# US 8,465,451 B2 · Methods and apparatus for introducing tumescent fluid to body tissue > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,451 B2 - Document ID: US8465451B2 - Status: Granted - Kind: B2 - Application number: 11/472,793 - Filed: 2006-06-22 - Published: 2006-12-28 - Granted: 2013-06-18 - Earliest claimed: 2005-06-22 - Assignees: Covidien LP - Applicants: Robert Gordon McRae; Michael S. Mirizzi; Brady D. Esch; Anna Grace Prestezog; Todd Schoenberger; Halil Ibrahim Karabey; Jeff Zalewski - Inventors: Robert Gordon McRae; Michael S. Mirizzi; Brady D. Esch; Anna Grace Prestezog; Todd Schoenberger; Halil Ibrahim Karabey; Jeff Zalewski - Web page: https://patentgrep.com/patent/US8465451B2 ## CPC - A61B 18/18: by applying electromagnetic radiation, e.g. microwaves - A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)} - A61M 25/0068: {Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure} - A61M 25/0082: {Catheter tip comprising a tool} - A61M 25/0084: {being one or more injection needles} - A61B 18/1477: {Needle-like probes} - A61B 2018/0016: {Energy applicators arranged in a two- or three dimensional array} - A61B 2018/00214: {Expandable means emitting energy, e.g. by elements carried thereon} - A61B 2018/00404: {Blood vessels other than those in or around the heart} - A61B 2018/1425: {Needle} - A61B 2018/1475: {Electrodes retractable in or deployable from a housing} - A61B 2218/002: Irrigation - A61M 25/0074: {Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable} - A61M 2025/0087: {Multiple injection needles protruding laterally from the distal tip} - A61M 2202/0007: introduced into the body - A61M 2210/12: Blood circulatory system - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - 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)} ## Abstract A catheter is usable to treat a hollow anatomical structure (HAS). The catheter comprises one or more shafts which extend away from a proximal end of the catheter toward a distal end thereof. The catheter further comprises an HAS constriction energy source located at or near the distal end of the catheter. The catheter further comprises at least one radially expandable transmural fluid delivery channel located in the catheter near the HAS constriction energy source. ## Claims ### Claim 1 A catheter for treating a hollow anatomical structure (HAS), said catheter comprising: one or more shafts which extend away from a proximal end of said catheter toward a distal end thereof, a first shaft of said one or more shafts defining a central axis of said catheter and having an atraumatic tip on a distal end thereof to minimize injury as the catheter is advanced within an HAS; an HAS constriction energy source located on said first shaft at or near said distal end of said first shaft and configured to apply energy to a wall of said HAS; and a transmural fluid delivery channel separate from said HAS constriction energy source and comprising a second shaft of said one or more shafts, said second shaft being radially expandable from said central axis; wherein a distal end of said transmural fluid delivery channel has a first position near said first shaft and said central axis and a second position radially expanded from said first shaft and said central axis, the second position allowing fluid to be injected into tissue outside of and surrounding said wall of said HAS; further comprising a source of tumescent fluid which is in fluid communication with said fluid delivery channel. ### Claim 2 (depends on 1) The catheter of claim 1, wherein said constriction energy source comprises an electrically resistive heating element. ### Claim 3 (depends on 2) The catheter of claim 2, wherein said resistive heating element comprises a resistive coil. ### Claim 4 (depends on 2) The catheter of claim 2, wherein said resistive heating element is located on an outer surface of said first shaft, and said outer surface also includes at least one port through which said second shaft is extendable. ### Claim 5 (depends on 1) The catheter of claim 1, wherein said constriction energy source comprises at least one electrode. ### Claim 6 (depends on 1) The catheter of claim 1, wherein said first and second shafts are coaxial. ### Claim 7 (depends on 5) The catheter of claim 5, wherein said at least one electrode comprises a plurality of electrodes, a first electrode of which is spaced longitudinally from a second electrode along an outer surface of said first shaft. ### Claim 8 (depends on 1) The catheter of claim 1, wherein said fluid delivery channel comprises at least one needle. ### Claim 9 (depends on 8) The catheter of claim 8, wherein said needle has a sharp tip and a fluid delivery port at or near said tip. ### Claim 10 (depends on 1) The catheter of claim 1, wherein said fluid delivery channel comprises at least one perforating jet. ### Claim 11 (depends on 10) The catheter of claim 10, further comprising a pressurized source of tumescent fluid that is in fluid communication with said fluid delivery channel and is configured to deliver a pressurized flow to said at least one perforating jet to thereby penetrate said wall of said HAS with said pressurized flow and without a sharp tip. ### Claim 12 (depends on 1) The catheter of claim 1, wherein said one or more catheter shafts comprise a plurality of shafts which are arranged coaxially. ### Claim 13 (depends on 1) The catheter of claim 1, wherein said distal end of said second shaft is proximal from said distal end of said first shaft. ### Claim 14 A catheter for treating a hollow anatomical structure (HAS), said catheter comprising: a shaft which extends along a longitudinal axis from a proximal end to a distal end, the shaft having an atraumatic tip at the distal end thereof to minimize tissue injury as the catheter is moved within an HAS; a therapeutic energy source located at or near a distal end of said shaft and along said longitudinal axis, said therapeutic energy source comprising at least one of an electrode and a resistive heating element and configured to atraumatically contact an inner wall of said HAS to thereby apply energy to said inner wall of said HAS; and at least one fluid delivery channel, said channel separate from said therapeutic energy source and having a delivery tip which is movable from a retracted position near the longitudinal axis of said shaft and said therapeutic energy source to a deployed position farther from said longitudinal axis of said shaft and said therapeutic energy source, wherein, in said deployed position, said at least one fluid delivery channel is configured to deliver fluid to tissue outside of said HAS; further comprising a source of tumescent fluid which is in fluid communication with said fluid delivery channel. ### Claim 15 (depends on 14) The catheter of claim 14, wherein said therapeutic energy source comprises a plurality of electrodes, a first electrode of which is spaced longitudinally along said catheter from a second electrode. ### Claim 16 (depends on 14) The catheter of claim 14, wherein said fluid delivery channel comprises at least one needle. ### Claim 17 (depends on 16) The catheter of claim 16, wherein said needle has a sharp tip and a fluid delivery port at or near said tip. ### Claim 18 (depends on 14) The catheter of claim 14, wherein said fluid delivery channel comprises at least one perforating jet. ### Claim 19 (depends on 18) The catheter of claim 18, further comprising a pressurized source of tumescent fluid that is in fluid communication with said fluid delivery channel and is configured to deliver a pressurized flow to said at least one perforating jet to thereby penetrate said inner wall of said HAS with said pressurized flow and without a sharp tip. ### Claim 20 A catheter for treating a hollow anatomical structure (HAS), said catheter comprising: a shaft which extends from a proximal end to a distal end thereof, the shaft having an outer surface that includes at least one port and the distal end having an atraumatic tip to minimize tissue injury as the catheter is moved within an HAS; a therapeutic energy source located on said shaft and at or near a distal end of said shaft, said therapeutic energy source forming an energy coupling surface which faces generally radially outward from said shaft and is configured to apply energy to said HAS; at least one fluid delivery channel comprising a needle with a sharp tip and configured to advance in a generally radial direction through the at least one port in the outer surface of the shaft to inject a fluid into tissue outside of and surrounding said HAS; wherein said energy source is a heat emitting element, said heat emitting element is a heating coil. ### Claim 21 (depends on 20) The catheter of claim 20, wherein said energy coupling surface is fixed relative to said shaft. ### Claim 22 (depends on 20) The catheter of claim 20, wherein said fluid delivery channel extends through said energy source. ### Claim 23 (depends on 20) The catheter of claim 20, wherein said energy source is an electrode. ### Claim 24 (depends on 20) The catheter of claim 20, wherein said heat emitting element is an electrically resistive heater. ### Claim 25 (depends on 20) The catheter of claim 20, wherein said fluid delivery channel extends through said heating coil. ### Claim 26 (depends on 20) The catheter of claim 20, wherein said therapeutic energy source defines a central axis and said at least one fluid delivery channel extends from said central axis to a point radially distant from said central axis.