Correct Answer: A

Rationale: At present, the most reliable method for verification of placement of small-bore feeding tubes is x-ray examination. X-ray allows for direct visualization of the tube's placement within the gastrointestinal tract, ensuring it is correctly positioned in the stomach without any risk of inadvertent placement in the lungs, pharynx, or esophagus. This method provides a definitive confirmation of tube placement, which is crucial for patient safety during enteral feeding. While pH testing and aspiration of contents can be useful as supplementary methods, x-ray remains the gold standard for verifying tube placement due to its precision and accuracy. Auscultation, on the other hand, is no longer recommended as a reliable method for tube placement verification, as it may lead to misinterpretation of sounds and potential errors in placement assessment.

Correct Answer: C

Rationale: The nurse's best response is option C - "AIDS isn't transmitted by casual contact." This response is accurate and provides the necessary information to address the friend's concern. It is important to educate the friend that HIV/AIDS is not transmitted through casual contact such as visiting a patient in the hospital. By stating this fact clearly, the nurse can help alleviate any unfounded fears or misconceptions the friend may have about contracting HIV while visiting the patient. This response promotes understanding and helps reduce stigma associated with HIV/AIDS, while also emphasizing the importance of accurate information in preventing the spread of the virus.

Correct Answer: A

Rationale: Mottling of the lower limbs is a common physical sign seen in patients approaching death. This occurs when there is poor circulation leading to a bluish or purplish discoloration of the skin, particularly on the extremities. The appearance of mottling indicates that the body is no longer able to maintain adequate blood flow to the extremities, signaling that the patient is in the final stages of life. It is a significant finding that strongly suggests imminent death in patients with terminal illness, such as in this case of a patient with terminal lung cancer who is unconscious.

Correct Answer: D

Rationale: The correct sequence for drawing up a prescribed amount of sterile solution ordered is as follows: 6, 5, 1, 3, 2, 4.

Correct Answer: C

Rationale: Megestrol is a synthetic progestational agent that has been found to promote significant weight gain in AIDS patients with wasting syndrome by increasing body fat stores. It is commonly used to stimulate appetite and increase caloric intake in patients experiencing anorexia and weight loss due to various medical conditions, including AIDS-related wasting. Megestrol works by increasing appetite and improving food intake, leading to weight gain and improved nutritional status in patients with HIV/AIDS. It has been shown to be effective in reversing weight loss and improving quality of life in these patients. Therefore, the drug megestrol is the most appropriate choice for promoting weight gain in AIDS patients with wasting syndrome and anorexia.