Abstract A temporary cardiac pacing lead is provided with a multiple stranded flexible wire conductor having an insulating coating extending over a major portion of the length of the wire except for an uninsulated terminal forming portion at each end of the wire conductor. A curved needle is attached to one end of the wire conductor and a straight needle is attached to the other end of the wire conductor. The curved needle is passed through the surface of the wall of the heart and is then drawn back out through the surface of the wall so that a portion of one uninsulated terminal forming portion is embedded in the wall and a portion thereof extends out of the wall of the heart. The needle is then passed through a disk-shaped silastic button. The button is moved frictionally on the wire conductor into contact with the surface of the wall of the heart and the portion of the terminal forming portion extending out of the wall is then severed at a position intermediate the needle and the button. The button serves to retain the wire conductor in a fixed position relative to the wall of the heart during stimulation of the heart.
A method of temporarily pacing a heart comprising the steps of: providing a pacing lead comprising an electrically conductive multiple stranded, flexible wire conductor comprising a twisted strand of wire and having an insulating coating extending over a major portion of the entire length of the wire conductor except for an uninsulated conductive terminal forming portion at each end of the wire conductor, and a needle connected to one of the conductive terminal forming portions; inserting the needle into the myocardial wall of the heart at a first position on the wall; passing said needle through a portion of the heart so as to embed a first portion of the conductive terminal forming portion to extend out of the wall of the heart; passing the needle through an insulative anchor button; frictionally moving the insulative anchor button over said needle and over said second portion of the conductive terminal forming portion to a position adjacent to the wall of the heart to keep said wire anchored and said twisted strands of said wire from fraying; severing the second portion of the conductive terminal forming portion at a position adjacent to the insulative anchor button to thereby temporarily fix the position of the conductive terminal forming portion within the heart; and, when it is desired to withdraw the pacing lead from the heart, pulling on the proximal end of the wire conductor to withdraw same from frictional engagement within the anchor button, said anchor button being allowed to remain within the pericardial cavity with no ill effects to the patient.
Claim 2
Independent Claim
259 words
A method of temporarily pacing a heart comprising the steps of: providing a pacing lead comprising an electrically conductive multiple stranded, flexible wire conductor comprising a twisted strand of wire and having an insulating coating extending over a major portion of the entire length of the wire conductor except for an uninsulated conductive terminal forming portion at each end of the wire conductor, and a needle connected to one of the conductive terminal forming portions; inserting the needle into the myocardial wall of the heart at a first position on the wall; passing said needle through a portion of the heart so as to embed a first portion of the conductive terminal forming portion to extend out of the wall of the heart; passing the needle through an insulative anchor button; frictionally moving the insulative anchor button over said needle and over said second portion of the conductive terminal forming portion to a position adjacent to the wall of the heart to keep said wire anchored and said twisted strands of said wire from fraying; severing the second portion of the conductive terminal forming portion at a position adjacent to the insulative anchor button to thereby temporarily fix the position of the conductive terminal forming portion within the heart; and, when it is desired to withdraw the pacing lead from the heart, pulling on the proximal end of the wire conductor to withdraw same from frictional engagement within the anchor button, said anchor button being allowed to remain within the pericardial cavity with no ill effects to the patient.