A nurse is reinforcing teaching with a client who is at risk for hypokalemia. The nurse should instruct the client that which of the following foods is the best source of potassium?

Choice A reason: The nurse applies the sterile drape prior to cleansing the perineal area. This is a correct action by the nurse, as it helps to prevent contamination of the catheter insertion site and maintain a sterile field.

Choice B reason: The nurse coats the indwelling urinary catheter with lubricant. This is a correct action by the nurse, as it helps to ease the insertion of the catheter and reduce the risk of trauma or infection.

Choice C reason: The nurse separates the client's labia with her dominant hand. This is an incorrect action by the nurse, as it violates the principle of sterile technique. The nurse should use her non-dominant hand to separate the labia and expose the urethral meatus, and use her dominant hand to hold the catheter. The non-dominant hand should not touch anything else after separating the labia, as it is considered contaminated.

Choice D reason: The nurse provides perineal care prior to inserting the urinary catheter. This is a correct action by the nurse, as it helps to reduce the bacterial load and prevent infection. The nurse should use soap and water to cleanse the perineal area from front to back, and use a new washcloth for each stroke.

Choice A reason: Prone is not the best position to allow maximal lung expansion. Prone is a position where the client lies on their stomach, with their head turned to one side. Prone can help to improve oxygenation in some cases of acute respiratory distress syndrome (ARDS), but it can also increase the risk of pressure ulcers, facial edema, and airway obstruction.

Choice B reason: Side-lying is not the best position to allow maximal lung expansion. Side-lying is a position where the client lies on their side, with their head supported by a pillow. Side-lying can help to prevent aspiration and reduce the work of breathing in some clients, but it can also compromise the ventilation of the dependent lung.

Choice C reason: Supine is not the best position to allow maximal lung expansion. Supine is a position where the client lies on their back, with their head and shoulders slightly elevated. Supine can help to maintain a patent airway and facilitate suctioning in some clients, but it can also increase the risk of atelectasis, pneumonia, and hypoxemia.

Choice D reason: Upright is the best position to allow maximal lung expansion. Upright is a position where the client sits or stands with their back straight and their chest expanded. Upright can help to improve lung compliance, reduce airway resistance, and enhance gas exchange in clients with respiratory failure. Upright can also reduce the pressure on the diaphragm and abdominal organs, and promote the drainage of secretions.