Correct Answer: D

Rationale: Chronic urinary retention can lead to an elevated blood urea nitrogen (BUN) level due to impaired kidney function. When urine is not effectively eliminated from the body, waste products, including urea, accumulate in the bloodstream. This can result in an increase in BUN levels, indicating potential kidney dysfunction in the setting of chronic urinary retention. Hypertension (Choice A), peripheral edema (Choice B), and tachycardia and other dysrhythmias (Choice C) are not specifically associated with chronic urinary retention but may be related to other conditions or comorbidities.

Correct Answer: A

Rationale: Assessing own biases and attitudes is the first step a nurse should take when beginning to use patient-centered care and cultural competence to improve nursing care. By becoming more aware of one's biases and attitudes about human behavior, the nurse can enhance self-awareness and self-reflection. This self-awareness is vital in understanding one's own perspectives, beliefs, and values that may influence interactions with patients from different cultural backgrounds. It also allows the nurse to identify areas that may require improvement or further education. Understanding and addressing personal biases is fundamental to providing patient-centered care and avoiding potential cultural misunderstandings that may arise in the healthcare setting.

Correct Answer: A

Rationale: External otitis, also known as swimmer's ear, is an infection of the outer ear canal. It is often characterized by aural tenderness, which means that the ear is sensitive to touch and can be painful, especially when pressure is applied to the area. This tenderness is a hallmark symptom of external otitis and helps differentiate it from other ear conditions. Other common symptoms of external otitis include ear pain, itchiness, redness, and swelling of the ear canal. External otitis is usually not accompanied by a high fever, and it is not typically related to an upper respiratory infection. Using cotton-tipped applicators to clean the ear can actually increase the risk of developing external otitis by disrupting the natural protective barrier of the ear canal.

Correct Answer: D

Rationale: When caring for a patient receiving total parenteral nutrition (TPN), it is crucial to maintain strict aseptic technique to prevent infection. Wearing a sterile mask when changing the central venous catheter dressing helps to reduce the risk of introducing pathogens into the catheter site, which can lead to serious bloodstream infections. It is essential to use sterile gloves, a sterile mask, and to assess the insertion site for any signs or symptoms of infection during central venous catheter dressing changes. Additionally, to prevent infection, TPN infusion tubing should be changed every 24 hours, and no single container of TPN should be hung for longer than 24 hours, with lipids not running for longer than 12 hours.

Correct Answer: A

Rationale: The patient undergoing interstitial implant for high-dose radiation (HDR) for prostate cancer will emit radiation that poses a risk to others. Limiting the time that visitors spend at the patient's bedside is essential to minimize their exposure to radiation. It is important to follow safety measures to protect both the patient and others from potential harm. Other options such as teaching the patient to perform basic care independently, assigning male nurses, or situating the patient in a shared room with other brachytherapy patients do not directly address the safety concern of radiation exposure to visitors.