Device for rinsing a hollow guide for carbon dioxide lasers

US5150373A · kind A · utility

Assignee

• RICHARD WOLF GMBH · DE

Inventors

• Achim Kolb · Bretten, DE
• Manfred Baier · Starnberg, DE
• Klaus Müller · Wilhelmsfeld, DE

Key dates

• Filing date: Mar 12, 1991
• Grant date: Sep 22, 1992
• Expiry date: Mar 12, 2011

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2018/00017
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The hollow guide is designed as a thin ceramic hollow tube which is guided in an outer tube while leaving a hollow space between the outer tube and the ceramic hollow tube, the outer tube being provided at its proximal end with a connecting part having a gas connection and receiving a focusing optical system. The ceramic hollow tube is guided in the outer tube through at least one mounting part arranged at the proximal end and at least one mounting part at the distal end, which in each case is supported locally with respect to the inner wall of the outer tube. The mounting parts are thus arranged so that free flow cross-sections to conduct the rinsing gas remain in the region of support, these being matched with the internal inner cross-section of the ceramic hollow tube, so that gas flow flowing past the ceramic hollow tube is produced both on the outside and on the inside. The gas flow effects cooling of the ceramic hollow tube on the one hand and prevents impurities penetrating the distal end of the ceramic hollow tube on the other hand.