Methods of dimensionally stabilizing a lumen of a multi-lumen device during manufacture

A method of producing a multi-lumen elongate body for a medical device, the method comprising:

• extruding a first layer of material over a first lumen tube and at least one second lumen tube to form an elongate body with a first lumen and at least one second lumen, the at least one second lumen tube being in fluid communication with a source of fluid, the source of fluid being one of:
• pressurized gas;
• and
• non-compressible liquid;
• depositing a mesh layer over the elongate body;
• extruding a second layer of material over the mesh layer.

A method of producing a multi-lumen medical device, the method comprising:

• providing a first lumen tube and providing at least one second lumen tube, each of the first lumen tube and the at least one second lumen tube being in fluid communication with a fluid source;
• delivering fluid from the fluid source into the first lumen tube and the at least one second lumen tube;
• extruding a first layer of material over the first lumen tube to form an elongate body having a length, a first lumen, and at least one second lumen;
• depositing a mesh layer over the length of the elongate body;
• and
• extruding a second layer of material over at least a portion of the mesh layer.