OBJECTIVES: The purpose of this study was to determine the accuracy and reproducibility of image intensifier (fluoroscopic) measurements of gap and step-off displacements on the articular surface of the distal radius using a standard cadaver osteotomy fracture model. METHODS: Fourteen orthopedic residents were randomly assigned using the fish bowl method to measure the gap and step-off displacements in cadaveric fluoroscopic images using a digital caliper. Each physician was randomly assigned the images where they examined the images twice and the average taken using a standard technique. The interobserver and intra-observer reliability were calculated using the intraclass correlation coefficient (ICC). Rank Sum test was used to evaluate the validity of measurements. RESULTS: The results of the study showed that there was no significant difference between the cadaveric and measured step-off and gap displacements. Intraclass correlation coefficient scores showed moderate (0.41) to perfect (1.0) agreement. CONCLUSION The study showed that fluoroscopy can aid in the interpretation of gap and step-off displacements in acute distal radius fractures.

BACKGROUND: Previous Caucasian studies have described venous thromboembolism in pregnancy; however, little is known about its incidence during pregnancy and early postpartum period in the Chinese population. We investigated the risk of venous thromboembolism in a “real-world” cohort of pregnant Chinese women with no prior history of venous thromboembolism. METHODS: In this observational study, 15,325 pregnancies were identified in 14,162 Chinese women at Queen Mary Hospital, Hong Kong between January 2004 and September 2016. Demographic data, obstetric information, and laboratory and imaging data were retrieved and reviewed. RESULTS: The mean age at pregnancy was 32.4±5.3 years, and the median age was 33 years (interquartile range, 29–36 yr). Pre-existing or newly diagnosed diabetes mellitus was present in 627 women (4.1%); 359 (0.7%) women had pre-existing or newly detected hypertension. There was a small number of women with pre-existing heart disease and/or rheumatic conditions. Most deliveries (86.0%) were normal vaginal; the remaining were Cesarean section 2,146 (14.0%). The incidence of venous thromboembolism was 0.4 per 1,000 pregnancies, of which 83.3% were deep vein thrombosis and 16.7% were pulmonary embolism. In contrast to previous studies, 66.7% of venous thrombosis occurred in the first trimester. CONCLUSION: Chinese women had a substantially lower risk of venous thromboembolism during pregnancy and the postpartum period compared to that of Caucasians. The occurrence of pregnancy-related venous thromboembolism was largely confined to the early pregnancy period, probably related to the adoption of thromboprophylaxis, a lower rate of Cesarean section, and early mobilization.
Asian Continental Ancestry Group ; Cesarean Section ; Cohort Studies ; Diabetes Mellitus ; Early Ambulation ; Female ; Heart Diseases ; Hong Kong ; Humans ; Hypertension ; Incidence ; Observational Study ; Postpartum Period ; Pregnancy ; Pregnancy Trimester, First ; Pregnant Women ; Pulmonary Embolism ; Venous Thromboembolism ; Venous Thrombosis