Publications by authors named "M A Chappell"

Feedback is an essential part of continuous quality improvement of cases used in medical curricula. This report describes results of qualitative analysis of feedback to elucidate what worked well and what needed improvement from the lens of our pre-clerkship medical students. Complexity, realism, and use of media were themes identified as strengths.

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Utilizing data from the Vitamin C, Thiamine, and Steroids in Sepsis (VICTAS) Trial, this hub model was developed to limit seventeen Renin-Angiotensin-Aldosterone System (RAAS) components as three entrance and four exits, to facilitate the calculation of a model as one egress unknown, the angiotensin type 1 (AT1) receptor. Following previous evidence relating renin levels to mortality, this study found controls were more like sepsis patients with levels < renin quartile 1 (Q1) for calculated AT1, while more like sepsis patients with renin levels > quartile 3 (Q4) for measured aldosterone levels. Additionally differential discrete correlate summation (DCS) analysis indicates AT1, aldosterone and renin as major hub nodes in this independent DCS model of metabolic data inputs.

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Neurotoxicity investigations of inhaled organophosphorus pesticide (OP), ethyl-parathion (EP), were conducted in Sprague Dawley rats comparing exposures to EP volatilized at 0, 1, 10, and 20mg/m versus EP incorporated into soil dust (5mg/m) at 0, 0.0095, 0.09, and 0.

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Sepsis and septic shock are global healthcare problems associated with high mortality rates.  Activation of the renin-angiotensin-aldosterone system (RAAS) is an early event in sepsis and elevated renin may be predictive of worse outcomes.  In a subset of sepsis patients enrolled in the Vitamin C, Thiamine, and Steroids in Sepsis (VICTAS) trial, active renin (median value > 189 pg/mL or 5.

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