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Related Experiment Videos

Duplex controlled angioplasty

G Ramaswami1, A al-Kutoubi, A N Nicolaides

  • 1Irvine Laboratory for Cardiovascular Investigation and Research, Academic Surgical Unit, St. Mary's Hospital, London, U.K.

European Journal of Vascular Surgery
|July 1, 1994
PubMed
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Duplex ultrasound imaging enabled successful angioplasty for peripheral artery lesions, reducing the need for X-ray exposure. This technique allows real-time monitoring of both artery anatomy and blood flow during the procedure.

Area of Science:

  • Vascular Surgery
  • Medical Imaging
  • Interventional Cardiology

Background:

  • Peripheral artery disease (PAD) often requires interventions like angioplasty.
  • Accurate lesion assessment and procedural guidance are crucial for successful angioplasty.
  • Minimizing radiation exposure during interventional procedures is a significant clinical goal.

Purpose of the Study:

  • To evaluate the feasibility and efficacy of using Duplex ultrasound for guiding angioplasty of peripheral arterial lesions.
  • To assess the ability of a novel catheter system with integrated Duplex transducer to monitor angioplasty in real-time.
  • To determine the extent to which Duplex control can replace or reduce the need for conventional angiography and fluoroscopy.

Main Methods:

  • Duplex ultrasound examination was used to identify and assess 38 peripheral arterial lesions (31 stenoses, 7 occlusions) in 16 patients with claudication.

Related Experiment Videos

  • A specialized catheter with an integrated piezoelectric transducer at the balloon's center was employed for angioplasty.
  • The Duplex system provided real-time visualization of the balloon's position, guide wire, and allowed for pre-, intra-, and post-procedural hemodynamic assessment.

    • Main Results:

    • Thirteen lesions (seven superficial femoral artery, three external iliac, two common iliac, one graft) were treated with Duplex-controlled angioplasty.
    • In 11 out of 13 lesions (85%), angioplasty was performed entirely under Duplex control, with only two cases requiring additional X-ray guidance.
    • Duplex ultrasound facilitated accurate balloon sizing and visualization of the guide wire, enabling direct ultrasound-guided puncture in one case.

    Conclusions:

    • Duplex ultrasound is a valuable tool for monitoring both anatomical and hemodynamic parameters during peripheral angioplasty.
    • The use of Duplex guidance can significantly reduce reliance on ionizing radiation (X-ray).
    • Initial experience suggests that angioplasty can be effectively performed in the majority of suitable lesions using Duplex control alone.