Trauma and Field Triage on the NREMT Paramedic Exam: The 2021 National Guideline

Trauma on the Paramedic test plan, and why triage reaches further

Trauma is the smallest domain on the National Registry Paramedic Certification Examination, at 6–10%, and like the other clinical domains it samples assessment, pathophysiology and management, with pediatric items integrated. Destination decisions for injured patients can also appear inside Clinical Judgment scenarios, where reassessment en route may change the answer. These are the Paramedic test plan's domains; the EMT exam uses a different blueprint.

The destination logic below comes from the 2021 National Guideline for the Field Triage of Injured Patients. A multidisciplinary panel led by the American College of Surgeons (ACS) wrote it, with support from the National Highway Traffic Safety Administration and the Health Resources and Services Administration's EMS for Children program. Your regional trauma plan and protocols decide where a real patient goes.

Red and yellow: what each tier means for the destination

The guideline groups its criteria into four boxes and two tiers:

Two features of the tiers are easy to miss:

• One criterion is enough. A patient who meets any single red criterion is red, whatever else looks reassuring.
• Red outranks yellow. Yellow criteria set the destination only when no red criterion is present.

Both tiers depend on the regional system. A patient in extremis, such as with an unmanageable airway, severe shock or traumatic arrest, may need the closest hospital for initial stabilization before definitive trauma care. Reassess that need during transport.

Red criteria from mental status and vital signs

These red criteria apply to all ages:

• Unable to follow commands (motor GCS below 6)
• Respiratory rate below 10 or above 29 breaths per minute
• Respiratory distress or a need for respiratory support
• Room-air pulse oximetry below 90%

The blood-pressure criteria change with age:

The injury-pattern group adds anatomic findings such as penetrating injuries to the head, neck or torso and suspected pelvic fractures. For the complete criteria and the official graphic, use the ACS guideline itself. The ACS asks that its criteria not be altered.

Working the age-based blood-pressure threshold

For children up to 9 years old, compute the threshold first, then compare:

The formula stops at 9. The examples below are fictional:

• A 9-year-old with a systolic pressure of 86 mm Hg is red, because 86 is below 88.
• A 10-year-old with the same 86 mm Hg is also red, but under a different rule: below 90.
• A 10-year-old with a systolic pressure of 96 and a heart rate of 110 is red, because the heart rate is greater than the systolic pressure.
• A 70-year-old with a systolic pressure of 104 mm Hg is red, because 104 is below 110, a reading that would not be red at age 40.

The guideline adds that children should be triaged preferentially to pediatric-capable centers. The free mixed set includes a pediatric blood-pressure item, so after you can compute the threshold without hesitating, work the pediatric blood-pressure triage item in a mixed NREMT Paramedic set →.

Yellow criteria: mechanism of injury

Mechanism criteria are yellow, not red. Examples from the guideline include:

• A high-risk auto crash
• A rider separated from the transport vehicle with significant impact, such as from a motorcycle, ATV or horse
• A pedestrian or bicycle rider thrown, run over, or hit with significant impact
• A fall from a height of more than 10 feet, for any age

A dramatic mechanism on its own does not make a patient red. If the vital signs, mental status and injury findings stay outside the red criteria, the yellow rule applies: a trauma center, not necessarily the highest level.

Yellow criteria: EMS judgment and risk factors

The EMS-judgment box asks you to consider risk factors. Among them:

• Low-level falls with significant head impact in young children (5 years or younger) or older adults (65 or older)
• Anticoagulant use
• Pregnancy beyond 20 weeks

A fictional example: a 4-year-old rolls off a high bed and strikes his head on a hard floor. He cries at once, follows commands, and his vital signs are outside every red threshold. No red criterion is met, but a low-level fall with significant head impact in a child 5 or younger is a listed risk factor. The guideline's yellow rule points to a trauma center, preferably one that is pediatric-capable.

The same reasoning applies to older adults, and the free set has an item on it. To test it, check the anticoagulant ground-level-fall item in the free NREMT Paramedic set →.

Reassessment can change the tier

The tier is not fixed at first contact. A patient triaged yellow for a mechanism who develops a red vital sign en route, such as a respiratory rate above 29 or room-air oxygen saturation below 90%, now meets a red criterion, and the destination question opens again under the regional plan. That evaluation step is a Clinical Judgment skill; the Clinical Judgment guide works a full case of it. For destination as a regional-system decision more broadly, see the EMS operations guide.

Why the 2011 four-step scheme is out of date

Older textbooks and question banks teach the 2011 field triage guideline, published by CDC in MMWR in January 2012, with four steps: physiologic, anatomic, mechanism of injury and special considerations. CDC's page now says it will no longer update those guidelines and that the ACS guidelines supersede them. If your study material uses four steps instead of red and yellow tiers, it predates the 2021 guideline. The pediatrics guide covers the pediatric side of trauma care.