A client who has atrial fibrillation is prescribed warfarin therapy.
Which of the following statements by the client indicates an understanding of the medication?
“I should avoid foods that are high in vitamin K.”.
“I should take this medication with food.”.
“I should report any unusual bleeding or bruising to my provider.”.
“I should avoid taking aspirin while taking this medication.”.
The Correct Answer is A
Choice A rationale:
The client's statement, "I should avoid foods that are high in vitamin K," indicates an understanding of the medication. Warfarin is an anticoagulant medication that works by inhibiting vitamin K-dependent clotting factors. Consistent intake of vitamin K-containing foods helps maintain a stable INR (International Normalized Ratio) and warfarin's effectiveness. Clients on warfarin should be educated about avoiding drastic changes in their vitamin K intake.
Choice B rationale:
Taking warfarin with food or on an empty stomach doesn't significantly impact its efficacy. Therefore, this statement is not indicative of the client's understanding of the medication.
Choice C rationale:
The statement "I should report any unusual bleeding or bruising to my provider" is important but doesn't specifically reflect an understanding of warfarin. It's a general caution for anyone taking anticoagulants.
Choice D rationale:
While it's important to avoid excessive use of medications like aspirin that can increase the risk of bleeding, this statement doesn't directly demonstrate an understanding of warfarin itself.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Serum creatinine is the most important laboratory value to review before administering an antibiotic that can cause nephrotoxicity. Nephrotoxicity is an alteration in the function of the kidney due to exposure to certain drugs or toxins.
It can be assessed by measuring the glomerular filtration rate (GFR), which is the rate of clearance of a substance from the blood by the kidneys. Serum creatinine is a waste product of muscle metabolism that is freely filtered by the glomeruli and not reabsorbed or secreted by the tubules.
Therefore, it is a reliable indicator of GFR and renal function. An increase in serum creatinine indicates a decrease in GFR and renal function, which may be caused by nephrotoxic drugs.
The other laboratory values are not directly related to nephrotoxicity or GFR:
- Serum calcium: This may be affected by renal function, but it is not a sensitive or specific marker of nephrotoxicity. It may be altered by other factors such as vitamin D, parathyroid hormone, and bone metabolism.
- Hemoglobin and hematocrit: These may be affected by renal function, but they are not sensitive or specific markers of nephrotoxicity. They may reflect the erythropoietin production by the kidneys, which stimulates red blood cell production in the bone marrow. However, they may also be influenced by other factors such as blood loss, hydration status, and iron deficiency.
- White blood cell count (WBC): This is not related to nephrotoxicity or GFR. It may reflect the presence of infection or inflammation, which may be a cause or a consequence of renal impairment, but it is not a direct measure of renal function.
Correct Answer is ["A","B","C","F"]
Explanation
Choice A rationale:
Urticaria is a skin condition characterized by the sudden appearance of raised, itchy, and red welts on the skin. It is an objective finding because it can be observed and assessed visually. The presence of urticaria may indicate an allergic reaction or another underlying condition.
Choice B rationale:
Hypertension, measured using a sphygmomanometer, provides a quantitative value, making it an objective finding. Blood pressure readings such as systolic values above 120 mmHg or diastolic values above 80 mmHg indicate elevated blood pressure levels. Because it is measured directly, hypertension is categorized as objective data that aids in diagnosing and managing cardiovascular conditions.
Choice C rationale:
Diaphoresis refers to excessive sweating, which can be observed and assessed visually. It is an objective finding and may be indicative of various conditions, including anxiety or fever.
Choice D rationale:
Nausea is a subjective symptom because it is a sensation that the client experiences and reports. It cannot be directly observed by the nurse, making it a subjective parameter.
Choice E rationale:
Anxiety is a subjective symptom, as it is a mental and emotional state experienced by the client. It cannot be directly observed, making it a subjective parameter.
Choice F rationale:
Edema is an objective finding because it can be visually assessed by the nurse. Edema is the accumulation of excess fluid in body tissues, and its presence or absence can be objectively determined.
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