Bedside Ultrasound to Measure Optic Nerve Sheath Diameter in Pediatric CSF Shunts

Bedside ultrasound in the emergency department is useful for quick assessments of patients. One growing use is to measure the optic nerve sheath diameter of patients for whom increased pressure in the head is a concern. This study will look at the optic nerve sheath diameters of a specific population of pediatric patients with shunts that drain extra fluid from their heads.