Laceration / external hemorrhage
A streamlined, differential-led presentation for rapid clinical review.
Twenty-second review
- Lacerations disrupt skin and may injure arteries, nerves, tendons, joints, or deeper structures; blood loss and contamination determine systemic risk.
- Uncontrolled hemorrhage, arterial bleeding, neurovascular loss, deep penetration, amputation, or shock requires immediate escalation.
- Keep occult penetrating injury in the differential; overlapping or concurrent illness remains possible.
- For laceration / external hemorrhage, trends and combinations of findings are more informative than one isolated vital sign.
Compare the clinical patterns
The repeated material is grouped inside each possibility. Open only the condition you need.
Major vascularTime-sensitive high-risk possibility
HPI
Clarify location/mechanism; active bleeding; approximate blood loss.
Signs & symptoms
Pulsatile bleeding, expanding hematoma, weakness, numbness, or impaired movement.
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
Major vascular may cause laceration / external hemorrhage through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
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 risesTachycardia is a common compensatory response but may be absent.
Pulse pressure (mmHg)
May narrowNarrowing pulse pressure can reflect reduced stroke volume.
Blood pressure (mmHg)
May fall lateA normal pressure does not exclude significant compensated hemorrhage.
MAP (mmHg)
May fallA falling trend supports worsening perfusion; interpret with mental status and skin signs.
Front-load in the triage report
- Major vascular: Pulsatile bleeding, expanding hematoma, weakness, numbness, or impaired movement.
- Location/mechanism.
- Active bleeding?
Tendon injuryTime-sensitive high-risk possibility
HPI
Clarify active bleeding; approximate blood loss; anticoagulant/bleeding disorder.
Signs & symptoms
Pulsatile bleeding, expanding hematoma, weakness, numbness, or impaired movement.
Focused exam
Reassess pain, swelling, perfusion, and neurologic status after movement or intervention; Expose the wound, assess depth and contamination without blind probing, and document distal CSM and tendon function when safe.
Brief pathophysiology
Tendon injury may cause laceration / external hemorrhage through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
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 risesTachycardia is a common compensatory response but may be absent.
Pulse pressure (mmHg)
May narrowNarrowing pulse pressure can reflect reduced stroke volume.
Blood pressure (mmHg)
May fall lateA normal pressure does not exclude significant compensated hemorrhage.
MAP (mmHg)
May fallA falling trend supports worsening perfusion; interpret with mental status and skin signs.
Front-load in the triage report
- Tendon injury: Pulsatile bleeding, expanding hematoma, weakness, numbness, or impaired movement.
- Active bleeding?
- Approximate blood loss.
Simple lacerationCommon presentation pattern
HPI
Clarify location/mechanism; active bleeding; approximate blood loss.
Signs & symptoms
Localized skin injury with controlled bleeding and preserved deeper function.
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
Simple laceration may explain the presenting symptoms through a common clinical mechanism, while serial assessment checks for complications or an alternate cause.
What the trend may show
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 painTachycardia can reflect pain or distress; trend after treatment.
Blood pressure (mmHg)
May rise with painHypotension is not expected in an isolated minor injury.
Respiratory rate (breaths/min)
May rise with painPersistent tachypnea suggests more than a minor isolated injury.
Oxygen saturation (SpO₂)
Usually preservedDesaturation suggests thoracic injury or concurrent disease.
Front-load in the triage report
- Localized skin injury with controlled bleeding and preserved deeper function.
- Location/mechanism.
- Active bleeding?
Occult penetrating injuryImportant alternative presentation
HPI
Clarify location/mechanism; active bleeding; approximate blood loss.
Signs & symptoms
Small skin wounds can conceal deep tract or foreign body.
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
Occult penetrating injury can resemble laceration / external hemorrhage through overlapping symptoms or referred physiology despite a different primary mechanism.
What the trend may show
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 risesTachycardia is a common compensatory response but may be absent.
Pulse pressure (mmHg)
May narrowNarrowing pulse pressure can reflect reduced stroke volume.
Blood pressure (mmHg)
May fall lateA normal pressure does not exclude significant compensated hemorrhage.
MAP (mmHg)
May fallA falling trend supports worsening perfusion; interpret with mental status and skin signs.
Front-load in the triage report
- Small skin wounds can conceal deep tract or foreign body.
- Location/mechanism.
- Active bleeding?
Findings that should escalate concern
- Uncontrolled hemorrhage, arterial bleeding, neurovascular loss, deep penetration, amputation, or shock requires immediate escalation.
- Major vascular or tendon injury: Pulsatile bleeding, expanding hematoma, weakness, numbness, or impaired movement.
Medication recognition
Continue the clinical pathway
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
- D02: BleedingBC Emergency Health Services Handbook
Official BCEHS clinical practice guidance for bleeding.
- H13: Soft Tissue TraumaBC Emergency Health Services Handbook
Official BCEHS clinical practice guidance for soft tissue trauma.
Supporting clinical and academic evidence
- CEDIS Presenting Complaint List updateCanadian Association of Emergency Physicians
Presenting-complaint terminology and categorization context. It does not establish a prehospital “top 100” ranking.
- Major trauma: assessment and initial managementNational Institute for Health and Care Excellence
Evidence-based initial assessment, hemorrhage control, imaging, and trauma-system guidance.
- Traumatic hemorrhage and chain of survivalScandinavian Journal of Trauma, Resuscitation and Emergency Medicine · 2023
Early hemorrhage recognition, direct bleeding control, perfusion assessment, and trauma-system response.