ventilation • Volume controlled intermittent mandatory ventilation • Pressure controlled continuous mandatory ventilation • Pressure controlled intermittent mandatory ventilation • Continuous spontaneous ventilation • High-frequency ventilation (passive) • High-frequency ventilation (active)Related illness ARDS • Pulmonary barotrauma • Pulmonary volutrauma • Ventilator-associated pneumonia • Oxygen toxicity • Ventilator-associated lung injurySettings Ventilation
Wikimedia Foundation. 2010.
Look at other dictionaries:
Volume controlled continuous mandatory ventilation — (VC CMV) is a mode of mechanical ventilation where breaths are delivered based on set variables. The patient may initate breaths by attempting to breathe. Once a breath is initated, either by the patient or by the ventilator the set tidal volume… … Wikipedia
Pressure controlled intermittent mandatory ventilation — (PC IMV) is any mode of mechanical ventilation with preset inspiratory pressure (Pressure Control) and inspiratory time (Ti). Spontaneous breaths (i.e., inspiration is patient triggered and patient cycled) can exist between mandatory breaths… … Wikipedia
Mechanical ventilation — In architecture and climate control, mechanical or forced ventilation is the use of powered equipment, e.g. fans and blowers, to move air see ventilation (architecture). Mechanical ventilation Intervention … Wikipedia
Modes of mechanical ventilation — Contents 1 Positive and negative pressure ventilation 1.1 Negative pressure ventilation 1.1.1 Types of negat … Wikipedia
Nomenclature of mechanical ventilation — Contents 1 Volume Controlled Continuous Mandatory Ventilation 1.1 Terms replaced by VC CMV 2 … Wikipedia
Continuous spontaneous ventilation — Uses Gives assisting pressure and flow during inhalation. Trigger Flow, Volume or Pressure Limit Pressure Inspiratory Cycle Flow Servo no Settings … Wikipedia
Ventilation — The exchange of air between the lungs and the atmosphere so that oxygen can be exchanged for carbon dioxide in the alveoli (the tiny air sacs in the lungs). In pulmonary medicine, a distinction is made between pulmonary and alveolar ventilation.… … Medical dictionary
Neurally adjusted ventilatory assist — NAVA Neurally Adjusted Ventilatory Assist is a mode of mechanical ventilation. NAVA delivers assist in proportion to and in synchrony with the patient s respiratory efforts, as reflected by the Edi signal. This signal represents the electrical… … Wikipedia
Искусственное дыхание — Эту статью следует викифицировать. Пожалуйста, оформите её согласно правилам оформления статей. Искусственное дыхание (искусственная вентиляция легких, ИВЛ) комплекс мер, направленных на поддержание оборота в … Википедия
Beatmung — dient der Unterstützung oder dem Ersatz unzureichender oder nicht vorhandener Spontanatmung. Ihre lebenserhaltende Funktion ist zentraler Bestandteil in der Anästhesiologie, der Notfallmedizin und der Intensivmedizin. Es wird unterschieden… … Deutsch Wikipedia