The syrinx opening is made with an 11 blade between the dorsal columns. In very large syrinxes, the cavity may be entered where the cord is thinnest.
A 7-0 prolene suture is attached to the pia in preparation for placement of a syrinx stent.
A silastic stent is placed in the syrinx cavity, with the other end lying freely in the subarachnoid space.
The stent is sutured to the pia to prevent it from migrating.