Light delivery catheter and PDT treatment method

Details Light delivery catheter and PDT treatment method Light delivery catheter and PDT treatment method

1997-09-23

2000-08-01

Peffley, Michael

Surgery

Instruments

Light application

606 15, 607 92, A61B 1736

Patent

active

060960302

ABSTRACT:
A light delivery catheter (2), for use in PDT treatments, includes a hollow sheath (4) with a balloon (24) at its distal end. Target tissue (33) at a target site on a hollow body organ, such as a blood vessel, is inoculated with an appropriate photosensitizing agent. A light guide (14) extends along the sheath and has a light-radiating portion or light source (20) at its end within the balloon. The balloon is positioned at the target site and target tissue is irradiated causing destruction of the target tissue. The balloon defines perfusion channels (30) when the balloon is inflated so that during use fluid can continue passing through the blood vessel. The light irradiating the vessel wall is preferably of generally equal intensity. This can be achieved in whole or in part in several different ways.

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