Method of manufacturing an implantable medical device detachment system with split tube and cylindrical coupling

A method comprising:

• extending an engagement system through a distal tube such that an implantable medical device engaged to the engagement system is distal of a distal end of the distal tube;
• extending a proximal portion of the engagement system through one or more slots extending distally from a proximal end of the distal tube so that the proximal portion of the engagement system exits the distal tube distally from the proximal end of the distal tube;
• joining the proximal end of the distal tube to a distal end of a proximal tube via a coupling disposed within both the proximal end of the distal tube and the distal end of the proximal tube;
• pulling the proximal portion of the engagement system proximally to compress a compressible portion of the distal tube to a compressed state;
• and
• fixing the engagement system to the distal tube to maintain the compressed state of the compressible portion.