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Code Blue Alarm: The Hospital Cardiac Arrest Alert System

Understanding the "Long Beep" and Response Protocol

The continuous, distinctive alarm tone broadcast overhead in hospitals is the Code Blue alarm—the universal signal for adult cardiac or respiratory arrest requiring immediate resuscitation.

Activation Criteria

  • Unresponsive, apneic, pulseless patient.
  • Witnessed or found arrest in-hospital.
  • Activated by any staff: bedside nurse, monitor tech, provider, family (via call button).

Code Blue Team Composition (Typical)

  • Team Leader: ICU/ED Attending, Hospitalist, Senior Resident.
  • Airway: Anesthesia/CRNA, RT, or trained MD.
  • Compressions: 2–3 Rotating rescuers (RN, Tech, Resident).
  • Medication/Access: ICU/ED RN (IV/IO, code cart drugs).
  • Documentation: RN (Code Narrator / Timer).
  • Recorder/Runner: Labs, blood gas, imaging, family liaison.

Sequence (ACLS Algorithm)

  1. Confirm unresponsiveness, activate Code Blue, start CPR (30:2).
  2. Attach monitor/defibrillator → Rhythm check.
  3. Shockable (VF/pVT) → Defibrillate 2J (biphasic) → CPR 2 min → Epinephrine 1mg q3–5 min → Amiodarone 300/150 mg.
  4. Non-shockable (PEA/Asystole) → CPR 2 min → Epinephrine q3–5 min → Treat reversible causes (H's & T's).
  5. ROSC → Post-cardiac arrest care (targeted temp, hemodynamics, coronary angiography, neuroprognostication).

Pediatric / Neonatal Equivalents

  • Code White / Code Pink: Pediatric/Neonatal arrest (team composition differs).
  • Rapid Response Team (RRT): For deterioration before arrest (early warning scores).

Family Presence

Evidence supports offering witnessed resuscitation. Designated support person (chaplain/SW) prepares and accompanies.

The Code Blue alarm mobilizes the hospital's highest-acuity resources. Every second of delay reduces survival by ~7–10%.

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