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–Describe SIMV , IMV
– Understand SIMV characteristics
– Be able to describe Synchronizatio Window
– List Indications of SIMV
– List advantages of SIMV
– List disvantages of SIMV
• Ventilator delivers the preset parameters.
• Patient can take spontaneous breaths in between.
• Spontaneous breaths are NOT synchronized with mandatory breaths leading to breath stacking.
• Ventilator delivers the preset parameters.
• Patient can take spontaneous breaths in between.
• Spontaneous breaths are synchronized with mandatory breaths to prevent breath stacking.
To provide partial ventilatory support and allow the patient to spontaneously patriciate in breathing
1-Maintain respiratory muscle strength.
2-Facilitate weaning.
3-Synchronization of Spontaneous and Mandatory Breath.
4-Spontaneous breath may be PS .
1- Increase WOB
2-Possible tachypnea with fatigue and hypercapneia
3-Stuides suggest that SIMV weaning assoicatied with poorest outcoms (longer weaning times )