Background: Various devices are available for endoscopic radial artery harvesting during coronary artery bypass grafting. Thermal spread and graft damage, however, are common concerns. The aim of this study was to compare the MiFusion TLS2 system (Endotrust, Nettetal Germany) with direct heat technique and the LigaSure Maryland system (Medtronic, Dublin, Ireland) using advanced bipolar technique in a prospective randomized study.
Methods: One hundred consecutive patients undergoing coronary artery bypass grafting with endoscopic radial artery harvesting were prospectively included and randomized 1:1. The proximal (brachial) ends of the grafts were analyzed using fluorescence microscopy with focus on graft integrity. In addition, harvesting time, graft sealing, residual bleeding, and incidence of neurological disorders were compared.
Results: Patient age was 67 ± 8 years. Mean harvesting time was 26.5 ± 9 minutes for the TLS2 and 23.2 ± 8 minutes for the LigaSure (P = .049). Overall graft integrity was good in both groups. A significantly better graft integrity was observed in the LigaSure group (scale 0 to 3; 3 = best) with 2.5 ± 0.6 for TLS2 and 2.8 ± 0.4 for LigaSure (P = .031). LigaSure provided significantly better graft sealing (scale 0 to 2; 0 = best) with 0.6 ± 0.7 vs 1.0 ± 0.6 (TLS2) (P = .006) and less residual bleeding (scale 1 to 5; 1 = best) with 1.4 ± 0.6 vs 2.0 ± 0.9 (TLS2) (P < .001). Transient sensibility disorders were less frequently observed with LigaSure (2% vs 16%, P = .015).
Conclusions: Endoscopic radial artery harvesting can be performed with excellent results and good graft integrity using both devices. Compared with the MiFusion TLS2, the LigaSure device led to faster procedural times and resulted in better graft integrity. Along with providing a better seal, LigaSure was associated with less sensibility disorders.
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