CA2388823C - Coiled ablation catheter system - Google Patents
Coiled ablation catheter system Download PDFInfo
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- CA2388823C CA2388823C CA002388823A CA2388823A CA2388823C CA 2388823 C CA2388823 C CA 2388823C CA 002388823 A CA002388823 A CA 002388823A CA 2388823 A CA2388823 A CA 2388823A CA 2388823 C CA2388823 C CA 2388823C
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- catheter
- sheath
- stent
- ablating element
- ablating
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/88—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/00867—Material properties shape memory effect
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
- A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
- A61B2018/00029—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids open
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00059—Material properties
- A61B2018/00071—Electrical conductivity
- A61B2018/00083—Electrical conductivity low, i.e. electrically insulating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00107—Coatings on the energy applicator
- A61B2018/00136—Coatings on the energy applicator with polymer
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00214—Expandable means emitting energy, e.g. by elements carried thereon
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00345—Vascular system
- A61B2018/00351—Heart
- A61B2018/00375—Ostium, e.g. ostium of pulmonary vein or artery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1435—Spiral
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1497—Electrodes covering only part of the probe circumference
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2002/821—Ostial stents
Abstract
A cardiac ablation catheter (100) includes a coil-like ablating element (102) that is deployed from an elongate, flexible sheath (104).
The ablating element (102), while in the deployed position, has a shape with at least one revolution oriented in a plane that is orthogonal to a longitudinal axis (108) of the sheath. The catheter system (100) is well-suited to ablate a circumferential region of tissue about a pulmonary vein or the posterior wall of the left atrium proximate the pulmonary vein os. The treated tissue region electrically isolates the atria from the pulmonary vein.
The ablating element (102), while in the deployed position, has a shape with at least one revolution oriented in a plane that is orthogonal to a longitudinal axis (108) of the sheath. The catheter system (100) is well-suited to ablate a circumferential region of tissue about a pulmonary vein or the posterior wall of the left atrium proximate the pulmonary vein os. The treated tissue region electrically isolates the atria from the pulmonary vein.
Description
COILED ABLATION CATHETER SYSTEM
FIELD OF THE INVENTION
The present invention relates generally to catheter systems, and more particularly, to catheter systems for ablating and/or isolating foci that contribute to cardiac arrhythmia.
BACKGROUND OF THE INVENTION
Catheters are commonly used in surgical procedures to access certain areas of a patient's body without resorting to invasive surgical procedures. For example, catheters are widely used in the field of cardiology to conduct electrophysiological studies in which electrical potentials within the heart are mapped to determine the cause and location of arrhythmia. In many cases, certain undesired conductive pathways, known as foci, contribute to and cause the arrhythmia. Once the location of foci is identified, elements on or within the catheter can be utilized to ablate or isolate the foci, thus eliminating the arrhythmia.
One form of arrhythmia is atrial fibrillation, which is an uncoordinated contraction of the heart muscle within the atrium. Atrial fibrillation results from rapidly discharging foci and causes irregular heart beats, possibly leading to inefficient pumping of blood. In a significant number of patients, the foci that contribute to this condition are located within the pulmonary vein, adjacent to the atrium. These foci may be in the form of scattered groups of rapidly discharging cells. Treatment of this condition can sometimes be effective through the ablation of these foci.
However, identifying the location of these foci and effecting the ablative treatment of the foci can be time consuming and difficult.
A variety of cardiac mapping and ablation catheter systems are well known in the art. For example, U.S. Patent No. 5,476,495 (Kordis et al.) discloses a steerable catheter system that is able to conduct cardiac mapping and ablation. U.S.
Patent No.
5,507,743 (Edwards et al.) discloses a radio frequency (RF) treatment apparatus that includes a RF electrode that assumes a helical orientation upon deployment.
U.S.
Patent No. 5,738,683 (Osypka) discloses a cardiac mapping/ablation catheter that includes an electrode that may be deployed in the shape of a loop. U.S. Patent No.
5,782,879 (Imran) discloses an endocardial mapping and ablation system in which the catheter includes a deployable distal extremity, in the form of a cage-like member that includes a plurality of electrodes.
Despite the existence of these references and existing ablation catheter systems, there exists a need to provide a system that is able to effectively treat atrial fibrillation conditions that are caused by foci present within the pulmonary vein.
SUMMARY OF THE INVENTION
The present invention provides a cardiac catheter system for ablating tissue to electrically isolate certain tissue from arrhythmia-inducing foci. Although the invention is primarily shown and described as a cardiac catheter system for ablating tissue with RF
energy, it is understood that the system has other applications and embodiments as well.
For example, other types of energy, such as microwave, laser, cryogenic, and ultrasonic energy, can be used without departing from the scope of the invention.
In one embodiment, a cardiac ablation catheter system includes an elongate, flexible sheath having an internal lumen and an open distal end. An ablating element is disposed within the sheath and is selectively deployable therefrom so as to project from the sheath in a substantially coil-like shape. In an exemplary embodiment, the deployed ablating element has a geometry forming at least one revolution for generating a circumferential lesion within a vessel, such as a pulmonary vein. In general, the ablating element is oriented in a plane that is substantially orthogonal to the longitudinal axis of the sheath in the deployed position to facilitate the formation of a lesion about the vein inner wall circumference.
The catheter system can include a variety of mechanisms for deploying the ablation member from the catheter. In one embodiment, the ablation member is released from a distal end of the catheter such that it assumes a predetermined shape.
In another embodiment, the catheter includes a hatch or port from which the ablation member is selectively deployed. In a further embodiment, the elongate member includes a distal end
FIELD OF THE INVENTION
The present invention relates generally to catheter systems, and more particularly, to catheter systems for ablating and/or isolating foci that contribute to cardiac arrhythmia.
BACKGROUND OF THE INVENTION
Catheters are commonly used in surgical procedures to access certain areas of a patient's body without resorting to invasive surgical procedures. For example, catheters are widely used in the field of cardiology to conduct electrophysiological studies in which electrical potentials within the heart are mapped to determine the cause and location of arrhythmia. In many cases, certain undesired conductive pathways, known as foci, contribute to and cause the arrhythmia. Once the location of foci is identified, elements on or within the catheter can be utilized to ablate or isolate the foci, thus eliminating the arrhythmia.
One form of arrhythmia is atrial fibrillation, which is an uncoordinated contraction of the heart muscle within the atrium. Atrial fibrillation results from rapidly discharging foci and causes irregular heart beats, possibly leading to inefficient pumping of blood. In a significant number of patients, the foci that contribute to this condition are located within the pulmonary vein, adjacent to the atrium. These foci may be in the form of scattered groups of rapidly discharging cells. Treatment of this condition can sometimes be effective through the ablation of these foci.
However, identifying the location of these foci and effecting the ablative treatment of the foci can be time consuming and difficult.
A variety of cardiac mapping and ablation catheter systems are well known in the art. For example, U.S. Patent No. 5,476,495 (Kordis et al.) discloses a steerable catheter system that is able to conduct cardiac mapping and ablation. U.S.
Patent No.
5,507,743 (Edwards et al.) discloses a radio frequency (RF) treatment apparatus that includes a RF electrode that assumes a helical orientation upon deployment.
U.S.
Patent No. 5,738,683 (Osypka) discloses a cardiac mapping/ablation catheter that includes an electrode that may be deployed in the shape of a loop. U.S. Patent No.
5,782,879 (Imran) discloses an endocardial mapping and ablation system in which the catheter includes a deployable distal extremity, in the form of a cage-like member that includes a plurality of electrodes.
Despite the existence of these references and existing ablation catheter systems, there exists a need to provide a system that is able to effectively treat atrial fibrillation conditions that are caused by foci present within the pulmonary vein.
SUMMARY OF THE INVENTION
The present invention provides a cardiac catheter system for ablating tissue to electrically isolate certain tissue from arrhythmia-inducing foci. Although the invention is primarily shown and described as a cardiac catheter system for ablating tissue with RF
energy, it is understood that the system has other applications and embodiments as well.
For example, other types of energy, such as microwave, laser, cryogenic, and ultrasonic energy, can be used without departing from the scope of the invention.
In one embodiment, a cardiac ablation catheter system includes an elongate, flexible sheath having an internal lumen and an open distal end. An ablating element is disposed within the sheath and is selectively deployable therefrom so as to project from the sheath in a substantially coil-like shape. In an exemplary embodiment, the deployed ablating element has a geometry forming at least one revolution for generating a circumferential lesion within a vessel, such as a pulmonary vein. In general, the ablating element is oriented in a plane that is substantially orthogonal to the longitudinal axis of the sheath in the deployed position to facilitate the formation of a lesion about the vein inner wall circumference.
The catheter system can include a variety of mechanisms for deploying the ablation member from the catheter. In one embodiment, the ablation member is released from a distal end of the catheter such that it assumes a predetermined shape.
In another embodiment, the catheter includes a hatch or port from which the ablation member is selectively deployed. In a further embodiment, the elongate member includes a distal end
-2-affixed to a support member that is extendable from the catheter distal end.
By rotating and/or longitudinally displacing the support member, the ablation member can be deployed such it assumes a desired size.
To ablate or isolate the target foci tissue, the catheter is manipulated through the arterial network until the catheter is located proximate the desired treatment site. For example, the treatment site may be a location within the pulmonary vein or left atrium at or near the pulmonary vein os or in the right ventricular outflow tract, such as at the junction of the right atrium and superior vena cava. The ablating element is then deployed from the catheter such that the coil-like ablating element is generally oriented in a plane orthogonal to the longitudinal axis of the sheath. The deployed ablating element should be in contact with tissue about the circumference of the vein inner wall, such as at the os. The ablation element is then energized to ablate the target tissue to electrically isolate the foci from healthy tissue on the opposite side of the formed lesion. The atria, for example, can be electrically isolated from a treated pulmonary vein by creating a circumferential lesion on the inner wall of the left atrium or in the pulmonary vein proximate the os.
Accordingly, in one aspect the present invention resides in an ablative stent device comprising: a self-expanding stent adapted to be implanted and deployed within a vessel to provide circumferential support of the vessel; said stent including a proximal portion having a first diameter and an ablation region along at least a portion of its length, the ablation region being adapted for surface contact with the vessel and the ablation region subtending at least a substantially complete circumferential band and being effective to ablate a signal-blocking path within the vessel upon application of energy to the stent, the stent further including a distal portion having a second diameter that is less than the first diameter and that is sufficient to enable the stent to seat within the vessel.
In another aspect, the present invention resides in a catheter for use in ablating a selected region of body tissue, comprising:
(a) the catheter comprising:
By rotating and/or longitudinally displacing the support member, the ablation member can be deployed such it assumes a desired size.
To ablate or isolate the target foci tissue, the catheter is manipulated through the arterial network until the catheter is located proximate the desired treatment site. For example, the treatment site may be a location within the pulmonary vein or left atrium at or near the pulmonary vein os or in the right ventricular outflow tract, such as at the junction of the right atrium and superior vena cava. The ablating element is then deployed from the catheter such that the coil-like ablating element is generally oriented in a plane orthogonal to the longitudinal axis of the sheath. The deployed ablating element should be in contact with tissue about the circumference of the vein inner wall, such as at the os. The ablation element is then energized to ablate the target tissue to electrically isolate the foci from healthy tissue on the opposite side of the formed lesion. The atria, for example, can be electrically isolated from a treated pulmonary vein by creating a circumferential lesion on the inner wall of the left atrium or in the pulmonary vein proximate the os.
Accordingly, in one aspect the present invention resides in an ablative stent device comprising: a self-expanding stent adapted to be implanted and deployed within a vessel to provide circumferential support of the vessel; said stent including a proximal portion having a first diameter and an ablation region along at least a portion of its length, the ablation region being adapted for surface contact with the vessel and the ablation region subtending at least a substantially complete circumferential band and being effective to ablate a signal-blocking path within the vessel upon application of energy to the stent, the stent further including a distal portion having a second diameter that is less than the first diameter and that is sufficient to enable the stent to seat within the vessel.
In another aspect, the present invention resides in a catheter for use in ablating a selected region of body tissue, comprising:
(a) the catheter comprising:
-3-an elongate, flexible sheath having an internal lumen, an open distal end and a longitudinal axis;
an ablating element disposed within the sheath and selectively deployable therefrom so as to project from the sheath in a pulmonary vein with a substantially coil-like shape having at least one revolution, wherein the ablating element is positionable, in a deployed condition, is in a plane that is substantially orthogonal to the longitudinal axis of the sheath; and at least one exposed, conductive region disposed on at least a portion of the ablating element;
(b) the ablating element being distally advancable out of the sheath to allow the ablating element to form a substantially coil-like shape having at least one revolution;
(c) the ablating element having a conductive region sized for contact along a selected circumferential region of body tissue at the pulmonary vein; and wherein (d) the catheter is operable to transmit ablating energy to the ablating element while contacting the selected region of body tissue to form a circumferential lesion blocking arythmia signals originating in the pulmonary vein.
In a further aspect, the present invention resides in a catheter for use in ablating a selected region of body tissue, comprising the steps of:
(a) the catheter comprising:
an elongate, flexible sheath having an internal lumen, an open distal end and a longitudinal axis;
an ablating element disposed within the sheath and selectively deployable therefrom so as to project from the sheath in a substantially coil-like shape having at least one revolution, wherein the ablating element, in a -3a-deployed condition is oriented in a plane that is substantially orthogonal to the longitudinal axis of the sheath; and at least one exposed, conductive region disposed on at least a portion of the ablating element;
(b) the ablating element being advancable distally out of the sheath to allow the ablating element to form a substantially coil-like shape having at least one revolution and a conductive region which is contactable with a selected region of body tissue; and (c) wherein the catheter is operable to transmit ablating energy to the ablating element while contacting the selected region of body tissue.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a perspective new of an ablation catheter system in accordance with the present invention;
FIG. 2 is a side view of a portion of the catheter system of FIG. 1;
FIG. 3 is a front view of a portion of the catheter system of FIG 1;
FIG. 4 is a pictorial representation of the orientation of an ablating element in a deployed position and a catheter that forms a part of the catheter system of FIG. 1;
FIG. 5 is a perspective view of an alternative geometry for an ablating element;
FIG. 6 is a perspective view of a further embodiment of an ablation catheter system in accordance with the present invention;
-3b-FIG. 7 is a perspective view of another embodiment of an ablation catheter in accordance with the present invention;
FIG. 7A is a pictorial representation of an alternative embodiment of an ablation catheter in accordance with the present invention;
FIG. 8A is a pictorial representation of a further embodiment of an ablation catheter in accordance with the present invention shown in a first position;
FIG. 8B is a pictorial representation of the catheter of FIG. 8A shown in a second position;
FIG. 8C is a pictorial representation of the catheter system of FIG. 8A shown in a a third position; and FIG. 9 is a perspective view of another embodiment of an ablation catheter system in accordance with the present invention.
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1-3 show an ablation catheter system 100 in accordance with the present invention having an ablation element 102 that is deployable from a flexible elongate catheter or sheath 104. The catheter sheath 104 should be semi-rigid and flexible so as to be readily steerable to a desired location in a patient's body, such as proximate the os of a pulmonary vein. Such catheter delivery systems are well known to those of ordinary skill in the art. In general, the deployed coil-like ablation element 102 has a shape that includes one or more revolutions substantially oriented in a transverse plane 106 (FIG. 4) that is orthogonal to a longitudinal axis 108 of the sheath 104.
This geometry facilitates treating tissue about a circumference of a vessel, such as a pulmonary vein. The circumferential region of ablated tissue electrically isolates tissue on opposite sides of the ablated tissue. Thus, the atria, for example, can be electrically isolated from any arrhythmia-inducing foci within the pulmonary vein.
In one embodiment, the catheter system 100 includes a tubular inner member 110 for housing the ablation member 102 in the non-deployed position. In general, it is preferred that the inner member 102 be formed from an insulative material to prevent
an ablating element disposed within the sheath and selectively deployable therefrom so as to project from the sheath in a pulmonary vein with a substantially coil-like shape having at least one revolution, wherein the ablating element is positionable, in a deployed condition, is in a plane that is substantially orthogonal to the longitudinal axis of the sheath; and at least one exposed, conductive region disposed on at least a portion of the ablating element;
(b) the ablating element being distally advancable out of the sheath to allow the ablating element to form a substantially coil-like shape having at least one revolution;
(c) the ablating element having a conductive region sized for contact along a selected circumferential region of body tissue at the pulmonary vein; and wherein (d) the catheter is operable to transmit ablating energy to the ablating element while contacting the selected region of body tissue to form a circumferential lesion blocking arythmia signals originating in the pulmonary vein.
In a further aspect, the present invention resides in a catheter for use in ablating a selected region of body tissue, comprising the steps of:
(a) the catheter comprising:
an elongate, flexible sheath having an internal lumen, an open distal end and a longitudinal axis;
an ablating element disposed within the sheath and selectively deployable therefrom so as to project from the sheath in a substantially coil-like shape having at least one revolution, wherein the ablating element, in a -3a-deployed condition is oriented in a plane that is substantially orthogonal to the longitudinal axis of the sheath; and at least one exposed, conductive region disposed on at least a portion of the ablating element;
(b) the ablating element being advancable distally out of the sheath to allow the ablating element to form a substantially coil-like shape having at least one revolution and a conductive region which is contactable with a selected region of body tissue; and (c) wherein the catheter is operable to transmit ablating energy to the ablating element while contacting the selected region of body tissue.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a perspective new of an ablation catheter system in accordance with the present invention;
FIG. 2 is a side view of a portion of the catheter system of FIG. 1;
FIG. 3 is a front view of a portion of the catheter system of FIG 1;
FIG. 4 is a pictorial representation of the orientation of an ablating element in a deployed position and a catheter that forms a part of the catheter system of FIG. 1;
FIG. 5 is a perspective view of an alternative geometry for an ablating element;
FIG. 6 is a perspective view of a further embodiment of an ablation catheter system in accordance with the present invention;
-3b-FIG. 7 is a perspective view of another embodiment of an ablation catheter in accordance with the present invention;
FIG. 7A is a pictorial representation of an alternative embodiment of an ablation catheter in accordance with the present invention;
FIG. 8A is a pictorial representation of a further embodiment of an ablation catheter in accordance with the present invention shown in a first position;
FIG. 8B is a pictorial representation of the catheter of FIG. 8A shown in a second position;
FIG. 8C is a pictorial representation of the catheter system of FIG. 8A shown in a a third position; and FIG. 9 is a perspective view of another embodiment of an ablation catheter system in accordance with the present invention.
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1-3 show an ablation catheter system 100 in accordance with the present invention having an ablation element 102 that is deployable from a flexible elongate catheter or sheath 104. The catheter sheath 104 should be semi-rigid and flexible so as to be readily steerable to a desired location in a patient's body, such as proximate the os of a pulmonary vein. Such catheter delivery systems are well known to those of ordinary skill in the art. In general, the deployed coil-like ablation element 102 has a shape that includes one or more revolutions substantially oriented in a transverse plane 106 (FIG. 4) that is orthogonal to a longitudinal axis 108 of the sheath 104.
This geometry facilitates treating tissue about a circumference of a vessel, such as a pulmonary vein. The circumferential region of ablated tissue electrically isolates tissue on opposite sides of the ablated tissue. Thus, the atria, for example, can be electrically isolated from any arrhythmia-inducing foci within the pulmonary vein.
In one embodiment, the catheter system 100 includes a tubular inner member 110 for housing the ablation member 102 in the non-deployed position. In general, it is preferred that the inner member 102 be formed from an insulative material to prevent
-4-unintended contact with tissue, for example. Exemplary materials for the insulative inner member 110 include Teflon and polyethylene.
The elongate ablation element 102 can have a variety of geometries that are effective to form a generally annular lesion about a circumference of a vessel wall.
Exemplary geometries include annular shapes having one or more revolutions, crenulated, corrugated, and combinations thereof. It is understood that the term "revolution" should be construed broadly to include configurations of somewhat less than three hundred and sixty degrees. It is further understood that the transverse plane 106 on which the revolutions of the elongate member are located provides a general frame of reference and that the elongate member can vary in distance from the plane as the elongate member forms a revolution.
In the exemplary embodiment of FIGS. 1-3, which shows the ablation member 102 in the deployed state, the ablation member 102 has a coil-like appearance that forms approximately one revolution generally oriented in the transverse plane 106 that is substantially orthogonal to a longitudinal axis 108 of the sheath. This configuration is well-suited for contacting a vessel inner wall about its circumference or for contacting the posterior wall of the left atrium to circumscribe the os of a pulmonary vein. The resultant circumferential lesion on the atrial or vessel wall can be effective to isolate electrical impulses from the offending foci from passing to healthy tissue on the opposite side of the lesion.
FIG. 5 shows the catheter system 100' including an ablation member 102' having an alternative, crenulated geometry. That is, the ablation member 102' undulates so as to intersect the transverse plane 106' at defined intervals along a revolution. This configuration may inhibit or limit stenosis of the treated vessel proximate the circumferential lesion. The ablation member 102' can be partly surrounded by an insulative coating 112.
In one embodiment, the ablation member 102 is formed from a conductive elastic or superelastic shape memory material for ablating tissue with RF
energy.
Exemplary shape memory materials include nickel-titanium alloys, such as Nitinol, and copper based alloys. It is understood that shape memory materials, in general, can be
The elongate ablation element 102 can have a variety of geometries that are effective to form a generally annular lesion about a circumference of a vessel wall.
Exemplary geometries include annular shapes having one or more revolutions, crenulated, corrugated, and combinations thereof. It is understood that the term "revolution" should be construed broadly to include configurations of somewhat less than three hundred and sixty degrees. It is further understood that the transverse plane 106 on which the revolutions of the elongate member are located provides a general frame of reference and that the elongate member can vary in distance from the plane as the elongate member forms a revolution.
In the exemplary embodiment of FIGS. 1-3, which shows the ablation member 102 in the deployed state, the ablation member 102 has a coil-like appearance that forms approximately one revolution generally oriented in the transverse plane 106 that is substantially orthogonal to a longitudinal axis 108 of the sheath. This configuration is well-suited for contacting a vessel inner wall about its circumference or for contacting the posterior wall of the left atrium to circumscribe the os of a pulmonary vein. The resultant circumferential lesion on the atrial or vessel wall can be effective to isolate electrical impulses from the offending foci from passing to healthy tissue on the opposite side of the lesion.
FIG. 5 shows the catheter system 100' including an ablation member 102' having an alternative, crenulated geometry. That is, the ablation member 102' undulates so as to intersect the transverse plane 106' at defined intervals along a revolution. This configuration may inhibit or limit stenosis of the treated vessel proximate the circumferential lesion. The ablation member 102' can be partly surrounded by an insulative coating 112.
In one embodiment, the ablation member 102 is formed from a conductive elastic or superelastic shape memory material for ablating tissue with RF
energy.
Exemplary shape memory materials include nickel-titanium alloys, such as Nitinol, and copper based alloys. It is understood that shape memory materials, in general, can be
-5-plastically deformed from a first shape at a relatively low temperature. Upon heating the material to some higher temperature, such as by resistive heating, the material will tend to return to the first shape. Such materials can have so-called one-way and two-way shape memories.
In further embodiments (not shown), the ablation member can be at least partly surrounded by an insulative coating. The insulative coating can be disposed on the ablation member so as to form a plurality of discrete electrodes for ablating tissue at selected locations along the vessel circumference.
The ablation element can be deployed from the sheath using a variety of mechanisms that are compatible with steerable catheter systems. Exemplary mechanisms include predetermined shapes for the elongate member, manual deployment mechanisms, and guide-wire based mechanisms.
FIG. 6 shows an ablation catheter system 200 having an ablation member 202 with a distal end 204 secured to a bulbous end 206 of a support member 208.
The support member 208 is disposed within the sheath 210 and connected to an actuator (not shown) at a proximal end of the catheter. To deploy the ablation member 202, the support member 208 is longitudinally displaced with respect to the sheath such that the bulbous end 206 protrudes from the end 212 of the catheter. Upon exiting the sheath 210, the ablation member 202 assumes a predetermined shape that includes about one revolution in a transverse plane 214 orthogonal to the sheath longitudinal axis 216. The ablation member 202 can extend from a retractable support wire 218.
In one embodiment, the bulbous end 206 of the support member is radiopaque to facilitate determining the ablation member position on an external viewing system, such as an X-ray system.
Alternatively, the ablation member 202 can be wound on the support member 208 in the non-deployed state. The support member 208 can be rotated in a predetermined direction such that the ablation member 202 is unwound or released from the support member. The support member 208 can be rotated until the ablation member extends from the support member a desired distance. After ablation, the
In further embodiments (not shown), the ablation member can be at least partly surrounded by an insulative coating. The insulative coating can be disposed on the ablation member so as to form a plurality of discrete electrodes for ablating tissue at selected locations along the vessel circumference.
The ablation element can be deployed from the sheath using a variety of mechanisms that are compatible with steerable catheter systems. Exemplary mechanisms include predetermined shapes for the elongate member, manual deployment mechanisms, and guide-wire based mechanisms.
FIG. 6 shows an ablation catheter system 200 having an ablation member 202 with a distal end 204 secured to a bulbous end 206 of a support member 208.
The support member 208 is disposed within the sheath 210 and connected to an actuator (not shown) at a proximal end of the catheter. To deploy the ablation member 202, the support member 208 is longitudinally displaced with respect to the sheath such that the bulbous end 206 protrudes from the end 212 of the catheter. Upon exiting the sheath 210, the ablation member 202 assumes a predetermined shape that includes about one revolution in a transverse plane 214 orthogonal to the sheath longitudinal axis 216. The ablation member 202 can extend from a retractable support wire 218.
In one embodiment, the bulbous end 206 of the support member is radiopaque to facilitate determining the ablation member position on an external viewing system, such as an X-ray system.
Alternatively, the ablation member 202 can be wound on the support member 208 in the non-deployed state. The support member 208 can be rotated in a predetermined direction such that the ablation member 202 is unwound or released from the support member. The support member 208 can be rotated until the ablation member extends from the support member a desired distance. After ablation, the
-6-ablation member 202 can be retracted to the non-deployed state by rotating the support member in the opposite direction.
FIG. 7 shows an ablation catheter system 300 including a guide wire 302 for manipulating a catheter 304 within the patient's body. It is understood that the guide wire 302 can be utilized in conjunction with mapping systems (which may be separate from or integral with the catheter system 300) to locate arrhythmic foci. The catheter 304 includes a hatch 306 from which an ablation member 308 can be deployed.
Upon actuating the hatch 306 to the open position, the ablation member 308 discharges from the resultant opening 310 and assumes a predetermined configuration. It is understood that the predetermined annular shape will be effective to contact vessel walls having a circumference less than or equal to a predetermined value, which by way of example, may be in the range of about 0.4 centimeters to about 4.0 centimeters.
FIG. 7A shows an alternative embodiment of a catheter system 350 including an ablation member 352 having an exposed proximal portion 354 for ablating tissue and an insulated distal portion 356 for centering the catheter within a pulmonary vein 358.
The catheter system 350 is well suited for creating a circumferential lesion on the posterior left atrial wall 360 around the pulmonary vein os 362.
FIGS. 8A-C show a manually expandable ablation member 402 that forms a part of a cardiac ablation catheter system 400 in accordance with the present invention. The system 400 includes a guide-wire based catheter 404 with an ablation member 406 that is manually deployable from the catheter. In one embodiment, the ablation member 406 is coupled to a semi-rigid support member 408 (FIG. 8C) that can be rotated and/or longitudinally displaced so as to deploy the ablation member 406. The size of the loop formed by the ablation member 406 can be selected by controlling the amount of rotation/displacement of the support member 408. Alternatively, the leading end of the ablation element can be affixed to the guide wire. In one embodiment, the ablating element can be manipulated by rotating the guide wire.
FIG. 9 shows a further embodiment of a guide-wire based ablation catheter system 500 having a manually deployable ablation member 502. This system is similar to the system 200 shown in FIG 6 with the addition of a guide wire 504 that can
FIG. 7 shows an ablation catheter system 300 including a guide wire 302 for manipulating a catheter 304 within the patient's body. It is understood that the guide wire 302 can be utilized in conjunction with mapping systems (which may be separate from or integral with the catheter system 300) to locate arrhythmic foci. The catheter 304 includes a hatch 306 from which an ablation member 308 can be deployed.
Upon actuating the hatch 306 to the open position, the ablation member 308 discharges from the resultant opening 310 and assumes a predetermined configuration. It is understood that the predetermined annular shape will be effective to contact vessel walls having a circumference less than or equal to a predetermined value, which by way of example, may be in the range of about 0.4 centimeters to about 4.0 centimeters.
FIG. 7A shows an alternative embodiment of a catheter system 350 including an ablation member 352 having an exposed proximal portion 354 for ablating tissue and an insulated distal portion 356 for centering the catheter within a pulmonary vein 358.
The catheter system 350 is well suited for creating a circumferential lesion on the posterior left atrial wall 360 around the pulmonary vein os 362.
FIGS. 8A-C show a manually expandable ablation member 402 that forms a part of a cardiac ablation catheter system 400 in accordance with the present invention. The system 400 includes a guide-wire based catheter 404 with an ablation member 406 that is manually deployable from the catheter. In one embodiment, the ablation member 406 is coupled to a semi-rigid support member 408 (FIG. 8C) that can be rotated and/or longitudinally displaced so as to deploy the ablation member 406. The size of the loop formed by the ablation member 406 can be selected by controlling the amount of rotation/displacement of the support member 408. Alternatively, the leading end of the ablation element can be affixed to the guide wire. In one embodiment, the ablating element can be manipulated by rotating the guide wire.
FIG. 9 shows a further embodiment of a guide-wire based ablation catheter system 500 having a manually deployable ablation member 502. This system is similar to the system 200 shown in FIG 6 with the addition of a guide wire 504 that can
-7-provide additional stability during ablation. The catheter 506 is mounted on the guide wire 504 to facilitate advancement of the catheter into the pulmonary vein.
One skilled in the art will appreciate further features and advantages of the invention based on the above-described embodiments. Accordingly, the invention is not to be limited by what has been particularly shown and described, except as indicated by the appended claims. All publications and references cited herein are expressly incorporated herein by reference in their entirety.
What is claimed is:
One skilled in the art will appreciate further features and advantages of the invention based on the above-described embodiments. Accordingly, the invention is not to be limited by what has been particularly shown and described, except as indicated by the appended claims. All publications and references cited herein are expressly incorporated herein by reference in their entirety.
What is claimed is:
-8-
Claims (15)
1. An ablative stent device comprising: a self-expanding stent adapted to be implanted and deployed within a vessel to provide circumferential support of the vessel; said stent including a proximal portion having a first diameter and an ablation region along at least a portion of its length, the ablation region being adapted for surface contact with the vessel and the ablation region subtending at least a substantially complete circumferential band and being effective to ablate a signal-blocking path within the vessel upon application of energy to the stent, the stent further including a distal portion having a second diameter that is less than the first diameter and that is sufficient to enable the stent to seat within the vessel.
2. The device of claim 1, wherein said ablation region comprises a winding at the proximal end of said stent.
3. A stent device for use in treating atrial fibrillation, the stent device including a proximal portion having a first diameter and an ablation region along at least a portion of its length, the ablation region being adapted for surface contact with a pulmonary vessel and the ablation region subtending at least a substantially complete circumferential band and being effective to ablate a signal-blocking path within the vessel upon application of energy to the stent, the stent further including a distal portion having a second diameter that is less than the first diameter and that is sufficient to enable the stent to seat within the vessel, and wherein the energization of at least a portion of the stent is operable to ablate a blocking lesion proximate the os.
4. The stent of claim 3, wherein said portion is sized to enable the device to be positioned to ablate a circumferential blocking lesion of the pulmonary vein wall.
5. The stent of claim 3, wherein said portion is sized to enable the device to be positioned to ablate a blocking lesion in posterior left atrium endocardial surface tissue substantially surrounding the os.
6. A stent device, comprising:
a self-expanding, implantable stent having a proximal portion with a first diameter and a conductive, ablation region along at least a portion of its length and adapted to contact adjacent tissue, the ablation region subtending at least a substantially complete circumferential band and being effective to ablate a signal blocking path within the tissue upon application of energy to the ablation region, the stent further including a distal portion having a second diameter that is less than the first diameter and that is sufficient to enable the stent to seat within the vessel.
a self-expanding, implantable stent having a proximal portion with a first diameter and a conductive, ablation region along at least a portion of its length and adapted to contact adjacent tissue, the ablation region subtending at least a substantially complete circumferential band and being effective to ablate a signal blocking path within the tissue upon application of energy to the ablation region, the stent further including a distal portion having a second diameter that is less than the first diameter and that is sufficient to enable the stent to seat within the vessel.
7. A catheter for use in ablating a selected region of body tissue, comprising:
(a) the catheter comprising:
an elongate, flexible sheath having an internal lumen, an open distal end and a longitudinal axis;
an ablating element disposed within the sheath and selectively deployable therefrom so as to project from the sheath in a pulmonary vein with a substantially coil-like shape having at least one revolution, wherein the ablating element is positionable in a deployed condition, in a plane that is substantially orthogonal to the longitudinal axis of the sheath; and at least one exposed, conductive region disposed on at least a portion of the ablating element;
(b) the ablating element being distally advancable out of the sheath to allow the ablating element to form a substantially coil-like shape having at least one revolution;
(c) the ablating element having a conductive region sized for contact along a selected circumferential region of body tissue at the pulmonary vein; and wherein (d) the catheter is operable to transmit ablating energy to the ablating element while contacting the selected region of body tissue to form a circumferential lesion blocking arythmia signals originating in the pulmonary vein.
(a) the catheter comprising:
an elongate, flexible sheath having an internal lumen, an open distal end and a longitudinal axis;
an ablating element disposed within the sheath and selectively deployable therefrom so as to project from the sheath in a pulmonary vein with a substantially coil-like shape having at least one revolution, wherein the ablating element is positionable in a deployed condition, in a plane that is substantially orthogonal to the longitudinal axis of the sheath; and at least one exposed, conductive region disposed on at least a portion of the ablating element;
(b) the ablating element being distally advancable out of the sheath to allow the ablating element to form a substantially coil-like shape having at least one revolution;
(c) the ablating element having a conductive region sized for contact along a selected circumferential region of body tissue at the pulmonary vein; and wherein (d) the catheter is operable to transmit ablating energy to the ablating element while contacting the selected region of body tissue to form a circumferential lesion blocking arythmia signals originating in the pulmonary vein.
8. The catheter of claim 7, wherein the selected region of body tissue is located on a posterior wall of the left atrium proximate to a tissue of the pulmonary vein.
9. The catheter of claim 7, wherein the selected region of body tissue is located on an inner wall of a bodily lumen.
10. A catheter for use in ablating a selected region of body tissue, comprising:
(a) an elongate, flexible sheath having an internal lumen, an open distal end and a longitudinal axis;
an ablating element disposed within the sheath and selectively deployable therefrom so as to project from the distal end of the sheath in a pulmonary vein with a substantially coil-like shape with at least one revolution, wherein the ablating element, in a deployed condition, is positionable in a plane that is substantially orthogonal to the longitudinal axis of the sheath; and at least one exposed, conductive region disposed on at least a portion of the ablating element;
(b) wherein advancing the ablating element distally out of the sheath allows the ablating element to form a substantially coil-like shape having at least one revolution;
(c) the conductive region of the ablating element being contactable along a selected portion of body tissue in the region of the pulmonary vein; wherein (d) the transmission of ablating energy to the ablating element while contacting the selected portion of body tissue to form a continuous lesion effective to block arrhythmia signals originating in the pulmonary vein.
(a) an elongate, flexible sheath having an internal lumen, an open distal end and a longitudinal axis;
an ablating element disposed within the sheath and selectively deployable therefrom so as to project from the distal end of the sheath in a pulmonary vein with a substantially coil-like shape with at least one revolution, wherein the ablating element, in a deployed condition, is positionable in a plane that is substantially orthogonal to the longitudinal axis of the sheath; and at least one exposed, conductive region disposed on at least a portion of the ablating element;
(b) wherein advancing the ablating element distally out of the sheath allows the ablating element to form a substantially coil-like shape having at least one revolution;
(c) the conductive region of the ablating element being contactable along a selected portion of body tissue in the region of the pulmonary vein; wherein (d) the transmission of ablating energy to the ablating element while contacting the selected portion of body tissue to form a continuous lesion effective to block arrhythmia signals originating in the pulmonary vein.
11. The catheter of claim 10, wherein the ablating element is in the form of a forward projecting spiral.
12. The catheter of claim 10, wherein during the advancing the diameter of the at least one revolution of the ablating element is controlled by the extent of advancement of the ablating element from the sheath.
13. A catheter for use in ablating a selected region of body tissue, (a) the catheter comprising:
an elongate, flexible sheath having an internal lumen, an open distal end and a longitudinal axis;
an ablating element disposed within the sheath and selectively deployable therefrom so as to project from the sheath in a substantially coil-like shape having at least one revolution, wherein the ablating element, in a deployed condition is oriented in a plane that is substantially orthogonal to the longitudinal axis of the sheath; and at least one exposed, conductive region disposed on at least a portion of the ablating element;
(b) the ablating element being advancable distally out of the sheath to allow the ablating element to form a substantially coil-like shape having at least one revolution and a conductive region which is contactable with a selected region of body tissue; and (c) wherein the catheter is operable to transmit ablating energy to the ablating element while contacting the selected region of body tissue.
an elongate, flexible sheath having an internal lumen, an open distal end and a longitudinal axis;
an ablating element disposed within the sheath and selectively deployable therefrom so as to project from the sheath in a substantially coil-like shape having at least one revolution, wherein the ablating element, in a deployed condition is oriented in a plane that is substantially orthogonal to the longitudinal axis of the sheath; and at least one exposed, conductive region disposed on at least a portion of the ablating element;
(b) the ablating element being advancable distally out of the sheath to allow the ablating element to form a substantially coil-like shape having at least one revolution and a conductive region which is contactable with a selected region of body tissue; and (c) wherein the catheter is operable to transmit ablating energy to the ablating element while contacting the selected region of body tissue.
14. The catheter of claim 13 wherein the selected region of body tissue is located on a posterior wall of the left atrium proximate the os of a pulmonary vein.
15. The catheter of claim 13 wherein the selected region of body tissue is located on an inner wall of a bodily lumen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2638963A CA2638963C (en) | 1999-09-15 | 2000-09-11 | Coiled ablation catheter system |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/396,959 | 1999-09-15 | ||
| US09/396,959 US6607520B2 (en) | 1999-09-15 | 1999-09-15 | Coiled ablation catheter system |
| US09/539,056 US6632223B1 (en) | 2000-03-30 | 2000-03-30 | Pulmonary vein ablation stent and method |
| US09/539,056 | 2000-03-30 | ||
| PCT/US2000/024836 WO2001019270A1 (en) | 1999-09-15 | 2000-09-11 | Coiled ablation catheter system |
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| CA2638963A Division CA2638963C (en) | 1999-09-15 | 2000-09-11 | Coiled ablation catheter system |
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| CA2638963A Expired - Lifetime CA2638963C (en) | 1999-09-15 | 2000-09-11 | Coiled ablation catheter system |
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| US6890329B2 (en) | 1999-06-15 | 2005-05-10 | Cryocath Technologies Inc. | Defined deflection structure |
| EP2572674A3 (en) | 2001-07-06 | 2013-08-07 | Syntach AG | Implantable blood pressure regulator device |
| DE10152066A1 (en) * | 2001-10-25 | 2003-05-08 | Curative Ag | stent |
| US6656175B2 (en) * | 2001-12-11 | 2003-12-02 | Medtronic, Inc. | Method and system for treatment of atrial tachyarrhythmias |
| US6814733B2 (en) | 2002-01-31 | 2004-11-09 | Biosense, Inc. | Radio frequency pulmonary vein isolation |
| DE10218426A1 (en) * | 2002-04-24 | 2003-11-06 | Biotronik Mess & Therapieg | Ablation device for cardiac tissue, in particular for producing linear lesions between two vascular orifices in the heart |
| US20040106952A1 (en) * | 2002-12-03 | 2004-06-03 | Lafontaine Daniel M. | Treating arrhythmias by altering properties of tissue |
| EP1605866B1 (en) * | 2003-03-03 | 2016-07-06 | Syntach AG | Electrical conduction block implant device |
| WO2004078066A2 (en) | 2003-03-03 | 2004-09-16 | Sinus Rhythm Technologies, Inc. | Primary examiner |
| WO2005039689A2 (en) | 2003-10-24 | 2005-05-06 | Sinus Rhythm Technologies, Inc. | Methods and devices for creating cardiac electrical blocks |
| SE526861C2 (en) | 2003-11-17 | 2005-11-15 | Syntach Ag | Tissue lesion creation device and a set of devices for the treatment of cardiac arrhythmia disorders |
| US9398967B2 (en) | 2004-03-02 | 2016-07-26 | Syntach Ag | Electrical conduction block implant device |
| US20050222672A1 (en) * | 2004-04-01 | 2005-10-06 | Cappella, Inc. | Ostial stent |
| US7993334B2 (en) * | 2005-12-29 | 2011-08-09 | Boston Scientific Scimed, Inc. | Low-profile, expanding single needle ablation probe |
| JP5827124B2 (en) * | 2008-10-04 | 2015-12-02 | ボストン サイエンティフィック サイムド，インコーポレイテッドＢｏｓｔｏｎ Ｓｃｉｅｎｔｉｆｉｃ Ｓｃｉｍｅｄ，Ｉｎｃ． | Loop structure that supports diagnostic and / or therapeutic elements in contact with tissue |
| US8712550B2 (en) | 2008-12-30 | 2014-04-29 | Biosense Webster, Inc. | Catheter with multiple electrode assemblies for use at or near tubular regions of the heart |
| EP2395933B1 (en) * | 2009-02-12 | 2016-05-04 | UMC Utrecht Holding B.V. | Ablation catheter for electrically isolating cardiac tissue |
| US20130165921A1 (en) * | 2011-08-24 | 2013-06-27 | Boston Scientific Scimed, Inc. | Device and methods for nerve modulation |
| US9179974B2 (en) | 2013-03-15 | 2015-11-10 | Medtronic Ardian Luxembourg S.A.R.L. | Helical push wire electrode |
| US10610292B2 (en) | 2014-04-25 | 2020-04-07 | Medtronic Ardian Luxembourg S.A.R.L. | Devices, systems, and methods for monitoring and/or controlling deployment of a neuromodulation element within a body lumen and related technology |
| US9468407B2 (en) | 2014-05-30 | 2016-10-18 | Biosense Webster (Israel) Ltd. | Catheter with distal section having side-by-side loops |
| PL3146924T3 (en) | 2015-09-24 | 2023-03-20 | Medinice S.A. | Cryoapplicator for minimally invasive surgical cardiac ablation |
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|---|---|---|---|---|
| US5156151A (en) * | 1991-02-15 | 1992-10-20 | Cardiac Pathways Corporation | Endocardial mapping and ablation system and catheter probe |
| US5476495A (en) * | 1993-03-16 | 1995-12-19 | Ep Technologies, Inc. | Cardiac mapping and ablation systems |
| IL105828A (en) * | 1993-05-28 | 1999-06-20 | Medinol Ltd | Medical stent |
| EP0754075B1 (en) * | 1993-10-14 | 2006-03-15 | Boston Scientific Limited | Electrode elements for forming lesion patterns |
| US5582609A (en) * | 1993-10-14 | 1996-12-10 | Ep Technologies, Inc. | Systems and methods for forming large lesions in body tissue using curvilinear electrode elements |
| US5507743A (en) * | 1993-11-08 | 1996-04-16 | Zomed International | Coiled RF electrode treatment apparatus |
| US5573531A (en) * | 1994-06-20 | 1996-11-12 | Gregory; Kenton W. | Fluid core laser angioscope |
| US5593405A (en) * | 1994-07-16 | 1997-01-14 | Osypka; Peter | Fiber optic endoscope |
| DE4425195C1 (en) * | 1994-07-16 | 1995-11-16 | Osypka Peter | Heart catheter with multiple electrode device |
| US5836940A (en) * | 1994-10-25 | 1998-11-17 | Latis, Inc. | Photoacoustic drug delivery |
| US6012457A (en) * | 1997-07-08 | 2000-01-11 | The Regents Of The University Of California | Device and method for forming a circumferential conduction block in a pulmonary vein |
| EP1027090B1 (en) * | 1997-10-30 | 2001-08-29 | Boston Scientific Limited | Catheter distal assembly with pull wires |
| US6120500A (en) * | 1997-11-12 | 2000-09-19 | Daig Corporation | Rail catheter ablation and mapping system |
-
2000
- 2000-09-11 EP EP00961755A patent/EP1223876A4/en not_active Withdrawn
- 2000-09-11 CA CA002388823A patent/CA2388823C/en not_active Expired - Lifetime
- 2000-09-11 WO PCT/US2000/024836 patent/WO2001019270A1/en not_active Application Discontinuation
- 2000-09-11 WO PCT/US2000/024835 patent/WO2001019269A1/en active Application Filing
- 2000-09-11 JP JP2001522910A patent/JP2003522561A/en active Pending
- 2000-09-11 CA CA2638963A patent/CA2638963C/en not_active Expired - Lifetime
Also Published As
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| CA2638963C (en) | 2012-03-20 |
| EP1223876A4 (en) | 2003-05-02 |
| EP1223876A1 (en) | 2002-07-24 |
| CA2638963A1 (en) | 2001-03-22 |
| WO2001019269A1 (en) | 2001-03-22 |
| CA2388823A1 (en) | 2001-03-22 |
| WO2001019270A1 (en) | 2001-03-22 |
| JP2003522561A (en) | 2003-07-29 |
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