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Post-tracheotomy swallowing function has not been well described in the pediatric population. This study aims to (1) determine differences in swallowing functioning pre- and post-tracheotomy and (2) examine the association between postoperative dysphagia and indication for tracheotomy, age at the time of tracheotomy, and time between tracheotomy and modified barium swallow (MBS). A retrospective chart review was performed on 752 patients who underwent a tracheotomy from 2003 to 2018 and had adequate documentation for review. Patients were included if they received a post-operative MBS. Descriptive statistics, logistic regression, and Fisher's exact test were used to analyze the data. The cohort included 233 patients. The mean age at the time of tracheotomy was 25 months (±50.5). The indications for the tracheotomy were upper airway obstruction (110/233, 47.2%), chronic respiratory failure (104/233, 44.6%), and neurologic disease (19/233, 8.2%). The mean time from tracheotomy to post-operative MBS was 224 days (±297.7). Of the patients who had documented pre- and post-tracheotomy diets, nearly half of patients had improvement in their swallowing function after tracheotomy placement (82/195; 42.1%). Post-tracheotomy MBS recommended thickened liquids in 30.9% of the patients (72/233) and 42.5% (99/233) were recommended thin liquids. The remainder (62/233, 26.6%) remained nothing by mouth (NPO). Patients with neurological disease as the indication for the tracheotomy were more likely to remain NPO ( = .039). A tracheotomy can functionally and anatomically affect swallowing in pediatric patients. The majority of our studied cohort was able to resume some form of an oral diet postoperatively based on MBS. This study highlights the need for objective measurements of swallowing in the postoperative tracheotomy patient to allow for safe and timely commencement of an oral diet. Level 3. Level 3.Aim Numerous drugs are being widely prescribed for COVID-19 treatment without any direct evidence for the drug safety/efficacy in patients across diverse ethnic populations. https://www.selleckchem.com/products/ozanimod-rpc1063.html Materials & methods We analyzed whole genomes of 1029 Indian individuals (IndiGen) to understand the extent of drug-gene (pharmacogenetic), drug-drug and drug-drug-gene interactions associated with COVID-19 therapy in the Indian population. Results We identified 30 clinically significant pharmacogenetic variants and 73 predicted deleterious pharmacogenetic variants. COVID-19-associated pharmacogenes were substantially overlapped with those of metabolic disorder therapeutics. CYP3A4, ABCB1 and ALB are the most shared pharmacogenes. Fifteen COVID-19 therapeutics were predicted as likely drug-drug interaction candidates when used with four CYP inhibitor drugs. Conclusion Our findings provide actionable insights for future validation studies and improved clinical decisions for COVID-19 therapy in Indians.Natural hyperbolic materials with dielectric permittivities of opposite signs along different principal axes can confine long-wavelength electromagnetic waves down to the nanoscale, well below the diffraction limit. Confined electromagnetic waves coupled to phonons in hyperbolic dielectrics including hexagonal boron nitride (hBN) and α-MoO3 are referred to as hyperbolic phonon polaritons (HPPs). HPP dissipation at ambient conditions is substantial, and its fundamental limits remain unexplored. Here, we exploit cryogenic nanoinfrared imaging to investigate propagating HPPs in isotopically pure hBN and naturally abundant α-MoO3 crystals. Close to liquid-nitrogen temperatures, losses for HPPs in isotopic hBN drop significantly, resulting in propagation lengths in excess of 8 μm, with lifetimes exceeding 5 ps, thereby surpassing prior reports on such highly confined polaritonic modes. Our nanoscale, temperature-dependent imaging reveals the relevance of acoustic phonons in HPP damping and will be instrumental in mitigating such losses for miniaturized mid-infrared technologies operating at liquid-nitrogen temperatures.Over the last 5 years, metal halide perovskites (MHPs) have emerged as promising photocatalysts for CO2 reduction because of their extraodinary visible-light-harvesting capabilities and appropriate band structure. However, the CO2 photoreduction activity of pristine MHPs is still unsatisfactory because of the phase instability, serious radiative recombination, and insufficient surface-active sites. This Perspective summarizes the strategies employed in recent studies for enhancing the photocatalytic CO2 reduction performance of MHPs from the standpoint of structure engineering, which includes composition/dimension regulation, surface modification, and heterostructure construction. The relationship between the structure (composition, dimension, and shape) and photocatalytic performance is established, which is instructive for exploiting highly efficient perovskite-based photocatalysts in artificial photosynthesis applications. Further, some important challenges and future prospects of MHPs in this field are proposed and discussed.Fluoride-based compounds doped with rare-earth cations are the preferred choice of materials to achieve efficient upconversion, of interest for a plethora of applications ranging from bioimaging to energy harvesting. Herein, we demonstrate a simple route to fabricate bright upconverting films that are transparent, self-standing, flexible, and emit different colors. Starting from the solvothermal synthesis of uniform and colloidally stable yttrium fluoride nanoparticles doped with Yb3+ and Er3+, Ho3+, or Tm3+, we find the experimental conditions to process the nanophosphors as optical quality films of controlled thickness between few hundreds of nanometers and several micrometers. A thorough analysis of both structural and photophysical properties of films annealed at different temperatures reveals a tradeoff between the oxidation of the matrix, which transitions through an oxyfluoride crystal phase, and the efficiency of the upconversion photoluminescence process. It represents a significant step forward in the understanding of the fundamental properties of upconverting materials and can be leveraged for the optimization of upconversion systems in general. We prove bright multicolor upconversion photoluminescence in oxyfluoride-based phosphor transparent films upon excitation with a 980 nm laser for both rigid and flexible versions of the layers, being possible to use the latter to coat surfaces of arbitrary shape. Our results pave the way toward the development of upconverting coatings that can be conveniently integrated in applications that demand a large degree of versatility.
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