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KMID : 0350819880030010112
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Seoul Journal of Nursing
1988 Volume.3 No. 1 p.112 ~ p.112
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Interrelations between EMG Activities, Subjective Pain rates and Observers´ Pain Evaluation under Painful Electrical Stimulations
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You, Chung Hee
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Abstract
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Since pain has mainly been measured by subjective verbal self-report, response distortion has possibly affected pain assessment.
In this regard, there is an urgent need to develop an objective pain evaluation tool such as a measurement of non-verbal behavior.
The present study was undertaken to identify
the interrelations of EMG activities of facial corrugator muscle, subjective pain rates using VAS(Visual Analog Scale), and observers´ pain evaluation using VAS under the varing intensities of painful electrical stimulation and compare these three tools of pain assessment and discriminate the most sensitive tool among them.
Twenty rt. handed female undergraduate students having no hospitalization experience, consented to participate in the experiment.
The results obtained were as follows:
A. The relationship between intensities of elec-
trical stimulation and the various pain res-
ponses are:
1. The degree of It. corrugator muscle activities as measured by EMG activity increased with 5 different levels of intensities of electrical stimulation at the 5% level,
2. Subjective pain rates as measured by VAS increased with 4 different levels of intensities of electrical stimulation at the 5% level, and
3. The level of observers´ evaluation of the subject pains increased with 4 different levels of intensities of electrical stimulation at the 5%, level.
B. Interrelations between the EMG activities, subjective pain rates, and objective pain evaluation are:
4. The EMG activities are correlated with subjective pain rates. (r=0.4370, p=0.001)
5´ The EMG activities are correlated with observers´ pain evaluation. (r=0.6691, p= 0.001)
6. The subjective pain rates are correlated with the observers´ Dain evaluation. (r=0.5817, p=0. 001)
C. Sensitivity test:
Subjective pain rates were most sensitive to discriminating the painful electrical stimulations at the 5% level.
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