An investigation of upper extremity impedance modeling and sensory thresholds in envelope wave electrical stimulation
Journal Title: Progress in Medical Devices - Year 2024, Vol 2, Issue 4
Abstract
Objectives: To investigate how impedance values and sensory thresholds at various human upper limb sites af fect the parameter settings of electrical stimulation equipment in low and medium frequency envelope electrical stimulation therapy. Methods: The study involved testing different upper limb sites on 22 healthy subjects (ages 21-25, 11 males and 11 females) by adjusting the modulation wave frequency, carrier frequency, and current in tensity of the output. Five types of electrodes of various sizes were used in the tests. Results: The impedance test results for the human upper limb showed a wide range of impedance values across electrodes of different sizes. A new impedance model of the human upper limb was proposed, which accurately fits the relationship between frequency and impedance values. In electrical stimulus sensory experiments, the voltage perception threshold (VPT) introduced in this study was identified as a novel metric for electrical stimulus sensation. Unlike the current perception threshold, VPT does not consider the effects of current magnitude and output frequency. The range of sensory thresholds was 6-8 V, while the suprathreshold was 9-11 V. Neither experiment showed gender differenc es. Conclusions: Determining the value of the power supply and the output intensity of device power amplification circuitry based on the VPT can provide a more precise therapeutic dose for electrical stimulation therapy.
Authors and Affiliations
Renling Zou, Yuhao Liu, Yicai Wu, Liang Zhao, Jigao Dai, Xiufang Hu, Xuezhi Yin
Keywords
Related Articles
- EP ID EP754632
- DOI 10.61189/434505lacrsk
- Views 29
- Downloads 0
Optimization design and performance study of magnesium alloy vascular clamp
Purpose: This study investigates the effects of varying inner diameter of a vascular clamp made from an Mg–Nd–Zn–Zr alloy on its functional performance. The primary objectives are to optimize the clamp’s structure, asses...
Gait prediction for lower limb exoskeleton robots based on real-time adaptive Kalman filtering
This paper presents a gait prediction method for lower limb exoskeleton robots using a real-time adaptive Kalman filtering algorithm. The exoskeleton robot targets two user groups: individuals with impaired lower limb mo...
Research progress on vascular clips for minimally invasive surgery
Minimally invasive surgeries are widely applied due to the advantages of small surgical wound, short postoperative recovery period, and low surgical infection rate. In minimally invasive surgery, vascular clips play a si...
Review of methods for detecting electrode-tissue contact status during atrial fibrillation ablation
Atrial fibrillation is a common cardiac arrhythmia with an annually increasing global prevalence. Ablation of atrial fibrillation is a minimally invasive procedure that treats atrial fibrillation by using a catheter to...
Progress of near-infrared spectroscopy in cerebral blood oxygenation detection: A mini review
In contrast to conventional oximeters, near-infrared spectroscopy-based brain tissue oximetry monitoring devices are capable of non-invasive, continuous, and real-time quantitative monitoring of cerebral oximetry paramet...