The Olympus A2891 Needle Knife Electrode is device designed for precise endoscopic incisions, particularly sphincterotomy and precut papillotomy during ERCP procedures. Its insulated catheter with extended needle tip delivers controlled monopolar RF energy through therapeutic duodenoscopes, featuring triple-lumen design for simultaneous guidewire access, contrast injection, and cutting capability.

Key Features:

• Triple-lumen configuration supporting 0.035" guidewire, contrast injection, and monopolar cutting
  
• Extended needle tip (typically 4-5 mm) with radiopaque markers for fluoroscopic positioning
  
• Hydrophilic-coated catheter shaft (2.0-2.8 mm OD) for smooth navigation through 3.2-3.7 mm channels
  
• Pre-curved distal tip enhances stability during papillary incision
  
• Sterile disposable construction compatible with Olympus ESG-400/410 generators