Mech vent basic modes

Question 1

A/C

Answer 1

• Assist/ control
• Minimum number of preset breaths are delivered to the vent but the patient can trigger additional breahts
• often used when mechanical ventilation is intiated
• CMV is the same

Question 2

CMV

Answer 2

• continous mandatory ventilation
• same as A/C

Question 3

SIMV

Answer 3

• synchronous intermittent mandatory ventilation
• Minimum number of breaths is set. Pt is allowed to initiate spontaneous breaths in-between the mandatory breaths
• Partital ventilatory support
• Used for weaning
• Distributes Vt evenly throughout lung fields reduces V/Q mismatching
• Helps decrease pt mean airway pressure

Question 4

CSV

Answer 4

• Continous spontaneous ventilation
• All breaths are spontaneous by the patient

Question 5

PCV

Answer 5

• Pressure control ventilation
• Pressure is the independent variable
• Inspiratory pressure is the set value

Question 6

CPAP

Answer 6

• Pt must be spontaneously breathing b/c no mandatory breaths are given
• Pressure above atmospheric is maintained

Question 7

IMV

Answer 7

• INTERMITTENT MANDATORY VENTILATION
• Mandatory breaths are delivered only when the measured minute ventilation drops below a preset threshold
• Mandatory breath frequency can never be higher than the set rate

Question 8

PSV

Answer 8

• Pressure support ventilation
• The patients spontaneous breath is supported by the ventilator during the inspiratory phase. Once the pt triggers the breath the vent adds pressure to make breathing easier
• The pressure level is set by the operator
• can be used to help the patient over come the airway resistance that is caused by the ETT
• higher the set pressure the easier for the patient to take a breath
• Time cycled and pressure limited