Arterial Blood Gases and Acid-Base Regulation - Group Teaching

Question 1

What is the normal range of arterial blood pH?

Answer 1

7.35 - 7.45

Question 2

What is the normal range of arterial blood P_aCO₂?

Answer 2

4.7kPa - 6.4kPa

Question 3

What is the normal range of arterial blood BE?

Answer 3

-2 - 2

Question 4

What is the normal range of arterial blood P_aO₂?

Answer 4

10kPa - 13.5kPa

Question 5

Using Sørensen’s equation calculate the change in [H⁺] between arterial blood and venous blood. What is it as a percentage?

pH=-log₁₀[H⁺]
Arterial pH = 7.4
Venous pH = 7.36

Answer 5

9.65%

Question 6

Assess the acid-base status of the four patients below.

Answer 6

Normal with mild hypoxaemia

Question 7

Assess the acid-base status of the four patients below.

Answer 7

Uncompensated respiratory acidosis with very mild hypoxaemia

Question 8

Assess the acid-base status of the four patients below.

Answer 8

Uncompensated respiratory alkalosiswith severe hypoxaemia

Question 9

Assess the acid-base status of the four patients below.

Answer 9

Deceased

Question 10

Estimate the volume of respiratory acid (i.e. CO2) produced in a typical adult over a 24-hour period.

Typical cardiac output is 5 L/min

Answer 10

Question 11

Calculate the pH of an arterial blood gas sample if the [H+] is 48 nmol/L.

[H⁺] = 10^-pH

Answer 11

7.32

Question 12

Diagnose:

Answer 12

Uncompensated metabolic acidosis with severe hypoxaemia

Question 13

Diagnose:

Answer 13

Partially compensated metabolic alkalosis with moderate hypoxaemia

Question 14

Diagnose:

Answer 14

Uncompensated mixed acidosis with severe hypoxaemia

Question 15

Diagnose:

Answer 15

Partially compensated metabolic acidosis with normoxaemia

Question 16

Diagnose:

Answer 16

Uncompensated mixed acidosis with severe hypoxaemia

Question 17

Diagnose:

Answer 17

Fully compensated resp alkalosis/met acidosis with mild hypoxaemia

Question 18

Diagnose:

Answer 18

Partially compensated respiratory acidosis with severe hypoxaemia

Question 19

Diagnose:

Answer 19

Uncompensated metabolic alkalosis with normoxaemia

Question 20

Diagnose:

Answer 20

Normal with mild hypoxamemia

Question 21

Diagnose:

Answer 21

Uncompensated respiratory acidosis with mild hypoxaemia

Question 22

Diagnose:

Answer 22

Uncompensated respiratory alkalosis with severe hypoxaemia

Question 23

Diagnose:

Answer 23

Fully compensated resp alkalosis/met acidosis with normoxaemia

Question 24

Diagnose:

Answer 24

Fully compensated resp acidosis/met alkalosis with mild hypoxaemia

Question 25

Diagnose:

Answer 25

Fully compensated resp acidosis/met alkalosis with mild hypoxaemia

Question 26

Diagnose:

Answer 26

Uncompensated metabolic acidosis with mild hypoxaemia

Question 27

Diagnose:

Answer 27

Fully compensated resp alkalosis/met acidosis with normoxaemia

Question 28

Diagnose:

Answer 28

Normal

Question 29

Diagnose:

Answer 29

Deceased

Question 30

Diagnose:

Answer 30

Partially compensated respiratory acidosis with moderate hypoxaemia

Question 31

Diagnose:

Answer 31

Partially compensated respiratory alkalosis with normoxaemia

Question 32

Diagnose:

Answer 32

Fully compensated resp alkalosis/met acidosis with normoxaemia

Question 33

Diagnose:

Answer 33

Uncompensated mixed acidosis with moderate hypoxaemia

Question 34

Diagnose:

Answer 34

Partially compensated metabolic acidosis with normoxaemia

Question 35

Diagnose:

Answer 35

Partially compensated metabolic alkalosis with mild hypoxaemia

Question 36

Diagnose:

Answer 36

Uncompensated mixed alkalosis with normoxaemia

Question 37

Diagnose:

Answer 37

Partially compensated respiratory acidosis with normoxaemia