Two days after surgical fixation of a fractured femur, a client suddenly reports chest pain and difficulty in breathing. The nurse suspects the client had a pulmonary embolus. Which action should the nurse take first?

Choice A: Determining the need for urinary catheterization is not a task that the nurse should assign to the PN, as this requires clinical judgment and critical thinking, which are beyond the scope of practice of the PN. This is a distractor choice.

Choice B: Titrating oxygen to prescribed parameters is a task that the nurse can assign to the PN, as this involves following orders and protocols, which are within the scope of practice of the PN. Therefore, this is the correct choice.

Choice C: Receiving a postoperative client and conducting the assessment is not a task that the nurse should assign to the PN, as this requires initial assessment and data collection, which are the responsibility of the registered nurse. This is another distractor choice.

Choice D: Evaluating and updating plans of care for clients is not a task that the nurse should assign to the PN, as this requires nursing diagnosis and outcome identification, which are part of the nursing process that only the registered nurse can perform. This is another distractor choice.

Choice A reason: This is a correct answer because continuing to monitor the client for signs of an infection is important to detect any recurrence or complication of MRSA infection. MRSA is a type of bacteria that is resistant to many antibiotics and can cause serious skin, soft tissue, bone, joint, or bloodstream infections. The nurse should assess the client's vital signs, wound appearance, pain level, and laboratory results.

Choice B reason: This is not a correct answer because calling the healthcare provider for a prescription for linezolid is not necessary unless the client has an active MRSA infection that requires treatment. Linezolid is an antibiotic that can be used to treat MRSA infections, but it has potential side effects and interactions that need to be considered. The nurse should not prescribe or administer antibiotics without a valid order.

Choice C reason: This is a correct answer because collecting multiple sets of blood cultures for MRSA screening is important to identify any asymptomatic bacteremia or sepsis that could result from MRSA infection. MRSA can enter the bloodstream through wounds, catheters, or surgical sites and cause life-threatening complications such as endocarditis, osteomyelitis, or pneumonia. The nurse should obtain blood samples from different sites and times and send them to the laboratory for analysis.

Choice D reason: This is a correct answer because placing the client on contact transmission precautions is important to prevent the spread of MRSA to other clients, staff, or visitors. Contact transmission precautions include wearing gloves and gowns when entering the client's room, using dedicated or disposable equipment, and performing hand hygiene before and after contact with the client or their environment.

Choice E reason: This is not a correct answer because obtaining a sputum specimen for culture and sensitivity is not relevant to the client's history of MRSA wound infection. Sputum culture and sensitivity is a test that can be used to diagnose respiratory infections caused by bacteria, fungi, or viruses. The nurse should only obtain a sputum specimen if the client has signs or symptoms of a respiratory infection, such as cough, fever, chest pain, or dyspnea.