gastrointestinal endoscope forceps channel Commonly known as the biopsy channel.
It is a hollow, flexible, precision tube running through the entire length of the body of a endoscope.As a core supporting channel component for flexible endoscopes, it provides a safe, smooth and stable guarantee for the delivery of endoscopic instruments such as biopsy forceps and high-frequency electrosurgical knives, and is suitable for the diagnosis and treatment operations of various flexible endoscopes including gastroscopes , colonoscopes,and duodenoscopy.
1.Material Characteristics
Inner Layer: Wear-resistant and lubricious. The inner wall undergoes a special treatment process to ensure extreme smoothness and minimal friction, allowing for the smooth advancement and withdrawal of instruments—such as biopsy forceps and high-frequency electrosurgical knives—thereby protecting endoscopic equipment and enhancing operational fluidity.
Outer Layer: Made of a special polymer material that is flexible yet collapse-resistant and bend-tolerant. The lumen remains unobstructed without collapsing or kinking, even during repeated bending of the endoscope shaft. The overall design is thin and extra-long, capable of flexing freely with the endoscope to navigate the complex curves of the esophagus, stomach, and intestines.
2.Core Functions
Utilizing the instrument channel, examination, sampling, and minimally invasive treatment can be performed simultaneously in a single endoscopic pass.
Sampling/Diagnosis: Collecting lesional tissue with biopsy forceps, scraping mucosa with cytology brushes, performing injections with puncture needles, etc.
Treatment: Polypectomy, retrieval of gastric foreign bodies using forceps, etc.
3.Mainstream specifications
| Tube diameter (mm) | Typical Application Scenarios | Key Adaptation Advantages |
| 4.2 | Colonoscopy, therapeutic gastroscopy | Large lumen diameter for complex therapeutic instruments, high structural support ensures stable delivery. |
| 3.8 | General-purpose gastroscopes and colonoscopes | Balances passability and accommodation space, suitable for most routine diagnosis and treatment. |
| 3.2 | Diagnostic gastroscopy, pediatric endoscopy | High flexibility for precise operations, low friction reduces mucosal resistance. |
| 2.8 | Ultra-slim endoscopes, specialized diagnostic and therapeutic scenarios | Ultimate flexibility for high curvature, stable lumen without collapse. |
LYW offers a comprehensive range of customizable endoscope instrument channel tubes that cover mainstream clinical diameters, ensuring precise compatibility with various brands and models of endoscopic equipment as well as specialized diagnostic and therapeutic requirements. We also provide tailored solutions—including custom diameters, lengths, and material specifications—to meet the specific needs of individual clients.
