Patent ID: 8078261
Filing Date: 2011-12-13
Classification: A61B

Abstract:
1. A method for transcutaneous viewing the position of, with the unaided eye and by direct viewing of the in-dwelling location of an intracorporeal catheter, and guiding insertion of said intracorporeal catheter into a body, through body tissue, comprising the steps of: a) inserting a catheter into the body, the inserted catheter having a first lumen containing a first leaky optic and a second lumen containing a second leaky optic, the first and second leaky optics running substantially the length of the catheter; and b) illuminating the catheter with a first optical source of illumination and a second optical source of illumination while a human viewer views at least a partial length of the catheter within the body, wherein illuminating the catheter includes said first leaky optic emitting a light of first optical signal propagating through blood and tissue to a human viewer outside of the body, so that the human viewer can detect at least a partial length of the catheter within the body, said first leaky optic emitting a light of first visible color wavelength visible to the naked eye and said second leaky optic emitting a light of a second visible color wavelength visible to the naked eye different from said first color, both of said colors simultaneously propagating through blood and tissue to the human viewer outside of the body viewing the combined light with the unaided eye, and based on the combined light of the first and second wavelengths, distinguishing location and penetration of the catheter by differences in light absorption through the tissue of the two color wavelengths causing externally observed color to vary according to how much of each color wavelength reaches the external viewer.