Ch. 4 Blood Gas

Question 1

every decrease in 7 C= ? metabolic

Answer 1

decrease 50%

Question 2

cold temperatures = ? solubility

Answer 2

increase solubility into solution

Question 3

Celcius =

Answer 3

C= (F -32) x 5/9

Question 4

Farenheit =

Answer 4

F= (C x 9/5) +32

Question 5

Hemoglobin-O2 Dissociation Curve Shifts (LvsR)

Answer 5

Left Shift= higher affinity (lungs)
Right Shift= lower affinity (O2 transfer in tissue)
   - high CO2, low pH
   - high temp
   - high 2,3 DPG

Question 6

What is P50

Answer 6

P50 is the PO2 that gives you 50% hemoglobin saturation

• normal is 27 mmHg
• high P50= low affinity
• low P50= high affinity

Question 7

1 gram fully saturated Hgb= ? ml O2

Answer 7

1.34 ml O2

Question 8

O2 Capacity

Answer 8

= 1.34 x Hgb + (.003 x pO2)

Question 9

O2 Content

Answer 9

= 1.34 x (Hgb x decimal saturation) + (.003 x pO2)

Question 10

O2 Saturation

Answer 10

= O2 content/O2 capacity

Question 11

O2 Consumption

Answer 11

= (aO2 - vO2 content) x L/min x 10

Question 12

O2 Transfer

Answer 12

= [(A-V decimal sat) x 1.34 x Hgb x ml/min] / 100

Question 13

pCO2 increase by 20 mmHg= what to pH

- decrease by 10 mmHg= what to pH

Answer 13

• drop .1 pH

- increase .1 pH

Question 14

Respiratory Quotient

Answer 14

CO2 produced / O2 consumed

4:5

Question 15

3 ways CO2 is transported

Answer 15

7% dissolved
23% Hgb
70% bicarb (CO2+H2O= H2CO3= H + HCO3-)
— chloride shift!= Cl-into cell, HCO3 out

Question 16

Bohr vs Haldane

Answer 16

Bohr= change in CO2 on O2 and Hgb
Haldane= change in O2 on CO2 and Hgb

Question 17

What is a buffer and 4 in the body

Answer 17

• weak acid

- bicarb, Hgb, phos, protein

Question 18

Daltons Law

Answer 18

total pressures= to the sum of each gas partial pressure