Asymptomatic popliteal aneurysm: elective operation versus conservative follow-up

Area of Science:

• Vascular Surgery
• Clinical Outcomes Research
• Aneurysm Management

Background:

• Popliteal artery aneurysms (PAAs) are the most common peripheral artery aneurysms.
• Asymptomatic PAAs often go undetected until complications arise.
• Risk stratification for asymptomatic PAAs is crucial for timely intervention.

Purpose of the Study:

• To identify predictors of complications in patients with asymptomatic popliteal artery aneurysms.
• To evaluate the natural history and complication rates of untreated asymptomatic PAAs.
• To inform surgical decision-making for asymptomatic PAAs.

Main Methods:

• Retrospective analysis of 42 patients with asymptomatic PAAs followed without surgery.
• Data collected included aneurysm size, ankle-brachial index (ABI), and prior abdominal aortic aneurysm (AAA) surgery.
• Mean follow-up duration of 6.2 years, with detailed recording of complications.

Main Results:

• 25 patients (59.5%) developed complications within a mean of 18 months.
• Complications included limb loss (3), claudication (8), fasciotomy (2), and peroneal nerve palsy (1).
• Absent ankle pulses and prior AAA surgery were significant risk factors for complications. Cumulative 5-year complication risk was 68%.

Conclusions:

• Asymptomatic popliteal artery aneurysms are a dangerous condition requiring careful consideration for elective surgery.
• Patients with absent ankle pulses or a history of AAA surgery are at particularly high risk.
• Risk stratification can aid in selecting patients who may benefit from prophylactic surgical intervention.