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Anesthesia

Increased Arterial Blood Flow Detected After Sympathectomy in Lower Extremities Under Spinal Anesthesia

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— 1 min read

Research conducted at Marmara University Hospital in Istanbul, Turkey, has revealed that sympathectomy in the lower extremities after spinal anesthesia increases arterial blood flow. Pulsed-wave Doppler (PWD) of ultrasonography (USG) detected this increased blood flow. The study aimed to investigate PWD measurements of the posterior tibial artery (PTA) in patients undergoing spinal anesthesia. The results show that systolic and diastolic flow velocities in the PTA increase after spinal block.

Key Takeaways:

  • The study involved 30 patients aged 18-65 years who underwent elective surgery under spinal anesthesia.
  • The patients were measured before and after spinal anesthesia using PWD and USG modalities.
  • The results showed significant increases in vessel diameter, peak systolic velocity (PSV), end-diastolic velocity (EDV), mean velocity (Vmn), and volume time integral (VTI) after spinal anesthesia.
  • Conversely, pulsatility index (PI), resistive index (RI), and S/D (PSV/EDV ratio) values decreased significantly after spinal anesthesia.
  • The study suggests that PWD with USG may serve as a supplementary tool for assessing block success in patients with communication limitations.
  • This technique may be particularly useful when spinal anesthesia is preferred over general anesthesia.

Statistics:

  • 30 patients participated in the study, with a mean age of 52 years (22-65 years).
  • Significant increases in vessel diameter, PSV, EDV, Vmn, and VTI were observed after spinal anesthesia (p < 0.05).
  • Significant decreases in PI, RI, and S/D values were observed after spinal anesthesia (p < 0.05).
  • The study concluded that the technique has potential as a supplementary tool, particularly in patients with communication limitations.

Sources:

  • NewsRx. Researchers from Marmara University Hospital Detail Findings in Science (Spinal Anesthesia and Regional Hemodynamic Parameters). Science Letter. October 24, 2025; p 2176.
  • Spinal Anesthesia and Regional Hemodynamic Parameters. Journal of Ultrasound in Medicine, 2025.
  • Journal of Ultrasound in Medicine. Wiley, 111 River St, Hoboken 07030-5774, NJ, USA.
  • Marmara University Hospital, Department of Anesthesiology and Reanimation.

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