Convened under the auspicious of esteemed endorsers - ISTA

Barbara Maestri - university of rome sapienza - rome, italyedoardo monaco - university - rome, italyCarmelo D'arrigo - university la sapienza - rome, italyandrea ferretti - university - rome, italy*Email: a.speranza75@virgilio.itManual postoperative CT calculation of anteversion and inclination of the acetabular cup canbe inaccurate and depends on the observer’s experience. The aim of this study is to describe andpresent a validation of a new CT-image-based dedicate software (EGIT) for calculation of theacetabular component placement.The software principle is based on a three-dimensional reconstruction of a patient’s bones fromanatomical data collected postoperatively on the patient’s CT scan.15 Patient to be operated for THR were enrolled in this study. All patients were evaluated withpost operative CT-scan. Measurement of Cup positioning were performed with two differentmethods: a manual method, performed by an expert radiologist, and a software CT image basedmethod. Statistical analysis was performed with Intraclass Correlation Coefficent to assesinterobserver and intraobserver reliability. A paired T-test was used to detect differencesbetween manual and software methods.The Intraclass Correlation Coefficient was excellent for both the intraobserver andinterobserver reliability. As expected the ICC is higher in the interobserver case.A mean cup anteversion of 14.2 (S.D. ±6.9), mean inclination of 44.2 (S.D.± 5.8) are detectedwith EGIT by the expert surgeon; Mean Cup anteversion of 13.6 (S.D. ± 5.11), mean inclinationof 43.3 (S.D.± 5.1) are detected with manual method by expert radiologist. No statisticaldifference have been found (P> 0.05).The EGIT software seems to be an easy, accurate and reproducible method to calculateacetabular cup positioning using standard post-operative CT scan in THA.Friday, October 8, 2010, 14:00-14:50Session A14: Complication ManagementDirected Air Flow to Reduce Airborne Particulate and BacterialContamination in the Surgical Field During Total Hip ArthroplastyGregory Stocks - Fondren Orthopedic Group - Houston, USA*Daniel O'Connor - University of Houston - Houston, USASean Self - Nimbic Systems, Inc. - Houston, USAGeoff Marcek - Nimbic Systems, Inc. - Houston, USABrandon Thompson - Fondren Orthopedic Group - Houston, USAfile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]