Patent ID: 8029474
Filing Date: 2011-10-04
Classification: A61B

Abstract:
1. A trocar for laparoscopic surgery for performing the laparoscopic surgery through a surgical instrument by making a puncture in the abdomen of a patient, the trocar comprising: a head unit comprising an upper case having an installation hole in an upper part thereof and having a stopper groove in an inner circumferential surface of the installation hole, and a lower cover installed at the bottom of the upper case and having a stopper piece at a periphery of an upper surface of the lower cover; a base unit comprising a lower case having a trocar sleeve fixing protrusion in a lower part thereof and having an injection port fixing protrusion and a fixing groove at a periphery of the lower part, and a coupling member installed at an upper surface of the lower case and having a coupling hole at a periphery of an upper surface of the coupling member; a trocar sleeve installed at the trocar sleeve fixing protrusion of the lower part of the lower case; a lip valve installed within the head unit and having an upper part formed in a circular shape and having a tapered lower part; an insertion unit installed at the upper part of the lip valve; a button unit comprising an elastic bush fitted to both side surfaces of the lower case of the base unit, at least two buttons elastically installed at the elastic bush, and press shaft housed within the at least two buttons, wherein actuation of the at least two buttons moves the press shaft to open the tapered lower part of the lip valve selectively; and a trocar needle introduced into the trocar sleeve through the lip valve or the insertion unit to make a puncture in the abdomen of the patient.