Balloon cervical dilation devices with telescoping inner shaft, methods of use and manufacture and kits therefor

A method of manufacturing a cervical dilation device, comprising:

• providing an outer tubular member having a proximal end and a distal end;
• providing an inner tubular member sized to telescope within at least a distal portion of the outer tubular member to form a telescoping inner shaft assembly;
• bonding a distal portion of the inner tubular member to a distal section of an inflatable dilation balloon and bonding a proximal section of the dilation balloon to the outer tubular member such that the dilation balloon spans between the inner tubular member and the outer tubular member;
• forming a fluid lumen extending from a proximal connector toward the dilation balloon;
• and
• incorporating a flow restrictor into fluid communication between a proximal fluid reservoir region and the dilation balloon to control a rate of fluid flow into the dilation balloon.

A method of manufacturing a cervical dilation device, comprising:

• providing an outer tubular member having a proximal end and a distal end;
• providing an inner tubular member sized to telescope within at least a distal portion of the outer tubular member to form a telescoping inner shaft assembly;
• forming at least one fluid lumen extending along the outer tubular member from the proximal end toward a distal region of the outer tubular member;
• forming a plurality of fill ports in fluid communication with the at least one fluid lumen;
• and
• bonding an inflatable dilation balloon to the outer tubular member at a proximal balloon bond and to a distal tubular member at a distal balloon bond such that the inflatable dilation balloon is in fluid communication with the at least one fluid lumen and spans between the proximal and distal balloon bonds.