EBQ:Canadian C-spine Rule Study: Difference between revisions

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Complete Journal Club Article
Stiell, Ian et al. "The Canadian C-spine Rule for Radiography in Alert and Stable Trauma Patients". JAMA. 2001. 286(15):1841-1848.
PubMed Full text PDF

Clinical Question

Can a clinical decision rule be used to evaluate the cervical spine in alert and stable trauma patients?

Conclusion

The Canadian C-spine rule is a highly sensitive decision rule for evaluate of clinically significant cervical spine injuries in trauma patients.

Major Points

CCspine.png

Three Main Questions:

  1. Is there any high-risk factor that mandates radiography?
  2. Is there any low-risk factor that allows safe assessment of ROM?
  3. Is pt able to actively rotate neck 45° to the left and right?

Rule had 100% sensitivity and 42.5% specificity for identifying 151 clinically important C-spine injuries.

Study Design

Prospective cohort study of blunt trauma patients from 10 Canadian EDs (community and university hospitals), where each pt was evaluated for 20 standardized clinical findings before radiographs (3 views). Flex/Ex views and CT C-spine underwent at discretion of treating physician. Subset of patients were also assessed by second EM physician independently. Additional 5 demographic variables obtained by study RNs from hospital records. Clinical decision rule derived using statistical means (see article for more detail)

Clinically important C-spine injury (fx, dislocation or ligamentous instability on imaging) was the primary outcome measure, which requires stabilization or specialized follow-up. The following injuries were not considered clinically important:

  • Isolated avulsion fx of osteophyte
  • Isolated transverse process fx involving facet joint
  • Isolated spinous process fx not involving lamina
  • Simple compression fx (<25% vertebral body height)

Inclusion Criteria

  • Patients sustaining acute blunt trauma to head/neck, who were at risk for C-spine injury, which is defined as the following:
    • Neck pain based on mechanism of injury
    • No neck pain w/ some visible injury above clavicles, non-ambulatory before, and sustained dangerous mechanism
  • Patient had to be alert (GCS 15) and stable (nl VS = SBP>90 and RR 10-24/min)

Exclusion Criteria

  • Age <16 years old
  • Minor injuries (ie simple laceration) and did not meet inclusion criteria
  • GCS<15
  • Grossly abnl VS
  • Injured >48hrs previously
  • Penetrating trauma
  • Acute paralysis
  • Known vertebral disease (ie RA, spine stenosis, previous C-spine injury, anklyosing spondylitis)
  • Returned for reassessment of same injury
  • Pregnant

Baseline Characteristics

  • Mean age: 37 years old
  • Gender: 51.5% male
  • Neck pain: 91.5%
  • Mechanism of Injury: MVA (67%) and Fall (14.3%)
  • Imaging performed: Radiographs (68.9%) and CT (4.9%)
  • Clinically important C-spine injury: Fx (1.6%) > Dislocation (0.3%) > Ligamentous instability (0.1%)
  • Stabilizing Tx: Rigid collar (0.7%) > Halo (0.6%) > Internal fixation (0.3%) > Brace (0.2%)
  • Admission: 8.1%

Outcome

n=8924 adults enrolled and assessed

Primary Outcomes

151 (1.7%) had clinically important C-spine injury

Criticisms & Further Discussion

  • Complicated algorithm
  • Low rate of x-rays performed
  • How does it compare to the NEXUS criteria?

Funding

Peer-reviewed grants from the Medical Research Council of Canada and the Ontario Ministry of Health Emergency Health Services Committee

CME

Neuro/trauma question: The following patients are brought in to the ED with C-Collars in place. Which patient/patients, if any, could have their cervical spines cleared clinically and removed from immobilization? (more than one answer possible)

9 year old female with unwitnessed fall from bed on to carpeted floor with no loss of consciousness or neck pain, ambulating on scene upon paramedic arrival and only complains of an abrasion to his elbow and tingling/pins and needles sensation in her hand
47 year old male who was assaulted with loss of consciousness, now 4-6-5, with no other injury/deficits.
18 year old male who is A+O x3 with facial abrasions but with no neurological deficits, loss of consciousness or neck pain brought in after an MVA in which his main injury is an open femur fracture
27 your old female found down outside of a bar GCS 4-6-4 initially upon paramedic arrival now 4-6-5 with positive ETOH on breath, who admits to having just a couple of beers earlier in the evening
95 year old woman who sustained a mechanical fall in bathtub. No midline neck pain, denies A+O x3, no other complaints/injuries, normal neuro exam. Only complaint is a 2cm laceration to her eyebrow.


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