A client with a diagnosis of chronic obstructive pulmonary disease (COPD) is receiving home oxygen therapy. What is the most important instruction the nurse should provide?

Correct Answer: B

Rationale: The most important instruction the nurse should provide to a client with COPD receiving home oxygen therapy is not to smoke while using oxygen. Smoking near oxygen can cause a fire or explosion due to the flammable nature of oxygen. Choice A is incorrect because using oxygen at the highest flow rate tolerated without medical supervision can be harmful. Choice C is the correct answer as wearing oxygen during physical activity can increase the risk of oxygen combustion. Choice D is not the most important instruction; while storing oxygen tanks properly is essential, the immediate safety concern is the risk of fire due to smoking near oxygen.

Correct Answer: C

Rationale: The correct answer is to only use insulin pens. This is because insulin pens provide a convenient and accurate way to administer insulin. Rotating injection sites is important to prevent tissue damage and promote consistent insulin absorption, making choice A incorrect. Injecting insulin into the same site can lead to lipodystrophy and is not recommended, making choice B incorrect. Mixing different types of insulin in the same syringe can alter their action profiles and is generally not recommended, making choice D incorrect.

Correct Answer: D

Rationale: The correct action the nurse should implement after an EEG is to wash any paste from the client's hair and scalp. This is crucial to prevent irritation and infection at the EEG site. Monitoring vital signs every 4 hours is not specifically indicated after an EEG. Assessing the client's lower extremities for sensation is unrelated to caring for a client post-EEG. While rest may be recommended after the procedure, there is no standard requirement for a specific duration of bed rest.

Correct Answer: A

Rationale: The correct answer is A: Autonomy vs. Shame and Doubt. In Erikson's theory, toddlers aged 1-3 years are in the Autonomy vs. Shame and Doubt stage. During this stage, children begin to assert their independence and control over their environment. The behavior of the hospitalized toddler holding a toy and saying 'Mine' demonstrates the child's developing sense of autonomy and ownership. Choices B, C, and D correspond to different stages in Erikson's theory: Industry vs. Inferiority (school-age children), Initiative vs. Guilt (preschoolers), and Trust vs. Mistrust (infants), respectively, which are not applicable to the behavior described.

Correct Answer: C

Rationale: The correct answer is C: 'Observe a client rotate the subcutaneous site for an insulin pump.' This activity is within the scope of practice for a practical nurse as it involves observing and ensuring proper technique for using an insulin pump, which aligns with their training and responsibilities. Choices A, B, and D are beyond the typical scope of practice for a practical nurse. Completing an admission assessment for a newborn nursery is usually performed by a registered nurse. Discontinuing a dislodged central venous catheter and monitoring a narcotic epidural require advanced skills and knowledge, usually carried out by registered nurses or advanced practice nurses.