A new serrated snare for improved tissue capture during endoscopic snare resection

Area of Science:

• Gastroenterology
• Endoscopic Surgery
• Medical Device Innovation

Background:

• Endoscopic snare resection is standard for gastrointestinal polyps and neoplasm.
• Large sessile polyps pose challenges, often requiring piecemeal resection.
• Improved techniques aim for single-specimen removal and better pathological evaluation.

Purpose of the Study:

• To evaluate a new serrated endoscopic snare against a conventional snare.
• To assess the efficacy of the serrated snare in resecting artificial polyps.
• To determine if the new snare improves tissue yield and reduces fragmentation.

Main Methods:

• An ex vivo porcine colon model was used with 70 artificial sessile tumors.
• Thirty-five tumors were resected using a new serrated snare.
• Thirty-five tumors were resected using a conventional snare without teeth.

Main Results:

• The serrated snare resected an average of 454 mg of tissue per polyp.
• The conventional snare resected an average of 347 mg of tissue per polyp.
• This represents a 31% increase in tissue removed with the serrated snare, minimizing tissue loss.

Conclusions:

• The new serrated snare significantly increases tissue resection efficiency in a single attempt.
• The design prevents accidental loss of entrapped tissue from the snare loop.
• This innovation may facilitate removal of flat polyps and reduce specimens in piecemeal resections for improved histopathology.