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Feasibility of skeletal muscle biopsy and near-infrared spectrometry in post-ICU patients: the Powerhouse feasibility study

Feasibility of skeletal muscle biopsy and near-infrared spectrometry in post-ICU patients: the Powerhouse feasibility study - Powerhouse Feasibility study

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
NL-OMON
Registry ID
NL-OMON56670
Enrollment
5
Registered
2023-06-22
Start date
2025-06-01
Completion date
Unknown
Last updated
2026-04-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Post-Intensive Care Syndrome Recovery issues after Intensive Care admission

Interventions

None listed

Sponsors

Ziekenhuis Gelderse Vallei
Lead Sponsor

Eligibility

Age
18 Years to 99 Years

Inclusion criteria

Inclusion criteria: 1) >=18 years of age 2) Medical research council (MRC) sum score of at least 24  and less than 48 3) Serum haemoglobin of at least 5.0 mmol/L  4) Admitted to an intensive care unit for at least 48 hours 5) exptected to be  discharged from the ICU within 48 hours 7) Written informed consent

Exclusion criteria

Exclusion criteria: 1) Known mitochondrial disease 2) Pre-existent muscle disease 3) Diabetes Mellitus 4) Life expectancy less than 6 months 5) Visibly high melanin content in the skin 6) Subcutaneous fat layer > 3cm covering the GA muscle (measured by ultrasound) 7) Coagulopathy (i.e. platelet count; 2.0 or recent treatment with therapeutic dosage of low molecular weight heparin) 8) Recent lower extremity surgery 9) Delirium (defined as a delirium observation screening scale (DOS) of at least three) 10) Deemed incompetent to provide well-considered informed consent by the treating physician

Design outcomes

Primary

MeasureTime frame
The primary study endpoint is the feasibility of 3 mm Bergstro*m biopsies of the vastus lateralis muscle and NIRS measurements of the gastrocnemius muscle in post-ICU patients. In order to determine this the following main parameters will be collected: - The acceptability for participation in the study, which is expressed as the number of eligible patients approached for participation in the study and the proportion of included patients as collected in a pre-screenings log. - Results from the questionnaire following NIRS measurements and the muscle biopsy, including pain rate, burden and willingness to undergo a secondary NIRS and/or muscle biopsy at hospital discharge. - The practical feasibility of NIRS measurement and biopsies of skeletal muscles in the post-ICU patient. - Reliability of NIRS assessment of mitochondrial capacity of the GA muscle in post-ICU patients as shown by reliable post-exercise mVO2 recovery curves (R2 > 0.90 by mono-exponential curve fitting).

Secondary

MeasureTime frame
The secondary endpoints include: - Amount of muscle tissue retrieved from a single 3 mm Bergström vastus lateralis muscle biopsy. - Muscle fibre type distribution and size of the vastus lateralis muscle sample of post ICU patients. - (Serious) adverse effects (SAE) following muscle biopsy and NIRS of skeletal muscles. - Quality of the muscle biopsy, as determined by a successful whole genome transcriptome analyses (RNA sequencing) - Re-oxygenation rate measured using NIRS after the release of the occlusion - Variation in NIRS-derived parameters between included subjects

Countries

Netherlands

Contacts

Public ContactARH Van Zanten

Ziekenhuis Gelderse Vallei

zantena@zgv.nl0318 43 4115

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP) · Data processed: May 1, 2026