WO2008048626A2 - Methods and devices for catheter advancement and delivery of substances therethrough - Google Patents
Methods and devices for catheter advancement and delivery of substances therethrough Download PDFInfo
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- WO2008048626A2 WO2008048626A2 PCT/US2007/022122 US2007022122W WO2008048626A2 WO 2008048626 A2 WO2008048626 A2 WO 2008048626A2 US 2007022122 W US2007022122 W US 2007022122W WO 2008048626 A2 WO2008048626 A2 WO 2008048626A2
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- Prior art keywords
- catheter
- guide element
- anchor
- catheters
- delivery catheter
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/064—Surgical staples, i.e. penetrating the tissue
- A61B17/0644—Surgical staples, i.e. penetrating the tissue penetrating the tissue, deformable to closed position
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3468—Trocars; Puncturing needles for implanting or removing devices, e.g. prostheses, implants, seeds, wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0485—Devices or means, e.g. loops, for capturing the suture thread and threading it through an opening of a suturing instrument or needle eyelet
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00238—Type of minimally invasive operation
- A61B2017/00243—Type of minimally invasive operation cardiac
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00743—Type of operation; Specification of treatment sites
- A61B2017/00778—Operations on blood vessels
- A61B2017/00783—Valvuloplasty
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B2017/0496—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials for tensioning sutures
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/06—Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
- A61B17/06004—Means for attaching suture to needle
- A61B2017/06019—Means for attaching suture to needle by means of a suture-receiving lateral eyelet machined in the needle
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2442—Annuloplasty rings or inserts for correcting the valve shape; Implants for improving the function of a native heart valve
- A61F2/2466—Delivery devices therefor
Definitions
- the methods and devices described herein relate generally to the field of advancement of catheters over a guide element and delivery of substances through those catheters (e.g., implants, such as anchors or leads, or drugs). More specifically, the methods described here are in the field of successive advancement of a plurality of catheters over a guide element where the guide element is attached to a body tissue that is accessible minimally invasively, or where the guide clement if left behind as an implant. The methods and devices described here may have particular utility in the area of mitral valve repair.
- Rapid-exchange catheters generally include a guidewire lumen that extends for only a portion of the length of the catheter shaft.
- a rapid-exchange catheter may be relatively easily threaded over a guidewire, delivered to a target site, and withdrawn from the target site. Because rapid-exchange catheters do not need to be threaded over the entire length of a guidewire, rapid-exchange catheters may be relatively short in length. In some variations, a rapid-exchange catheter may be shorter in length than the guidewire over which the rapid- exchange catheter is advanced. The guidewire, in turn, may also be relatively short in length.
- a rapid-exchange catheter After being withdrawn from a target site, a rapid-exchange catheter can be removed from the guidewire over which it was threaded, and exchanged with another rapid-exchange catheter, which, in turn, can be delivered to the target site over the guidewire.
- Some methods of removing a rapid-exchange catheter from a guidewire include withdrawing the rapid-exchange catheter over the guidewire.
- Other methods include using a rapid-exchange catheter with a perforated sheath, and splitting the sheath open at its perforations to remove the rapid-exchange catheter from the guidewire.
- rapid-exchange procedures can allow for different types of catheters (e.g., catheters having balloons of different sizes or catheters carrying different therapeutic agents) to be efficiently delivered to a target site in one procedure.
- catheters e.g., catheters having balloons of different sizes or catheters carrying different therapeutic agents
- the use of rapid-exchange catheters in a procedure may result in a reduction in the number of operations required to complete the procedure.
- Over-the-wire catheters generally include a guidewire lumen that extends along the entire length of the catheter shaft. Over-the-wire catheters may be used, for example, in peripheral procedures, such as balloon angioplasty procedures. An over-the-wire catheter may be relatively easily tracked over a guidewire and delivered to a target site. Once the over- the-wire catheter has been used to perform a procedure at the target site, it may be withdrawn over the guidewire and removed from the subject.
- Some of the methods described here generally comprise successively advancing a plurality of catheters over a guide element, wherein the guide element is attached to a body tissue.
- the body tissue may be accessible minimally invasively.
- the guide element may not be detached from the body tissue after the catheters have been advanced over the guide element.
- the methods may further comprise deploying at least one implant from at least one of the plurality of catheters.
- the implant may be any suitable implant. For example, it may be an anchor, a lead or electrode, or any other implant capable of fixedly securing the tether to the body tissue.
- the implant is an anchor, and the anchor is configured to self-expand and self-secure into a region of the body tissue.
- the body tissue may be any body tissue that is accessible minimally invasively, and in some variations, the body tissue comprises heart tissue (e.g., mitral valve tissue).
- the methods may be used to deploy a series of anchors (that are carried in one or more catheters) in the region of a heart valve annulus of a subject in order to reduce mitral valve regurgitation.
- the catheter may be a guide catheter, a sheath, a drug delivery catheter, a therapeutic catheter, a termination catheter, a cutting catheter, a locking catheter, a diagnostic catheter, a tool catheter, or any other suitable catheter.
- Some methods may include advancing one type of catheter over the guide element, and then advancing a different type of catheter over the guide element.
- Other methods described here comprise advancing a first delivery catheter to a first region of a body tissue, deploying a first anchor from the first delivery catheter, wherein the first anchor is attached to a guide element, proximally withdrawing the first delivery catheter, advancing a second delivery catheter over the guide element, and deploying a second anchor from the second delivery catheter.
- the second anchor may be slidably coupled to the guide element, so that the guide element will not be held rigidly in place at the site of the second anchor deployment.
- the anchors may have eyelets through which the guide element may be slidably disposed.
- the guide element may be slidably coupled to the anchor with the use of a lasso prior to insertion in the delivery catheter.
- the first and second anchors can be deployed to the same region or different regions of the body tissue, and any number of anchors may be deployed as desirable.
- the anchors self-expand and self-secure into different regions of the body tissue.
- any number or type of catheters may be used, and in some variations, advancing the first delivery catheter to the first region of the body tissue comprises advancing the first delivery catheter through a tunnel catheter.
- the tunnel catheter may have an opening positioned along its side wall, or otherwise positioned proximally of its distal tip, and in some variations, the first delivery catheter is advanced through the opening.
- any of the catheters. described here may be pre-shaped or pre-formed in some fashion or in a particular geometry. For example, in some instances, it may be desirable for the catheter to include one or more curves to better conform to the target anatomy. In some of the variations described here, the distal portion of the tunnel catheter is pre-shaped to include at least one curve.
- the catheters may also have any number of suitable lumens, such as lumens that are configured to allow passage of a guide element therethrough. In some variations, a catheter described here may have a lumen that is located in either a proximal section or a distal section of the catheter, but not in both sections.
- the guide element may comprise or be made from any suitable material.
- the guide element may be made from an artificial or natural suture material, or it may be made from a metal or shape memory alloy.
- the guide element may be made from one or more absorbable materials, and/or one or more non-absorbable materials.
- the guide element is made from polyester impregnated with polytetrafluoroethylene.
- the guide element is a tether (e.g., a suture).
- the guide element may be in the form of a wire.
- the guide element may be braided or woven, and/or may include multiple different layers.
- these methods may deploy any number of anchors, and in some variations, the anchors are deployed into heart tissue, e.g., heart tissue in the region of the mitral valve.
- the guide element the delivery catheters were advanced over may be cinched, or pulled proximally.
- the result may be a geometric change in at least one of the mitral valve annulus and the tissue surrounding the mitral valve annulus, a reduction in the circumference of the mitral valve annulus, enhancement of mitral valve leaflet apposition, and/or a reduction in mitral valve regurgitation.
- Devices for stabilizing a catheter with respect to a body tissue comprise a catheter having an expandable member configured to engage against a first portion of tissue in order to stabilize the catheter with respect to a second portion of tissue.
- the expandable member may be any member suitable for providing such stabilization.
- the expandable member may be a low-pressure inflatable balloon made of a compliant material, or the expandable member may be made of a shape memory material, such as a nickel titanium alloy basket or wing.
- a low-pressure balloon is used and only a portion of the balloon is configured to inflate.
- the catheters comprise at least one lumen.
- the catheters comprise a first and a second lumen where the first and second lumens are positioned adjacent to one another, where at least a portion of the first and second lumens are configured to allow the passage of the guide element therethrough, and where the second lumen is accessible from the first lumen.
- the catheter may be any suitable catheter and may have any number of desirable functions (e.g., the catheter may be a cutting catheter, a termination catheter, a device delivery catheter, a drug delivery catheter, a therapeutic catheter, a diagnostic catheter, a tool catheter, etc.).
- the catheter may be a therapeutic catheter that is configured for use in tissue altering therapy, such as ablation.
- the catheter is a device delivery catheter used for electrical pacing or for delivery of at least one anchor.
- the anchor is typically positioned in the first lumen.
- FIG. 1 is a cross-sectional view of a heart.
- FIG. 2 is a cross-sectional view of a portion of a heart.
- FIG. 3A is a flowchart representation of a method for delivering at least two anchors into a region of a heart valve annulus.
- FIGS. 3B-3E schematically depict variations of anchor deployment.
- FIGS. 4A-4I provide a detailed depiction of a method for advancing at least two delivery catheters to the sub-annular groove ("SAG") of a heart valve to deliver at least two anchors into a region of a heart valve annulus.
- SAG sub-annular groove
- FIG. 4J is an enlarged view of region 4J of FIG. 41.
- FIGS. 5A-5D illustrate a method for engaging a guide element with an anchor.
- FIGS. 6A-6F depict different variations of lassos.
- FIG. 7 A is a perspective view of a locking catheter.
- FIG. 7B is a cross-sectional view of the locking catheter of FIG. 7 A, taken along line 7B-7B.
- FIG. 8 A is a cross-sectional view of a portion of a tunnel catheter through which a delivery catheter is advanced
- FIG. 8B is a side cross-sectional view of the tunnel catheter of FIG. 8 A
- FIG. 8C is a side cross-sectional view of the tunnel catheter of FIG. 8A.
- FIG. 9 is a cross-sectional view of a portion of a tunnel catheter through which a delivery catheter is advanced.
- FIGS. 10A- 1OE are side views of different routing configurations of guide elements in locking catheters.
- FIGS. 1 IA-11C are side views of different routing configurations of guide elements in cutting catheters.
- FIG. 12A is a perspective view of a delivery catheter
- FIG. 12B is a front view of the delivery catheter of FIG. 12 A
- FIGS. 12C and 12D are side and bottom views, respectively, of a portion of the delivery catheter of FIG. 12 A.
- FIGS. 13A-13C depict various expandable members that may be used to help stabilize a catheter in the SAG.
- FIG. 14A is a perspective view of a tunnel catheter.
- FIG. 14B is a cross-sectional view of the tunnel catheter of FIG. 14A, taken along line 14B-14B.
- Described here are methods for successively advancing a plurality of catheters over a guide element, and method and devices for delivering anchors to a region of a body tissue. It should be understood from the outset that while methods of advancing a plurality of catheters to heart valve tissue are described in detail here, the methods may be used, and are contemplated for use, with any body tissue that may be accessed minimally invasively. Examples of body tissue that may be accessed minimally invasively include body tissue that may be accessed percutaneously (e.g., intravascularly), laparoscopically, endoscopically, robotically, and/or through one or more airways.
- the methods may be applied to the coronary sinus, the tricuspid valve, the left and/or right ventricles, and/or one or more veins.
- the methods may be used with the bladder, the urethra, the lungs, the stomach, the liver, the kidneys, the gallbladder, and/or in peripheral applications (e.g., in the legs).
- the methods may be used in gastrointestinal applications or in transbrachial applications.
- the methods may be used to deliver therapy, such as tissue modification, electrical pacing, or an implant.
- the guide element may be used to facilitate delivery of one or more tools to a target site.
- the guide element may be used to facilitate a robotic procedure, such as the robotic delivery of one or more tools to a target site.
- the methods of advancing a plurality of catheters over a guide element comprise advancing multiple catheters over a guide element, where the guide element is attached to body tissue that is accessible minimally invasively.
- the methods may comprise deploying at least one implant from one of the catheters.
- the implant may be any suitable or desirable implant.
- the implant may be a lead or electrode, an anchor, or any other implant.
- the implant may also be of any suitable shape and size.
- anchors When anchors are used, they may be configured to self-expand and self-secure into the tissue. Suitable anchors and guide elements will be described in more detail below.
- any suitable catheter may be used and advanced over the guide element.
- the catheter may be a guide catheter, a sheath, a drug delivery catheter, a therapeutic catheter, a termination catheter, a locking catheter, a cutting catheter, a diagnostic catheter, a tool catheter, or any other suitable catheter.
- a guide catheter a sheath
- a drug delivery catheter a therapeutic catheter
- a termination catheter a termination catheter
- a locking catheter a cutting catheter
- a diagnostic catheter a tool catheter, or any other suitable catheter.
- these methods generally comprise advancing a first delivery catheter to a first region of a body tissue, deploying a first anchor from the first delivery catheter, wherein the first anchor is attached to a guide element, proximally withdrawing the first delivery catheter, advancing a second delivery catheter over the guide element, and deploying a second anchor from the second delivery catheter.
- these methods may deploy any number of anchors, and in some variations, the anchors are deployed into heart tissue, e.g., tissue in the region of the mitral valve.
- the guide element the delivery catheters were advanced over may be cinched, or pulled proximally to reduce the circumference of the mitral valve annulus.
- a mitral valve may be repaired using a relatively efficient and minimally invasive procedure.
- the use of a single guide element to deliver multiple delivery catheters and/or to deploy multiple anchors may result in reduced procedure time and a reduced likelihood of error in anchor placement.
- the use of a single anchored guide element may allow for the delivery of multiple delivery catheters and/or deployment of multiple anchors to a target site, without requiring visualization of the delivery and/or deployment.
- the guide element may be fixedly attached or otherwise secured to a target site and used as a track for the delivery of multiple delivery catheters and/or deployment of multiple anchors to the target site, and also may be left at the target site when the procedure is finished, to serve as an implant itself.
- FIG. 1 is a cross-sectional schematic representation of a heart (100).
- heart (100) includes the superior vena cava (SVC), the right atrium (RA), the right ventricle (RV), the tricuspid valve leaflets (TVL), the aorta (A), the mitral valve leaflets (MVL), the left atrium (LA), and the left ventricle (LV).
- SVC superior vena cava
- RA right atrium
- RV right ventricle
- RV tricuspid valve leaflets
- A the aorta
- A the mitral valve leaflets
- LA left atrium
- LV left ventricle
- LV left ventricle
- the mitral valve has two leaflets (MVL), the anteromedial leaflet and the posterolateral leaflet.
- mitral valve annulus Surrounding the opening of the mitral valve is a fibrous ring known as the mitral valve annulus.
- a normally functioning mitral valve allows blood to flow into the left ventricle during ventricular diastole, and prevents blood from going from the ventricle to the left atrium during systole, in a retrograde fashion.
- a mitral valve that allows blood to flow into the left atrium is said to have regurgitation, and in instances where the regurgitation is severe, mitral valve repair may be desirable.
- FIG. 2 provides a schematic cross-sectional view of a portion 200 of the mitral valve (MV) anatomy.
- portion (200) includes a mitral valve leaflet (MVL).
- the annulus (AN), which surrounds the valve, is also shown.
- the SAG is the track defined by the joinder of the horizontal underside of the mitral valve annulus (AN) with the ventricular wall (VW).
- An equivalent subannular groove is positioned on the underside of the tricuspid valve, and the methods and devices described here may be used with respect to the tricuspid valve as well.
- a catheter may be inserted into the femoral artery and passed through the right atrium (RA), through the interatrial septum in the area of the foramen ovale behind the aorta (A), and into the left ventricle. Upon further advancement, the distal portion of the catheter will naturally travel under the posterolateral valve leaflet into the SAG. The catheter may be further advanced along the SAG, either partially or completely around the circumference of the valve. It is often desirable to have the catheter seated at the intersection of the mitral valve leaflets (MVL) and the ventricular wall, adjacent to, and very near the annulus from the underside.
- MCL mitral valve leaflets
- a pre- shaped catheter e.g., a catheter having a pre-shaped distal end or portion
- a pre-shaped catheter may aid in placement by conforming to the target anatomy. While the approach described above employs access through the femoral artery, access may be obtained through other suitable vessels as well (e.g., the jugular artery).
- FIG. 3 A provides a flowchart depiction of a method (300) for deploying at least two anchors in the region of a heart valve annulus.
- this illustrative method comprises advancing a guide catheter to the SAG (310), advancing a guidewire through a lumen of the guide catheter (320), advancing a tunnel catheter over the guidewire (330), and proximally withdrawing the guidewire from the tunnel catheter (340).
- a first delivery catheter may be advanced through the lumen of the tunnel catheter (350) and a first anchor may be deployed into a first region of the heart valve annulus (360).
- the first anchor is typically fixedly attached or otherwise secured to a guide element, such as a tether.
- a guide element such as a tether.
- the guide element may be made from any suitable or desirable biocompatible material.
- the guide element may be braided or not braided, woven or not woven, reinforced or impregnated with additional materials, or may be made of a single material or a combination of materials.
- the guide element may be made from a suture material (e.g., absorbable suture materials such as polyglycolic acid and polydioxanone, natural fibers such as silk, and artificial fibers such as polypropylene, polyester, polyester impregnated with polytetrafluoroethylene, nylon, etc.), may be made from a metal (absorbable or non-absorbable), may be made from a metal alloy (e.g., stainless steel), may be made from a shape memory material, such as a shape memory alloy (e.g., a nickel titanium alloy), may be made from combinations thereof, or may be made from any other biocompatible material.
- a suture material e.g., absorbable suture materials such as polyglycolic acid and polydioxanone, natural fibers such as silk, and artificial fibers such as polypropylene, polyester, polyester impregnated with polytetrafluoroethylene, nylon, etc.
- a metal e.g., stainless steel
- the guide element when pulled proximally, the guide element will cinch or reduce the circumference of the mitral valve annulus.
- the guide element may be in the form of a wire.
- the guide element may include multiple layers, and/or may include one or more coatings.
- the guide element may be in the form of a polymer-coated wire.
- the guide element may be formed of a combination of one or more sutures and one or more wires.
- the guide element may be formed of a suture that is braided with a wire.
- the guide element may be formed of one or more electrode materials.
- the guide element may be formed of one or more materials that provide for the telemetry of information (e.g., regarding the condition of the target site).
- the guide element may include one or more therapeutic agents (e.g., drugs, such as time-release drugs).
- the guide element may be partially or entirely coated with one or more therapeutic agents.
- the guide element may be used to deliver one or more growth factors and/or genetic regenerative factors.
- the guide element may be coated with a material (e.g., a polymer) that encapsulates one or more therapeutic agents, or in which one or more therapeutic agents are embedded.
- the therapeutic agents may be used, for example, to treat the target site to which the guide element is fixedly attached or otherwise secured.
- the guide element may include one or more lumens through which a therapeutic agent can be delivered.
- the first delivery catheter is withdrawn proximally and the tunnel catheter is positioned at a different location about the SAG (370).
- a second delivery catheter is then advanced over the guide element through the lumen of the tunnel catheter (380).
- the guide element may enter the second delivery catheter through an opening at its distal end, and exit the second delivery catheter through an opening in its side wall that is proximal to its distal end.
- the guide element may enter the second delivery catheter through an opening at its distal end, and exit the second delivery catheter through an opening at its proximal end.
- a second anchor is deployed into a second region of the heart valve annulus (390).
- FIGS. 3B and 3C depict the mitral valve (MV) of FIG. 2 schematically from an inferior perspective looking up.
- anchors (392) are shown deployed in the mitral valve in an anterior-posterior fashion
- FIG. 3C anchors (394) are shown deployed in a transverse fashion.
- FIG. 3D pairs, or sets of two anchors (396) are shown deployed.
- any number of anchors e.g., two, three, four, five, six, seven, etc. may make up a set, and that the sets need not be symmetrically or evenly spaced about the annulus as shown in FIG. 3D.
- the anchors (or sets of anchors) may be deployed symmetrically or evenly spaced about the annulus as shown in FIG. 3E with reference to anchors (398), but they need not be.
- FIG. 3 A shows multiple anchors being delivered via multiple delivery catheters
- other methods of delivering the anchors may be used. For example, it some instances, it may be desirable to deliver multiple anchors from a single delivery catheter as described in more detail in U.S. Pat. Appl. Serial No. 11/201,949, which is hereby incorporated by reference in its entirety. Similarly, it may be desirable to combine multiple anchor delivery and deployment via a single delivery catheter with single anchor delivery and deployment via a single delivery catheter. Ordinary artisans will choose the number and type of catheters most appropriate for their procedure and circumstances.
- FIGS. 4A-4I provide a more detailed depiction of the method shown in flowchart form in FIG. 3 A.
- the mitral valve (MV) of FIG. 2 is depicted schematically from an inferior perspective looking up.
- a guide catheter (404) is advanced to SAG (402) using any of the access routes (or any other suitable access routes) previously described.
- a guidewire (406) is advanced through the lumen of guide catheter (404).
- Guidewire (406) is advanced beyond the distal end (408) of guide catheter (404), so that guidewire (406) extends further along SAG (402) than guide catheter (404), as shown in FIG. 4B.
- Tunnel catheter (410) is advanced through guide catheter (404), over guidewire (406), which is shown in FIG. 4C.
- Tunnel catheter (410) may be any suitable catheter, and in some instances, as discussed above, it is desirable that the tunnel catheter be pre-shaped or pre-formed at its distal end, such as the tunnel catheter illustrated in FIG. 4C. As shown there, the tunnel catheter has a pre- shaped distal portion comprising a curve. In this way, the tunnel catheter may more easily conform to the geometry of the mitral valve. It should also be understood that while one distal curve is shown, any of the catheters or guidewires described here may be pre-shaped or preformed to include any number of suitable curves. Of course, the guidewires and/or catheters described here may also be steerable.
- the tunnel catheter may also comprise an expandable member configured to stabilize the catheter with respect to the SAG.
- the expandable member may be configured to engage against a first portion of tissue in order to stabilize the catheter with respect to a second portion of tissue.
- the expandable member may be any suitable expandable member.
- it may be a low-pressure balloon (1300), as shown in FIG. 13 A.
- the low-pressure balloon may be made of a compliant material such as silicone, urethane, natural latex, polyisoprene or other rubbers or rubber copolymers/blends (e.g., styrenic block copolymers, polyolefin blends, polyurethane alloys, etc.), combinations or blends thereof, or other suitable compliant materials known in the art.
- a compliant material such as silicone, urethane, natural latex, polyisoprene or other rubbers or rubber copolymers/blends (e.g., styrenic block copolymers, polyolefin blends, polyurethane alloys, etc.), combinations or blends thereof, or other suitable compliant materials known in the art.
- an elastomeric polyurethane alloy is used.
- the expandable member may also be made of a shape memory material such as a nickel titanium alloy, and have the shape of a wing or an arm (1302), as shown in FIG.
- the expandable member is a low-pressure compliant balloon, inflatable with a pressurized solution (e.g., saline, or saline in combination with a contrast agent, such as a 75%/25% mixture of saline to contrast).
- a pressurized solution e.g., saline, or saline in combination with a contrast agent, such as a 75%/25% mixture of saline to contrast.
- the pressurized solution may be delivered to the balloon via a separate infusion lumen.
- the infusion lumen may be concentric with the lumen through which the delivery catheters are advanced, but need not be.
- the infusion lumen may also be located along one or both sides of the tunnel catheter.
- the size of the expandable member will depend upon the particular body tissue to be stabilized, but in the case of SAG stabilization, a half-inch long to an inch-long balloon may be appropriate.
- One or both sides of the balloon may be inflated, but in instances of SAG stabilization, it is more desirable to inflate only that side opposite the SAG. In this way, the tunnel catheter is pushed and held in greater apposition with the SAG.
- the balloon may be made to inflate with variable stiffness or rigidity along its length for better apposition against certain portions of tissue.
- tunnel catheter (410) After tunnel catheter (410) has been positioned in the SAG, guidewire (406) is withdrawn proximally as shown in FIG. 4D. After guidewire (406) has been withdrawn, a delivery catheter (412) may then be advanced through the lumen of the tunnel catheter (410). As shown in FIG. 4E, a distal portion (414) of delivery catheter (412) is advanced through an opening (416) in distal portion (411) of tunnel catheter (410). Next, and as shown in FIG. 4F, an anchor (420), which is attached to a guide element (shown in FIG. 4G as a tether (422)), is deployed from delivery catheter (412).
- a guide element shown in FIG. 4G as a tether (422)
- the anchor may be deployed from the delivery catheter in any suitable fashion, as will be described in more detail below when more detail is focused on the delivery catheter.
- the anchor may be deployed using a push-pull wire (e.g., by pushing the wire distally or pulling the wire proximally), using a plunger, or may be deployed with any other suitable actuation technique.
- anchor (420) may be attached to tether (422) by any suitable attachment method. For example, one or more knots, welded regions, and/or adhesives may be used.
- the anchors for use with the methods and devices described here may be any suitable anchor.
- the anchors may be made of any suitable material, may be any suitable size, and may be of any suitable shape.
- the anchors may be made of one material or more than one material.
- Examples of anchor materials include super-elastic or shape memory materials, such as nickel-titanium alloys and spring stainless steel.
- Examples of anchor shapes include T- tags, rivets, staples, hooks (e.g., C-shaped or semicircular hooks, curved hooks of other shapes, straight hooks, barbed hooks), multiple looped anchors, and clips.
- the anchors may be configured to self-expand and self-secure into tissue, but need not be configured in such a fashion.
- a single guide element can be used to deliver and deploy multiple anchors having different shapes.
- a single guide element can be used in the delivery and deployment of multiple anchors having different sizes.
- suitable anchors are described in more detail, for example, in U.S. Pat. Appl. Serial No. 11/202,474, which is hereby incorporated by reference in its entirety.
- Anchor (420), shown in FIG. 4F, self-expands as it exits delivery catheter (412) and self-secures into a region of the mitral valve annulus (AN). It should be understood that the anchors may be deployed into the annular tissue directly, or slightly below the annular tissue in the vicinity of the SAG.
- FIG. 4G shows anchor (420), attached to tether (422) and secured to the mitral valve annulus (AN).
- tunnel catheter (410) is now moved to a different location or position in the SAG, and a second delivery catheter (424) is advanced through the lumen of tunnel catheter (410), over tether (422), as shown in FIG. 41.
- FIGS. 5A-5D show a method that includes using a lasso to thread a tether into a delivery catheter, and to slidably engage the tether with an anchor.
- lasso the amount of time it takes to thread the tether into the delivery catheter and anchor can be reduced.
- an anchor (504) is pre-loaded into a lumen (506) of a delivery catheter (502), and the proximal end (508) of a tether (500) is in the proximity of delivery catheter (502).
- a lasso (510) is introduced into lumen (506). Lasso (510) is threaded through an eyelet (512) of anchor (504), and is used to engage tether (500), as shown in FIG. 5C.
- FIG. 5D lasso (510) is withdrawn proximally, thereby pulling tether (500) through eyelet (512).
- lasso (510) includes a wire portion (514) and a loop (516) at the distal end (518) of the wire portion. While loop (516) is shown as generally rounded in shape, in some variations, a lasso can include a loop having a different shape.
- FIGS. 6A-6F show lassos having differently shaped loops. More specifically, FIG. 6A shows a lasso (600) with a substantially symmetrical round loop (602), FIG. 6B shows a lasso (610) with an asymmetrical round loop (612), FIG. 6C shows a lasso (620) with a square loop (622), FIG.
- a lasso may include an open guide element- engaging structure, such as a hook.
- FIG. 6F shows a lasso (650) with a hook (652) at one end that can be used to engage a guide element.
- the shape of a lasso's guide element- engaging structure may be selected based on the configuration of the catheter through which the lasso is being threaded, and/or the type of guide element that is being threaded.
- a lasso can be formed of, for example, a wire including one or more metals, metal alloys (e.g., nickel-titanium alloys), and/or polymers.
- the wire can have a circular cross-section or a non-circular cross-section.
- the lasso's guide element-engaging structure and wire portion may be formed from the same material or different materials.
- the guide element-engaging structure is integrally formed with the wire portion.
- the guide element-engaging structure is attached (e.g., welded) to the wire portion.
- the lasso or a portion of the lasso (e.g., the loop) can be relatively flexible.
- a lasso may be formed of a wire that is covered with a sheath, such as a polymer sheath, and/or a coating, such as a polymer coating. The presence of the sheath or coating may enhance the passage of the lasso through a delivery catheter lumen.
- FIGS. 5A-5D show a method that includes using a lasso to thread a tether through a delivery catheter and an anchor
- the method can also be used to thread guide elements, such as tethers, through other types of catheters (e.g., guide catheters, sheaths, drug delivery catheters, therapeutic catheters, locking catheters, diagnostic catheters, tool catheters, cutting catheters) and/or implants.
- catheters e.g., guide catheters, sheaths, drug delivery catheters, therapeutic catheters, locking catheters, diagnostic catheters, tool catheters, cutting catheters
- FIGS. 7 A and 7B show a locking catheter (700) including a tubular member (702) having a wall (712) with four openings (704, 706, 708, and 710) formed in it.
- Locking catheters may be used to maintain tension in a guide element, such as a tether, once the guide element has been cinched (as described in further detail below), and to stabilize the guide element for cutting.
- a tether (714) has been threaded into locking catheter (700), through holes (704, 706, 708, and 710).
- the tether may be threaded into the locking catheter using, for example, a lasso, such as one of the lassos described above.
- the lasso may have a relatively flexible loop which may enhance the maneuverability of the lasso through the holes in the locking catheter.
- locking catheter (700) is shown as including four holes through which tether (714) is threaded
- locking catheters can include other numbers of holes.
- some variations of locking catheters may include fewer holes (e.g., two holes), while other variations of locking catheters may include more holes (e.g., six holes, eight holes, etc.).
- the likelihood of movement by a guide element that is threaded through the holes may decrease.
- a threading device such as a threading rod
- the guide element may be threaded around a groove in the threading rod, and/or may be threaded through one or more holes and/or lumens in the threading rod.
- the threading rod can provide support to the guide element, thereby making it easier to thread the guide element into the catheter. This, in turn, can reduce the total guide element-threading time. Threading devices are described, for example, in U.S. Pat. Appl. Serial No.
- delivery catheter (424) is advanced through opening (416) in distal portion (411) of tunnel catheter (410), and is used to deploy anchor (426).
- FIG. 8B shows a cross-sectional view of tunnel catheter (410), straightened to show its dimensions.
- Opening (416) which is formed in a wall (450) of tunnel catheter (410), can be circular or non-circular.
- opening (416) has a dimension (D) which may be a length, a width, or a diameter of the opening. In some variations, such as when dimension (D) is a width of the opening, dimension (D) may be from about 0.08 inch to about 0.09 inch. In certain variations, such as when opening (416) is circular and dimension (D) is a diameter of the opening, dimension (D) may be from about 0.09 inch to about 0.15 inch.
- dimension (D) when dimension (D) is a length of the opening, dimension (D) may be from about 0.15 inch to about 0.2 inch.
- Opening (416) may be formed in wall (450) using, any suitable technique, for example, with use of a laser.
- tunnel catheter (410) has an inner diameter (IDl), an outer diameter (ODl), and a length (Ll).
- Length (Ll) may measure, for example, from about 46 inches to about 48 inches.
- inner diameter (IDl) may be from about 0.085 inch to about 0.1 inch.
- Inner diameter (IDl) may be selected, for example, based on the dimensions of delivery catheter (424). As an example, if delivery catheter (424) has a relatively large outer diameter, then inner diameter (IDl) may also be relatively large, to provide for relatively rapid advancement of delivery catheter (424) through tunnel catheter (410).
- outer diameter (ODl) may be from about 0.135 inch to about 0.15 inch. Outer diameter (ODl) may be selected, for example, based on the planned path for advancement of tunnel catheter (410) to the target tissue.
- Tunnel catheter (410) can be formed of any of a number of different materials.
- suitable materials include polymers, such as polyether-block co- polyamide polymers, copolyester elastomers, thermoset polymers, polyolefins (e.g., polypropylene or polyethylene, including high-density polyethylene and low-density polyethylene), polytetrafluoroethylene, ethylene vinyl acetate, polyamides, polyimides, polyurethanes, polyvinyl chloride (PVC, fluoropolymers (e.g., fluorinated ethylene propylene, perfluoroalkoxy (PFA) polymer, polyvinylidenefluoride, etc.), polyetheretherketones (PEEKs), and silicones.
- PVC polyvinyl chloride
- fluoropolymers e.g., fluorinated ethylene propylene, perfluoroalkoxy (PFA) polymer, polyvinylidenefluoride,
- tunnel catheter (410) examples include Nylon 6 (e.g., Zytel ® HTN high performance polyamides from DuPontTM), Nylon 11 (e.g., Rilsan ® B polyamides from Arkema Inc.), and Nylon 12 (e.g., Grilamid ® polyamides from EMS-Grivory, Rilsan ® A polyamides from Arkema Inc., and Vestamid ® polyamides from Degussa Corp.).
- tunnel catheter (410) may be formed of multiple polymers.
- tunnel catheter (410) may be formed of a blend of different polymers, such as a blend of high-density polyethylene and low-density polyethylene.
- tunnel catheters While wall (450) of tunnel catheter (410) is formed of a single layer, some variations of tunnel catheters may include walls having multiple layers (e.g., two layers, three layers). Furthermore, some variations of tunnel catheters may include at least two sections that are formed of different materials and/or that include different numbers of layers. Additionally, certain variations of tunnel catheters may include multiple (e.g., two, three) lumens. The lumens may, for example, be lined and/or reinforced (e.g., with braiding).
- FIGS. 14A and 14B shows a tunnel catheter (1400) having multiple lumens.
- tunnel catheter (1400) includes a body (1402) having a proximal section (1420), a transition section (1430), and a distal section (1440), and defining a primary lumen (1404) and a secondary lumen (1406).
- primary lumen (1404) may be used to advance a delivery catheter to a target tissue
- secondary lumen (1406) may be used as an inflation lumen.
- secondary lumen (1406) may be injected with a mix of 25% contrast agent and 75% heparinized saline to inflate a balloon carried by the tunnel catheter.
- Primary lumen (1404) is lined with a liner (1408) including a braided reinforcement (1410), and secondary lumen (1406) is similarly lined with a liner (1412) including a braided reinforcement (1414).
- Body (1402) may be formed of one or more materials, such as one or more polymers.
- proximal section (1420) of body (1402) may be formed of a blend of high-density polyethylene (HDPE) and low-density polyethylene (LDPE)
- transition section (1430) of body (1402) may be formed of DuPontTM 20 low-density polyethylene (from DuPontTM)
- distal section (1440) may be formed of Elvax 450 ethylene vinyl acetate (from DuPontTM).
- proximal section (1420) may be about 28 inches long
- transition section (1430) may be about eight inches long
- distal section (1440) may be about ten inches long.
- other lengths may be used for the proximal, transition, and distal sections.
- Liner (1408) may be formed of high-density polyethylene or polytetrafluoroethylene (e.g., etched polytetrafluoroethylene), and liner (1412) may be formed of a flattened polyimide.
- Braided reinforcements (1410) and (1414) may be formed of the same material or different materials.
- An example of a material that may be suitable for one or both of the braided reinforcements is stainless steel, such as 304V stainless steel.
- FIGS. 8A and 8B show one variation of a tunnel catheter
- FIG. 9 shows a tunnel catheter (900), where a delivery catheter (902) is advanced out and through the distal end (904) of tunnel catheter (900).
- FIG. 8C provides a cross-sectional view of delivery catheter (424), straightened to show its dimensions.
- delivery catheter (424) has an inner diameter (ID2), an outer diameter (OD2), and a length (L2).
- Length (L2) may be, for example, from about 120 centimeters to about 150 centimeters.
- inner diameter (ID2) may be from about 0.045 inch to about 0.06 inch.
- Inner diameter (ID2) can be selected, for example, based on the sizes and/or types of anchors being deployed from the delivery catheter.
- outer diameter (OD2) may be from about 0.07 inch to about 0.095 inch.
- Delivery catheter (424) can be formed of any of a number of different materials. Examples of suitable materials include polymers, such as the polymers described above with reference to tunnel catheter (410), metals (e.g., platinum, gold), metal alloys (e.g., nickel-titanium alloys such as Nitinol), and combinations of these materials. Delivery catheter (424) may be formed of some or all of the same materials as tunnel catheter (410), or may be formed of different materials from tunnel catheter (410). While delivery catheter (424) is shown as including a wall (425) that is formed of one layer, some variations of delivery catheters may include walls that are formed of multiple layers. Furthermore, delivery catheters may include at least two sections that are formed of different materials and/or that include different numbers of layers.
- suitable materials include polymers, such as the polymers described above with reference to tunnel catheter (410), metals (e.g., platinum, gold), metal alloys (e.g., nickel-titanium alloys such as Nitinol), and combinations of these materials. Delivery catheter (
- FIG. 8C shows one variation of a delivery catheter
- a delivery catheter can have one lumen or multiple (e.g., two, three) lumens.
- one section of a delivery catheter can have fewer lumens than another section of the delivery catheter.
- a distal section of a delivery catheter may have one lumen, while a proximal section of the delivery catheter may have two or three lumens.
- the lumens in a delivery catheter may be, for example, guide element lumens and/or infusion lumens (e.g., for the infusion of one or more therapeutic agents into a target tissue).
- a delivery catheter may include a generally tubular member and a lumen formed on a surface of the generally tubular member.
- the lumens in a delivery catheter may extend along the length of the delivery catheter, may be shorter than the delivery catheter, or may be a combination of the two.
- a lumen may be located only in a distal section of a delivery catheter, or only in a proximal section of a delivery catheter.
- certain variations of delivery catheters, or other types of catheters may include other structures through which a guide element can be threaded.
- some variations of delivery catheters may include slotted regions on their outer surfaces. The slotted regions may be used, for example, to thread the delivery catheters over a guide element.
- FIGS. 12A-12D show different detailed views of a variation of a delivery catheter (1200) that can be used to deliver one or more anchors to a target site.
- delivery catheter (1200) has a distal region (1204) including a tip (1202), an anchor- holding region (1206) including a primary lumen (1208), an intermediate region (1210) including both primary lumen (1208) and a secondary lumen (1212), and a proximal region (1214) including primary lumen (1208).
- An anchor (1216) is disposed within primary lumen (1208), in the anchor-holding region (1206). While only one anchor is shown in the anchor- holding region, some variations of delivery catheters may include an anchor-holding region that is adapted to hold multiple anchors.
- FIGS. 12A-12D depict anchors adapted to be deployed from the distal end of the delivery catheter, it should be understood that the anchors may be deployed from any suitable region of the delivery catheter, as desirable. For example, if desirable, the anchor may be delivered out of a side port or hole on the delivery catheter.
- a tether (1218) is threaded into a slot (1219) of tip (1202) (shown in FIGS. 12C and 12D), and through an eyelet (1226) of anchor (1216).
- the tether After extending through the eyelet, the tether exits primary lumen (1208), and extends along an exterior surface (1221) of delivery catheter (1200) for the remainder of the length of the anchor- holding region, as shown in FIG. 12C. The tether then enters secondary lumen (1212), and extends through the length of the secondary lumen, exiting the secondary lumen at an end of distal region (1214).
- An actuator (1220) is slidably disposed within primary lumen (1208), and can be used to deploy anchor (1216).
- the actuator is in the form of a pushable generally tubular member, although other forms of actuators may be used. For example, in some variations, a solid rod may be used as an actuator.
- a retrieval suture (1224) is slidably disposed within actuator (1220), and extends past the distal end (1222) of the actuator.
- the retrieval suture loops through eyelet (1226) of anchor (1216), so that it is engaged with anchor (1216). In this way, anchors that have been misfired or misplaced may be retrieved proximally within delivery catheter (1200) for redeployment.
- the retrieval suture is also, of course, capable of being disengaged from anchor (1216) after appropriate placement of the anchor.
- the retrieval suture may be disengaged from the anchor by pulling on the proximal end of the retrieval suture and withdrawing the retrieval suture from the anchor eyelet and the catheter.
- Retrieval suture (1224) may be formed of, for example, any of the tether materials described above. Furthermore, while a delivery catheter including a retrieval suture has been described, in some variations, a delivery catheter may not include a retrieval suture, or may include multiple retrieval sutures.
- anchor (426) self-expands and self- secures to tissue in the region of the mitral valve annulus (AN).
- anchor (426) self-secures to a different region of the mitral valve annulus from anchor (420).
- FIG. 4J shows that while anchor (420) is fixedly attached to tether (422), anchor (426) is slidably coupled to tether (422). More specifically, anchor (420) includes an eyelet (438) that is fixedly attached to the tether at an attachment point (440), and anchor (426) includes an eyelet (436) through which the tether is threaded. The threading of the tether through eyelet (436) causes anchor (426) to be slidably engaged with the tether. Thus, if the tether is cinched, then the tether will slide through eyelet (436). Tether (422) can be threaded through multiple anchors in this manner.
- the method described with reference to FIGS. 4A-4I can be repeated as desired to deploy multiple (e.g., at least two, at least three) anchors that can self- secure to various regions of the mitral valve annulus (AN).
- multiple anchors e.g., at least two, at least three
- five different delivery catheters can be successively advanced over a single tether to deploy five anchors into different regions of the mitral valve annulus.
- eight anchors can be deployed into the mitral valve annulus, along an arc of about 240°. Again, the deployed anchors can be uniformly spaced apart, or can have varying amounts of space between them.
- tether (422) can be cinched, thereby pulling the anchors closer together, and reducing the circumference of the mitral valve annulus.
- Tether (422) can be terminated after the desired extent of reduction has been achieved (e.g., as determined by ultrasound and fluoroscopy).
- a clip can be attached to tether (422) proximal to the proximal-most anchor, to maintain the tension of tether (422) between the anchors.
- Tether (422) can then be cut proximal to the clip.
- attachment and cutting can be achieved using a termination device, such as a termination catheter.
- one or more cutting and/or locking catheters can be used to maintain the tension in a cinched guide element and to remove the unused portion of the guide element, after cinching has been completed. Termination devices are described, for example, in U.S. Pat. Appl. Serial Nos. 11/232,190 and 11/270,034, both of which are hereby incorporated by reference in their entirety.
- Some methods of terminating tether (422) may include withdrawing tunnel catheter (410) from guide catheter (404) prior to advancing a termination catheter over tether (422) to the proximal-most anchor. The termination catheter may then be used for attachment and cutting of tether (422).
- Other methods may include first attaching a clip to tether (422) proximal to the proximal-most anchor to maintain the tension in tether (422), and then withdrawing tunnel catheter (410) from guide catheter (404).
- a method may include attaching tether (422) to the proximal-most secured anchor, and then cutting tether (422) proximal to the anchor to which tether (422) has been attached.
- Tether (422) can be attached to the proximal-most anchor using, for example, one or more adhesives, and/or one or more knotting, crimping, and/or tying techniques. While threading, cinching, and termination techniques have been described with respect to a tether, these techniques may be used with other guide elements as well.
- a guide element can be threaded through a termination catheter in any of a number of different ways.
- FIGS. 10A-10E show examples of different routings of tethers through locking catheters
- FIGS. 1 IA-11C show examples of different routings of tethers through cutting catheters.
- a locking catheter (1000) includes a tip (1002) and a shaft (1004).
- a tether (1006) is threaded through four openings in the tip, so that the locking catheter secures the tether, thereby maintaining the tension in the tether. While tether (1006) is threaded through four openings in tip (1002), guide elements can be threaded through different numbers of openings in a catheter tip.
- FIG. 1OB shows a locking catheter (1014) including a tip (1015), and a tether (1016) that has been threaded through two openings in the tip of the locking catheter.
- a tether (1018) is threaded through three openings in a tip (1022) of a locking catheter (1024), and also is threaded into the shaft (1026) of the locking catheter.
- the tether eventually exits the shaft through an opening in the shaft.
- FIG. 1OD shows a tether (1030) that is threaded into the distal end (1031) of the tip (1034) of a locking catheter (1036), and that extends through the shaft (1040) of the locking catheter, exiting through an opening in the shaft.
- Guide elements can extend through varying lengths of a shaft of a delivery catheter. For example, while the tether in FIG. 1 OD extends through a relatively short length of the catheter shaft, FIG.
- 1 OE shows a tether that extends through a relatively long length of a catheter shaft.
- a tether (1042) is threaded into an opening in a tip (1046) of a locking catheter (1048), and extends through almost the entire length of the shaft (1050) of the locking catheter.
- Tether (1042) exits the shaft through an opening in the proximal end (1051) of the shaft.
- FIG. 1 IA shows a cutting catheter (1100) including a tip portion (1102) and a shaft portion (1104).
- a tether (1106) is threaded through two openings in tip portion (1102).
- a cutting element (1108) is disposed within a lumen of shaft portion (1104), and can be used to cut the tether (e.g., after a cinching procedure has taken place).
- FIG. 1 IB shows a different routing configuration for a tether that is threaded through a cutting catheter. As shown in FIG.
- a cutting catheter (1110) includes a tip portion (1112) and a shaft portion (1114) containing a cutting element (1118).
- a tether (1116) is threaded into tip portion (1112) at its distal end (1119), and through three openings in the tip portion.
- a cutting catheter (1120) includes a tip portion (1122) and a shaft portion (1124).
- a tether (1126) is threaded into the tip portion (1122) at its distal end (1127), and exits the tip portion through an opening that is proximal to distal end (1127).
- a cutting element (1128) is disposed within shaft portion (1124).
- Guide elements can be threaded through different numbers of holes in cutting catheters and/or through different locations in cutting catheters. All of the described threading variations are merely illustrative examples of suitable threading techniques.
- routing configurations for guide elements through locking catheters and cutting catheters have been shown, the routing configurations may be used in other types of catheters as well. Additionally, other routing configurations may be used to thread a guide element through a catheter. As an example, in some variations, a guide element may not be threaded through a tip of a catheter.
- an implant may include one or more anchors, may include a lead or electrode (e.g., a pacing electrode, a diagnostic electrode, an active electrode), or may include any other suitable implant.
- an implant may include a fabric implant, or an annuloplasty ring, alone or in combination with one or more anchors. Additional examples of implants include implants that deliver therapy, such as drug-delivery implants, and implants that telemetry information, such as information about the conditions of the target site. For example, implants may be used to deliver growth factors and/or genetic regenerative factors. Implants are described, for example, in U.S. Pat. App.
Abstract
Description
Claims
Priority Applications (6)
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EP07852809A EP2081627A4 (en) | 2006-10-18 | 2007-10-16 | Methods and devices for catheter advancement and delivery of substances therethrough |
JP2009533354A JP2010506658A (en) | 2006-10-18 | 2007-10-16 | Method and apparatus for catheter advancement and delivery of substances through the catheter |
AU2007313197A AU2007313197B2 (en) | 2006-10-18 | 2007-10-16 | Methods and devices for catheter advancement and delivery of substances therethrough |
EP18167829.3A EP3420921B1 (en) | 2006-10-18 | 2007-10-16 | Devices for catheter advancement and delivery of anchors |
CA2666862A CA2666862C (en) | 2006-10-18 | 2007-10-16 | Methods and devices for catheter advancement and delivery of substances therethrough |
IL198206A IL198206A0 (en) | 2006-10-18 | 2009-04-19 | Methods and devices for catheter advancement and delivery of substances therethrough |
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Also Published As
Publication number | Publication date |
---|---|
AU2018213993B2 (en) | 2020-04-09 |
CA2666862C (en) | 2015-04-14 |
JP2010506658A (en) | 2010-03-04 |
EP2412397A1 (en) | 2012-02-01 |
AU2018213993A1 (en) | 2018-08-23 |
EP2081627A4 (en) | 2010-06-30 |
AU2016266039A1 (en) | 2017-01-12 |
EP3095394B1 (en) | 2018-04-18 |
US8388680B2 (en) | 2013-03-05 |
AU2007313197A1 (en) | 2008-04-24 |
EP2412397B1 (en) | 2016-07-13 |
EP2081627A2 (en) | 2009-07-29 |
IL198206A0 (en) | 2009-12-24 |
EP3420921A1 (en) | 2019-01-02 |
AU2014203477B2 (en) | 2016-09-01 |
AU2016266039B2 (en) | 2018-05-10 |
EP3095394A1 (en) | 2016-11-23 |
WO2008048626A3 (en) | 2008-06-26 |
AU2007313197B2 (en) | 2014-04-03 |
AU2014203477A1 (en) | 2014-07-17 |
US20080172035A1 (en) | 2008-07-17 |
CA2666862A1 (en) | 2008-04-24 |
EP3420921B1 (en) | 2023-06-28 |
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