Pulmonary: Ventilation

Question 1

Optimal Respiration

Answer 1

• Occurs when ventilation and perfusion are matched

Question 2

Dead Space

Answer 2

• Space that is well ventilated but no gas change takes place

Question 3

Dead Space: Anatomical

Answer 3

• Conducting airways

Question 4

Dead Space: Physiological

Answer 4

• Diseases such as Pulmonary Emboli

Question 5

Shunt

Answer 5

• Complete atelectasis of a respiratory unit allows blood to travel through with no gas diffusion

Question 6

Effects of Body Position on Ventilation and Perfusion: Upright

Answer 6

• More pulmonary blood in the base of the lungs

Question 7

Effects of Body Position on Ventilation and Perfusion: Upright: Static Point

Answer 7

• At the static point of REEP the apical alveoli are fuller than those at the base

Question 8

Effects of Body Position on Ventilation and Perfusion: Upright: Dynamic Phase

Answer 8

• More air to less filled alveoli at the bases

- Causes a greater change in minute ventilation at the bases

Question 9

Effects of Body Position on Ventilation and Perfusion: Upright: Ventilation/Perfusion Ratio

Answer 9

• The ratio of pulmonary alveolar ventilation to pulmonary capillary perfusion

Question 10

Effects of Body Position on Ventilation and Perfusion: Upright: Ventilation/Perfusion Ratio: Apices

Answer 10

• Apices are least effected by gravity with the lowest perfusion
• High V/Q ratio due to more air than blood

Question 11

Effects of Body Position on Ventilation and Perfusion: Upright: Middle lobes

Answer 11

• Perfusion/ventilation are evenly matched

Question 12

Effects of Body Position on Ventilation and Perfusion: Upright: Base

Answer 12

• Highest perfusion

- Low V/Q due to more blood than air

Question 13

Effects of Body Position on Ventilation and Perfusion: Gravity independent zone regardless of position

Answer 13

• Acts as dead space

Question 14

Effects of Body Position on Ventilation and Perfusion: Gravity dependent zone regardless of position

Answer 14

• Acts as shunt