US Patent 10265079 Polymeric ligating clip

A one piece molded polymeric ligating clip comprises a pair of curved legs having a unitary hinge at a proximal end and a latch at a distal end. The inner face of each leg includes two rows of transverse ribs, with the rows separated from one another along a longitudinal center line of each leg. The ribs of one row are staggered with respect to the ribs of the other row of the same leg as well as ribs of the corresponding rows on the other leg. Each rib includes a sloped flexible tapered sharp pointed prong which projects away from the inner face of the respective leg and toward the longitudinal center of the leg. The sharp pointed prongs impale the vessel wall when the clip is closed around a vessel or duct.