A nurse is caring for a client who is prescribed warfarin therapy for an artificial heart valve. Which of the following laboratory values should the nurse monitor for a therapeutic effect of warfarin?

Activated partial thromboplastin time (APTT)

Bleeding time

Prothrombin time (PT)

Hemoglobin (Hgb)

Answer and Explanation

The Correct Answer is C

warfarin inhibits vitamin K epoxide reductase interfering with the synthesis of vitamin K dependent clotting factors (II, VII, IX, and X). This prolongs the prothrombin time, expressed in the form of INR international normalized ratio. Monitoring of INR helps to ensure that the prescribed dosages are within the therapeutic levels without increasing the risk of bleeding. The target INR range is between 2.5 and 3.5.
A. Used to monitor heparin therapy

B, D- not used for monitoring

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Correct Answer is B

Explanation

When using multiple eye drops, it's generally recommended to wait at least 5 minutes between administering each medication. This helps prevent dilution of the medication and improves its absorption.
A is incorrect because holding pressure on the conjunctival sac after administering eye drops is not necessary and may increase systemic absorption of the medication.
C is incorrect because contact lenses should typically be removed before administering eye drops to prevent interference with the medication reaching the eye.
D is incorrect because touching the tip of the dropper to the sclera of the eye can contaminate the dropper tip and increase the risk of infection. It's important to administer eye drops without touching the tip to the eye or any other surface.

A. Renal failure B. Metabolic alkalosis C. Aplastic anemia D. Cardiac dysrhythmia

Correct Answer is C

Explanation

Zidovudine (AZT) is an antiretroviral drug used in treatment of HIV to suppress viral replication. It causes aplastic anemia, suppression of the bone marrow, leasing to reduces production of all hematopoietic cell lines including red blood cells, white blood cells, and platelets.

A, B, and D - are not associated with Zidovudine use

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A nurse is caring for a client who is prescribed warfarin therapy for an artificial heart valve. Which of the following laboratory values should the nurse monitor for a therapeutic effect of warfarin?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse at an ophthalmology clinic is providing teaching to a client who has open-angle glaucoma and a new treatment regimen of timolol and pilocarpine eye drops. Which of the following instructions should the nurse provide?

Correct Answer is B

Explanation

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Correct Answer is C

Explanation

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