Multi-Balloon Catheter for Extravasated Drug Delivery

A method of extravasated delivery of a therapeutic and/or diagnostic agent to tissue, comprising the steps of:

• inserting a catheter into a bodily cavity, said catheter comprising
• a first balloon;
• a second balloon;
• and
• a third balloon positioned between said first and second balloons;
• inflating said first and second balloons by supplying fluid thereto to create a chamber between the first balloon and the second balloon;
• delivering the therapeutic and/or diagnostic agent to the chamber;
• and
• increasing fluid pressure within the chamber by at least partially inflating the third balloon by supplying fluid thereto to facilitate extravasation of the agent into tissue in the bodily cavity.

A multi-balloon catheter system for delivering a therapeutic and/or diagnostic agent to tissue, comprising:

• a catheter having a first balloon, a second balloon, and a third balloon positioned between said first and second balloons;
• and
• a fluid source that inflates said first and second balloons by supplying fluid thereto to create a chamber between the first balloon and the second balloon;
• wherein said catheter has a fluid pathway for delivering the therapeutic and/or diagnostic agent to the chamber;
• and
• wherein the fluid source increases fluid pressure within the chamber by supplying fluid to said third balloon such that the agent is extravasated into tissue.