The firing and stopping device is a key part of endoscopic stapler to ensure surgical accuracy and safety.
The material is usually selected for high-strength, wear-resistant medical grade metal or high-performance engineering plastics. Medical metal such as stainless steel, with excellent mechanical properties, can withstand the high intensity impact during the firing process, not easy to deformation, to ensure the accuracy and stability of the stop; Engineering plastics have the advantages of light weight and good molding accuracy, while meeting the functional requirements, reducing the overall weight of the instrument and facilitating the operation of the doctor.
Its structural design is exquisite and rigorous. The appearance is mostly small block or sheet, closely fitting the firing track or related transmission parts of the stapler. The interior is equipped with an accurate clip, groove or stop structure, which is customized according to the firing mechanism and stroke requirements of the stapler. When the firing of the stapler reaches the predetermined position, the stop device can play a role quickly and accurately, prevent the further action of the firing mechanism, effectively prevent the over-firing and misfiring of the anastomotic nail, and ensure that the anastomotic nail is accurately embedded in the tissue. Avoid unnecessary damage to the tissue and guarantee the surgical effect.
From the point of view of functional characteristics, it plays a crucial role in limiting and correcting errors. On the one hand, precisely define the firing end point of the stapler, ensure that each firing action is completed within the preset range, so that the anastomotic nail molding and tissue suture meet the surgical expectations; On the other hand, if there is an abnormality during the operation, such as power transmission failure leading to the firing out of control, the firing stop, as the last line of defense, can forcibly terminate the firing, avoid disastrous consequences, and escort the smooth progress of endoscopic minimally invasive surgery.
