CVPR 322 Physiologic Assesment / Intructor Ed Flashcards Preview

Perfusion Program Fall 2014 > CVPR 322 Physiologic Assesment / Intructor Ed > Flashcards

Flashcards in CVPR 322 Physiologic Assesment / Intructor Ed Deck (21)
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1

PaCO2

partial pressure of carbon dioxide dissolved in the plasma.
35 - 45 mmHg

2

pH normal range

7.35 - 7.45

3

PaO2

partial pressure of oxygen
dissolved in the plasma only
90 - 100 mmHg

4

HCO3

Bicarbonate buffer

22 - 26

5

BE

Base excess
(-2) --- (+2)

6

SaO2

oxygen is bound to hemoglobin
> 95 %

7

Significant deviations from normal pH ranges are _____ _____ and may be life threatening
Achieved by _____ and _____ systems

Poorly tolerated



Respiratory
Renal

8

What are the two buffers that work in pairs ?

Carbonic acid
&
Base bicarbonate

9

H2CO3

Carbonic Acid

10

NaHCO3

Base bicarbonate

11

What buffer is linked to the RESPIRATORY compensatory mechanism ?

Carbonic Acid
H2CO3

12

What buffer is linked to the RENAL compensatory mechanism ? "metabolic component"

base bicarbonate
NaHCO3

13

98% normal metabolites are in the form of ?

CO2

14

Process of kidneys excreting H+ into the urine and reabsorbing HCO3- into the blood from the renal tubules

1) active exchange; Na+ for H+ between the tubular cells and glomerular filtrate
2) carbonic anhydrase is an enzyme that accelerates hydration/dehydration CO2 in renal epithelial cells

15

accelerates hydration/dehydration CO2 in renal epithelial cells

carbonic anhydrase

16

Acidosis

pH < 7.35
PCO2 > 45
HCO3 < 22

17

Alkalosis

pH > 7.45
PCO2 < 35
HCO3 > 26

18

CO2 + H2CO3 =

Drop in pH

19

5 Causes of Respiratory Acidosis non-CPB related?

- emphysema
- OD
- narcosis
- respiratory arrest
- airway obstruction

20

pH < 7.35
HCO3 < 22

Metabolic Acidosis

21

Causes of Metabolic Acidosis

- renal failure
- DKA
- lactic acidosis
- excessive diarrhea
- cardiac arrest