Cephalexin is increasingly used as initial and oral transition therapy for severe infections, but optimal dosing in this setting remains uncertain.MethodsFour cephalexin pharmacokinetic (PK) datasets spanning preterm neonates through young adults were pooled to develop a unified population PK model. Simulations estimated probability of target attainment (PTA) and cumulative fractional response (CFR, target attainment weighted across the pathogen MIC distribution) across fT>MIC targets (free drug time above the minimum inhibitory concentration), MIC distributions for methicillin-susceptible Staphylococcus aureus (MSSA) and Enterobacterales, and multiple dosing regimens.ResultsSeventy-one subjects (age 9 days-29 years) contributed 360 plasma samples, best described by a one-compartment model with first-order absorption and lag time. Apparent volume and clearance scaled with fat-free mass, and clearance increased with post-menstrual age. Absorption was slower in neonates. Cephalexin 25 mg/kg/dose, maximum 1,000 mg, every 8 hours achieved 1-log kill targets for MSSA (PTA ≥98% for 35% fT>MIC at MIC = 4 mg/L); every 6-hour dosing was needed at MIC = 8 mg/L. For Enterobacterales, a 60% fT>MIC target was achieved only in infants <2 months. However, higher-dose regimens (37.5-50 mg/kg, maximum 1,500 mg, every 6 hours) achieved CFRs >90% for 40-50% fT>MIC targets when cefazolin MICs were ≤2 mg/L.ConclusionsCephalexin PK varies with age but is well-captured by a unified size- and maturation-scaled model. These data support dosing within the FDA-approved range for systemic MSSA infections. Higher-dose regimens are necessary for adequate target attainment against Enterobacterales. Appropriately dosed cephalexin represents a viable option for selected severe infections, including oral transition therapy.

MM Simulations teases LGSK Skiathos Airport for Microsoft Flight Simulator 2024, while its latest MSFS20/24 airports are currently up to 30% off at simMARKET.

How generating short unique IDs in Python led me to the birthday paradox and Monte Carlo simulations

A new study by researchers at the University of Copenhagen suggests that the ultimate fate of massive dying stars, whether they become supernovae or collapse directly into black holes, may hinge on an

Discover how digital elevation models for flood risk assessment revolutionize hydrological modeling, inundation mapping, and disaster management.

Some elected leaders are drafting legal filings or holding simulations to prepare for possible federal intervention at the polls.

A healthcare simulation technician (HST) is a multifaceted role that relies on a broad range of knowledge. The addition of a healthcare simulation technician (HST) to a simulation-based healthcare education team can have a positive impact on the team’s ability to deliver quality simulations. A simulation technician typically has a core set of responsibilities such as event setup and breakdown, cleaning and evaluating any equipment used during the simulation, audiovisual support for courses, and any on-site simulator maintenance. Outside of these core responsibilities, HST’s engage in many other responsibilities based on the type of center and the programs supported by that center. However, identifying the training needs of HSTs is hampered by a lack of a clear understanding of the competency requirements of the role. A survey of simulation center directors found that only 2% of respondents found adequately qualified HSTs from an application pool. Creativity, out-of-the-box thinking, agility, and flexibility are just some of the characteristics ideal for a HST position and propose that hiring an artist or creative, and building an organizational culture that allows time and space conducive to creativity, innovation and on the job training has the potential to shape the Sim Tech position according to the needs of the simulation education team while also developing the individual professionally. The presenter will share several modifications, methods, best practices, innovations and work arounds developed during his journey as a simulation technician and creative specialist and how a background in the arts helped pave the way to a Master of science in healthcare simulation. Learning Objectives: Identity the knowledge, skills and attitude competencies conducive to success as a simulation technician candidate for your education team. Explore areas of simulation center operations where Simulation Techs can thrive outside of day to day equipment maintenance and core responsibilities. Discover methods, innovations and the importance of collaboration between educators, content experts in the early stages of scenario design.

Extreme El Niño events are among the most consequential climate phenomena, yet their early prediction remains challenging. Here, by analyzing the 1982/1983, 1997/1998, and 2015/2016 events together with a large ensemble of climate model simulations, we ...

An international team used NAOJ's ATERUI III to show how a newborn black hole could look like one of Webb's little red dots. NAOJ's Japanese release says 'closing in'; its English one says 'explained.'