# US 8,540,667 B2 · Multi-balloon catheter for extravasated drug delivery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,667 B2 - Document ID: US8540667B2 - Status: Granted - Kind: B2 - Application number: 13/042,901 - Filed: 2011-03-08 - Published: 2011-09-08 - Granted: 2013-09-24 - Earliest claimed: 2011-03-08 - Assignees: Sanovas, Inc. - Applicants: Lawrence J. Gerrans; Erhan H. Gunday - Inventors: Lawrence J. Gerrans; Erhan H. Gunday - Web page: https://patentgrep.com/patent/US8540667B2 ## CPC - A61M 25/1011: {Multiple balloon catheters} - A61B 17/320725: {with radially expandable cutting or abrading elements (A61B17/32075 takes precedence)} - A61B 2017/22054: {with two balloons} - A61B 2017/22055: {with three or more balloons} - A61B 2017/22061: {for spreading elements apart} - A61B 2017/22082: {after introduction of a substance} - A61B 2017/22084: {stone- or thrombus-dissolving} - A61B 2017/320004: {abrasive} - A61M 2025/105: {having a balloon suitable for drug delivery, e.g. by using holes for delivery, drug coating or membranes} - A61M 2025/1052: {for temporarily occluding a vessel for isolating a sector} - A61M 2025/1086: {having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves} - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A method of extravasated delivery of a therapeutic and/or diagnostic agent to tissue is provided including inserting a catheter with a first balloon, a second balloon and a third balloon into a bodily cavity, inflating the first and second balloons by supplying fluid thereto to create a chamber, delivering the agent to the chamber, and increasing fluid pressure within the chamber by inflating the third balloon to facilitate extravasation of the agent into tissue. A multi-balloon catheter system is also provided including a catheter having a first balloon, a second balloon and a third balloon, and a fluid source that inflates the first and second balloons by supplying fluid thereto to create a chamber, wherein the catheter includes a fluid pathway for delivering the agent, and the fluid source increases fluid pressure within the chamber by supplying fluid to the third balloon such that the agent is extravasated into tissue. ## Claims ### Claim 1 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 to create a chamber between the first balloon and the second balloon, wherein the boundaries of said chamber are defined by an inner surface of the cavity wall and the catheter; delivering the therapeutic and/or diagnostic agent to the chamber; and facilitating extravasation of the agent inside said chamber and external of the third balloon into tissue by repeatedly increasing and decreasing fluid pressure within the chamber by repeatedly at least partially inflating and at least partially deflating the third balloon in pulsed fashion. ### Claim 2 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; a third balloon positioned between said first and second balloons; and a fourth balloon; inflating said first, second, and fourth balloons by supplying fluid thereto to create a chamber between the first balloon, the second balloon and the fourth balloon, and to secure the catheter in the bodily cavity; wherein the catheter includes a first catheter section connecting the first balloon and the third balloon, a second catheter section connecting the second balloon and the third balloon, and a third catheter section connecting the fourth balloon and the third balloon, wherein the first, second, and third catheter sections are interconnected inside the third balloon. ### Claim 3 (depends on 2) The method of claim 2, wherein the step of inserting the catheter into the bodily cavity includes increasing a distance between the second and third catheter sections by at least partially inflating the third balloon to insert the second and third catheter sections into different portions of the bodily cavity. ### Claim 4 (depends on 1) The method of claim 1, wherein the third balloon has a wall with an abrasive outer surface, and wherein the method further includes the step of abrading tissue in the bodily cavity by contacting the tissue with the abrasive surface when the third balloon is inflated. ### Claim 5 (depends on 1) The method of claim 1, wherein the first balloon and the second balloon each have a wall with a textured outer surface, and wherein the step of inflating the first and second balloons further comprises contacting tissue in the bodily cavity with the textured surface to prevent slippage of the surface on the tissue. ### Claim 6 (depends on 1) The method of claim 1, further comprising monitoring at least one vital sign of a patient. ### Claim 7 (depends on 1) The method of claim 1, further comprising the step of circulating the therapeutic and/or diagnostic agent within the chamber, wherein the agent enters the chamber through a first opening in the catheter positioned on one side of the third balloon and exits the chamber through a second opening in the catheter positioned on the other side of the third balloon. ### Claim 8 (depends on 1) The method of claim 1, further comprising the step of using an imaging device disposed in the catheter to visualize tissue in the bodily cavity. ### Claim 9 (depends on 1) The method of claim 1, further comprising the step of measuring at least one characteristic of tissue in the bodily cavity via at least one sensor. ### Claim 10 (depends on 1) The method of claim 1, wherein the agent is doxorubicin. ### Claim 11 (depends on 1) The method of claim 1, wherein the agent is cisplatin, and wherein the method further comprises the step of supplying a second agent, said second agent being epinephrine. ### Claim 12 (depends on 1) The method of claim 1, wherein the agent is 5-4 fluorouracil. ### Claim 13 (depends on 1) The method of claim 1, wherein the agent is noscapine. ### Claim 14 (depends on 1) The method of claim 1, wherein the agent is diltiazem augment taxol. ### Claim 15 (depends on 1) The method of claim 1, wherein the agent is crizotinib. ### Claim 16 (depends on 1) The method of claim 1, wherein the agent is erlotinib hydrochloride. ### Claim 17 (depends on 1) The method of claim 1, wherein the agent is gefitinib. ### Claim 18 (depends on 1) The method of claim 1, wherein the agent comprises drug eluting microspheres. ### Claim 19 (depends on 1) The method of claim 1, wherein the agent is a combination of at least one therapeutic agent and at least one biomarker, and wherein the method further comprises the step of monitoring extravasation of the at least one therapeutic agent into tissue via the at least one biomarker. ### Claim 20 (depends on 1) The method of claim 1, wherein a distal end of the catheter has an opening therein, and wherein the method further comprises the step of passing bodily fluids through a lumen in the catheter via the opening. ### Claim 21 (depends on 4) The method of claim 4, wherein said abrasive outer surface comprises a fiber mesh disposed on the wall of the third balloon. ### Claim 22 (depends on 5) The method of claim 5, wherein said textured outer surface comprises a fiber mesh disposed on the wall of the first and second balloons. ### Claim 23 (depends on 1) The method of claim 1, further comprising the step of measuring a patient's blood pressure. ### Claim 24 (depends on 23) The method of claim 23, wherein the step of repeatedly at least partially inflating and at least partially deflating the third balloon in pulsed fashion is based at least in part on the measured blood pressure.