basic understanding of ventilators
- related: ICU intensive care unit, Pulmonology
- tags: #permanent
- source: Murray and Nadel Ch 135 Mechanical Ventilation, design features of modern mechanical ventilators
Ventilator things
- ATC is automatic tube compensation.: adjust pressure/flow based on ET tube diameter.
- flow vs pressure limits
Parameters of ventilation
Modes of ventilation
- basic modes of ventilators
- assist control ventilations are modern CMV ventilators
- NAVA senses phrenic nerve for ventilation
Dysynchrony
- premature cycling is caused by high trigger sensitivity or low inspiratory time
- delayed cycling caused by low trigger and high inspiratory time
- changing ventilation target from flow to pressure can help with flow starvation
- reverse triggering is when patient initiates 2nd breath
- double triggering is when patient initiates 1st breath
Resistance = Peak P - PEEP
Increase flow rate decreases resistance (may not see on pressure curve anymore)
Normal compliance = 80-100 cc/cmH2O
Resistance = (dynamic - static pressure) / flow rate
Rc = Ppeak - Ppleateau cmH2O / flow L/S
Normal = < 2 cm H2O/L/sec for no intubated patient and < 10 for intubated patient
Go up on flow rate to 60L/min to start out
Increase Ti for double trigger.
Links to this note
- ICU intensive care unit
- triggers, targets, cycles of ventilators
- premature cycling is caused by high trigger sensitivity or low inspiratory time
- related: basic understanding of ventilators
- basic modes of ventilators
- related: basic understanding of ventilators
- assist control ventilations are modern CMV ventilators
- related: basic understanding of ventilators
- delayed cycling caused by low trigger and high inspiratory time
- flow vs pressure limits
- related: basic understanding of ventilators
- static and dynamic compliance
- related: basic understanding of ventilators
- stress index in ventilators
- related: basic understanding of ventilators