Order: Magnesium Sulfate 1 gram in 100mLs 0.09% NaCl over 2 hours. IV tubing has a drop factor of 30 gtt/mL. How many drops per minute will you give?
25 gtt/min
1500 gtt/min
50 gtt/min
83 gtt/min
The Correct Answer is C
A. 25 gtt/min: Calculating the correct rate reveals that this is not the correct answer.
B. 1500 gtt/min: This rate is too high; the calculation does not support this answer.
C. 50 gtt/min: To calculate: (100 mL / 120 min) × 30 gtt/mL = 50 gtt/min.
D. 83 gtt/min: This is too high based on the calculation.
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Correct Answer is B
Explanation
A. "I am constipated." Constipation is not a common indicator of digoxin toxicity; it may be more related to diet or other medications.
B. "My vision seems yellow." Yellow or blurred vision, also called xanthopsia, is a classic sign of digoxin toxicity and should be reported immediately.
C. "My tongue is red and beefy." A red and beefy tongue may indicate vitamin B12 deficiency, not digoxin toxicity.
D. "I am gaining weight." Weight gain is usually a sign of fluid retention or worsening heart failure, not specifically digoxin toxicity.
Correct Answer is B
Explanation
A. Creatine kinase-myocardial band (CK-MB) test: While CK-MB is also a marker of myocardial injury, it is less specific than troponin and can be elevated in other conditions, such as muscle injury.
B. Troponin T test. The Troponin T test is highly specific and sensitive for myocardial injury and is considered the gold standard for diagnosing a myocardial infarction. Troponin levels rise within hours of cardiac muscle injury and remain elevated for days, providing an early and reliable indicator of cardiac muscle damage.
C. Brain natriuretic peptide (BNP) test. BNP levels are used to assess heart failure and do not indicate acute cardiac muscle injury.
D. Creatine kinase (CK) test. CK measures overall muscle injury, not specific to cardiac muscle.