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Related Experiment Videos

Age-related decrease in toe-thumb temperature difference with lumbar epidural anaesthesia

S Sato1, N Okubo, S Yamashita

  • 1Department of Anesthesiology, University of Tsukuba, Ibaraki-ken, Japan.

Canadian Journal of Anaesthesia = Journal Canadien D'Anesthesie
|July 1, 1994
PubMed
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Lumbar epidural anesthesia causes big toe warming and thumb cooling. This study found that aging reduces the thumb

Area of Science:

  • Anesthesiology
  • Physiology
  • Geriatrics

Background:

  • Lumbar epidural anesthesia is known to cause peripheral vasodilation, leading to increased skin temperature in the extremities.
  • A compensatory decrease in temperature in other extremities, such as the thumb, has been observed.
  • The influence of patient age on these thermoregulatory responses to epidural anesthesia is not well understood.

Purpose of the Study:

  • To investigate the effect of age on the temperature difference between the thumb and big toe following lumbar epidural anesthesia.
  • To determine if age modifies the compensatory thermoregulatory response observed after epidural anesthesia.

Main Methods:

  • Fifty-four patients undergoing lumbar epidural anesthesia (L2/3 with 1.5% lidocaine) were enrolled.

Related Experiment Videos

  • Skin temperature probes were attached to the digital pads of the right big toe and right thumb.
  • Continuous temperature measurements were recorded every minute for 15 minutes post-injection.

    • Main Results:

    • Fifteen minutes after anesthesia, big toe temperature increased by 6.3°C, while thumb temperature decreased by 1.5°C.
    • A significant negative correlation was found between age and the toe-thumb temperature difference (r = 0.35, P < 0.01).
    • Age significantly influenced the ratio of thumb temperature decrease to big toe temperature increase (r = 0.41, P < 0.01).

    Conclusions:

    • The decrease in thumb skin temperature following lumbar epidural anesthesia is attenuated in older individuals.
    • Age is a significant factor influencing thermoregulatory responses during epidural anesthesia.
    • These findings have implications for monitoring peripheral circulation and temperature regulation in elderly patients receiving epidural anesthesia.