# US 10,368,886 B2 · Surgical apparatus with force sensor for extraction of substances within the body > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,368,886 B2 - Document ID: US10368886B2 - Status: Granted - Kind: B2 - Application number: 15/124,106 - Filed: 2015-03-06 - Published: 2017-01-26 - Granted: 2019-08-06 - Earliest claimed: 2014-03-07 - Assignees: The University of Akron - Applicants: Ajay Mahajan; Zahra Najafi - Inventors: Ajay Mahajan; Zahra Najafi - Web page: https://patentgrep.com/patent/US10368886B2 ## CPC - 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 90/03: {Automatic limiting or abutting means, e.g. for safety} - A61B 2017/00119: {alarm; indicating an abnormal situation} - A61B 2017/2212: {having a closed distal end, e.g. a loop} - A61B 2090/064: {for measuring force, pressure or mechanical tension} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A surgical apparatus for extraction of substances within a body of a human or animal includes an inner cannula, an extraction receptacle secured to the inner cannula, the extraction receptacle being adapted to grip substances to be extracted from the body; and a force sensor including a biasing member, the inner cannula operatively connected to the biasing member at an end of the inner cannula opposite the extraction receptacle, the biasing member exerting a biasing force biasing the inner cannula to pull the extraction receptacle in a direction toward the force sensor, wherein resistive forces on the extraction receptacle during extraction of a substance from the body act against the biasing force and move the biasing member. ## Claims ### Claim 1 A surgical apparatus for extraction of substances within a body of a human or animal comprising: an inner cannula; an extraction receptacle secured to said inner cannula, said extraction receptacle being adapted to grip substances to be extracted from the body; a force sensor including a biasing member; and a swivel, wherein said biasing member is connected to the swivel and wherein said inner cannula is operatively connected to said biasing member at an end of said inner cannula opposite said extraction receptacle, said biasing member exerting a biasing force biasing said inner cannula to pull said extraction receptacle in a direction toward said force sensor, wherein resistive forces on said extraction receptacle during extraction of a substance from the body act against said biasing force and move said biasing member. ### Claim 2 (depends on 1) The surgical apparatus of claim 1, further comprising an outer cannula having a distal end, said outer cannula at least partially surrounding said inner cannula, said inner cannula and said outer cannula moving axially relative to one another. ### Claim 3 (depends on 2) The surgical apparatus of claim 2, wherein said inner cannula extends outside of said distal end of said outer cannula. ### Claim 4 (depends on 3) The surgical apparatus of claim 3, said biasing member biasing said inner cannula to pull said extraction receptacle in a direction toward said distal end. ### Claim 5 (depends on 4) The surgical apparatus as in claim 4, further comprising a handle body for gripping said surgical device. ### Claim 6 (depends on 5) The surgical apparatus as in claim 5, wherein said handle body includes a control button manipulated to deploy said extraction receptacle. ### Claim 7 (depends on 6) The surgical apparatus as in claim 6, wherein said control button manipulates said outer cannula to expose said extraction receptacle and to draw said extraction receptacle at least partially into said outer cannula through said distal end. ### Claim 8 (depends on 7) The surgical apparatus as in claim 7, wherein said force sensor further includes a force indicator moving with the movement of said biasing member. ### Claim 9 (depends on 8) The surgical apparatus as in claim 8, wherein movement of said biasing member provides notice of potential damage to the body of the human or animal. ### Claim 10 (depends on 9) The surgical apparatus as in claim 9, wherein movement of said biasing member causes said force indicator to move into a warning region at which the surgical device provides a warning indication to the user that resistive forces are at an undesired magnitude. ### Claim 11 (depends on 10) The surgical apparatus as in claim 10, wherein said warning indication is selected from either a (i) visual, (ii) auditory, or (iii) tactile response. ### Claim 12 (depends on 10) The surgical apparatus as in claim 10, wherein said biasing member is an extension spring. ### Claim 13 (depends on 12) The surgical apparatus as in claim 12, wherein said warning indication is visual, wherein the force sensor further comprises multiple positional indicia for different positions of said force indicator, with at least one of said multiple positional indicia being said warning region. ### Claim 14 A surgical apparatus for extraction of substances within a body, the surgical apparatus having a cannula, an extraction receptacle secured to said cannula, and a handle body, the improvement comprising said cannula being operatively connected to the handle body by a force sensor, wherein said force sensor includes a biasing member connected to a swivel and said swivel being operatively connected to said handle body. ### Claim 15 (depends on 14) The surgical apparatus as in claim 14, wherein said force sensor further includes a force indicator moving with the movement of the biasing member.