Apparatus and method for surgical fastening

• US 8,091,755 B2
• Filed: 10/30/2009
• Issued: 01/10/2012
• Est. Priority Date: 07/10/1998
• Status: Expired due to Fees

• Current Assignee: General Surgical Innovations Incorporated (Johnson Controls International plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Kayan, Helmut L., Jervis, James E.
• Primary Examiner(s): Rada, Rinaldi I.
• Assistant Examiner(s): Lopez, Michelle
• Application Number:
  US12/609,083
• Publication Number:
  US 20100049215A1
• Time in Patent Office: 802 Days
• Field of Search: 227/175.1, 227/176.1, 227/19, 227/82, 606/142, 606/143
• 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 17/0684 having a forming anvil staying above the tissue during stapling

Abstract

A fastening apparatus for use in endoscopic surgery is provided and includes a fastener applicator having a first half-section and a second half-section. The first half-section includes a flat side having a first recessed region formed therein, the recessed region being configured and dimensioned to retain the plurality of vertically stacked fasteners therein. The second half-section includes a flat side having a second recessed region formed therein. The fastener applicator includes a fastener positioning spring attached to and flush with the first recessed region, wherein the fastener positioning spring is biased to extend beyond the first recessed region and the flat side of the first half-section; and a stop spring housed within the second recessed region, wherein the stop spring is biased such that when unrestrained the stop spring extends beyond the second recessed region and into the first recessed region.

Claims

1. A fastening apparatus for use in endoscopic surgery, comprising:

a handle portion;

a triggering mechanism at least partially positioned in the handle;

a plurality of vertically stacked fasteners; and

a fastener applicator connectable to the handle portion, the fastener applicator including;

a first half-section and a second half-section, the first half-section includes a flat side having a first recessed region formed therein, the recessed region being configured and dimensioned to retain the plurality of vertically stacked fasteners therein, the second half-section includes a flat side having a second recessed region formed therein;

a fastener positioning spring attached to and flush with the first recessed region, wherein the fastener positioning spring is biased to extend beyond the first recessed region and the flat side of the first half-section; and

a stop spring housed within the second recessed region, wherein the stop spring is biased such that when unrestrained the stop spring extends beyond the second recessed region and into the first recessed region.

2. The apparatus of claim 1, wherein the first recessed region is configured and dimensioned to slidably receive a pusher therein.

3. The apparatus of claim 1, wherein the second recessed region is configured and dimensioned to slidably receive a slide therein.

4. The apparatus of claim 3, wherein the slide includes a slotted region which alternately restrains and releases the stop spring by allowing the stop spring to protrude through the slide.

5. The apparatus of claim 3, wherein when the slide is advanced proximally after having urged the fastener distally to be shaped, the ejector springs become unrestrained and urge the shaped fastener off of the anvil.

6. The apparatus of claim 1, wherein a distal end of the first half-section includes a cut-away region configured and dimensioned to permit ejection of one of the plurality of fasteners.

7. The apparatus of claim 6, wherein a distal end of the second half-section is provided with an anvil.

8. The apparatus of claim 7, wherein the anvil is a cantilever that extends beyond the second recessed region and into the cut-away region of the first half-section.

9. The apparatus of claim 8, further comprising:

slot regions formed in the second half-section on either side of the anvil; and

ejector springs housed within each slot region, wherein a distal end of each ejector spring is biased such that when unrestrained each ejector spring extends beyond the anvil and into the cut-away region of the first half-section.

10. The apparatus of claim 7, wherein the slide is configured to urge the ejector springs into a restrained state and shapes a fastener positioned within the second recessed region when the slide is advanced distally.

11. The apparatus of claim 1, wherein a distal end of the first recessed region includes a ramp formed near a distal end thereof to assist a distal-most fastener of the plurality of fasteners to enter the second recessed region.

12. The apparatus of claim 1, wherein the fastener positioning spring is configured and adapted to urge the distal-most fastener of the plurality of fasteners from the first recessed region to the second recessed region when unrestrained.

13. The apparatus of claim 1, wherein the fastener positioning spring is configured and adapted to urge the distal-most fastener of the plurality of fasteners from the first recessed region to the second recessed region when when the slide is positioned proximal of the fastener positioning spring.

14. The apparatus of claim 13, wherein the slide is configured to urge the stop spring into a restrained state and to distally urge a fastener positioned within the second recessed region when the slide is advanced distally.

15. The apparatus of claim 1, wherein the stop spring is configured to retain a fastener adjacent to the distal-most fastener of the plurality of fasteners when in the unrestrained state.

16. A fastening apparatus for use in endoscopic surgery, comprising:

a handle portion;

a triggering mechanism at least partially positioned in the handle;

a plurality of vertically stacked fasteners; and

a fastener applicator connectable to the handle portion, the fastener applicator including;

a slide;

a first half-section including a surface having a fastener storage channel formed therein, wherein the fastener storage channel is configured and dimensioned to retain the plurality of fasteners below the surface of the first half-section;

a second half-section including a surface having a recessed portion formed therein, wherein the recessed portion being configured and dimensioned to allow reciprocating slidable movement of the slide therethrough, and an anvil formed at the distal end of thereof and extending into the recessed portion;

a fastener positioning spring attached within the fastener storage channel, the fastener positioning spring having a distal end which is biased to extend beyond the fastener storage channel and beyond a prominent-most plane of the surface of the first half-section, wherein the fastener positioning spring is configured to urge a distal-most fastener of the plurality of fasteners from the fastener storage channel to the recessed area channel when the slide is positioned proximally of the distal-most fastener; and

a stop spring housed within the recessed area of the second half-section, wherein a distal end of the stop spring is biased such that when unrestrained the distal end of the stop spring extends beyond the drive channel, through the slide and into the fastener storage channel of the first half-section, wherein the distal end of the stop spring engages a fastener adjacent to the distal-most fastener.