US20210220046A1 - Catheter with multifunctional microinjection-molded housing - Google Patents
Catheter with multifunctional microinjection-molded housing Download PDFInfo
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- US20210220046A1 US20210220046A1 US17/222,902 US202117222902A US2021220046A1 US 20210220046 A1 US20210220046 A1 US 20210220046A1 US 202117222902 A US202117222902 A US 202117222902A US 2021220046 A1 US2021220046 A1 US 2021220046A1
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Abstract
An electrophysiology catheter has a distal electrode section having a generally-cylindrical, hollow housing body, a lumen and an opening in a sidewall. A flex circuit has a first portion supported on the outer surface the housing body, and a second portion that extends into the lumen via the opening for connection to cables and/or wires in the lumen. The flex circuit has a first and second magnetic field sensing coil traces generally perpendicular to each other and a magnetic field sensing coil wire generally perpendicular thereto is wound around the housing body to form an x/y/z position sensor. One or more ring electrodes are carried on the housing body, separated by ring spacers. A force sensor is mounted on a distal end of the housing body, with strain gauges electrically connected to the flex circuit. The housing is configured to provide a distal anchor for a puller tensile.
Description
- This application is a continuation of and claims priority to and the benefit of U.S. application Ser. No. 15/925,521 filed Mar. 19, 2018, now U.S. Pat. No. 10,966,783, the entire contents of which are incorporated herein by reference.
- The present invention relates to electrophysiologic (EP) catheters, in particular, EP catheters for ablating cardiac tissue.
- Electrode catheters have been in common use in medical practice for many years. Diagnosis and treatment of cardiac arrythmias by means of electrode catheters include mapping the electrical properties of heart tissue and selectively ablating cardiac tissue by application of energy. Such ablation can cease or modify the propagation of unwanted electrical signals from one portion of the heart to another. The ablation process destroys the unwanted electrical pathways by formation of non-conducting lesions. Various energy delivery modalities have been disclosed for forming lesions, and include use of microwave, laser and more commonly, radiofrequency energies to create conduction blocks along the cardiac tissue wall.
- In a two-step procedure—mapping followed by ablation—electrical activity at locations within the heart is typically sensed and measured by advancing a catheter containing one or more electrical sensors (or electrodes) into the heart, and acquiring data at a multiplicity of locations. These data are then utilized to select the tissue target areas at which ablation is to be performed.
- In use, the electrode catheter is inserted into a major vein or artery, e.g., the femoral artery, and then guided into the chamber of the heart which is of concern. A reference electrode is provided, generally taped to the patient's skin or provided on the ablation catheter or another catheter. Radio frequency (RF) current is applied to the ablation electrode of the catheter, and flows through the surrounding media, i.e., blood and tissue, toward the reference electrode. The distribution of current depends on the amount of electrode surface in contact with the tissue, as compared to blood which has a higher conductivity than the tissue.
- The distal electrode section of conventional irrigated catheters is a location of multiple functions and purposes. The location may include anchors for distal ends of puller wires or tensile members. The location may also house an electromagnetic position sensor. A force sensor may also be included in that location. One or more ring electrodes may also be present at that location. Consequently, the distal electrode section is often cramped with components criss-crossing and overlapping each other, making assembly a challenge and the distal electrode section an area where damage and defects can occur.
- Accordingly, there is a desire for a catheter whose distal electrode section has a more simplified structure and arrangement, with improved integration of multiple different components. There is also a desire to use flex circuits for integration of electrical conductors because flex circuits are more adaptable and reduce clutter and can be electrically connected with the use of electrical traces.
- An electrophysiology catheter has a distal electrode section having a micro injection molded housing component with multiple features to facilitate multiple functions, including puller tensile member anchor, integration of electromagnetic position sensor, connection to force sensor, ring electrode placement and simplified integration of electrical conductors and contacts. The distal electrode section has a more simplified structure and arrangement. Moreover, the distal electrode section includes flex circuits for integration of electrical conductors because flex circuits are more adaptable to space constraints and can eliminate the use of traditional welding process for connecting ring electrodes. Furthermore, flex circuits may be more easily integrated into the distal electrode section with the use of electrical traces which can be applied by deposition methods.
- In some embodiments, an electrophysiology catheter has an elongated catheter body, a deflection section distal of the catheter body, a distal electrode section and a control handle proximal of the catheter body. The distal electrode section includes a housing with a generally-cylindrical, hollow housing body with an outer surface, a lumen and an opening in a sidewall allowing access into the lumen. The distal electrode section also includes a flex circuit having a first portion supported on the outer surface of the housing body and a second portion extending into the lumen via the opening in the housing body.
- In some embodiments, the housing body has a micro-injection molded construction.
- In some embodiments, the flex circuit has a first magnetic field sensing coil trace, and a second magnetic field sensing coil trace generally perpendicular to the first magnetic field sensing coil.
- In some embodiments, the first and second magnetic field sensing coil traces are electrically connected to one or more cables extending through the catheter body and the deflection section.
- In some embodiments, the distal electrode section includes a magnetic field sensing coil wire wound around the housing body, wherein the third magnetic field sensing coil wire is generally perpendicular to the first and second magnetic field sensing coil traces.
- In some embodiments, the outer surface of the housing body has a circumferential recess and the third magnetic field sensing coil wire is situated in the circumferential recess.
- In some embodiments, the distal electrode assembly includes a ring electrode and a ring spacer on the outer surface of the housing body.
- In some embodiments, the housing body has a ridge at its proximal end, and the ring electrode distal of the ridge abuts the ridge, and the ring spacer distal of the ring electrode abuts the ring electrode.
- In some embodiments, the housing body has a ridge at its proximal end, and the ring spacer distal of the ridge abuts the ridge, and the ring electrode distal of the ring space abuts the ring spacer.
- In some embodiments, the distal electrode section further comprises a force sensor mounted on a distal end of the housing body.
- In some embodiment, the force sensor has a plurality of strain gauges electrically connected to the flex circuit.
- In some embodiments, the force sensor has an on-axis stem and an annular ring generally perpendicular to the stem, wherein the strain gauges extend between the stem and the annular ring.
- In some embodiment, the distal electrode section includes a tip electrode distal of the housing body, wherein the tip electrode has a shell portion, a plug portion and an internal chamber configured to receive fluid.
- In some embodiments, the catheter includes a fluid tubing extending through the catheter body and the deflection and further into the distal electrode section, wherein the fluid tubing has a distal end configured to pass fluid into the internal chamber of the tip electrode.
- In some embodiment, the catheter includes a puller tensile member having a U-bend portion anchored in the housing body.
- In some embodiments, the housing body has a through-opening through which the puller tensile member extends.
- In some embodiments, the housing body has two through-openings, each through which a respective portion of the puller tensile member extends.
- In some embodiments, the housing body has a recess in which the U-bend portion of the puller tensile member lies.
- In some embodiments, the recess is arcuate around a distal opening of the lumen of the housing body.
- In some embodiments, the housing body has a step between a distal portion with a smaller outer diameter and a proximal portion with a larger diameter, wherein the first portion of the flex circuit is supported on the distal portion of the housing body.
- In some embodiments, the magnetic sensing coil wire is wound on the proximal portion of the house body.
- These and other features and advantages of the present invention will be better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings. It is understood that selected structures and features have not been shown in certain drawings so as to provide better viewing of the remaining structures and features.
-
FIG. 1 is a perspective view of a catheter of the present invention, in accordance with an embodiment. -
FIG. 2 is an end cross-sectional view of a catheter body of the catheter ofFIG. 1 , taken along line A-A. -
FIG. 3 is an end cross-sectional view of an intermediate deflection section of the catheter ofFIG. 1 , taken along line B-B. -
FIG. 4 is a perspective view of a distal section of the catheter, with parts broken away, in accordance with an embodiment. -
FIG. 5A is a perspective view of a multifunctional microinjection-molded housing of the distal section ofFIG. 4 . -
FIG. 5B is an end cross-sectional view of the housing ofFIG. 5A , taken along line A-A. -
FIG. 6 is a perspective view of the housing ofFIG. 5A , with a force sensor, in accordance with an embodiment. -
FIG. 7 is a perspective view of a flex circuit ofFIG. 6 . -
FIG. 8 is a top view of the flex circuit ofFIG. 7 lying flat. -
FIG. 9 is a top view of a flex circuit lying flat, in accordance with another embodiment. -
FIG. 1 illustrates an embodiment of acatheter 10 having anelongated catheter body 12 with proximal and distal ends, an intermediatedeflectable section 14 at the distal end of thecatheter body 12, and adistal electrode section 15 with atip electrode 17 and a micro-injection molded,multi-functional housing 13. The catheter also includes acontrol handle 16 at the proximal end of thecatheter body 12 for controlling bi-directional deflection of theintermediate section 14 relative to thecatheter body 12. - With reference to
FIG. 2 , thecatheter body 12 comprises an elongated tubular construction having a single, axial orcentral lumen 18. Thecatheter body 12 is flexible, i.e., bendable, but substantially non-compressible along its length. Thecatheter body 12 can be of any suitable construction and made of any suitable material. In some embodiments, thecatheter body 12 comprises anouter wall 20 made of polyurethane or PEBAX with an imbedded braided mesh of stainless steel or the like to increase torsional stiffness of thecatheter body 12 so that, when the control handle 16 is rotated, theintermediate section 14 of thecatheter 10 will rotate in a corresponding manner. - The outer diameter of the
catheter body 12 is not critical. In some embodiments, the outer diameter is about 8 french or 7 french. Likewise the thickness of theouter wall 20 is not critical, but is thin enough so that thecentral lumen 18 can accommodate components, e.g., puller tensile members, lead wires, and any other desired wires, cables or tubings. If desired, the inner surface of theouter wall 20 is lined with a stiffeningtube 22 to provide improved torsional stability. In some embodiments, the catheter has anouter wall 20 with an outer diameter of from about 0.090 inch to about 0.94 inch and an inner diameter of from about 0.061 inch to about 0.065 inch. - The components extending through the
lumen 18 of thecatheter body 12 may includelead wires 23T and 23R (for thetip electrode 17 and one or more ring electrodes 21 proximal of the tip electrode), anirrigation tubing 24 withlumen 25 for delivering fluid to the tip electrode, one or more wire(s) and/or cable(s) (collectively “cables”) 26 for an EM position sensor 27 carried in or near thedistal section 15, one wire(s) and/or more cable(s) (collectively “cables”) 58 for aforce sensor 61 housed in thedistal section 15, and/or pullertensile members intermediate section 14. -
FIG. 3 illustrates an embodiment of theintermediate section 14 which comprises a short section oftubing 19. The illustratedtubing 19 has multiple lumens, for example off-axis lumens axis lumen 35. In some embodiments, thelumen 31 carries thelead wires 23T and 23R, and theposition sensor cables 26, thelumen 32 carries the first pullertensile member 28A, thelumen 33 carries theforce sensor cables 58, thelumen 34 carries the second pullertensile member 28B, and thelumen 35 carries theirrigation tubing 24. It is understood that the lumens may be arranged in different configurations, as needed or appropriate. - The
tubing 19 of theintermediate section 14 is made of a suitable non-toxic material that is more flexible than thecatheter body 12. A suitable material for thetubing 19 is braided polyurethane, i.e., polyurethane with an embedded mesh of braided stainless steel or the like. The size of each lumen is not critical, but is sufficient to house the respective components extending therethrough. - Each puller
tensile member - As shown in
FIG. 2 , the portion of each pullertensile member catheter body 12 passes through arespective compression coil 29 in surrounding relation. Each compression coil extends from the proximal end of thecatheter body 12 to at or near the proximal end of theintermediate section 14. The compression coils are made of any suitable metal, preferably stainless steel, and are tightly wound on themselves to provide flexibility, i.e., bending, but to resist compression. The inner diameter of the compression coil is slightly larger than the diameter of the puller tensile member. As shown inFIG. 3 , each portion of the pullertensile members protective sheath 36 to prevent the puller tensile member from cutting into thetubing 19 of theintermediate section 14 during deflection. - Proximal ends of the puller
tensile members deflection knob 80 of the control handle 16. Suitable deflection members are described in U.S. Pat. No. 7,377,906, titled STEERING MECHANISM FOR BI-DIRECTIONAL CATHETER, the entire disclosure of which is incorporated herein by reference. - With reference to
FIG. 4 , at the distal end of theintermediate section 14 is thedistal electrode section 15 that includes thetip electrode 17, the micro-injection molded,multifunctional housing 13, and aflex circuit 53 supported by thehousing 13. In some embodiments, a relatively short piece of non-conductive, single-lumened connector tubing 37 extends between thehousing 13 and the distal end of thetubing 19, to provide alumen 38 which allows components passing between thelumen 41 of thehousing 13 and the lumens 31-35 of the tubing 19 (seeFIG. 3 ) to reorient, as needed. These components may include, for example, theelectrode lead wires 23T, 23R, theirrigation tubing 24, theforce sensor cables 58, the pullertensile members FIG. 3 ). - As shown in
FIG. 5A andFIG. 5B , the micro-injection molded,multifunctional housing 13 has a generally hollowcylindrical body 39 having alumen 41, a distal portion 39D with an outer diameter DD and aproximal portion 39P with an outer diameter DP, with DD<DP creating a first circumferential step S1 at the junction between theportions 39D and 39P. Thebody 39 also has aradial opening 40 in a sidewall of the distal portion 39D that provides access into thelumen 41. Theopening 40 has aproximal edge 40P that lies along the step S1 and adistal edge 40D that has an arcuate configuration. The outer surface of the distal portion 39D is generally smooth. The outer surface of theproximal portion 39P is generally smooth with the exception of acircumferential recess 42 extending around thebody 39. - At the proximal end, the
body 39 has anannular ridge 43 whose outer diameter DR>DP. Thebody 39 has a short distal end portion orneck 44 whose outer diameter DN<DD creates a second or distal circumferential step S2. - The
lumen 41 extends through the entirety of thebody 39. Thelumen 41 at least at the distal end of thebody 39 is partially occluded by a partialperipheral lip 50 that projects inwardly into the lumen 41 (FIG. 5B ). Thelip 50 includes two axial through-holes lumens multi-lumened tubing 19 of thedeflection section 14. Connecting the through-holes elongated recess 52 on a distal face of thelip 50 that follows the peripheral curvature of thelip 50. In that regard, it is understood that the pullertensile members elongated recess 52 with each leg extending through a respective through-hole portions elongated recess 52 anchors the U-bend portion 28U so that an operator manipulating a deflection knob 11 of the control handle 16 (FIG. 1 ) acting on proximal ends of theportions deflection section 14 bi-directionally. The curvedelongated recess 52 anchors the U-bend portion 28U in a manner that minimizes occlusion or occupation of thelumen 41. - The
lip 50 may be a formation limited to the distal end of thebody 39. In some embodiments, thelip 50 may be a formation that extends along the inner surface surrounding the lumen, as appropriate or desired. In this regard, the through-holes 51A/51B are elongated passages that extend the length of thebody 39. - As shown in
FIG. 6 , aflex circuit 53 is supported by thehousing 13. In some embodiments, the flex circuit has a T-configuration, with a generally rectangulardistal portion 53D and an elongated proximal portion ortail 53P extending at about 90 degrees, as shown inFIG. 7 andFIG. 8 . Thedistal portion 53D has traces X configured as an x-axis coil and traces Y configured as a y-axis coil. Thedistal portion 53D is wrapped around the outer surface of the distal portion 39D such that the coil traces X and Y are generally perpendicular to each other on outer surface of the distal portion 39D. - The proximal portion or
tail 53P advantageously extends into thelumen 41 via theopening 40 in thebody 39. Theproximal portion 53P includes traces Tx, Ty and connection pads 76 that connect to one or more electrical components, including the EMposition sensor cables 26 for passing electrical signals arising in the coil traces X and Y proximally along thedeflection section 14 and thecatheter body 12, toward the control handle 16. A z-axis coil Z includes awire 54 wrapped around thecircumferential recess 42 of the body 39 (seeFIG. 6 ). End portions of thewire 54 extend through one or more through-hole 55 (seeFIG. 5A ) formed in the sidewall of therecess 42 to reach thelumen 41 of thehousing body 39, where the end portions are joined with theflex circuit 53 orEM sensor cable 26. - In some embodiments, the end portions of the
wire 54 are soldered directly to connection pads on theflex circuit 53 without routing them through thelumen 41 of thebody 39. In some embodiments, with reference toFIG. 5A andFIG. 9 , aflex circuit 53 has a distal portion or leg 53L and a longitudinal proximal portion or tail 53T which together form an “L” shape. On the same side as the distal leg 53L and proximal thereof by a separation gap G, theflex circuit 53 includes a generally rectangularproximal portion 53R with acorner 53C that extends from a side edge of the tail 53T. The distal leg 53L is configured to wrap circumferentially around the distal portion 39D of thebody 39, the tail 53T is configured to pass through theopening 40, and theproximal portion 53R is configured to wrap circumferentially around theproximal portion 39P of thebody 39. Theproximal portion 53R of the flex circuit includes the coil traces X and Y, and one or moreelongated connection pads 79 that traverse over the coil traces X and Y and are generally perpendicular to the tail 53T when theproximal portion 53R is wrapped circumferentially around theproximal portion 39 of the body. - In some embodiments, one or more ring electrodes 21 are carried on the
housing 13, as shown inFIG. 4 . In the illustrated embodiment, a first ring electrode 21A having a predetermined width W1 is slipped over the distal end of thehousing 13 and moved proximally onto theproximal portion 39P until the ring electrode abuts tightly with theannular ridge 43 acting as a stop. A first spacer 60A having a predetermined width W2 is then slipped over the distal end of thehousing 13 and moved proximally until it abuts tightly with the first ring electrode 21A. A second ring electrode 21B having a predetermined with W3 is slipped over the distal end of thehousing 13 and moved proximally until it abuts tightly with the first spacer 60A. Asecond spacer 60B having a predetermined width W4 is slipped over the distal end of thehousing 13 and moved proximally until it abuts tightly with the second ring electrode 21B. Accordingly, the ring electrodes 21A, 21B can be advantageously arranged with tight tolerances for improved mapping and/or ablation performance. The lead wires 30R for the ring electrodes 21A, 21B pass through respective through-holes 56 and 57 (seeFIG. 5A ) formed in the sidewall of the housingproximal portion 39P for connection to the respective ring electrodes. - In some embodiments, the ring electrodes are electrically connected to the underlying elongated
circumferential connection pads 79 provided on theproximal portion 53R of the flex circuit 53 (seeFIG. 9 ) that is wrapped around theproximal portion 39P of thebody 39 below the ring electrodes and the spacers. - It is understood that the
housing 13 may be configured with any desired longitudinal length for accommodating a corresponding plurality of ring electrodes, whose predetermined width and spacing between adjacent ring electrodes on the outer surface of thehousing 13 may be varied as desired. - In some embodiments, the
distal section 15 includes aforce sensor 61 having a distal on-axis stem 63 with lumen 67, an annular proximal portion orring 62 perpendicular to thestem 63, and a plurality (e.g., three, although only two are shown inFIG. 4 ) radial strain gauges 72 extending between thestem 63 and theannular ring 62. Thering 62 is configured to fit onto theneck 44 of thehousing 13. In that regard, a proximal end of theneck 44 may have a plurality of fasteners or snaps 64 that engage with the distal edge of thering 62 to secure the force sensor onto thehousing 13. Eachstrain gauge 72 has respectiveelectrical leads 65 andconnection pads 66 that allow electrical signals arising from the strain gauges to pass onto theflex circuit 53 and pass proximally along the catheter through thedeflection section 14 and thecatheter body 12 via thecables 58. - Mounted on an extended
distal end 63D of thestem 63 is thedistal tip electrode 17, as shown inFIG. 4 . Thedistal tip electrode 17 includes ashell portion 71 and a proximal plug portion 73 (shown in broken lines) which seals an open proximal end of the shell portion to create aninterior chamber 70. A distal end of the lead wire 30T (seeFIG. 2 andFIG. 3 , not shown inFIG. 4 ) is potted in a blind hole (not shown) in theplug portion 73 and the lead wire 30T extends through the lumen 67 of thestem 63 of theforce sensor 61. The irrigation tubing 24 (seeFIG. 2 andFIG. 3 , not shown inFIG. 4 ) also extends through the lumen 67 with its distal end extending into theinterior chamber 70 defined by theshell portion 71 of thetip electrode 17. A plurality ofirrigation ports 74 are formed in theshell portion 71 so that fluid delivered by theirrigation tubing 24 into theinterior chamber 70 can exit thedistal tip electrode 17 via theirrigation ports 74. Theplug portion 73 has an axial through-opening that receives the extendeddistal end 63D of theforce sensor 61 and secures theforce sensor 61 relative to theshell portion 71 so that any force exerted on theshell portion 71, for example, when theshell portion 71 contacts tissue surface, is imparted to theplug portion 73 and thestem 63 of theforce sensor 61 in activating the strain gauges 72 to transmit electrical signals to theconnection pads 66 of theflex circuit 53, as shown inFIG. 8 . The extendeddistal end 63D has a smaller outer diameter relative to thestem 63 so to create astop 63 that abuts a proximal face of theplug portion 73 and prevents plugportion 73 from moving proximally and interfering with the action of thestem 63 in responding to a force that is applied to the distal tip electrode.Traces 75 transmit the strain electrical signals to the cables 58 (seeFIG. 2 andFIG. 3 , not shown inFIG. 4 ) via connection pads 78. - In some embodiments, a short nonconductive tubing 95 (see
FIG. 4 ) extends between thetip electrode 17 and thesecond spacer 60B, circumferentially surrounding, protecting and providing a fluid-tight seal around theforce sensor 61. Thetubing 95 is sufficiently flexible so as not to interfere with deformation of the strain gauges 72 of theforce sensor 61 when sensing contact and force of thetip electrode 17 against tissue. - Having a micro-injection-molded body, the
housing 13 performs as a single, unitary body and component providing a multitude of functions, including an distal anchor for the puller tensile member and a support for various components, including, the flex circuit, the force sensor, the x/y/z-axes coils, the ring electrodes and their spacers. Thelumen 41 of thehousing 13 can house additional components, as needed or desired. Thehousing 13 provides cost savings in terms of supply and manufacturing costs. Micro injection molding can allow more intricate and detailed 3-D geometry in thehousing 13. - The preceding description has been presented with reference to presently preferred embodiments of the invention. Workers skilled in the art and technology to which this invention pertains will appreciate that alterations and changes in the described structure may be practiced without meaningfully departing from the principal, spirit and scope of this invention. Notably, the drawings are not necessarily to scale, and any one or more features of any one or more embodiments may be included in any other one or more embodiments in addition to or in lieu of any feature, as desired or appropriate. Accordingly, the foregoing description should not be read as pertaining only to the precise structures described and illustrated in the accompanying drawings, but rather should be read consistent with and as support to the following claims which are to have their fullest and fair scope.
Claims (19)
1. An electrophysiology catheter having:
an elongated catheter body;
a deflection section distal of the catheter body;
a distal electrode section having:
a housing with a generally-cylindrical, hollow housing body with an outer surface, the housing body defining a lumen and an opening in a sidewall allowing access into the lumen, and the housing body comprising:
a distal portion having a distal outer diameter, and a distal end portion having a distal end diameter, and
a proximal portion having a proximal outer diameter,
the distal outer diameter being smaller than the proximal outer diameter such that the housing body has a first step at a junction between the distal portion and the proximal portion, and
the distal end diameter of the distal end portion being smaller than the distal outer diameter of the distal portion such that the housing body has a second step distal of the first step, and
a flex circuit having a first portion supported on the outer surface of the housing body and a second portion extending into the lumen via the opening in the housing body; and
a control handle proximal of the catheter body.
2. The catheter of claim 1 , wherein the flex circuit has a first magnetic field sensing coil trace, and a second magnetic field sensing coil trace generally perpendicular to the first magnetic field sensing coil.
3. The catheter of claim 2 , wherein the first and second magnetic field sensing coil traces are electrically connected to one or more cables extending through the catheter body and the deflection section.
4. The catheter of claim 3 , wherein the distal electrode section includes a magnetic field sensing coil wire wound around the housing body, the third magnetic field sensing coil wire being generally perpendicular to the first and second magnetic field sensing coil traces.
5. The catheter of claim 4 , wherein the outer surface of the housing body has a circumferential recess and the third magnetic field sensing coil wire is situated in the circumferential recess.
6. The catheter of claim 1 , wherein the distal electrode assembly includes a ring electrode and a ring spacer on the outer surface of the housing body.
7. The catheter of claim 6 , wherein the housing body has a ridge at its proximal end, and the ring electrode abuts the ridge, and the ring spacer abuts the ring electrode.
8. The catheter of claim 6 , wherein the housing body has a ridge at its proximal end, and the ring spacer abuts the ridge, and the ring electrode abuts the ring spacer.
9. The catheter of claim 1 , wherein the opening in the housing body comprises a proximal edge that lies along the first step and a distal edge having an arcuate configuration.
10. The catheter of claim 1 , wherein the housing body further comprises an annular ridge at its proximal end, the annular ridge having an outer ridge diameter greater than the proximal outer diameter of the proximal portion of the housing body.
11. The catheter of claim 1 , wherein the lumen is partially occluded at least at its distal end by a partial peripheral lip that projects inwardly into the lumen.
12. The catheter of claim 11 , further comprising a puller member having first and second proximal portions and U-bend portion connecting the first and second proximal portions,
wherein the partial peripheral lip comprises first and second axial through holes connected by a curved elongated recess on a distal face of the lip, the first and second axial through holes configured to receive the first and second portions of the puller member, and the curved elongated recess configured to receive the U-bend portion of the puller member.
13. The catheter of claim 1 , wherein the distal electrode section includes a tip electrode distal of the housing body, the tip electrode having a shell portion, a plug portion and an internal chamber configured to receive fluid.
14. The catheter of claim 13 , wherein the catheter includes a fluid tubing extending through the catheter body and the deflection and into the distal electrode section, the fluid tubing having a distal end configured to pass fluid into the internal chamber of the tip electrode.
15. The catheter of claim 1 , wherein the first portion of the flex circuit is supported on the distal portion of the housing body.
16. The catheter of claim 15 , wherein a magnetic field sensing coil wire is wound on the proximal portion of the housing body.
17. The catheter of claim 1 , wherein the flex circuit has a T-configuration in which the first portion is generally rectangular and wrapped around the outer surface of the distal portion of the housing body, and the second portion is elongated and extends from the first portion into the lumen via the opening in the housing body.
18. The catheter of claim 17 , wherein the first portion of the flex circuit comprises a first magnetic field sensing coil trace, and a second magnetic field sensing coil trace generally perpendicular to the first magnetic field sensing coil.
19. The catheter of claim 18 , wherein the second portion of the flex circuit comprises connection pads that connect to one or more electrical components and are configured to pass electrical signals arising in the first and second magnetic field sensing coil traces toward the control handle.
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US9724154B2 (en) | 2014-11-24 | 2017-08-08 | Biosense Webster (Israel) Ltd. | Irrigated ablation catheter with multiple sensors |
US10034707B2 (en) * | 2014-12-30 | 2018-07-31 | Biosense Webster (Israel) Ltd. | Catheter with irrigated tip electrode with porous substrate and high density surface micro-electrodes |
US10575742B2 (en) * | 2015-06-30 | 2020-03-03 | Biosense Webster (Israel) Ltd. | Catheter having closed electrode assembly with spines of uniform length |
-
2018
- 2018-03-19 US US15/925,521 patent/US10966783B2/en active Active
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2019
- 2019-02-08 AU AU2019200908A patent/AU2019200908A1/en not_active Abandoned
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- 2019-03-18 JP JP2019049458A patent/JP7362271B2/en active Active
- 2019-03-18 EP EP19163470.8A patent/EP3542744B1/en active Active
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- 2019-03-19 CN CN201910208051.6A patent/CN110279465A/en active Pending
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2021
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EP3542744B1 (en) | 2020-10-28 |
CN110279465A (en) | 2019-09-27 |
EP3542744A1 (en) | 2019-09-25 |
JP2019162425A (en) | 2019-09-26 |
US20190282297A1 (en) | 2019-09-19 |
AU2019200908A1 (en) | 2019-10-03 |
US10966783B2 (en) | 2021-04-06 |
IL264808B (en) | 2022-02-01 |
JP7362271B2 (en) | 2023-10-17 |
IL264808A (en) | 2019-05-30 |
CA3036944A1 (en) | 2019-09-19 |
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