A nurse cares for a patient recovering from mechanical valve replacement surgery. The patient asks, "Why will I need to take anticoagulants for the rest of my life?" What is the best response by the nurse?
"Blood clots form more easily in mechanical replacement valves."
"The vein taken from your leg reduces circulation in the leg."
"The valve replacement surgery left a lot of small clots in your heart and lungs."
"The mechanical valve places you at greater risk for a heart attack."
The Correct Answer is A
Choice A reason: Blood clots form more easily in mechanical replacement valves due to the artificial surface of the valve, which can cause the blood to clot more readily. This increases the risk of thromboembolic events, such as stroke or valve obstruction. Therefore, patients with mechanical valves need to take anticoagulants for life to prevent clot formation and ensure the valve functions effectively.
Choice B reason: The statement that the vein taken from the leg reduces circulation in the leg is incorrect in this context. Vein grafts from the leg are typically used in coronary artery bypass grafting (CABG) surgery, not in valve replacement surgery. Therefore, this explanation does not apply to the patient's situation of needing anticoagulants after valve replacement surgery.
Choice C reason: The idea that the valve replacement surgery left a lot of small clots in the heart and lungs is not accurate. The surgery itself does not leave clots; rather, the ongoing risk of clot formation is due to the presence of the mechanical valve. This risk necessitates lifelong anticoagulation.
Choice D reason: The mechanical valve does not place the patient at a greater risk for a heart attack specifically. The concern with mechanical valves is the increased risk of blood clot formation, which is why anticoagulants are prescribed. Heart attacks are typically caused by blockages in the coronary arteries, which is a different issue.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Repositioning the patient frequently and promoting deep breathing are important interventions for various conditions, particularly for preventing atelectasis and respiratory complications. However, they are not directly related to preventing the most common serious complication of peritoneal dialysis, which is peritonitis.
Choice B reason: Infusing the dialysate slowly can help manage discomfort and ensure proper fluid exchange during peritoneal dialysis. However, it does not address the most serious complication, which is infection.
Choice C reason: Using strict aseptic technique in dialysis procedures is crucial in preventing peritonitis, the most serious and common complication of peritoneal dialysis. Peritonitis is an infection of the peritoneal cavity and can lead to severe complications if not prevented. Adhering to aseptic techniques during catheter insertion, connection, disconnection, and any other procedure involving the dialysis system is essential to reduce the risk of infection.
Choice D reason: Having the patient empty the bowel before the inflow phase can help ensure adequate space in the peritoneal cavity for the dialysate and prevent discomfort. However, this action does not directly prevent the serious complication of peritonitis.
Correct Answer is B
Explanation
Choice A reason: Vasopressin (Desmopressin) is not primarily used to decrease blood pressure. It is an antidiuretic hormone that helps manage diabetes insipidus by reducing urine output. While vasopressin can have vasoconstrictive effects, its primary role in this context is to control urine production, not blood pressure.
Choice B reason: The primary therapeutic outcome of vasopressin (Desmopressin) in a patient with diabetes insipidus is to decrease urine output. Diabetes insipidus leads to excessive urine production and dehydration. Vasopressin acts on the kidneys to increase water reabsorption, thereby reducing urine volume and helping to maintain fluid balance.
Choice C reason: Level of consciousness is not a direct therapeutic outcome of vasopressin (Desmopressin). While managing fluid balance can indirectly affect a patient's overall condition and well-being, vasopressin specifically targets the kidneys to reduce urine output and does not have a direct impact on consciousness levels.
Choice D reason: Specific gravity refers to the concentration of solutes in the urine. While vasopressin can affect the specific gravity by concentrating the urine and reducing volume, the primary therapeutic goal is to manage urine output in patients with diabetes insipidus. The focus is on reducing the excessive urine production rather than altering specific gravity.
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