Final answer:
In the case of an air embolus after a central line procedure, the patient should be turned on the left side and placed in the Trendelenburg's position, administered oxygen, and immediate medical assistance should be sought.
Step-by-step explanation:
When a patient becomes confused, disoriented, and pale after the disconnection of a syringe from a subclavian central line, the nurse suspects an air embolus. To manage this, the nurse should turn the patient on their left side and place the bed in the Trendelenburg's position. This position helps to trap air in the apex of the right atrium, reducing the risk of it moving to the lungs or cerebral circulation. The nurse should then administer oxygen and notify the medical team immediately for further assessment and intervention.