Abstract：
BACKGROUND: Spinal anaesthesia is widely used in obstetric anaesthesia practice but there is limited knowledge about the development of sympathetic blockade following spinal anaesthesia for caesarean birth. This study investigated the characteristics of sympathetic blockade by measuring peripheral skin temperature changes in the feet of patients given spinal anaesthesia for elective caesarean birth.
METHODS: A prospective observational study was conducted involving 60 eligible parturients scheduled for elective caesarean birth with spinal anaesthesia. Skin temperature probes were attached to the dorsum of both feet, and temperature measurements were recorded every minute. The dose of spinal anaesthesia given, and other relevant patient data, were collected.
RESULTS: All participants had successful spinal anaesthesia. Following spinal anaesthesia, a sustained rise in skin temperature of both feet was observed, indicating the presence of sympathetic blockade. The maximum rate of temperature increase occurred between 6 and 15 min after the intrathecal injection and plateaued from 22 min after the injection. Control participants did not show any changes in foot temperature.
CONCLUSIONS: This study demonstrates that successful spinal anaesthesia for caesarean birth results in a consistent and reliable rise in skin temperature of the feet that is evident after six minutes from intrathecal injection. The observed temperature changes provide indirect objective evidence of bilateral sympathetic blockade. Measurement of feet skin temperatures may serve as an additional objective indicator of successful spinal anaesthesia, along with tests of lower limb motor block and sensory block height. These findings contribute to the understanding of sympathetic blockade during spinal anaesthesia.
METHODS: A prospective observational study was conducted involving 60 eligible parturients scheduled for elective caesarean birth with spinal anaesthesia. Skin temperature probes were attached to the dorsum of both feet, and temperature measurements were recorded every minute. The dose of spinal anaesthesia given, and other relevant patient data, were collected.
RESULTS: All participants had successful spinal anaesthesia. Following spinal anaesthesia, a sustained rise in skin temperature of both feet was observed, indicating the presence of sympathetic blockade. The maximum rate of temperature increase occurred between 6 and 15 min after the intrathecal injection and plateaued from 22 min after the injection. Control participants did not show any changes in foot temperature.
CONCLUSIONS: This study demonstrates that successful spinal anaesthesia for caesarean birth results in a consistent and reliable rise in skin temperature of the feet that is evident after six minutes from intrathecal injection. The observed temperature changes provide indirect objective evidence of bilateral sympathetic blockade. Measurement of feet skin temperatures may serve as an additional objective indicator of successful spinal anaesthesia, along with tests of lower limb motor block and sensory block height. These findings contribute to the understanding of sympathetic blockade during spinal anaesthesia.
摘要：
背景：脊柱麻醉在产科麻醉实践中被广泛使用，但对剖宫产的脊柱麻醉后交感神经阻滞的发展了解有限。这项研究通过测量接受脊髓麻醉的选择性剖腹产患者脚部周围皮肤温度的变化，研究了交感神经阻滞的特征。
方法：进行了一项前瞻性观察性研究，纳入了60名符合条件的行择期剖腹产的产妇。皮肤温度探头连接到双脚的背部，每分钟记录温度测量值。给予脊髓麻醉的剂量，和其他相关患者数据，被收集。
结果：所有参与者都成功进行了脊髓麻醉。脊髓麻醉后,观察到双脚皮肤温度持续上升，表明存在同情封锁。最大温度升高速率发生在鞘内注射后6至15分钟之间，从注射后22分钟开始趋于平稳。对照组没有显示足部温度的任何变化。
结论：这项研究表明，成功的脊髓麻醉用于剖腹产可导致足部皮肤温度持续可靠地升高，这在鞘内注射6分钟后是明显的。观察到的温度变化提供了双侧交感神经阻滞的间接客观证据。脚部皮肤温度的测量可以作为脊髓麻醉成功的额外客观指标。以及下肢运动阻滞和感觉阻滞高度的测试。这些发现有助于理解脊髓麻醉过程中的交感神经阻滞。
方法：进行了一项前瞻性观察性研究，纳入了60名符合条件的行择期剖腹产的产妇。皮肤温度探头连接到双脚的背部，每分钟记录温度测量值。给予脊髓麻醉的剂量，和其他相关患者数据，被收集。
结果：所有参与者都成功进行了脊髓麻醉。脊髓麻醉后,观察到双脚皮肤温度持续上升，表明存在同情封锁。最大温度升高速率发生在鞘内注射后6至15分钟之间，从注射后22分钟开始趋于平稳。对照组没有显示足部温度的任何变化。
结论：这项研究表明，成功的脊髓麻醉用于剖腹产可导致足部皮肤温度持续可靠地升高，这在鞘内注射6分钟后是明显的。观察到的温度变化提供了双侧交感神经阻滞的间接客观证据。脚部皮肤温度的测量可以作为脊髓麻醉成功的额外客观指标。以及下肢运动阻滞和感觉阻滞高度的测试。这些发现有助于理解脊髓麻醉过程中的交感神经阻滞。
