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5 Severe Magnesium Abnormalities Online Quiz Questions

Use this free practice quiz with 20 questions to review 5 Severe Magnesium Abnormalities, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: Magnesium deficiency can promote renal potassium loss and make hypokalemia difficult to correct with potassium replacement alone.

  1. A

    True

  2. B

    False

02
Written response
1 point

In severe hypomagnesemia associated with torsades de pointes, which ECG interval may be prolonged? Enter its abbreviation.

03
Fill in the blank
1 point

A patient with kidney failure and high serum magnesium develops bradycardia, PR prolongation, and QRS widening. These findings suggest .

04
Choose one
1 point

A hospitalized patient with severe hypomagnesemia has tetany, a seizure, and hemodynamic instability. Which replacement route is appropriate as an emergency intervention?

  1. A

    Oral magnesium replacement as the sole emergency intervention

  2. B

    Intravenous magnesium sulfate with monitored, protocol-guided treatment

  3. C

    Potassium replacement alone

  4. D

    No replacement until the patient is stable

05
Written response
1 point

Which intravenous medication can temporarily counteract magnesium's cardiac and neuromuscular effects in severe magnesium toxicity?

06
Choose one
1 point

A patient with markedly low magnesium develops a prolonged QT interval and torsades de pointes. What is the most appropriate immediate magnesium intervention?

  1. A

    Wait for the vomiting to stop before treating the rhythm

  2. B

    Give oral magnesium and arrange routine follow-up

  3. C

    Give intravenous magnesium sulfate urgently and use continuous ECG monitoring

  4. D

    Correct potassium only and reassess the rhythm the following day

07
True or false
1 point

True or false: Worsening hypermagnesemia can lead to high-grade heart block and respiratory depression.

  1. A

    True

  2. B

    False

08
Fill in the blank
1 point

Severe hypomagnesemia can cause tetany and the serious neurologic manifestation of .

09
Choose all
1 point

A patient with severe symptomatic hypomagnesemia is receiving intravenous replacement. Select all appropriate monitoring or reassessment measures.

  1. A

    Continuous cardiac monitoring

  2. B

    Reassessment of neurologic status

  3. C

    Assessment of blood pressure and renal function

  4. D

    Routine assessment of visual acuity as the key electrolyte-related check

  5. E

    Reassessment of magnesium, potassium, and calcium

  6. F

    Closer monitoring when renal function is impaired

10
Choose one
1 point

A patient with advanced kidney disease who takes magnesium-containing laxatives becomes drowsy and hypotensive, loses deep-tendon reflexes, and develops bradycardia. Which abnormality is most likely?

  1. A

    Severe hypomagnesemia

  2. B

    Symptomatic hypermagnesemia

  3. C

    Isolated hypokalemia

  4. D

    A primary QT-prolongation disorder

11
Choose all
1 point

A patient receiving magnesium therapy develops weakness, drowsiness, absent reflexes, shallow breathing, and hypotension. Select all appropriate priorities for suspected severe magnesium toxicity.

  1. A

    Stop magnesium administration and other magnesium sources

  2. B

    Support airway, breathing, and circulation while monitoring ECG and vital signs

  3. C

    Continue magnesium to prevent further electrolyte shifts

  4. D

    Give intravenous calcium for severe manifestations according to emergency protocol

  5. E

    Consider hemodialysis for severe or refractory toxicity, especially with significant renal impairment

12
Choose one
1 point

In a patient with hypermagnesemia, when may a loop diuretic be considered to promote magnesium removal?

  1. A

    Give a loop diuretic in every case, regardless of renal function or volume status

  2. B

    Use a loop diuretic instead of stabilizing airway, breathing, and circulation

  3. C

    Consider a loop diuretic when kidney function and volume status allow

  4. D

    Use a loop diuretic to reverse magnesium's cardiac effects immediately

13
True or false
1 point

True or false: When assessing severe magnesium deficiency, potassium and calcium abnormalities may also need to be checked and addressed.

  1. A

    True

  2. B

    False

14
Open ended
1 point

Compare the emergency priorities for a patient with severe hypomagnesemia and torsades de pointes with those for a patient with severe hypermagnesemia and respiratory or cardiac manifestations. Explain the role of urgent treatment, monitoring, and magnesium removal in each situation.

15
Choose one
1 point

A patient with advanced kidney disease has been taking magnesium-containing laxatives and develops drowsiness, hypotension, weak reflexes, and bradycardia. Which magnesium abnormality best explains these findings?

  1. A

    Severe hypomagnesemia

  2. B

    Symptomatic hypermagnesemia

  3. C

    Isolated hypocalcemia

  4. D

    Torsades de pointes

16
Written response
1 point

A hemodynamically unstable patient has severe hypomagnesemia with tetany and a seizure. What route should be used for emergency magnesium sulfate replacement?

17
Choose one
1 point

A patient’s potassium remains low despite replacement, and testing shows a low magnesium level. Which approach best addresses a reason the hypokalemia may be refractory?

  1. A

    Stop potassium replacement because magnesium deficiency prevents potassium from entering the bloodstream.

  2. B

    Give a loop diuretic to retain potassium, without replacing magnesium.

  3. C

    Replete magnesium as clinically indicated and continue monitoring and replacing potassium.

  4. D

    Treat with calcium alone because low calcium is the usual cause of refractory hypokalemia.

18
Written response
1 point

Which intravenous medication can temporarily counteract the cardiac and neuromuscular effects of severe magnesium toxicity?

19
Choose one
1 point

A patient with markedly low serum magnesium develops torsades de pointes. Which immediate magnesium intervention is most appropriate?

  1. A

    Give intravenous magnesium sulfate urgently and use continuous ECG monitoring.

  2. B

    Give oral magnesium and reassess the ECG the next day.

  3. C

    Replace potassium only and defer magnesium treatment until the rhythm resolves.

  4. D

    Start a loop diuretic to increase magnesium removal.

20
Choose one
1 point

A patient with severe symptomatic hypomagnesemia is receiving intravenous replacement. Which monitoring and reassessment plan is most complete?

  1. A

    Monitor temperature only; laboratory reassessment is unnecessary after replacement begins.

  2. B

    Monitor urine color and repeat magnesium only if the patient reports muscle pain.

  3. C

    Monitor blood pressure and calcium only; cardiac monitoring is not needed in hypomagnesemia.

  4. D

    Use continuous cardiac monitoring and reassess neurologic status, blood pressure, renal function, magnesium, potassium, and calcium.