MOTOR DRIVEN SURGICAL FASTENER DEVICE WITH CUTTING MEMBER REVERSING MECHANISM

• US 20110006103A1
• Filed: 07/29/2010
• Published: 01/13/2011
• Est. Priority Date: 02/06/2009
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Inventors: Smith, Bret W., Abbott, Daniel J., Smith, Craig S., Laurent, Ryan J., Yates, David C., Swensgard, Brett E., Shelton, Frederick E. IV, Schwemberger, Richard F.
• Granted Patent: US 8,453,907 B2
• Time in Patent Office: Days
• US Class Current: 227/176.1
• CPC Class Codes: A61B 17/068 Surgical staplers , e.g. containing multiple staples or clampsstaplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105; for performing anastomosis A61B17/115; staplers in general B25C5/00
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/00734 battery operated
• CPC Class Codes: A61B 2017/07214 Stapler heads
• CPC Class Codes: A61B 2017/07278 characterised by its sled or its staple holder
• CPC Class Codes: A61B 2017/07285 characterised by its cutter
• CPC Class Codes: A61B 2017/2946 Locking means
• CPC Class Codes: A61B 2017/320052 Guides for cutting instruments
• CPC Class Codes: A61B 2090/304 using chemi-luminescent materials
• CPC Class Codes: A61B 2090/306 using optical fibres
• CPC Class Codes: A61B 2090/309 using white LEDs
• CPC Class Codes: A61B 90/30 Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure

Abstract

A surgical fastener apparatus including a handle, an elongated shaft having a proximal end attached to the handle and a distal end extending therefrom. An end effector comprising a pair of jaws pivoted at a proximal end thereof and movable between an open and closed position, and a cartridge containing a plurality of surgical fasteners, the cartridge attached to the end effector. An electrically powered actuator for deploying the surgical fasteners. An electrically activated reverse mechanism for moving the elongated member from a distal most position within the end effector to a proximal position, the electrically activated reverse mechanism moves the elongated member proximally after the elongated member has moved to the distal most position by moving the trigger to the open position, and wherein after activation of the reverse mechanism proximal movement of the elongated member can be stopped by returning the trigger to its closed position.

Claims

1. A surgical fastener apparatus comprising:

a. a handle, an elongated shaft having a proximal end attached to said handle and a distal end extending therefrom, an end effector comprising a pair of jaws pivoted at a proximal end thereof and movable between an open and closed position, and a cartridge containing a plurality of surgical fasteners, said cartridge attached to said end effector;

b. an electrically powered actuator for deploying said surgical fasteners, said actuator comprising a power source and a motor, said actuator including an elongated member extending through said shaft and movable distally into said end effector for deploying said staples and proximally back out of said end effector;

c. a trigger attached to said handle and having an open and closed position, said trigger configured to activate said actuator when in said closed position; and

d. an electrically activated reverse mechanism for moving said elongated member from a distal most position within said end effector to a proximal position, said electrically activated reverse mechanism moves said elongated member proximally after said elongated member has moved to said distal most position by moving said trigger to said open position, and wherein after activation of said reverse mechanism proximal movement of said elongated member can be stopped by returning said trigger to its closed position.

2. The surgical fastener apparatus of claim 1 wherein said motor is controlled by a motor control circuit comprising a run motor control switch connected to said power source and operated by said trigger such that when said trigger is moved to said closed position, said run motor switch permits current to flow to said motor in a first direction to cause said motor to move said elongated member distally into said end effector and wherein said electrically activated reverse mechanism comprises a reverse motor switch in said motor control circuit for causing said current to flow in a second direction to said motor to cause said motor to retract said elongate member in a proximal direction when said elongate member reaches said distal most position within said end effector.

3. The surgical fastener apparatus of claim 2 wherein said motor control circuit further comprises a stop motor switch that stops said flow of current in said second direction when said elongated member is moved to a proximal most position.

4. The surgical fastener apparatus of claim 2 wherein said reverse mechanism further comprises:

a retraction trigger operably supported by said handle; and

a retraction switch in said motor control circuit and operated by said retraction trigger such that upon activation of said retraction trigger, said retraction switch stops said flow of current in said second direction to said motor.

5. The surgical fastener apparatus of claim 4 wherein said retraction switch comprises a variable resistor.

6. The surgical fastener apparatus of claim 5 wherein said retraction switch further comprises a normally closed contact portion.

7. The surgical fastener apparatus of claim 4 wherein said retraction trigger is movably supported on said trigger.

8. The surgical fastener apparatus of claim 7 wherein said retraction trigger is selectively movable from an unactuated position to an actuated position on said trigger.

9. The surgical fastener apparatus of claim 8 wherein said retraction trigger is biased into said unactuated position.

10. A surgical fastener apparatus comprising:

a handle;

an end effector operably coupled to said handle;

an actuator movable within said end effector between an unactuated position to actuated positions within said end effector;

an electric motor operably interfacing with said actuator to selectively apply a distal driving motion thereto to move said actuator from said unactuated position to said actuated positions and to selectively apply a proximal driving motion to said actuator to retract said actuator to said unactuated position from said actuated positions; and

a motor control circuit for controlling the motor, said motor control circuit comprising;

a power source connected to said motor for electrically powering the motor; and

a current control circuit connected to the power source for controlling current supplied to said motor from said power source, said current control circuit causing said motor to apply said distal driving motion to said actuator upon receipt of an actuation motion and causing said motor to apply said proximal driving motion to said actuator upon receipt of a retraction signal, said current control circuit further configured to alter said application of said proximal driving motion upon receipt of an application of a retraction motion thereto.

11. The surgical apparatus of claim 10 further comprising a firing trigger operably coupled to said handle and wherein said current control circuit comprises a run motor control switch connected to said power source and operated by said firing trigger such that upon application of said actuation motion to said firing trigger, said run motor switch permits current to flow to said motor in a first direction to cause said motor to apply said distal driving motion to said actuator.

12. The surgical apparatus of claim 11 wherein said current control circuit further comprises a reverse motor switch connected to said power source such that when said actuator has moved to a distal most actuated position, said reverse motor switch permits current to flow to said motor in a second direction to cause said motor to apply said proximal driving motion to said actuator.

13. The surgical apparatus of claim 12 further comprising a retraction trigger operably supported by said handle and wherein said current control circuit comprises a retraction switch connected to said power source and operated by said retraction trigger such that upon application of said retraction motion to said retraction trigger, said retraction switch alters said flow of current in said second direction to said motor.

14. The surgical apparatus of claim 13 wherein retraction switch comprises a variable resistor.

15. The surgical apparatus of claim 14 wherein said retraction switch further comprises a normally closed contact portion.

16. The surgical apparatus of claim 13 wherein said retraction trigger is movably supported on said firing trigger.

17. The surgical fastener apparatus of claim 16 wherein said retraction trigger is selectively movable from an unactuated position to an actuated position on said firing trigger.

18. The surgical fastener apparatus of claim 17 wherein said retraction trigger is biased into said unactuated position.

19. The surgical fastener apparatus of claim 13 wherein upon application of said retraction motion to said retraction trigger, said retraction switch stops said flow of current in said second direction to said motor.

20. A surgical fastener apparatus comprising:

a handle;

an elongated shaft having a proximal end attached to said handle;

a channel coupled to a distal end of said elongated shaft and configured to operably support a surgical staple cartridge therein;

an actuator movably supported for distal and proximal travel within said channel;

a firing trigger operably coupled to said handle;

a retraction trigger operably supported on said firing trigger;

an electric motor operably interfacing with said actuator to selectively apply a distal driving motion thereto to distally move said actuator from an unactuated position to actuated positions and to selectively apply a proximal driving motion to said actuator to retract said actuator to said unactuated position from said actuated positions; and

a motor control circuit for controlling the motor, said motor control circuit comprising;

a power source connected to said motor for electrically powering the motor; and

a current control circuit connected to the power source for controlling current supplied to said motor from said power source, said current control circuit comprising;

a run motor control switch connected to said power source and operated by said firing trigger such that upon application of said actuation motion to said firing trigger, said run motor control switch permits current to flow to said motor in a first direction to cause said motor to apply said distal driving motion to said actuator;

a reverse motor switch connected to said power source such that when said actuator has moved to a distal most actuated position, said reverse motor switch permits current to flow to said motor in a second direction to cause said motor to apply said proximal driving motion to said actuator; and

a retraction switch connected to said power source and operated by said retraction trigger such that upon application of said retraction motion to said retraction trigger, said retraction switch alters said flow of current in said second direction to said motor.