Correct Answer: C

Rationale: The best initial dressing for a stage four pressure ulcer with necrotic tissue is a wet-to-moist dressing. This dressing helps to provide moisture, soften necrotic tissue, and prepare the wound bed for healing. It promotes autolytic debridement and can help manage malodorous drainage. Once the necrotic tissue is loosened, other advanced dressings like hydrogel or alginate may be used in the wound bed to facilitate healing.

Correct Answer: A

Rationale: The correct answer is A: 'Avoid foods high in iodine.' Clients with hyperthyroidism should avoid foods high in iodine to prevent exacerbation of their condition. Iodine is an essential component in thyroid hormone production, and excessive iodine intake can worsen hyperthyroidism symptoms. Taking medication with meals (B) can interfere with the absorption of certain thyroid medications. Monitoring weight daily (C) is more relevant for conditions that may lead to weight changes like hypothyroidism. Decreasing fluid intake (D) is not a standard recommendation for hyperthyroidism unless specifically indicated by the healthcare provider.

Correct Answer: B

Rationale: Edema in the fingers and hands can impede the proper functioning of the pulse oximeter, leading to a falsely low oxygen saturation reading. Edema alters the transmission of light through the tissues, affecting the accuracy of the measurement. Therefore, the presence of edema in the fingers and hands is the most likely factor contributing to the low oxygen saturation reading of 91%.

Correct Answer: D

Rationale: When caring for patients from diverse cultural backgrounds, it is essential to respect and consider their cultural norms and practices while providing healthcare. Understanding and incorporating cultural beliefs and values can enhance the quality of care and improve patient outcomes.

Correct Answer: C

Rationale: An elevated AST level following chest pain and shortness of breath is suggestive of myocardial infarction. AST is released from damaged heart muscle cells during a heart attack, indicating cardiac involvement. This enzyme is not specific to liver disease, gallbladder disease, or skeletal muscle injury in this clinical context.