Vitamin D levels and bone mineral density: a prospective cross-sectional analysis of young orthopedic trauma patients at a rural United States trauma center.

Purpose: The goal of this cross-sectional study was to investigate the prevalence of vitamin D deficiency in young orthopedic trauma patients and its impact on bone mineral density (BMD) measured through computed tomography imaging of the lumbar spine.

Methods: Conducted at a level I trauma center, this prospective cross-sectional analysis included 100 patients aged 18 to 50 years with non-fragility fractures. Vitamin D levels and Hounsfield units of the lumbar spine were recorded from computed tomography scans.

Continuously tuneable single electrode pair liquid crystal optical vortex generators.

In this work, we demonstrate the use of two-photon polymerization direct laser writing in the production of continuously tuneable optical vortex beam (OV) generators in a liquid crystal (LC) layer sandwiched between glass substrates. Results are presented that show how an OV generator can be inscribed into a 20 μm-thick LC layer and how the order of the OV beam can be tuned with the application of a voltage. Importantly, only a single pair of electrodes is needed to tune the order of the vortex as the required phase profile is generated through the 3D structuring of the polymer network using the laser writing process.

'Once that's worn off, we could discuss whether you need more': provider perspectives on communicating with patients and other providers about prescription opioids.

Background: Prescriber-patient communication plays a crucial role in understanding patients' needs, while reducing risks for developing an opioid use disorder (OUD), yet research on this is sparse. As such, the need to understand healthcare providers' skills, comfort, and confidence when discussing opioids with patients and other providers is an important step in balancing patients' needs from a pain perspective and risks from an OUD perspective.

Method: We interviewed 32 Massachusetts providers (physicians, physician associates, nurse practitioners, and dental practitioners) to assess their communication strategies with patients and other providers.

Topological protection of optical skyrmions through complex media.

Optical Skyrmions have many important properties that make them ideal units for high-density data applications, including the ability to carry digital information through a discrete topological number and the independence of spatially varying polarization to other dimensions. More importantly, the topological nature of the optical Skyrmion heuristically suggests a strong degree of robustness to perturbations, which is crucial for reliably carrying information in noisy environments. However, the study of the topological robustness of optical Skyrmions is still in its infancy.