# US 2013/0158392 A1 · Reciprocating Drive Optical Scanner for Surgical Endoprobes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0158392 A1 - Document ID: US20130158392A1 - Status: Published application - Kind: A1 - Application number: 13/692,280 - Filed: 2012-12-03 - Published: 2013-06-20 - Earliest claimed: 2011-12-19 - Inventors: Michael Papac; John Christopher Huculak; Michael J. Yadlowsky - Web page: https://patentgrep.com/patent/US20130158392A1 ## CPC - A61F 9/008: using laser - A61B 3/102: {for optical coherence tomography [OCT]} - A61B 5/0066: {Optical coherence imaging} - A61F 9/00821: {for coagulation} - A61B 2018/2005: {with beam delivery through an interstitially insertable device, e.g. needle} - A61F 2009/00863: {Retina} - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A microsurgical endoprobe and method for use are provided. The microsurgical endoprobe may have a cannula assembly with a proximal element and a distal element coupled to a mechanical actuator. The microsurgical endoprobe may be configured to rotate at least one of the proximal element and the distal element in a first direction for an arc period, perform a microsurgical procedure on the tissue, and rotate the at least one of the proximal element and the distal element in a second direction opposite to the first direction for the arc period. The microsurgical endoprobe may include a hand-piece having a motor with a cannula assembly coupled to the hand-piece. ## Claims ### Claim 1 A microsurgical endoprobe comprising a hand-piece comprising a motor; a cannula assembly coupled to the hand-piece; the cannula assembly comprising: a first tube able to rotate about a longitudinal axis; a second tube within the first tube, able to rotate within the first tube; a distal optical element attached to the first tube; and a proximal optical element attached to the second tube; wherein the motor is coupled to provide a reciprocating rotational motion to at least one of the second tube and the first tube for an arc period. ### Claim 2 (depends on 1) The endoprobe of claim 1 wherein the distal optical element and the proximal optical element comprise a GRIN (gradient index) lens. ### Claim 3 (depends on 2) The endoprobe of claim 2 wherein the GRIN lenses have a face cut at a non-orthogonal angle relative to a longitudinal axis. ### Claim 4 (depends on 1) The endoprobe of claim 1 wherein at least one of the distal optical element and the proximal optical element comprise a prism. ### Claim 5 (depends on 1) The endoprobe of claim 1 wherein the reciprocating motion includes a first cycle rotating the first tube in a first direction and counter-rotating the second tube; and a second cycle rotating the second tube in the first direction and counter-rotating the first tube. ### Claim 6 (depends on 1) The endoprobe of claim 1 wherein the arc period is less than or equal to 180 degrees. ### Claim 7 (depends on 1) The endoprobe of claim 1 wherein at least one of the distal optical element and the proximal optical element has an optical axis concentric with the longitudinal axis. ### Claim 8 (depends on 1) The endoprobe of claim 1 wherein at least one of the distal optical element and the proximal optical element has an optical axis eccentric to the longitudinal axis. ### Claim 9 An optical cannula assembly comprising an outer tube able to rotate about a longitudinal axis; an inner tube within the outer tube, able to rotate within the outer tube; a distal optical element attached to the outer tube; and a proximal optical element attached to the inner tube; wherein a proximal end of the cannula assembly is configured to engage a mechanical actuator to provide a reciprocating rotational motion to at least one of the outer tube and the inner tube for an arc period. ### Claim 10 (depends on 9) The cannula assembly of claim 9 wherein the outer tube has a first cross-sectional area and the distal optical element has a second cross-sectional area, the second cross-sectional area being greater than 50% of the first cross-sectional area. ### Claim 11 (depends on 9) The cannula assembly of claim 9 wherein the outer tube has a tissue engaging surface. ### Claim 12 A method for using a microsurgical endoprobe having a cannula assembly, comprising: inserting the microsurgical endoprobe into a tissue, the microsurgical endoprobe having a cannula assembly with a proximal element and a distal element coupled to a mechanical actuator; rotating at least one of the proximal element and the distal element in a first direction for an arc period; performing a microsurgical procedure on the tissue; and rotating the at least one of the proximal element and the distal element in a second direction opposite to the first direction for the arc period. ### Claim 13 (depends on 12) The method of claim 12 wherein the arc period is less than or equal to 180 degrees. ### Claim 14 (depends on 12) The method of claim 12 wherein the rotating at least one of the proximal element and the distal element comprises rotating the proximal element for the arc period and counter-rotating the distal element for the arc period. ### Claim 15 (depends on 12) The method of claim 12 wherein the inserting the microsurgical endoprobe into the tissue comprises engaging at least one of the first tube and the second tube with the tissue. ### Claim 16 (depends on 12) The method of claim 12 wherein the arc period is less than or equal to 180 degrees. ### Claim 17 (depends on 12) The method of claim 12 wherein the arc period is less than or equal to 90 degrees. ### Claim 18 (depends on 12) The method of claim 12 wherein the microsurgical procedure is an Optical Coherence Tomography (OCT) scan. ### Claim 19 (depends on 12) The method of claim 12 wherein the microsurgical procedure includes distributing therapeutic laser pulses across the retina. ### Claim 20 (depends on 12) The method of claim 12 wherein the microsurgical procedure is pan retinal photocoagulation.