Abstract: A brazing joint, a brazing method, and a device for promoting solder rheology and gas overflow are provided. The brazing joint includes a first base metal, a second base metal, and a brazing seam located therebetween. The brazing seam is formed by filling a solder in a gap formed by welding surfaces of the first and the second base metal and melting it to connect the first and the second base metal. The brazing seam is a concave-shaped brazing seam. The gap defines a first distance and a second distance, the first distance is located at an edge of the gap, the second distance is located at the edge or an inside of the gap, the first distance is greater than the second distance, and a curved surface is formed between the location of the first distance and the location of the second distance for transition.

Abstract: An active bipolar cardiac electrical is assembled by coupling an inner conductor coil to a connector pin to form an inner conductor assembly. The inner conductor assembly is threaded through a connector insulator. An insulating tubing is placed over the inner coil. A proximal end of the insulating tubing is sleeved over the distal extension of the connector insulator. An outer conductor coil is coupled to a ring connector to form an outer conductor assembly. The inner conductor assembly is threaded through the outer conductor assembly. The ring connector is sleeved on the distal extension of the connector insulator and over the insulator tubing. A proximal seal is sleeved over a socket end of the connector pin. The proximal seal is seated on the proximal extension of the connector insulator.

Abstract: A passive cardiac electrical lead is assembled by coupling an inner conductor coil to a connector pin to form an inner conductor assembly. The inner conductor assembly is threaded through a connector insulator. An insulator tubing is placed over the inner coil. A proximal end of the insulator tubing is sleeved over the distal extension of the connector insulator. An outer conductor coil is coupled to a ring connector to form an outer conductor assembly. The inner conductor assembly is threaded through the outer conductor assembly. The ring connector is sleeved on the distal extension of the connector insulator and over the insulator tubing. A proximal seal is sleeved over a socket end of the connector pin. A portion of the proximal seal is seated on the proximal extension of the connector insulator.

Abstract: An active bipolar cardiac electrical is assembled by coupling an inner conductor coil to a connector pin to form an inner conductor assembly. The inner conductor assembly is threaded through a connector insulator. An insulating tubing is placed over the inner coil. A proximal end of the insulating tubing is sleeved over the distal extension of the connector insulator. An outer conductor coil is coupled to a ring connector to form an outer conductor assembly. The inner conductor assembly is threaded through the outer conductor assembly. The ring connector is sleeved on the distal extension of the connector insulator and over the insulator tubing. A proximal seal is sleeved over a socket end of the connector pin. The proximal seal is seated on the proximal extension of the connector insulator.

Abstract: A passive cardiac electrical lead is assembled by coupling an inner conductor coil to a connector pin to form an inner conductor assembly. The inner conductor assembly is threaded through a connector insulator. An insulator tubing is placed over the inner coil. A proximal end of the insulator tubing is sleeved over the distal extension of the connector insulator. An outer conductor coil is coupled to a ring connector to form an outer conductor assembly. The inner conductor assembly is threaded through the outer conductor assembly. The ring connector is sleeved on the distal extension of the connector insulator and over the insulator tubing. A proximal seal is sleeved over a socket end of the connector pin. A portion of the proximal seal is seated on the proximal extension of the connector insulator.