Surveillance after lower extremity arterial bypass

Area of Science:

• Vascular Surgery
• Graft Patency Surveillance

Background:

• Lower limb bypass grafting is crucial for limb salvage.
• Graft surveillance programs are essential for maintaining long-term patency.
• Evolving strategies aim to optimize post-operative monitoring.

Purpose of the Study:

• To outline current best practices for surveillance after lower limb bypass grafting.
• To identify key indicators for graft revision.
• To establish targets for graft failure rates.

Main Methods:

• Clinical assessment of limb ischemia symptoms.
• Ankle or toe systolic pressure measurements.
• Duplex ultrasound imaging of bypass grafts.

Main Results:

• Early postoperative duplex ultrasound predicts the need for graft revision.
• Moderate graft stenosis can be safely monitored serially.
• Critical stenosis (>70% diameter reduction) is defined by specific duplex criteria (PSV >300 cm/s, PSVR >3.5).

Conclusions:

• Individualized testing frequency is recommended based on patient, bypass type, and scan findings.
• Focusing on critical stenosis identification and repair is key.
• A successful graft surveillance program should achieve <3% annual graft failure.