A patient with chronic heart failure is prescribed carvedilol. What is the primary purpose of this medication?

Correct Answer: C

Rationale: The correct answer is C: Decrease heart rate. Carvedilol is a beta-blocker that works by blocking the beta-adrenergic receptors in the heart, leading to a decrease in heart rate. This helps reduce the workload of the heart and improve its efficiency in patients with heart failure. Choice A is incorrect because carvedilol may not necessarily increase cardiac output directly. Choice B is incorrect because carvedilol focuses more on improving heart function rather than directly reducing fluid retention. Choice D is incorrect because while carvedilol may lower blood pressure as a secondary effect, its primary purpose in heart failure is to improve cardiac function by decreasing heart rate.

Correct Answer: C

Rationale: The correct answer is C: Before meals. Omeprazole is a proton pump inhibitor that works best when taken before meals to inhibit acid secretion before food intake. Taking it with meals (choice A) may decrease its effectiveness as it needs time to be absorbed. Taking it at bedtime (choice B) may not provide optimal coverage throughout the day. Taking it after meals (choice D) may not allow enough time for the medication to start working before the next meal.

Correct Answer: C

Rationale: The correct answer is C: Promote red blood cell production. Erythropoietin is a hormone that stimulates the production of red blood cells in the bone marrow. This is crucial for patients with CKD who often develop anemia due to decreased erythropoietin production. A: Stimulating white blood cell production is the function of other medications, such as colony-stimulating factors, not erythropoietin. B: Erythropoietin does not have an effect on platelet count. D: Enhancing clotting factor production is not the primary action of erythropoietin.

Correct Answer: C

Rationale: The correct answer is C: Observe the appearance of the skin on the client's legs. In clients with diabetes mellitus, poor circulation can lead to decreased hair growth on the legs. By observing the skin appearance, the nurse can look for signs of poor circulation such as dry skin, thinning of the skin, or discoloration. This assessment provides further data to support the finding of absent hair growth. Choices A, B, and D are incorrect because they do not directly relate to the assessment of absent hair growth in clients with diabetes mellitus. Palpating for femoral pulses assesses circulation but does not specifically address the absence of hair growth. Assessing for Homan's sign evaluates for deep vein thrombosis, which is not directly related to hair growth. Watching posture and balance during ambulation assesses mobility and stability but does not provide information on hair growth or circulation in the legs.

Correct Answer: A

Rationale: To calculate the dose of Streptomycin, we first need to convert the infant's weight from pounds to kg (4 lbs = 1.81 kg). Then, we multiply the weight in kg by the prescribed dose (15 mg/kg) to get the total dose (1.81 kg * 15 mg/kg = 27.15 mg). Since the drug is diluted in 25 ml of D5W, the infant will receive 27.15 mg in 25 ml solution. To find how much Streptomycin the infant actually receives, we need to calculate the amount in 1 ml (27.15 mg / 25 ml = 1.086 mg/ml). Finally, to determine how much the infant will receive over 8 hours, we multiply the concentration by the infusion rate (1.086 mg/ml * 25 ml * 8 hours = 217.2 mg). Therefore, the correct answer is A: 9 mg, as it represents the amount