Williams C B, de Peyer R C
Endoscopy. 1979 Feb;11(1):47-50. doi: 10.1055/s-0028-1098324.
Conventional colonoscopic snare polypectomy for large polyps with stalk diameter of 1.5 cm or more carries a significant risk of haemorrhage after transection, probably due to "leak currents". The use of a return-electrode applied to the base of the polyp after snaring instead of the conventional patient-plate permits bi-polar polypectomy which is both safer and more efficient.
对于蒂直径达1.5厘米或更大的大型息肉，传统的结肠镜圈套息肉切除术在切除后有显著的出血风险，这可能是由于“漏电”所致。在圈套息肉后，将回路电极应用于息肉基部而非传统的患者极板，可进行双极息肉切除术，这种方法既更安全又更有效。
