# US 10,813,659 B2 · Rotational tissue cutting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,813,659 B2 - Document ID: US10813659B2 - Status: Granted - Kind: B2 - Application number: 15/933,359 - Filed: 2018-03-22 - Published: 2019-09-26 - Granted: 2020-10-27 - Earliest claimed: 2018-03-22 - Assignees: Spiration, Inc. - Applicants: Spiration, Inc. - Inventors: David A. Herrin - Web page: https://patentgrep.com/patent/US10813659B2 ## CPC - A61B 17/32002: {with continuously rotating, oscillating or reciprocating cutting instruments} - A61B 17/320758: {with a rotating cutting instrument, e.g. motor driven (A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002)} - A61B 17/3201: Scissors (for biopsy A61B10/02) - A61B 17/32053: {Punch like cutting instruments, e.g. using a cylindrical or oval knife (A61B17/326 takes precedence; trepans A61B17/1695)} - A61B 17/3209: Incision instruments - A61B 2017/00367: {Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Disclosed embodiments include apparatuses, systems, and methods for cutting an opening in a tissue wall. In an illustrative embodiment, an apparatus includes an inner cutting member having a first cylindrical body supporting at least one first cutting surface at a distal end. The first cutting surface faces a first rotational direction relative to an axis of the first cylindrical body and has a first cutting edge at an outer periphery of the first cylindrical body. The apparatus also includes an outer cutting member having a second cylindrical body concentrically disposed around the first cylindrical body and supporting at least one second cutting surface at the distal end. The second cutting surface faces a second rotational direction relative to the axis and has a second cutting edge at an inner periphery of the second cylindrical body. A tissue is rotatably scissorable between the first cutting edge of the inner cutting member and the second cutting edge of the outer cutting member responsive to application of the distal end of the apparatus against a tissue and counter-rotating the inner cutting member and the outer cutting member. ## Claims ### Claim 1 An apparatus comprising: an inner cutting member having a first open-ended cylindrical body defining a distal opening configured to receive tissue at a distal end and supporting at least one first cutting surface, wherein the first cutting surface faces a first rotational direction relative to an axis of the first open-ended cylindrical body and has a first cutting edge extending along an outer periphery of the first open-ended cylindrical body; and an outer cutting member having a second cylindrical body concentrically disposed around the first open-ended cylindrical body and supporting at least one second cutting surface at the distal end, wherein the second cutting surface faces a second rotational direction relative to the axis and has a second cutting edge at an inner periphery of the second cylindrical body, a tissue being rotatably scissorable between the first cutting edge of the inner cutting member and the second cutting edge of the outer cutting member responsive to application of the distal end of the apparatus against a tissue and counter-rotating the inner cutting member and the outer cutting member. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the inner cutting member supports two or more first cutting surfaces and the outer cutting member supports two or more second cutting surfaces. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein at least one of the first cutting surfaces and the second cutting surfaces is inclined relative to the axis of the inner cutting member and the outer cutting member. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein the first cutting surfaces are inclined at an acute angle relative to the axis and the second cutting surfaces are substantially parallel with the axis. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the inner cutting member further includes an anchor tip extending outwardly beyond the distal end of the first cutting surface and configured to pierce the tissue. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the anchor tip includes an angled member extending forward of the first cutting surface in the first rotational direction and configured to draw the tissue toward the first cutting surface. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the angled member includes a flattened anchoring surface facing inward from the distal end of the first cutting surface. ### Claim 8 (depends on 6) The apparatus of claim 6, wherein the angled member has a generally helical shape. ### Claim 9 (depends on 5) The apparatus of claim 5, wherein the anchor tip includes a concave cutting surface facing the distal end and terminating in a pointed piercing tip. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein a first proximal end of the inner cutting member and a second proximal end of the outer cutting member are each configured to be coupled to a counter-rotating drive mechanism. ### Claim 11 An apparatus comprising: an inner cutting member having a first open-ended cylindrical body defining a distal opening configured to receive tissue at a distal end and supporting at least two first cutting surfaces, wherein the first cutting surfaces face a first rotational direction relative to an axis of the first open-ended cylindrical body, each of the first cutting surfaces including: a first cutting edge extending along a side of the first open-ended cylindrical body at an outer periphery of the first open-ended cylindrical body and inclined relative to the axis of the inner cutting member; and an anchor tip extending outwardly beyond the distal end of the first cutting surface and configured to pierce the tissue; and an outer cutting member having a second cylindrical body concentrically disposed around the first open-ended cylindrical body and supporting at least two second cutting surfaces at the distal end of the apparatus, wherein each of the second cutting surfaces faces a second rotational direction relative to the axis and has a second cutting edge at an inner periphery of the second cylindrical body, a tissue being pierceable by the anchor tip and being rotationally scissorable between one of the first cutting edges of the inner cutting member and one of the second cutting edges of the outer cutting member responsive to application of the distal end of the apparatus against a tissue and counter-rotating the inner cutting member and the outer cutting member. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the first cutting surfaces are inclined at an acute angle relative to the axis and the second cutting surfaces are substantially parallel with the axis. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein the anchor tip includes an angled member extending forward of the first cutting surface in the first rotational direction and configured to draw the tissue toward the first cutting surface. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the angled member includes a flattened anchoring surface facing inward from the distal end. ### Claim 15 (depends on 13) The apparatus of claim 13, wherein the angled member has a generally helical shape. ### Claim 16 (depends on 11) The apparatus of claim 11, wherein the anchor tip includes a concave cutting surface facing the distal end and ending in a pointed piercing tip. ### Claim 17 (depends on 11) The apparatus of claim 11, wherein a first proximal end of the inner cutting member and a second proximal end of the outer cutting member are each configured to be coupled to a counter-rotating drive mechanism.