Mechanical Ventilation

Question 1

Minute Ventilation

Answer 1

RR x Tidal Volume

4-8 L/min for adults
Pediatrics 4-8 L/min
Infants 0.2-0.3 L/min/kg

Question 2

Frequency

Answer 2

Sum of respiratory rate and any patient triggered breaths

**NOT ONLY RESPIRATORY RATE

Question 3

Tidal Volume

Answer 3

Amount of volume delivered by ventilator

Question 4

Vte

Answer 4

Exhaled Vital Volume
Accurate measurement of the volume of air recieved by the patient. Accounts for deadspace.

Question 5

PIP

Answer 5

Peak Inspiratory Pressure

Measurement of pressure at upper airway. ETT, vent circuit, bronchial tree. Maintain at <35 PIP.

Question 6

DOPE

Answer 6

Displacement
Obstruction
Pneumothorax
Equipment Failure

Question 7

PEEP (Negative)

Answer 7

Negative - Increased intrathoracic pressure, potentially reducing venous return and affecting cardiac output.

Question 8

Assist Control mode

Answer 8

Guarantees minute ventilation
Does not allow for patient respiratory drive.
When patient triggers breath, delivers full set tidal volume.

Question 9

SIMV

Answer 9

Synchronized intermittent mandatory ventilation
Designed to wean patients off ventilator
Patient is allowed to trigger spontaneous breath between mandatory breath.

Question 10

Pressure Support

Answer 10

only during SIMV. Reduces patient breathing effort.

Question 11

Airway Resistance Equation

Answer 11

PIP - Pplat / Flow (lps) >10 is significant

Question 12

Dynamic Compliance

Answer 12

Airway resistance and Alveolar compliance together. Vt / (PIP - PEEP) Normal is 40-100

Question 13

Static Compliance

Answer 13

Alveolar Compliance = Vt / (Pplat - PEEP)