Feedback algorithms for manual bailout systems for surgical instruments

Patent metadata

Field	Value
Publication number	US-12285166-B2
Application number	US-201916587803-A
Country	US
Kind code	B2
Filing date	Sep 30, 2019
Priority date	Mar 26, 2014
Publication date	Apr 29, 2025
Grant date	Apr 29, 2025

Abstract

The present disclosure provides a surgical instrument including an end effector, a drive member movable to effectuate a motion in said end effector, a motor operable to move the drive member to effectuate the motion in the end effector and a bailout assembly operable to perform a mechanical bailout of the surgical instrument in response to a bailout error. The bailout assembly includes a bailout door, a bailout handle accessible through the bailout door. The bailout handle is operable to move the drive member to effectuate a bailout motion in the end effector. A controller includes a memory and a processor coupled to the memory. The processor is configured to detect the bailout error. The processor is programed to stop the motor in response to the detection of the bailout error.

First claim

What is claimed is:

1. A modular surgical stapling instrument, comprising:
a housing;
a shaft assembly extending from said housing;
an end effector extending from said shaft assembly, wherein said end effector comprises:
a first jaw;
a second jaw comprising an elongate channel; and
a surgical staple cartridge in said elongate channel;

a power source replaceably coupled to said housing;
a firing drive comprising a motor and a firing shaft portion driveable by said motor to perform a staple firing stroke;
one or more sensors configured to:
detect an operational parameter of said power source;
detect a current drawn by said motor during said staple firing stroke; and
detect a parameter of said surgical staple cartridge; and

a controller in communication with said one or more sensors, wherein said controller is configured to:
determine whether the current drawn by the motor increases beyond a first predetermined percentage;
in response to the current increasing beyond the first predetermined percentage, reduce a speed of said firing shaft portion to a non-zero value during a surgical staple firing stroke while continuing through said surgical staple firing stroke;
in response to the current not increasing beyond the first predetermined percentage, maintain previous speed of said firing shaft portion during the surgical staple firing stroke while continuing through said surgical staple firing stroke;
determine whether the current drawn by the motor increases beyond a second predetermined percentage since the reduction of the speed; and
in response to the current increasing beyond the second predetermined percentage, pause said firing shaft portion for a predetermined period of time during said firing stroke, the second predetermined percentage being different than the first predetermined percentage.

2. The modular surgical stapling instrument of claim 1 , wherein said operational parameter of said power source comprises a usage cycle count of said power source.

3. The modular surgical stapling instrument of claim 1 , wherein said parameter of said surgical staple cartridge corresponds to a presence of said surgical staple cartridge in said end effector.

4. The modular surgical stapling instrument of claim 1 , wherein said parameter of said surgical staple cartridge corresponds to a firing status of said staple cartridge.

5. The modular surgical stapling instrument of claim 2 , wherein said controller is further configured to:
compare said usage cycle count to a predetermined usage limit; and
prevent an operation of said power source based on the comparison.

6. The modular surgical stapling instrument of claim 5 , wherein prevent an operation of said power source based on the comparison comprises disabling said power source based on the comparison.

7. The modular surgical stapling instrument of claim 1 , wherein said controller is further configured to determine the change in current draw by intermittently detecting current drawn by the motor during the firing stroke and compare a recent detected current to a previously detected current.

8. The modular surgical stapling instrument of claim 1 , wherein said controller is further configured to determine the change in current draw by comparing a recent current reading to an average current during a time period including a time of the recent current reading.

9. The modular surgical stapling instrument of claim 1 , wherein the controller is configured to reduce the speed of said firing shaft portion during said firing stroke by a predefined step unit in response to the current increasing beyond the first predetermined percentage.

10. The modular surgical stapling instrument of claim 1 , wherein the controller is configured to:
determine whether the current drawn by the motor decreases below a predetermined value; and
in response to the current decreasing below the predetermine value, increase in the speed of said firing draft portion during the surgical staple firing stroke while continuing through said surgical staple firing stroke.

Assignees

• Cilag Gmbh Int

Inventors

• Leimbach Richard L
• Adams Shane R
• Overmyer Mark D
• Swensgard Brett E
• Lytle Iv Thomas W
• Shelton Iv Frederick E
• Houser Kevin L

Classifications

• A61L2103/15

  Laboratory, medical or dentistry appliances, e.g. catheters or sharps · CPC title

• H02J4/25

  for transfer of electric power between AC and DC networks, e.g. for supplying the DC section within a load from an AC mains system · CPC title

• H02J7/975

  in response to temperature · CPC title

• H02J7/971

  the charge cycle being controlled or terminated in response to non-electric parameters · CPC title

• H02J7/82

  Control of state of charge [SOC] · CPC title