Comparison Between Preincision Traction and On-Demand Traction in Assisting Colorectal Endoscopic Submucosal Dissection.

Introduction: Adequate exposure of the dissection site is very important for colorectal endoscopic submucosal dissection (ESD). We aimed to investigate the safety and efficacy of the preincision traction (PIT) method using an internal clip-with-spring device in comparison with the conventional on-demand traction (ODT) method in assisting colorectal ESD.

Methods: This was a prospective nested case-control study. A total of 26 patients for PIT-ESD and other 26 patients for ODT-ESD were involved. Data on clinical characteristics and therapeutic outcomes were collected and analyzed.

Results: The en bloc resection rate (both 100%) and curative resection rate (92.3% vs 96.2%) showed no significant difference between the 2 groups. Compared with ODT-ESD, PIT-ESD significantly reduced the procedure time (29.8 ± 18.4 vs 57.4 ± 33.7 minutes, P = 0.001) and submucosal injection volume (49.6 ± 32.3 vs 70.8 ± 37.6 mL, P = 0.034), decreased the rate of intraoperative bleeding (26.9% vs 57.7%, P = 0.025) and muscular injury (7.7% vs 34.6%, P = 0.038), and shortened the postoperative hospital stay (1.8 ± 0.8 vs 2.5 ± 1.2, P = 0.015).

Discussion: The PIT method could significantly improve the safety and efficacy of colorectal ESD.