Self-lubricating trocar

Abstract

Disclosed is a self-lubricating trocar. A self-lubricating function of a trocar can be realized by a way that a lubricating device capable of absorbing, storing and releasing medical lubricants is arranged in a position, close to an end sealing ring, between an end cap and the end sealing ring of a sheathing canal of the trocar. When a surgical instrument is inserted into the lubricating device which is squeezed by the same, the medical lubricants can be overflowed and released from the lubricating device to have the surgical instrument lubricated; when the medical instrument is withdrawn, the lubricating device is less squeezed by the medical instrument and restores to the original shape to absorb and store the medical lubricants. With the surgical instrument inserting into or withdrawing from the lubricating device, functions of the lubricating device in releasing, coating, or absorbing and storing the medical lubricants are realized. The trocar can be self-lubricated to enter the surgical instrument, sealing effect is good, and resistance to motion is low.

Description

technical field [0001] The invention relates to a surgical instrument, in particular to a trocar 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 performance, the structure is simplified , reduce cost, improve performance, this trend has become the direction of trocar improvement. [0003] In order to facilitate the operation, it is required that the puncture device can use both 5mm surgical instruments and 10mm or 12mm surgical instruments. Thus, the diameter of the instrument through hole of the end seal of the trocar is usually less than 4 mm. When a surgical instrument with a diameter of 12mm passes through the surgical instrument through hole of the 4mm end sealing ring, the sealing ring produces a large encircling force, and a large movement re...

AI Technical Summary

Problems solved by technology

Another way is to make the end sealing ring into the shutter structure of the camera, but because there is a gap between the moving flaps that constitute the shutter in this shutter structure, it cannot form a complete seal; To control the amount of leakage within a certain level, it is necessary to continuou

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