A nurse is reviewing laboratory results for a client who is taking warfarin. Which of the following laboratory tests determines if the dose of medication is within the recommended target range?

Choice A reason: Avoiding physical exercise is not recommended for multiple sclerosis, as moderate activity like walking or stretching improves muscle strength, balance, and fatigue management. Complete avoidance leads to deconditioning, worsening mobility and fatigue, which are common in MS, making this instruction counterproductive to symptom management.
Choice B reason: Taking hot baths is not advised for multiple sclerosis, as heat can exacerbate symptoms like fatigue and muscle weakness due to temperature sensitivity (Uhthoff’s phenomenon). Cool or lukewarm baths are safer, supporting symptom control, making this instruction harmful and inappropriate for MS management.
Choice C reason: Performing daily stretching exercises improves flexibility, reduces spasticity, and enhances mobility in multiple sclerosis. Stretching strengthens muscles and prevents contractures, supporting functional independence. This aligns with evidence-based MS management to mitigate symptoms and improve quality of life, making it the correct instruction.
Choice D reason: Limiting fluid intake to reduce bladder irritation is inappropriate, as adequate hydration (2-3 L/day) prevents urinary tract infections, common in MS due to bladder dysfunction. Fluid restriction can worsen symptoms and dehydration, making this instruction incorrect for managing MS-related bladder issues effectively.

Choice A reason: Informed consent does not prevent a client from refusing the procedure, as they retain the right to withdraw consent at any time before or during the process. This statement is incorrect, as it misrepresents the client’s autonomy and legal rights under informed consent principles.
Choice B reason: The nurse’s role in witnessing consent is to verify the client’s voluntary agreement, not to explain the procedure in detail. The surgeon or provider is responsible for detailed explanations, making this action outside the nurse’s scope in this context and incorrect.
Choice C reason: Explaining risks and benefits is the surgeon’s responsibility, not the nurse’s when witnessing consent. The nurse ensures the client understands and agrees voluntarily but does not provide the explanation, making this an incorrect description of the nurse’s role in the process.
Choice D reason: The client’s voluntary agreement is a core legal requirement of informed consent, which the nurse verifies as a witness. This ensures the client understands the procedure, risks, and benefits and consents without coercion, aligning with ethical and legal standards, making it correct.