A nurse is teaching a client who has venous insufficiency due to deep-vein thrombosis. Which of the following Instructions should the nurse include in the teaching?

A. Administer a dose of subcutaneous epinephrine.: The swelling of the lips and tongue is indicative of angioedema, a serious adverse reaction to captopril. Epinephrine is the first-line treatment for severe allergic reactions or angioedema to quickly counteract the swelling and prevent airway obstruction.

B. Advise the client not to consume grapefruit products.: Grapefruit can interact with some medications, but it is not related to the management of angioedema. This action would be more relevant for drugs metabolized by CYP3A4, not specifically for angioedema.

C. Place warm compresses on both sides of the client's face.: Warm compresses are not appropriate for angioedema and may not address the underlying issue. This action does not manage the immediate, potentially life-threatening reaction caused by captopril.

D. Swab the client's oral mucosa with nystatin suspension.: Nystatin is used for fungal infections of the oral mucosa, not for angioedema. This action does not address the adverse reaction related to captopril.

A) Teach the client to void over a urine strainer: After lithotripsy, clients are often advised to void over a strainer to catch any small stone fragments that may pass. This helps in monitoring the passage of stone fragments and ensures that any remaining stones can be analyzed for further management.

B) Administer oxybutynin to the client twice per day: Oxybutynin is an anticholinergic medication used to treat bladder spasms. It is not routinely used after lithotripsy unless specifically prescribed for bladder spasms, which are not a common postoperative concern for this procedure.

C) Encourage frequent ambulation for the client: Frequent ambulation is beneficial after lithotripsy as it helps promote overall recovery, reduces the risk of complications like deep vein thrombosis, and can facilitate the passage of stone fragments. Encouraging movement is an essential aspect of postoperative care.

D) Check the client's urine for ketones three times per day: Monitoring for ketones is not typically required following lithotripsy unless there is a specific concern about diabetic ketoacidosis or another condition that warrants ketone monitoring. It is not a standard intervention for postoperative care after lithotripsy.

E) Instruct the client to drink 3 L of fluid per day: Increasing fluid intake is crucial after lithotripsy to help flush out any remaining stone fragments and to prevent new stone formation. Drinking 3 liters of fluid per day is generally recommended to maintain adequate hydration and support the urinary system.