Canadian CT head rule and New Orleans Criteria in mild traumatic brain injury: comparison at a tertiary referral hospital in Japan

Daddy Mata-Mbemba, Shunji Mugikura, Atsuhiro Nakagawa, Takaki Murata, Yumiko Kato, Yasuko Tatewaki, Kei Takase, Shigeki Kushimoto, Teiji Tominaga, Shoki Takahashi, Daddy Mata-Mbemba, Shunji Mugikura, Atsuhiro Nakagawa, Takaki Murata, Yumiko Kato, Yasuko Tatewaki, Kei Takase, Shigeki Kushimoto, Teiji Tominaga, Shoki Takahashi

Abstract

We compared Canadian computed tomography (CT) head rule (CCHR) and New Orleans Criteria (NOC) in predicting important CT findings in patients with mild traumatic brain injury (TBI). We included 142 consecutive patients with mild TBI [Glasgow coma scale (GCS) 13-15] who showed at least one of the risk factors stated in the CCHR or the NOC. We introduced two scores: a Canadian from the CCHR and a New Orleans from the NOC. A patient's score represented a sum of the number of positive items. We examined the relationship between scores or items and the presence of important CT findings. Only the Canadian was significantly associated with important CT findings in multivariate analyses and showed higher area under the receiver operating characteristic curve (AUC) either in all 142 patients (GCS 13-15: P = 0.0130; AUC = 0.69) or in the 67 with a GCS = 15 (P = 0.0128, AUC = 0.73). Of items, ">60 years" or "≥65 years" included in either guideline was the strongest predictor of important CT finding, followed by "GCS < 15 after 2 h" included only in the CCHR. In a tertiary referral hospital in Japan, CCHR had higher performance than the NOC in predicting important CT findings.

Keywords: Canadian computed tomography (CT) head rule; Computed tomography (CT); Mild traumatic brain injury; New Orleans Criteria; Traumatic brain injury.

Figures

Fig. 1
Fig. 1
A 42-year-old man who was hit by a car while riding a bicycle. His GCS on admission to the emergency room was 14 out of 15. Two hours after admission, the patient’s GCS remained the same. The patient showed any of the New Orleans guideline’s items, therefore, his New Orleans score was 0. This is in contrast to the Canadian guideline, in which the patient had a GCS score of less than 15 at 2 h after admission (scored +1) and his mechanism of accident (car versus bicycle) fits the dangerous mechanism item (scored +1), leading to a Canadian Score of 2. On CT, the patients shows acute subarachnoid hemorrhages in the left Sylvian fissure (left panel, arrow) and on the surface of the left frontal lobe (middle, arrow). More importantly, some hyperdense foci that are suspected to represent a diffuse axonal injury are seen in the corpus callosum (middle panel, dashed arrow). The follow-up MRI study performed later, confirms the presence of DAI lesions on T2*WI (right panel, dashed arrow)

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Source: PubMed

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