Background: Proper positioning of osseous tunnels during single bundle arthroscopic ACL reconstruction, which gives reproducibly good clinical outcome, is a matter of concern. Little evidence is there correlating tunnel position in arthroscopic ACL reconstruction with their clinical outcome in Indian population. Our aim in this study was to examine if the radiological tunnel-positions were significantly associated to the clinical outcomes. Methods: ACL reconstruction was performed in 147 young patients with an isolated ACL tear. They were followed up prospectively for the next two years. Clinical assessment of each patient was done using the International Knee Documentation Committee (IKDC) evaluation form before surgery and at two years later the surgery. At the same time, the radiological assessment was done on standard digital radiographs. Results: Considering the anterior and posterior-most points on the Blumensaat's line as 0% and 100% respectively the average position of the femoral tunnel was at 84.8%. Similarly, the tibial tunnel was at 46.8% along the tibial plateau. On the coronal plane the average position of the tibial tunnel was at 45.6% point along the tibial plateau (measured from the medial-most point towards laterally). The mean position of the femoral tunnel in the coronal plane was at 43.2% along the broadest part of the distal femur (measured from the lateral extent). The average inclination angle of the graft measured 19.6 (along the coronal plane). Conclusion: Ideal clinical outcome was significantly associated with the placement of the femoral tunnel along the sagittal plane. Placement of the femoral tunnel should not be beyond the 85% mark along the Blumensaat's line from the anterior-most point. No correlation was established between clinical results and any of the remaining radiological parameters described above.

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Background: Among the various techniques used for ankle arthrodesis, Ilizarov technique has various advantages along with the potential for treating complex and failed cases.Methods: Eleven cases were undertaken for ankle arthrodesis using the Ilizarov fixator. Two rings were applied along the tibia and one at the talus/calcaneum. The articular cartilage was denuded, and dynamic compression applied. The clinical, functional and radiological outcome were evaluated. The goal was a stable fusion with a well aligned foot.Results: The mean follow-up period was 95 weeks. Fusion was achieved in all cases with no major complication. Only one case had a residual deformity. The average time interval for the ankle fusion was 140.8±25.7 days. The postoperative modified American Orthopaedic Foot and Ankle Society (AOFAS) Hindfoot score was 67.5±9.6 points.Conclusions: Ilizarov assisted ankle arthrodesis aids in early weight bearing, better alignment, and has good functional outcomes even in cases with previously failed procedures. It has the advantage of postoperative readjustment of the arthrodesis without the need of any second procedure with no major complications.

The COVID-19 pandemic has led to an unprecedented change in transportation, including shared mobility services. This study examined the effects of the COVID-19 pandemic on ridesourcing usage by leveraging two years (2019 and 2020) of daily ridesourcing trip data in Chicago, Illinois. The study employed a set of Random Effects Panel models to examine the factors contributing to changes in ridesourcing usage before and during the pandemic and how the COVID-19 related policies issued by the state and local agencies affected ridesourcing trips. Results show: i) a considerable drop in total daily trips, total daily trip distances, and total daily trip durations was observed once the stay-at-home order was issued, while an increase in average daily trip distances was evident during the stay-at-home period; ii) the south and west parts of Chicago experienced a relatively larger increase in ridesourcing services during the reopen-I period than the stay-at-home and reopen-II periods; iii) areas with higher employment density produced fewer ridesourcing trips during the pandemic while it was the opposite during the pre-pandemic period; iv) areas with higher median income households, higher employment density, and more rail stations experienced a greater decrease in the change of daily total ridesourcing trips, total trip distances, and total trip durations during the periods of state of emergency and stay-at-home orders. Results of this study provide insights for the policymakers and ridesourcing operators to better respond to an unprecedented crisis like the COVID-19 pandemic and help them to rebuild the ridesourcing ridership in the post-pandemic era.

Knee joints comprised of the distal femur, proximal tibia & patella. Injuries of the knee must be treated properly to maintain a good knee function. Fractures of the tibia plateau represent 1% of all fractures and approximately 8% of fractures occurring in the elderly. The aim was tostudy the “functional outcome of treatment of closed schatzker type V and type VI tibial plateau fractures using locking compression plate”. In this study, twenty patients with tibia plateau fractures who presented to our casualty were studied. All the patients were victims of road traffic accidents. Once they were thermodynamically stable, were clinically examined and assessed for associated injuries.Out of 11 patients with Type VI fractures, 4(36%) had excellent results, 4(36%) had good results, 2(18%) had fair results and 1(9%) had poor results. The poor result was due to the associated pelvic injury, which interrupted the regular post-op rehabilitation. Out of 9 patients with type V fractures, 2(22%) had excellent results and 7(78%) had good results according to Rasmussen Radiologic Assessment. Hence,early mobilization is absolutely essential for preventing the knee stiffness & for quick articular cartilage regeneration. Weight-bearing should be delayed until solid union to prevent the articular collapse.

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