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Related Experiment Video

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Breathing-controlled Electrical Stimulation BreEStim for Management of Neuropathic Pain and Spasticity
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Miniature electrical stimulator for hemorrhage control.

Mark R Brinton, Yossi Mandel, Roopa Dalal

    IEEE Transactions on Bio-Medical Engineering
    |May 22, 2014
    PubMed
    Summary

    A new miniature electrical stimulator effectively reduces blood loss by inducing temporary vascular constriction. This device offers a portable solution for controlling hemorrhage in trauma patients, with no observed tissue damage.

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    Area of Science:

    • Biomedical Engineering
    • Trauma Care
    • Vascular Surgery

    Background:

    • Noncompressible hemorrhage is a leading cause of preventable death in trauma cases.
    • Current methods like tourniquets and dressings are often insufficient and can cause collateral damage.

    Purpose of the Study:

    • To develop and evaluate a portable electrical stimulator for inducing temporary vascular constriction to control hemorrhage.
    • To assess the efficacy and safety of this device in reducing blood loss.

    Main Methods:

    • Investigated vasoconstriction in rat femoral arteries and veins using electrical stimulation with varying pulse durations and repetition rates.
    • Optimized parameters (20 V, 1 ms pulse duration, 10 Hz repetition rate) for effective constriction.
    • Evaluated blood loss reduction after femoral artery resection and assessed vessel integrity via histology.

    Main Results:

    • Achieved rapid vessel constriction to 31 ± 2% of initial diameter, maintained for two hours.
    • Vessels dilated to 88 ± 3% of initial diameter within one minute post-treatment.
    • Reduced blood loss by 68 ± 11% in a femoral artery resection model.
    • Histology showed no vessel or endothelial damage seven days post-stimulation.

    Conclusions:

    • A miniature electrical stimulator can effectively induce temporary, reversible vasoconstriction to control noncompressible hemorrhage.
    • The device is safe, portable, and has low power consumption, making it suitable for field use in trauma management.