From conventional minimally invasive to robotic-assisted Ivor Lewis esophagectomy – A Nordic single-center retrospective study

Abstract

Background

High-quality studies from Asia have demonstrated that robotic assisted minimally invasive esophagectomy (RAMIE) is a feasible and comparable alternative to conventional minimally invasive esophagectomy (MIE), evidence regarding its application to Western patients remains limited. This study evaluates the short-term outcomes during the initial phase of RAMIE implementation in comparison to the previous standard MIE technique in a Nordic center.

Methods

A retrospective single center study of prospectively registered data, comparing short-term outcomes between the final 100 patients operated with MIE and the first 100 patients operated with RAMIE. The primary outcome was the total number of lymph nodes harvested. Secondary outcomes included postoperative pneumonia, anastomotic leakage, serious complications (Clavien Dindo $\ge$ 3), length of operation, length of hospital stay and resection margin status. An inverse probability weighting model and regression analysis was conducted.

Results

200 patients were included (RAMIE n = 100, MIE n = 100). Matched groups (RAMIE n = 96, MIE n = 97) showed no difference in total number of lymph nodes harvested (RAMIE 22.1 vs. MIE 23.7, p = 0.50). RAMIE had higher postoperative pneumonia risk (OR = 2.3, p < 0.01), longer length of operation (+33.9 min, p < 0.01) and marginally increased risk of anastomotic leakage (OR = 2.4, p = 0.05). Comparing the last 50 patients operated with RAMIE to the MIE group, there was no difference in length of operation (OR = 10.3, p = 0.43).

Conclusion

The short-term oncological outcomes and safety remain secure even during the initial phases of RAMIE implementation in a Nordic cohort. The perioperative outcome for some measures after RAMIE were inferior to MIE, potentially related to learning curve aspects.