Patient Population: Patients with life threatening conditions related to major elective and emergency surgical procedures, multiple traumas, traumatic brain injury, spinal injury, stroke, patients with sepsis / multi-organ system failure, and hemodynamic instability. Type of equipment: ICP monitoring, EVD management, spinal drains/catheters, arctic sun therapy, continuous EEG, non-invasive cardiac output, wound vac and mechanical ventilators, Heimlich drains.