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Dual curve ablation catheter and method

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Publication number
WO1996034646A1
WO1996034646A1 PCT/US1996/005449 US9605449W WO1996034646A1 WO 1996034646 A1 WO1996034646 A1 WO 1996034646A1 US 9605449 W US9605449 W US 9605449W WO 1996034646 A1 WO1996034646 A1 WO 1996034646A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
segment
distal
ablation
catheter
fig
Prior art date
Application number
PCT/US1996/005449
Other languages
French (fr)
Inventor
Francisco G. Cosio
Frank Nguyen
Mark A. Maguire
Original Assignee
Medtronic Cardiorhythm
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133Tip steering devices
    • A61M25/0141Tip steering devices having flexible regions as a result of using materials with different mechanical properties
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133Tip steering devices
    • A61M25/0144Tip steering devices having flexible regions as a result of inner reinforcement means, e.g. struts or rods
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133Tip steering devices
    • A61M25/0147Tip steering devices with movable mechanical means, e.g. pull wires
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12Surgical 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
    • A61B18/14Probes or electrodes therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/0091Handpieces of the surgical instrument or device
    • A61B2018/00916Handpieces of the surgical instrument or device with means for switching or controlling the main function of the instrument or device
    • A61B2018/0094Types of switches or controllers
    • A61B2018/00946Types of switches or controllers slidable
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/0091Handpieces of the surgical instrument or device
    • A61B2018/00916Handpieces of the surgical instrument or device with means for switching or controlling the main function of the instrument or device
    • A61B2018/0094Types of switches or controllers
    • A61B2018/00952Types of switches or controllers rotatable
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133Tip steering devices
    • A61M25/0147Tip steering devices with movable mechanical means, e.g. pull wires
    • A61M2025/015Details of the distal fixation of the movable mechanical means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133Tip steering devices
    • A61M2025/0161Tip steering devices wherein the distal tips have two or more deflection regions
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0043Catheters; Hollow probes characterised by structural features
    • A61M25/0054Catheters; Hollow probes characterised by structural features with regions for increasing flexibility

Abstract

A dual curve ablation catheter (2), especially suited for treating atrial flutter, includes a shaft (4) with a deflectable tip (20) at the distal end (6) and a handle (10) at the proximal end (8). The tip includes a highly flexible distal segment (30), a relatively stiff intermediate segment (28) and a flexible proximal segment (26) so that pulling on a manipulator wire (16) attached to the distal segment causes the distal segment to curve and engage, for example, an isthmus of tissue (106) adjacent the tricuspid valve (104) and the inferior vena cava (98) and causes the proximal segment to curve and press against the wall (110) of the inferior vena cava so as to stabilize the catheter. Ablation energy can be supplied through the ablation electrodes (48, 68) simultaneously or one at a time to ablate tissue at the isthmus without the need for moving the catheter.

Description

DUALCURVEABLATIONCATHETERANDMETHOD

BACKGROUND OF THE INVENTION It has long been known that the action of the heart depends upon electrical signals carried along the surface of the heart tissue. Sometimes these electrical signals become faulty. It has been found that ablating (burning) these cardiac conduction pathways in the region of the problem destroys the tissue to eliminate the faulty signal. Electrophysiology (EP) catheters are catheters having one or more electrodes at their tips and are used for both diagnosis and therapy. The electrodes at their tips of EP catheters allow the physician to measure electrical signals along the surface of the heart (called mapping) and then, when necessary, ablate certain tissue using, typically, radio frequency (RF) energy directed to one or more high energy capable ablation electrodes.

SUMMARY OF THE INVENTION The present invention is directed to an EP ablation catheter especially suited for treating atrial flutter. Atrial flutter is a common rhythm disturbance defined as an atrial tachycardia with atrial rates exceeding 240 beats per minute. The invention creates a linear lesion oriented perpendicularly to the isthmus of tissue between the inferior aspect of the tricuspid valve and the inferior vena cava. The invention ablates a line of tissue across the critical isthmus using ablation-capable electrodes positioned along the tip of the catheter. The catheter is designed to remain in place and provide firm electrode contact during the ablation despite respiratory, cardiac or blood motion during the ablation.

The atrial flutter ablation catheter includes a shaft having proximal and distal ends with a deflectable tip at the distal end and a handle at the proximal end. The tip includes a highly flexible distal segment, a relatively stiff intermediate segment and a flexible proximal segment. Pulling on a manipulator wire, passing through a lumen in the shaft and attached to the distal end the shaft, causes the distal and proximal segments of the tip to curve. When properly positioned for treating atrial flutter, the distal segment engages the isthmus of tissue to be ablated, which lies adjacent the tricuspid valve and the inferior vena cava opening into the right atrium, and the proximal curve segment presses against the wall of the inferior vena cava so to stabilize the catheter. Ablation energy is supplied through the ablation electrodes, preferably one at a time, to ablate the tissue at the isthmus without the need for moving the catheter once in position. A rotatable core wire, passing the central lumen and secured to the tip of the shaft, may be used to permit a torquing force to be applied to the distal end of the shaft without rotating the entire catheter. The temperature of the ablation electrodes is preferably monitored, such as using thermocouple wires, to permit enhanced control over the ablation temperatures.

One of the advantages of the invention is that it uses a series of ablation electrodes instead of one long electrode to ablate the cardiac tissue. Making the ablation electrodes electrically isolated from one another and allowing them to be individually powered permits a lower power ablation energy source to be used than would be required if the multiple ablation electrodes were replaced by one long electrode or if the multiple ablation electrodes were all powered simultaneously. Also, multiple electrodes allows bipolar recording to be conducted. Of course, if a power source has sufficient capacity to power more than one ablation electrode, this can be done also.

Other features and advantages of the invention will appear from the following description in which the preferred embodiment has been discussed in detail in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall view of an atrial flutter ablation catheter made according to the invention; Fig. 1 A illustrates the tip of the catheter of Fig. 1 in which the proximal segment has a radius of curvature smaller than that of Fig. 1 ;

Fig. 2 is a simplified view showing placement of the tip of the catheter of Fig. 1 within the inferior vena cava, right atrium and against the isthmus adjacent the tricuspid valve; Figs. 3 A and 3B are enlarged cross-sectional views of the tip of the catheter of Fig.

1 omitting the electrical conductor and thermocouple wires passing through the central lumen of the body of the catheter shaft;

Fig. 3C is an enlarged side view of a segment of the catheter shaft of Fig. 1; Figs. 3D-3F are cross-sectional views taken along lines 3D-3D through 3F-3F in Fig. 3A;

Figs. 3G and 3H are cross-sectional views taken along lines 3G-3G and 3H-3H in Fig. 3B; Fig. 31 is a cross-sectional view taken along line 31-31 in Fig. 3C; Fig. 4 is a side view showing the tapered nature of the core wire; Fig. 5 shows a core wire of Fig. 4 with a hypotube, shown in Fig. 7, .and a polyimide tube shown in Fig. 6, strategically positioned along the length of the core wire to provide a very flexible distal segment, a moderately flexible proximal segment and a relatively stiff intermediate segment for the deflectable tip of the catheter of Fig. 1;

Figs. 6 and 7 are cross-sectional views of the polyimide tube and hypotube shown in Fig. 5;

Fig. 8 is an enlarged view of the distal segment of the tip of the catheter of Fig. 1; Figs. 8A-8E are views similar to Fig. 8 of alternative embodiments of the distal segment of the tip of the catheter of Fig. 1;

Fig. 9 shows the distal portion of the assembly of Fig. 5 illustrating the positions of the proximal and distal curves relative to the positions of the various tubes mounted over the core wire; and Fig. 10 is a schematic illustration showing the interconnections among the catheter of Fig. 1, a switchbox, an R.F. generator and an indifferent electrode.

DESCRIPTION OF THE PREFERRED EMBODIMENT Fig. 1 illustrates an anatomically-conforming dual curve ablation catheter, in particular an atrial flutter ablation catheter 2, including a catheter shaft 4 having a distal end 6 and a proximal end 8. Proximal end 8 is mounted to a handle 10 having an axially slidable manipulator ring 12 and a rotatable lateral deflection ring 14 operably connected to a manipulator wire 16 and a core wire 18, respectively, shown in Figs. 3 A and 3D. Sliding manipulator ring 12 causes a deflectable tip 20 of catheter shaft 4 to deflect as shown in Figs. 1 .and 2 while rotating ring 14 causes lateral deflection of tip 20 through the torquing action of core wire 18.

Handle 10 also includes an electrical connector 21 connected to electrical conductors 22, 23 and thermocouple wires 24, 25. Handle 10 may be of a conventional design, or as shown in U.S. Patent No. 5,318,525 or in application number 08/343,310 filed November 22, 1994, the disclosures of which are incorporated by reference. Deflectable tip 20 includes three segments, a proximal segment 26, an intermediate segment 28 and a distal segment 30. The construction of distal segment 30 can be seen best with reference to Figs. 1, 3A-3F, 4, 5 .and 9. Shaft 4 at tip 20 is seen to include a 5- lumen shaft body 32 made of Pebax®, a polyamide polyether block copolymer made by Elf Atochem, Inc. of Philadelphia, Pennsylvania. To impart more flexibility to this section, the Pebax® material is a relatively lower durometer material, such as 30-40D. Body 32 includes a central lumen 34 and four satellite lumens 36 extending .along the length of body 32. A part of central lumen 34 is occupied by a tubular layer 38 made of polyimide tubing. Core wire 18 fits loosely within central lumen 34 while electrical conductor 22 and thermocouple wires 24 pass through two different satellite lumens 36. The other electrical conductor 23 and thermocouple wires 25 passes through central lumen 34. The portion of shaft 4 proximal of deflectable tip 20, see Figs. 3C and 31, is relatively stiff to permit controlled placement of tip 20 at the target site as discussed below. Such proximal portion of the shaft 4 includes an outer jacket 39, preferably made of higher durometer Pebax®, such as 55-65D, reinforced by braided wires 41. A polyimide our ultem tubular layer 38a is positioned within the central lumen 34a and houses core wire 18, electrical connectors 22, 23, thermocouple wires 24,25 and manipulator wire 16.

If desired, one or more axially slidable core wires could be used with the distal ends of the core wires positionable at different axial positions along tip 20; doing so would permit the size of the curves of tip 20 to be ch-anged. Fig. 1A illustrates the result of using such a slidable core wire. Tip 20a has a curve at proximal segment 26 with a larger radius than that if Fig 1 ; the curves at distal segments 30 are the same for both figures. An example of a catheter with a variable curve tip is described in U.S. Patent Application No. 08/343,310 for Steerable Electrophysiology Catheter, the disclosure of which is incorporated by reference. The distal end 42 of shaft body 32, see Fig. 3 A, lies adjacent an insulator 44 made of PEEK (poly-ether-ether-keytone) or other h-ard, temperature-resistant material. Insulator 44 is bonded to distal end 42 of shaft body 32 by heat fusing and adhesive.

Insulator 44 has five bores or lumens which generally align with the corresponding lumens formed in shaft body 32. A cylindrical ablation electrode 48 is secured to and extends between insulator 44 and a second insulator 50. A tip electrode 68 is secured to the distal end of insulator 50. The connections between electrodes 48, 68 and insulators 44, 50 are preferably through both a snap fit and the use of adhesives or other bonding techniques. Tubular layer 38 terminates at a central bore in insulator 50 and is affixed thereto by adhesive.

Manipulator wire 16 has a ball 70 at its distal end to prevent manipulator wire 16 from being pulled back through one of the bores 72 formed in insulator 44. As seen in Fig. 3D, insulator 50 has four axial bores housing core wire 18, thermocouple wires 24, electrical conductor 22 and the distal end 76 of core wire 18.

It should be noted that in Figs. 3A and 3B electrical conductor 23 and thermocouple wires 25 are not shown. High power electrical conductors 22, 23 are connected to ablation electrodes 48, 68 in conventional manners, such as soldering or welding. Pairs of thermocouple wires 24, 25 are respectively positioned adjacent ablation electrodes 68, 48 so to permit the temperatures of the ablation electrodes to be monitored. The hollow interior 78 of tip electrode 68 is filled with a thermally conducting but electrically insulating material, such as cyanoacrylate adhesive, so that thermocouple wires 24 positioned within interior 78 will be provided an accurate reading of the temperature of tip electrode 68, without electrical continuity between the two. As shown in Fig. 3E, thermocouple wires 25 and conductor 22 are positioned adjacent electrode 48 by elastically insulating materials 79, 81.

Of the proximal, intermediate and distal segments 26, 28, 30, intermediate segment is the stiffest and distal segment 30 is the least stiff while proximal segment 26 has a stiffness somewhat between the two stiffnesses of segments 28, 30. To provide shaft 4 with these three different stiffness for tip 20, core wire 18 is modified to provide these stiffnesses. Core wire 18 is, in one preferred embodiment, about 60 inches (152 cm) long and has five distinct segments. Proximal segment 80 is about 35-39 inches (89 to 99 cm) long and has a diameter of about .025 inch (.64 mm). A second segment 82 tapers in diameter from .025 inch to .018 inch (.46 mm) over a distance of about 3 inches (7.6 cm).

Third segment 84 is a constant .018 inch diameter over a length of about 12-14 inches (30 to 36 cm). These first three segments 80, 82, 84 are all coated with PTFE to minimize friction within shaft 4. The fourth segment 86 core wire 18 tapers from 0.018 inch to .0085-.0095 inch (.46 mm to .22 to .24 mm) over a length of 1.5-2.5 inches (3.8 to 6.4 cm) while the final 5-inch (13 cm) length of core wire 18 is a constant diameter fifth segment

88, having a diameter of .0085-.0095 inch. Figs. 3B, 3G and 5 illustrate how the different stiffnesses for segments 26, 28 and 30 is achieved. A hypotube 90, made of stainless steel, is shown in cross-section in Fig. 7. Hypotube 90 has an inside diameter of .010-.012 inch (.25 to .30 mm) and an outside diameter of .018-.022 inch (.46 to .56 mm) and is used to cover core wire 18 over intermediate segment 28. Hypotube 90 extends for a distance of about 1.0-2.0 inch (2.5-5 cm) in a proximal direction along core wire 18 to ensure that the portion of tip 20 between sections 26 and 30 is relatively stiff. Polyimide tube 92 with an inside diameter of .0185-.0225 inch (.47 to .57 mm) and an outside diameter of .024-.028 inch (.61 to .71 mm) and a length of 0.25-0.5 inch (6.35 - 12.7 mm) is mounted over hypotube 90 within segment 30. A second polyimide tube 93 with the same I.D. and O.D. as polyimide tube

92 and a length of 1.0-1.5 inch (2.5 - 3.8 cm) fits over the extension of hypotube 90 within segment 26. In the preferred embodiment, distal segment 30 is about 1.0-2.0 inches (2.54- 5.08 cm) long, intermediate segment 28 is about 1.4-2.2 inch (3.5 to 5.5 cm) long and proximal segment 26 is about 0.8-1.6 inches (2.0-4.0 cm) long. Note that hypotube 90 and polyimide tubes 92, 93 are shown only in Figs. 3B, 3G and 5-7 for simplicity of illustration. The maximum angle for the prim.ary curve at proximal segment 26 is about 120° and for the secondary curve at distal segment 30 is about 100°.

Fig. 9 illustrates how the core wire design matches with the curve shape. In addition to a core wire assembly with sections having different stiffnesses, shaft 4 and intermediate and distal segments 28 and 30 are made having different duometer hardnesses of about 65D, 55D and about 30-40D, respectively.

The use of catheter 2 will be described in conjunction with Fig.2. Fig. 2 illustrates, in simplified form, a portion of a heart 94 having a superior vena cava 96 and an inferior vena cava 98 opening into a right atrium 100. Also illustrated is a portion of right ventricle 102 separated from right atrium 100 by a tricuspid valve 104. An isthmus of tissue 106 extends between the inferior aspect of tricuspid valve 104 and inferior vena cava 98 adjacent the opening of the coron.ary sinus 108. Distal segment 30 is sized with an appropriate flexibility so that upon pulling of manipulator wire 16, distal segment 30 assumes the contour generally corresponding to the shape of the coronary tissue at isthmus 106 when oriented perpendicul-ar to the isthmus of tissue 106. Intermediate segment 28 is sufficiently stiff, through the use of both hypotube 90 and polyimide tube 92, so that it remains substantially straight when distal segment 30 is properly flexed. Proximal segment 26 is less stiff than intermediate segment 28 but, in the preferred embodiment, stiffer than distal segment 30 but also has a curve which allows proximal segment 26 of shaft 4 to push against or be braced against the wall 110 of inferior vena cava 98. This stabilizes tip 20 of catheter 2 to help maintain distal segment 30 in the proper position at isthmus of tissue 106.

After any appropriate readings are taken, ablation electrodes 48, 68 are positioned along isthmus of tissue 106. Once in position, electrodes 48, 68 can be coupled to a suitable RF power supply, not shown, through connector 21. One such power supply is shown in U.S. patent application no. 08/179,558, filed January 10, 1994, the disclosure of which is incorporated by reference. Ablation electrodes 48, 68 .are electrically isolated from one another so they can be independently powered from the power supply. This means that the power supply need not be as large as would be required if they were electrically connected to one another or if the separate ablation electrodes were replaced by a single, extra-long ablation electrode. This eliminates the need to move the ablation electrode after each application of power, the "burn-drag-burn" technique used with conventional ablation catheters. Ablation electrodes 48, 68 are powered one-at-a-time.

Typically, a switchbox 130 is connected between the ablation catheter 2 and an RF generator 132. See Fig. 10. Switchbox 130, which can also be connected to an indifferent electrode 134, allows RF current to be directed to any available ablation electrodes. Thermocouple signals from the particular electrode, used for temperature control, are also supplied to switchbox 130. More than one ablation electrode and thermocouple can be connected simultaneously using switchbox 130. Switchbox 130 can also be automatically controlled.

Figs. 8-8E illustrate various configurations of ablation-capable and mapping electrodes which can be used. Fig. 8 shows ablation-capable electrodes 48, 68, each 4 mm long and having an outside diameter of .091 inch (2.3 mm), for catheter 2 of Figs. 1-7. Distal segment 30a of the embodiment of Fig. 8A is like distal segment 30 of Fig. 8 but has two mapping band electrodes 120. Fig. 8B shows a distal segment 30b with two ablation-capable band electrodes 48 and a half-size (2 mm long) mapping tip electrode 122. Distal segment 30c of Fig. 8C adds two band mapping electrodes 120 to the embodiment of Fig. 8B. The embodiment of Fig. 8D shows the use of a spiral-wound or coiled ablation-capable electrode 124 adjacent to a mapping tip electrode while the Fig. 8E

BSTIT E SHEIΞ embodiment adds a pair of mapping band electrodes 120 to the Fig. 8D embodiment. Other electrode arrangements are also possible.

Modification and variation can be made to the disclosed embodiment without departing from the subject of the invention as defined in the following claims. For example, materials, diameters and lengths can be changed to suit the particular needs or desires of the user. The attachment and bonding techniques discussed above are merely exemplary; other chemical, mechanical and/or thermal bonding techniques can be used as well. In some cases it may be desired to apply energy to more than one ablation electrode at the same time; for example, four ablation electrodes could be used and powered two-at- a-time. The portion of distal segment 30 carrying ablation-capable electrodes 48 could be made to be curved or curvable if desired. While the invention has its greatest utility as an atrial flutter ablation catheter, it may also find use in ablating tissue at the mitral valve, in addition to tricuspid valve 104, and accessory pathways in the postero-lateral right ventricle. Other curve sizes and spacings for this dual curve catheter could also make it suitable for mapping and ablating other areas of the heart.

Claims

AMENDED CLAIMS
[received by the International Bureau on 12 September 1996 ( 12.09.96 ) : original claims 1 -42 replaced by amended claims 1 -19 (2 pages ) ]
1. An anatomically-conforming dual curve ablation catheter comprising: a shaft having proximal and distal ends with a deflectable tip at the distal end; said tip including a curved distal segment, an intermediate segment and a curved proximal segment spaced apart from the distal segment by the intermediate segment; at least one ablation-capable electrode positioned along at least the distal segment of the deflectable tip; a handle at the proximal end of the shaft; an ablation energy conductor extending along the shaft between each of said at least one ablation-capable electrode and the handle; and the distal segment having a first chosen shape to be conformingly engageable with the isthmus of tissue adjacent the tricuspid valve and the inferior vena cava opening into the right atrium of a patient's heart and the proximal segment positioned to be pressable against a wall of the inferior vena cava of the patient's heart to stabilize the catheter while ablation energy is delivered to the isthmus of tissue through the electrodes on the distal sement.
2. The catheter according to claim 1 wherein said electrode is a coil electrode. 3. The catheter according to claim 1 further comprising at least one mapping electrode.
4. The catheter according to claim 3 wherein said mapping electrode is a tip electrode.
5. The catheter according to claim 3 wherein the mapping electrode is positioned proximally of said ablation-capable electrode.
6. The catheter according to claim 1 wherein the shaft is more flexible at said distal end than at said proximal end.
7. The catheter according to claim 1 further comprising means for applying a torquing force to said distal end of the shaft. 8. The catheter according to clώm 7 wherein the torquing force applying means includes a core wire secured to said distal end and extending within a lumen in the shaft between said distal and proximal ends. 17
9. The catheter according to claim 1 further comprising means for changing the shape of at least the proximal curved segment.
10. The catheter according to claim 1 comprising a series of swd ablation-capable electrodes, said electrodes being electrically isolated from one another. 11. The catheter according to claim 10 wherein said electrodes comprise a tip electrode and a circumferential electrode circumscribing the shaft.
12. The catheter according to claim 10 further comprising at least one temperature sensor associated with said electrodes.
13. The catheter according to claim 1 further comprising a plurality of axially spaced-apart mapping electrodes along the distal segment.
14. The catheter -according to claim 1 wherein said ablation electrode is about 5F to 7F in diameter and about 3 to 4 mm long.
15. The catheter according to claim 1 further comprising a temperature sensor associated with said electrode. 16. The catheter according to claim 1 wherein: the distal, proximal and intermediate segments have first, second and third stiffnesses, said third stiffness being substantially greater than the second stiffness and the second stiffness being at le^ as stiff as the first stiffness, and further comprising: a movable tip deflector device mounted to the handle; and an axially movable manipulator wire coupling the distal end to the tip deflector device so that movement of the tip deflector device causes the manipulator wire to pull on said distal end causing said distal and proximal curved segments to bend to said first and second chosen shapes while said intermediate segment is sufficiently stiff so to remain substantially straight. 17. The catheter according to claim 16 wherein the second stifϊhess is greater than the first stiffness,
18. The catheter according to claim 1 wherein each said electrode is connected to a separate one of said ablation energy conductors so that each said electrode can be electrically isolated from all others of said electrodes. 1 . The catheter according to claim 1 wherein said handle includes an electrical connector connected to the ablation energy conductors,
PCT/US1996/005449 1995-05-01 1996-04-19 Dual curve ablation catheter and method WO1996034646A1 (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0839547A1 (en) * 1996-10-28 1998-05-06 C.R. Bard, Inc. Steerable catheter with fixed curve
EP0904795A1 (en) * 1997-09-05 1999-03-31 Cordis Webster, Inc. Thin-walled catheter with high torsional stiffness
GB2347084A (en) * 1999-02-26 2000-08-30 Medtronic Inc Ablation lead with screw tip
WO2003024498A1 (en) * 2001-09-19 2003-03-27 Advanced Cardiovascular Systems, Inc. Catheter with a multilayered shaft section having a polyimide layer
US7670351B2 (en) 2006-05-20 2010-03-02 Darrell Hartwick Medical device using beam construction and methods
US8900219B2 (en) 1999-07-14 2014-12-02 Cardiofocus, Inc. System and method for visualizing tissue during ablation procedures
US9033961B2 (en) 1999-07-14 2015-05-19 Cardiofocus, Inc. Cardiac ablation catheters for forming overlapping lesions
US9056190B2 (en) 2006-06-30 2015-06-16 Abbott Cardiovascular Systems Inc. Balloon catheter tapered shaft having high strength and flexibility and method of making same
US9216274B2 (en) 2007-12-17 2015-12-22 Abbott Cardiovascular Systems Inc. Catheter having transitioning shaft segments
US9381325B2 (en) 2008-11-26 2016-07-05 Abbott Cadiovascular Systems, Inc. Robust catheter tubing
US9669196B2 (en) 2008-11-26 2017-06-06 Abbott Cardiovascular Systems, Inc. Robust multi-layer balloon
US9707380B2 (en) 2012-07-05 2017-07-18 Abbott Cardiovascular Systems Inc. Catheter with a dual lumen monolithic shaft
US9861437B2 (en) 1999-07-14 2018-01-09 Cardiofocus, Inc. Guided cardiac ablation catheters

Families Citing this family (163)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6620155B2 (en) 1996-07-16 2003-09-16 Arthrocare Corp. System and methods for electrosurgical tissue contraction within the spine
US6237605B1 (en) 1996-10-22 2001-05-29 Epicor, Inc. Methods of epicardial ablation
US6161543A (en) 1993-02-22 2000-12-19 Epicor, Inc. Methods of epicardial ablation for creating a lesion around the pulmonary veins
US6805128B1 (en) 1996-10-22 2004-10-19 Epicor Medical, Inc. Apparatus and method for ablating tissue
US6719755B2 (en) 1996-10-22 2004-04-13 Epicor Medical, Inc. Methods and devices for ablation
US6840936B2 (en) * 1996-10-22 2005-01-11 Epicor Medical, Inc. Methods and devices for ablation
US7052493B2 (en) 1996-10-22 2006-05-30 Epicor Medical, Inc. Methods and devices for ablation
US8709007B2 (en) 1997-10-15 2014-04-29 St. Jude Medical, Atrial Fibrillation Division, Inc. Devices and methods for ablating cardiac tissue
US6311692B1 (en) 1996-10-22 2001-11-06 Epicor, Inc. Apparatus and method for diagnosis and therapy of electrophysiological disease
US7070596B1 (en) * 2000-08-09 2006-07-04 Arthrocare Corporation Electrosurgical apparatus having a curved distal section
US5897553A (en) 1995-11-02 1999-04-27 Medtronic, Inc. Ball point fluid-assisted electrocautery device
DE29519651U1 (en) * 1995-12-14 1996-02-01 Muntermann Axel Apparatus for linear endomyocardial catheter ablation tissue radiofrequency
US7794456B2 (en) 2003-05-13 2010-09-14 Arthrocare Corporation Systems and methods for electrosurgical intervertebral disc replacement
WO2001005306A1 (en) * 1999-07-19 2001-01-25 Epicor, Inc. Apparatus and method for ablating tissue
US8308719B2 (en) 1998-09-21 2012-11-13 St. Jude Medical, Atrial Fibrillation Division, Inc. Apparatus and method for ablating tissue
US6120520A (en) 1997-05-27 2000-09-19 Angiotrax, Inc. Apparatus and methods for stimulating revascularization and/or tissue growth
US6102926A (en) 1996-12-02 2000-08-15 Angiotrax, Inc. Apparatus for percutaneously performing myocardial revascularization having means for sensing tissue parameters and methods of use
US6051008A (en) 1996-12-02 2000-04-18 Angiotrax, Inc. Apparatus having stabilization members for percutaneously performing surgery and methods of use
US6246913B1 (en) * 1997-02-14 2001-06-12 Oractec Interventions, Inc. Method and apparatus for the treatment of strabismus
US6226554B1 (en) * 1997-06-02 2001-05-01 Hosheng Tu Catheter system having a ball electrode and methods thereof
US6096037A (en) 1997-07-29 2000-08-01 Medtronic, Inc. Tissue sealing electrosurgery device and methods of sealing tissue
US6527767B2 (en) * 1998-05-20 2003-03-04 New England Medical Center Cardiac ablation system and method for treatment of cardiac arrhythmias and transmyocardial revascularization
US6706039B2 (en) 1998-07-07 2004-03-16 Medtronic, Inc. Method and apparatus for creating a bi-polar virtual electrode used for the ablation of tissue
US6537248B2 (en) 1998-07-07 2003-03-25 Medtronic, Inc. Helical needle apparatus for creating a virtual electrode used for the ablation of tissue
US6409722B1 (en) 1998-07-07 2002-06-25 Medtronic, Inc. Apparatus and method for creating, maintaining, and controlling a virtual electrode used for the ablation of tissue
US6212434B1 (en) 1998-07-22 2001-04-03 Cardiac Pacemakers, Inc. Single pass lead system
US6463334B1 (en) * 1998-11-02 2002-10-08 Cardiac Pacemakers, Inc. Extendable and retractable lead
US6572611B1 (en) * 1998-11-23 2003-06-03 C. R. Bard, Inc. Intracardiac grasp catheter
US6638278B2 (en) * 1998-11-23 2003-10-28 C. R. Bard, Inc. Intracardiac grasp catheter
US6319250B1 (en) * 1998-11-23 2001-11-20 C.R. Bard, Inc Tricuspid annular grasp catheter
US6577902B1 (en) * 1999-04-16 2003-06-10 Tony R. Brown Device for shaping infarcted heart tissue and method of using the device
US8285393B2 (en) * 1999-04-16 2012-10-09 Laufer Michael D Device for shaping infarcted heart tissue and method of using the device
US6332881B1 (en) 1999-09-01 2001-12-25 Cardima, Inc. Surgical ablation tool
US20030208250A1 (en) * 1999-12-15 2003-11-06 Edwards Stuart Denzil Treatment of eustachian tube dysfunction by application of radiofrequency energy
US6501990B1 (en) 1999-12-23 2002-12-31 Cardiac Pacemakers, Inc. Extendable and retractable lead having a snap-fit terminal connector
US7706882B2 (en) 2000-01-19 2010-04-27 Medtronic, Inc. Methods of using high intensity focused ultrasound to form an ablated tissue area
US8221402B2 (en) 2000-01-19 2012-07-17 Medtronic, Inc. Method for guiding a medical device
US8048070B2 (en) 2000-03-06 2011-11-01 Salient Surgical Technologies, Inc. Fluid-assisted medical devices, systems and methods
EP1435867B1 (en) 2001-09-05 2010-11-17 Salient Surgical Technologies, Inc. Fluid-assisted medical devices and systems
US6638268B2 (en) 2000-04-07 2003-10-28 Imran K. Niazi Catheter to cannulate the coronary sinus
US6514250B1 (en) * 2000-04-27 2003-02-04 Medtronic, Inc. Suction stabilized epicardial ablation devices
DE60111517T2 (en) 2000-04-27 2006-05-11 Medtronic, Inc., Minneapolis Vibration-sensitive ablation
US6558382B2 (en) * 2000-04-27 2003-05-06 Medtronic, Inc. Suction stabilized epicardial ablation devices
EP1301228B1 (en) 2000-07-13 2008-07-23 Abbott Cardiovascular Systems Inc. Deployment system for myocardial cellular material
US8308708B2 (en) 2003-07-15 2012-11-13 Abbott Cardiovascular Systems Inc. Deployment system for myocardial cellular material
US6746446B1 (en) 2000-08-04 2004-06-08 Cardima, Inc. Electrophysiological device for the isthmus
US6726700B1 (en) 2000-08-21 2004-04-27 Counter Clockwise, Inc. Manipulatable delivery catheter for occlusive devices
US6482221B1 (en) * 2000-08-21 2002-11-19 Counter Clockwise, Inc. Manipulatable delivery catheter for occlusive devices (II)
US6926669B1 (en) * 2000-10-10 2005-08-09 Medtronic, Inc. Heart wall ablation/mapping catheter and method
US7740623B2 (en) 2001-01-13 2010-06-22 Medtronic, Inc. Devices and methods for interstitial injection of biologic agents into tissue
US6740040B1 (en) * 2001-01-30 2004-05-25 Advanced Cardiovascular Systems, Inc. Ultrasound energy driven intraventricular catheter to treat ischemia
US6807968B2 (en) 2001-04-26 2004-10-26 Medtronic, Inc. Method and system for treatment of atrial tachyarrhythmias
US6663627B2 (en) 2001-04-26 2003-12-16 Medtronic, Inc. Ablation system and method of use
US6699240B2 (en) 2001-04-26 2004-03-02 Medtronic, Inc. Method and apparatus for tissue ablation
US7959626B2 (en) 2001-04-26 2011-06-14 Medtronic, Inc. Transmural ablation systems and methods
US6979342B2 (en) * 2001-09-19 2005-12-27 Advanced Cardiovascular Systems, Incc Catheter with a polyimide distal tip
US7967816B2 (en) 2002-01-25 2011-06-28 Medtronic, Inc. Fluid-assisted electrosurgical instrument with shapeable electrode
US8774913B2 (en) 2002-04-08 2014-07-08 Medtronic Ardian Luxembourg S.A.R.L. Methods and apparatus for intravasculary-induced neuromodulation
US7653438B2 (en) 2002-04-08 2010-01-26 Ardian, Inc. Methods and apparatus for renal neuromodulation
US8150519B2 (en) 2002-04-08 2012-04-03 Ardian, Inc. Methods and apparatus for bilateral renal neuromodulation
US7294143B2 (en) 2002-05-16 2007-11-13 Medtronic, Inc. Device and method for ablation of cardiac tissue
US7118566B2 (en) 2002-05-16 2006-10-10 Medtronic, Inc. Device and method for needle-less interstitial injection of fluid for ablation of cardiac tissue
US7033345B2 (en) * 2002-05-21 2006-04-25 Advanced Cardiovascular Systems, Inc. Deflectable microimplant delivery system
US20160278791A1 (en) 2008-09-26 2016-09-29 Relievant Medsystems, Inc. Intraosseous nerve modulation methods
US20050033137A1 (en) * 2002-10-25 2005-02-10 The Regents Of The University Of Michigan Ablation catheters and methods for their use
US20040082947A1 (en) 2002-10-25 2004-04-29 The Regents Of The University Of Michigan Ablation catheters
US7083620B2 (en) 2002-10-30 2006-08-01 Medtronic, Inc. Electrosurgical hemostat
US20040138621A1 (en) 2003-01-14 2004-07-15 Jahns Scott E. Devices and methods for interstitial injection of biologic agents into tissue
US7819866B2 (en) 2003-01-21 2010-10-26 St. Jude Medical, Atrial Fibrillation Division, Inc. Ablation catheter and electrode
US7497857B2 (en) 2003-04-29 2009-03-03 Medtronic, Inc. Endocardial dispersive electrode for use with a monopolar RF ablation pen
US7101362B2 (en) * 2003-07-02 2006-09-05 St. Jude Medical, Atrial Fibrillation Division, Inc. Steerable and shapable catheter employing fluid force
WO2005039390A3 (en) 2003-10-20 2006-05-11 Arthrocare Corp Electrosurgical method and apparatus for removing tissue within a bone body
US7245973B2 (en) 2003-12-23 2007-07-17 Cardiac Pacemakers, Inc. His bundle mapping, pacing, and injection lead
US8333764B2 (en) 2004-05-12 2012-12-18 Medtronic, Inc. Device and method for determining tissue thickness and creating cardiac ablation lesions
WO2005112812A1 (en) 2004-05-14 2005-12-01 Medtronic, Inc. Method and devices for treating atrial fibrillation by mass ablation
US8007462B2 (en) * 2004-05-17 2011-08-30 C. R. Bard, Inc. Articulated catheter
US7250049B2 (en) * 2004-05-27 2007-07-31 St. Jude Medical, Atrial Fibrillation Division, Inc. Ablation catheter with suspension system incorporating rigid and flexible components
US7122034B2 (en) * 2004-05-27 2006-10-17 St. Jude Medical, Atrial Fibrillation Division, Inc. Curved ablation catheter
US20050273096A1 (en) * 2004-05-27 2005-12-08 Roop John A Anchoring introducer sheath with distal slots for catheter delivery and translation
EP1761188B1 (en) 2004-06-02 2011-07-20 Medtronic, Inc. Clamping ablation tool
WO2005120376A9 (en) 2004-06-02 2006-06-29 Medtronic Inc Ablation device with jaws
EP1750606B1 (en) 2004-06-02 2010-05-05 Medtronic, Inc. Compound bipolar ablation device
EP1750607A2 (en) 2004-06-02 2007-02-14 Medtronic, Inc. Loop ablation apparatus and method
US8663245B2 (en) 2004-06-18 2014-03-04 Medtronic, Inc. Device for occlusion of a left atrial appendage
US8926635B2 (en) 2004-06-18 2015-01-06 Medtronic, Inc. Methods and devices for occlusion of an atrial appendage
US8409219B2 (en) 2004-06-18 2013-04-02 Medtronic, Inc. Method and system for placement of electrical lead inside heart
WO2006002337A3 (en) 2004-06-24 2006-12-21 Arthrocare Corp Electrosurgical device having planar vertical electrode and related methods
US7717875B2 (en) * 2004-07-20 2010-05-18 St. Jude Medical, Atrial Fibrillation Division, Inc. Steerable catheter with hydraulic or pneumatic actuator
US20060089637A1 (en) 2004-10-14 2006-04-27 Werneth Randell L Ablation catheter
US8409191B2 (en) * 2004-11-04 2013-04-02 Boston Scientific Scimed, Inc. Preshaped ablation catheter for ablating pulmonary vein ostia within the heart
US8617152B2 (en) 2004-11-15 2013-12-31 Medtronic Ablation Frontiers Llc Ablation system with feedback
US7468062B2 (en) * 2004-11-24 2008-12-23 Ablation Frontiers, Inc. Atrial ablation catheter adapted for treatment of septal wall arrhythmogenic foci and method of use
US7429261B2 (en) 2004-11-24 2008-09-30 Ablation Frontiers, Inc. Atrial ablation catheter and method of use
US8290586B2 (en) 2004-12-20 2012-10-16 Cardiac Pacemakers, Inc. Methods, devices and systems for single-chamber pacing using a dual-chamber pacing device
US8005544B2 (en) 2004-12-20 2011-08-23 Cardiac Pacemakers, Inc. Endocardial pacing devices and methods useful for resynchronization and defibrillation
US8326423B2 (en) 2004-12-20 2012-12-04 Cardiac Pacemakers, Inc. Devices and methods for steering electrical stimulation in cardiac rhythm management
US8010191B2 (en) 2004-12-20 2011-08-30 Cardiac Pacemakers, Inc. Systems, devices and methods for monitoring efficiency of pacing
US8423139B2 (en) 2004-12-20 2013-04-16 Cardiac Pacemakers, Inc. Methods, devices and systems for cardiac rhythm management using an electrode arrangement
CA2591121A1 (en) 2004-12-20 2006-06-29 Action Medical, Inc. Ventricular pacing
US8010192B2 (en) 2004-12-20 2011-08-30 Cardiac Pacemakers, Inc. Endocardial pacing relating to conduction abnormalities
US8583260B2 (en) 2004-12-28 2013-11-12 St. Jude Medical, Atrial Fibrillation Division, Inc. Long travel steerable catheter actuator
US7691095B2 (en) * 2004-12-28 2010-04-06 St. Jude Medical, Atrial Fibrillation Division, Inc. Bi-directional steerable catheter control handle
US8273285B2 (en) 2005-01-10 2012-09-25 St. Jude Medical, Atrial Fibrillation Division, Inc. Steerable catheter and methods of making the same
US20070156210A1 (en) * 2005-01-14 2007-07-05 Co-Repair, Inc., A California Corporation Method for the treatment of heart tissue
US7455670B2 (en) * 2005-01-14 2008-11-25 Co-Repair, Inc. System and method for the treatment of heart tissue
US7591784B2 (en) * 2005-04-26 2009-09-22 St. Jude Medical, Atrial Fibrillation Division, Inc. Bi-directional handle for a catheter
US9320564B2 (en) * 2005-05-05 2016-04-26 Boston Scientific Scimed Inc. Steerable catheter and method for performing medical procedure adjacent pulmonary vein ostia
US8932208B2 (en) 2005-05-26 2015-01-13 Maquet Cardiovascular Llc Apparatus and methods for performing minimally-invasive surgical procedures
CN101309651B (en) 2005-06-20 2011-12-07 麦德托尼克消融前沿有限公司 Ablation catheter
US7819868B2 (en) 2005-06-21 2010-10-26 St. Jude Medical, Atrial Fibrilation Division, Inc. Ablation catheter with fluid distribution structures
US8777929B2 (en) 2005-06-28 2014-07-15 St. Jude Medical, Atrial Fibrillation Division, Inc. Auto lock for catheter handle
US7465288B2 (en) * 2005-06-28 2008-12-16 St. Jude Medical, Atrial Fibrillation Division, Inc. Actuation handle for a catheter
WO2007008954A3 (en) 2005-07-11 2007-05-10 Ablation Frontiers Low power tissue ablation system
US8657814B2 (en) 2005-08-22 2014-02-25 Medtronic Ablation Frontiers Llc User interface for tissue ablation system
US7623899B2 (en) 2005-09-16 2009-11-24 Biosense Webster, Inc. Catheter with flexible pre-shaped tip section
US7879034B2 (en) 2006-03-02 2011-02-01 Arthrocare Corporation Internally located return electrode electrosurgical apparatus, system and method
US20080039746A1 (en) 2006-05-25 2008-02-14 Medtronic, Inc. Methods of using high intensity focused ultrasound to form an ablated tissue area containing a plurality of lesions
US8641704B2 (en) 2007-05-11 2014-02-04 Medtronic Ablation Frontiers Llc Ablation therapy system and method for treating continuous atrial fibrillation
WO2009002239A1 (en) * 2007-06-28 2008-12-31 St. Jude Medical Ab Medical implantable lead and method for manufacturing the same
US20090082756A1 (en) * 2007-09-25 2009-03-26 Vasundhara Vidyarthi Transradial coronary catheter
WO2009086448A1 (en) 2007-12-28 2009-07-09 Salient Surgical Technologies, Inc. Fluid-assisted electrosurgical devices, methods and systems
US8821488B2 (en) 2008-05-13 2014-09-02 Medtronic, Inc. Tissue lesion evaluation
EP2384222A2 (en) 2008-12-19 2011-11-09 Cardiac Pacemakers, Inc. Devices, methods, and systems including cardiac pacing
US8372033B2 (en) 2008-12-31 2013-02-12 St. Jude Medical, Atrial Fibrillation Division, Inc. Catheter having proximal heat sensitive deflection mechanism and related methods of use and manufacturing
US20100168739A1 (en) * 2008-12-31 2010-07-01 Ardian, Inc. Apparatus, systems, and methods for achieving intravascular, thermally-induced renal neuromodulation
US8652129B2 (en) 2008-12-31 2014-02-18 Medtronic Ardian Luxembourg S.A.R.L. Apparatus, systems, and methods for achieving intravascular, thermally-induced renal neuromodulation
US9254168B2 (en) 2009-02-02 2016-02-09 Medtronic Advanced Energy Llc Electro-thermotherapy of tissue using penetrating microelectrode array
JP5592409B2 (en) 2009-02-23 2014-09-17 サリエント・サージカル・テクノロジーズ・インコーポレーテッド Fluid assisted electrosurgical devices and methods of use thereof
US8702703B2 (en) * 2009-05-12 2014-04-22 Medtronic, Inc. Sub-xiphoid ablation clamp and method of sub-xiphoid ablation
WO2011031748A1 (en) 2009-09-08 2011-03-17 Salient Surgical Technologies, Inc. Cartridge assembly for electrosurgical devices, electrosurgical unit and methods of use thereof
US9861438B2 (en) 2009-12-11 2018-01-09 Biosense Webster (Israel), Ltd. Pre-formed curved ablation catheter
WO2011112991A1 (en) 2010-03-11 2011-09-15 Salient Surgical Technologies, Inc. Bipolar electrosurgical cutter with position insensitive return electrode contact
US8906013B2 (en) 2010-04-09 2014-12-09 Endosense Sa Control handle for a contact force ablation catheter
US9795765B2 (en) 2010-04-09 2017-10-24 St. Jude Medical International Holding S.À R.L. Variable stiffness steering mechanism for catheters
US8870863B2 (en) 2010-04-26 2014-10-28 Medtronic Ardian Luxembourg S.A.R.L. Catheter apparatuses, systems, and methods for renal neuromodulation
WO2011139691A1 (en) 2010-04-27 2011-11-10 Cardiac Pacemakers, Inc. His-bundle capture verification and monitoring
US8979838B2 (en) 2010-05-24 2015-03-17 Arthrocare Corporation Symmetric switching electrode method and related system
US20110295249A1 (en) * 2010-05-28 2011-12-01 Salient Surgical Technologies, Inc. Fluid-Assisted Electrosurgical Devices, and Methods of Manufacture Thereof
US9138289B2 (en) 2010-06-28 2015-09-22 Medtronic Advanced Energy Llc Electrode sheath for electrosurgical device
US8920417B2 (en) 2010-06-30 2014-12-30 Medtronic Advanced Energy Llc Electrosurgical devices and methods of use thereof
US8906012B2 (en) 2010-06-30 2014-12-09 Medtronic Advanced Energy Llc Electrosurgical devices with wire electrode
US9084610B2 (en) 2010-10-21 2015-07-21 Medtronic Ardian Luxembourg S.A.R.L. Catheter apparatuses, systems, and methods for renal neuromodulation
WO2012061161A1 (en) 2010-10-25 2012-05-10 Medtronic Ardian Luxembourg S.A.R.L. Catheter apparatuses having multi-electrode arrays for renal neuromodulation and associated systems and methods
US9023040B2 (en) 2010-10-26 2015-05-05 Medtronic Advanced Energy Llc Electrosurgical cutting devices
US8747401B2 (en) 2011-01-20 2014-06-10 Arthrocare Corporation Systems and methods for turbinate reduction
US9168082B2 (en) 2011-02-09 2015-10-27 Arthrocare Corporation Fine dissection electrosurgical device
US9271784B2 (en) 2011-02-09 2016-03-01 Arthrocare Corporation Fine dissection electrosurgical device
US9011428B2 (en) 2011-03-02 2015-04-21 Arthrocare Corporation Electrosurgical device with internal digestor electrode
US9427281B2 (en) 2011-03-11 2016-08-30 Medtronic Advanced Energy Llc Bronchoscope-compatible catheter provided with electrosurgical device
WO2013016275A1 (en) 2011-07-22 2013-01-31 Cook Medical Technologies Llc Irrigation devices adapted to be used with a light source for the identification and treatment of bodily passages
US9788882B2 (en) 2011-09-08 2017-10-17 Arthrocare Corporation Plasma bipolar forceps
US9750565B2 (en) 2011-09-30 2017-09-05 Medtronic Advanced Energy Llc Electrosurgical balloons
US8870864B2 (en) 2011-10-28 2014-10-28 Medtronic Advanced Energy Llc Single instrument electrosurgery apparatus and its method of use
EP3181081A1 (en) 2012-05-11 2017-06-21 Medtronic Ardian Luxembourg S.à.r.l. Multi-electrode catheter assemblies for renal neuromodulation and associated systems
US9775627B2 (en) 2012-11-05 2017-10-03 Relievant Medsystems, Inc. Systems and methods for creating curved paths through bone and modulating nerves within the bone
US9078667B2 (en) 2012-12-11 2015-07-14 St. Jude Medical, Atrial Fibrillation Division, Inc. Catheter having reduced force concentration at tissue contact site
US9254166B2 (en) 2013-01-17 2016-02-09 Arthrocare Corporation Systems and methods for turbinate reduction
US9855404B2 (en) 2013-05-03 2018-01-02 St. Jude Medical International Holding S.À R.L. Dual bend radii steering catheter
US9549748B2 (en) 2013-08-01 2017-01-24 Cook Medical Technologies Llc Methods of locating and treating tissue in a wall defining a bodily passage
US9724151B2 (en) 2013-08-08 2017-08-08 Relievant Medsystems, Inc. Modulating nerves within bone using bone fasteners
US9526522B2 (en) 2013-09-27 2016-12-27 Medtronic, Inc. Interventional medical systems, tools, and assemblies
US9675798B2 (en) 2014-08-26 2017-06-13 Medtronic, Inc. Interventional medical systems, devices, and components thereof
USD753302S1 (en) * 2015-02-11 2016-04-05 Baylis Medical Company Inc. Electrosurgical device with a curve

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991001772A1 (en) * 1989-07-31 1991-02-21 Radi Medical Systems Ab Catheter, manipulator and combination thereof
WO1994009843A1 (en) * 1992-11-02 1994-05-11 Catheter Imaging Systems Catheter having a multiple durometer
WO1994011057A1 (en) * 1992-11-16 1994-05-26 Boaz Avitall Catheter deflection control
EP0600676A2 (en) * 1992-12-01 1994-06-08 Cardiac Pathways Corporation Steerable catheter with adjustable bend location and/or radius and method
WO1994024930A1 (en) * 1993-04-28 1994-11-10 Webster Wilton W Jr Electrophysiology catheter with pre-curved tip
EP0628322A2 (en) * 1993-06-11 1994-12-14 Cordis Europa N.V. Flexible catheter with strip-like electrode
WO1995004556A2 (en) * 1993-07-28 1995-02-16 Active Control Experts, Inc. Remotely steered catheterization device

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602645A (en) * 1982-12-16 1986-07-29 C. R. Bard, Inc. Atrio-ventricular pacing catheter
US4567901A (en) * 1983-12-15 1986-02-04 Cordis Corporation Prebent ventricular/atrial cardiac pacing lead
US4608986A (en) * 1984-10-01 1986-09-02 Cordis Corporation Pacing lead with straight wire conductors
US4909787A (en) * 1986-08-14 1990-03-20 Danforth John W Controllable flexibility catheter with eccentric stiffener
US5299574A (en) * 1986-08-29 1994-04-05 Bower P Jeffery Method and apparatus for selective coronary arteriography
US4784639A (en) * 1987-07-06 1988-11-15 Patel Piyush V Catheter and method of inserting catheter
US5058595A (en) * 1990-01-31 1991-10-22 St. Louis University Judkins-type angiographic catheter with Doppler crystal, and method of use
US5290229A (en) * 1991-07-15 1994-03-01 Paskar Larry D Transformable catheter and method
US5195990A (en) * 1991-09-11 1993-03-23 Novoste Corporation Coronary catheter
US5273535A (en) * 1991-11-08 1993-12-28 Ep Technologies, Inc. Catheter with electrode tip having asymmetric left and right curve configurations
US5190050A (en) * 1991-11-08 1993-03-02 Electro-Catheter Corporation Tip deflectable steerable catheter
US5238005A (en) * 1991-11-18 1993-08-24 Intelliwire, Inc. Steerable catheter guidewire
US5215540A (en) * 1992-01-31 1993-06-01 St. Jude Medical, Inc. Right coronary catheter
US5327905A (en) * 1992-02-14 1994-07-12 Boaz Avitall Biplanar deflectable catheter for arrhythmogenic tissue ablation
US5354297A (en) * 1992-02-14 1994-10-11 Boaz Avitall Biplanar deflectable catheter for arrhythmogenic tissue ablation
EP0634907B1 (en) * 1992-04-10 1997-01-29 Cardiorhythm Intracardiac electrical potential reference catheter
US5318525A (en) * 1992-04-10 1994-06-07 Medtronic Cardiorhythm Steerable electrode catheter
WO1993020768A1 (en) * 1992-04-13 1993-10-28 Ep Technologies, Inc. Steerable microwave antenna systems for cardiac ablation
US5306263A (en) * 1992-05-01 1994-04-26 Jan Voda Catheter
US5203776A (en) * 1992-10-09 1993-04-20 Durfee Paul J Catheter
US5327889A (en) * 1992-12-01 1994-07-12 Cardiac Pathways Corporation Mapping and ablation catheter with individually deployable arms and method
US5487757A (en) * 1993-07-20 1996-01-30 Medtronic Cardiorhythm Multicurve deflectable catheter
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
US5575766A (en) * 1993-11-03 1996-11-19 Daig Corporation Process for the nonsurgical mapping and treatment of atrial arrhythmia using catheters guided by shaped guiding introducers
US5358479A (en) * 1993-12-06 1994-10-25 Electro-Catheter Corporation Multiform twistable tip deflectable catheter
US5673695A (en) * 1995-08-02 1997-10-07 Ep Technologies, Inc. Methods for locating and ablating accessory pathways in the heart
US5823955A (en) * 1995-11-20 1998-10-20 Medtronic Cardiorhythm Atrioventricular valve tissue ablation catheter and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991001772A1 (en) * 1989-07-31 1991-02-21 Radi Medical Systems Ab Catheter, manipulator and combination thereof
WO1994009843A1 (en) * 1992-11-02 1994-05-11 Catheter Imaging Systems Catheter having a multiple durometer
WO1994011057A1 (en) * 1992-11-16 1994-05-26 Boaz Avitall Catheter deflection control
EP0600676A2 (en) * 1992-12-01 1994-06-08 Cardiac Pathways Corporation Steerable catheter with adjustable bend location and/or radius and method
WO1994024930A1 (en) * 1993-04-28 1994-11-10 Webster Wilton W Jr Electrophysiology catheter with pre-curved tip
EP0628322A2 (en) * 1993-06-11 1994-12-14 Cordis Europa N.V. Flexible catheter with strip-like electrode
WO1995004556A2 (en) * 1993-07-28 1995-02-16 Active Control Experts, Inc. Remotely steered catheterization device

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0839547A1 (en) * 1996-10-28 1998-05-06 C.R. Bard, Inc. Steerable catheter with fixed curve
US5931811A (en) * 1996-10-28 1999-08-03 C.R. Bard, Inc. Steerable catheter with fixed curve
EP0904795A1 (en) * 1997-09-05 1999-03-31 Cordis Webster, Inc. Thin-walled catheter with high torsional stiffness
GB2347084A (en) * 1999-02-26 2000-08-30 Medtronic Inc Ablation lead with screw tip
GB2347084B (en) * 1999-02-26 2003-02-12 Medtronic Inc Ablation lead for atrial flutter
US9421066B2 (en) 1999-07-14 2016-08-23 Cardiofocus, Inc. System and method for visualizing tissue during ablation procedures
US8900219B2 (en) 1999-07-14 2014-12-02 Cardiofocus, Inc. System and method for visualizing tissue during ablation procedures
US9033961B2 (en) 1999-07-14 2015-05-19 Cardiofocus, Inc. Cardiac ablation catheters for forming overlapping lesions
US9861437B2 (en) 1999-07-14 2018-01-09 Cardiofocus, Inc. Guided cardiac ablation catheters
WO2003024498A1 (en) * 2001-09-19 2003-03-27 Advanced Cardiovascular Systems, Inc. Catheter with a multilayered shaft section having a polyimide layer
US7556634B2 (en) 2001-09-19 2009-07-07 Advanced Cardiovascular Systems, Inc. Catheter with a multilayered shaft section having a polyimide layer
US6863678B2 (en) 2001-09-19 2005-03-08 Advanced Cardiovascular Systems, Inc. Catheter with a multilayered shaft section having a polyimide layer
US9855400B2 (en) 2001-09-19 2018-01-02 Abbott Cardiovascular Systems, Inc. Catheter with a multilayered shaft section having a polyimide layer
US7670351B2 (en) 2006-05-20 2010-03-02 Darrell Hartwick Medical device using beam construction and methods
US9205223B2 (en) 2006-06-30 2015-12-08 Abbott Cardiovascular Systems Inc Balloon catheter shaft having high strength and flexibility
US9056190B2 (en) 2006-06-30 2015-06-16 Abbott Cardiovascular Systems Inc. Balloon catheter tapered shaft having high strength and flexibility and method of making same
US9468744B2 (en) 2007-12-17 2016-10-18 Abbott Cardiovascular Systems Inc. Catheter having transitioning shaft segments
US9216274B2 (en) 2007-12-17 2015-12-22 Abbott Cardiovascular Systems Inc. Catheter having transitioning shaft segments
US9539368B2 (en) 2008-11-26 2017-01-10 Abbott Cardiovascular Systems, Inc. Robust catheter tubing
US9669196B2 (en) 2008-11-26 2017-06-06 Abbott Cardiovascular Systems, Inc. Robust multi-layer balloon
US9381325B2 (en) 2008-11-26 2016-07-05 Abbott Cadiovascular Systems, Inc. Robust catheter tubing
US9707380B2 (en) 2012-07-05 2017-07-18 Abbott Cardiovascular Systems Inc. Catheter with a dual lumen monolithic shaft

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US6156034A (en) 2000-12-05 grant
US5916214A (en) 1999-06-29 grant

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