The nurse is assisting with a lumbar puncture on a client. During the procedure, a code is called for another client on the unit who is experiencing respiratory arrest. Which action should the nurse take?

Choice A reason: Closing the room door may reduce distractions, but it does not address the urgent need for staff to respond to the code. This action is insufficient in an emergency situation. Choice B reason: Finishing the procedure is inappropriate because a code situation requires immediate staff response. Continuing the lumbar puncture delays assistance to the client in respiratory arrest, which could be life-threatening. Choice C reason: Calling for an assistant is the correct action. The nurse must remain with the client undergoing the lumbar puncture to ensure safety and sterility of the procedure. By calling for assistance, the nurse ensures that another staff member can respond to the code while maintaining care for the current client. This balances both responsibilities appropriately. Choice D reason: Responding to the code personally would leave the lumbar puncture client unattended, which could compromise safety and sterility. While codes require rapid response, the nurse already engaged in an invasive procedure should delegate the response to available staff rather than abandoning the current client.