Bone Morphology and Vascular Supply of Pedicled Distal Radius Bone Using Nano-Computed Tomography.

BACKGROUND: The goal of this study was to use nano-computed tomography to describe the intraosseous vascularity and structural characteristics of commonly used distal radius vascularized bone grafts for treatment of scaphoid nonunion. METHODS: We obtained 8 fresh frozen human cadaver forearm specimens for infusion of barium contrast. Specimens were scanned and segmented to quantify the vascular volume and trabecular density within 3 common graft regions, including 1, 2 intercompartmental supraretinacular artery (1,2 ICSRA), fourth extensor compartment artery (4 ECA), and volar carpal artery (VCA), as well as thirds of the scaphoid. Outcomes also included mean and maximum cortical thickness and number of cortical perforators. Single-specimen analyses were also performed comparing vascularity and trabecular density of each graft with scaphoid regions of a single specimen. Statistical analysis was performed using analysis of variance with post hoc Tukey testing when P value was less than .05. RESULTS: There was no significant difference between groups in the mean percent vascularity (P = .76). The ratio of trabecular bone in each graft to scaphoid thirds was less than 1. The mean cortical thickness (0.79 mm, 95% confidence interval [CI], 0.66-0.93 mm) and maximum cortical thickness (1.45 mm, 95% CI, 1.27-1.63 mm) of VCA grafts were both significantly greater than those of 4 ECA and 1,2 ICSRA (P < .001). CONCLUSIONS: There were no differences between vascular density of the 3 grafts and the scaphoid. Pedicled distal radius bone grafts have similar vascularity but morphometric differences such as cortical thickness and trabecular density which have unclear clinical implications.

Optimizing the Use of Operating Rooms by Transitioning Common Hand Surgeries Into the Office Setting.

PURPOSE: The purpose of this study was to examine the true monetary implications, at the health system level, of moving simple hand procedures, performed with wide-awake local anesthesia no tourniquet surgery, from the ambulatory surgery center (ASC) to office setting. METHODS: We analyzed the costs, revenues, case times, and patient demographics for 2 cohorts of patients who underwent hand and non-hand surgical procedures over a 2-year period. We calculated the mean margin per minute for the top 5 procedures in non-hand orthopedic surgery subgroups, complex plastics hand, and non-hand plastic surgery. We then calculated the following: (1) hours operating room or ASC time gained by moving hand procedures to the office, (2) additional subgroup patients theoretically treated by using the ASC hours gained, and (3) net margin (in dollars) because of additional procedures. RESULTS: Six board-certified hand surgeons performed 623 simple ASC and 808 in-office procedures, consisting of 795 carpal tunnel releases, 84 first dorsal compartment releases, and 446 trigger finger releases. The net margin per minute for simple ASC and in-office hand procedures was $25.01/min and $5.63/min, respectively. In the office setting, hand surgery freed up 821 hours of ASC time, which could be theoretically used to treat over 300 additional patients awaiting outpatient orthopedic hand or plastic surgery. Depending on the subspecialty and type of substituted cases, the theoretical net margin varied from -$150,413 to $3.9 million. CONCLUSIONS: Transitioning simple hand operations out of ASCs realized a mean cost savings of 82% per case ($1,137 vs $206) and effectively opened 821 additional hours of operating room time over a 2-year period. CLINICAL RELEVANCE: Transitioning simple hand operations out of the operating room setting and into the office setting reduces the cost of hand surgical care, improves operating room access for alternate procedures or patients, and validates the sustainability of safe and effective wide-awake local anesthesia no tourniquet surgery from a hospital system's financial standpoint.

Electrodiagnostic Studies in Degenerative Cervical Myelopathy.

The diagnosis of degenerative cervical myelopathy can generally be made with a thorough history, physical examination, and spinal imaging. Electrodiagnostic studies, consisting of nerve conduction studies and electromyography, are a useful adjunct when the clinical picture is inconsistent or there is concern for overlapping pathology. Electrodiagnostic studies may be particularly helpful in identifying cases of myeloradiculopathy, when there is combined nerve root and spinal cord injury, both with regards to prognosis and guiding surgical treatment. Electrodiagnostic studies are a useful adjunct for the spine surgeon and should be used when there are features atypical for degenerative cervical myelopathy or when there is suspicion for a concomitant disease process.

A global analysis of the impact of COVID-19 stay-at-home restrictions on crime.

The stay-at-home restrictions to control the spread of COVID-19 led to unparalleled sudden change in daily life, but it is unclear how they affected urban crime globally. We collected data on daily counts of crime in 27 cities across 23 countries in the Americas, Europe, the Middle East and Asia. We conducted interrupted time series analyses to assess the impact of stay-at-home restrictions on different types of crime in each city. Our findings show that the stay-at-home policies were associated with a considerable drop in urban crime, but with substantial variation across cities and types of crime. Meta-regression results showed that more stringent restrictions over movement in public space were predictive of larger declines in crime.