# US 8,465,520 B2 · Surgical fastener > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,520 B2 - Document ID: US8465520B2 - Status: Granted - Kind: B2 - Application number: 13/666,995 - Filed: 2012-11-02 - Published: 2013-03-07 - Granted: 2013-06-18 - Earliest claimed: 2007-06-12 - Assignees: Covidien LP - Applicants: Covidien LP - Inventors: Kenneth M. Blier - Web page: https://patentgrep.com/patent/US8465520B2 ## CPC - A61B 17/068: Surgical staplers {, e.g. containing multiple staples or clamps}({staplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105;} for performing anastomosis A61B17/115; {staplers in general B25C5/00}) - A61B 17/064: Surgical staples, {i.e. penetrating the tissue} - A61B 17/0644: {penetrating the tissue, deformable to closed position} - A61B 17/0686: {having a forming anvil staying below the tissue during stapling} - A61B 17/072: for applying a row of staples in a single action, e.g. the staples being applied simultaneously - A61B 2017/0003: {of parts of the instruments} - A61B 2017/00115: {with audible or visual output} - A61B 2017/00929: {isolating electrical current} - A61B 2017/07214: {Stapler heads} - A61B 2090/0803: {Counting the number of times an instrument is used} - A61B 2090/0811: {for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An electrosurgical system is provided and comprises a fastening device including a cartridge configured to retain a plurality of fasteners therein and an anvil configured to form the plurality of fasteners; a plurality of surgical fasteners loaded in the cartridge, at least one of the fasteners includes a backspan, a pair of legs depending from the backspan, and at least one contact pad fabricated from an electrically conductive material on the backspan, wherein at least one of the pair of legs is configured to contact the at least one contact pad upon a formation thereof; and an indicating circuit associated with the fasteners, the indicating circuit including an electrical conduit in electrical contact with the at least one contact pad, wherein the indicating circuit includes an energy source and an indicator, wherein the indicator activates upon one of a proper and improper formation of the fasteners. ## Claims ### Claim 1 A method of evaluating a surgical procedure, comprising the steps of: providing a surgical instrument including a plurality of surgical fasteners, the surgical instrument configured to apply the plurality of surgical fasteners to tissue, each surgical fastener comprising; a backspan having a pair of legs extending therefrom, the backspan and pair of legs at least partially formed from an electrically conductive material; and a contact pad disposed on the backspan, the contact pad having a portion formed from an electrically conductive material, the portion formed from an electrically conductive material electrically isolated from the legs and the backspan; providing an indicating unit operably coupled to the surgical instrument, the indicating unit configured to generate a signal upon a current path formed through the contact pad; supplying a current to the surgical instrument and through each of the plurality of surgical fasteners; actuating the surgical instrument to apply the plurality of surgical fasteners; determining the success of a surgical procedure by assessing signals generated by the indicating unit. ### Claim 2 (depends on 1) The method of claim 1, wherein the step of providing an indicating unit includes providing a processor with the indicating unit. ### Claim 3 (depends on 2) The method of claim 2, wherein the step of providing an indicating unit includes the processor determining a percentage of the plurality of surgical fasteners that form a current path through the contact pad. ### Claim 4 (depends on 3) The method of claim 3, wherein the step of determining the success of a surgical procedure includes comparing the percentage of the plurality of surgical fasteners that form a current path through the contact pad to a predetermined value. ### Claim 5 (depends on 1) The method of claim 1, wherein the step of providing the indicating unit includes providing at least one of a display and a speaker operably coupled to the indicating unit. ### Claim 6 (depends on 5) The method of claim 5, wherein the step of determining the success of a surgical procedure includes at least one of the display and speaker generating an output upon receiving the signal. ### Claim 7 (depends on 6) The method of claim 6, wherein the step of determining the success of a surgical procedure includes the indicating unit generating the output having the form of at least one of an audible signal, a color indication, a graphic, and an alphanumeric display. ### Claim 8 (depends on 1) The method of claim 1, wherein the step of determining the success of a surgical procedure includes the indicating unit generating a unique signal when the current bypasses the contact pad. ### Claim 9 A method of evaluating a surgical procedure, comprising the steps of: providing a surgical instrument including a plurality of surgical fasteners, the surgical instrument configured to apply the plurality of surgical fasteners to tissue, each surgical fastener comprising; a backspan defining an upper surface, a lower surface and a pair of side surfaces; a pair of legs depending from the backspan; and at least one contact pad fabricated from an electrically conductive material on the backspan, wherein at least one of the pair of legs is configured to contact the at least one contact pad to provide an indication of formation, wherein the at least one contact pad extends from the lower surface to the upper surface of the backspan along at least one side surface of the backspan; providing an indicating unit operably coupled to the surgical instrument, the indicating unit configured to generate a signal upon a current path formed through the at least one contact pad; supplying a current to the surgical instrument and through each of the plurality of surgical fasteners; actuating the surgical instrument to apply the plurality of surgical fasteners by forming the pair of legs against the at least one contact pad; determining the success of a surgical procedure by assessing signals generated by the indicating unit. ### Claim 10 (depends on 9) The method of claim 9, wherein the indicating circuit includes a processor, and wherein the step of providing an indicating unit includes the processor determining a percentage of the plurality of surgical fasteners that form a current path through the at least one contact pad. ### Claim 11 (depends on 10) The method of claim 10, wherein the step of determining the success of a surgical procedure includes comparing the percentage of the plurality of surgical fasteners that form a current path through the at least one contact pad to a predetermined value. ### Claim 12 (depends on 9) The method of claim 9, wherein the step of providing the indicating unit includes providing at least one of a display and a speaker operably coupled to the indicating unit. ### Claim 13 (depends on 12) The method of claim 12, wherein the step of determining the success of a surgical procedure includes at least one of the display and speaker generating an output upon receiving the signal. ### Claim 14 (depends on 13) The method of claim 13, wherein the step of determining the success of a surgical procedure includes the indicating unit generating the output having the form of at least one of an audible signal, a color indication, a graphic, and an alphanumeric display. ### Claim 15 (depends on 9) The method of claim 9, wherein the step of determining the success of a surgical procedure includes the indicating unit generating a unique signal when the current bypasses the at least one contact pad. ### Claim 16 A method of evaluating a surgical procedure, comprising the steps of: providing an electrosurgical system, including: a fastening device including a cartridge and an anvil, wherein the anvil is in juxtaposed relation relative to the cartridge, wherein the cartridge and the anvil have a spaced apart position and an approximated position, and wherein the cartridge is configured to retain a plurality of fasteners therein and wherein the anvil is configured to form the plurality of fasteners; a plurality of surgical fasteners loaded in the cartridge, at least one of the fasteners includes a backspan, a pair of legs depending from the backspan, and at least one contact pad fabricated from an electrically conductive material on the backspan, wherein at least one of the pair of legs is configured to contact the at least one contact pad upon a formation thereof; and an indicating circuit associated with the fasteners, the indicating circuit including an electrical conduit in electrical contact with the at least one contact pad, wherein the indicating circuit includes an energy source and an indicator, wherein the indicator activates upon one of a proper formation of the fasteners and an improper formation of the fasteners; providing an indicating unit operably coupled to the fastening device, the indicating unit configured to generate a signal upon a current path formed through the at least one contact pad; supplying a current to the fastening device and through each of the plurality of surgical fasteners; actuating the surgical instrument to apply the plurality of surgical fasteners by forming the pair of legs against the at least one contact pad; determining the success of a surgical procedure by assessing signals generated by the indicating unit. ### Claim 17 (depends on 16) The method of claim 16, further comprising the step of forming a fastener, wherein the legs of the formed fastener either: contact a respective contact pad indicating that the fastener is properly formed; or do not contact a respective contact pad indicating that the fastener is not properly formed. ### Claim 18 (depends on 17) The method of claim 17, further comprising the steps of: establishing a circuit loop of the indicating circuit when the respective legs of each fastener do contact the at least one contact pad; and not establishing a circuit loop of the indicating circuit when the respective legs of each fastener do not contact the at least one contact pad. ### Claim 19 (depends on 16) The method of claim 16, further comprising the step of activating the indicator upon a proper formation of a predetermined number of fasteners. ### Claim 20 (depends on 16) The method of claim 16, wherein at least a portion of the backspan of each fastener is non-conductive. ### Claim 21 (depends on 16) The method of claim 16, wherein the at least one contact pad of each fastener is electrically isolated from the backspan. ### Claim 22 (depends on 16) The method of claim 16 wherein the at least one contact pad comprises a pair of contact pads electrically isolated from one another.