Correct Answer: B

Rationale: Subcutaneous emphysema is the correct answer as it is most concerning in a client with a chest tube following a pneumothorax. It may indicate a pneumothorax recurrence or air leak, requiring immediate intervention to prevent complications. Oxygen saturation of 94% is acceptable and does not require immediate intervention. Crepitus around the insertion site may be a normal finding after chest tube placement and does not necessarily indicate a complication. Drainage of 50 ml per hour is within the expected range for a chest tube and does not require immediate intervention.

Correct Answer: A

Rationale: The correct answer is to instruct the nurse to use a transparent dressing over the site. Transparent dressings allow for continuous observation of the IV site, reducing the risk of complications. Choice B is incorrect because the charge nurse should intervene to ensure the new nurse follows best practices. Choice C is incorrect as the charge nurse should not just assist but provide guidance on the correct procedure. Choice D is incorrect because the size of the dressing is not the issue; it's the type of dressing that allows for better observation.

Correct Answer: C

Rationale: Assessing the client's oxygen saturation is crucial in a client with COPD receiving supplemental oxygen to ensure adequate oxygenation. This assessment helps determine if the current oxygen therapy is effective or if adjustments are necessary. While administering a bronchodilator is important in managing COPD, assessing oxygen saturation takes precedence to address the client's immediate oxygen needs. Assessing the respiratory rate is also important but evaluating oxygen saturation provides more direct information about the client's oxygen status. Elevating the head of the bed can improve ventilation but is not the priority when assessing oxygen saturation in a client with COPD receiving supplemental oxygen.

Correct Answer: C

Rationale: The correct intervention when a nurse finds an irregular heart rate in a newborn is to document the finding in the infant's record. An irregular heart rate is a common occurrence in newborns and does not necessarily require immediate medical intervention. Notifying the pediatrician immediately is unnecessary unless there are other concerning symptoms. Teaching the parents about congenital heart defects is not the priority in this situation. Applying oxygen via nasal cannula at 3 L/min is not indicated for an irregular heart rate without further assessment or medical indication.

Correct Answer: C

Rationale: To calculate the infusion rate, convert 1 mg to 1,000 mcg (1 mg = 1,000 mcg) and then use the formula D/H x Q, where D is the desired dose, H is the dose on hand, and Q is the quantity of solution. In this case, it would be 300 mcg/hour / 1,000 mcg x 250 ml = 75 ml/hour. Therefore, the nurse should program the infusion pump to deliver 75 ml/hour. Choice A (50 ml/hour), Choice B (25 ml/hour), and Choice D (100 ml/hour) are incorrect as they do not correspond to the calculated rate of 75 ml/hour.