Initial Management of Intracranial Hypotension

Etiology and Presentation

Intracranial hypotension is characterized by orthostatic headaches that worsen when upright and improve when lying flat, typically caused by cerebrospinal fluid (CSF) leakage, with common causes including dural puncture, spinal interventions, or spontaneous CSF leaks from dural tears, leaking meningeal diverticula, or CSF-venous fistulas 3, 4

The American College of Radiology recommends that the initial management of intracranial hypotension should focus on conservative measures for the first 72 hours, followed by an epidural blood patch (EBP) if symptoms persist, without the need for initial imaging studies 1, 2

If symptoms persist beyond 72 hours of conservative management, an epidural blood patch should be performed without the need for imaging studies, as recommended by the American College of Radiology 1, 2, 7
For post-dural puncture headaches, the EBP should be directed at the level of the known dural puncture, according to the American College of Radiology 1, 2
For spontaneous intracranial hypotension (SIH) where the leak site is unknown, a non-targeted high-volume EBP should be performed 3

Imaging is not typically indicated in the initial management of intracranial hypotension within 72 hours of dural puncture, as stated by the American College of Radiology 1, 2, 7
Imaging becomes necessary only if symptoms persist despite EBP or if spontaneous intracranial hypotension is suspected without a known cause 3, 4
Surgical intervention is rarely needed but may be considered for persistent symptomatic subdural collections with mass effect 3, 6

Subdural hematomas/hygromas (may require drainage if symptomatic with significant mass effect) 3, 6
Cerebral venous thrombosis (requires balancing anticoagulation with bleeding risk) 3
Superficial siderosis (long-term complication of persistent CSF leaks) 3, 5

Unnecessary imaging studies during the first 72 hours, which delay definitive treatment, as warned by the American College of Radiology 1, 2
Inadequate post-EBP instructions, leading to early recurrence of symptoms 5