Pulmonary - Acidosis/Alkalosis
All items taken from Buckwalter's lecture
- 1.
The best representation of the normal range of pH that we have been taught is:
- A.
7.35 - 7.45
- B.
7.25 - 7.35
- C.
7.3 - 7.4
- D.
7.45 - 7.55
Correct Answer
A. 7.35 - 7.45 -
- 2.
Normal range for PaCO2:
- A.
2 - 3
- B.
45 - 55
- C.
35 - 45
- D.
Over 100
Correct Answer
C. 35 - 45 -
- 3.
These are some causes of respiratory acidosis: (check all that apply)
- A.
Chest wall injury
- B.
Stimulants
- C.
Narcotics & sedatives
- D.
Atelectasis
Correct Answer(s)
A. Chest wall injury
C. Narcotics & sedatives
D. AtelectasisExplanation
basic cause of respiratory acidosis is HYPOVENTILATIONRate this question:
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- 4.
PH below 7.40, kidneys will ______ HCO3- pH above 7.40, kidneys will ______ HCO3-
- A.
PH has no effect on kidneys and HCO3-
- B.
Retain, excrete
- C.
Excrete, retain
- D.
Kidneys always retain HCO3- since it's a critical component of the buffering system
Correct Answer
B. Retain, excreteExplanation
HCO3- = bicarb = the "base" of the system. So keeping it will raise pH, getting rid of it will lower pH.
CO2 = the "acid" of the systemRate this question:
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- 5.
These are some causes of metabolic acidosis: (check all that apply)
- A.
Vomiting
- B.
Head injury
- C.
Diuretics
Correct Answer(s)
B. Head injury
C. Diuretics -
- 6.
You can correct a metabolic problem by making adjustments to the patient's ventilator.
- A.
True
- B.
False
Correct Answer
B. False -
- 7.
PH………... 7.22 PaCO2…… 55 HCO3-……. 25 What is it?
- A.
Metabolic acidosis
- B.
Metabolic alkalosis
- C.
Respiratory acidosis
Correct Answer
C. Respiratory acidosisExplanation
1. assess pH: acidotic or alkalotic? acidotic
2. assess PaCO2: acidotic or alkalotic? acidotic - being driven by lungs - respiratory
3. assess HCO3-: acidotic or alkolitic? in normal range - uncompensated respiratory acidosisRate this question:
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- 8.
PH: 7.50 PaCO2: 42 HCO3-: 33 What is it?
- A.
Metabolic alkalosis
- B.
Respiratory alkalosis
- C.
Respiratory acidosis
Correct Answer
A. Metabolic alkalosisExplanation
1. assess pH: acidotic or alkalotic? above 7.45 so alkalotic
2. assess PaCO2: acidotic or alkalotic? within normal range, so not a respiratory source of the problem
3. assess HCO3-: acidotic or alkalotic? above norma range, so alkalotic, so problem is being driven by kidneys.Rate this question:
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- 9.
PH: 7.32 PaCO2: 32 HCO3-: 18 What is it?
- A.
Metabolic acidosis
- B.
Respiratory acidosis
- C.
Respiratory alkalosis
Correct Answer
A. Metabolic acidosisExplanation
1. assess pH: acidotic or alkalotic? acidotic
2. assess PaCO2: acidotic or alkalotic? below normal, so alkalotic…it's not driving the acidosis
3. assess HCO3-: acidotic or alkalotic? below normal, so acidotic…this is driving the acidosis
The PaCO2 is way low - lungs are trying to compensate for the kidneys….it's almost working, pH is close to normal. PARTIALLY COMPENSATED METABOLIC ACIDOSISRate this question:
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Feb 13, 2014Quiz Edited by
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Feb 05, 2014Quiz Created by
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