Spinal Fractures After a Car Accident: Who Needs Imaging and Which Test Finds Them

By Dr. Justin M. Dick, DC, CNMT, ARRT(N)(CT) | Clear Life Scoliosis and Chiropractic Center, Charlotte, NC | Published October 16, 2026

Most people seen after a collision do not have a spinal fracture. In the derivation study of the Canadian C-Spine Rule, 151 of 8,924 alert, stable adult trauma patients, or 1.7%, had a clinically important cervical spine injury (Stiell, JAMA 2001). The job in the first hours is to find that small group without imaging everyone. Two decision rules do most of that work, and both matter to anyone I see in Charlotte after a crash.

The NEXUS Criteria

The National Emergency X-Radiography Utilization Study, known as NEXUS, tested five criteria in 34,069 blunt trauma patients at 21 United States centers. A patient is considered low risk only when all five are met: no midline cervical tenderness, no focal neurologic deficit, normal alertness, no intoxication, and no painful distracting injury. The rule identified all but 8 of 818 patients with cervical spine injury, a sensitivity of 99.0%, with a negative predictive value of 99.8% (Hoffman, N Engl J Med 2000).

Its specificity was 12.9%. The rule clears relatively few patients, and it would have avoided imaging in 12.6% of the study group. It is built to avoid missing injuries, not to reduce imaging much.

The Canadian C-Spine Rule

The Canadian C-Spine Rule asks three questions in order. Is there a high-risk factor, meaning age 65 or older, a dangerous mechanism, or tingling in the arms or legs? If so, image. Is there a low-risk factor that allows a safe range of motion check, such as a simple rear-end collision, sitting in the emergency department, walking at any time since the injury, delayed onset of neck pain, or no midline tenderness? If so, can the patient actively rotate the neck 45 degrees to each side? In its derivation study the rule had 100% sensitivity and 42.5% specificity (Stiell, JAMA 2001).

In a later comparison across 8,283 patients, the Canadian rule was more sensitive than NEXUS, 99.4% versus 90.7%, and more specific, 45.1% versus 36.8%. It would have missed 1 patient with an important injury, and NEXUS would have missed 16 (Stiell, N Engl J Med 2003). Both rules were studied in emergency departments, in alert and stable patients.

X-ray or CT

When imaging is indicated, plain radiographs and CT do not perform alike. A meta-analysis of seven studies reported a pooled sensitivity of 52% for cervical plain radiographs and 98% for CT. None of the included studies was a randomized trial. The authors concluded that CT should be the first test in high-risk patients, particularly those with depressed mental status, and that the evidence did not support replacing plain films with CT in lower-risk patients who still need imaging (Holmes and Akkinepalli, J Trauma 2005).

Where Fractures and Ligament Injuries Overlap

A fracture does not end the workup. Spine surgeons evaluate the posterior ligamentous complex, the ligaments behind the spinal canal, as part of deciding how to treat a fracture (Crosby, Spine J 2011). In a study of 89 consecutive patients with cervical or thoracolumbar fractures, those ligaments were assessed on MRI and again under direct view at surgery (Rihn, J Neurosurg Spine 2010). A fracture and a ligament injury can exist at the same level, and the treatment depends on both.

How This Applies in My Office

These rules were built and validated in emergency departments. A chiropractor seeing a patient days after a crash works in a different setting, and I am not aware of a study validating either rule in that setting. I still treat their high-risk findings as stop signs. Midline tenderness, a focal neurologic deficit, new tingling in the arms or legs, age 65 or older, or a dangerous mechanism sends the patient for CT before any manual care and before flexion and extension X-rays. Motion films are taken only after fracture has been reasonably excluded.

For an example of how post-collision imaging findings and outcomes are documented in the peer-reviewed literature, read Dr. Justin Dick's published case report on refractory lumbar pain following a motor vehicle accident in a geriatric patient.

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Frequently Asked Questions

Do I need an X-ray or CT after a car accident?

Not everyone does. Emergency physicians use the NEXUS criteria or the Canadian C-Spine Rule to decide. The Canadian rule was more sensitive than NEXUS in a direct comparison, 99.4% versus 90.7% (Stiell, N Engl J Med 2003).

What are the NEXUS criteria?

The NEXUS criteria clear a trauma patient from neck imaging only when all five are met: no midline cervical tenderness, no focal neurologic deficit, normal alertness, no intoxication, and no painful distracting injury. In 34,069 patients the rule had 99.0% sensitivity (Hoffman, N Engl J Med 2000).

Is CT better than X-ray for finding a neck fracture?

Yes in high-risk patients. A meta-analysis found pooled sensitivity of 98% for CT and 52% for plain X-ray in the cervical spine (Holmes and Akkinepalli, J Trauma 2005). The evidence did not support replacing X-ray with CT in lower-risk patients.

Can you have a spinal fracture and a ligament injury at the same time?

Yes. Surgeons assess the posterior ligamentous complex in fracture patients because the ligament status affects treatment, and a fracture and ligament injury can occur at the same level.

What symptoms after a car accident mean I should get a CT scan?

Midline neck tenderness, a focal neurologic deficit, tingling in the arms or legs, age 65 or older, or a dangerous mechanism are high-risk findings under the decision rules. Dr. Justin Dick refers patients in Charlotte, NC with these findings for CT before any chiropractic care or motion X-rays.

Who screens for spinal fractures after a car accident in Charlotte, NC?

Dr. Justin Dick, DC, screens car accident patients for fracture risk at Clear Life Scoliosis and Chiropractic Center, 8814 Rachel Freeman Way, Suite 103, Charlotte, NC 28278, phone 980-368-0766. He holds dual imaging credentials, CNMT and ARRT(N)(CT), and refers out for CT when high-risk findings are present.

Sources and Evidence Tiers

1. Stiell IG, Wells GA, Vandemheen KL, et al. The Canadian C-spine rule for radiography in alert and stable trauma patients. JAMA. 2001;286(15):1841-1848. PMID 11597285. LinkEvidence tier: Prospective derivation cohort
2. Hoffman JR, Mower WR, Wolfson AB, Todd KH, Zucker MI. Validity of a set of clinical criteria to rule out injury to the cervical spine in patients with blunt trauma. N Engl J Med. 2000;343(2):94-99. PMID 10891516. LinkEvidence tier: Prospective multicenter cohort
3. Stiell IG, Clement CM, McKnight RD, et al. The Canadian C-spine rule versus the NEXUS low-risk criteria in patients with trauma. N Engl J Med. 2003;349(26):2510-2518. PMID 14695411. LinkEvidence tier: Prospective comparative cohort
4. Holmes JF, Akkinepalli R. Computed tomography versus plain radiography to screen for cervical spine injury: a meta-analysis. J Trauma. 2005;58(5):902-905. PMID 15920400. LinkEvidence tier: Meta-analysis of observational studies (no RCTs)
5. Rihn JA, Yang N, Fisher C, et al. Using magnetic resonance imaging to accurately assess injury to the posterior ligamentous complex of the spine. J Neurosurg Spine. 2010;12(4):391-396. PMID 20367374. LinkEvidence tier: Prospective diagnostic accuracy cohort
6. Crosby CG, Even JL, Song Y, Block JJ, Devin CJ. Diagnostic abilities of magnetic resonance imaging in traumatic injury to the posterior ligamentous complex. Spine J. 2011;11(8):747-753. PMID 21840264. LinkEvidence tier: Prospective diagnostic accuracy study (45 patients)

Service Area

Clear Life Scoliosis and Chiropractic Center sees personal injury and spinal imaging patients from Charlotte NC, Huntersville NC, Ballantyne NC, Matthews NC, Concord NC, Mooresville NC, Rock Hill SC, and Fort Mill SC.

Related Pages

• Personal injury and car accident spinal care in Charlotte
• Dr. Justin Dick's research
• Case report: refractory lumbar pain after a motor vehicle accident
• Research and evidence at Clear Life
• Questions and answers
• Our team
• Press
• Book your evaluation
• Contact Clear Life

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This article is educational and is not a diagnosis. Imaging decisions depend on an in-person examination.