Xu Shulian, Sun Changhua (Institute of Psychology, Academia Sinica)
Yu Qiusheng, Liu Jialiang, Xiao Lianzhu, Wu Yulan (Beijing Institute of Tuberculosis)
The purpose of the study is to explore the role of preoperative explanation in the effect of acupuncture anaesthesia. 48 normal subjects were divided into readiness and non-readiness groups according to preexperimental instructions and the presence or absense of advanced information of the stimulation. The two groups were matched in sex, age, as well as their sensitivity as estimated by the combined results of the following three tests: 1) compound cutaneous sensitivity; 2) combined responses of pulse amplitude, respiration and galvanic skin reflex (G.S.R.) during acupuncture; 3) pain tolerance to spring pricking. Each test was found to be highly correlated with the effects of acupuncture anesthesia. There were 10 sensitives and 14 non-sensitives in each group. The acupuncture point chosen was Sanyangluo. After an induction period of 15' stimuli were given in the following sequence: spring pricking, heat, sand bag, ice box, press pain and electric pain. We recorded in detail the pain experienced by the subjects as well as their overt behavior, and evaluated their levels of pain sensation. Changes in pulse amplitude, respiration and G.S.R. evoked by the stimuli were also recorded simultaneously. The results were as follows:
1. Pain feeling of the subjects to stimuli in the nonreadiness-group was significantly stronger than the other group, but the difference was statistically significant between the sensitives, while the difference between the nonsensitives of the two groups was not significant.
2. G.S.R. responses to stimuli of the non-readiness group were greater than those of the other group, especially in the sensitives. The evoked responses of pulse amplitude and the compounded pulse, respiration and G.S.R. responses were different between the two groups only in the sensitives, it showed that the sensitives in the non-readiness group responded more strongly than those in the other group.
3. Both the pain feelings and the compounded evoked physiological responses of the sensitives were significantly higher than those of the non-sensitives in both groups. This suggests that as a factor which influences the effect of acupuncture analgesia, the psychological factor of mental readiness was less important than the sensitivity evaluated by the three tests as described above.
4. The results showed that comprehension or mental readiness of acupuncture analgesia, i.e. the time, quality, feeling of the stimuli, played only a moderate role in acupuncture analgesia. It seemed that prior-explanation of acupuncture had some significance, but its effect was limited and varied with subjects.
Yu Qiusheng, Liu Jialiang, Xiao Lianzhu, Wu Yulan (Beijing Institute of Tuberculosis)
The purpose of the study is to explore the role of preoperative explanation in the effect of acupuncture anaesthesia. 48 normal subjects were divided into readiness and non-readiness groups according to preexperimental instructions and the presence or absense of advanced information of the stimulation. The two groups were matched in sex, age, as well as their sensitivity as estimated by the combined results of the following three tests: 1) compound cutaneous sensitivity; 2) combined responses of pulse amplitude, respiration and galvanic skin reflex (G.S.R.) during acupuncture; 3) pain tolerance to spring pricking. Each test was found to be highly correlated with the effects of acupuncture anesthesia. There were 10 sensitives and 14 non-sensitives in each group. The acupuncture point chosen was Sanyangluo. After an induction period of 15' stimuli were given in the following sequence: spring pricking, heat, sand bag, ice box, press pain and electric pain. We recorded in detail the pain experienced by the subjects as well as their overt behavior, and evaluated their levels of pain sensation. Changes in pulse amplitude, respiration and G.S.R. evoked by the stimuli were also recorded simultaneously. The results were as follows:
1. Pain feeling of the subjects to stimuli in the nonreadiness-group was significantly stronger than the other group, but the difference was statistically significant between the sensitives, while the difference between the nonsensitives of the two groups was not significant.
2. G.S.R. responses to stimuli of the non-readiness group were greater than those of the other group, especially in the sensitives. The evoked responses of pulse amplitude and the compounded pulse, respiration and G.S.R. responses were different between the two groups only in the sensitives, it showed that the sensitives in the non-readiness group responded more strongly than those in the other group.
3. Both the pain feelings and the compounded evoked physiological responses of the sensitives were significantly higher than those of the non-sensitives in both groups. This suggests that as a factor which influences the effect of acupuncture analgesia, the psychological factor of mental readiness was less important than the sensitivity evaluated by the three tests as described above.
4. The results showed that comprehension or mental readiness of acupuncture analgesia, i.e. the time, quality, feeling of the stimuli, played only a moderate role in acupuncture analgesia. It seemed that prior-explanation of acupuncture had some significance, but its effect was limited and varied with subjects.
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