Participants not enrolled due to interest in the project

The investigators hypothesize that the Q-collar compression on bilateral internal jugular veins of patients with low pressure hydrocephalus will decrease venous drainage from the intracranial space, therefore increasing intracranial volume, decreasing brain compliance, and increasing CSF drainage through the shunt. This should improve persistent hydrocephalus symptoms and demonstrate improved ventricular drainage on imaging with decompressed ventricles.

Low-pressure hydrocephalus is an entity that is rare and difficult to manage. At this institution, Dr. Paul Camarata uses a method of "neck-wrapping" in those low-pressure hydrocephalus patients that were admitted for complications with their shunt, hypothesized to decrease venous outflow from the intracranial space, increase venous pressure within the cranium and therefore increase the turgor in the brain tissue allowing for CSF to more easily be pushed out of the ventricular space and through the drain. This would relieve the hydrocephalus symptoms and reduce ventricular size on imaging. The advent of the Q-collar for reducing TBI in contact sports functions in a similar way to the "neck-wrapping" used at this institution, but via the simplified tool of the collar. It functions by compressing the internal jugular veins bilaterally to increase intracranial volume and prevent "brain slosh" that can occur in contact sports that leads to brain injury. The collar in contrast to the neck wrap occupies a smaller surface area, which the investigators hypothesize will reduce the discomfort that is commonly associated with neck wrap. Furthermore, applying this Q-collar to low pressure hydrocephalus patients that struggle with symptom management while inpatient, the investigators hypothesize that CSF drainage will improve with wearing the collar via increased intracranial volume and lower brain compliance, therefore improving persistent hydrocephalus symptoms that are limiting on patient quality of life.

Inclusion Criteria:

• adult with low-pressure hydrocephalus, able to cranial imaging, able to provide consent or have surrogate decision maker that is able to provide it for them

Exclusion Criteria:

• pediatric patients, patients that can't consent or don't have a surrogate decision maker, patients that can't get cranial imaging