Correct Answer: A

Rationale: The correct first action for the nurse to take in this situation is to check the IV tubing for obstruction. By doing this, the nurse can assess if there is any blockage or kink in the tubing that is impeding the flow of the IV solution. This step is crucial as it helps in identifying the reason for the inadequate infusion rate. Increasing the infusion rate (Choice B) without first checking for obstructions can lead to potential complications if there is a blockage. Administering a bolus of fluid (Choice C) may not be appropriate without addressing the cause of the decreased infusion rate. Similarly, replacing the IV catheter (Choice D) is not the initial priority unless obstruction is ruled out and other troubleshooting measures have been taken.

Correct Answer: A

Rationale: When changing the linen on a client's bed, it is essential for the nurse to hold the linen away from their body and clothing. This practice helps prevent contamination and maintain a clean environment. Folding the linen neatly before placing it in the laundry (Choice B) is a good practice but not the immediate action required during linen changing. Wearing clean gloves while handling the linen (Choice C) is important in certain situations but may not be necessary for routine linen changing. Placing the linen directly on the floor until the new linen is in place (Choice D) is incorrect as it can lead to contamination and is not hygienic.

Correct Answer: C

Rationale: The correct answer is C because effective teaching is demonstrated when the client can independently perform ostomy care. This indicates that the client has understood and retained the information provided during teaching. Choices A, B, and D are incorrect because demonstrating how to irrigate the colostomy, verbalizing understanding of dietary changes, and expressing feelings about the impact of the colostomy are important aspects of care but do not directly reflect the client's ability to apply the taught information in a practical setting.

Correct Answer: C

Rationale: The correct answer is 'C: Sore throat.' Oxygen toxicity can manifest with symptoms like a sore throat, cough, chest pain, difficulty breathing, and fatigue. However, a sore throat can be an early indicator of oxygen toxicity and should prompt immediate attention. Nasal congestion, cough, and fatigue are not specific indicators of oxygen toxicity but could be related to other factors in a client with COPD receiving oxygen therapy.

Correct Answer: C

Rationale: The correct answer is C. Taking water pills (diuretics) only when feeling short of breath is incorrect. Diuretics should be taken regularly as prescribed to help manage fluid retention in chronic heart failure. This statement indicates a need for further teaching as the client needs to understand the importance of consistent medication adherence. Choices A, B, and D demonstrate good understanding of self-care management in heart failure, including daily weight monitoring, prompt reporting of worsening symptoms to the healthcare provider, and dietary sodium restriction, respectively.