US20080183187A1 - Direct delivery system for transvascular lead - Google Patents
Direct delivery system for transvascular lead Download PDFInfo
- Publication number
- US20080183187A1 US20080183187A1 US11/669,047 US66904707A US2008183187A1 US 20080183187 A1 US20080183187 A1 US 20080183187A1 US 66904707 A US66904707 A US 66904707A US 2008183187 A1 US2008183187 A1 US 2008183187A1
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- United States
- Prior art keywords
- lead
- retaining structure
- jugular vein
- internal jugular
- catheter
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- GCPUWNGXWQTXSG-UHFFFAOYSA-N CCCC(C)N=O Chemical compound CCCC(C)N=O GCPUWNGXWQTXSG-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/02—Details
- A61N1/04—Electrodes
- A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode
- A61N1/056—Transvascular endocardial electrode systems
- A61N1/057—Anchoring means; Means for fixing the head inside the heart
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/02—Details
- A61N1/04—Electrodes
- A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode
- A61N1/0551—Spinal or peripheral nerve electrodes
- A61N1/0558—Anchoring or fixation means therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
- A61N1/3606—Implantable neurostimulators for stimulating central or peripheral nerve system adapted for a particular treatment
- A61N1/36114—Cardiac control, e.g. by vagal stimulation
Definitions
- the present invention relates to medical electrical leads for nerve or muscle stimulation.
- the present invention more particularly relates to a system for direct delivery of a neurostimulation lead into an internal jugular vein and adjacent to a vagus nerve.
- a significant amount of research has been directed both to the direct and indirect stimulation of nerves including the left and right vagus nerves, the sympathetic and parasympathetic nerves, the phrenic nerve, the sacral nerve, and the cavernous nerve to treat a wide variety of medical, psychiatric, and neurological disorders or conditions. More recently, stimulation of the vagus nerve has been proposed as a method for treating various heart conditions, including heart failure.
- Heart failure is a cardiac condition characterized by a deficiency in the ability of the heart to pump blood throughout the body and high filling pressure causing pulmonary fluid to build up in the lungs.
- nerve stimulating electrodes are cuff- or impalement-type electrodes placed in direct contact with the nerve to be stimulated. These electrodes require surgical implantation and can cause irreversible nerve damage due to swelling or direct mechanical damage to the nerve.
- a less invasive approach is to stimulate the nerve through an adjacent vessel using an intravascular lead.
- a lead including one or more electrodes is inserted into a patient's vasculature and delivered to a site within a vessel adjacent a nerve to be stimulated.
- Intravascular leads can be implanted using an over-the-wire technique where the lead includes a lumen extending the length of the lead and the lead is advanced over a guidewire to the desired location in the vein.
- Current over-the-wire leads however, have lumens extending the length of the lead. This requires threading of the entire lead over the wire and results in a larger than desirable lead diameter.
- the lead generally travels an extensive distance through the vasculature, which requires navigability and flexibility of the lead.
- the invention is a lead delivery system for delivering a neurostimulation lead to a patient's internal jugular vein using a percutaneous stick.
- the system comprises a neurostimulation lead adapted to stimulate a vagus nerve from the internal jugular vein.
- the lead includes a proximal end, a distal end, a generally spiral shaped retaining structure interposed between the proximal and distal ends and configured to retain the lead in the internal jugular vein, an electrode coupled to the retaining structure, and a side port interposed between the retaining structure and the proximal end.
- the side port provides access to a lumen extending from the distal end to the side port.
- a guidewire is sized to fit within the side port and lumen and reduce a force exerted by the retaining structure against the internal jugular vein, thereby allowing rotation of the lead and orientation of the electrode by applying a torque to the lead.
- a catheter has a lumen sized to slideably receive the medical electrical lead and is configured to provide access to the internal jugular vein from the percutaneous stick site.
- the present invention is a lead delivery system for delivering a neurostimulation lead to a patient's internal jugular vein using a percutaneous stick.
- the system comprises a neurostimulation lead adapted to stimulate a vagus nerve from the internal jugular vein, the lead including a proximal end, a distal end, a retaining structure configured to retain the lead in the internal jugular vein interposed between the proximal and distal ends, and a side port interposed between the retaining structure and the proximal end.
- the side port provides access to a lumen extending from the distal end to the side port.
- a guidewire is sized to fit within the side port and lumen and reduce a force exerted by the retaining structure against a surface external to the retaining structure, thereby facilitating advancement and orientation of the lead.
- a catheter has a lumen sized to slideably receive the medical electrical lead and is configured to provide access to the internal jugular vein from the percutaneous stick site.
- the present invention is a method of directly delivering a neurostimulation lead to a patient's internal jugular vein.
- the method comprises inserting a catheter into the internal jugular vein using a percutaneous stick.
- a guidewire is inserted into a side port and through a lumen of a neurostimulation lead.
- the neurostimulation lead includes a proximal end, a distal end, a retaining structure interposed between the proximal and distal ends, and an electrode coupled to the retaining structure.
- the side port is interposed between the retaining structure and the proximal end and the lumen extends from the distal end to the side port.
- a portion of the neurostimulation lead is advanced through the catheter and the lead is oriented to a desired position in the internal jugular vein. The catheter and guidewire are removed.
- FIG. 1 is a schematic view of a patient's upper torso.
- FIG. 2 is a schematic view of a medical electrical lead according to one embodiment of the present invention.
- FIG. 3 is a schematic view of a catheter according to one embodiment of the present invention.
- FIG. 4 is a schematic view of a guidewire according to one embodiment of the present invention.
- FIG. 5 is a schematic view of a guidewire inserted into a medical electrical lead according to one embodiment of the present invention.
- FIG. 6 is a schematic view of a catheter after insertion into an internal jugular vein according to one embodiment of the present invention.
- FIG. 7 is a schematic view of a medical electrical lead and guidewire inserted into a catheter according to one embodiment of the present invention.
- FIG. 8 is a schematic view of a medical electrical lead located in a patient's internal jugular vein after removal of the catheter and guidewire according to one embodiment of the present invention.
- FIG. 9 is a flowchart illustrating an exemplary method of implanting a medical electrical lead into an internal jugular vein according to one embodiment of the present invention.
- FIG. 1 shows a schematic view of a patient's upper torso, including a heart 10 and the veins of the neck 12 and thorax 14 .
- the subclavian veins 16 drain blood from the arms 18 .
- the internal jugular veins 20 drain blood from the head 22 and join the subclavian veins 16 to form the brachiocephalic or innominate veins 24 .
- the union of the brachiocephalic veins 24 forms the superior vena cava 26 , which returns blood from the head 22 , neck 12 , arms 18 , and thorax 14 to the right atrium 28 .
- a vagus nerve 30 is shown adjacent to the right internal jugular vein 20 .
- a stimulating device 32 is located in a subcutaneous pocket near the patient's subclavian vein.
- the stimulating device 32 is connected to a medical electrical lead 40 .
- a portion of the medical electrical lead 40 extends through the internal jugular vein 20 and the remainder is subcutaneously tunneled to the stimulating device 32 .
- the stimulating device 32 provides electrical stimulation to a nerve.
- FIG. 2 is a schematic view of the medical electrical lead 40 of FIG. 1 .
- the medical electrical lead 40 includes a lead body 42 comprised of an electrically insulative material 43 extending from a proximal end 44 to a distal end 46 .
- the proximal end 44 is adapted for connection to the stimulating device 32 using connectors or any other means known in the art.
- a retaining structure 48 adapted to exert a force against a surface external to the retaining structure 48 is located at the distal end 46 .
- the retaining structure 48 exerts a force against the internal jugular vein 20 .
- the retaining structure 48 exerts a force against the catheter 60 .
- the retaining structure 48 exerts a force against both the catheter 60 and the internal jugular vein 20 .
- the force exerted by the retaining structure 48 against the internal jugular vein 20 helps retain the electrodes 50 against the internal jugular vein 20 and adjacent to the vagus nerve 30 .
- the retaining structure 48 also stabilizes the lead 40 within the internal jugular vein 20 .
- the retaining structure 48 has a generally spiral shape. In one embodiment, the retaining structure 48 has a spiral shape as disclosed in U.S. patent application Ser. No. ______, filed ______, ______, 2007, entitled SPIRAL CONFIGURATIONS FOR INTRAVASCULAR LEAD STABILITY, above-incorporated by reference in its entirety. In an alternative embodiment, the retaining structure 48 has the form of a dual spiral as disclosed in U.S. patent application Ser. No. ______, filed ______, ______, 2007, entitled DUAL SPIRAL LEAD CONFIGURATIONS, above-incorporated by reference in its entirety. In another embodiment, the retaining structure 48 has the stent-like structure disclosed in U.S. patent application Ser. No.
- the retaining structure 48 has any shape that retains an electrode against a vessel.
- the retaining structure 48 can be formed using molded silicone parts, metal conductor coils, heat formed polyurethane tubing, or any other method known in the art.
- the retaining structure 48 can have a variety of cross-sectional shapes, including circular or oval.
- the retaining structure 48 is a spiral having a pitch of between approximately 0 and approximately 5 centimeters.
- the retaining structure 48 is a spiral having a diameter of between approximately 5 and approximately 50 millimeters.
- the retaining structure 48 has a length of between approximately 30 and approximately 200 millimeters.
- Electrodes 50 are located at the distal end 46 .
- the electrodes 50 are coupled to the retaining structure 48 .
- the electrodes 50 can provide electrical stimulation, sense electrical activity, or both.
- the lead 40 includes conductive members (not shown) coupling electrodes 50 to the stimulating device 32 .
- the medical electrical lead 40 can include any number of electrodes 50 .
- the electrodes 50 are ring electrodes. In other embodiments, the electrodes have any other configuration known in the art.
- the electrodes 50 are configured according to commonly assigned U.S. patent application Ser. No. ______, filed ______, ______, 2007, entitled ELECTRODE CONFIGURATIONS FOR TRANSVASCULAR NERVE STIMULATION, above-incorporated by reference in its entirety.
- a side port 52 communicates with and provides access to a lumen 54 extending from the distal end 46 to the side port 52 .
- the lumen 54 extends out of the tip 47 of the medical electrical lead 40 and terminates at the side port 52 .
- the lumen 54 extends beyond the side port 52 .
- the lumen 54 extends substantially the length of the medical electrical lead 40 .
- the lumen 54 extends the length of the medical electrical lead 40 .
- the lumen 54 is separate from a lumen formed by a conductive coil member.
- all or a portion of the lumen 54 is formed by a conductive coil member lumen.
- the lumen 54 is formed from multiple serial lumens.
- the lumen 54 can extend through the lead body 42 or through silicone or polyurethane molded parts in the lead 40 .
- the electrodes 50 are ring electrodes having insulated lumens and the lumen 54 is at least partially formed from the insulated electrode lumens. In another embodiment, the electrodes 50 are only partially exposed and the lumen 54 passes through the electrodes 50 .
- the side port 52 is interposed between the retaining structure 48 and the proximal end 44 .
- the side port 52 is located a maximum of approximately 5 centimeters from the retaining structure 48 .
- the lead 40 has a length of between about 40 and about 100 centimeters and a diameter of between about 3 and about 8 French.
- the lumen 54 has a diameter of between about 0.014 and about 0.042 inch.
- FIG. 3 depicts an introducer or catheter 60 used to provide access to the internal jugular vein 20 .
- the catheter 60 has a proximal end 62 , a distal end 64 , and a lumen 66 .
- the catheter 60 is sized to slideably receive the medical electrical lead 40 in the lumen 66 after insertion of the guidewire 70 into the lead 40 (as shown in FIG. 7 ).
- the catheter 60 is configured to provide access to the internal jugular vein 20 via percutaneous stick.
- the catheter 60 can be made of a polytetrafluoroethylene (PTFE) or fluoronated ethylene propylene (FEP) inner lining, a 304 V stainless steel braiding, and an outer jacket of Pebax and/or Nylon.
- PTFE polytetrafluoroethylene
- FEP fluoronated ethylene propylene
- Tungsten wire can optionally be added to the stainless steel braiding to improve radiopacity of the catheter.
- the catheter 60 is made out of any other material known in the art.
- the catheter 60 has a length of between about 10 and about 20 centimeters, an outer diameter of between about 6 and about 14 French, and an inner diameter that is slightly smaller than the outer diameter.
- the inner diameter is about 0.020 inch smaller than the outer diameter.
- FIG. 4 depicts a guidewire 70 according to one embodiment of the present invention.
- the guidewire 70 has a proximal end 74 , a distal end 76 , and a distal tip 78 .
- the guidewire 70 allows a clinician to introduce and position a medical electrical lead 40 in a patient.
- the guidewire 70 has a core (not shown), and includes a coating, for example, a hydrophilic coating.
- the wire core is made from nickel/titanium.
- the wire core is made from stainless steel.
- the wire core is made from any other metal known in the art.
- the guidewire 70 has an outer diameter that allows it to slide into the side port 52 and through the lumen 54 of the medical electrical lead 40 .
- the guidewire 70 has a diameter of between approximately 0.012 and approximately 0.040 inch.
- the guidewire 70 includes a grind profile. In one embodiment, the grind profile is parabolic. In another embodiment, the guidewire 70 has a length of between about 10 and about 40 centimeters.
- FIG. 5 illustrates the medical electrical lead 40 after insertion of the guidewire 70 into the side port 52 and lumen 54 .
- the lead 40 is advanced over the guidewire 70 during implantation.
- the guidewire 70 straightens the retaining structure 48 enough to reduce the force exerted on the internal jugular vein 20 by the retaining structure 48 , thereby facilitating implantation of the lead 40 .
- the medical electrical lead 40 is shown as straight after the insertion of the guidewire 70 in the illustrated embodiment, in another embodiment, the guidewire 70 does not completely straighten the retaining structure 48 .
- the guidewire 70 is used to advance the medical electrical lead 40 through the catheter 60 and to a desired location in the internal jugular vein 20 .
- FIG. 6 is a schematic view showing the catheter 60 inserted into the internal jugular vein 20 .
- the catheter 60 provides access to the internal jugular vein 20 for the lead 40 .
- FIG. 7 is a cutaway view showing the medical electrical lead 40 and guidewire 70 after advancement through the catheter 60 and into the internal jugular vein 20 .
- the retaining structure 48 retains the distal end 46 of the lead 40 in the internal jugular vein 20 .
- the retaining structure 48 retains the electrodes 50 in a location adjacent to the vagus nerve 30 .
- the remainder of the medical electrical lead 40 is subcutaneously tunneled to the stimulating device 32 .
- a suture 80 secures the distal end 46 of the medical electrical lead 40 at the site of the percutaneous stick.
- a suture sleeve (not shown) can be used to protect the lead body 42 when using a suture 80 to secure the distal end 46 .
- an anchor or any other securing means known in the art is used to secure the proximal end 46 of the medical electrical lead 40 .
- FIG. 9 depicts an exemplary method 900 for implanting a medical electrical lead 40 .
- a catheter 60 is inserted into the internal jugular vein 20 using a percutaneous stick (block 910 ).
- a guidewire 70 (or stylet) is inserted into the side port 52 and through the lumen 54 of the medical electrical lead 40 (block 920 ).
- the lead 40 is advanced through the catheter 60 into the internal jugular vein 20 and oriented to a desired position (block 930 ).
- the guidewire 70 and catheter 60 are then removed (block 940 ).
- the lead 40 is advanced over the guidewire 70 and through the catheter 60 .
- the lead 40 and the guidewire 70 are advanced through the catheter 60 together.
- the lead 40 can be advanced and oriented to a desired position in a number of ways.
- a portion of the retaining structure 48 is retained in the catheter 60 and the retaining structure 48 exerts a force against the catheter 60 .
- the lead 40 can be oriented by applying a torque to the catheter 40 or to the lead body 42 .
- the entire retaining structure 48 is retained in the catheter 60 and the lead 40 is oriented by applying a torque to the catheter 40 or to the lead body 42 .
- a guidewire 70 inserted into the side port 52 and lumen 54 of the lead 40 straightens the retaining structure 48 to reduce the force exerted by the retaining structure 48 on the catheter 60 .
- This force reduction facilitates advancement of the lead 40 through the catheter 60 and the internal jugular vein 20 .
- the force reduction also facilitates orientation of the lead 40 in the internal jugular vein 20 .
- the lead 40 is advanced and oriented so that the electrodes 50 are adjacent to the vagus nerve 30 .
- the retaining structure 48 extends beyond the distal end 64 of the catheter.
- the lead 40 is oriented by applying a torque to the lead body 42 .
- the guidewire 70 is used to reduce the force exerted by the retaining structure 48 on the internal jugular vein 20 during implantation of the lead 40 .
- the guidewire 70 is retracted from the retaining structure 48 , yet remains in a portion of the lumen 54 , thereby allowing for additional manipulation of the lead 40 using the guidewire 70 .
- removal of the catheter 60 allows the retaining structure 48 to further expand, causing the retaining structure 48 to exert a greater force against the internal jugular vein 20 .
- the catheter 60 is split or peeled apart for removal.
- the catheter 60 is slid over the medical electrical lead 40 .
- a stylet is inserted into the lumen 54 instead of a guidewire 70 .
- the lumen 54 does not extend out of the tip 47 of the medical electrical lead 40 and a stylet (not shown) is used to push the lead 40 to the desired position in the internal jugular vein 20 .
- the method 900 includes securing the distal end 46 of the lead 40 at the stick site using a suture 80 .
- the remainder of the lead 40 is subcutaneously tunneled to a stimulating device 32 .
- the invention allows for direct delivery of the medical electrical lead 40 into the internal jugular vein 20 without threading the guidewire 70 through the entire length of the lead 40 . It is easier to exchange guidewires 70 , if necessary, because the guidewire 70 is not threaded through the entire length of the lead 40 . Additionally, the lead 40 is more easily turned because instead of turning the entire length of the lead 40 , a shorter length may be turned. In one embodiment, the lead 40 is turned by applying a torque to the lead body 42 at a region near the side port 52 .
- the medical electrical lead 40 can include any number of conductors, electrodes, terminal connectors, and insulators, and can be used with any combination of catheters, introducers, guidewires, and stylets.
Abstract
A lead delivery system for delivering a neurostimulation lead to a patient's internal jugular vein using a percutaneous stick. The system comprises a neurostimulation lead adapted to stimulate a vagus nerve from the internal jugular vein. The lead includes a proximal end, a distal end, a generally spiral shaped retaining structure interposed between the proximal and distal ends and configured to retain the lead in the internal jugular vein, an electrode coupled to the retaining structure, and a side port interposed between the retaining structure and the proximal end. The side port provides access to a lumen extending from the distal end to the side port. A guidewire is sized to fit within the side port and lumen and reduce a force exerted by the retaining structure against the internal jugular vein, thereby allowing rotation of the lead and orientation of the electrode by applying a torque to the lead. A catheter has a lumen sized to slideably receive the medical electrical lead and configured to provide access to the internal jugular vein from the percutaneous stick site. A method of delivering a medical electrical lead to a patient's internal jugular vein.
Description
- This application is related to the following co-pending and co-owned applications: DUAL SPIRAL LEAD CONFIGURATIONS, filed on the same day and assigned Ser. No. ______; ELECTRODE CONFIGURATIONS FOR TRANSVASCULAR NERVE STIMULATION, filed on the same day and assigned Ser. No. ______; SPIRAL CONFIGURATIONS FOR INTRAVASCULAR LEAD STABILITY, filed on the same day and assigned Ser. No. ______; METHOD AND APPARATUS FOR DELIVERING A TRANSVASCULAR LEAD, filed on the same day and assigned Ser. No. ______; NEUROSTIMULATING LEAD HAVING A STENT-LIKE ANCHOR, filed on the same day and assigned Ser. No. ______; TRANSVASCULAR LEAD WITH PROXIMAL FORCE RELIEF, filed on the same day and assigned Ser. No. ______; and SIDE PORT LEAD DELIVERY SYSTEM, filed on the same day and assigned Ser. No. ______, all herein incorporated by reference in their entirety.
- The present invention relates to medical electrical leads for nerve or muscle stimulation. The present invention more particularly relates to a system for direct delivery of a neurostimulation lead into an internal jugular vein and adjacent to a vagus nerve.
- A significant amount of research has been directed both to the direct and indirect stimulation of nerves including the left and right vagus nerves, the sympathetic and parasympathetic nerves, the phrenic nerve, the sacral nerve, and the cavernous nerve to treat a wide variety of medical, psychiatric, and neurological disorders or conditions. More recently, stimulation of the vagus nerve has been proposed as a method for treating various heart conditions, including heart failure. Heart failure is a cardiac condition characterized by a deficiency in the ability of the heart to pump blood throughout the body and high filling pressure causing pulmonary fluid to build up in the lungs.
- Typically, nerve stimulating electrodes are cuff- or impalement-type electrodes placed in direct contact with the nerve to be stimulated. These electrodes require surgical implantation and can cause irreversible nerve damage due to swelling or direct mechanical damage to the nerve. A less invasive approach is to stimulate the nerve through an adjacent vessel using an intravascular lead. A lead including one or more electrodes is inserted into a patient's vasculature and delivered to a site within a vessel adjacent a nerve to be stimulated.
- Intravascular leads can be implanted using an over-the-wire technique where the lead includes a lumen extending the length of the lead and the lead is advanced over a guidewire to the desired location in the vein. Current over-the-wire leads, however, have lumens extending the length of the lead. This requires threading of the entire lead over the wire and results in a larger than desirable lead diameter. Furthermore, the lead generally travels an extensive distance through the vasculature, which requires navigability and flexibility of the lead. Thus, there is a need in the art for an intravascular medical electrical lead that can be implanted using an over-the-wire technique, yet does not require a lumen extending the length of the lead. There is also a need in the art for a lead that can be delivered directly to a desired location in the vasculature.
- In one embodiment, the invention is a lead delivery system for delivering a neurostimulation lead to a patient's internal jugular vein using a percutaneous stick. The system comprises a neurostimulation lead adapted to stimulate a vagus nerve from the internal jugular vein. The lead includes a proximal end, a distal end, a generally spiral shaped retaining structure interposed between the proximal and distal ends and configured to retain the lead in the internal jugular vein, an electrode coupled to the retaining structure, and a side port interposed between the retaining structure and the proximal end. The side port provides access to a lumen extending from the distal end to the side port. A guidewire is sized to fit within the side port and lumen and reduce a force exerted by the retaining structure against the internal jugular vein, thereby allowing rotation of the lead and orientation of the electrode by applying a torque to the lead. A catheter has a lumen sized to slideably receive the medical electrical lead and is configured to provide access to the internal jugular vein from the percutaneous stick site.
- In another embodiment, the present invention is a lead delivery system for delivering a neurostimulation lead to a patient's internal jugular vein using a percutaneous stick. The system comprises a neurostimulation lead adapted to stimulate a vagus nerve from the internal jugular vein, the lead including a proximal end, a distal end, a retaining structure configured to retain the lead in the internal jugular vein interposed between the proximal and distal ends, and a side port interposed between the retaining structure and the proximal end. The side port provides access to a lumen extending from the distal end to the side port. A guidewire is sized to fit within the side port and lumen and reduce a force exerted by the retaining structure against a surface external to the retaining structure, thereby facilitating advancement and orientation of the lead. A catheter has a lumen sized to slideably receive the medical electrical lead and is configured to provide access to the internal jugular vein from the percutaneous stick site.
- In another embodiment, the present invention is a method of directly delivering a neurostimulation lead to a patient's internal jugular vein. The method comprises inserting a catheter into the internal jugular vein using a percutaneous stick. A guidewire is inserted into a side port and through a lumen of a neurostimulation lead. The neurostimulation lead includes a proximal end, a distal end, a retaining structure interposed between the proximal and distal ends, and an electrode coupled to the retaining structure. The side port is interposed between the retaining structure and the proximal end and the lumen extends from the distal end to the side port. A portion of the neurostimulation lead is advanced through the catheter and the lead is oriented to a desired position in the internal jugular vein. The catheter and guidewire are removed.
- While multiple embodiments are disclosed, still other embodiments of the present invention will become apparent to those skilled in the art from the following detailed description, which shows and describes illustrative embodiments of the invention. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive.
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FIG. 1 is a schematic view of a patient's upper torso. -
FIG. 2 is a schematic view of a medical electrical lead according to one embodiment of the present invention. -
FIG. 3 is a schematic view of a catheter according to one embodiment of the present invention. -
FIG. 4 is a schematic view of a guidewire according to one embodiment of the present invention. -
FIG. 5 is a schematic view of a guidewire inserted into a medical electrical lead according to one embodiment of the present invention. -
FIG. 6 is a schematic view of a catheter after insertion into an internal jugular vein according to one embodiment of the present invention. -
FIG. 7 is a schematic view of a medical electrical lead and guidewire inserted into a catheter according to one embodiment of the present invention. -
FIG. 8 is a schematic view of a medical electrical lead located in a patient's internal jugular vein after removal of the catheter and guidewire according to one embodiment of the present invention. -
FIG. 9 is a flowchart illustrating an exemplary method of implanting a medical electrical lead into an internal jugular vein according to one embodiment of the present invention. - While the invention is amenable to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and are described in detail below. The intention, however, is not to limit the invention to the particular embodiments described. On the contrary, the invention is intended to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
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FIG. 1 shows a schematic view of a patient's upper torso, including aheart 10 and the veins of theneck 12 andthorax 14. Thesubclavian veins 16 drain blood from thearms 18. The internaljugular veins 20 drain blood from thehead 22 and join thesubclavian veins 16 to form the brachiocephalic orinnominate veins 24. The union of thebrachiocephalic veins 24 forms thesuperior vena cava 26, which returns blood from thehead 22,neck 12,arms 18, andthorax 14 to theright atrium 28. Avagus nerve 30 is shown adjacent to the right internaljugular vein 20. Another vagus nerve (not shown) is adjacent to the left internaljugular vein 20. A stimulatingdevice 32 is located in a subcutaneous pocket near the patient's subclavian vein. The stimulatingdevice 32 is connected to a medicalelectrical lead 40. A portion of the medicalelectrical lead 40 extends through the internaljugular vein 20 and the remainder is subcutaneously tunneled to the stimulatingdevice 32. In one embodiment, the stimulatingdevice 32 provides electrical stimulation to a nerve. -
FIG. 2 is a schematic view of the medicalelectrical lead 40 ofFIG. 1 . The medicalelectrical lead 40 includes alead body 42 comprised of anelectrically insulative material 43 extending from aproximal end 44 to adistal end 46. Theproximal end 44 is adapted for connection to the stimulatingdevice 32 using connectors or any other means known in the art. A retainingstructure 48 adapted to exert a force against a surface external to the retainingstructure 48 is located at thedistal end 46. In one embodiment, the retainingstructure 48 exerts a force against the internaljugular vein 20. In another embodiment, the retainingstructure 48 exerts a force against thecatheter 60. In yet another embodiment, the retainingstructure 48 exerts a force against both thecatheter 60 and the internaljugular vein 20. The force exerted by the retainingstructure 48 against the internaljugular vein 20 helps retain theelectrodes 50 against the internaljugular vein 20 and adjacent to thevagus nerve 30. The retainingstructure 48 also stabilizes thelead 40 within the internaljugular vein 20. - In the illustrated embodiment, the retaining
structure 48 has a generally spiral shape. In one embodiment, the retainingstructure 48 has a spiral shape as disclosed in U.S. patent application Ser. No. ______, filed ______, ______, 2007, entitled SPIRAL CONFIGURATIONS FOR INTRAVASCULAR LEAD STABILITY, above-incorporated by reference in its entirety. In an alternative embodiment, the retainingstructure 48 has the form of a dual spiral as disclosed in U.S. patent application Ser. No. ______, filed ______, ______, 2007, entitled DUAL SPIRAL LEAD CONFIGURATIONS, above-incorporated by reference in its entirety. In another embodiment, the retainingstructure 48 has the stent-like structure disclosed in U.S. patent application Ser. No. ______, filed ______, ______, 2007, entitled NEUROSTIMULATING LEAD HAVING A STENT-LIKE ANCHOR, above-incorporated by reference in its entirety. In other embodiments, the retainingstructure 48 has any shape that retains an electrode against a vessel. - The retaining
structure 48 can be formed using molded silicone parts, metal conductor coils, heat formed polyurethane tubing, or any other method known in the art. The retainingstructure 48 can have a variety of cross-sectional shapes, including circular or oval. In one embodiment, the retainingstructure 48 is a spiral having a pitch of between approximately 0 and approximately 5 centimeters. In an alternative embodiment, the retainingstructure 48 is a spiral having a diameter of between approximately 5 and approximately 50 millimeters. In another alternative embodiment, the retainingstructure 48 has a length of between approximately 30 and approximately 200 millimeters. -
Electrodes 50 are located at thedistal end 46. In the embodiment shown inFIG. 2 , theelectrodes 50 are coupled to the retainingstructure 48. Theelectrodes 50 can provide electrical stimulation, sense electrical activity, or both. Thelead 40 includes conductive members (not shown)coupling electrodes 50 to the stimulatingdevice 32. Although twoelectrodes 50 are shown inFIG. 2 , the medicalelectrical lead 40 can include any number ofelectrodes 50. In the embodiment illustrated inFIG. 2 , theelectrodes 50 are ring electrodes. In other embodiments, the electrodes have any other configuration known in the art. In one embodiment, theelectrodes 50 are configured according to commonly assigned U.S. patent application Ser. No. ______, filed ______, ______, 2007, entitled ELECTRODE CONFIGURATIONS FOR TRANSVASCULAR NERVE STIMULATION, above-incorporated by reference in its entirety. - A
side port 52 communicates with and provides access to alumen 54 extending from thedistal end 46 to theside port 52. As shown inFIG. 2 , thelumen 54 extends out of thetip 47 of the medicalelectrical lead 40 and terminates at theside port 52. In another embodiment, thelumen 54 extends beyond theside port 52. In another embodiment, thelumen 54 extends substantially the length of the medicalelectrical lead 40. In yet another embodiment, thelumen 54 extends the length of the medicalelectrical lead 40. In one embodiment, thelumen 54 is separate from a lumen formed by a conductive coil member. In another embodiment, all or a portion of thelumen 54 is formed by a conductive coil member lumen. In yet another embodiment, thelumen 54 is formed from multiple serial lumens. Thelumen 54 can extend through thelead body 42 or through silicone or polyurethane molded parts in thelead 40. In one embodiment, theelectrodes 50 are ring electrodes having insulated lumens and thelumen 54 is at least partially formed from the insulated electrode lumens. In another embodiment, theelectrodes 50 are only partially exposed and thelumen 54 passes through theelectrodes 50. - The
side port 52 is interposed between the retainingstructure 48 and theproximal end 44. In one embodiment, theside port 52 is located a maximum of approximately 5 centimeters from the retainingstructure 48. In one embodiment, thelead 40 has a length of between about 40 and about 100 centimeters and a diameter of between about 3 and about 8 French. In one embodiment, thelumen 54 has a diameter of between about 0.014 and about 0.042 inch. -
FIG. 3 depicts an introducer orcatheter 60 used to provide access to the internaljugular vein 20. Thecatheter 60 has aproximal end 62, adistal end 64, and alumen 66. Thecatheter 60 is sized to slideably receive the medicalelectrical lead 40 in thelumen 66 after insertion of theguidewire 70 into the lead 40 (as shown inFIG. 7 ). In one embodiment, thecatheter 60 is configured to provide access to the internaljugular vein 20 via percutaneous stick. Thecatheter 60 can be made of a polytetrafluoroethylene (PTFE) or fluoronated ethylene propylene (FEP) inner lining, a 304 V stainless steel braiding, and an outer jacket of Pebax and/or Nylon. Tungsten wire can optionally be added to the stainless steel braiding to improve radiopacity of the catheter. In other embodiments, thecatheter 60 is made out of any other material known in the art. In one embodiment, thecatheter 60 has a length of between about 10 and about 20 centimeters, an outer diameter of between about 6 and about 14 French, and an inner diameter that is slightly smaller than the outer diameter. In one embodiment, the inner diameter is about 0.020 inch smaller than the outer diameter. -
FIG. 4 depicts aguidewire 70 according to one embodiment of the present invention. In the illustrated embodiment, theguidewire 70 has aproximal end 74, adistal end 76, and adistal tip 78. Theguidewire 70 allows a clinician to introduce and position a medicalelectrical lead 40 in a patient. In one embodiment, theguidewire 70 has a core (not shown), and includes a coating, for example, a hydrophilic coating. In one embodiment, the wire core is made from nickel/titanium. In an alternative embodiment, the wire core is made from stainless steel. In yet another alternative embodiment, the wire core is made from any other metal known in the art. Theguidewire 70 has an outer diameter that allows it to slide into theside port 52 and through thelumen 54 of the medicalelectrical lead 40. In one embodiment, theguidewire 70 has a diameter of between approximately 0.012 and approximately 0.040 inch. In one embodiment, theguidewire 70 includes a grind profile. In one embodiment, the grind profile is parabolic. In another embodiment, theguidewire 70 has a length of between about 10 and about 40 centimeters. -
FIG. 5 illustrates the medicalelectrical lead 40 after insertion of theguidewire 70 into theside port 52 andlumen 54. In one embodiment, thelead 40 is advanced over theguidewire 70 during implantation. In another embodiment, theguidewire 70 straightens the retainingstructure 48 enough to reduce the force exerted on the internaljugular vein 20 by the retainingstructure 48, thereby facilitating implantation of thelead 40. Although the medicalelectrical lead 40 is shown as straight after the insertion of theguidewire 70 in the illustrated embodiment, in another embodiment, theguidewire 70 does not completely straighten the retainingstructure 48. Theguidewire 70 is used to advance the medicalelectrical lead 40 through thecatheter 60 and to a desired location in the internaljugular vein 20. -
FIG. 6 is a schematic view showing thecatheter 60 inserted into the internaljugular vein 20. Thecatheter 60 provides access to the internaljugular vein 20 for thelead 40.FIG. 7 is a cutaway view showing the medicalelectrical lead 40 and guidewire 70 after advancement through thecatheter 60 and into the internaljugular vein 20. As shown inFIG. 8 , after thecatheter 60 and guidewire 70 are removed, the retainingstructure 48 retains thedistal end 46 of thelead 40 in the internaljugular vein 20. In one embodiment, the retainingstructure 48 retains theelectrodes 50 in a location adjacent to thevagus nerve 30. In one embodiment, the remainder of the medicalelectrical lead 40 is subcutaneously tunneled to the stimulatingdevice 32. - In one embodiment, a
suture 80 secures thedistal end 46 of the medicalelectrical lead 40 at the site of the percutaneous stick. In another embodiment, a suture sleeve (not shown) can be used to protect thelead body 42 when using asuture 80 to secure thedistal end 46. In yet another embodiment, an anchor or any other securing means known in the art is used to secure theproximal end 46 of the medicalelectrical lead 40. -
FIG. 9 depicts anexemplary method 900 for implanting a medicalelectrical lead 40. Acatheter 60 is inserted into the internaljugular vein 20 using a percutaneous stick (block 910). A guidewire 70 (or stylet) is inserted into theside port 52 and through thelumen 54 of the medical electrical lead 40 (block 920). Thelead 40 is advanced through thecatheter 60 into the internaljugular vein 20 and oriented to a desired position (block 930). Theguidewire 70 andcatheter 60 are then removed (block 940). In one embodiment, thelead 40 is advanced over theguidewire 70 and through thecatheter 60. In another embodiment, thelead 40 and theguidewire 70 are advanced through thecatheter 60 together. - The
lead 40 can be advanced and oriented to a desired position in a number of ways. For example, in one embodiment, a portion of the retainingstructure 48 is retained in thecatheter 60 and the retainingstructure 48 exerts a force against thecatheter 60. Thelead 40 can be oriented by applying a torque to thecatheter 40 or to thelead body 42. In another embodiment, theentire retaining structure 48 is retained in thecatheter 60 and thelead 40 is oriented by applying a torque to thecatheter 40 or to thelead body 42. In yet another embodiment, aguidewire 70 inserted into theside port 52 andlumen 54 of thelead 40 straightens the retainingstructure 48 to reduce the force exerted by the retainingstructure 48 on thecatheter 60. This force reduction facilitates advancement of thelead 40 through thecatheter 60 and the internaljugular vein 20. The force reduction also facilitates orientation of thelead 40 in the internaljugular vein 20. In one embodiment, thelead 40 is advanced and oriented so that theelectrodes 50 are adjacent to thevagus nerve 30. - In another embodiment, the retaining
structure 48 extends beyond thedistal end 64 of the catheter. Thelead 40 is oriented by applying a torque to thelead body 42. In one embodiment, theguidewire 70 is used to reduce the force exerted by the retainingstructure 48 on the internaljugular vein 20 during implantation of thelead 40. In another embodiment, theguidewire 70 is retracted from the retainingstructure 48, yet remains in a portion of thelumen 54, thereby allowing for additional manipulation of thelead 40 using theguidewire 70. - In one embodiment, removal of the
catheter 60 allows the retainingstructure 48 to further expand, causing the retainingstructure 48 to exert a greater force against the internaljugular vein 20. In one embodiment, thecatheter 60 is split or peeled apart for removal. In another embodiment, thecatheter 60 is slid over the medicalelectrical lead 40. In one embodiment, a stylet is inserted into thelumen 54 instead of aguidewire 70. In another embodiment, thelumen 54 does not extend out of thetip 47 of the medicalelectrical lead 40 and a stylet (not shown) is used to push thelead 40 to the desired position in the internaljugular vein 20. In yet another embodiment, themethod 900 includes securing thedistal end 46 of thelead 40 at the stick site using asuture 80. In another embodiment, the remainder of thelead 40 is subcutaneously tunneled to a stimulatingdevice 32. - The invention allows for direct delivery of the medical
electrical lead 40 into the internaljugular vein 20 without threading theguidewire 70 through the entire length of thelead 40. It is easier to exchangeguidewires 70, if necessary, because theguidewire 70 is not threaded through the entire length of thelead 40. Additionally, thelead 40 is more easily turned because instead of turning the entire length of thelead 40, a shorter length may be turned. In one embodiment, thelead 40 is turned by applying a torque to thelead body 42 at a region near theside port 52. - Although the present invention has been described in reference to an internal jugular vein, the invention could also be used to implant a lead 40 in any vessel, such as a vein, artery, lymphatic duct, bile duct, for the purposes of nerve or muscle stimulation. The medical
electrical lead 40 can include any number of conductors, electrodes, terminal connectors, and insulators, and can be used with any combination of catheters, introducers, guidewires, and stylets. - Various modifications and additions can be made to the exemplary embodiments discussed without departing from the scope of the present invention. For example, while the embodiments described above refer to particular features, the scope of this invention also includes embodiments having different combinations of features and embodiments that do not include all of the described features. Accordingly, the scope of the present invention is intended to embrace all such alternatives, modifications, and variations as fall within the scope of the claims, together with all equivalents thereof.
Claims (20)
1. A lead delivery system for delivering a neurostimulation lead to a patient's internal jugular vein using a percutaneous stick, the system comprising:
a neurostimulation lead adapted to stimulate a vagus nerve from the internal jugular vein, the lead including a proximal end, a distal end, a generally spiral shaped retaining structure interposed between the proximal and distal ends and configured to retain the lead in the internal jugular vein, an electrode coupled to the retaining structure, and a side port interposed between the retaining structure and the proximal end, the side port providing access to a lumen extending from the distal end to the side port;
a guidewire sized to fit within the side port and lumen and reduce a force exerted by the retaining structure against the internal jugular vein, thereby allowing rotation of the lead and orientation of the electrode by applying a torque to the lead; and
a catheter having a lumen sized to slideably receive the medical electrical lead and configured to provide access to the internal jugular vein from the percutaneous stick site.
2. The lead delivery system of claim 1 wherein the distance between the side port and the generally spiral shaped retaining structure is a maximum of approximately 5 centimeters.
3. The lead delivery system of claim 1 wherein the lumen extends beyond the side port.
4. The lead of claim 1 wherein the generally spiral shaped retaining structure has a diameter of between approximately 5 and approximately 50 millimeters.
5. The lead of claim 1 wherein the generally spiral shaped retaining structure has a length of between approximately 30 and approximately 200 millimeters.
6. The lead of claim 1 wherein the generally spiral shaped retaining structure has a pitch of between approximately 0 centimeters and approximately 5 centimeters.
7. The lead delivery system of claim 1 wherein the neurostimulation lead has a diameter of between approximately 3 and approximately 8 French.
8. The lead delivery system of claim 1 wherein the lumen has a diameter of between approximately 0.014 and approximately 0.042 inch.
9. The lead delivery system of claim 1 wherein the catheter has a length of between approximately 10 and approximately 20 centimeters.
10. The lead delivery system of claim 1 wherein the guidewire has a diameter of between approximately 0.012 and approximately 0.040 inch and a length of between approximately 10 and approximately 40 centimeters.
11. A lead delivery system for delivering a neurostimulation lead to a patient's internal jugular vein using a percutaneous stick, the system comprising:
a neurostimulation lead adapted to stimulate a vagus nerve from the internal jugular vein, the lead including a proximal end, a distal end, a retaining structure configured to retain the lead in the internal jugular vein interposed between the proximal and distal ends, and a side port interposed between the retaining structure and the proximal end, the side port providing access to a lumen extending from the distal end to the side port;
a guidewire sized to fit within the side port and lumen and reduce a force exerted by the retaining structure against a surface external to the retaining structure, thereby facilitating advancement and orientation of the lead; and
a catheter having a lumen sized to slideably receive the medical electrical lead and configured to provide access to the internal jugular vein from the percutaneous stick site.
12. The lead delivery system of claim 11 wherein the surface external to the retaining structure is the catheter.
13. The lead delivery system of claim 11 wherein the surface external to the retaining structure is the internal jugular vein.
14. The lead delivery system of claim 11 wherein the retaining structure has a spiral, dual spiral, or stent-like structure.
15. A method of directly delivering a neurostimulation lead to a patient's internal jugular vein, the method comprising:
inserting a catheter into the internal jugular vein using a percutaneous stick;
inserting a guidewire into a side port and through a lumen of a neurostimulation lead, the neurostimulation lead including a proximal end, a distal end, a retaining structure interposed between the proximal and distal ends, and an electrode coupled to the retaining structure, wherein the side port is interposed between the retaining structure and the proximal end and the lumen extends from the distal end to the side port;
advancing a portion of the neurostimulation lead through the catheter and orienting the lead to a desired position in the internal jugular vein; and
removing the catheter and the guidewire.
16. The method of claim 15 wherein advancing a portion of the neurostimulation lead comprises retaining a portion of the retaining structure in the catheter and orienting the lead comprises turning the catheter.
17. The method of claim 15 wherein advancing a portion of the neurostimulation lead comprises retaining all of the retaining structure in the catheter and orienting the lead comprises turning the catheter.
18. The method of claim 15 wherein advancing a portion of the neurostimulation lead comprises advancing the retaining structure beyond a distal end of the catheter and orienting the lead comprises turning the lead.
19. The method of claim 15 further comprising reducing a force exerted by the retaining structure against a surface external to the retaining structure by inserting the guidewire through the lumen.
20. The method of claim 15 wherein orienting the lead comprises orienting the electrode so the electrode is adjacent to a vagus nerve.
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US13/079,512 US8311647B2 (en) | 2007-01-30 | 2011-04-04 | Direct delivery system for transvascular lead |
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US20110178530A1 (en) | 2011-07-21 |
WO2008094350A1 (en) | 2008-08-07 |
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