You are a healthcare provider working on an ALS ambulance. You receive a call from dispatch advising you that an individual witnessed their 70-year-old female neighbour collapse outside their home. The bystander has begun providing CPR. Your response time to the scene is 4 min. A rapid initial assessment reveals the following:
Vital signs
Pulse rate: Unobtainable
Blood pressure: Unobtainable
Respiratory rate: Unobtainable
Temperature: Unobtainable
Physiological systems
Integumentary: Cold, cyanotic
Cardiovascular: No palpable pulse
Respiratory: No audible respiration, no visible chest rising
