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. 26, 1999
Filed:
Aug. 14, 1997
Ulf Zanger, Weingarten, DE;
Richard Wolf GmbH, Knittlingen, DE;
Abstract
The invention relates to a device for the photodynamic endoscopic diagnosis of human or animal tumor tissue with the help of a marker substance capable of fluorescence and with an endoscope and a light source. With this, means are provided in order to guide light from the light source via an endoscope to the diagnosis location in each case in one of at least two selectable spectral regions, that is in a white light region and in a region with blue-violet light, in order thus in each case to be able to carry out a visual examination with white light and stimulate a marker substance deposited in any tumor tissue to fluoresce. The means for selecting the light comprises an anti-fading filter which can be pivoted into the beam path of the white stimulation light on examination with white light and which filters out light, lying in spectral region stimulating fluorescence, from the white light. This anti-fading filter, together with other color filters may be mounted on a pivoting wing which can be selectively pivoted by the examining surgeon into the light path between the light source and the light guide cable, the pivoting wing being movable by way of a pivoting device.