Terminal for medical instrument and method of assembling the terminal

摘要

A terminal is provided for introducing signals from an electrical terminal pin in a heart pacemaker to a terminal lead introduced into a patient's body. The terminal pin is disposed in a lid of the heart pacemaker so that the terminal pin is insulated from the lid. Means are also provided for introducing the signals on the terminal pin to the terminal lead without subjecting the pin to undue stresses. The terminal includes a hollow, electrically conductive ferrule disposed in concentric relationship with the terminal pin and attached to the lid. An electrical filter is disposed in the ferrule and is maintained in fixed relationship to the ferrule and the terminal. Insulating means are provided for bonding the ferrule and the terminal. An elongated sleeve is disposed on the ferrule and an insulating material is disposed between the terminal pin and the sleeve and is hermetically sealed to the terminal pin and the sleeve. The sleeve supports an electrically conductive catheter block which fits over the electrical terminal pin and communicates electrically with the terminal pin. The catheter block also holds the terminal lead in fixed position and communicates electrically with the lead and directs the lead into the body of the patient. A method is also provided for assembling the terminal. The method provides for the assembly of the terminal in a minimum number of steps and in a manner to insure the proper assembly of the terminal without breaking any components in the terminal.