The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 1991
Filed:
Jan. 04, 1991
Georges Wagnieres, Lutry, CH;
Hubert van den Bergh, Goumoens-la-Ville, CH;
Philippe Monnier, Lausanne, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
An apparatus for irradiating the bronchi of a patient for the purpose of photodynamic therapy has an optical fibre (11) that feeds the light of a laser into a bronchoscope and is surrounded by a light-guide tube (8) and an outer tube (2). The distal end (13) of the optical fibre (11) is embedded in a silicone composition (17) containing 7 parts per thousand of TiO.sub.2 particles having a particle size of 0.2 .mu.m. The silicone composition (17) fills the front end of the light-guide tube (8) as far as the end face (6) of an aluminium cylinder (5) which acts as a mirror. The light dispersed by the TiO.sub.2 particles is emitted radially through the light-guide tube (8) and the front portion of the outer tube (2) and acts on the patient's bronchi.