Correct Answer: B

Rationale: Yellow-tinged vision is a classic sign of digoxin toxicity due to its effect on the eyes. It can cause a yellow or green visual halo around objects. Bradycardia, constipation, and hypertension are not typical signs of digoxin toxicity. Bradycardia may be a sign of digoxin's therapeutic effect in heart failure, while constipation and hypertension are not commonly associated with digoxin toxicity.

Correct Answer: D

Rationale: The correct answer is D: 'Keep the wound covered with a dry dressing.' When providing care for a wound infection, it is essential to keep the wound covered with a dry dressing to prevent further contamination and promote healing. Soaking the wound in warm water (choice A) can introduce moisture and increase the risk of infection. Using hydrogen peroxide (choice B) can be too harsh and may slow down the healing process by damaging healthy tissue. Applying a cold compress (choice C) is not typically recommended for wound infections, as it may not provide the necessary environment for healing.

Correct Answer: A

Rationale: The correct answer is A: Low back pain. Low back pain is a common sign of a hemolytic transfusion reaction, indicating the destruction of red blood cells. This finding requires immediate intervention as it can lead to serious complications such as renal failure. Bradycardia (choice B) is not typically associated with a hemolytic transfusion reaction. Chills (choice C) can be seen in febrile non-hemolytic transfusion reactions. Distended neck veins (choice D) are more indicative of fluid overload rather than a hemolytic reaction.

Correct Answer: C

Rationale: The correct answer is C: Jugular vein distention. In left-sided heart failure, the left ventricle fails to efficiently pump blood to the body, causing increased pressure in the pulmonary circulation. This increased pressure can lead to symptoms like jugular vein distention, as blood backs up in the pulmonary circulation and causes congestion. Choices A, B, and D are incorrect: Peripheral edema is more commonly associated with right-sided heart failure, cough with frothy sputum is a sign of pulmonary edema which can occur in left-sided heart failure but is not as specific as jugular vein distention, and dependent edema is also more indicative of right-sided heart failure due to fluid retention and increased venous pressure in the systemic circulation.

Correct Answer: B

Rationale: The correct answer is B. Phenytoin can decrease the effectiveness of oral contraceptives, so it is important to inform the client about this interaction. Using an additional form of contraception, such as a backup method, is recommended to ensure adequate protection against pregnancy. Choice A is incorrect because it lacks specificity about the decrease in effectiveness of oral contraceptives caused by phenytoin. Choice C is incorrect as it suggests stopping phenytoin use while using oral contraceptives, which is not the appropriate action. Choice D is incorrect as phenytoin is known to decrease, not increase, the effectiveness of oral contraceptives.