Publications by authors named "W R Klein"
Purpose: To evaluate real-world outcomes in subjects with pre-existing neovascular age-related macular degeneration (AMD) undergoing intravitreal avacincaptad pegol (IVA) treatment for geographic atrophy (GA).
Methods: This study was undertaken as a retrospective, case-controlled assessment of patients undergoing IVA treatment for GA from 2 community-based retina practices. Patients were separated into 1) a Study Group consisting of subjects with pre-existing neovascular AMD prior to initiation of IVA for GA, and 2) a Control Group consisting of AMD subjects without neovascularization prior to initiation of IVA for GA.
Yield validation of dinitrogen reduction reaction (NRR) catalysts with N isotope labeling experiments is frustrated by the high cost of N and the frequent occurrence of NH and NO impurities in commercial N sources. Also, gas diffusion electrode (GDE) cell architectures are relevant to scaling NRR but underexplored and limited by ex situ product analysis methods. To overcome these obstacles, we develop and demonstrate a protocol for NRR catalyst testing using a scalable GDE cell architecture and specialized test station that facilitates in-line product analysis with multiturn time-of-flight mass spectrometry.
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- Establishing immediate vascular access is essential in emergency situations for administering fluids, blood products, and medications; intraosseous (IO) access is considered a viable alternative when IV access fails, particularly in acute care settings for children.
- A retrospective study conducted in a level 1 trauma center from 2015 to 2020 analyzed the efficacy of IO access, revealing a high success rate of 88% overall, but lower success (71-84%) for children under 18 compared to adults (94%).
- The study concluded that while IO access is generally effective and safe across various demographics and settings, extra caution is necessary for infants under six months due to lower success rates.
Testudines possess a rigid shell that influences the mechanics of the respiratory system. We studied respiratory mechanics in the terrestrial red-footed tortoise Chelonoidis carbonarius (Cryptodira), comparing juvenile individuals with a less ossified and more flexible carapace with adults with a well-ossified rigid shell. Combined with these ontogenetic differences, we analyzed respiratory system mechanics with animals in a supine and a prone position, as well as in the isolated lungs, to evaluate the impact of the viscera on breathing mechanics.
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