Surgery medical stapling nail forming groove with nail bending channel

Abstract

The invention provides a surgery medical stapling nail forming groove with a nail bending channel. When the axis in the perpendicular direction of a tissue contact face of a nail anvil serves as the rotation axis of a rotary body and the rotary body enters the bottom of the groove and is tightly attached to a medical stapling nail guide line of the medical stapling nail forming groove and moves along the medical stapling nail guide line of the medical stapling nail forming groove, a track hook face formed by the rotary body in the groove is a hook face of the nail bending channel of the medical stapling nail forming groove. The surgery medical stapling nail forming groove with the nail bending channel is particularly suitable for the occasion that the medical stapling nail forming groove with the low machining technical requirement is firstly machined on the tissue contact face of the nail anvil, finish machining cutting allowance is reserved, then the rotary body serves as a cutting head of a cutting tool of precise high-speed rotary cutting machines such as an accurate engraving machine to machine the nail bending channel of the medical stapling nail forming groove, so that the machining cost is greatly reduced, and the machining time is greatly shortened.

Description

technical field [0001] The present invention relates to the staple forming grooves used in various surgical staplers, in particular to the staple forming grooves used in straight staplers or straight cutting staplers, and in particular to the staple forming grooves used in arc cutting staplers. Staple forming grooves, especially related to the staple forming grooves used in circular staplers, especially to the staple forming grooves used in laparoscopic surgical cutting staplers, and more particularly to various electric surgical staplers Staple forming slots used. Background technique [0002] Various surgical staplers are used to replace the manual anastomosis operation with needles and threads in surgery, and are being widely used in end-to-end, end-to-side and side-to-side anastomosis operations of organs and tissues such as human digestive tract organs, respiratory tract organs, and urogenital organs. The operation of forming a channel, closing the incision and clampin...

AI Technical Summary

Problems solved by technology

The unsatisfactory part of the staple forming grooves of these several styles of surgical staplers is that the shapes of the staple forming grooves are all complicated, and there are often 40 to 80 staple forming grooves arranged on the tissue contact surface of the same nail anvil. Staple forming grooves need to be processed by mold pressing and metal powder injection sintering

[0006] If the mold press forming method is used to process the staple forming groove, because the quantity of the staple forming groove is large, a press of about 80 tons is needed to be pressed and formed; The forming contact surfaces of individual staple forming grooves cannot be completely in contact at the same time, and the narrowest part of the forming contact surface of the staple forming groove is only about 0.3mm, so the pressure of about 80 tons of the press is concentrated on individual staple forming The forming contact surface of the groove first causes deformation or damage to the forming contact surface of the other staple forming groove, so that the shape and size accuracy of the staple forming groove processed subsequently cannot meet the technical requirements for accurate staple forming, and also The service life of the press-forming mold is very short; also because when the forming contact surfaces of 40 to 80 staple forming grooves on the press-forming mold are all pressed into the tissue contact surface of the nail anvil, complex plasticity of the nail anvil occurs. Deformation may cause the accuracy of the position and size of the processed staple forming groove and its surrounding parts to fail to meet the technical requirements for accurate staple forming; in addition, in order to meet the technical requirements for the surface roughness of the staple forming groove, in Before processing the forming groove of staples by mold pressing method, it is necessary to precisely polish the tissue contact surface of the anvil, which increases the processing cost and processing time

[0007] If the metal powder injection sintering method is used to process the staple forming groove, the shape, position, and dimensional accuracy and surface roughness of the staple forming groove processed by metal powder injection sintering cannot meet the technical requirements for accurate forming of staples. Therefore, it is necessary to carry out secondary processing on the staple forming groove

[0008] In addition, mold pressing molding and metal powder injection sintering molding are used for processing. For the staple forming grooves of each specification and type of surgical stapler, a set of special molds with high precision requirements must be equipped. More than 100 sets of molds can be completed, which makes the processing cost and maintenance cost quite high

[0009] If the metal cutting method is used to process the staple forming groove, because the shape of the existing staple forming groove is very complicated, it is composed of many curved surfaces, and there are many corners with small curvature radii at the junction of each curved surface, so each staple forming groove The processing needs to be completed several times with small cutting tools, and the small cutting tools are easily damaged, which makes the processing cost of 40 to 80 staple forming grooves very high and the processing time is quite long

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