Browsing by Author "George, Naomi"
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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.Item Intensive Care Unit-Acquired Weakness in Patients With Acute Kidney Injury: A Contemporary Review(2022) Teixeira, Pedro; Mayer, Kirby; Griffin, Benjamin; George, Naomi; Jenkins, Nathaniel; Pal, Anil; González, Felipe; Neyra, JavierAcute 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. We begin our review with the epidemiology of AKI in the ICU and of ICU-AW, highlighting emerging data suggesting that AKI and AKI treated with kidney replacement therapy (AKI-KRT) may independently contribute to the development of ICU-AW. We then delve into human and animal data exploring the pathophysiologic mechanisms linking AKI and acute KRT to muscle wasting, including altered amino acid and protein metabolism, inflammatory signaling, and deleterious removal of micronutrients by KRT. We next discuss the currently available interventions that may mitigate the risk of ICU-AW in patients with AKI and AKI-KRT. We conclude that additional studies are needed to better characterize the epidemiologic and pathophysiologic relationship between AKI, AKI-KRT, and ICU-AW and to prospectively test interventions to improve the long-term functional status and quality of life of AKI survivors.