Filtered feedthrough for an implantable medical device
First Claim
1. A cardiac pacing system, comprising:
- a pulse generator including a housing and electronics within the housing;
a lead attached to said pulse generator; and
a capacitive filter for filtering out electromagnetic interference, said capacitive filter mounted outside of the housing of the pulse generator and connected to the lead to substantially reduce electromagnetic interference entering the housing.
1 Assignment
0 Petitions
Accused Products
Abstract
A cardiac pacing system comprises a pulse generator which includes a housing. Electronics are placed within the housing. Attached to the pulse generator is a lead. The lead has electrodes which are attached to the surface of the heart. The lead carries signals to and from the heart. The electronics use the signals from the heart to make decisions regarding signals to send to the heart to correct for various arrhythmias. A capacitive filter for filtering out electromagnetic interference is positioned on the lead so that unfiltered electromagnetic interference remains outside the housing of the pulse generator. The capacitor can be positioned outside the housing or positioned within a ferrule in an opening of the housing.
109 Citations
46 Claims
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1. A cardiac pacing system, comprising:
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a pulse generator including a housing and electronics within the housing; a lead attached to said pulse generator; and a capacitive filter for filtering out electromagnetic interference, said capacitive filter mounted outside of the housing of the pulse generator and connected to the lead to substantially reduce electromagnetic interference entering the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 23, 24, 25, 26, 27, 28)
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11. A capacitor for use as a feedthrough filter for a heart pacing device and adapted for implantation in a human body, said capacitor comprising:
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a first set of one or more plates; and a second set of one or more plates spaced away from the first set of plates; and a capacitor housing having said first set of plates and said second set of plates positioned therein, said housing comprising a biocompatible material. - View Dependent Claims (12)
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13. A lead portion adapted for connection to a pulse generator of a pacing system, said lead portion comprising:
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a conductor having a first end and a second end; a connector terminal connected to one of said first or second ends, the other of said first or second ends adapted to connect to the pulse generator; and a capacitor electrically connected to the conductor and a housing of the pulse generator and positioned on the lead portion outside of the housing of the pulse generator such that electromagnetic interference remains substantially outside the housing of the pulse generator. - View Dependent Claims (14)
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15. A cardiac pacing system, comprising:
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a pulse generator further comprising a housing and electronics within the housing; a lead attached to said pulse generator; and a capacitive filter positioned outside of the housing of the pulse generator on the lead attached to the pulse generator. - View Dependent Claims (16)
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17. An implantable device, comprising:
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a pulse generator including a housing and electronics within the housing, the housing having an opening; and a filtered feedthrough, including; a feedthrough wire providing an electrical connection to the electronics, the electrical connection external to the housing; and a capacitor adapted to substantially seal an opening in the housing, the capacitor electrically connected to the housing and electrically connected to the feedthrough wire to substantially prevent electromagnetic interference from interfering with the electronics. - View Dependent Claims (18, 19, 20, 21, 22)
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29. An implantable device, comprising:
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a pulse generator including a housing; electronics disposed within the housing; a filtered feedthrough including a feedthrough wire and a capacitor; the feedthrough wire providing an electrical connection to the electronics, the electrical connection external to the housing; the capacitor electrically connected to the housing and electrically connected to the feedthrough wire to substantially prevent electromagnetic interference from interfering with the electronics; and the capacitor mounted outside of the housing of the pulse generator. - View Dependent Claims (30, 31, 32, 33)
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34. A cardiac pacing system, comprising:
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a pulse generator including a housing and electronics within the housing; a lead attached to said pulse generator; a capacitive filter for filtering out electromagnetic interference, said capacitive filter mounted outside of the housing of the pulse generator and connected to the lead to substantially reduce electromagnetic interference entering the housing; and wherein the capacitive filter is substantially covered with a biocompatible material.
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35. A cardiac pacing system, comprising:
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a pulse generator including a housing and electronics within the housing; a lead attached to said pulse generator; a capacitive filter for filtering out electromagnetic interference, said capacitive filter mounted outside of the housing of the pulse generator and connected to the lead to substantially reduce electromagnetic interference entering the housing; and wherein the housing of the pulse generator has an opening therein, the housing further comprising a ferrule positioned within an opening of the housing, the ferrule including a capacitive filter. - View Dependent Claims (36)
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37. A cardiac pacing system, comprising:
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a pulse generator including a housing and electronics within the housing; a lead attached to said pulse generator; a capacitive filter for filtering out electromagnetic interference, said capacitive filter mounted outside of the housing of the pulse generator and connected to the lead to substantially reduce electromagnetic interference entering the housing; and the capacitive filter comprising a first set of plates electrically connected to the housing of the pulse generator; and
a second set of plates electrically connected to the lead.
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38. A cardiac pacing system, comprising:
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a pulse generator further comprising a housing and electronics within the housing; a lead attached to said pulse generator; a capacitive filter positioned outside of the housing of the pulse generator on the lead attached to the pulse generator; and a connector terminal positioned outside of the housing of the pulse generator, said capacitive filter positioned between the housing of the pulse generator and the connector terminal.
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39. An implantable device, comprising:
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a pulse generator including a housing and electronics within the housing, the housing having an opening; and a filtered feedthrough, including; a feedthrough wire providing an electrical connection to the electronics, the electrical connection external to the housing; and a capacitor adapted to substantially seal an opening in the housing, the capacitor electrically connected to the housing and electrically connected to the feedthrough wire to substantially prevent electromagnetic interference from interfering with the electronics; wherein the capacitor comprises a first set of plates attached to the housing and a second set of plates attached to the feedthrough wire.
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40. A cardiac pacing system, comprising:
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a pulse generator including a housing and electronics within the housing; a lead attached to said pulse generator; a capacitive filter for filtering out electromagnetic interference, said capacitive filter mounted outside of the housing of the pulse generator and connected to the lead to substantially reduce electromagnetic interference entering the housing; a feedthrough wire providing an interface to the lead and an electrical connection to the electronics, the electrical connection external to the housing, the filter adapted to substantially seal an opening in the housing, and the filter electrically connected to the housing and electrically connected to the feedthrough wire to substantially prevent electromagnetic interference from interfering with the electronics; and wherein the filter comprises a capacitor having a first set of plates attached to the housing and a second set of plates attached to the feedthrough wire.
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41. A cardiac pacing system, comprising:
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a pulse generator including a housing and electronics within the housing; a lead attached to said pulse generator; a capacitive filter for filtering out electromagnetic interference, said capacitive filter mounted outside of the housing of the pulse generator and connected to the lead to substantially reduce electromagnetic interference entering the housing; a feedthrough wire providing an interface to the lead and an electrical connection to the electronics, the electrical connection external to the housing, the filter adapted to substantially seal an opening in the housing, and the filter electrically connected to the housing and electrically connected to the feedthrough wire to substantially prevent electromagnetic interference from interfering with the electronics; and wherein the opening comprises a ferrule having an inner diameter which is smaller than the outer diameter of the filter and the filter is attached to the ferrule.
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42. A cardiac pacing system, comprising:
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a pulse generator including a housing and electronics within the housing; a lead attached to said pulse generator; a capacitive filter for filtering out electromagnetic interference, said capacitive filter mounted outside of the housing of the pulse generator and connected to the lead to substantially reduce electromagnetic interference entering the housing; the housing further comprises a ferrule, the ferrule including the capacitive filter, wherein at least one surface of the capacitor is mounted against the ferrule, and the at least one surface comprises a bottom surface of the capacitor.
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43. A cardiac pacing system, comprising:
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a pulse generator including a housing and electronics within the housing; a lead attached to said pulse generator; a capacitive filter for filtering out electromagnetic interference, said capacitive filter mounted outside of the housing of the pulse generator and connected to the lead to substantially reduce electromagnetic interference entering the housing; the housing further comprises a ferrule, the ferrule including the capacitive filter, wherein the ferrule comprises a square-shaped ferrule.
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44. An implantable device, comprising:
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a pulse generator including a housing; electronics disposed within the housing; a filtered feedthrough including a feedthrough wire and a capacitor; the feedthrough wire providing an electrical connection to the electronics, the electrical connection external to the housing; the capacitor electrically connected to the housing and electrically connected to the feedthrough wire to substantially prevent electromagnetic interference from interfering with the electronics; the capacitor mounted outside of the housing of the pulse generator; and wherein at least four feedthrough wires provide an electrical connection to the electronics.
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45. An implantable device, comprising:
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a pulse generator including a housing; electronics disposed within the housing; a filtered feedthrough including a feedthrough wire and a capacitor; the feedthrough wire providing an electrical connection to the electronics, the electrical connection external to the housing; the capacitor electrically connected to the housing and electrically connected to the feedthrough wire to substantially prevent electromagnetic interference from interfering with the electronics; the capacitor mounted outside of the housing of the pulse generator; and wherein the capacitor is attached to the feedthrough wire with electrically conductive adhesive.
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46. An implantable device, comprising:
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a pulse generator including a housing; electronics disposed within the housing; a filtered feedthrough including a feedthrough wire and a capacitor; the feedthrough wire providing an electrical connection to the electronics, the electrical connection external to the housing; the capacitor electrically connected to the housing and electrically connected to the feedthrough wire to substantially prevent electromagnetic interference from interfering with the electronics; the capacitor mounted outside of the housing of the pulse generator; and the housing further comprising a ferrule, wherein a ceramic feedthrough tube fits within an opening in the ferrule, and the ceramic feedthrough tube fits around the feedthrough wire.
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Specification