Tip relief designed to optimize contact fatigue life of spur gears using adapted PSO and Firefly algorithms.

This paper examines the dynamic performances of circular profile modifications designed to optimize the contact fatigue life of spur gears. It combines the PSO and Firefly metaheuristics to a gear dynamic/degradation model. The objectives are to analyse the ability of optimal corrections to reduce dynamic loads and dynamic transmission error (DTE), and to describe the influence of the modification variables.

Short stay total joint arthroplasty program: patient factors predicting readmission.

Background: The aim of this study was to evaluate the effectiveness of our short stay arthroplasty program as measured by 30-day readmission rate and the rate of transfer to inpatient care. Risk factors for readmission/transfer were also evaluated and contrasted with current patient screening criteria.

Methods: We retrospectively reviewed 297 charts for all primary total joint arthroplasties completed in the short stay program during an 18-month period.

Outcomes of hip and knee total joint arthroplasty in a Canadian inmate population over a 10-year period.

Background: Little information exists regarding the risk of complications in inmates who receive total hip or knee arthroplasties in Canada. Inmates tend to be less healthy owing to socioeconomic factors and an increased number of medical and psychiatric comorbidities. We compared revision and complication rates of total joint replacements in a cohort of incarcerated Canadians versus a cohort of non-inmates.

Heparin-induced thrombocytopenia and thrombosis as an under-diagnosed cause of flap failure in heparin-naive patients: a case report and systematic review of the literature.

Background: Heparin-induced thrombocytopenia and thrombosis (HITT) is an immune complex mediated and potentially devastating cause of flap loss in microvascular surgery. HITT may be an under-reported cause of early-flap failure due to subclinical manifestations at the time of flap loss. A case report of a patient presenting with HITT-related flap failure and the results of a systematic literature review of the clinical presentation of HITT in microsurgery are presented here.