All EMS presentations
TraumaClinical presentation

Motor vehicle collision

A streamlined, differential-led presentation for rapid clinical review.

Clinical snapshot

Twenty-second review

  • Motor-vehicle injury reflects energy transfer through acceleration, deceleration, compression, and intrusion, producing occult multisystem injury despite minimal external damage.
  • Unstable physiology, entrapment, major intrusion, ejection, chest or abdominal signs, neurologic deficit, or anticoagulation raises trauma priority.
  • Keep medical event before collision in the differential; overlapping or concurrent illness remains possible.
  • For motor vehicle collision, trends and combinations of findings are more informative than one isolated vital sign.
Differentials

Compare the clinical patterns

The repeated material is grouped inside each possibility. Open only the condition you need.

Serious3 conditions
Internal hemorrhageTime-sensitive high-risk possibility

HPI

Clarify collision type/speed; restrained; airbag.

Signs & symptoms

Shock, dyspnea, abdominal tenderness, neurologic deficit, or distracting injury.

Focused exam

Expose only as needed, inspect and palpate systematically, and document distal circulation, sensation, and movement; Reassess pain, swelling, perfusion, and neurologic status after movement or intervention.

Brief pathophysiology

Internal hemorrhage may cause motor vehicle collision through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

Hemorrhage is a trend diagnosis: tachycardia and narrowing pulse pressure may precede hypotension. Age, pregnancy, medications, and pacing can blunt expected responses.

Heart rate (bpm)

Often rises

Tachycardia is a common compensatory response but may be absent.

Pulse pressure (mmHg)

May narrow

Narrowing pulse pressure can reflect reduced stroke volume.

Blood pressure (mmHg)

May fall late

A normal pressure does not exclude significant compensated hemorrhage.

MAP (mmHg)

May fall

A falling trend supports worsening perfusion; interpret with mental status and skin signs.

Front-load in the triage report

  • Internal hemorrhage: Shock, dyspnea, abdominal tenderness, neurologic deficit, or distracting injury.
  • Collision type/speed.
  • Restrained?
Thoracic injuryTime-sensitive high-risk possibility

HPI

Clarify restrained; airbag; intrusion.

Signs & symptoms

Shock, dyspnea, abdominal tenderness, neurologic deficit, or distracting injury.

Focused exam

Reassess pain, swelling, perfusion, and neurologic status after movement or intervention; Perform a systematic trauma examination including chest, abdomen, pelvis, spine, neurologic status, long bones, and distal CSM.

Brief pathophysiology

Thoracic injury may cause motor vehicle collision through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

Isolated injury may have normal observations. Serial heart rate, pressure, respiratory status, and oxygenation help identify occult hemorrhage or thoracic injury.

Heart rate (bpm)

May rise

Pain, distress, and hemorrhage can increase rate; medications can blunt it.

Blood pressure (mmHg)

May fall late

A normal pressure does not exclude compensated hemorrhage.

Respiratory rate (breaths/min)

Trend rate / effort

Tachypnea may reflect pain, thoracic injury, shock, or acidosis.

Oxygen saturation (SpO₂)

Usually preserved

Low saturation suggests thoracic injury, hypoventilation, or concurrent disease.

Front-load in the triage report

  • Thoracic injury: Shock, dyspnea, abdominal tenderness, neurologic deficit, or distracting injury.
  • Restrained?
  • Airbag?
Spinal injuryTime-sensitive high-risk possibility

HPI

Clarify airbag; intrusion; rollover/ejection.

Signs & symptoms

Shock, dyspnea, abdominal tenderness, neurologic deficit, or distracting injury.

Focused exam

Reassess pain, swelling, perfusion, and neurologic status after movement or intervention; Perform a systematic trauma examination including chest, abdomen, pelvis, spine, neurologic status, long bones, and distal CSM.

Brief pathophysiology

Spinal injury may cause motor vehicle collision through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

Isolated injury may have normal observations. Serial heart rate, pressure, respiratory status, and oxygenation help identify occult hemorrhage or thoracic injury.

Heart rate (bpm)

May rise

Pain, distress, and hemorrhage can increase rate; medications can blunt it.

Blood pressure (mmHg)

May fall late

A normal pressure does not exclude compensated hemorrhage.

Respiratory rate (breaths/min)

Trend rate / effort

Tachypnea may reflect pain, thoracic injury, shock, or acidosis.

Oxygen saturation (SpO₂)

Usually preserved

Low saturation suggests thoracic injury, hypoventilation, or concurrent disease.

Front-load in the triage report

  • Spinal injury: Shock, dyspnea, abdominal tenderness, neurologic deficit, or distracting injury.
  • Airbag?
  • Intrusion?
Common2 conditions
Blunt soft-tissueCommon presentation pattern

HPI

Clarify collision type/speed; restrained; airbag.

Signs & symptoms

Localized pain and tenderness may match the restraint or impact pattern.

Focused exam

Expose only as needed, inspect and palpate systematically, and document distal circulation, sensation, and movement; Reassess pain, swelling, perfusion, and neurologic status after movement or intervention.

Brief pathophysiology

Blunt soft-tissue may explain the presenting symptoms through a common clinical mechanism, while serial assessment checks for complications or an alternate cause.

Vital-sign pattern

What the trend may show

Possible pattern

Isolated musculoskeletal injury often leaves central vital signs near baseline. Persistent abnormality should prompt reassessment for hemorrhage, thoracic injury, infection, or a medical cause.

Heart rate (bpm)

May rise with pain

Tachycardia can reflect pain or distress; trend after treatment.

Blood pressure (mmHg)

May rise with pain

Hypotension is not expected in an isolated minor injury.

Respiratory rate (breaths/min)

May rise with pain

Persistent tachypnea suggests more than a minor isolated injury.

Oxygen saturation (SpO₂)

Usually preserved

Desaturation suggests thoracic injury or concurrent disease.

Front-load in the triage report

  • Localized pain and tenderness may match the restraint or impact pattern.
  • Collision type/speed.
  • Restrained?
Musculoskeletal injuryCommon presentation pattern

HPI

Clarify restrained; airbag; intrusion.

Signs & symptoms

Localized pain and tenderness may match the restraint or impact pattern.

Focused exam

Reassess pain, swelling, perfusion, and neurologic status after movement or intervention; Perform a systematic trauma examination including chest, abdomen, pelvis, spine, neurologic status, long bones, and distal CSM.

Brief pathophysiology

Musculoskeletal injury may explain the presenting symptoms through a common clinical mechanism, while serial assessment checks for complications or an alternate cause.

Vital-sign pattern

What the trend may show

Possible pattern

Isolated musculoskeletal injury often leaves central vital signs near baseline. Persistent abnormality should prompt reassessment for hemorrhage, thoracic injury, infection, or a medical cause.

Heart rate (bpm)

May rise with pain

Tachycardia can reflect pain or distress; trend after treatment.

Blood pressure (mmHg)

May rise with pain

Hypotension is not expected in an isolated minor injury.

Respiratory rate (breaths/min)

May rise with pain

Persistent tachypnea suggests more than a minor isolated injury.

Oxygen saturation (SpO₂)

Usually preserved

Desaturation suggests thoracic injury or concurrent disease.

Front-load in the triage report

  • Localized pain and tenderness may match the restraint or impact pattern.
  • Restrained?
  • Airbag?
Mimics1 condition
Medical event before collisionImportant alternative presentation

HPI

Clarify collision type/speed; restrained; airbag.

Signs & symptoms

Syncope, seizure, hypoglycemia, or intoxication may have caused the crash.

Focused exam

Expose only as needed, inspect and palpate systematically, and document distal circulation, sensation, and movement; Reassess pain, swelling, perfusion, and neurologic status after movement or intervention.

Brief pathophysiology

Medical event before collision can resemble motor vehicle collision through overlapping symptoms or referred physiology despite a different primary mechanism.

Vital-sign pattern

What the trend may show

Possible pattern

Isolated injury may have normal observations. Serial heart rate, pressure, respiratory status, and oxygenation help identify occult hemorrhage or thoracic injury.

Heart rate (bpm)

May rise

Pain, distress, and hemorrhage can increase rate; medications can blunt it.

Blood pressure (mmHg)

May fall late

A normal pressure does not exclude compensated hemorrhage.

Respiratory rate (breaths/min)

Trend rate / effort

Tachypnea may reflect pain, thoracic injury, shock, or acidosis.

Oxygen saturation (SpO₂)

Usually preserved

Low saturation suggests thoracic injury, hypoventilation, or concurrent disease.

Front-load in the triage report

  • Syncope, seizure, hypoglycemia, or intoxication may have caused the crash.
  • Collision type/speed.
  • Restrained?
Red flags

Findings that should escalate concern

  • Unstable physiology, entrapment, major intrusion, ejection, chest or abdominal signs, neurologic deficit, or anticoagulation raises trauma priority.
  • Internal hemorrhage, thoracic injury, or spinal injury: Shock, dyspnea, abdominal tenderness, neurologic deficit, or distracting injury.
Related EMS presentations

Continue the clinical pathway

TraumaHead injuryTraumaExtremity injury / suspected fractureTraumaChest traumaTraumaAbdominal traumaTraumaSuspected spinal injury
References

Clinical and academic sources

Curated clinical guidance and peer-reviewed evidence supporting this presentation. Current BCEHS guidance, medical direction, and local policy remain authoritative for practice.

BCEHS Handbook — specific CPGs

  1. H01: Principles of Major TraumaBC Emergency Health Services Handbook

    Official BCEHS clinical practice guidance for principles of major trauma.

Supporting clinical and academic evidence

  1. CEDIS Presenting Complaint List updateCanadian Association of Emergency Physicians

    Presenting-complaint terminology and categorization context. It does not establish a prehospital “top 100” ranking.

  2. Major trauma: assessment and initial managementNational Institute for Health and Care Excellence

    Evidence-based initial assessment, hemorrhage control, imaging, and trauma-system guidance.

  3. Guidelines for Enhanced Recovery After Trauma and Intensive Care: Initial CareWorld Journal of Surgery · 2025

    Initial trauma assessment, hemorrhage recognition, resuscitation, and time-sensitive injury care.