Incidence of Traumatic Diaphragmatic Injury: Results From a Retrospective Cohort Study in a Level I Trauma Center in Riyadh.

Introduction Traumatic diaphragmatic injuries (TDIs) are uncommon and the incidence of TDI is difficult to estimate because of the variation in reporting missed or late detected diaphragmatic injuries. Therefore, our study's aim was to investigate the prevalence of traumatic diaphragmatic injury in the thoracoabdominal trauma, discuss the etiological factors, diagnostic investigations, and outcomes in TDIs, and evaluate predictors of mortality in patients who were diagnosed at King Abdulaziz Medical City in Riyadh, Saudi Arabia. Materials and methods This observational retrospective cohort study was conducted at King Abdulaziz Medical City (KAMC), a tertiary hospital in Riyadh, Saudi Arabia. The study included all adult patients aged 18 years or older diagnosed with traumatic diaphragmatic injuries between the years 2016 and 2020. The BESTCare electronic system was used to get the patient's medical records and extract the data. Pearson χ2 test was used for categorical variables, and an independent t-test was used for continuous variables to investigate the association between predictors and outcomes.  Results A total of eight patients were involved in this study. The mean age of the patients was 49 years old. Males outnumbered females by 75%. Patients admitted with blunt injuries were greater by 75% compared to penetrating injuries by 25%. The left side of the diaphragm was the most common site of injury. The total number of patients who were admitted to the ICU was five, four of whom had blunt trauma and one had a penetrating injury. Conclusion The demographic data of the patients included in this study corresponded to that in the literature. Although not reaching a statistically significant level, ICU admissions and mortality were mostly associated with blunt injuries. Larger multi-center studies are required to further investigate the incidence of traumatic diaphragmatic injuries (TDI).