Mineo R, Sharrock N E
Department of Anesthesiology, Hospital For Special Surgery, Cornell University Medical College, New York, New York 10021.
Reg Anesth. 1993 Mar-Apr;18(2):106-9.
To determine whether lumbar epidural anesthesia affects pulse oximeter signals in the upper or lower extremity, 13 ASA I patients were studied.
Temperature and pulse oximeter probes were placed on the finger and the toe.
After epidural injection, the amplitude of the pulse oximeter waveform on the toe increased eight-fold but declined by 50% in the finger. The increase in amplitude of the pulse oximeter waveform in the foot preceded the temperature rise.
More reliable pulse oximeter signals may be obtained from the toe than the finger during lumbar epidural anesthesia. Furthermore, the increase in the pulse amplitude from the toe may aid in the early detection of successful epidural block.
为了确定腰段硬膜外麻醉是否会影响上肢或下肢的脉搏血氧饱和度信号，对13例美国麻醉医师协会（ASA）I级患者进行了研究。
将温度探头和脉搏血氧饱和度探头分别置于手指和脚趾上。
硬膜外注射后，脚趾上脉搏血氧饱和度波形的幅度增加了8倍，但手指上的幅度下降了50%。足部脉搏血氧饱和度波形幅度的增加先于体温升高。
在腰段硬膜外麻醉期间，从脚趾获得的脉搏血氧饱和度信号可能比从手指获得的更可靠。此外，脚趾脉搏幅度的增加可能有助于早期检测硬膜外阻滞是否成功。
