6.2 Core Workflows and Decision Points
Key Takeaways
- "Due regard" means an emergency vehicle operator must drive with the same care a reasonably prudent person would use, even when exempt from certain traffic laws.
- Lights and sirens only request the right of way; they never grant it, and the operator remains liable for a collision.
- Most intersection collisions are prevented by coming to a complete stop and clearing each lane before proceeding against a red light or stop sign.
- Air-medical transport is indicated when ground transport time, terrain, or critical-care needs make a helicopter clinically superior - not for routine stable patients.
- Set up the LZ at least 100 x 100 feet (ideally larger), on firm level ground, clear of wires and debris, and never approach the aircraft until the crew signals.
6.2 Ambulance and Transport Operations
More EMS providers are injured or killed in vehicle crashes than by almost any clinical hazard, so the NREMT tests safe transport operations heavily. The governing legal standard for emergency driving is due regard: the operator of an authorized emergency vehicle must drive with the same care a reasonably prudent person would exercise under similar circumstances, even while using statutory exemptions. Due regard is the yardstick a court uses after a crash.
Lights and sirens: a request, not a permission
State statutes allow an emergency vehicle (when using both lights AND siren) to exceed the speed limit, proceed past a red light or stop sign after slowing as necessary, and disregard posted turn/parking rules. But these are exemptions, not immunities. Warning devices only request the right of way; other drivers must yield, and many do not (the "wall effect," sirens masked by closed windows and stereos). If you cause a collision while driving recklessly, the exemptions evaporate and you are liable.
| Operating principle | Why it matters |
|---|---|
| Use lights AND siren together | Most statutes require both to claim exemptions |
| Come to a complete stop at red lights/stop signs | Intersections are the highest-crash location for ambulances |
| Clear each lane individually before proceeding | Cross traffic may not hear or see you |
| Slow to a safe speed in school zones/blind curves | Due regard is not suspended for any exemption |
| Avoid following another emergency vehicle closely | Second-due crews cause "piggyback" intersection crashes |
Drive defensively: assume other motorists will not yield, keep speed controlled (excessive speed lengthens stopping distance and worsens patient care in the box), and wear seatbelts in the captain's chair when possible.
The Transport Decision: Ground vs. Air
The transport decision balances destination (right hospital), mode (ground vs. air), and priority (emergent vs. routine). Choose the closest appropriate facility — a trauma center, STEMI/PCI center, or stroke center as the patient's condition dictates — not simply the nearest ED. Notify the receiving facility early so they can mobilize the cath lab, CT, or trauma team.
Air-medical (helicopter EMS) activation
A helicopter is requested when its critical-care capability or time savings clinically benefits the patient and ground transport would introduce harmful delay (long distances, entrapment, inaccessible terrain, or multiple critical patients). Per NAEMSP-style guidelines, common scene-activation triggers include:
- Estimated ground transport time to a trauma center substantially exceeds flight time.
- Physiologic instability: GCS < 13, SBP < 90, RR < 10 or > 29, or an intubated patient.
- Anatomic criteria: multisystem trauma, two or more body regions injured, suspected unstable/open pelvic fracture, amputation proximal to wrist/ankle, penetrating torso/head/neck injury.
- Mechanism plus need: ejection, prolonged extrication, or a critical patient where ground EMS cannot provide needed ALS/critical-care interventions.
Do not fly a patient who is in cardiac arrest (with rare exceptions), who can reach definitive care faster by ground, or whose condition is stable and minor. Weather, aircraft availability, and crew safety can also cancel a flight — the pilot has final authority and uses "3-to-go, 1-to-say-no" crew veto safety culture.
Landing Zone and Crew Safety
If you call for a helicopter, you must prepare a safe landing zone (LZ):
| LZ requirement | Standard |
|---|---|
| Size | Minimum 100 x 100 ft for most light/medium helicopters; larger (up to 125 x 125 ft) at night |
| Surface | Firm, level, low slope, free of loose debris (dust, gravel, snow can blind the pilot) |
| Hazards | Clear of overhead wires, poles, towers, trees, antennas - report any to the pilot |
| Marking | Mark corners with secured cones or vehicles with headlights angled at the LZ (never shine lights up at the aircraft) |
| Approach | Approach only from the front/sides in the pilot's view, from the downhill side, and only after the crew waves you in - never the tail-rotor area |
Keep bystanders back at least 200 feet, secure loose items (sheets, hats, gear) that rotor wash can launch, and protect the patient's eyes from debris.
Reading the exam stem
Transport questions hinge on the cue in the stem: a long rural transport time with an unstable trauma patient points to air transport; a stable patient a few minutes from the hospital points to ground. A patient meeting trauma-center criteria points to bypassing the local ED for the trauma center within the system's transport plan. When the stem says the scene is unsafe for landing or the weather is poor, the right answer is to transport by ground rather than force a flight. Always tie the mode to a measurable benefit for the patient, and document the rationale in the patient care report.
Transport priority and the receiving facility
Match the response and transport mode to acuity. An emergent (priority/Code 3) transport with lights and siren is reserved for patients whose condition is time-critical and where the minutes saved meaningfully change outcome; most stable patients are transported non-emergent (Code 1/2) because the small time savings of lights-and-siron transport does not justify the crash risk to crew, patient, and public.
Choosing the destination is a clinical decision governed by the system's transport protocol: a STEMI goes to a PCI-capable cardiac center, a suspected large-vessel stroke within the window goes to a designated stroke center, and major trauma goes to the highest-level trauma center that the transport plan allows you to reach in time. Early hospital notification (a concise radio report with age, chief complaint, vitals, interventions, and ETA) lets the receiving team mobilize the right resources before arrival.
Vehicle readiness and inspection
Operational readiness starts before the call. A daily rig check confirms fuel, fluids, tire condition, brakes, warning devices, oxygen levels, medication and equipment inventory, and the function of the stretcher and powered-load system. A unit that fails a safety check should be taken out of service rather than risked. On the exam, when a stem reveals a missing or expired piece of critical equipment or a vehicle defect, the defensible answer is to correct the deficiency or place the unit out of service — never to respond with known unsafe equipment.
While responding with lights and siren, a paramedic-driver approaches a red traffic light. What does "due regard" require?
Which patient situation is the strongest indication for helicopter (air-medical) transport from the scene?
What is the minimum recommended daytime landing-zone size for most EMS helicopters?