Tourniquet Management

SOC → SCF-DBI Logic Translation

Purpose

Tourniquet Management is the application, monitoring, optimization, and controlled removal of a tourniquet used to stop life-threatening extremity hemorrhage while minimizing ischemic injury and maximizing limb salvage.

In trauma care, the tourniquet is one of the most effective hemorrhage-control interventions for preventing death from exsanguination.

However, SCF-DBI recognizes that successful hemorrhage control simultaneously initiates:

• Regional ischemia
• Endothelial stress
• Neuromuscular injury risk
• Reperfusion injury risk
• Metabolic burden accumulation

Therefore tourniquet management extends far beyond simple hemorrhage control.

SOC Definition

Clinical Objective

Control extremity hemorrhage through:

• Arterial flow interruption
• Venous flow interruption
• Temporary limb isolation
• Prevention of exsanguination

Common Indications

Extremity Trauma

• Penetrating injury
• Blast injury
• Amputation
• Mangled extremity

Catastrophic Hemorrhage

• Junctional-to-extremity extension
• Massive vascular injury
• Uncontrolled arterial bleeding

Prehospital Damage Control

• Tactical medicine
• Combat casualty care
• Remote environments

SCF-DBI Translation

Core Concept

SOC views Tourniquet Management as:

Mechanical occlusion of extremity blood flow to stop hemorrhage.

SCF-DBI views Tourniquet Management as:

Controlled Regional Perfusion Suspension with Dynamic Limb Viability Preservation.

The goal is not simply stopping blood loss.

The goal is preserving:

1. Life
2. Limb viability
3. Neuromuscular integrity
4. Endothelial health
5. Regenerative potential
6. Functional recovery

SCF-DBI Tourniquet Architecture

Domain 1

Controlled Perfusion Suspension

SOC Focus

Stop bleeding.

SCF-DBI Focus

Manage intentional interruption of regional circulation.

Physiologic Cascade

Tourniquet application

↓

Hemorrhage cessation

↓

Regional ischemia

↓

Oxygen debt accumulation

↓

Metabolic stress

↓

Neuromuscular vulnerability

↓

Reperfusion risk

SCF Classification

Controlled Regional Perfusion Suspension Syndrome (CRPSS)

A temporary physiologic state where limb circulation is intentionally interrupted to preserve systemic survival.

Output

Perfusion Suspension Severity Score (PSSS)

Domain 2

Neurometabolic Ischemia-Reperfusion Dashboard

Major SCF-DBI Enhancement

Selected Enhancement:

Neurometabolic Ischemia-Reperfusion Dashboard

This becomes the principal SCF-DBI enhancement for Tourniquet Management.

Rationale

SOC typically monitors:

• Tourniquet placement
• Tourniquet time
• Bleeding control

SCF-DBI monitors:

Real-Time Limb Survival Biology

including:

• Neural viability
• Metabolic burden
• Tissue oxygen debt
• Reperfusion vulnerability

Dashboard Domains

Neural Status

Metabolic Status

Reperfusion Status

Dashboard States

Output

Neurometabolic Ischemia-Reperfusion Index (NIRI)

Domain 3

Limb Viability Intelligence

SCF-DBI Enhancement

Tourniquet success is not measured solely by hemorrhage control.

Success depends upon preservation of viable tissue.

Assessment Domains

Output

Limb Viability Preservation Score (LVPS)

Domain 4

Endothelial Preservation Mapping

SCF-DBI Enhancement

Prolonged ischemia may produce:

• Glycocalyx injury
• Endothelial dysfunction
• Capillary leak
• Microvascular collapse

Assessment Domains

Output

Endothelial Preservation Score (EPS-T)

Domain 5

Ischemia Clock Management

SCF-DBI Enhancement

Tourniquet duration is transformed into a dynamic biologic model.

Assessment Domains

Ischemia States

Output

Dynamic Ischemia Burden Score (DIBS)

Domain 6

Reperfusion Injury Prediction Engine

SCF-DBI Enhancement

Tourniquet removal creates a second injury phase.

Reperfusion Risks

• Hyperkalemia
• Acidosis
• Rhabdomyolysis
• Systemic inflammatory activation
• Acute kidney injury
• Compartment syndrome

Assessment Domains

Output

Reperfusion Injury Risk Index (RIRI-TM)

Domain 7

Functional Limb Recovery Mapping

SCF-DBI Enhancement

The final objective is restoration of a functional extremity.

Assessment Domains

Output

Functional Limb Recovery Score (FLRS)

RHENOVA Integration

R1 — Survival Preservation

Control:

• Exsanguination
• Hemorrhagic shock
• Perfusion collapse

Output:

Hemorrhage Rescue Status

R2 — Recovery Optimization

Minimize:

• Ischemic burden
• Metabolic stress
• Neuromuscular injury

Output:

Recovery Readiness Score

R3 — Regenerative Preservation

Protect:

• Endothelium
• Nerves
• Muscle architecture

Output:

Limb Regeneration Profile

R4 — Functional Restoration

Restore:

• Perfusion
• Motor function
• Sensory function

Output:

Limb Restoration Matrix

R5 — Long-Term Resilience

Prevent:

• Limb dysfunction
• Chronic pain
• Neuropathy
• Functional disability

Output:

Limb Resilience Profile

SCF-DBI Tourniquet Management Workflow

Step 1

Identify life-threatening extremity hemorrhage.

Output

Perfusion Suspension Severity Score

Step 2

Apply tourniquet and achieve hemorrhage control.

Output

Hemorrhage Control Confirmation

Step 3

Activate Neurometabolic Ischemia-Reperfusion Dashboard.

Output

Neurometabolic Ischemia-Reperfusion Index (NIRI)

Step 4

Assess limb viability.

Output

Limb Viability Preservation Score

Step 5

Monitor endothelial preservation.

Output

Endothelial Preservation Score

Step 6

Track ischemia burden.

Output

Dynamic Ischemia Burden Score

Step 7

Model reperfusion injury risk.

Output

Reperfusion Injury Risk Index

Step 8

Perform controlled reperfusion and recovery monitoring.

Output

Functional Limb Recovery Score

Glossary

SCF Principle Alignment

INDEX

SCF-SURG-TOURNIQUET-MANAGEMENT-0001

SCF-DBI-CONTROLLED-REGIONAL-PERFUSION-SUSPENSION-SYNDROME-0001

SCF-DBI-NEUROMETABOLIC-ISCHEMIA-REPERFUSION-DASHBOARD-0001

SCF-DBI-LIMB-VIABILITY-PRESERVATION-SCORE-0001

SCF-DBI-DYNAMIC-ISCHEMIA-BURDEN-SCORE-0001

SCF-DBI-REPERFUSION-INJURY-RISK-INDEX-TM-0001

SCF-DBI-FUNCTIONAL-LIMB-RECOVERY-SCORE-0001

SCF-EXTREMITY-HEMORRHAGE-CONTROL-WORKFLOW-0036

SCF-TOURNIQUET-MANAGEMENT-MASTER-0001