Patent ID: 6595978
Filing Date: 2003-07-22
Classification: A61M

Abstract:
A method of carrying out a suction operation with a syringe comprising:inserting a cartridge into a syringe body; wherein the syringe body comprises: a first end; a second end opposite to said first end; and a needle at said first end, said needle comprising: an external portion extending outside said body and terminating in a first needle end; and an internal portion extending toward said second end of said body inside said body and terminating in a second needle end inside said body; means for grasping said syringe body proximate to said second end of said syringe body; and a mobile injection rod in operative association with said grasping means and said cartridge; wherein said cartridge, containing a product to be injected, is disposed inside said body between said internal end of the needle and said second end of the body in inoperative position and is adapted to be moved from said inoperative position spaced from the second needle end of said internal portion of said needle, toward said first end of the body under die pressure of the injection rod; and elastic means disposed inside said body between the first end of the same and said cartridge; said method further comprising: exerting pressure on said mobile injection rod whereby causing said cartridge to move from said inoperative position into compressive contact with said elastic means, causing said second needle end to be introduced into said cartridge, and penetrating an object with the first needle end; and releasing said pressure on said mobile injection rod whereby causing said cartridge to move toward said inoperative position under elastic force of said elastic means, causing a suction to be drawn inside said cartridge via said needle, and causing material to be drawn from said object into said cartridge.