Week Three: Mechanical Ventilation

Question 1

What are the four stages of the respiratory cycle?

Answer 1

Inspiratory flow, inspiratory pause, expiratory flow, expiratory pause

Question 2

True or False

Gas exchange does not happen during the pause phase

Answer 2

True

Question 3

Downward movement of the diaphragm creates _____ pressure

Answer 3

Negative

Question 4

A partial pressure of oxygen in the arterial blood of less than 80 mm Hg is…

Answer 4

Hypoxemia

Question 5

A partial pressure of oxygen in arterial blood of less than 60 mm Hg is…

Answer 5

Severe hypoxemia

Question 6

O2 should be greater than ____%

Answer 6

40

Question 7

The act of assisting or controlling patient breathing by the use of a machine driven or hand operated device is called…

Answer 7

Mechanical ventilation

Question 8

What ‘drives’ mechanical ventilation according to our notes?

Answer 8

Positive pressure in the lungs

Question 9

When should you ventilate for your patient?

Answer 9

If your patient does not have the muscular ability and control to breathe effectively and efficiently

Question 10

What is the best indicator of oxygen therapy effectiveness?

Answer 10

Arterial blood gases

Question 11

What are the ‘normal’ values for pH, PaCO2, partial pressure of oxygen in arterial blood PaO2, and bicarbonate HCO3 according to our week three notes?

Answer 11

pH: 7.35-7.45, partial pressure PaCO2: 35-45 mm Hg, Partial pressure PaO2: 94-100 mm Hg, Bicarbonate HCO3: 22-26 mEq/L

Question 12

Tubes going into the airway for ventilation should be made of _____ or _____

Answer 12

Silicone or silastic

Question 13

What is controlled ventilation?

Answer 13

The total control of all ventilator activity