Clin Endosc.  2016 Jul;49(4):350-354. 10.5946/ce.2016.059.

Endoscopic Instruments and Electrosurgical Unit for Colonoscopic Polypectomy

Affiliations
  • 1Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea. ppakongs@daum.net

Abstract

Colorectal polypectomy is an effective method for prevention of colorectal cancer. Many endoscopic instruments have been used for colorectal polypectomy, such as snares, forceps, endoscopic clips, a Coagrasper, retrieval net, injector, and electrosurgery generator unit (ESU). Understanding the characteristics of endoscopic instruments and their proper use according to morphology and size of the colorectal polyp will enable endoscopists to perform effective polypectomy. I reviewed the characteristics of endoscopic instruments for colorectal polypectomy and their appropriate use, as well as the basic principles and settings of the ESU.

Keyword

Colonoscopic polypectomy; Snare; Surgical instruments; Instrumentation; Electrosurgical generation unit

MeSH Terms

Colorectal Neoplasms
Electrosurgery
Methods
Polyps
SNARE Proteins
Surgical Instruments
SNARE Proteins

Figure

  • Fig. 1. The forceps size (the distance between cups) ranges from 5 to 8 mm (left). The diameter of the cup is about 3 mm (right).

  • Fig. 2. Forceps polypectomy: colorectal polyp ≤3 mm can be removed by one-bite forceps (left), but 4 to 5 mm polyps need two bites for complete resection.

  • Fig. 3. Various shaped snares (upper) and various sizes (lower).

  • Fig. 4. Specific types of snare. (A) Oval snare with spikes. (B) Spiral oval snare. (C) Snareinflator. (D) Rotatable snare.

  • Fig. 5. Variables in endocut mode: coagulation power, cut duration, and interval between previous and next cut.


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