JOHN WESt

Question 1

FRC

Answer 1

functional residual capacity

Question 2

Max inhalation

Answer 2

Total lung capacity

Question 3

Max inhalation + Max exhalation

Answer 3

Vital capacity

Question 4

Inhalation + exhalation

Answer 4

tidal volume

Question 5

baseline of 0 + exhalation baseline

Answer 5

functional residual capacity

Question 6

baseline of 0 + max exhalation baseline

Answer 6

residual volume

Question 7

FRC by Helium dilution equation

Answer 7

C1 x V1 = C2 (V1+ FRC)

Question 8

FRC by Plethysmograph

Answer 8

Box:
P1V1 = P2(V1 - delta V)

Lung:
P3 FRC = P4 (FRC + delta V)

Question 9

Boyle’s law

Answer 9

Pressure x volume is a constant at constant temp

Question 10

Lung disease can give a lower volume when using helium dilution.

Question 11

Tidal vol x RR = Total vent

Question 12

Dead space (150ml) x RR = Total dead space / min

Question 13

Alveolar Vent = Total Vent - Total dead space

Question 14

V (CO2) = alveolar vent x (%CO2/100)

Question 15

P(CO2) = FCO2 x K

Answer 15

P(CO2) = part pressure
FCO2 = Fractionated co2
K = constant

Question 16

Alveolar vent = (V(CO2) / P(CO2)) x K

Question 17

alveolar Vent and PCO2 are inversely proportional

Answer 17

dbl alveolar vent = half PCO2

Half Alveolar vent = dbl PCO2

Question 18

CSA increases as we get lower into the alveolar

Question 19

ratio of ventilation to blood flow

Answer 19

1

Question 20

concentration of dry air and partial pressure

Answer 20

FO2 = 0.21 (21%)
Baro Pressure = 760 mmHg

PO2 = 0.21 x 760
= 160 mmHg

Question 21

Effect of water vapor and partial pressure

Answer 21

Baro Pressure 760 mmHg
37C = Ph2o = 47 mmHg
Pdry = 760 - 47 = 713mmHg

PO2 = 0.21 x 713
= 150 mmHg

Question 22

If water vapor is 100C

Answer 22

Water vapor
PO2 = 760 mmHg

temp when water boils

Question 23

partial pressure of air in water

Answer 23

150 mmHg

Question 24

air O2 = 21ml/dl
water O2 = .45 ml/dl

Answer 24

solubility of o2 in h20
= 0.45 x 150 mmHg
= 0.003 ml/dl/mmHg

Question 25

solubility = 0.003 ml/dl/mmHg
PO2 art = 100mmHg

Answer 25

0.003 x 100 mmHg
= 0.3ml/dl = 3ml/L (O2)

CO = 30L/min
Max O2 avail = 90ml/min
O2 req = 3000ml/min

Question 26

HGB dissociation curve

Answer 26

Art Blood 100 PO2,mmHG / 100 O2 sat

Venous blood 40 PO2 mmHg / 75 O2 sat

P50 27 PO2 mmHg / 50 O2 sat

Question 27

Total O2 concentration of arterial blood

Answer 27

1.39 ml/o2 / 1g hgb / %sat/100 + 0.003 x po2

ex
1.39 x 15 x .97 + 0.003 (100)
= 20.5 ml/dl

Question 28

What shifts the O2 curve to the right?

Answer 28

increase in
CO2, H+, 2,3 DPG, Temp.

Question 29

How much more affinity of O2 is CO (carbon monoxide)?

Answer 29

140x

Question 30

What are the 3 forms of CO2 in the blood?

Answer 30

dissolved
bicarb
carbamino compounds

Question 31

solubility of o2 in blood

solubility of CO2 in blood

Answer 31

0.003 ml/dl

0.067 ml/dl (24x more)