ABGs

Question 1

What is the missing range?

pH = 7.35 to 7.45

PaCO2 = 4.7-6 kPA

HCO3 = 22 to 30 mmol/l

BE = -2 to +2 mmol/L

Answer 1

PaO2 = 10.5 to 14 kPa

Question 2

What is your interpretation and likely diagnosis?

Answer 2

Compensated metabolic alkalosis – due to antacid abuse

Question 3

What is the anion gap calculation?

Answer 3

Question 4

What is the missing range?

pH = 7.35 to 7.45

PaO2 = 10.5 to 14 kPa

HCO3 = 22 to 30 mmol/l

BE = -2 to +2 mmol/L

Answer 4

PaCO2 = 4.7-6 kPA

Question 5

What is your interpretation and likely diagnosis?

Answer 5

A partially compensated metabolic acidosis due to DKA

Question 6

What is your interpretation and likely diagnosis?

Answer 6

Uncompensated respiratory acidosis due to a panic attack (CO2 blown off)

Question 7

What is your interpretation and likely diagnosis?

Answer 7

Uncompensated Metabolic Acidosis though bicarb loss in the bowel

Question 8

What is your interpretation and likely diagnosis?

Answer 8

Partially compensated Metabolic acidosis due to sepsis (Lactic acid)

Question 9

What is the missing range?

PaO2 = 10.5 to 14 kPa

PaCO2 = 4.7 to 6 kPa

HCO3 = 22 to 30 mmol/l

BE = -2 to +2 mmol/L

Answer 9

pH = 7.35-7.45

Question 10

What is your interpretation and likely diagnosis?

Answer 10

Uncompensated Resp acidosis due to Guillian Barre and muscle paresis of chest wall

Question 11

What can cause a Metabolic acidosis with normal anion gap?

Answer 11

Bicarb Loss (Diarrhoea) & decreased acid excretion (renal disease)

Question 12

What is the missing range?

pH = 7.35 to 7.45

PaO2 = 11 to 13 kPa

PaCO2 = 4.7 to 6 kPa

BE = -2 to +2 mmol/L

Answer 12

HCO3 = 22-30 mmol/l

Question 13

What is your interpretation and likely diagnosis?

Answer 13

Respiratory acidosis with partial compensation representing an acute worsening upon chronic acidosis

Question 14

Name 3 causes of Metabolic Acidosis

Answer 14

Question 15

What is your interpretation and likely diagnosis?

Answer 15

Normal ABG but in context of hyperventilating asthma patient on 15/L indicates a tiring patient. VERY Dangerous sign

Question 16

What is your interpretation and likely diagnosis?

Answer 16

Uncompensated Metabolic acidosis due to muscle breakdown releasing lactic acid and potassium

Question 17

What is the missing range?

pH = 7.35 to 7.45

PaO2 = 10.5 to 14 kPa

PaCO2 = 4.7 to 6 kPa

HCO3 = 22 to 30 mmol/l

Answer 17

BE = -2 to +2

Question 18

What is the cause of a Metabolic acidosis with raised anion gap?

Answer 18

Raised indicates increased acid production e.g lactic acid, DKA etc.

Question 19

Name a cause of Respiratory Alkalosis

Answer 19

Question 20

What is your interpretation and likely diagnosis?

Answer 20

Loss of potassium leading to shift of hydrogen ions into cells. Uncompensated Metabolic alkalosis.