Granted Patent
B2
US 12,357,313 · App. 18/585,215 · Granted Jul 15, 2025
Cut optimization for excessive tissue conditions
Inventors:
Steven H. Joyce (Durham, CT); David E. Valentine (Hamden, CT); Patrick Mozdzierz (Glastonbury, CT); Charles R. Kollar (Washington, DC); Haley Strassner (New Haven, CT)
Assignee:
Covidien LP
View Patent ↗
Loading inventors, assignments & file history…
Abstract
A method of operating a surgical stapler includes advancing a knife assembly at a first velocity until a predetermined force is detected, advancing the knife assembly at a second velocity when the predetermined force is detected, the second velocity being less than the first velocity, and continuing to advance the knife assembly at the second velocity until the knife assembly travels a cutting stroke distance.
Claims (35)
1. A powered stapling device comprising:
a staple cartridge including a plurality of staples and an annular knife movable relative to the staple cartridge;
an anvil assembly movable relative to the staple cartridge; and
software configured for:
advancing the annular knife at a first velocity until a predetermined force on the annular knife is detected;
increasing force applied by the annular knife above the predetermined force in response to the annular knife reaching a first position;
determining that the annular knife reached a second position distal of the first position, the second position corresponding to a minimum cutting stroke distance;
after the minimum cutting stroke distance is achieved, advancing the annular knife at a second velocity when the force above the predetermined force is detected, the second velocity being less than the first velocity; and
continuing to advance the annular knife at the second velocity until the annular knife reaches a maximum cutting stroke distance.
2. The powered stapling device according to claim 1 , wherein the first velocity is from about 3.5 in/min to about 4.0 in/min.
3. The powered stapling device according to claim 1 , wherein the second velocity is from about 0.25 in/min to about 0.5 in/min.
4. The powered stapling device according to claim 1 , wherein the predetermined force is about 275 lbf.
5. The powered stapling device according to claim 1 , wherein the maximum cutting stroke distance is from about 0.20 in. to about 0.350 in.
6. The powered stapling device according to claim 5 , wherein the maximum cutting stroke distance is about 0.325 in.
7. The powered stapling device according to claim 1 , wherein the predetermined force occurs when the annular knife engages tissue.
8. A powered stapling device comprising:
a staple cartridge including a plurality of staples and an annular knife movable relative to the staple cartridge;
an anvil assembly movable relative to the staple cartridge; and
software configured for:
advancing the annular knife at a first velocity from a start position to a stop position;
lowering the first velocity to a second velocity in response to reaching an initial cut force limit prior to the annular knife reaching the stop position; and
continuing to advance the annular knife at the second velocity until the annular knife reaches the stop position.
9. The powered stapling device according to claim 8 , wherein the software is further configured for:
increasing the cut force limit to a higher cut force limit in response to reaching an initial cut force limit prior to the annular knife reaching the stop position; and
continuing to advance the annular knife at the second velocity until the annular knife reaches the stop position.
10. The powered stapling device according to claim 9 , wherein the software is further configured for:
lowering the second velocity to a third velocity in response to reaching the higher cut force limit prior to the annular knife reaching the stop position.
11. The powered stapling device according to claim 10 , wherein the software is further configured for:
continuing to advance the annular knife at the third velocity until the annular knife reaches the stop position.
12. The powered stapling device according to claim 8 , wherein the first velocity is from about 3.5 in/min to about 4.0 in/min.
13. The powered stapling device according to claim 8 , wherein the second velocity is from about 0.25 in/min to about 0.5 in/min.
14. The powered stapling device according to claim 8 , wherein the initial cut force limit is about 275 lbf.
15. The powered stapling device according to claim 8 , wherein a cutting stroke distance between the starting position and the stop position is from about 0.20 in. to about 0.350 in.
16. The powered stapling device according to claim 15 , wherein the cutting stroke distance is about 0.325 in.
17. The powered stapling device according to claim 8 , wherein the higher cut force limit is about 350 lbf.
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Feb 23, 2024
From: JOYCE, STEVEN H.; VALENTINE, DAVID E.; MOZDZIERZ, PATRICK; KOLLAR, CHARLES R.; STRASSNER, HALEY
To: COVIDIEN LP
Reel/Frame 066539/0615 →
Continuity (3)
Provisional Application
62960202
· Jan 13, 2020
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