The cannula is an important auxiliary component in the endoscopic stapler system, which plays a key role in ensuring the smooth operation.
In appearance, it is usually a slender tubular structure, the length varies according to different surgical needs, and is generally designed to fit the size of common endoscopic surgery channels, so as to facilitate smooth entry into the body through the abdominal wall or other body cavity puncture points. Its outer diameter is relatively slim to minimize the invasion of the patient's body cavity tissue and reduce trauma and postoperative pain. The smooth walls of the casing not only help the instrument to move in and out of it quickly and smoothly, but also reduce friction damage to the surrounding tissue and avoid unnecessary bleeding and tissue tearing risk. Some casing outer wall is also marked with a scale, so that doctors can intuitively understand the insertion depth during the operation, accurately control the surgical process, and ensure the accuracy of the operation.
In terms of material, medical grade high-performance polymer or metal materials are used. Medical grade silicone is one of the common materials, it has excellent biocompatibility, soft and elastic, will not cause irritation or allergic reaction to the body cavity tissue, can effectively protect fragile internal organs. At the same time, the silicone casing also has a certain degree of flexibility, which can be bent with the shape of the body cavity to a certain extent, adapt to different anatomical structures, and further reduce the pressure on the tissue. Part of the casing is made of stainless steel or titanium alloy. This kind of metal casing has high strength and good wear resistance, can withstand the friction of multiple surgical instruments, and is not easy to deform and damage. It is especially suitable for scenes with high surgical difficulty and frequent and complex operation to ensure the stability and reliability of the instrument channel during long-term surgery.
