A nurse is reinforcing discharge teaching with a client who has COPD and reports problems with maintaining adequate nutrition. Which of the following instructions should the nurse include?

A. "Self-administer oxygen through your nasal cannula at 6 milliliters per minute during meals." is incorrect. Oxygen should not typically be increased during meals unless specifically prescribed by the provider. If the client has difficulty eating due to breathlessness, a more individualized plan is needed. B. "Drink at least 240 milliliters of water during each meal." is incorrect. Clients with COPD may have difficulty breathing when consuming large amounts of fluids during meals. Overhydration could also worsen fluid retention in some cases. The amount of fluid should be tailored to the client’s needs and prescribed by the healthcare provider. C. "Perform pulmonary hygiene 1 hour before meals." is correct. Pulmonary hygiene (such as postural drainage, coughing techniques, and deep breathing exercises) should be performed before meals to clear the airways and improve the ability to breathe while eating, preventing aspiration and difficulty breathing. D. "Lie down for 30 minutes after eating." is incorrect. Lying down after eating can increase the risk of aspiration, especially in clients with COPD who may already have a compromised respiratory system. The client should be advised to remain upright after meals to prevent reflux and aspiration.