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Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients
Published on: April 12, 2011
Effects of passive blood-flow-restriction and electromyostimulation on ICU-acquired weakness (ICUAW): a study
Alexander Franz1,2, Katharina Friederike Wolf3,4, Julika Behrens3,4
1Department of Orthopedics and Trauma Surgery, University Hospital Bonn, Venusberg-Campus 1, Bonn, 53127 , Germany. alexander.franz@ukbonn.de.
Insights
This study explores passive physiotherapy, including blood flow restriction/ischemic preconditioning (BFR/IPC) and electromyostimulation (EStim), to combat intensive care unit-acquired weakness (ICUAW). Findings will assess feasibility and efficacy for muscle preservation in critical care patients.
Area of Science:
- Critical care medicine
- Physical therapy
- Muscle physiology
Background:
- Intensive care unit-acquired weakness (ICUAW) is common in critically ill patients, leading to muscle loss and prolonged recovery.
- Current early mobilization guidelines face logistical challenges and show limited efficacy in preventing ICUAW.
- There is a need for resource-efficient, non-invasive interventions to preserve muscle mass in sedated or immobile ICU patients.
Purpose of the Study:
- To assess the feasibility, safety, and clinical efficacy of passive physiotherapy interventions for muscle preservation in ICU patients.
- To evaluate blood flow restriction/ischemic preconditioning (BFR/IPC) and electromyostimulation (EStim) as potential treatments for ICUAW.
- To provide foundational data for future multicenter trials on passive rehabilitation in critical care.
Main Methods:
- A prospective, randomized controlled trial involving 120 surgical ICU patients with ICU stays >48 hours.
- Patients randomized into four groups: Sham-Control, BFR/IPC, EStim, and combined BFR/IPC + EStim.
- Primary endpoints: feasibility and safety (compliance, stress response). Secondary endpoints: ICU length of stay, ICUAW prevalence, muscle mass, and rehabilitation efficacy, assessed via non-invasive measures and microdialysis.
Main Results:
- Feasibility and safety metrics (patient compliance, stress response) will be assessed.
- Clinical outcomes including ICU length of stay and ICUAW prevalence will be evaluated.
- Muscle mass preservation and rehabilitation efficacy will be measured using non-invasive techniques and intramuscular microdialysis.
Conclusions:
- Existing data on BFR/IPC and EStim efficacy in ICU populations are limited, highlighting the need for this research.
- This study will provide crucial data on the viability of passive physiotherapy techniques for mitigating ICUAW.
- Successful findings could lead to improved patient outcomes, reduced healthcare costs, and inform larger clinical trials.
Background:
Intensive care unit-acquired weakness (ICUAW) is a prevalent secondary disorder in critically ill patients, characterized by significant loss of muscle mass and strength, often leading to prolonged ICU stays, increased mortality, and reduced post-discharge quality of life. Despite guidelines recommending early mobilization, logistical challenges and inconclusive efficacy have limited its impact on ICUAW prevalence. This study aims to assess the feasibility, safety, and clinical efficacy of exclusively passive physiotherapeutic interventions, including blood flow restriction/ischemic preconditioning (BFR/IPC) and electromyostimulation (EStim), as potential alternatives for muscle preservation in ICU patients who are often sedated or unable to participate in active rehabilitation.
Methods:
This prospective, randomized controlled trial will recruit 120 patients from the surgical ICU at the University Hospital Bonn, who meet the inclusion criteria of a > 48-h ICU stay. Patients will be randomized into four groups: Sham-Control, BFR/IPC, EStim, and combined BFR/IPC + EStim. The study's primary endpoints include feasibility and safety metrics, such as patient compliance and stress response, alongside secondary endpoints related to clinical outcomes like ICU length of stay, ICUAW prevalence, muscle mass preservation, and rehabilitation efficacy. Measurements include non-invasive assessments of muscle mass, intramuscular microdialysis to monitor metabolic and inflammatory markers, and health-related quality of life evaluations post-discharge.
Discussion:
Preliminary literature and a systematic review underscore the need for resource-efficient, non-invasive interventions in ICU settings. BFR/IPC and EStim present promising results, but existing data on their efficacy in ICU populations are limited. This study's findings will provide foundational data on the viability of passive physiotherapy techniques in ICU settings, potentially improving patient outcomes and reducing healthcare costs associated with prolonged ICU stays. If successful, these results will inform a multicenter randomized trial to further evaluate these interventions. This research represents a crucial step in developing feasible rehabilitation protocols to mitigate ICUAW, addressing a critical gap in critical care management and rehabilitation.
Trial Registration:
ClinicalTrials.gov DRKS00033592. Registered on March 05, 2024.
