Barzilai University Medical Center

88 Research Day 2020 Barzilai University Medical Center 63 DIAGNOSING ANKLE LIGAMENT TEAR BY COMPERING X-RAY AND CT SCAN WITH STANDARD ACCEPTED PARAMETERS. Maria Oulianski, Evgenia Cherniavsky, Omri Lubovsky Department of Orthopedy, Barzilai University Medical Center, Ashkelon Faculty of Health Studies, Ben Gurion University of the Negev, Beer Sheva, Israel Background Diagnosis of syndesmotic tear made by radiographic imaging x-rays and CT scans. The ability to correctly identify the tear may help to find other fractures involving the articulate surfaces and help in the decision regarding the treatment. Only part of the patients undergoes CT scans in each ankle injury due to time and cost and radiological exposure. Hypothesis Reliability of diagnosing syndesmotic injury based on x-ray in comparison to CT scan. Less misdiagnosed injuries with the use of CT scans. Objectives Two different observers retrospectively evaluated 52 radiologic images of patients with and without syndesmotic injury compering the x-ray parameters and the CT evaluation. Results We have found that patients that undergo a syndesmotic injury had a CT scan were 3.125+-1.26mm in comparison to 2.37+-0.71mm for patients without injury (p <0.05). LCS had shown a significant difference for patients with tear 3.2170+-1.05398 compared to 2.5556+-0.70199mm without tear (p<0.05). TFJ did not show a significant correlation between the two groups (2.4404+-0.4660mm vs. 2.2748+-0.56866mm). There was complete agreement between the two observers. Normalization standards for investigated patients presented in Table1. Conclusions It had shown that the current definition of syndesmotic tear is occurring above 4 mm based on the LCS parameters. Our measurement had shown an agreement between CT scans and x-ray. All patients with LSC above 4mm had a ligament rupture. MCS and TFJ parameters found to be less effective predictors for the diagnosis of ligament rupture; thus, they are less critical in the consideration regarding ng the treatment plan. Some patients had shown results less than 4mm LSC lag on x-rays but found to have ligament tear on CT scan, thus suggesting a possible misdiagnosis can affect their future treatment plan and the recovery. CT scans may be used in selected cases of the doubt for the definite diagnosis.