Advanced Life Support (ALS)

What Is Advanced Life Support (ALS)?

Advanced Life Support (ALS) is the highest level of prehospital emergency medical care, provided by paramedics and, in some systems, specially trained EMTs or EMS physicians. It builds on Basic Life Support (BLS) skills by adding invasive and pharmacological interventions: IV/IO access, cardiac monitoring and 12-lead ECG interpretation, advanced airway management, manual defibrillation and cardioversion, and administration of medications such as epinephrine, amiodarone, naloxone, and analgesics. ALS units are typically dispatched to cardiac arrests, severe trauma, respiratory distress, stroke, and other calls where a patient's condition may deteriorate quickly and BLS-level care alone isn't sufficient.

Why Advanced Life Support (ALS) Matters on the Fireground

Whether a call is dispatched as BLS or ALS determines what interventions can legally and clinically be performed on scene and who needs to respond. For fire departments that run first-responder EMS alongside a separate ALS transport unit, knowing the ALS/BLS distinction affects triage decisions, mutual aid requests, and how quickly a critical patient gets advanced care versus waiting on a paramedic unit.

Relevant NFPA Standards

• NFPA 455: Standard for Emergency Medical Services (EMS)
• NREMT Standards: National Registry of Emergency Medical Technicians Paramedic Practice Standards

Field Procedures & Tactical Steps

1. Determine whether the call requires ALS-level care based on dispatch information and initial patient presentation; request ALS intercept or upgrade early if BLS crews arrive first and identify a critical patient.
2. Establish IV or IO access as indicated for fluid resuscitation or medication administration.
3. Apply cardiac monitoring and obtain a 12-lead ECG when cardiac involvement is suspected, transmitting results to medical control if indicated.
4. Administer medications per protocol, verifying dose, route, and contraindications before giving anything.
5. Continuously reassess vitals (BP, HR, SpO2, ETCO2) and adjust treatment en route to the receiving facility.

Common Context & Application

Referenced whenever a call is dispatched or upgraded to ALS level — cardiac arrests, chest pain, major trauma, respiratory failure, and stroke — and during mutual aid coordination between BLS-only fire engines and ALS ambulances or paramedic intercept units.

Frequently Asked Questions about Advanced Life Support (ALS)