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Related Experiment Videos

Increasing circulation in the lower limb under general anesthesia using the A-V impulse system.

Hiroaki Urayama1, Kenichi Tanaka, Daisuke Fukui

  • 1Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan. urayama@hsp.md.shinshu-u.ac.jp

Angiology
|December 12, 2003
PubMed
Summary

Foot impulse technology (FIT) significantly enhances lower extremity venous blood flow during general anesthesia. This finding supports its use in preventing deep vein thrombosis (DVT) in surgical patients.

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Area of Science:

  • Vascular Surgery
  • Anesthesiology
  • Medical Devices

Background:

  • Deep vein thrombosis (DVT) prophylaxis is crucial in surgical patients.
  • Foot impulse technology (FIT) is recognized for DVT risk reduction.
  • Intraoperative application of FIT for DVT prophylaxis requires further investigation.

Purpose of the Study:

  • To evaluate the efficacy of an A-V impulse system (a type of FIT device) in augmenting lower extremity venous flow.
  • To assess the impact of the A-V impulse system on venous velocity during general anesthesia.
  • To determine the statistical significance of changes in venous flow velocity with FIT use.

Main Methods:

  • Utilized duplex ultrasound scanning to measure common femoral vein blood velocity.
  • Included thirteen surgical patients without pre-existing lower limb vessel lesions.

Related Experiment Videos

  • Measured venous velocity with and without the A-V impulse system, before, during, and after general anesthesia.

    • Main Results:

    • Mean resting venous velocity showed a slight decrease from pre-anesthetic to postoperative states.
    • Peak venous velocities significantly increased with the A-V impulse system active during anesthesia (54.6 cm/sec) and postoperatively (52.7 cm/sec).
    • The increases in venous velocity during anesthesia and postoperatively were statistically significant (p<0.05).

    Conclusions:

    • The A-V impulse system effectively increases lower extremity venous velocity under general anesthesia.
    • Intraoperative use of FIT devices demonstrates potential for DVT prophylaxis.
    • This technology offers a promising non-invasive method to improve venous return in anesthetized patients.