Improved specimen retrieval bag

Abstract From the Canadian patent

A surgical instrument for the improved removal using a specimen retrieval , bag, of biological material from a patient. The surgical instrument includes a specimen , retrieval bag having a flexible wall and a closed end and an open end wherein , the open , end is for receiving biological materials. The instrument includes a noose adjacent to the , open end, wherein the noose constricts the open end to substantially close the open end. , The bag includes a row of alternating flexible and stiff areas on its wall adjacent to and , about a periphery of the open end whereby when the open end is noosed, the flexible , areas buckle before the stiff areas.