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
Application of electrosurgery in gastrointestinal endoscopy
With the continuous advancement in medical device technology, minimally invasive surgery has become the cornerstone of modern surgical practices. At the forefront of this evolution is the fusion of medical endoscopes wit...
Review of gait prediction of lower extremity exoskeleton robot
In recent years, gait prediction has gradually become a cutting-edge research direction in the fields of biomechanics and artificial intelligence. Gait prediction technology, which analyzes an individual’s walking patter...
Research progress and applications of image defogging algorithms
Images taken under hazy weather conditions suffer from problems such as blurring, low contrast, and low saturation due to the scattering of atmospheric light by aerosol particles in the air, which affects the performance...
Research progress on medical ultrasound image segmentation algorithms
Medical ultrasound imaging is an integral part of preoperative diagnosis, lesion screening and ultrasound-guided interventional surgeries. Image segmentation techniques can enhance the identification of lesions and separ...
Advancements in finite element analysis for prosthodontics
Finite element analysis (FEA) is a computer-aided tool widely employed in the field of prosthodontics, offering a comprehensive understanding of biomechanical behavior and assisting in the design and evaluation of dental...