Ductus side-entry and prosthetic disorder response systems

A collar adapted for attachment about a tubular anatomical structure, said collar comprising:

• an outer shell of semicylindrical halves joined together along a common edge where said semicylindrical halves meet by spring-loaded hinges, so that said semicylindrical shell halves when opened and placed to encircle said tubular anatomical structure, the shell halves are configured to grip about said tubular anatomical structure as a stationary collar;
• a cushioning layer lining the internal surface of each shell half;
• perforations which pass entirely through said outer shell and said cushioning layer;
• a first opening in the side of said collar;
• a side tube with a trepan front edge engaged in said first opening, such that said side tube is rotatable around and reciprocable along its longitudinal axis;
• wherein the side tube is configured to allow a plug of tissue to be excised from the wall of said tubular anatomical structure so that a lumen of said side tube will be continuous with a lumen of said tubular anatomical structure;
• said side tube thereafter being configured to be fixable in rotational angle and depth of penetration into the side of said tubular anatomical structure;
• and a self-locking screw down cap that fits onto an external thread at a base of said side tube and is configured to allow said side tube to be fixed in rotational angle and depth of insertion into said first opening.