High acuity, low occurrence (HALO) events demand immediate interventions. This reference card supports your rapid decision-making and treatment in those high-pressure situations. Get just-in-time reminders for the steps of some of the most critical HALO procedures, including: Pericardiocentesis Fiberoptic intubation Cricothyrotomy GI bleeds (Blakemore and Minnesota tubes) Resuscitative thoracotomy Transvenous pacemaker placement Chest tubes Obstetric emergencies (precipitous and breach delivery, resuscitative hysterotomy) Umbilical vein catheters Neonatal resuscitation Canthotomy Compartment pressure This resource is geared for bedside use wherever emergency care is provided: hospitals, freestanding ERs, urgent care centers, EMS, prehospital care, tactical medicine. New and experienced clinicians alike can keep this in their pocket for quick reference in high-pressure situations.