Q37: A patient arrives in the emergency room apparently in cardiogenic shock due to a massive heart attack. His initial arterial blood sample reveals the following concentrations of ions: Sodium Bicarbonate Free calcium Potassium pH 137 mmol/L 14 mmol/L 2.8 mmol/L 4.8 mmol/L 7.16 To correct the acidosis, the attending physician begins an infusion of sodium bicarbonate and after 1 hr takes another blood sample, which reveals the following values: Sodium Bicarbonate Free calcium Potassium pH 138 mmol/L 22 mmol/L 2.3 mmol/L 4.5 mmol/L 7.34
Q37: A patient arrives in the emergency room apparently in cardiogenic shock due to a massive heart attack. His initial arterial blood sample reveals the following concentrations of ions: Sodium Bicarbonate Free calcium Potassium pH 137 mmol/L 14 mmol/L 2.8 mmol/L 4.8 mmol/L 7.16 To correct the acidosis, the attending physician begins an infusion of sodium bicarbonate and after 1 hr takes another blood sample, which reveals the following values: Sodium Bicarbonate Free calcium Potassium pH 138 mmol/L 22 mmol/L 2.3 mmol/L 4.5 mmol/L 7.34
Chapter20: Iv Medication And Titration Calculations
Section: Chapter Questions
Problem 39SST
Related questions
Question
![Q37: A patient arrives in the emergency room apparently in cardiogenic shock due to a massive heart
attack. His initial arterial blood sample reveals the following concentrations of ions:
Sodium
Bicarbonate
Free calcium
Potassium
pH
To correct the acidosis, the attending physician begins an infusion of sodium bicarbonate and after 1 hr
takes another blood sample, which reveals the following values:
Sodium
Bicarbonate
Free calcium
Potassium
pH
137 mmol/L
14 mmol/L
2.8 mmol/L
4.8 mmol/L
7.16
138 mmol/L
22 mmol/L
2.3 mmol/L
4.5 mmol/L
7.34
What is the cause of the decrease in calcium ion concentration?
A. The increase in arterial pH resulting from the sodium bicarbonate infusion inhibited parathyroid
hormone secretion
B. The increase in pH resulted in the stimulation of osteoblasts, which removed calcium from the
circulation
C. The increase in pH resulted in an elevation in the concentration of HPO42, which shifted the
equilibrium between HPO42 and Ca11 toward CaHPO4
Answer: C
D. The increase in arterial pH stimulated the formation of 1,25-dihydroxycholecalciferol, which resulted
in an increased rate of absorption of calcium from the gastrointestinal tract](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F12c73aad-a588-4380-8774-2e7e48958bcc%2F0f0f6bc9-f1d9-4d5c-b519-a247079eb277%2Flvvyxtt_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Q37: A patient arrives in the emergency room apparently in cardiogenic shock due to a massive heart
attack. His initial arterial blood sample reveals the following concentrations of ions:
Sodium
Bicarbonate
Free calcium
Potassium
pH
To correct the acidosis, the attending physician begins an infusion of sodium bicarbonate and after 1 hr
takes another blood sample, which reveals the following values:
Sodium
Bicarbonate
Free calcium
Potassium
pH
137 mmol/L
14 mmol/L
2.8 mmol/L
4.8 mmol/L
7.16
138 mmol/L
22 mmol/L
2.3 mmol/L
4.5 mmol/L
7.34
What is the cause of the decrease in calcium ion concentration?
A. The increase in arterial pH resulting from the sodium bicarbonate infusion inhibited parathyroid
hormone secretion
B. The increase in pH resulted in the stimulation of osteoblasts, which removed calcium from the
circulation
C. The increase in pH resulted in an elevation in the concentration of HPO42, which shifted the
equilibrium between HPO42 and Ca11 toward CaHPO4
Answer: C
D. The increase in arterial pH stimulated the formation of 1,25-dihydroxycholecalciferol, which resulted
in an increased rate of absorption of calcium from the gastrointestinal tract
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