Correct Answer: D

Rationale: The correct answer is D because using an end-tidal CO2 monitor is the most reliable method to confirm correct endotracheal tube placement in the trachea. This method detects exhaled CO2, indicating proper tube placement in the trachea. It is a quick and efficient way to confirm placement without delay, reducing the risk of complications. A: Auscultating for bilateral breath sounds is not as reliable because breath sounds may be heard even if the tube is misplaced. B: Obtaining a portable chest x-ray is not the best initial action as it takes time and delays confirming tube placement. C: Observing chest movement may not provide conclusive evidence of proper tube placement and can lead to misinterpretation. In summary, using an end-tidal CO2 monitor is the most accurate and efficient method to verify correct endotracheal tube placement compared to the other options.

Correct Answer: B

Rationale: The correct answer is B: Assign the client to a negative air-flow room. This is crucial to prevent the spread of TB to other patients and healthcare workers. Negative air-flow rooms help contain airborne pathogens. Option A is not sufficient as it only protects the client, not others. Option C is important for infection control but not the priority in this situation. Option D is not as effective as placing the client in a negative air-flow room. Overall, option B is the best choice to ensure the safety of everyone in the unit.

Correct Answer: B

Rationale: The correct answer is B: a decreased risk of peritonitis exists. Peritoneal dialysis involves the insertion of a catheter into the peritoneal cavity, which can introduce bacteria and increase the risk of peritonitis. However, compared to hemodialysis, peritoneal dialysis has a lower risk of bloodstream infections and vascular access-related complications, leading to a decreased risk of peritonitis. This advantage makes peritoneal dialysis a favorable option for some patients. Incorrect choices: A: peritoneal dialysis is actually less time-intensive compared to hemodialysis. C: biochemical disturbances are corrected more gradually in peritoneal dialysis. D: the danger of hemorrhage is not specific to peritoneal dialysis.

Correct Answer: B

Rationale: The correct answer is B because giving regular condition updates promotes transparency and communication, reducing anxiety for the family. This intervention helps them stay informed and involved in the patient's care. Choice A may lead to caregiver fatigue and is not sustainable. Choice C limits family support and may increase stress. Choice D focuses on comfort but does not address the family's need for information.

Correct Answer: B

Rationale: The correct answer is B: Abdominal ultrasonography. This is because ultrasonography is a non-invasive imaging technique that can quickly evaluate for internal injuries such as organ damage or bleeding in patients with blunt abdominal trauma. It is a rapid and effective diagnostic tool to assess the extent of injury and guide further management. Peritoneal lavage (A) is an invasive procedure used in trauma settings to detect intra-abdominal bleeding but is not typically used for teaching purposes. Nasogastric tube placement (C) is used for decompression and drainage in certain conditions but is not relevant for assessing abdominal trauma. Magnetic resonance imaging (MRI) (D) is not typically used as the initial imaging modality for acute trauma due to time constraints and its limited availability in emergency settings.