Respiratory ventilation, volumes and capacities Flashcards Preview

A - Board Reveiew Misc > Respiratory ventilation, volumes and capacities > Flashcards

Flashcards in Respiratory ventilation, volumes and capacities Deck (14)
1

Inspiratory reserve volume

IRV is air that is inhaled after tidal volume.

2

What is tidal volume?

Air that moves into lungs with normal respiration
Normally 500 mL

3

What is expiratory reserve volume?

ERV
Air that can be breathed out AFTER a normal expiration

4

What is Residual volume?

Air that is still in the lung after maximal expiration.
CANNOT BE MEASURED by spirometry.

5

What is inspiratory capactity?

Inspiratory reserve volume + Tidal Volume

6

What is functional residual capacity?

RV + ERV (expiratory reserve volume)
Volume of gas in lungs after a normal expiration

7

What is vital capacity?

TV + IRV + ERV
Maximum volume of gas that can be expired after a maximal inspiration.

8

What is total lung capacity?

IRV + TV + ERV + RV
Volume of gas present after maximal inspiration.

9

What is minute ventilation?

tidal volume x respiratory rate gives total volume of gas entering the lungs per minute.

10

At Functional residual capacity (FRC) what are the pressures in the chest?

Airway and alveolar pressures are 0

Intrapleural pressures are negative.

11

What is compliance?

Change in lung volume for a given change in pressure.

Decreased in pulmonary fibrosis, pneumonia, pulmonary edema, and increased in emphysema/normal aging.

12

Describe hemoglobin R vs T forms and O2 affinity

R form has high O2 affinity.

T form has low O2 affinity.

13

Why does fetal hemoglobin have more affinity for O2 than adults?

Fetal hemoglobin has a lower affinity for 2,3 BPG thus leads to more O2 affinity compared to adults.

14

Increased chloride, H+, CO2 and 2,3 BPG and temeprature has what effect on O2 affinity in the RBC?

Leads to favor of the T form leading to decreased O2 affinity.

Decks in A - Board Reveiew Misc Class (64):