Publications by authors named "Kirby P Mayer"

Purpose: Acute kidney injury (AKI) requiring continuous kidney replacement therapy (CKRT) has been hypothesized to increase the risk of developing intensive care unit-associated weakness (ICU-AW), but prospective data are lacking.

Materials And Methods: This prospective observational study evaluated critically ill adults with AKI requiring CKRT at two U.S.

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Importance: Outcome measures (OMs) are an integral part of physical therapist practice and implementation can have a multifaceted effect on care delivery.

Objective: The objective of this project was to identify a core set of OMs for adults requiring acute care hospitalization in the setting of acute care physical therapist practice.

Design And Setting: This Clinical Practice Guideline (CPG) focuses on the assessment of physical function within the "activity" domain of the International Classification of Functioning, Disability and Health.

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Muscle ultrasound has high utility in clinical practice and research; however, the main challenges are the training and time required for manual analysis to achieve objective quantification of muscle size and quality. We aimed to develop and validate a software tool powered by artificial intelligence (AI) by measuring its consistency and comparability of expert manual analysis quantifying lower limb muscle ultrasound images. Quadriceps complex (QC) and tibialis anterior (TA) muscle images of healthy, intensive care unit, and/or lung cancer participants were captured with portable devices.

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Objective: To explore the incidence of falls and associated risk factors in the first year after hospital discharge in survivors of critical illness.

Design: Prospective single-site observational study.

Setting: University-affiliated mixed ICU.

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Early diagnosis of muscle wasting in critically ill patients with acute kidney injury requiring continuous kidney replacement therapy (AKI-CKRT) may improve outcomes timely rehabilitation and nutrition. Muscle ultrasound (MUS) has recently gained traction for assessing muscle atrophy in the intensive care unit (ICU) but requires training to achieve reproducibility. We evaluated the inter-rater reliability of MUS in patients with AKI-CKRT performed by multidisciplinary raters including nephrologists.

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Purpose Of Review: The effects of either physical rehabilitation or nutrition on outcomes in patients with critical illness are variable and remain unclear. The potential for the combination of exercise and nutritional delivered concurrently to provide benefit is provocative, but data are only emerging. Herein, we provide a summary of evidence from 2023 and 2024 on combined physical rehabilitation and nutrition during and following critical illness.

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During critical illness, patients experience significant and rapid onsets of muscle wasting and dysfunction with loss of strength, mass, and power. These deficits often persist long after the ICU, leading to impairments in physical function including reduced exercise capacity and increased frailty and disability. While there are numerous studies describing the epidemiology of impaired muscle and physical function in the ICU, there are significantly fewer data investigating mechanisms of prolonged and persistent impairments in ICU survivors.

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Article Synopsis
  • - The study focuses on understanding the rehabilitation pathways for patients recovering from critical illnesses, emphasizing the importance of social determinants of health (SDOH) in accessing and utilizing these rehabilitation services.
  • - A systematic review of literature revealed that only 4 out of 72 studies provided detailed information on rehabilitation usage among adult survivors, with a significant number of studies being cohort-based and retrospective in nature.
  • - The findings highlighted that most patients were discharged directly home, with race/ethnicity being the most reported SDOH, indicating the need for attention to these factors to improve long-term recovery outcomes.
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Article Synopsis
  • Patients who survive critical illness may experience long-term physical problems associated with Post Intensive Care Syndrome, affecting their quality of life and daily activities.
  • Although there is potential for recovery, patient characteristics and illness factors can predict physical function outcomes, guiding intervention strategies.
  • Early screening and ongoing assessment of physical impairments after leaving the ICU is crucial for developing personalized treatment plans to support recovery.*
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Objectives: Persistent skeletal muscle dysfunction in survivors of critical illness due to acute respiratory failure is common, but biological data elucidating underlying mechanisms are limited. The objective of this study was to elucidate the prevalence of skeletal muscle weakness and fatigue in survivors of critical illness due to COVID-19 and determine if cellular changes associate with persistent skeletal muscle dysfunction.

Design: A prospective observational study in two phases: 1) survivors of critical COVID-19 participating in physical outcome measures while attending an ICU Recovery Clinic at short-term follow-up and 2) a nested cohort of patients performed comprehensive muscle and physical function assessments with a muscle biopsy; data were compared with non-COVID controls.

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Article Synopsis
  • The study looks at how physical rehabilitation affects the outcomes for critically ill COVID-19 patients in the ICU, focusing on dosage and patient recovery.
  • This retrospective analysis included 3,780 adults and measured factors like mortality, discharge status, and physical function upon leaving the hospital.
  • Findings show that increased early rehabilitation correlates with improved physical function at discharge, particularly in patients who did not need mechanical ventilation.
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Objective: to examine the relationship between physical rehabilitation parameters including a novel approach to quantifying dosage with hospital outcomes for patients with critical COVID-19.

Design: Retrospective practice analysis from March 5, 2020, to April 15, 2021.

Setting: Intensive care units (ICU) at four medical institutions.

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Introduction/aims: Muscle ultrasound has high utility in clinical practice and research; however, the main challenges are the training and time required for manual analysis to achieve objective quantification of morphometry. This study aimed to develop and validate a software tool powered by artificial intelligence (AI) by measuring its consistency and predictability of expert manual analysis quantifying lower limb muscle ultrasound images across healthy, acute, and chronic illness subjects.

Methods: Quadriceps complex (QC [rectus femoris and vastus intermedius]) and tibialis anterior (TA) muscle ultrasound images of healthy, intensive care unit, and/or lung cancer subjects were captured with portable devices.

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Objective: To determine whether age, mobility level, and change in mobility level across the first 3 physical rehabilitation sessions associate with clinical outcomes of patients who are critically ill.

Design: Retrospective, observational cohort study.

Setting: Medical Intensive Care Unit (MICU).

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The purpose was to investigate the content, construct, and criterion validity of muscle ultrasound in a mixed cohort of participants recovering from mild and critical COVID-19. A secondary analysis of a prospective cross-sectional study was conducted on data obtained from a battery of muscle and physical function assessments including a muscle biopsy and muscle ultrasonography (US). Rectus femoris (RF) muscle thickness (mT), quadricep complex (QC) mT, RF muscle cross-sectional area (CSA) using 2D freeform trace and estimated from Feret's diameter, and RF echo intensity (EI) were assessed with US.

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Background: Patients who are critically ill may receive suboptimal nutrition that leads to weight loss and increased risk of functional deficits.

Methods: Our overarching hypothesis is that nutrition in the intensive care unit (ICU) and the early recovery phase associates with functional outcomes at short-term follow-up. We enrolled adult patients who attended the University of Kentucky ICU recovery clinic (ICU-RC) from November 2021 to June 2022.

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The Society of Critical Care Medicine (SCCM) Reviewer Academy seeks to train and establish a community of trusted, reliable, and skilled peer reviewers with diverse backgrounds and interests to promote high-quality reviews for each of the SCCM journals. Goals of the Academy include building accessible resources to highlight qualities of excellent manuscript reviews; educating and mentoring a diverse group of healthcare professionals; and establishing and upholding standards for insightful and informative reviews. This manuscript will map the mission of the Reviewer Academy with a succinct summary of the importance of peer review, process of reviewing a manuscript, and the expected ethical standards of reviewers.

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Introduction: Acute kidney injury requiring renal replacement therapy (AKI-RRT) is common in the intensive care unit (ICU) and is associated with significant morbidity and mortality. Continuous RRT (CRRT) non-selectively removes large amounts of amino acids from plasma, lowering serum amino acid concentrations and potentially depleting total-body amino acid stores. Therefore, the morbidity and mortality associated with AKI-RRT may be partly mediated through accelerated skeletal muscle atrophy and resulting muscle weakness.

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The purpose was to examine patient-centered outcomes and the occurrence of lung fibrotic changes on Chest computed tomography (CT) imaging following pneumonia-related acute respiratory distress syndrome (ARDS). We sought to investigate outpatient clinic chest CT imaging in survivors of COVID19-related ARDS and non-COVID-related ARDS, to determine group differences and explore relationships between lung fibrotic changes and functional outcomes. A retrospective practice analysis of electronic health records at an ICU Recovery Clinic in a tertiary academic medical center was performed in adult patients surviving ARDS due to COVID-19 and non-COVID etiologies.

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Importance: Individuals who survived COVID-19 often report persistent symptoms, disabilities, and financial consequences. However, national longitudinal estimates of symptom burden remain limited.

Objective: To measure the incidence and changes over time in symptoms, disability, and financial status after COVID-19-related hospitalization.

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Objective: We sought to determine the impact of right ventricular dysfunction on the outcomes of mechanically ventilated patients with COVID-19 requiring veno-venous extracorporeal membrane oxygenation.

Methods: Six academic centers conducted a retrospective analysis of mechanically ventilated patients with COVID-19 stratified by support with veno-venous extracorporeal membrane oxygenation during the first wave of the pandemic (March to August 2020). Echocardiograms performed for clinical indications were reviewed for right and left ventricular function.

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Background And Purpose: Transcranial ultrasonography (TCU) can be a useful diagnostic tool in evaluating intracranial pathology in patients with limited or delayed access to routine neuroimaging in critical care or austere settings. We reviewed available literature investigating the diagnostic utility of TCU for detecting pediatric and adult patient's intracranial pathology in patients with intact skulls and reported diagnostic accuracy measures.

Methods: We performed a systematic review of PubMed , Cochrane Library, Embase , Scopus , Web of Science™, and Cumulative Index to Nursing and Allied Health Literature databases to identify articles evaluating ultrasound-based detection of intracranial pathology in comparison to routine imaging using broad Medical Subject Heading sets.

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Objective: Significant variations exist in the use of respiratory muscle ultrasound in intensive care with no society-level consensus on the optimal methodology. This systematic review aims to evaluate, synthesize, and compare the clinimetric properties of different image acquisition and analysis methodologies.

Data Sources: Systematic search of five databases up to November 24, 2021.

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Acute kidney injury (AKI) and intensive care unit-acquired weakness (ICU-AW) are 2 frequent complications of critical illness that, until recently, have been considered unrelated processes. The adverse impact of AKI on ICU mortality is clear, but its relationship with muscle weakness-a major source of ICU morbidity-has not been fully elucidated. Furthermore, improving ICU survival rates have refocused the field of intensive care toward improving long-term functional outcomes of ICU survivors.

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Article Synopsis
  • The FIRE CORAL study is a multicenter observational cohort research project that focuses on the recovery from COVID-19 after hospitalization, specifically looking at functional, imaging, and respiratory outcomes.
  • The study involves in-person follow-ups and assessments of participants’ pulmonary function, lung imaging, and overall physical status, taking place 3 to 9 months post-hospitalization.
  • The primary goal is to evaluate the feasibility of ongoing assessments and to analyze data regarding COVID-19 recovery, including identifying factors that may influence the recovery process.
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