Patent ID: 8926487
Filing Date: 2015-01-06
Classification: A61B,A61M

Abstract:
1. A method of separating free oil from fat, which comprises; (a) preparating a syringe piston without a shaft, used in fat transplantation, disposed in a syringe-shaped cylindrical vessel, comprising: a piston body without the shaft; a first packing coupled with an outer surface of the piston body to form a seal between the piston body and the syringe-shaped cylindrical vessel; a filter groove formed in a front end of the piston body; a number of free oil discharging holes penetrating the piston body so as to provide a path between the filter groove at the front end of the piston body and a rear side of the piston body that is opposite the front side; an opening and closing device for opening and closing the free oil discharging holes, the opening and closing device comprising a screw hole formed in a central portion of the piston body adjacent to the free oil discharging holes, and a closing screw fastened into the screw hole so that the free oil discharging holes can be opened and closed; a second packing interposed between a head of the closing screw and the free oil discharging holes; a filtering device installed in the filter groove and spaced apart from the free oil discharging holes and having a larger cross sectional area than the free oil discharging holes and having holes of the size for filtering fat and passing free oil; and a weight coupled to the syringe piston and pressing fat when a density gradient centrifugation is performed so that the separation of the free oil is enhanced; (b) closing the free oil discharging hole by closing the closing screw such that the second packing interposed between the head of the screw and the free oil discharging holes seals the free oil discharging holes at the rear side of the piston body; (c) sucking fat through a front end of the cylindrical vessel; (d) opening the free oil discharging hole by releasing the closing screw; (e) performing the density gradient centrifugation of fat during which the weight moves the syringe piston forward towards the front end of the cylindrical vessel to press the fat in order to separate a free oil from the fat.