Patent ID: 11944283
Assignee: TERUMO KABUSHIKI KAISHA
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 6:
7. An adhesion promoting medical device configured to be interposed between anastomosis sites in a living body, the adhesion promoting medical device comprising:
a biodegradable sheet fabricated from a biodegradable resin, the biodegradable sheet possessing opposite surfaces and including a plurality of spaced-apart through-holes passing through the biodegradable sheet so that the plurality of spaced-apart through-holes open to the opposite surfaces of the biodegradable sheet;
the biodegradable sheet also possessing an outer periphery, the plurality of through-holes being spaced inwardly from the outer periphery of the biodegradable sheet;
each of the through-holes possessing a hole inner diameter D and an outer periphery, a straight line distance between the outer periphery of each of the plurality of spaced-apart through-holes and an adjacent one of the plurality of spaced-apart through-holes being a pitch P of the through-hole;
a ratio (D/P) of the hole inner diameter D to the pitch P of each of the plurality of spaced-apart through-holes is 1.5 or more and less than 40;
application of the adhesion promoting device between the anastomosis sites causes a biological reaction to induce expression of a biological component which accumulates from both of the opposite surfaces of the biodegradable sheet to the plurality of spaced-apart through-holes to thereby promote adhesion at the anastomosis sites; and
wherein each of the plurality of spaced-apart through-holes has an axial extent in a thickness direction of the biodegradable sheet, the inner diameter of at least some of the plurality of spaced-apart through-holes being greater at an axial center of the through hole than at portions of the through-hole adjacent the opposite surfaces of the biodegradable sheet.