Correct Answer: B

Rationale: Removing contact lenses before instilling latanoprost eye drops prevents the lenses from absorbing the medication or becoming damaged, ensuring proper administration for open-angle glaucoma.
Choice A is incorrect because latanoprost is typically instilled in the evening, as it is most effective at night to reduce intraocular pressure.
Choice C is incorrect because, while iris darkening is a possible side effect, it is not guaranteed or permanent in all clients and is not the priority instruction.
Choice D is incorrect because applying pressure to the inner corner (nasolacrimal duct) of the eye, not the outer corner, prevents systemic absorption, but this is less critical than ensuring proper administration.

Correct Answer: C

Rationale: Calf pain and swelling are concerning findings that may indicate deep vein thrombosis (DVT), a known risk of tamoxifen due to its estrogen-like effects on clotting factors, requiring immediate reporting to the provider for evaluation, such as an ultrasound.
Choice A is wrong because hot flashes are a common side effect of tamoxifen due to its anti-estrogenic effects and do not typically require reporting unless severe.
Choice B is wrong because vaginal dryness is an expected side effect of tamoxifen and can be managed with non-hormonal lubricants, not requiring immediate reporting.
Choice D is wrong because a weight gain of 2 kg in 1 month is not significant and may be related to other factors; it should be monitored but does not require immediate reporting.

Correct Answer: D

Rationale:
Choice A is wrong because flushing the catheter with saline should be done after securing the catheter to the skin with a transparent dressing and attaching a primed piece of extension tubing to the catheter.
Choice B is wrong because retracting the stylet should be done after advancing the catheter into the vein and releasing the tourniquet from the client's arm.
Choice C is wrong because releasing the tourniquet should be done after advancing the catheter into the vein and before retracting the stylet. This is because after puncturing the skin and the vein, the nurse needs to advance the catheter into the vein with the finger hub to ensure proper placement and prevent complications such as infiltration or phlebitis.

Correct Answer: C

Rationale: Monitoring for muscle weakness, which may indicate hypokalemia, is critical, as furosemide is a loop diuretic that can cause potassium loss, increasing the risk of arrhythmias in heart failure clients.
Choice A is wrong because clients with heart failure should limit sodium intake to reduce fluid retention, not increase it, to prevent exacerbation of heart failure.
Choice B is wrong because taking furosemide at bedtime is not advised; it should be taken in the morning to avoid nocturia and disrupted sleep due to its diuretic effect.
Choice D is wrong because increasing fluid intake is not recommended for heart failure clients, as it can worsen fluid overload; fluid intake should be guided by the provider based on the client's condition.

Correct Answer: B

Rationale: Reporting unusual bleeding is critical with warfarin due to bleeding risk. Green leafy vegetables affect efficacy, antacids are unrelated, and weight gain is not expected.