Person: González Seguel, Felipe
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González Seguel
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Felipe
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Felipe Andrés González Seguel
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Publication Critical illness myopathy and trajectory of recovery in acute kidney injury requiring continuous renal replacement therapy: a prospective observational trial protocol(2023) J Pedro Teixeira, J. Pedro; Griffin, Benjamin R.; Pal, Chaitanya Anil; González Seguel, Felipe; Jenkins, Nathanial; Jones, Beth M.; Yoshida, Yuri; George, Naomi; Israel, Hayley Puffer; Ghazi, Lama; Neyra, Javier A.; Mayer, Kirby P.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. However, the impact of AKI- RRT on skeletal muscle mass and function during and following critical illness remains unknown. We hypothesise that patients with AKI- RRT have higher degrees of acute muscle loss than patients without AKI- RRT and that AKI- RRT survivors are less likely to recover muscle mass and function when compared with other ICU survivors. Methods and analysis This protocol describes a prospective, multicentre, observational trial assessing skeletal muscle size, quality and function in ICU patients with AKI- RRT. We will perform musculoskeletal ultrasound to longitudinally evaluate rectus femoris size and quality at baseline (within 48 hours of CRRT initiation), day 3, day 7 or at ICU discharge, at hospital discharge, and 1–3 months postdischarge. Additional skeletal muscle and physical function tests will be performed at hospital discharge and postdischarge follow- up. We will analyse the effect of AKI- RRT by comparing the findings in enrolled subjects to historical controls of critically ill patients without AKI- RRT using multivariable modelling. Ethics and dissemination We anticipate our study will reveal that AKI- RRT is associated with greater degrees of muscle loss and dysfunction along with impaired postdischarge recovery of physical function. These findings could impact the in- hospital and postdischarge treatment plan for these patients to include focused attention on muscle strength and function. We intend to disseminate findings to participants, healthcare professionals, the public and other relevant groups via conference resentation and publication without any publication restrictions.Publication Trajectories of Recovery after ACutE and cRitical illness (TRACER): a prospective observational study protocol(González-Seguel F, Summers LA, Fresenko LE, Long DE, Scott LN, Slone SA, Shankara Bhaktula S, Wen Y, Miller BF, Morris PE, Salyer AL, Kalema AG, Montgomery-Yates AA, Dupont-Versteegden EE, Mayer KP; TRACER study group Collaborators. Trajectories of Recovery after ACutE and cRitical illness (TRACER): a prospective observational study protocol, 2025) González Seguel, Felipe; Summers, Louisa; Fresenko, Lindsey; Long, Douglas; Scott, Logan; Slone, Stacey; Shankara, Srushan; Wen, Yuan; Miller, Benjamin; Morris, Peter; Salyer, Amy; Kalema, Anna; Montgomery, Ashley; Dupont, Esther; Mayer, KirbyIntroduction: Patients who survive admission to intensive care unit (ICU) for critical illness are at high risk of developing muscle atrophy and weakness, commonly diagnosed as ICU-acquired weakness (ICUAW). The development of ICUAW is closely linked to long-term symptoms and impairments known as post-intensive care syndrome (PICS). Despite heightened recognition of impairments, there is limited research supporting effective interventions to improve muscle and physical outcomes after hospital discharge. Prior to developing and testing interventions for ICU survivors, it is imperative to understand the trajectory of muscle and physical function recovery following an ICU stay. The purpose of this study is to longitudinally investigate skeletal muscle health and physical function outcomes after ICU admission. Methods and analysis: This protocol describes a single site, prospective, observational study in adult patients who have survived a critical illness (ie, sepsis or acute respiratory failure). Patients will participate in a battery of testing including primary outcomes: muscle power and physical function; and secondary outcomes: muscle strength, muscle size, endurance and physical activity (by accelerometry) at hospital discharge and 3, 6, and 12 months post-discharge. A subset of patients will participate in muscle biopsy and venipuncture. To examine if the trajectory of recovery predicts primary outcomes, we will perform multivariate linear regression models in 150 evaluable patients. To examine differences in molecular and cellular outcomes in plasma and muscle tissue, a control group of community-dwelling adults without history of an ICU stay will be enrolled as a comparator group. Enrolment started on 18 October 2022 with an estimated completion date of 1 August 2027. Ethics and dissemination: This protocol was approved by the University of Kentucky Office of Research Integrity Medical Internal Review Board (# 77407), with patients providing informed written consent. We anticipate our findings to establish recovery trajectories, improving the classification of patients who experience sustained physical disability. Improved identification of recovery trajectories of muscle and physical function enables future studies to employ an individually targeted rehabilitation approach, that is, precision medicine, with the goal of improving patient outcomes. The cellular findings will support the development of novel interventions specifically designed for detecting underlying mechanisms. We intend to disseminate findings to patients, healthcare professionals, the public and other relevant groups via conference presentations and manuscripts without publication restrictions.