Surgical Stapling Apparatus

• US 20120228358A1
• Filed: 03/19/2012
• Published: 09/13/2012
• Est. Priority Date: 08/11/2009
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Zemlok, Michael A., Ross, Adam J., Pribanic, Russell, Williams, Ryan
• Granted Patent: US 8,955,732 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 17/072 for applying a row of staples in a single action , e.g. the staples being applied simultaneously
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 2017/00022 Sensing or detecting at the treatment site
• CPC Class Codes: A61B 2017/00115 with audible or visual output with imaging means A61B90/37, A61B34/20
• CPC Class Codes: A61B 2017/00123 and automatic shutdown
• CPC Class Codes: A61B 2017/00221 with wireless transmission of data, e.g. by infrared radiation or radiowaves
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/00473 Distal part, e.g. tip or head A61B2017/00464 takes precedence
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00685 Archimedes screw
• CPC Class Codes: A61B 2017/00845 of moving parts with respect to each other
• CPC Class Codes: A61B 2017/00853 low friction, hydrophobic and corrosion-resistant fluorocarbon resin coating (ptf, ptfe, polytetrafluoroethylene)
• CPC Class Codes: A61B 2017/07221 curved
• CPC Class Codes: A61B 2017/07257 characterised by its anvil
• CPC Class Codes: A61B 2017/07271 characterised by its cartridge
• CPC Class Codes: A61B 2017/07278 characterised by its sled or its staple holder
• CPC Class Codes: A61B 2090/065 for measuring contact or contact pressure
• CPC Class Codes: 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
• CPC Class Codes: A61B 90/90 Identification means for patients or instruments, e.g. tags

Abstract

A surgical stapling apparatus is provided and includes a housing, an elongated member, an end effector, and a staple formation circuit. The elongated member extends from the housing. The end effector is disposed on an end of the elongated member and has first and second jaws. The first jaw includes a staple cartridge having a plurality of staples. Each of the staples has first and second legs. The second jaw has a plurality of staple forming pockets. The staple formation circuit may be disposed on the second jaw. The staple formation circuit communicates a signal to a controller coupled to the staple formation circuit. The signal is representative of one or more of a formation, a malformation, and a nonformation of one or both of the first and second legs of one or more of the staples within one or more of the staple forming pockets.

Claims

1. A surgical stapling apparatus, comprising:

a housing;

an elongated member extending from the housing;

an end effector disposed on an end of the elongated member, the end effector having a first jaw member and a second jaw member, the first jaw member including;

a staple cartridge with a segmented staple guide having a plurality of segments, each segment being movable between at least one loaded position and an unloaded position;

at least one pressure sensing element disposed adjacent the staple guide, the at least one pressure sensing element configured to identify differences in applied pressure along the staple guide in response to movement of at least one of the plurality of segments of the staple guide when tissue is disposed between the first and second jaw members to sense variations in tissue thickness along the staple guide; and

a locking feature configured to limit movement of the plurality of segments of the staple guide.

2. The surgical stapling apparatus of claim 1, wherein the pressure sensing element is segmented.

3. The surgical stapling apparatus of claim 2, wherein each segment of the staple guide corresponds to a segment of the pressure sensing element.

4. The surgical stapling apparatus of claim 1, wherein the first jaw member includes a first angled portion and the segmented staple guide includes a second angled portion, the first and second angled portions disposed in registration to maintain the segmented staple guide in a substantially fixed position relative to the first jaw member.

5. The surgical stapling apparatus of claim 1, wherein each segment of the staple guide is spring loaded at a set height in the unloaded position.

6. The surgical stapling apparatus of claim 1, wherein at least one segment of the staple guide approximates with the pressure sensing element when tissue is disposed between the first and second jaw members.

7. The surgical stapling apparatus of claim 1, wherein at least one segment of the staple guide is independently movable relative to the other segments of the staple guide.

8. The surgical stapling apparatus of claim 1, wherein each segment of the staple guide compresses to one of the at least one loaded positions when tissue is clamped between the first jaw member and the second jaw member.

9. The surgical stapling apparatus of claim 1, wherein each segment of the staple guide is laterally and longitudinally pivotable in a fixed position relative to the other segments.

10. The surgical stapling apparatus of claim 1, wherein the staple cartridge includes a one-piece staple pusher that deploys a plurality of staples from the staple cartridge independent of the positioning of any of the segments of the staple guide.

11. The surgical stapling apparatus of claim 1, further comprising a controller in electrical communication with the pressure sensing element.

12. The surgical stapling apparatus of claim 11, wherein the controller is configured to identify unsafe loads along the staple guide based upon a first signal transmitted from the pressure sensing element and generate a second signal to the surgical stapling apparatus to prevent firing and/or clamping of the surgical stapling apparatus when an unsafe load is identified by the controller.

13. The surgical stapling apparatus of claim 11, further comprising a staple formation circuit communicating a signal to the controller, the signal representative of at least one of a formation, a malformation, and a nonformation of at least one of the first and second legs of at least one of the staples of the plurality of staples within at least one of the staple forming pockets.

14. The surgical stapling apparatus of claim 1, wherein the pressure sensing element includes a film.

15. The surgical stapling apparatus according to claim 11, wherein, the controller communicates an output signal to the surgical stapling apparatus directing the surgical stapling apparatus to perform at least one operation, the at least one operation including at least one of preventing further staple formation, facilitating further staple formation, emitting a warning, and emitting an error feedback.

16. An end effector, comprising:

a first jaw member and a second jaw member, the first jaw member including;

a staple cartridge with a segmented staple guide having a plurality of segments, each segment being movable between at least one loaded position and an unloaded position;

at least one pressure sensing element disposed adjacent the staple guide, the at least one pressure sensing element configured to identify differences in applied pressure along the staple guide in response to movement of at least one of the plurality of segments of the staple guide when tissue is disposed between the first and second jaw members to sense variations in tissue thickness along the staple guide; and

a locking feature configured to limit movement of the plurality of segments of the staple guide.

17. An electro-surgical stapling system, comprising:

a powered surgical apparatus including;

an energy source;

a handle portion configured to releasably connect a surgical stapling end effector thereto, the handle portion including an actuator for connection to the end effector and for driving the end effector;

a controller for controlling the energy source and the surgical stapling end effector;

the surgical stapling end effector configured for selective connection to the handle portion of the powered surgical apparatus, the surgical stapling end effector including;

a first jaw supporting at least one pressure sensing element and including a locking feature;

a second jaw connected to the first jaw and supporting an anvil, the anvil defining a plurality of staple forming pockets; and

a staple cartridge supported on the first jaw and including;

a plurality of staples positioned within a plurality of staple retaining slots, the staple forming pockets of the anvil arranged in juxtaposed correspondence with the plurality of staple retaining slots of the staple cartridge;

a segmented staple guide including a plurality of movable segments, the at least one pressure sensing element of the first jaw configured to identify differences in applied pressure along the segmented staple guide in response to movement of at least one of the plurality of movable segments, the locking feature of the first jaw limiting movement of the plurality of movable segments; and

a one-piece staple pusher that deploys the plurality of staples from the plurality of staple retaining slots independent of the positioning of any of the movable segments of the plurality of movable segments.