US 9,539,047 B2Granted

Transvascular methods of treating extravascular tissue

AssigneeAblative Solutions, Inc.

InventorsDavid R. Fischell, Tim A. Fischell, Robert Ryan Ragland, Darrin James Kent, Andy Edward Denison, Eric Thomas Johnson, Jeff Alan Burke, Christopher Scott Hayden

Life of this patent

Estimating the term…

patentgrep

Loading patent…

Abstract

An intravascular catheter for peri-vascular or peri-urethral tissue ablation includes multiple needles advanced through supported guide tubes which expand with open ends around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, such as nerve fibers in the outer layer or deep to the outer layer of the vessel, or in prostatic tissue. The system also includes controls the depth of penetration of the ablative fluid into and beyond the tissue of the vessel wall. The preferred embodiment of the catheter includes structures which provide radial and lateral support to the guide tubes so that the guide tubes open uniformly and maintain their position against the interior surface of the vessel wall as the sharpened injection needles are advanced to penetrate into the vessel wall.

Claims20

Dependent claims

A method for ablating tissue that is located radially outward from an interior surface of an interior wall of a target vessel of a human body, the method including:

providing a tissue ablation catheter having a proximal end and a distal end, the tissue ablation catheter comprising three or more needle guiding elements through which three or more injection needles are advanced, the three or more needle guiding elements and the three or more injection needles being located at a distal portion of the tissue ablation catheter;
advancing the distal portion of the tissue ablation catheter to a site within the target vessel where tissue ablation is to be performed;
advancing the three or more needle guiding elements to expand outwardly against the interior surface of the target vessel;
advancing the three or more injection needles through the three or more guiding elements and into the interior wall of the target vessel;
and
injecting an ablative fluid through the three or more injection needles into an adventitia of the target vessel creating three or more ablative fluid zones, wherein the ablative fluid zones intersect to form an ablation ring around the circumference of, and outside the interior surface of the target vessel;
and wherein the ablative fluid is injected in a region that is more than 2 mm beyond the interior surface of the target vessel.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/932,128Filed 4 Nov 2015 · continuation
Priority: 29 Oct 2012
Published: US 2016/0120587 A15 May 2016
Granted: 10 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification27 codes

A61B 18/04
Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body: by heating
A61B 18/00
Surgical instruments, devices or methods for transferring non-mechanical forms of energy to
A61B 18/1477
Probes or electrodes therefor: needle-like probes
A61B 90/37
Image-producing devices or illumination devices not otherwise provided for: surgical systems with images on a monitor during operation

Family

Application61/719,906Us provisional application · filed 29 Oct 2012
Application13/752,062Parent of this division · filed 28 Jan 2013
Application14/096,254Parent of this continuation · filed 4 Dec 2013
US 8,740,849 B1Parent of this division · filed 3 Jun 2014
US 2016/0120587 A1Pre-grant publication · published 5 May 2016
US 9,179,962 B2Parent of this continuation
Application14/096,254Parent of this division
US 2014/0121644 A1Published application
US 9,539,047 B2This patent

From the US filing history. Foreign family members aren’t listed.