Objectives: The primary objective of this study was to determine the epidemiological characteristics, treatment success and the functional outcome of supracondylar fractures. As the newly introduced BIS information system was used to collect data, our goal was to identify its advantages and disadvantages in data collection and processing. Patients and methods: The study was conducted using a retrospective analysis of the database of the Department of Pediatric Surgery, University Hospital of Split. Data on 66 patients aged 0-18 with radiologically confirmed supracondylar fractures in Splitsko-Dalmatinska county were collected from the beginning of February 2021. until the beginning of February 2022. During this time, data on the duration of treatment of supracondylar fractures, treatment outcomes and the number of complications caused by the crossed Kirschner wire ostesynthesis, were analysed. The data for this study was collected from the medical reports and radiological findings of University Hospital of Split listed in the BIS. Treatment outcome data was not available for 3 patients. Results: The majority of fractures were treated with immobilization by an upper arm splint, administered in 45 (68.2%) patients. Of the 20 surgically treated patients, a crossed wire method of osteosynthesis with Kirschner wires was used in all of them. Of the 63 patients, 55 (87.3%) had a satisfactory functional outcome. Preoperative neurological complications in this study caused by supracondylar fractures were present in 4 (6%) patients, while vascular and other complications were not reported. Of the 20 patients treated with the crossed method of osteosynthesis with Kirschner wires, no iatrogenic neurovascular complications were registered. Conclusion: Epidemiological characteristics, duration, functional outcome and the percentage of complications in the treatment of supracondylar fractures are consistent with data in other published studies. It was found that the most commonly used form of treatment for supracondylar fractures is immobilization with an upper arm splint, and the most commonly used operative method is the crossed wire method of osteosynthesis with Kirschner wires. The number of iatrogenic complications caused by the crossed method of ostesynthesis with Kirschner wires in our study is lower than the number of complications in other available studies. The Croatian hospital information system significantly facilitates the collection of patient data.