Experiments were undertaken on normal subjects at the age of 19-44 years. Pain threshold were measured by Analgesymeter (Made in Ugobasile-Italy) in 60 subjects before and after 30 minutes of PC6 EA. Amplitude and latency of Hoffman wave of 30 males was investigated before and after 30 minutes of PC6 EA. EA parameters were set in 2Hz, 4-5 volts. The following results were shown: (1) PC6 EA could elevate pain threshold in most subjects (p< 0.01); After acupuncture, pain threshold is more increase in women comparing to men (p<0.05). Electric acupunture at Neiguan inhibit H reflex by reduce its amplitude and last the latency of this wave (p<0.05). thse results suggested that pain reduce mechanism of electric accupunture could ralate to the role of nervous system.
Pain Threshold, Electroacupuncture

The purpose of this study was to investigate the effect of electroacuuncture stimulation therapy in the pain threshold of the subjects. 20 patients were randomly assigned to two experimental groups. Measurement of perception and pawn threshold of post-operative patients were taken during 7 days. They were written into preformed formula by themselves. Experiments were peformed with non-acupuncture stimulated group(10 patients) and with acupuncture stimulated group(10 patients). Acupuncture stimulation is applied with 2Hz, 30minutes, 12mA, biphasic wave, combined mix, and bilaterally to meridian points(LI4, CV24, S5 etc). The following results are obtained ; 1. The visual analogue scale of pain threshold was decreased with a time both control and experimental group. 2. The statistical significance was observed between control group and experimental group at 5, 6, 7 days(P<0.05). 3. The Pearson correlation coefficency of experimental group was higher than control group (P<0.05).
Acupuncture ; Electroacupuncture* ; Humans ; Pain Threshold

In Malaysia, it is a common belief among health care workers that females and Indians have lower pain threshold. This experience, although based on anecdotal experience in the healthcare setting, does not allow differentiation between pain tolerance, and pain expression. To determine whether there is a difference in the tolerance to pain between the three main ethnic groups, namely the Malays, Chinese and Indians as well as between males and females. This was a prospective study, using a laboratory pain model (ischaemic pain tolerance) to determine the pain tolerance of 152 IMU medical students. The mean age of the students was 21.8 years (range 18-29 years). All of them were unmarried. The median of ischaemic pain tolerance for Malays, Chinese and Indians were 639s, 695s and 613s respectively (p = 0.779). However, statistically significant difference in ischaemic pain tolerance for males and females Indian students were observed. Possible ethnic difference in pain tolerance in casual observation is not verified by this laboratory pain model. Difference in pain tolerance between genders is shown only for Indians.
Pain Threshold ; Pain ; Indian race ; seconds ; Models

No abstract available.
Adolescent* ; Humans ; Pain Threshold* ; Self-Injurious Behavior*

No abstract available.
Adolescent* ; Humans ; Pain Threshold* ; Self-Injurious Behavior*

OBJECTIVE: The purpose of this study is to evaluate the effects of the cold air application on the subjective pain threshold of knee joint pain. METHOD: We recorded the changes of the pain threshold in 60 patients before and after cold air application who complaint of knee joint pain. Patients were divided into 3 groups randomly with each 20 patients and each group received cold air application for 30 seconds, 1 minute, 3 minutes. Cold air of CRAis (Kyung-won Century, Korea) was applied to the anterior portion of the knee with a temperature of 30oC. The changes of the pain threshold was estimated by visual analogue scale. RESULTS: In 30 seconds treating group, VAS score was lowered 2.25+/-1.16 and 2.26+/-1.13 immediately after, and 30 minutes after cold air application, respectively (P<0.05). In 1 minutes treating group, VAS score was lowered 1.65+/-2.58 and 2.41+/-2.59 immediately after and 30 minutes after cold air application, respectively (P<0.05). In 3 minutes treating group, VAS score was lowered 1.94+/-1.80 and 2.10+/-2.3 immediately after and 30 minutes after cold air application, respectively (P<0.05). The VAS score was lowered significantly after cold air application in all groups, but there's no significant correlation between change of VAS score and cold air application time. In group with initial VAS score greater than 5, the VAS score was more decreased after cold air application. CONCLUSION: Cold air application for 30 seconds using CRAis machine is useful treatment method for knee joint pain.
Freezing* ; Humans ; Knee Joint* ; Knee* ; Pain Threshold

No abstract available.
beta-Endorphin* ; Exercise* ; Pain Threshold* ; Plasma*

Pain is difficult to investigate and difficult to treat, in part, because of problems in quantification and assessment. The use of opioids, combined with classic anesthetics to maintain hemodynamic stability by controlling responses to intraoperative painful events has gained significant popularity in the anesthetic field. However, several side effects profiles concerning perioperative use of opioid have been published. Over the past two decades, many concerns have arisen with respect to opioid-induced hyperalgesia (OIH), which is the paradoxical effect wherein opioid usage may decrease pain thresholds and increase atypical pain unrelated to the original, preexisting pain. This brief review focuses on the evidence, mechanisms, and modulatory and pharmacologic management of OIH in order to elaborate on the clinical implication of OIH.
Analgesics, Opioid ; Anesthetics ; Hemodynamics ; Hyperalgesia* ; Pain Threshold ; Pain, Postoperative

Face ; physiopathology ; Humans ; Mouth ; physiopathology ; Pain ; Pain Threshold ; Somatoform Disorders

BACKGROUND: Variability in pain sensitivity is a well known phenomenon. The variability also extends to experimental stimuli and postoperative opioid requirement. But the report of the relationship between pain threshold and postoperative opioid requirement is very rare. METHODS: We investigated prospectively the association between pressure pain threshold and postoperative morphine requirement. We estimated pressure pain threshold by using pressure algometer and adopted PCA to treat postoperative pain. RESULTS: In this study the relationship between pain threshold and postoperative opioid requirement was significant. But the correlation was weak negative (Pearson r = -0.273, P < 0.05). CONCLUSIONS: Considering other associated factors which affect postoperative pain, although correlation between pain threshold and postoperative opioid requirement was significant but we concluded that clinical relevance of pain threshold is uncertain.
Morphine* ; Pain Threshold* ; Pain, Postoperative ; Passive Cutaneous Anaphylaxis ; Prospective Studies