Contemporary Outcomes of Peripheral Bypass Compared with Amputation in Octogenarians

Chronic limb threatening ischemia in octogenarians presents unique treatment challenges in patients with multiple comorbidities and variable functional status. Endovascular interventions offer a better risk profile; however, this is not always a feasible option for anatomic or disease-specific reasons. This study compares outcomes of peripheral bypass versus amputation in octogenarians.

The American College of Surgeon's National Surgical Quality Improvement Program database was queried from 2013 to 2016 for patients >80 years undergoing femoral-popliteal bypass (FPB), femoral-tibial bypass, or popliteal-tibial bypass with vein or prosthetic graft versus above-knee amputation (AKA) or below-knee amputation. Patients presenting with systemic inflammatory response syndrome, sepsis, septic shock, or a leukocytosis >11,000 were excluded. Patient demographics, risk factors, and 30-day unadjusted outcomes were analyzed. Multivariate regression analysis was then performed to compare risk adjusted 30-day morbidity and mortality.

The bypass group contained 2226 patients compared with 1253 patients in the amputation group. AKA represented 59.9% of the amputation group. The largest portion of bypasses were FPBs at 58.6%. Total preoperative functional dependence was 1.3% for bypass versus 18.2% for amputation (P-value, <0.01). Risk factors for amputation over bypass included age, minority race, American Society of Anesthesiologists class IV-V, diabetes, congestive heart failure, dialysis, preoperative open wound, facility of origin, and functional dependence. Unadjusted 30-day mortality was 3.6% for bypasses and 7.7% for amputations (P-value, <0.01), with an in-hospital mortality of 2.0% vs. 3.2% and a mortality after discharge of 1.6% vs. 4.5%, respectively (P-value <0.01). Unadjusted morbidity was not significantly different between the 2 groups (18.7% bypass vs. 17.8% amputation, P-value, 0.52). After multivariate risk adjustment, there was no statistically significant difference in mortality or morbidity between the groups.

Contemporary risk-adjusted 30-day morbidity and mortality for bypass versus amputation in octogenarians show no significant difference. These data demonstrate that aggressive surgical limb salvage can be safe in well-selected patients in this age group.