Objective
We sought to compare current practices in patient selection and 30-day outcomes for transperitoneal and retroperitoneal AAA repairs.
Methods
All patients undergoing elective transperitoneal or retroperitoneal surgical repair for AAA between January 2011 and December 2013 were identified in the Targeted Vascular NSQIP database. Emergent cases were excluded. Baseline characteristics, anatomical detail, intra-operative and post-operative outcomes were evaluated among those with infrarenal or juxtarenal AAA only.
Results
1,135 patients were identified; 788 transperitoneal (69%), 347 retroperitoneal (31%). Evaluating infrarenal and juxtarenal aneurysms only, the retroperitoneal patients were less likely to have an infrarenal clamp location (43% vs. 68%), had more renal revascularizations (15% vs. 6%, p<.001), more visceral revascularizations (5.6% vs. 2.4%, p=0.014) and more lower extremity revascularizations (11% vs. 7%, p=0.021) compared to the transperitoneal approach. Post-operatively there were no differences in mortality, or return to OR. Transperitoneal patients had a higher rate of wound dehiscence (2.4% vs. 0.4%, p=0.045), while retroperitoneal patients had higher incidence of pneumonia (9% vs 5%, p=0.034), transfusions (77% vs. 71%, p=0.037), reintubations (11% vs. 7%, p=0.034) and a longer LOS (median 8 vs. 7 days, p=0.048). After exclusion of all concomitant procedures, only transfusions remained more common in the retroperitoneal approach (78% vs. 70%, p=0.036). Multivariable analyses showed only higher rates of reintubation in the retroperitoneal group (OR1.7, 95% CI 1.0-3.0, p=0.047).
Conclusions
The retroperitoneal approach is more commonly used for more proximal aneurysms and was associated with higher rates of pneumonia, reintubations, transfusions and a greater length of stay on univariate analyses. However, multivariable analysis demonstrated similar results between groups. The long-term benefits and frequency of reinterventions remain to be proven.