Cardiac defibrillator with case that can be electrically active or inactive
First Claim
1. An implantable cardiac stimulator comprising:
- a pulse generator case having an electrically conductive portion;
pulse generator circuitry housed in said case;
a header attached to said case, said header including at least first and second connector cavities;
said first connector cavity having a first conductive element electrically coupled to said pulse generator circuitry; and
said second connector cavity having an entrance end and a perimeter, and having a first conductive element located at a first distance from said entrance end and at a first position on said perimeter and electrically coupled to said pulse generator circuitry, and having a second conductive element electrically connected to said electrically conductive portion of said case and located at a second position on said perimeter circumferentially spaced from said first position.
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Accused Products
Abstract
A defibrillator having a housing for enclosing and containing defibrillation pulse generator circuitry, particularly adapted to allow for ease of manufacture and use. At least one surface of the housing is electrically conductive and connected to the defibrillation pulse generator circuitry for delivering defibrillating energy to the heart. The defibrillator is provided with a case-activating lead connector cavity having two isolated conductive elements. By tightening a first setscrew onto a lead connector pin, an electrode of the lead becomes active. Tightening a second setscrew activates the can. Tightening both setscrews onto a plug pin activates the can alone. To use neither a lead in the case-activating port, nor an active can, only one setscrew may be tightened onto a conductive or nonconductive pin to plug the cavity without activating the can. By using this system, various electrode configurations can be used as required to provide the optimum system for a given patient. The defibrillator generator housing is preferably implanted in the left pectoral region proximate the heart with the conductive surface facing the heart. Other implantable electrodes are discharged against the defibrillator generator housing electrode.
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Citations
20 Claims
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1. An implantable cardiac stimulator comprising:
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a pulse generator case having an electrically conductive portion; pulse generator circuitry housed in said case; a header attached to said case, said header including at least first and second connector cavities; said first connector cavity having a first conductive element electrically coupled to said pulse generator circuitry; and said second connector cavity having an entrance end and a perimeter, and having a first conductive element located at a first distance from said entrance end and at a first position on said perimeter and electrically coupled to said pulse generator circuitry, and having a second conductive element electrically connected to said electrically conductive portion of said case and located at a second position on said perimeter circumferentially spaced from said first position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An implantable cardiac defibrillator system comprising:
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a pulse generator case having an electrically conductive portion and adapted for subcutaneous implantation either pectorally, abdominally, or at the level of the ventricles of a patient'"'"'s heart; defibrillation pulse generator circuitry housed in said case; a header attached to said case, said header including at least first and second connector cavities; a transvenous lead having a defibrillation lead connector pin inserted into said first connector cavity; a device inserted into said second connector cavity, said device including a device pin; said first connector cavity having a conductive element of a first polarity for making electrical connector contact to said defibrillation lead connector pin; said second connector cavity having an entrance end and a perimeter, and having a first conductive element of a second polarity for making electrical contact to said device pin, and being located at a first distance from said entrance end and at a first position on said perimeter, and a second conductive element electrically connected to said electrically conductive portion of said case, located at a second position on said perimeter circumferentially spaced from said first position, and being movable into a first arrangement in contact with said device pin and into a second arrangement not in contact with said device pin; and means for electrically isolating said second connector cavity second conductive element from said second connector cavity first conductive element when said second cavity second conductive element is in said first arrangement and for allowing electrical conduction between said second connector cavity first conductive element and said second connector cavity second conductive element when said second cavity second conductive element is in said second arrangement. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An implantable cardiac defibrillator system kit comprising:
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a pulse generator case having an electrically conductive portion and adapted for subcutaneous implantation either pectorally, abdominally, or at the level of the ventricles of a patient'"'"'s heart; defibrillation pulse generator circuitry housed in said case; a header attached to said case, said header including at least first and second connector cavities; a transvenous lead having a defibrillation lead connector pin adapted to be inserted into said first connector cavity; a device adapted to be inserted into said second connector cavity, said device including a device pin; said first connector cavity having a conductive element of a first polarity capable of making electrical connector contact to said defibrillation lead connector pin when said defibrillation lead connector pin is inserted into said first connector cavity; said second connector cavity having an entrance end and a perimeter, and having a first conductive element of a second polarity capable of making electrical contact to said device pin when said device is inserted in said second connector cavity, and being located at a first distance from said entrance end and at a first position on said perimeter, and a second conductive element electrically connected to said electrically conductive portion of said case, located at a second position on said perimeter circumferentially spaced from said first position, and being movable into a first arrangement in contact with said device pin and into a second arrangement not in contact with said device pin; and means for electrically isolating said second connector cavity second conductive element from said second connector cavity first conductive element when said second cavity second conductive element is in said first arrangement and for allowing electrical conduction between said second connector cavity first conductive element and said second connector cavity second conductive element when said second cavity second conductive element is in said second arrangement.
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Specification