Trocar

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Trocar

 

a medical instrument for piercing the wall of the abdominal or thoracic cavity and extracting an exúdate or transudate. The trocar consists of a handle onto which tubes 1–3 mm in diameter are screwed. The sharp end of a mandrin that runs through the tube protrudes from it. The trocar is sterilized before use by boiling. After the skin is pierced under local anesthesia, the mandrin is withdrawn by means of the handle, and the fluid flows out through the tube. A drain may be inserted through this tube to permit a constant flow of fluid.

References in periodicals archive ?
(15) described direct trocar entry into the abdominal cavity and argued that the complications associated with a Veress needle do not occur at the entrance with direct trocars.
Catarci reported highest with optical trocars (0.27%), the second highest with the closed technique (0.18%, used 82% of the time), and the lowest with the open technique (0.09%) in an analysis of a multicentre questionnaire survey of general surgeons (57% responding).16 Bonjer et al.
Caption: The cosmetic results, 2 weeks postoperatively, of a hysterectomy performed with two 5-mm trocars placed inside the umbilicus and two minilaparoscopic percutaneous cannulas inserted at lower sites, are good.
The insertion of 4th trocar laterally in traditional method required for grasping and lifting gall bladder upward and towards right shoulder has been challenged by many authors worldwide7,8.
Trocars are introduced in a similar 15 to 20 degrees caudal direction.
Optical trocars have a transparent tip that allows the surgeon to visualize the abdominal-wall entry layer by layer using a 0[degrees] laparoscope, usually after pneumoperitoneum is created with a Veress needle.
Despite its superiority over open surgery, it is not completely risk free and many of its lethal complications are related to creation of pnuemoperitoneum for gaining access to intra-abdominal cavity.1,2 More than half of these complications are related to gaining access3 and majority of these are observed during insertion of primary umbilical trocar.4 Two basic methods commonly used worldwide are, the closed method involving blind insertion of veress needle and open method involving insertion of Hasson cannula under direct vision as advised by Hasson.
"We do still use the metal trocars where clinically necessary and safe to do so, however we will be moving towards a fully disposable stock as the metal trocars become no longer serviceable."
The audit, carried out by the Association of Laparoscopic Surgeons of Great Britain and Ireland (ALSGBI), found Spire Cardiff Hospital was one of almost 20% of hospitals audited to be using sharp metal trocars.
All three cases have involved infringement of the same United States Patent 5,385,553 entitled "Trocar with Floating Septum Seal." The USSC trocar line at issue is the VERSAPORT PLUS trocars.
Classic describes trocars as complex, sleeve-like tools that provide surgeons with a tunnel in which to insert instruments such as laparoscopes for certain minimally invasive surgical procedures.