The Q-Collar is a C-shaped, externally-worn device that applies mild jugular compression according to the principle of the Queckenstedt maneuver. This maneuver obstructs venous return from the head, increasing the venous blood volume in the cranial cavity and simultaneously reducing the space for cerebrospinal fluid, which in turn increases the intracranial pressure.This action is proposed to reduce the slosh effect of a cranial impact. The Q-Collar is being developed for use to reduce incidence of mild traumatic brain injuring in collision sports.
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