What Is the Primary Purpose of Documentation in Emergency Nursing

a 45-year-old Male Patient Is Brought to the Emergency Department with Complaints of Severe Chest Pain Radiating to His Left Arm. He Appears Diaphoretic and Anxious. Vital Signs Are as Follows: Blood Pressure 160/100 Mmhg, Heart Rate 110 Bpm, Respiratory Rate 22 Bpm and Oxygen Saturation 95% on Room Air