The use of diuretics in the treatment of heart failure may lead to what condition?
Fluid retention.
Hypotension.
Hyperglycemia.
Diarrhea.
The Correct Answer is B
Diuretics are medicines that help the kidneys get rid of excess water and salt, which can ease the symptoms of heart failure, such as breathlessness and swelling. However, diuretics may also lower the blood pressure by reducing the blood volume and the cardiac output. This can cause symptoms such as dizziness, fatigue, or fainting. Hypotension is defined as a systolic blood pressure lower than 90 mmHg or a diastolic blood pressure lower than 60 mmHg.
Choice A is wrong because fluid retention is the opposite of what diuretics do. Diuretics increase the urine output and decrease the fluid accumulation in the body.
Choice C is wrong because hyperglycemia is not a common side effect of diuretics. Hyperglycemia is a condition where the blood sugar level is too high. Diuretics may affect the blood sugar level in some cases, but usually not significantly.
Choice D is wrong because diarrhea is not a typical side effect of diuretics.
Diarrhea is a condition where the stool is loose and watery. Diuretics may cause some gastrointestinal discomfort, such as nausea or cramps, but not diarrhea.
Normal ranges for blood pressure are 120/80 mmHg for systolic/diastolic in healthy adults, and 140/90 mmHg or higher for hypertension. Normal ranges for blood sugar are 70-100 mg/dL for fasting glucose, and less than 140 mg/dL for postprandial glucose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Vitamin K is the antidote for warfarin toxicity because it can reverse the effects of warfarin by restoring the clotting factors.Warfarin is an oral anticoagulant that works by inhibiting vitamin K epoxide reductase, an enzyme that activates vitamin K in the body.Vitamin K is needed for the synthesis of active coagulation factors, such as II, VII, IX and X.By blocking vitamin K, warfarin reduces the blood’s clotting activity and prevents the formation of blood clots.
Choice A is wrong because vitamin B12 is not involved in the coagulation cascade.Vitamin B12 is mainly involved in DNA synthesis, red blood cell production and nerve function.
Choice C is wrong because calcium gluconate is not an antidote for warfarin toxicity.Calcium gluconate is used to treat low blood calcium levels or hypocalcemia.Calcium is also a cofactor for some coagulation factors, but it does not reverse the effects of warfarin.
Choice D is wrong because protamine sulfate is not an antidote for warfarin toxicity.
Protamine sulfate is used to reverse the effects of heparin, another type of anticoagulant that works by inhibiting thrombin and factor Xa.
Protamine sulfate does not affect the vitamin K-dependent coagulation factors that are inhibited by warfarin.
Normal ranges for coagulation tests that are affected by warfarin are:
• Prothrombin time (PT): 11 to 13.5 seconds
• International normalized ratio (INR): 0.8 to 1.2
• Activated partial thromboplastin time (aPTT): 25 to 35 seconds
Correct Answer is B
Explanation
PT stands for prothrombin time, which is a measure of how long it takes the blood to clot.
INR stands for international normalized ratio, which is a way of standardizing the PT results across different laboratories.
Warfarin is a blood thinner that works by inhibiting the production of vitamin K-dependent clotting factors in the liver.
Therefore, warfarin prolongs the PT and increases the INR.The PT/INR test is used to monitor the effectiveness of warfarin therapy and adjust the dose accordingly.
Choice A is wrong because PTT stands for partial thromboplastin time, which is another measure of blood clotting time, but it reflects the activity of different clotting factors than PT.PTT is used to monitor heparin therapy, not warfarin therapy.
Choice C is wrong because aPTT stands for activated partial thromboplastin time, which is a variation of PTT that uses an activator to speed up the clotting time.Like PTT, aPTT is used to monitor heparin therapy, not warfarin therapy.
Choice D is wrong because ACT stands for activated clotting time, which is a measure of the whole blood clotting time.ACT is used to monitor high-dose heparin therapy during certain procedures, such as cardiac bypass surgery or angioplasty.
The normal ranges for these tests may vary depending on the laboratory and the method used, but generally, they are:
• PT: 10 to 13 seconds
• INR: 0.8 to 1.2 (without warfarin) or 2.0 to 3.0 (with warfarin)
• PTT: 25 to 35 seconds
• aPTT: 30 to 40 seconds
• ACT: 70 to 120 seconds
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