MTP Activation Criteria

Emergency Only: Activation of Massive Transfusion Protocol (MTP) is a system-wide resource-intensive event. Use only in cases of life-threatening hemorrhage.

1. Clinical Gestalt

2. ABC Score (Assessment of Blood Consumption)

Awaiting Thresholds

ABC Score: 0

Guidelines & Evidence

Verified

Last Review: 2026-07-17

When to Use

When to Activate

Suspected or confirmed massive hemorrhage requiring immediate life-saving transfusion.

Uncontrolled hemorrhage in trauma, obstetric, or surgical settings.

Initial response to fluid resuscitation is inadequate (transient or non-responder).

The Definition

Massive transfusion is typically defined as the replacement of > 10 units of RBCs within 24 hours, or > 4 units within 1 hour.

How it Works

ABC Activation Score (Points)

Criterion	Points
Penetrating Trauma Mechanism	1
Systolic Blood Pressure ≤ 90 mmHg	1
Heart Rate ≥ 120 bpm	1
Positive FAST (Free Fluid on Ultrasound)	1

Interpretation

Total ABC Score ≥ 2: Activate MTP (Sn: 75%, Sp: 86%).

Clinical Gestalt: Massive visible bleeding or exsanguination is an automatic trigger regardless of score.

Last Comprehensive Review: 2026-07-17

In Recent Clinical News

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MTP Activation Criteria

When to Use

When to Activate

The Definition

How it Works

ABC Activation Score (Points)

Interpretation

Clinical Pearls

The 1:1:1 Ratio

TXA Timing

The Evidence

Primary Strategy

Early prediction of massive transfusion in trauma: simple as ABC.

Transfusion of plasma, platelets, and red blood cells in a 1:1:1 vs a 1:1:2 ratio and mortality in patients with severe trauma and major hemorrhage.

Origins & History

Standard Standards

In Recent Clinical News

MTP Activation Criteria

When to Use

When to Activate

The Definition

How it Works

ABC Activation Score (Points)

Interpretation

Clinical Pearls

The 1:1:1 Ratio

TXA Timing

The Evidence

Primary Strategy

Early prediction of massive transfusion in trauma: simple as ABC.

Transfusion of plasma, platelets, and red blood cells in a 1:1:1 vs a 1:1:2 ratio and mortality in patients with severe trauma and major hemorrhage.

Origins & History

Standard Standards

In Recent Clinical News