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Lower limb surveillance following autologous vein bypass should be life long
M J McCarthy1, D Olojugba, I M Loftus
1Department of Surgery, University of Leicester, UK.
Insights
Discontinuation of infrainguinal vein graft surveillance after one year is not recommended. Continued monitoring is essential for life to prevent graft-threatening arterial stenoses and ensure leg survival.
Area of Science:
- Vascular Surgery
- Clinical Outcomes Research
- Graft Surveillance
Background:
- Infrainguinal vein bypass grafts are crucial for limb salvage.
- Current surveillance protocols often extend beyond one year.
Purpose of the Study:
- To determine if infrainguinal vein graft surveillance can cease at one year.
- To assess the impact on graft survival and limb viability.
Main Methods:
- Prospective data collection from 351 infrainguinal vein bypass grafts (1988-1997).
- Analysis of graft stenosis and arterial inflow/run-off stenosis development over time.
Main Results:
- Vein graft stenoses predominantly occurred within the first year (91%).
- Post-one year, arterial stenoses posed a significant risk (9% per year).
- Overall risk of new stenosis after one year was 10% per year.
Conclusions:
- Vein graft stenosis risk significantly decreases after one year.
- Ongoing monitoring is necessary due to persistent risk of arterial stenoses.
- Lifelong surveillance is recommended for infrainguinal vein bypass grafts.
Background:
The aim of the study was to investigate whether infrainguinal vein graft surveillance can be stopped at 1 year without prejudicing graft or leg survival.
Methods:
Data were collected prospectively on 351 infrainguinal vein bypass grafts (326 patients) that had been entered into a vein graft surveillance programme between 1988 and 1997.
Results:
Some 104 grafts (30 per cent) developed significant new vein graft stenoses, 95 (91 per cent) of which occurred within 12 months. After 1 year, the risk of developing a significant graft stenosis was 3 per cent per year. Sixty-nine grafted limbs (20 per cent) developed new arterial inflow or run-off stenoses that required intervention, but only 37 (54 per cent) occurred within the first year, after which the risk was 9 per cent per year. The overall risk of developing a new vein graft or arterial stenosis after 1 year was 10 per cent per year.
Conclusion:
The incidence of vein graft stenosis decreases significantly 1 year after operation but there is still at risk of developing potentially graft-threatening arterial stenoses. Legs that have undergone infrainguinal vein bypass grafting should continue to be monitored in a surveillance programme for life.