Medical lead and method of making and using with sodium sulfosuccinic ester
First Claim
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1. A medical device having a body fluid contacting surface for placement within the interior of a patient'"'"'s body comprising:
- a porous material having open-celled pores comprising a portion of said surface; and
a sodium sulfosuccinic ester located within said pores in a quantity sufficient to accelerate wetting out of said pores with bodily fluids when said medical device is placed within the interior of said patient.
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Abstract
A continuous sheath of open-celled porous plastic, preferably ePTFE, is used on the outside of a medical lead, extending along the lead body and the electrodes. Because the plastic is open-celled, when the pores are filled with saline, the lead can deliver electrical energy through the pores in the plastic. Pore size is chosen to discourage tissue ingrowth while allowing for defibrillation energy delivery and electrical signals through it. The porous plastic has a biocompatible wetting agent applied to it to speed the process of filling the pores with saline.
155 Citations
19 Claims
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1. A medical device having a body fluid contacting surface for placement within the interior of a patient'"'"'s body comprising:
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a porous material having open-celled pores comprising a portion of said surface; and a sodium sulfosuccinic ester located within said pores in a quantity sufficient to accelerate wetting out of said pores with bodily fluids when said medical device is placed within the interior of said patient.
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2. A medical device having a body fluid contacting surface for placement within the interior of a patient'"'"'s body comprising:
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an electrode; a porous material overlaying at least a portion of said electrode and having open-celled pores comprising a portion of said surface; and a sodium sulfosuccinic ester located within said pores in a quantity sufficient to accelerate wetting out of said pores with bodily fluids when said medical device is placed within the interior of said patient. - View Dependent Claims (3, 4, 5, 6)
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7. A medical electrical lead for placement within the interior of a patient'"'"'s body, comprising:
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at least one electrode for sensing electrical signals from said patient'"'"'s body or for delivering therapeutic current to said patient; an insulated conductor electrically coupled to said electrode; a lead connector electrically coupled to said insulated conductor; a fluoropolymer layer having open-celled pores; and a sodium sulfosuccinic ester located within said pores in a quantity sufficient to accelerate wetting out of said pores with bodily fluids when said medical device is placed within the interior of said patient'"'"'s body. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for applying a wetting agent to a porous portion of a medical device comprising the steps of:
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(a) dissolving a sodium sulfosuccinic ester in a solvent to form a sodium sulfosuccinic ester solution; (b) applying said sodium sulfosuccinic ester solution to at least a portion of said porous portion of said medical device; and (c) evaporating off said solvent. - View Dependent Claims (17, 18, 19)
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Specification