Patent ID: 6126635
Filing Date: 2000-10-03
Classification: A61B,A61M

Abstract:
A method for treating a diseased biological conduit, the method comprising the steps of:providing a treatment chamber catheter of the type having concentric catheter members, two concentric members each having a distal end including an inflatable balloon for creating a sealed treatment chamber within the biological conduit and between the balloons, the length of the treatment chamber being adjustable by sliding the two concentric catheter members with respect to each other, the treatment chamber catheter also including an intermediate concentric catheter member having a distal end including burden loosening means, the treatment chamber catheter further including both infusion and aspiration means for removing biological debris and excess fluid from the treatment chamber, access to the sealed treatment chamber by adjunctive catheter-type treatment devices being through a lumen;guiding the treatment chamber catheter into the biological conduit;selecting a location of a treatment site;positioning one inflatable sealing member within the conduit distally of the selected treatment site;positioning the other inflatable sealing member within the conduit proximally to the selected treatment site;adjusting the separation between the inflatable sealing members by sliding said members with respect to each other;inflating the sealing members to create a sealed treatment chamber within the conduit and between the sealing members;introducing a fluid into the chamber via the infusion means;loosening friable tissue at the treatment site by operating the catheter member including the burden loosening means; andremoving biological debris and excess fluid from the sealed treatment chamber via the aspiration means.