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Войти в исследования Japanese journal of radiology · 2025
CT-based assessment of bear-inflicted maxillofacial injuries: evaluation using the facial injury severity scale and its association with hospitalization duration.
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Hatakeyama Kento, Otani Takahiro, Satoh Kasumi, Tsuchida Hideomi, Tozawa Tomoki, Konno Motoko, Suzuki Shinsuke, Tezuka Takafumi, Mugikura Shunji, Hayakawa Akira, Yamada Takechiyo, Nakae Hajime, Mori Naoko
Аннотация
PURPOSE: Bear-inflicted injuries are often associated with severe maxillofacial injury. This study aimed to evaluate CT findings of bear-inflicted injuries using the Facial Injury Severity Scale (FISS) and other trauma grading systems, with a particular focus on the relationship between FISS scores and hospitalization duration as well as the characteristics of maxillofacial injuries.
MATERIALS AND METHODS: This retrospective study included 31 patients with bear-inflicted injuries who underwent whole-body CT. Maxillofacial injury severity was assessed using FISS, while head and thoracic injuries were evaluated using the Marshall Head-CT Classification and the AAST Chest Wall Injury Scale, respectively. Patients were categorized into short (≤ 18 days) and long (> 18 days) hospitalization groups based on the median hospitalization duration. Univariate and multivariate analyses were performed to identify factors associated with hospitalization duration.
RESULTS: Patients in the long hospitalization group had higher FISS scores (p = 0.01) and AAST chest wall injury grades (p = 0.03), with no significant differences in Marshall Head-CT Classification. Multivariate analysis confirmed that both FISS scores and AAST chest wall injury grade were independently associated with hospitalization duration. A detailed analysis of FISS scores revealed significant bilateral correlations between right and left midface scores (p < 0.01) and right and left upper face scores (p < 0.01). Additionally, significant correlations were observed between midface and upper face scores.
CONCLUSION: FISS scores and AAST chest wall injury grades were significantly associated with hospitalization duration in bear-inflicted injuries. The midface and upper face injuries often occur simultaneously and bilaterally, possibly due to bears targeting the upper face to weaken their opponent.
MATERIALS AND METHODS: This retrospective study included 31 patients with bear-inflicted injuries who underwent whole-body CT. Maxillofacial injury severity was assessed using FISS, while head and thoracic injuries were evaluated using the Marshall Head-CT Classification and the AAST Chest Wall Injury Scale, respectively. Patients were categorized into short (≤ 18 days) and long (> 18 days) hospitalization groups based on the median hospitalization duration. Univariate and multivariate analyses were performed to identify factors associated with hospitalization duration.
RESULTS: Patients in the long hospitalization group had higher FISS scores (p = 0.01) and AAST chest wall injury grades (p = 0.03), with no significant differences in Marshall Head-CT Classification. Multivariate analysis confirmed that both FISS scores and AAST chest wall injury grade were independently associated with hospitalization duration. A detailed analysis of FISS scores revealed significant bilateral correlations between right and left midface scores (p < 0.01) and right and left upper face scores (p < 0.01). Additionally, significant correlations were observed between midface and upper face scores.
CONCLUSION: FISS scores and AAST chest wall injury grades were significantly associated with hospitalization duration in bear-inflicted injuries. The midface and upper face injuries often occur simultaneously and bilaterally, possibly due to bears targeting the upper face to weaken their opponent.