Removal of waste products by suction during the ablation of biological tissue

US6752778B1 · kind B1 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Joachim Fiedler · Hannover, DE
• Claus Goder · Nuremberg, DE
• Eckhard Schroeder · Eckental, DE
• Bernhard Seitz · Jena, DE

Key dates

• Filing date: Apr 26, 2001
• Grant date: Jun 22, 2004
• Expiry date: Jun 4, 2021

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2009/00872
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A arrangement and processes is disclosed for the suction removal of waste products such as smoke and tissue particles in the ablation of biological tissue by means of a laser beam, wherein the laser beam is directed to the tissue through the orifice of a tubular channel and the waste products are sucked through the orifice into the channel. It is provided in an arrangement of the type mentioned above that the inner wall of the channel has at least one outlet opening for a gas in the vicinity of the orifice and the flow of gas is directed to the center of the channel and therefore toward the laser beam. In this way, it is effectively achieved that the gas does not flow through between the orifice and the treatment area so as to flow over the surface of the substance, but exits already from the orifice or from the immediate vicinity of the orifice under by suitable pressure and is guided into the interior of the channel.