NCT06082297

Evaluation in 15 Participants of Blood Flow, Comfort and Efficiency, Using 1 vs 36 Hz Stimulation Via Textile Electrodes

Can Blood Flow Enhancing Plantar Flexion Electrically Induced Via Textile Electrodes in a Sock Using 1 Hz Frequency Give Better Comfort and Energy Efficiency as Compared to 36 Hz ?

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 15 (actual)
• Sponsor: Karolinska University Hospital · Academic / Other
• Sex: All
• Age: 18 Years – 99 Years
• Healthy volunteers: Accepted

Summary

Muscle contractions induced by calf low-intensity neuromuscular electrical stimulation (C-LI-NMES) can increase venous return and may reduce venous thromboembolism. This study aimed to compare the effect of different C-LI-NMES frequencies and plateau times on hemodynamics, discomfort and energy efficiency, when applied via sock-integrated transverse textile electrodes.

Detailed description

Fifteen healthy participants were stimulated via two 3x3cm transverse textile electrodes integrated in a sock, with ten different combinations of frequency (1Hz or 36Hz) and plateau times (0.5/1.5/3/5/7s), with gradually increasing NMES-intensity until plantar flexion-induction. At this point, popliteal peak venous velocity (PVV), time-averaged mean velocity (TAMV) and ejection volume (EV) were assessed by Doppler-ultrasound, discomfort by a numerical rating scale (NRS, 0-10) and values for current amplitude and energy were calculated based on the NMES-device´s intensity level. Values expressed with median (interquartile range), significance set to p\<0.05.

Conditions

• Hemodynamic Instability
• Pain

Interventions

Type	Name	Description
DEVICE	Chattanooga Physio, DJO, neuromuscular electrical stimulation	Neuromuscular electrical stimulation (NMES) was applied with a device called Chattanooga Physio (DJO), testing 10 different combinations of parameter-settings. The parameter-settings that were varied and combined were frequency (1Hz and 36Hz) and plateau times (0.5s, 1.5s, 3s, 5s, 7s). The NMES was applied to the calf of the participants via transversally placed textile electrodes (3x3 cm) integrated in a sock starting with very low current amplitude followed by gradual small increases in current amplitude until induction of ankle plantar flexion, at which time-point the outcomes where measured.

Timeline

• Start date: 2019-07-17
• Primary completion: 2019-08-13
• Completion: 2019-08-13
• First posted: 2023-10-13
• Last updated: 2023-10-13

Locations

1 site across 1 country: Sweden