Patent ID: 11903569
Assignee: URO-1, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 17:
18. A method comprising:
providing an axially extending core collector with a distal portion that comprises two rows of teeth formed at lateral sides of the core collector to form a cradle portion between the two rows of teeth, with the teeth of each row axially spaced from each other;
providing a cannula configured to surround the core collector for relative axial motions between the cannula and core collector between (i) a first relative position in which the cradle portion protrudes distally from the cannula and (ii) a second relative position in which the cradle portion is inside the cannula, wherein the cradle portion in an axial view from a distal to a proximal end thereof extends over an arc angle sufficient to keep the core collector radially centered in the cannula by the lateral sides and a bottom of said cradle portion bearing against the inside of the cannula during said motions both from the first to the second and from the second to the first relative positions;
introducing the cannula and core collector into tissue and driving a selected length of the core collector distally from the cannula and into tissue;
thereafter, driving the cannula distally over said core collector to thereby sever a sample of said tissue while keeping the core collector radially centered in said cannula; and
extracting a tissue sample collected in an open space between the cannula and the cradle portion formed between the two rows of teeth of the core collector.