THE AETIOLOGY OF ACCIDENTAL LONG-BONE FRACTURES IN CHILDREN LESS THAN 18 MONTHS OLD: A RETROSPECTIVE MULTICENTRE STUDY

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Aim Paediatric fractures are common but those occurring in non-ambulant children are associated with higher rates of Non Accidental Injury (NAI). There is little published on the mechanisms of injury associated with accidental fracture in young children. This study explores the aetiology of long bone fractures in non-ambulant children. Methods This retrospective multicentre study looked at children aged ≤18 months presenting to three hospitals over 3 years (2009 to 2011). Information was gathered on age, gender, fracture type, injury mechanism, final diagnosis, treatment and details of screening for NAI. Results 147 children were identified who were ≤18 months old (mean 12 months). There were 32 femoral, 37 tibial, 43 forearm, 17 humeral, 16 clavicular and 3 fibular fractures. We identified 6 confirmed cases of NAI and 7 pathological fractures (osteopenia of prematurity or osteogenesis imperfecta). 5/64 children aged ≤12 months old had NAI compared with 1/83 in those aged >12 months. All 7 pathological fractures occurred in the ≤12 months group. NAI or pathological fracture was more likely in ≤12 months group compared to those >12 months (p=0.0002) Of the 12 children with no clear mechanism of injury, 5 had NAI and 3 had pathological fractures. In 39/147 children NAI was considered in the documentation and 29 had a paediatric review. Falls from beds and change mats were more common in ≤12 months group, as well as transverse femoral fractures; caused when those carrying the child slipped downstairs and applied a sudden bending force to the held leg. In those >12 months falls from chairs, down steps, in playgrounds or on trampolines were more common. 12/147 fractures were caused directly by other children (6 in each group). Conclusion Our study identified causes of accidental long-bone fracture in non-ambulant children. In cases where there is no clear mechanism of injury, NAI must be carefully excluded.

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