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Related Experiment Videos

Economising vein-graft surveillance programs

M M Idu1, J Buth, P Cuypers

  • 1Department of Surgery, Catharina Hospital Eindhoven, The Netherlands.

European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery
|June 20, 1998
PubMed
Summary

All patients require vein graft surveillance, as normal initial duplex scans do not predict future stenosis. Surveillance can be limited to six months post-operation for asymptomatic patients, as few stenoses develop later.

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Area of Science:

  • Vascular Surgery
  • Medical Imaging
  • Graft Surveillance

Background:

  • Vein graft surveillance is crucial for detecting stenosis and maintaining graft patency.
  • Current surveillance strategies vary, necessitating an evaluation of alternative approaches.
  • Identifying high-risk patients early can optimize resource allocation in surveillance programs.

Purpose of the Study:

  • To assess the effectiveness of two distinct vein graft surveillance strategies.
  • To determine if risk stratification based on initial duplex findings can refine surveillance.
  • To evaluate the impact of reducing the frequency of duplex examinations per patient.

Main Methods:

  • A prospective study involving 300 patients with femoropopliteal or distal bypass grafts.

Related Experiment Videos

  • Duplex ultrasound surveillance was performed during the first year post-operation.
  • Graft stenosis was assessed using the peak systolic velocity (PSV) ratio, with arteriography for confirmation; graft revision was based on ≥70% diameter reduction.

    • Main Results:

    • Initial mild-to-moderate stenosis (PSV ratios of 1.5-2.0 and 2.0-2.5) did not predict high event rates, showing similar 12-month patency to normal grafts (<1.5 ratio).
    • The incidence of new stenoses causing events was 8% at 3 and 6 months post-operation.
    • For patients with normal grafts in the first six months, the incidence of new stenoses dropped significantly to 2% at 9 months and 1% at 12 months.

    Conclusions:

    • Routine surveillance for all patients is recommended, as normal initial duplex scans do not preclude later graft stenosis.
    • Surveillance duration may be limited to the first six months post-operation for patients with normal findings during this period.
    • This targeted approach can effectively identify most significant graft stenoses while potentially reducing unnecessary follow-up examinations.