Implant device, tool, and methods relating to treatment of paranasal sinuses

An implant device for implantation in a human to fluidly connect a lacrimal apparatus to a paranasal sinus through a fistula formed between the lacrimal apparatus and the paranasal sinus, the implant device comprising:

• a proximal end at a first longitudinal end of the device;
• a distal end at a second longitudinal end of the device that is longitudinally opposite the first longitudinal end;
• a conduit extending from adjacent the proximal end to adjacent the distal end;
• an internal passage extending between the proximal end and the distal end and through the conduit, the internal passage having a first end open at the proximal end and a second end open at the distal end;
• a length of the device longitudinally along the device between the proximal end and the distal end in a range of from 2 millimeters to 50 millimeters;
• a width of the internal passage transverse to the length in a range of from 0.25 millimeter to 5 millimeters;
• and
• an exterior of the conduit comprising an anchoring surface feature including protrusion areas and recess areas;
• the implant device configured to be implanted to fluidly connect the lacrimal apparatus to the paranasal sinus through the fistula so that when implanted:
• the proximal end is disposed with the first end of the internal passage opening in the lacrimal apparatus;
• the distal end is disposed in the paranasal sinus with the second end of the internal passage opening in the paranasal sinus;
• and
• the conduit is disposed through the fistula with at least a portion of the recess areas disposed within the fistula and with at least a portion of the protrusion areas disposed in the fistula and engaging tissue exposed within the fistula to anchor the implant device.