Methods and systems for draining cerebrospinal fluid into the venous system

A shunt configured for endovascular deployment in a patient, the shunt comprising:

• a distal portion configured for being introduced from a venous system of the patient into, and disposed within, a subarachnoid space of the patient, the subarachnoid space containing cerebrospinal fluid (CSF);
• a proximal portion configured for being disposed within the venous system when the distal portion is disposed with the subarachnoid space;
• and
• a shunt body comprising a lumen, the lumen extending from the distal portion to the proximal portion, wherein the lumen is in fluid communication with one or more CSF intake openings in the distal portion, and with one or more CSF outflow openings in the proximal portion, wherein the distal portion comprises an expandable distal anchoring mechanism configured to retain the distal portion within the subarachnoid space and to maintain the one or more CSF intake openings separated, apart, and/or directed away from an arachnoid layer of the subarachnoid space,
• such that, when the distal portion of the shunt is disposed within the subarachnoid space, and the proximal portion of the shunt disposed within the venous system, CSF flows from the subarachnoid space, through the one or more CSF intake openings, shunt lumen, and the one or more CSF outflow openings, respectively, into the venous system.