Patent ID: 7513883

Claim:
A method of shunting fluid, comprising: positioning an inlet port of a shunt to receive fluid from a subarachnoid space in a spinal column; and positioning an outlet port of the shunt to deliver fluid to an epidural space of the spinal column such that fluid is drained from the subarachnoid space into the epidural space, wherein positioning the inlet and outlet ports comprises inserting a dual-lumen cannula through tissue to position an open end of a first lumen of the cannula within the epidural space and to position an open end of a second lumen of the cannula within the subarachnoid space, and inserting a first catheter through the first lumen to position an end of the first catheter within the epidural space, and inserting a second catheter through the second lumen to position an end of the second catheter within the subarachnoid space.