Diferencia entre revisiones de «Blunt cerebrovascular injury»
(Created page with "Blunt cerebrovascular injury (BCVI) is a non-penetrating injury to the '''carotid and/or vertebral arteries''' that may be '''clinically silent initially''' but can cause '''devastating stroke''' if not identified and treated.<ref name="EAST">Blunt Cerebrovascular Injury Practice Management Guideline. ''EAST''. 2020.</ref> Incidence is 1-2% of blunt trauma admissions but up to '''9% in severe head injury'''. Screening with the '''Modified Denver Criteria''' and '''CTA'''...") |
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==Background== | ==Background== | ||
*BCVI includes: intimal flap/dissection, intramural hematoma, pseudoaneurysm, occlusion, and transection of the carotid or vertebral arteries | *BCVI includes: intimal flap/dissection, intramural hematoma, pseudoaneurysm, occlusion, and transection of the carotid or vertebral arteries | ||
* | *~50% of BCVI-related strokes occur before hospital arrival; the other half are preventable with screening and early treatment<ref name="PMC"/> | ||
*Carotid and vertebral arteries are | *Carotid and vertebral arteries are equally affected; carotid injuries carry higher mortality | ||
*Even with screening criteria, | *Even with screening criteria, ~20% of BCVI may be missed — some institutions now advocate universal CTA of the neck in all significant blunt trauma<ref name="REBEL">Blunt Cerebrovascular Injury: Universal Imaging for All? ''REBEL EM''. 2020.</ref> | ||
*Blunt cerebrovascular injury (BCVI) is a non-penetrating injury to the '''carotid and/or vertebral arteries''' that may be '''clinically silent initially''' but can cause '''devastating stroke''' if not identified and treated.<ref name="EAST">Blunt Cerebrovascular Injury Practice Management Guideline. ''EAST''. 2020.</ref> | |||
*Incidence is 1-2% of blunt trauma admissions but up to 9% in severe head injury. | |||
*Screening with the [[Denver Screening Criteria]] and CTA has reduced the stroke rate from ~15% to <1% in asymptomatic patients.<ref name="PMC">Blunt Cerebrovascular Injuries: Advances in Screening, Imaging, and Management Trends. ''AJNR''. 2021. PMC7655313.</ref> | |||
==Clinical Features== | ==Clinical Features== | ||
* | * Most patients are asymptomatic at initial presentation — this is why screening is critical | ||
*Symptomatic patients may present with: | *Symptomatic patients may present with: | ||
** | ** Acute stroke symptoms (hemiparesis, aphasia, facial droop) — may be delayed hours to days after injury | ||
** | ** Expanding cervical hematoma | ||
** | ** Arterial hemorrhage from neck, nose, or mouth | ||
** | ** Cervical bruit in a young patient (uncommon but specific) | ||
** | ** Horner syndrome (ptosis, miosis, anhidrosis) — from carotid dissection disrupting sympathetic fibers | ||
** | ** Neurologic deficit inconsistent with CT head findings — think BCVI if stroke territory doesn't match the head injury pattern | ||
==Differential Diagnosis== | ==Differential Diagnosis== | ||
{{Blunt neck trauma DDX}} | |||
==Evaluation== | ==Evaluation== | ||
===Workup=== | ===Workup=== | ||
* | * Apply Modified Denver Screening Criteria — obtain CTA if ANY ONE is present:<ref name="BPG">Best practice guidelines for BCVI. ''Scand J Trauma Resusc Emerg Med''. 2018. PMC6206718.</ref> | ||
Signs/symptoms: | |||
*Arterial hemorrhage from neck/nose/mouth | *Arterial hemorrhage from neck/nose/mouth | ||
*Cervical bruit in patient <50 years | *Cervical bruit in patient <50 years | ||
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*Stroke on CT or MRI | *Stroke on CT or MRI | ||
Risk factors (injury pattern): | |||
* | * Cervical spine fracture (any level, excluding isolated spinous/transverse process fractures) | ||
*C1-C3 fracture, subluxation, or ligamentous injury | *C1-C3 fracture, subluxation, or ligamentous injury | ||
*Fracture through the | *Fracture through the transverse foramen | ||
* | * Le Fort II or III facial fractures | ||
* | * Basilar skull fracture involving the carotid canal | ||
* | * Diffuse axonal injury with GCS <6 | ||
* | * Near-hanging or [[Strangulation|strangulation]] with anoxic brain injury | ||
*Mandible fractures | *Mandible fractures | ||
*Complex skull fractures | *Complex skull fractures | ||
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*Blunt cardiac rupture | *Blunt cardiac rupture | ||
* | * CTA of the neck (from aortic arch through circle of Willis): imaging modality of choice; sensitivity/specificity ~98%/100% with modern ≥16-slice CT<ref name="PMC"/> | ||
*'''Do NOT wait for symptoms''' to image — the whole point is to screen '''asymptomatic''' patients before they stroke | *'''Do NOT wait for symptoms''' to image — the whole point is to screen '''asymptomatic''' patients before they stroke | ||
===Diagnosis=== | ===Diagnosis=== | ||
* | * Biffl Grading Scale (determines management): | ||
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*Many | *Many grade I-II injuries heal spontaneously within 7-10 days with antithrombotic therapy | ||
* | * Follow-up CTA at 7-10 days is standard to reassess injury progression or healing | ||
==Management== | ==Management== | ||
* | *Start antithrombotic therapy (ATT) as soon as safely possible — this is the single most important intervention to prevent stroke<ref name="EAST"/> | ||
**ATT reduces stroke risk: OR 0.20 (80% reduction) and mortality: OR 0.17<ref name="EAST"/> | **ATT reduces stroke risk: OR 0.20 (80% reduction) and mortality: OR 0.17<ref name="EAST"/> | ||
* | * Preferred antithrombotic regimens: | ||
** | ** Aspirin 325 mg daily — most commonly used; simplest; adequate for most grade I-II injuries | ||
** | ** Aspirin + clopidogrel — used at some centers for higher-grade injuries | ||
** | ** Heparin infusion (target PTT 40-50) — alternative, especially if higher-grade injury or concern for thrombus progression | ||
* | * When ATT is contraindicated (intracranial hemorrhage, solid organ injury, other active bleeding): | ||
** | ** Discuss with trauma surgery/neurosurgery — risk-benefit must be weighed case by case | ||
**Some centers delay ATT 24-72 hours until bleeding risk stabilizes; others accept the stroke risk temporarily | **Some centers delay ATT 24-72 hours until bleeding risk stabilizes; others accept the stroke risk temporarily | ||
**'''Do not simply omit ATT''' without a documented plan — untreated BCVI has a '''21% stroke rate'''<ref name="EAST"/> | **'''Do not simply omit ATT''' without a documented plan — untreated BCVI has a '''21% stroke rate'''<ref name="EAST"/> | ||
* | * Grade V (transection with active hemorrhage): emergent hemorrhage control — direct pressure, emergent endovascular intervention, or operative repair | ||
* | * Grade III-IV: ATT ± endovascular stenting (decision made by vascular surgery/interventional radiology at follow-up; not an ED decision) | ||
* | * Consult: trauma surgery, and as needed neurosurgery and/or vascular surgery/interventional radiology | ||
==Disposition== | ==Disposition== | ||
* | * All patients with confirmed BCVI: admit to trauma service with serial neurologic examinations | ||
* | * Start ATT in the ED if no contraindication — do not defer to the floor | ||
* | * Follow-up CTA at 7-10 days — document this plan; many grade I-II injuries resolve; grade III+ may progress and require intervention | ||
* | * If screening criteria are met but CTA is negative: admit the trauma patient per standard protocols; a negative CTA has very high NPV — no further BCVI-specific follow-up needed unless new neurologic symptoms develop | ||
* | * Document clearly: Denver screening criteria met, CTA result, Biffl grade if positive, ATT initiated (and agent/dose), and follow-up imaging plan | ||
==See Also== | ==See Also== | ||
Revisión actual - 09:26 22 mar 2026
Background
- BCVI includes: intimal flap/dissection, intramural hematoma, pseudoaneurysm, occlusion, and transection of the carotid or vertebral arteries
- ~50% of BCVI-related strokes occur before hospital arrival; the other half are preventable with screening and early treatment[1]
- Carotid and vertebral arteries are equally affected; carotid injuries carry higher mortality
- Even with screening criteria, ~20% of BCVI may be missed — some institutions now advocate universal CTA of the neck in all significant blunt trauma[2]
- Blunt cerebrovascular injury (BCVI) is a non-penetrating injury to the carotid and/or vertebral arteries that may be clinically silent initially but can cause devastating stroke if not identified and treated.[3]
- Incidence is 1-2% of blunt trauma admissions but up to 9% in severe head injury.
- Screening with the Denver Screening Criteria and CTA has reduced the stroke rate from ~15% to <1% in asymptomatic patients.[1]
Clinical Features
- Most patients are asymptomatic at initial presentation — this is why screening is critical
- Symptomatic patients may present with:
- Acute stroke symptoms (hemiparesis, aphasia, facial droop) — may be delayed hours to days after injury
- Expanding cervical hematoma
- Arterial hemorrhage from neck, nose, or mouth
- Cervical bruit in a young patient (uncommon but specific)
- Horner syndrome (ptosis, miosis, anhidrosis) — from carotid dissection disrupting sympathetic fibers
- Neurologic deficit inconsistent with CT head findings — think BCVI if stroke territory doesn't match the head injury pattern
Differential Diagnosis
Neck Trauma
- Penetrating neck trauma
- Blunt neck trauma
- Cervical injury
- Neurogenic shock
- Spinal cord injury
Evaluation
Workup
- Apply Modified Denver Screening Criteria — obtain CTA if ANY ONE is present:[4]
Signs/symptoms:
- Arterial hemorrhage from neck/nose/mouth
- Cervical bruit in patient <50 years
- Expanding cervical hematoma
- Focal neurologic deficit (TIA, hemiparesis, Horner syndrome)
- Neurologic deficit inconsistent with head CT findings
- Stroke on CT or MRI
Risk factors (injury pattern):
- Cervical spine fracture (any level, excluding isolated spinous/transverse process fractures)
- C1-C3 fracture, subluxation, or ligamentous injury
- Fracture through the transverse foramen
- Le Fort II or III facial fractures
- Basilar skull fracture involving the carotid canal
- Diffuse axonal injury with GCS <6
- Near-hanging or strangulation with anoxic brain injury
- Mandible fractures
- Complex skull fractures
- Scalp degloving
- Thoracic vascular injury
- Blunt cardiac rupture
- CTA of the neck (from aortic arch through circle of Willis): imaging modality of choice; sensitivity/specificity ~98%/100% with modern ≥16-slice CT[1]
- Do NOT wait for symptoms to image — the whole point is to screen asymptomatic patients before they stroke
Diagnosis
- Biffl Grading Scale (determines management):
| Grade | Injury | Stroke risk |
|---|---|---|
| I | Intimal irregularity or dissection with <25% luminal narrowing | Low |
| II | Dissection/intramural hematoma with ≥25% luminal narrowing, intraluminal thrombus, or raised intimal flap | Moderate |
| III | Pseudoaneurysm | Moderate-high |
| IV | Complete occlusion | High |
| V | Transection with active extravasation | Highest; hemorrhagic emergency |
- Many grade I-II injuries heal spontaneously within 7-10 days with antithrombotic therapy
- Follow-up CTA at 7-10 days is standard to reassess injury progression or healing
Management
- Start antithrombotic therapy (ATT) as soon as safely possible — this is the single most important intervention to prevent stroke[3]
- ATT reduces stroke risk: OR 0.20 (80% reduction) and mortality: OR 0.17[3]
- Preferred antithrombotic regimens:
- Aspirin 325 mg daily — most commonly used; simplest; adequate for most grade I-II injuries
- Aspirin + clopidogrel — used at some centers for higher-grade injuries
- Heparin infusion (target PTT 40-50) — alternative, especially if higher-grade injury or concern for thrombus progression
- When ATT is contraindicated (intracranial hemorrhage, solid organ injury, other active bleeding):
- Discuss with trauma surgery/neurosurgery — risk-benefit must be weighed case by case
- Some centers delay ATT 24-72 hours until bleeding risk stabilizes; others accept the stroke risk temporarily
- Do not simply omit ATT without a documented plan — untreated BCVI has a 21% stroke rate[3]
- Grade V (transection with active hemorrhage): emergent hemorrhage control — direct pressure, emergent endovascular intervention, or operative repair
- Grade III-IV: ATT ± endovascular stenting (decision made by vascular surgery/interventional radiology at follow-up; not an ED decision)
- Consult: trauma surgery, and as needed neurosurgery and/or vascular surgery/interventional radiology
Disposition
- All patients with confirmed BCVI: admit to trauma service with serial neurologic examinations
- Start ATT in the ED if no contraindication — do not defer to the floor
- Follow-up CTA at 7-10 days — document this plan; many grade I-II injuries resolve; grade III+ may progress and require intervention
- If screening criteria are met but CTA is negative: admit the trauma patient per standard protocols; a negative CTA has very high NPV — no further BCVI-specific follow-up needed unless new neurologic symptoms develop
- Document clearly: Denver screening criteria met, CTA result, Biffl grade if positive, ATT initiated (and agent/dose), and follow-up imaging plan
See Also
- Vertebral artery dissection
- Carotid artery dissection
- Penetrating neck trauma
- Cervical fractures and dislocations
- Strangulation
- Stroke
- Traumatic brain injury
External Links
- EAST — Blunt Cerebrovascular Injury Practice Management Guideline (2020)
- Scand J Trauma — Best practice guidelines for BCVI (2018)
- AJNR — Blunt Cerebrovascular Injuries: Advances in Screening, Imaging, and Management (2021)
- EMRA — A Review of Blunt Cerebrovascular Injuries
References
- ↑ 1.0 1.1 1.2 Blunt Cerebrovascular Injuries: Advances in Screening, Imaging, and Management Trends. AJNR. 2021. PMC7655313.
- ↑ Blunt Cerebrovascular Injury: Universal Imaging for All? REBEL EM. 2020.
- ↑ 3.0 3.1 3.2 3.3 Blunt Cerebrovascular Injury Practice Management Guideline. EAST. 2020.
- ↑ Best practice guidelines for BCVI. Scand J Trauma Resusc Emerg Med. 2018. PMC6206718.