System is open or system is clamped per medical order.
Interventions A. Position zero point on mounting card at patient's external auditory meatus. Keep zero pointed at external auditory meatus when changing patient's position by moving and leveling mounting card. Keep cylinder attached to mounting card and secured to IV pole at all times. Physician order should include hourly minimum and maximum parameters for CSF drainage. An adult produces approximately 15 -20 ml of CSF per hour.