Puncture rods and trocars

Abstract

In the puncture rod and the puncture device of the present invention, the switch pressing plate of the puncture rod is arranged on the side of the handle base. When puncturing, press the switch pressure plate, the knife head, the sheath and the slide bar slide towards the end of the handle seat under the resistance of the abdominal wall muscles, the spring of the slide bar is compressed, and the blade protrudes from the grooves on both sides of the knife head. When the puncture rod passes through the peritoneum, due to the sudden disappearance of the resistance on the knife head, under the thrust of the slide bar spring, the slide bar, the sheath and the knife head stretch out rapidly, and the blade is recovered to the sides of the knife head. In the groove, prevent the blade from damaging the abdominal organs. The switch pressure plate bounces up, and at the same time, under the elastic force of the switch push spring, the locking block of the slider and the locking convex step of the slider make a collision sound, indicating that the puncture rod has passed through the abdominal wall and can no longer puncture, which improves the safety of the trocar . In addition, because the connection seam between the cutter head and the sheath is non-perpendicular to the axis of the slide rod sleeve, the end sealing ring of the trocar will not be stuck in the above connection seam, which reduces the movement resistance of the puncture rod.

Description

technical field [0001] The invention relates to a laparoscopic surgical instrument, in particular to a puncture rod and a puncture device used in laparoscopic surgery. Background technique [0002] Laparoscopic surgery has been more and more widely used. In order to avoid iatrogenic infection, the amount of disposable trocar (Trocar) used in laparoscopic surgery is also increasing. On the basis of ensuring the use performance, reduce the operation time. The movement resistance of the device in the trocar can improve the safety performance of the product during puncture. This trend has become the direction of trocar improvement. [0003] In the prior art, the plane of the gap formed at the connection between the cutter head and the sheath of the puncture rod is usually perpendicular to the axial direction of the puncture rod. When the puncture rod passes through the end seal ring, the end seal ring is easily stuck in the above-mentioned gap Inside, increase the movement resi...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the plane of the gap formed at the connection between the cutter head and the sheath of the puncture rod is usually perpendicular to the axial direction of the puncture rod. When the puncture rod passes through the end seal ring, the end seal ring is easily stuck in the above-mentioned gap inside, increasing the movement resistance of the puncture rod

In addition, the locking switch of the puncture rod in the prior art is usually set at the front end of the handle seat of the puncture rod. When the puncture of the abdominal wall encounters the false cavity, or when there is a pause or withdrawal action during the puncture, the locking switch is easy to lock. The doctor can't find out in time, which will affect the operation

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