Methods and devices for ablation

• US 6,719,755 B2
• Filed: 06/19/2001
• Issued: 04/13/2004
• Est. Priority Date: 10/22/1996
• Status: Expired due to Fees

• Current Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc. (Abbott Laboratories)
• Original Assignee: Epicor Medical, Inc. (Abbott Laboratories)
• Inventors: Vaska, Matthias, Richman, Roxanne L., Anderson, Scott C., Podmore, Jonathan L., Sliwa, John W. Jr., Champsaur, Gerard, Crowe, John E.
• Primary Examiner(s): PEFFLEY, MICHAEL F
• Application Number:
  US09/884,435
• Publication Number:
  US 20020072741A1
• Time in Patent Office: 1,029 Days
• Field of Search: 606/41, 606/42, 606/45, 606/46, 606/48-50, 606/27, 606/28, 607/101-105, 607/115, 607/116
• US Class Current: 606/41
• CPC Class Codes: A61B 17/22012 in direct contact with, or very close to, the obstruction or concrement for removing obstructions in blood vessels by laser A61B18/245
• CPC Class Codes: A61B 17/2202 the ultrasound transducer being inside patient's body at the distal end of the catheter
• CPC Class Codes: A61B 17/2251 characterised by coupling elements between the apparatus, e.g. shock wave apparatus or locating means, and the patient, e.g. details of bags, pressure control of bag on patient
• CPC Class Codes: A61B 18/00 Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body eye surgery A61F9/007; ear surgery A61F11/00
• CPC Class Codes: A61B 18/02 by cooling, e.g. cryogenic techniques devices for cooling specific reflex points of the body within cell-life limits A61H39/06
• CPC Class Codes: A61B 18/04 by heating by applying electromagnetic radiation A61B18/18; hyperthermia using electric or magnetic fields, radiation or ultrasound A61N
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 18/148 having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
• CPC Class Codes: A61B 18/1482 having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 18/18 by applying electromagnetic radiation, e.g. microwaves radiation therapy A61N5/00
• CPC Class Codes: A61B 18/20 using laser
• CPC Class Codes: A61B 2017/00243 cardiac
• CPC Class Codes: A61B 2017/00247 Making holes in the wall of the heart, e.g. laser Myocardial revascularization
• CPC Class Codes: A61B 2017/00252 for by-pass connections, i.e. connections from heart chamber to blood vessel or from blood vessel to blood vessel
• CPC Class Codes: A61B 2017/003 Steerable
• CPC Class Codes: A61B 2017/22077 with a part piercing the tissue A61B2017/22044 takes precedence
• CPC Class Codes: A61B 2017/2253 using a coupling gel or liquid
• CPC Class Codes: A61B 2017/3419 Sealing means between cannula and body
• CPC Class Codes: A61B 2018/00005 Cooling or heating of the probe or tissue immediately surrounding the probe
• CPC Class Codes: A61B 2018/00023 : closed, i.e. without wound contact by the fluid
• CPC Class Codes: A61B 2018/0016 : Energy applicators arranged in a two- or three dimensional array
• CPC Class Codes: A61B 2018/00214 : Expandable means emitting energy, e.g. by elements carried thereon
• CPC Class Codes: A61B 2018/00232 : having an irregular shape
• CPC Class Codes: A61B 2018/00261 : arranged in a line
• CPC Class Codes: A61B 2018/00285 : Balloons
• CPC Class Codes: A61B 2018/00291 : using suction
• CPC Class Codes: A61B 2018/00351 : Heart
• CPC Class Codes: A61B 2018/00363 : Epicardium
• CPC Class Codes: A61B 2018/00392 : Transmyocardial revascularisation
• CPC Class Codes: A61B 2018/00577 : Ablation
• CPC Class Codes: A61B 2018/00654 : with individual control of each of a plurality of energy emitting elements
• CPC Class Codes: A61B 2018/00797 : measured by multiple temperature sensors
• CPC Class Codes: A61B 2018/00839 : Bioelectrical parameters, e.g. ECG, EEG
• CPC Class Codes: A61B 2018/00898 : Alarms or notifications created in response to an abnormal condition
• CPC Class Codes: A61B 2018/00982 : combined with or comprising means for visual or photographic inspections inside the body, e.g. endoscopes
• CPC Class Codes: A61B 2018/1213 : creating an arc
• CPC Class Codes: A61B 2018/142 : at least partly surrounding the target, e.g. concave, curved or in the form of a cave
• CPC Class Codes: A61B 2018/1467 : using more than two electrodes on a single probe
• CPC Class Codes: A61B 2018/147 : Electrodes transferring energy by capacitive coupling, i.e. with a dielectricum between electrode and target tissue
• CPC Class Codes: A61B 2018/1472 : for use with liquid electrolyte, e.g. virtual electrodes
• CPC Class Codes: A61B 2090/3614 : using optical fibre
• CPC Class Codes: A61B 2090/3782 : transmitter or receiver in catheter or minimal invasive instrument
• CPC Class Codes: A61B 2090/395 : with marking agent for marking skin or other tissue
• CPC Class Codes: A61B 2218/002 : Irrigation
• CPC Class Codes: A61B 2218/007 : Aspiration
• CPC Class Codes: A61B 34/20 : Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 5/287 : Holders for multiple electrodes, e.g. electrode catheters for electrophysiological study [EPS]
• CPC Class Codes: A61N 1/056 : Transvascular endocardial electrode systems
• CPC Class Codes: A61N 1/06 : for high-frequency therapy
• CPC Class Codes: A61N 1/3629 : in combination with non-electric therapy
• CPC Class Codes: A61N 7/02 : Localised ultrasound hyperthermia hyperthermia in general A61F7/00

Abstract

An ablating device has a cover which holds an interface material such as a gel. The cover contains the interface material during initial placement of the device. The ablating device may also have a removable tip or a membrane filled with fluid. In still another aspect, the ablating device may be submerged in liquid during operation.

Claims

1. A method of ablating tissue, comprising the steps of:

providing an ablating device and a cover, the ablating device having a bottom surface, the cover being spaced apart from the bottom surface to define a fluid cavity, the fluid cavity containing a flowable material;

positioning the cover against a tissue surface;

moving the cover away from the bottom surface so that the bottom surface is exposed and positioned adjacent the tissue surface, the flowable material conforming to the shape of the tissue surface and being positioned between the bottom surface of the ablating device and the tissue surface; and

ablating the tissue after the moving step.

2. The method of claim 1, wherein:

the positioning step is carried out with the tissue surface being an epicardial surface.

3. The method of claim 1, wherein:

the moving step is carried out by moving the cover while substantially maintaining the position of the ablating device.

4. The method of claim 1, wherein:

the providing step is carried out with the cover having a removable tip.

5. The method of claim 1, wherein:

the providing step is carried out with the flowable material having a boiling temperature of at least 120 degrees C.

6. The method of claim 1, wherein:

the providing step is carried out with the flowable material being selected from the group consisting of PEG and glycerine.

7. The method of claim 1, wherein:

the providing step is carried out with the ablating device having a plurality of ablating elements.

8. The method of claim 1, wherein:

the providing and moving steps are carried out with the ablating device forming a closed loop.

9. The method of claim 8, wherein:

the providing and moving steps are carried out with the ablating device forming a closed loop around the pulmonary veins; and

the ablating step is carried out to form an ablation around the pulmonary veins.