🧠 Blunt Cerebrovascular Injury Screening (Expanded Denver)
This tool applies the expanded Denver criteria to decide whether blunt trauma warrants neck CT angiography to screen for blunt cerebrovascular injury (BCVI).
Clinical takeaway
BCVI stroke risk is roughly 1–10% and highest within 72 h, so proactive screening of high-risk mechanisms matters even when the patient is asymptomatic. (original synthesis · not guideline verbatim)
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When to use
Use during trauma evaluation to identify patients who should undergo neck CTA based on BCVI signs/symptoms or high-risk injury mechanisms, since most BCVI is initially asymptomatic.
How it works
Screen positive if any BCVI sign/symptom OR any high-risk factor is present → neck CTA recommended. Signs/symptoms drive a high-priority (emergent imaging) pathway; risk factors alone drive a screening pathway.
Key points
- BCVI stroke risk is roughly 1–10% and highest within 72 h, so proactive screening of high-risk mechanisms matters even when the patient is asymptomatic. (original synthesis · not guideline verbatim)
- Confirmed BCVI is usually treated with antithrombotic therapy, balanced against bleeding risk from concomitant TBI, solid-organ, or pelvic injury.
- The expanded Denver criteria can still miss cases; some centers screen more liberally.
References
- Biffl WL, et al. Blunt carotid arterial injuries: implications of a new grading scale. J Trauma 1999.
- Burlew CC, et al. Blunt cerebrovascular injuries: redefining screening criteria. J Trauma Acute Care Surg 2012.
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| BCVI signs/symptoms (any): arterial bleeding from neck/nose/mouth, cervical bruit (<50 yr), expanding cervical hematoma, focal neurologic deficit (TIA/hemiparesis/Horner/vertebrobasilar), deficit incongruent with head CT, ischemic stroke on CT/MRI | None |
|---|---|
| Risk factors (high-energy mechanism + any): Le Fort II/III, mandible fracture, skull-base/complex skull fracture, cervical spine fracture (esp. C1–3/transverse-foramen/subluxation), DAI or GCS <6, near-hanging with hypoxia, seatbelt/clothesline-type neck injury, scalp degloving, great-vessel chest injury | None |
→Screening recommendationScreening not currently needed
- Decision：No corresponding signs/symptoms or risk factors; proceed with standard trauma evaluation and re-assess dynamically if needed
- Significance：BCVI (blunt carotid/vertebral injury) carries a ~1–10% stroke risk, highest within 72 h of injury; most are initially asymptomatic, so high-risk mechanisms are screened proactively
- Management：Once confirmed, antithrombotic therapy (antiplatelet or anticoagulation) is usually given, weighing bleeding risk with trauma surgery (concomitant TBI/solid-organ/pelvic bleeding); follow by Biffl/Denver grade
| BCVI signs/symptoms (any): arterial bleeding from neck/nose/mouth, cervical bruit (<50 yr), expanding cervical hematoma, focal neurologic deficit (TIA/hemiparesis/Horner/vertebrobasilar), deficit incongruent with head CT, ischemic stroke on CT/MRI | ≥1 present |
|---|---|
| Risk factors (high-energy mechanism + any): Le Fort II/III, mandible fracture, skull-base/complex skull fracture, cervical spine fracture (esp. C1–3/transverse-foramen/subluxation), DAI or GCS <6, near-hanging with hypoxia, seatbelt/clothesline-type neck injury, scalp degloving, great-vessel chest injury | ≥1 present |
→Screening recommendationNeck CTA recommended
- Decision：Signs/symptoms or risk factors present → neck CT angiography (CTA) recommended to screen for BCVI; with signs/symptoms, obtain emergent imaging and treat bleeding/stroke early
- Significance：BCVI (blunt carotid/vertebral injury) carries a ~1–10% stroke risk, highest within 72 h of injury; most are initially asymptomatic, so high-risk mechanisms are screened proactively
- Management：Once confirmed, antithrombotic therapy (antiplatelet or anticoagulation) is usually given, weighing bleeding risk with trauma surgery (concomitant TBI/solid-organ/pelvic bleeding); follow by Biffl/Denver grade
Frequently asked questions
- What is Blunt Cerebrovascular Injury Screening (Expanded Denver)?
- This tool applies the expanded Denver criteria to decide whether blunt trauma warrants neck CT angiography to screen for blunt cerebrovascular injury (BCVI).
- How is Blunt Cerebrovascular Injury Screening (Expanded Denver) calculated? What is the core formula?
- Screen positive if any BCVI sign/symptom OR any high-risk factor is present → neck CTA recommended. Signs/symptoms drive a high-priority (emergent imaging) pathway; risk factors alone drive a screening pathway.
- When is Blunt Cerebrovascular Injury Screening (Expanded Denver) used?
- Use during trauma evaluation to identify patients who should undergo neck CTA based on BCVI signs/symptoms or high-risk injury mechanisms, since most BCVI is initially asymptomatic.
- What are the key clinical points for Blunt Cerebrovascular Injury Screening (Expanded Denver)?
- BCVI stroke risk is roughly 1–10% and highest within 72 h, so proactive screening of high-risk mechanisms matters even when the patient is asymptomatic. (original synthesis · not guideline verbatim) Confirmed BCVI is usually treated with antithrombotic therapy, balanced against bleeding risk from concomitant TBI, solid-organ, or pelvic injury. The expanded Denver criteria can still miss cases; some centers screen more liberally.
- What are the limits and cautions when using Blunt Cerebrovascular Injury Screening (Expanded Denver)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is Blunt Cerebrovascular Injury Screening (Expanded Denver) calculated in practice? Can you show a worked example?
- Inputs: BCVI signs/symptoms (any): arterial bleeding from neck/nose/mouth, cervical bruit (<50 yr), expanding cervical hematoma, focal neurologic deficit (TIA/hemiparesis/Horner/vertebrobasilar), deficit incongruent with head CT, ischemic stroke on CT/MRI None, Risk factors (high-energy mechanism + any): Le Fort II/III, mandible fracture, skull-base/complex skull fracture, cervical spine fracture (esp. C1–3/transverse-foramen/subluxation), DAI or GCS <6, near-hanging with hypoxia, seatbelt/clothesline-type neck injury, scalp degloving, great-vessel chest injury None → Result: Screening recommendation Screening not currently needed（Decision: No corresponding signs/symptoms or risk factors; proceed with standard trauma evaluation and re-assess dynamically if needed, Significance: BCVI (blunt carotid/vertebral injury) carries a ~1–10% stroke risk, highest within 72 h of injury; most are initially asymptomatic, so high-risk mechanisms are screened proactively, Management: Once confirmed, antithrombotic therapy (antiplatelet or anticoagulation) is usually given, weighing bleeding risk with trauma surgery (concomitant TBI/solid-organ/pelvic bleeding); follow by Biffl/Denver grade） Inputs: BCVI signs/symptoms (any): arterial bleeding from neck/nose/mouth, cervical bruit (<50 yr), expanding cervical hematoma, focal neurologic deficit (TIA/hemiparesis/Horner/vertebrobasilar), deficit incongruent with head CT, ischemic stroke on CT/MRI ≥1 present, Risk factors (high-energy mechanism + any): Le Fort II/III, mandible fracture, skull-base/complex skull fracture, cervical spine fracture (esp. C1–3/transverse-foramen/subluxation), DAI or GCS <6, near-hanging with hypoxia, seatbelt/clothesline-type neck injury, scalp degloving, great-vessel chest injury ≥1 present → Result: Screening recommendation Neck CTA recommended（Decision: Signs/symptoms or risk factors present → neck CT angiography (CTA) recommended to screen for BCVI; with signs/symptoms, obtain emergent imaging and treat bleeding/stroke early, Significance: BCVI (blunt carotid/vertebral injury) carries a ~1–10% stroke risk, highest within 72 h of injury; most are initially asymptomatic, so high-risk mechanisms are screened proactively, Management: Once confirmed, antithrombotic therapy (antiplatelet or anticoagulation) is usually given, weighing bleeding risk with trauma surgery (concomitant TBI/solid-organ/pelvic bleeding); follow by Biffl/Denver grade）