Failed Foramen Magnum Decompression in Chiari I Malformation Is Associated With Failure to Restore Normal Intracranial Compliance: An Observational Cohort Study.

Background: The standard treatment for symptomatic Chiari malformation (CM) I is foramen magnum decompression (FMD) to facilitate cerebral spinal fluid flow through the foramen magnum, improve intracranial compliance, and alleviate symptoms (commonly headache). This procedure has a variable success rate, with a significant proportion of patients having persistent symptoms after surgery.

Objective: To investigate intracranial pressure (ICP) hydrodynamics in symptomatic surgery-naïve patients with CM I and symptomatic patients who have had prior FMD.

Association of Intracranial Pressure and Spontaneous Retinal Venous Pulsation.

Importance: A convenient and reliable method for noninvasive intracranial pressure assessments is desirable to reduce the need for invasive procedures (eg, intracranial pressure monitoring and lumbar punctures) and allow clinicians to identify and treat patients with intracranial hypertension in a timely manner.

Objective: To determine whether infrared video assessment of spontaneous retinal venous pulsation is associated with intracranial pressure and is a valid tool to indicate the presence or absence of raised intracranial pressure in patients without papilledema.

Design, Setting, And Participants: A single-center prospective study was conducted at a tertiary referral center between January 2017 and May 2018.