scholarly journals An ultrasound-guided percutaneous nerve stimulation regimen based on finite element modeling for median nerve rupture

2021 ◽  
Author(s):  
xiaolei chu ◽  
Xizi Song ◽  
Yuru Li ◽  
Ziren Wu ◽  
Qi Li ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Grip Strength ◽  
Median Nerve ◽  
Nerve Stimulation ◽  
Functional Score ◽  
Control Group ◽  
Element Modeling ◽  
Experimental Group ◽  
Stimulation Regimen

Abstract Object: In order to promote the functional recovery of median nerve rupture patients, this paper proposes an ultrasound-guided percutaneous nerve stimulation regimen based on finite element modeling. Method: First, according to anatomy feature, a multi-layer human forearm model is constructed. What’s more, taking current density and activate function as optimization indicators, the percutaneous nerve stimulation regimen is designed with finite element modeling, including electrical needle angel, distance and position. Finally, to test the performance of designed regimen, a total of 22 patients with median nerve rupture participate in the clinical randomized controlled trial. And the clinical treatment effect is evaluated with BMRC, grip strength, functional score of median nerve and DASH scores. Results: The designed percutaneous nerve stimulation regimen is that, parallel to each other, electrical needles are located at both ends of the injury nerve with a distance of 3 cm. Besides, clinical trial results show that, after treatment the difference in sensory function was statistically significant. In terms of motor function, the BMRC of motor and grip strength are improved in both groups after treatment and there are significant differences between groups. Besides the grip strength improvement of experimental group is 4 times higher than that of control group. On global function, the DASH scores are reduced by 29% with experimental group but only 8% with control group; functional score of median nerve improved by 24% in the experimental group and by 22% in the control group, but the difference between groups is statistically significant after treatment. Conclusion: Clinical trial results demonstrate that the designed percutaneous nerve stimulation regimen can significantly improve the sensory, motor and global function of median nerve rupture, which is a potential clinical treatment regimen. Trial registration: ChiCTR, ChiCTR2000030790. Registered14 march 2020, http://www.chictr.org.cn/ChiCTR2000030790

scholarly journals Effect of Right Median Nerve Stimulation on Level of Consciousness in Traumatic Brain Injury Subjects

2016 ◽  
Vol 8 (3) ◽  
pp. 67
Author(s):  
Sirisha Nekkanti ◽  
Rahul Shaik ◽  
Srinivas Mondem ◽  
Nandini Meruva ◽  
Gunathevan Elumalai
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Median Nerve ◽  
Nerve Stimulation ◽  
Control Group ◽  
Coma Scale ◽  
Median Nerve Stimulation ◽  
Significant Difference ◽  
Level Of Consciousness ◽  
Experimental Group

<p class="Default"><strong>Background</strong>: The median nerve serves a peripheral gateway to the central nervous system. Median nerve stimulation is positively associated with regaining the level of consciousness in patients with traumatic brain injury, but the level of evidence is still a research question. So the purpose of the study is to find out the effectiveness of right median nerve stimulation on the level of consciousness and the relation between them in subjects with traumatic brain injury.<strong> Methodology: </strong>Twenty subjects with traumatic brain injury of axonal type were selected for study and randomized into two groups. Experimental group received right median nerve stimulation along with medications where as control group received medications only one month, 30 minutes a day. Glasgow coma scale is used to assess the changes in conscious levels<strong>. Result: </strong>The results have revealed that there is significance improvement noted in experimental group when compared to control group. Comparison  of Glassgow coma scale scores between experimental and control groups after one month showed significant difference with a P value 0.0261.<strong> Conclusion: </strong>Right median nerve stimulation is strongly associated with improvement of consciousness in patients with traumatic brain injury.</p><p><strong> </strong></p><p><strong> </strong></p>

Exact First Order Finite Element Modeling for Eddy Current NDE

1991 ◽  
Vol 3 (1) ◽  
pp. 235-253 ◽  
Author(s):  
L. D. Philipp ◽  
Q. H. Nguyen ◽  
D. D. Derkacht ◽  
D. J. Lynch ◽  
A. Mahmood
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Eddy Current ◽  
Element Modeling ◽  
First Order ◽  
Eddy Current Nde

Tire Vibration Modes and Effects on Vehicle Ride Quality

1993 ◽  
Vol 21 (1) ◽  
pp. 23-39 ◽  
Author(s):  
R. W. Scavuzzo ◽  
T. R. Richards ◽  
L. T. Charek
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Operating Conditions ◽  
Modal Testing ◽  
Ride Quality ◽  
Vibration Modes ◽  
Inflation Pressure ◽  
Passenger Cars ◽  
Element Modeling ◽  
Road Surfaces

Abstract Tire vibration modes are known to play a key role in vehicle ride, for applications ranging from passenger cars to earthmover equipment. Inputs to the tire such as discrete impacts (harshness), rough road surfaces, tire nonuniformities, and tread patterns can potentially excite tire vibration modes. Many parameters affect the frequency of tire vibration modes: tire size, tire construction, inflation pressure, and operating conditions such as speed, load, and temperature. This paper discusses the influence of these parameters on tire vibration modes and describes how these tire modes influence vehicle ride quality. Results from both finite element modeling and modal testing are discussed.

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