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Tennis Elbow Diagnosis Using Equivalent Uniform Voltage to Fit the Logistic and the Probit Diseased Probability Models.

Lee TF, Lin WC, Wang HY, Lin SY, Wu LF, Guo SS, Huang HJ, Ting HM, Chao PJ - Biomed Res Int (2015)

Bottom Line: TV50 is the threshold equivalent uniform voltage predicting a 50% risk of disease.The fitted DP parameters were TV50 = 153.0 mV (CI: 136.3-169.7 mV), γ 50 = 0.84 (CI: 0.78-0.90) and TV50 = 155.6 mV (CI: 138.9-172.4 mV), m = 0.54 (CI: 0.49-0.59) for logistic and probit models, respectively.When the EUV ≥ 153 mV, the DP of the patient is greater than 50% and vice versa.

View Article: PubMed Central - PubMed

Affiliation: Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Applied Sciences, 415 Chien Kung Road, San-Min District, Kaohsiung 80778, Taiwan.

ABSTRACT
To develop the logistic and the probit models to analyse electromyographic (EMG) equivalent uniform voltage- (EUV-) response for the tenderness of tennis elbow. In total, 78 hands from 39 subjects were enrolled. In this study, surface EMG (sEMG) signal is obtained by an innovative device with electrodes over forearm region. The analytical endpoint was defined as Visual Analog Score (VAS) 3+ tenderness of tennis elbow. The logistic and the probit diseased probability (DP) models were established for the VAS score and EMG absolute voltage-time histograms (AVTH). TV50 is the threshold equivalent uniform voltage predicting a 50% risk of disease. Twenty-one out of 78 samples (27%) developed VAS 3+ tenderness of tennis elbow reported by the subject and confirmed by the physician. The fitted DP parameters were TV50 = 153.0 mV (CI: 136.3-169.7 mV), γ 50 = 0.84 (CI: 0.78-0.90) and TV50 = 155.6 mV (CI: 138.9-172.4 mV), m = 0.54 (CI: 0.49-0.59) for logistic and probit models, respectively. When the EUV ≥ 153 mV, the DP of the patient is greater than 50% and vice versa. The logistic and the probit models are valuable tools to predict the DP of VAS 3+ tenderness of tennis elbow.

No MeSH data available.


Related in: MedlinePlus

Setup of our devices for surface EMG signal acquisition when (a) wrist in flexion and (b) extension position, EMG signal acquisition module (EMG-01, Raising Technology Co., Ltd., Kaohsiung, Taiwan).
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fig3: Setup of our devices for surface EMG signal acquisition when (a) wrist in flexion and (b) extension position, EMG signal acquisition module (EMG-01, Raising Technology Co., Ltd., Kaohsiung, Taiwan).

Mentions: Subject in test was told to hold fist. Then active wrist flexion extension was asked to perform by patient himself. One cycle of range-of-motion (ROM) is defined as one flexion and one extension. Wrist position in flexion and extension is shown in left part of Figure 3. The duration of one cycle was kept to around 1.3 seconds. Total ten cycles around 13 s was recorded. The other side upper limb was repeated as the same protocol.


Tennis Elbow Diagnosis Using Equivalent Uniform Voltage to Fit the Logistic and the Probit Diseased Probability Models.

Lee TF, Lin WC, Wang HY, Lin SY, Wu LF, Guo SS, Huang HJ, Ting HM, Chao PJ - Biomed Res Int (2015)

Setup of our devices for surface EMG signal acquisition when (a) wrist in flexion and (b) extension position, EMG signal acquisition module (EMG-01, Raising Technology Co., Ltd., Kaohsiung, Taiwan).
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4561943&req=5

fig3: Setup of our devices for surface EMG signal acquisition when (a) wrist in flexion and (b) extension position, EMG signal acquisition module (EMG-01, Raising Technology Co., Ltd., Kaohsiung, Taiwan).
Mentions: Subject in test was told to hold fist. Then active wrist flexion extension was asked to perform by patient himself. One cycle of range-of-motion (ROM) is defined as one flexion and one extension. Wrist position in flexion and extension is shown in left part of Figure 3. The duration of one cycle was kept to around 1.3 seconds. Total ten cycles around 13 s was recorded. The other side upper limb was repeated as the same protocol.

Bottom Line: TV50 is the threshold equivalent uniform voltage predicting a 50% risk of disease.The fitted DP parameters were TV50 = 153.0 mV (CI: 136.3-169.7 mV), γ 50 = 0.84 (CI: 0.78-0.90) and TV50 = 155.6 mV (CI: 138.9-172.4 mV), m = 0.54 (CI: 0.49-0.59) for logistic and probit models, respectively.When the EUV ≥ 153 mV, the DP of the patient is greater than 50% and vice versa.

View Article: PubMed Central - PubMed

Affiliation: Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Applied Sciences, 415 Chien Kung Road, San-Min District, Kaohsiung 80778, Taiwan.

ABSTRACT
To develop the logistic and the probit models to analyse electromyographic (EMG) equivalent uniform voltage- (EUV-) response for the tenderness of tennis elbow. In total, 78 hands from 39 subjects were enrolled. In this study, surface EMG (sEMG) signal is obtained by an innovative device with electrodes over forearm region. The analytical endpoint was defined as Visual Analog Score (VAS) 3+ tenderness of tennis elbow. The logistic and the probit diseased probability (DP) models were established for the VAS score and EMG absolute voltage-time histograms (AVTH). TV50 is the threshold equivalent uniform voltage predicting a 50% risk of disease. Twenty-one out of 78 samples (27%) developed VAS 3+ tenderness of tennis elbow reported by the subject and confirmed by the physician. The fitted DP parameters were TV50 = 153.0 mV (CI: 136.3-169.7 mV), γ 50 = 0.84 (CI: 0.78-0.90) and TV50 = 155.6 mV (CI: 138.9-172.4 mV), m = 0.54 (CI: 0.49-0.59) for logistic and probit models, respectively. When the EUV ≥ 153 mV, the DP of the patient is greater than 50% and vice versa. The logistic and the probit models are valuable tools to predict the DP of VAS 3+ tenderness of tennis elbow.

No MeSH data available.


Related in: MedlinePlus