A nurse is caring for a client who is on warfarin therapy for atrial fibrillation. The client's INR is 5.2. Which of the following medications should the nurse prepare to administer?

Choice A reason: Client report of a headache is not the nurse's priority to report to the provider. A headache is a common and mild side effect of vancomycin, which is an antibiotic used to treat serious infections. A headache may be caused by dehydration, stress, or other factors, and can be relieved by drinking fluids, resting, or taking analgesics.

Choice B reason: Audible inspiratory stridor is the nurse's priority to report to the provider. Stridor is a high-pitched, wheezing sound that occurs when breathing in, and indicates a narrowing or obstruction of the airway. Stridor may be a sign of a severe allergic reaction, or anaphylaxis, to vancomycin, which can be life-threatening. Anaphylaxis can also cause swelling of the face, lips, tongue, or throat, difficulty breathing, low blood pressure, and shock. The nurse should stop the infusion, administer epinephrine, and monitor the client's vital signs.

Choice C reason: Client report of tinnitus is not the nurse's priority to report to the provider. Tinnitus is a ringing or buzzing sound in the ears, and may be a rare and serious side effect of vancomycin. Tinnitus may indicate damage to the inner ear, or ototoxicity, which can lead to hearing loss. The nurse should check the client's hearing and report any changes to the provider. The provider may adjust the dose or frequency of vancomycin, or switch to another antibiotic.

Choice D reason: Localized redness at the catheter insertion site is not the nurse's priority to report to the provider. Redness at the catheter insertion site may indicate irritation, inflammation, or infection of the skin or vein, and may be caused by the needle, the catheter, or the medication. The nurse should inspect the site, clean it with antiseptic, and apply a sterile dressing. The nurse should also monitor the site for signs of phlebitis, such as pain, swelling, warmth, or pus. The nurse may need to change the catheter or the infusion site if the redness persists or worsens.

Choice A reason: Eating a green salad every night with dinner is not the statement that indicates a need for further teaching. This is a consistent and balanced dietary choice for the client, as long as the amount of vitamin K in the salad is not excessive or variable. Vitamin K is a nutrient that helps the blood to clot and can interfere with the action of warfarin, which is an anticoagulant that inhibits the formation of blood clots. The client should avoid sudden changes in their intake of vitamin K and inform the provider of any dietary modifications.

Choice B reason: Taking this medication at the same time each day is not the statement that indicates a need for further teaching. This is a correct and important instruction for the client, as it helps to maintain a steady and effective level of warfarin in the blood. Warfarin has a narrow therapeutic range and requires frequent monitoring and dose adjustment. The client should take the medication as prescribed and avoid missing or skipping doses.

Choice C reason: Starting to take ginger root to treat joint stiffness is the statement that indicates a need for further teaching. This is a risky and potentially harmful herbal supplement for the client, as it can interact with warfarin and increase its anticoagulant effect. Ginger root has antiplatelet and fibrinolytic properties, which can inhibit the formation of blood clots and enhance the breakdown of fibrin, a protein that stabilizes blood clots. Taking ginger root with warfarin can increase the risk of bleeding and bruising and alter the international normalized ratio (INR), which is a measure of the blood's clotting ability. The client should avoid taking ginger root and other herbal supplements without consulting the provider.

Choice D reason: Having the INR checked three weeks ago is not the statement that indicates a need for further teaching. This is a reasonable and appropriate frequency for the client, depending on their stability and response to warfarin therapy. The INR is a blood test that measures the time it takes for the blood to clot and indicates the effectiveness of warfarin. The target INR range for most clients is 2 to 3, but it may vary depending on the indication and the risk of bleeding. The client should have their INR checked regularly and follow the provider's orders and the protocol for dose adjustment.