# US 12,178,569 B2 · Systems and methods for object size estimation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,178,569 B2 - Document ID: US12178569B2 - Status: Granted - Kind: B2 - Application number: 18/047,752 - Filed: 2022-10-19 - Published: 2023-03-02 - Granted: 2024-12-31 - Earliest claimed: 2018-04-30 - Assignees: Boston Scientific Medical Device Limited - Applicants: Boston Scientific Medical Device Limited - Inventors: Ashish Jain; Denise C. Lane - Web page: https://patentgrep.com/patent/US12178569B2 ## CPC - A61B 5/1076: {for measuring dimensions inside body cavities, e.g. using catheters (A61B3/1005 takes precedence)} - A61B 17/221: Gripping devices in the form of loops or baskets {for gripping calculi or similar types of obstructions (surgical snare instruments A61B17/32056)} - A61B 90/92: coded with colour - A61B 2017/00858: {high friction or non-slip} - A61B 2017/2212: {having a closed distal end, e.g. a loop} - A61B 2090/061: {for measuring dimensions, e.g. length} - A61B 2090/063: {for measuring volume} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A medical device may include a handle assembly having an actuator and a sheath. The sheath may extend between a proximal end and a distal end. The proximal end of the sheath may be coupled with the actuator. The medical device may further include an end-effector moveable relative to the sheath between an extended configuration and a retracted configuration. The end-effector may include a plurality of expandable legs. Each of the plurality of expandable legs may include a plurality of first indicia and a plurality of second indicia. A color of each of the first plurality of indicia may be different than a color of each of the second plurality of indicia. ## Claims ### Claim 1 A medical device, comprising: a handle assembly including an actuator; a sheath extending between a proximal end and a distal end, the proximal end of the sheath being coupled with the actuator; and an end-effector moveable relative to the sheath between an extended configuration and a retracted configuration, the end-effector including a plurality of expandable legs, each of the plurality of expandable legs including a plurality of first indicia and a plurality of second indicia; wherein each of the first plurality of indicia has a first color; wherein each of the second plurality of indicia has a second color different from the first color; wherein (i) each of the first plurality of indicia, (ii) each of the second plurality of indicia, or (iii) each of the first plurality of indicia and each of the second plurality of indicia includes a physical attribute extending radially outwards or inwards relative to a longitudinal axis of the respective leg, and wherein a length of each of the first plurality of indicia and a length of each of the second plurality of indicia are substantially the same, and the length of each of the first plurality of indicia and the length of each of the second plurality of indicia is between about 0.5 mm and about 3.0 mm. ### Claim 2 (depends on 1) The medical device of claim 1, wherein the first plurality of indicia and the second plurality of indicia alternate along a length of each leg of the plurality of legs. ### Claim 3 (depends on 1) The medical device of claim 1, wherein the second color of each of the second plurality of indicia is darker than the first color of each of the first plurality of indicia. ### Claim 4 (depends on 1) The medical device of claim 1, wherein the physical attribute includes one or more of a protrusion, bump, extension, tine, groove, cutout, depression, or recess. ### Claim 5 (depends on 4) The medical device of claim 4, wherein each of the first plurality of indicia and each of the second plurality of indicia includes the physical attribute. ### Claim 6 (depends on 5) The medical device of claim 5, wherein the physical attribute of each of the first plurality of indicia is different from the physical attribute of each of the second plurality of indicia. ### Claim 7 (depends on 1) The medical device of claim 1, wherein the length of each of the first plurality of indicia and the length of each of the second plurality of indicia is about 2.0 mm. ### Claim 8 (depends on 1) The medical device of claim 1, wherein each of the first plurality of indicia include a first coefficient of friction and each of the second plurality of indicia include a second coefficient of friction, and the second coefficient of friction is different from the first coefficient of friction. ### Claim 9 (depends on 1) The medical device of claim 1, wherein the end-effector is monolithic. ### Claim 10 A medical device, comprising: a handle assembly; a sheath, a proximal end of the sheath being coupled with the handle assembly; an end-effector moveable relative to the sheath between an extended configuration and a retracted configuration; the end-effector including at least one expandable leg, the at least one expandable leg including: a plurality of first indicia, wherein each of the plurality of first indicia includes a coating having a first color, wherein a length of each of the first indicia is the same; and a plurality of second indicia, wherein each of the plurality of second indicia has a second color different from the first color, wherein a length of each of the second indicia is the same; wherein the length of each of the first plurality of indicia is different from the length of each of the second plurality of indicia, and the length of each of the first plurality of indicia and the length of each of the second plurality of indicia is between about 0.5 mm and about 3.0 mm, and wherein each of the first plurality of indicia or each of the second plurality of indicia includes a physical attribute extending radially outwards or inwards relative to a longitudinal axis of the at least one expandable leg. ### Claim 11 (depends on 10) The medical device of claim 10, wherein the at least one expandable leg includes the plurality of first indicia and the plurality of second indicia. ### Claim 12 (depends on 10) The medical device of claim 10, wherein the second color of each of the plurality of second indicia is darker than the first color of each of the plurality of first indicia. ### Claim 13 (depends on 12) The medical device of claim 12, wherein the first color of each the plurality of first indicia is white or wherein the first color of each of the plurality of first indicia is blue, and wherein the second color of each of the plurality of second indicia is black. ### Claim 14 (depends on 10) The medical device of claim 10, wherein each of the plurality of first indicia include a first coefficient of friction and each of the plurality of second indicia include a second coefficient of friction, and the second coefficient of friction is greater than the first coefficient of friction. ### Claim 15 (depends on 10) The medical device of claim 10, wherein the end-effector is monolithically formed from a single piece of material.