Publications by authors named "Mark Isabelle"

Objectives: To evaluate clinical decision support (CDS) of varying complexities and care settings represented using Health Information Technology (HIT) standards-Clinical Quality Language (CQL) for representing clinical logic and Fast Healthcare Interoperability Resources (FHIR) for health information exchange.

Materials And Methods: This Institutional Review Board-approved, retrospective study was performed at an academic medical center (January 1, 2023-December 31, 2023). Recommendations extracted from patient-centered outcomes guidelines were translated into standardized syntax (SNOMED CT) and representations (CQL, FHIR).

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Purpose: The aims of this study were to determine whether point-of-order clinical decision support (CDS) based on the Wells criteria improves CT pulmonary angiography (CTPA) yield and utilization in hospitalized patients in an enterprise-wide health system and to identify yield-related factors.

Methods: This retrospective, institutional review board-approved, cross-sectional study in an urban, multi-institution health system included hospitalized patients undergoing CTPA 12 months before and after CDS implementation (entire cohort). The χ test was used to compare pulmonary embolism (PE) yield in patients in whom providers overrode versus followed CDS alerts after CDS implementation.

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Objective: To determine the volume of intravenous iodinated contrast media used for CT before, during, and after the global iohexol shortage over a total of 17 months at a multisite health system.

Methods: This retrospective study included all patients who underwent CT at a large health system with 12 sites. Standardized contrast doses for 13 CT examinations were implemented May 23, 2022.

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Objective: Currently, CT pulmonary angiogram (CTPA) for evaluating acute pulmonary embolism (PE) in emergency departments (EDs) is overused and with low yields. The goal of this study is to assess the impact of an evidence-based clinical decision support (CDS) tool, aimed at optimizing appropriate use of CTPA for evaluating PE.

Methods: The study was performed at EDs in a large health care system and included nine academic and community hospitals.

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Article Synopsis
  • Multi-parametric magnetic resonance imaging (mpMRI) is a key method for detecting significant prostate cancer, and this study explores if adding a 400-variant polygenic risk score (PRS) enhances its effectiveness.
  • Analyzing data from 24,617 men, it was found that those in the top PRS quartile had a higher likelihood of having clinically significant prostate cancer compared to those in the bottom quartile.
  • Utilizing the PRS in a biopsy selection scenario reduced the chances of missing clinically significant cancers, suggesting its potential to improve cancer detection outcomes.
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Although solid-state nuclear magnetic resonance (NMR) is a versatile analytical tool to study polymorphs and phase transitions of pharmaceutical molecules and products, this work summarizes examples of spontaneous and unexpected (and unwanted) structural rearrangements and phase transitions (amorphous-to-crystalline and crystalline-to-crystalline) under magic angle spinning (MAS) conditions, some of them clearly being due to the pressure experienced by the samples. It is widely known that such changes can often be detected by X-ray powder diffraction (XRPD); here, the capability of solid-state NMR experiments with a special focus on H- C frequency-switched Lee-Goldburg heteronuclear correlation (FSLG HETCOR)/MAS NMR experiments to detect even subtle changes on a molecular level not observable by conventional 1D NMR experiments or XRPD is presented. Furthermore, it is shown that a polymorphic impurity combined with MAS can induce a crystalline-to-crystalline phase transition.

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