Staged Management for Distal Femur Fractures: Impacts on Reoperation, Stiffness, and Overall Outcomes.

Objectives: To evaluate the outcomes of staged management with external fixation (ex-fix) before definitive fixation of distal femur fractures.

Design: Retrospective cohort.

Setting: Single Level I Trauma Center.

Lower Extremity Amputation in Fracture-Related Infection.

Objectives: To analyze demographics, comorbidities, fracture characteristics, presenting characteristics, microbiology, and treatment course of patients with fracture-related infections (FRIs) to determine risk factors leading to amputation.

Design: Retrospective cohort.

Setting: Single Level I Trauma Center (2013-2020).

Effects of Obesity on Systemic Complications After Operative Pelvic Ring Fractures.

Objectives: To determine the effect of obesity on systemic complications after operative pelvic ring injuries.

Design: Retrospective cohort study.

Setting: Single level 1 trauma center.

Risk factors for dysfunctional elbow stiffness following operative fixation of distal humerus fractures.

Background: Elbow stiffness is 1 of the most common complications after operative fixation of distal humerus fractures; however, there is relatively limited literature assessing which factors are associated with this problem. The purpose of this study is to identify risk factors associated with dysfunctional elbow stiffness in distal humerus fractures after operative fixation.

Methods: A retrospective review of all distal humerus fractures that underwent operative fixation (AO/OTA 13A-C) at a single level 1 trauma center from November 2014 to October 2021.

Structured bubbling in vibrated gas-fluidized beds of binary granular particles: experiments and simulations.

Mixing and segregation of granular particles on the basis of size and density from vertical vibration or upward gas flow is critical to a wide range of industrial, agricultural and natural processes. Recently, combined vibration and gas flow under certain conditions has been shown to create periodically repeating structured bubbling patterns within a fluidized bed of spherical, monodisperse particles. Here, we demonstrate with experiments and simulations that structured bubbling can form in binary mixtures of particles with different size and density, but with similar minimum fluidization velocities.