Trocar and its cannula assembly

Abstract

The invention discloses a cannula assembly for a puncturing device. The cannula assembly includes a housing configured for a working channel through which an instrument passes, the working channel having an aperture defined as a working aperture; an air inlet, a seal assembly, and a cleaning assembly disposed at a distal end of the seal assembly, the cleaning assembly including an absorber and a scraper. The aperture of the central aperture of the absorbent member is defined as a first aperture. The diameter of the central hole of the scraping member is defined as a second diameter; wherein the first aperture is smaller than or equal to a second aperture, and the second aperture is smaller than or equal to the working aperture. The absorbent member also has a plurality of radially extending cracks or slits. When instrument is withdrawn from the abdominal cavity outward through the cannula assembly, the scraping member first scrapes the attached liquid on the instrument, and the absorbing member reabsorbs the scraped liquid, thereby effectively preventing the fluid from depositing on the cannula assembly with the detection device, and lowering the cannula assembly or the puncturingdevice that is re-contaminated by the re-insertion of the detection device into the cannula assembly.

Description

technical field [0001] The invention relates to a surgical instrument, in particular to a trocar and a sleeve assembly thereof, belonging to the field of medical instruments. Background technique [0002] The use of laparoscopy in surgery has been widely accepted and offers many advantages over conventional open surgery, including less trauma, faster healing, and a reduced risk of infection. A trocar is a surgical instrument used in laparoscopic surgery to establish an artificial channel into a body cavity, and usually consists of a sleeve assembly and a puncture core assembly. Its general clinical use method is: first cut a small opening on the patient's skin, then pass the puncture core assembly through the cannula assembly, and then drive the cannula assembly to penetrate the abdominal wall through the skin opening and enter the body cavity. Once in the body cavity, the puncture core assembly can be removed, leaving the cannula assembly as a passage for the instrument to...

AI Technical Summary

Problems solved by technology

When the detection device that has been cleaned outside the body passes through the cannula assembly again, the fluid deposited in the cannula assembly will adhere to the detection device again, re-contaminate the detection device, and affect the visibility of the detection device again

As a result, probes require multiple removals from the body for extracorporeal cleaning during a single procedure, which is a time-consuming process that increases complications and surgical procedures due to repeated insertion and removal of probes. Possibility of contamination

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