TNCC 2026 COMPLETE STUDY GUIDE
SECTION 1: TRAUMA EPIDEMIOLOGY &
KINEMATICS
CHAPTER OVERVIEW
After completing this chapter, you should be able to:
✓ Explain trauma epidemiology
✓ Identify major causes of traumatic injury
✓ Describe the principles of kinematics
✓ Predict injury patterns based on the mechanism of injury (MOI)
✓ Apply kinematic concepts during trauma assessment
✓ Recognize high-risk trauma scenarios commonly tested in TNCC
KEY EXAM FACT
TNCC emphasizes that understanding the mechanism of injury allows the nurse to anticipate
injuries before they are visible.
Remember:
MOI = Clues to Hidden Injuries
1. WHAT IS TRAUMA EPIDEMIOLOGY?
Trauma epidemiology is the study of:
Who gets injured
How injuries occur
Why injuries occur
The outcomes of injuries
,It helps healthcare providers:
Identify risk factors
Develop prevention strategies
Improve trauma care
TNCC PEARL
Trauma remains one of the leading causes of death and disability worldwide.
The majority of preventable trauma deaths occur because of:
1. Airway compromise
2. Uncontrolled hemorrhage
3. Traumatic brain injury
Exam Tip:
When in doubt:
Airway + Bleeding = Immediate Priority
THE TRAUMA TRIAD OF DEATH
A favorite TNCC concept.
1. Hypothermia
Body temperature falls below normal.
Consequences:
Impaired clotting
Increased bleeding
Poor tissue perfusion
2. Acidosis
Occurs because tissues are not receiving enough oxygen.
Signs:
Increased lactate
Poor organ perfusion
,3. Coagulopathy
Failure of blood to clot effectively.
Results:
Continued hemorrhage
Increased mortality
MEMORY TRICK
Think:
COLD → ACID → BLEED
Hypothermia → Acidosis → Coagulopathy
Once the cycle begins, the patient deteriorates rapidly.
2. UNDERSTANDING KINEMATICS
Definition
Kinematics is the study of:
How energy transfer causes injury.
In trauma nursing, energy transfer predicts injury severity.
GOLDEN RULE OF KINEMATICS
ENERGY CANNOT BE DESTROYED
It is only transferred.
During trauma:
Energy transfers from:
Vehicle → Patient
, Bullet → Tissue
Ground → Body
This transfer causes injury.
TNCC EXAM PEARL
Greater energy transfer = Greater tissue damage
TYPES OF ENERGY
Mechanical Energy
Most common in trauma.
Examples:
Motor vehicle crashes
Falls
Assaults
Thermal Energy
Examples:
Burns
Fires
Explosions
Chemical Energy
Examples:
Acid burns
Alkali burns
SECTION 1: TRAUMA EPIDEMIOLOGY &
KINEMATICS
CHAPTER OVERVIEW
After completing this chapter, you should be able to:
✓ Explain trauma epidemiology
✓ Identify major causes of traumatic injury
✓ Describe the principles of kinematics
✓ Predict injury patterns based on the mechanism of injury (MOI)
✓ Apply kinematic concepts during trauma assessment
✓ Recognize high-risk trauma scenarios commonly tested in TNCC
KEY EXAM FACT
TNCC emphasizes that understanding the mechanism of injury allows the nurse to anticipate
injuries before they are visible.
Remember:
MOI = Clues to Hidden Injuries
1. WHAT IS TRAUMA EPIDEMIOLOGY?
Trauma epidemiology is the study of:
Who gets injured
How injuries occur
Why injuries occur
The outcomes of injuries
,It helps healthcare providers:
Identify risk factors
Develop prevention strategies
Improve trauma care
TNCC PEARL
Trauma remains one of the leading causes of death and disability worldwide.
The majority of preventable trauma deaths occur because of:
1. Airway compromise
2. Uncontrolled hemorrhage
3. Traumatic brain injury
Exam Tip:
When in doubt:
Airway + Bleeding = Immediate Priority
THE TRAUMA TRIAD OF DEATH
A favorite TNCC concept.
1. Hypothermia
Body temperature falls below normal.
Consequences:
Impaired clotting
Increased bleeding
Poor tissue perfusion
2. Acidosis
Occurs because tissues are not receiving enough oxygen.
Signs:
Increased lactate
Poor organ perfusion
,3. Coagulopathy
Failure of blood to clot effectively.
Results:
Continued hemorrhage
Increased mortality
MEMORY TRICK
Think:
COLD → ACID → BLEED
Hypothermia → Acidosis → Coagulopathy
Once the cycle begins, the patient deteriorates rapidly.
2. UNDERSTANDING KINEMATICS
Definition
Kinematics is the study of:
How energy transfer causes injury.
In trauma nursing, energy transfer predicts injury severity.
GOLDEN RULE OF KINEMATICS
ENERGY CANNOT BE DESTROYED
It is only transferred.
During trauma:
Energy transfers from:
Vehicle → Patient
, Bullet → Tissue
Ground → Body
This transfer causes injury.
TNCC EXAM PEARL
Greater energy transfer = Greater tissue damage
TYPES OF ENERGY
Mechanical Energy
Most common in trauma.
Examples:
Motor vehicle crashes
Falls
Assaults
Thermal Energy
Examples:
Burns
Fires
Explosions
Chemical Energy
Examples:
Acid burns
Alkali burns
