Document Detail

Effects of mechanical stimulation in measurement of thermal pain threshold.
MedLine Citation:
PMID:  9431705     Owner:  NLM     Status:  MEDLINE    
The improved thermal dolorimeter developed by Fukumoto has made it easy to measure thermal pain thresholds, but mechanical stimulations may be included as the probe is pressed into the skin. In order to evaluate these effects of mechanical stimulation on the improved thermal dolorimeter, the pain threshold temperatures were measured by a probe pressed to the human skin surface with weighting loads from 0.5 to 2.5 kgf. The loads of 2.0-2.5 kgf felt invasive to 8 of the 12 subjects, i.e., they experienced pain and numbness. The threshold temperature of one of these subjects, who developed water blisters around load-added area on the skin after the experiments, exceeded 50 degrees C. The result that no significant difference could be found among the thresholds at the loads of over 2.0 kgf suggests the load of less than 2.0 kgf should be kept to execute proper experiments. In order to investigate other effects on thermal property by compressing, the blood flow was measured when the skin was compressed and three dimensional heat transfer simulations were conducted. The results of the simulations demonstrated that the temperatures of the heat source which were measurable in practice differed approximately 1 to 2 degrees C from the true thresholds. The velocity of heating is also increased and subjects will be given stronger feelings of heating.
T Satoh; I Fukumoto
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Applied human science : journal of physiological anthropology     Volume:  16     ISSN:  1341-3473     ISO Abbreviation:  Appl Human Sci     Publication Date:  1997 Sep 
Date Detail:
Created Date:  1998-02-04     Completed Date:  1998-02-04     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9506216     Medline TA:  Appl Human Sci     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  191-7     Citation Subset:  IM    
Laboratory of Biomedical Engineering, Nagaoka University of Technology.
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MeSH Terms
Hot Temperature*
Pain / physiopathology*
Pain Measurement / methods
Pain Threshold*
Physical Stimulation*
Skin / physiopathology

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