Loose staples removal system

• US 8,960,521 B2
• Filed: 07/15/2011
• Issued: 02/24/2015
• Est. Priority Date: 07/15/2011
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Kostrzewski, Stanislaw
• Primary Examiner(s): Lopez, Michelle
• Assistant Examiner(s): CHUKWURAH, NATHANIEL C
• Application Number:
  US13/183,695
• Publication Number:
  US 20130015231A1
• Time in Patent Office: 1,320 Days
• Field of Search: 227/175.1, 227/176.1, 227/178.1, 227/180.1, 606/219
• US Class Current: 227/176.1
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 2017/07264 characterised by its staple forming cavities, e.g. geometry or material
• CPC Class Codes: A61B 2017/07278 characterised by its sled or its staple holder
• CPC Class Codes: A61B 50/362 for sharps

Abstract

A staple cartridge is provided for retaining fully formed staples not clenched through body tissue. The staple cartridge generally includes staple pockets containing surgical staples having a backspan and first and second legs projecting from the backspan and staple pushers positioned within the staple pockets beneath the surgical staples. The staple pushers include body portions having first and second flexible fingers extending from the body portions and removably engagable with the backspan of the surgical staples. The flexible fingers include flexible stems extending from the body portions and head portions extending from the flexible stems. Each head portion includes a rounded distal tip positioned offset from and outward of a central axis of the stem and an inwardly projecting grasping portion for engaging the backspan of the surgical staple. Distal ends of sidewalls of the staple pockets are flared outwardly to accommodate movement of the head portions of the flexible fingers.

Claims

1. A staple cartridge for use with a surgical stapling instrument comprising:

a staple pocket;

a surgical staple disposed in the staple pocket, the surgical staple including a backspan and first and second legs extending from opposed ends of the backspan; and

a staple pusher disposed in the staple pocket and being removably engageable with the surgical staple, the staple pusher including a body portion having first and second fingers extending from the body portion and engageable with the backspan of the surgical staple, wherein the first finger is flexibly coupled to an upper surface of the body portion by a flexible stem such that the first finger is movable generally transverse to a longitudinal axis of the staple pusher.

2. The staple cartridge as recited in claim 1, wherein the a head portion extends longitudinally away from the stem.

3. The staple cartridge as recited in claim 2, wherein the head portion has a tip offset from an axis of the stem.

4. The staple cartridge as recited in claim 3, wherein the axis of the stem is a central axis.

5. The staple cartridge as recited in claim 3, wherein the head portion has an inwardly projecting grasping projection for engagement with the backspan of the surgical staple.

6. The staple cartridge as recited in claim 2, wherein the upper surface of the body portion includes a longitudinally extending trough for support of the backspan of the surgical staple.

7. The staple cartridge as recited in claim 2, further comprising a third finger extending from the upper surface and removably engageable with the backspan of the staple.

8. The staple cartridge as recited in claim 1, wherein the staple pocket is partially defined by first and second sidewalls and distal ends of the first and second sidewalls are flared outwardly.

9. A staple pusher for use in a staple cartridge comprising:

a generally rectangular body portion having an upper surface;

a first finger projecting from the upper surface, the first finger including a first flexible stem extending from the upper surface and a first head portion extending from the stem; and

a second finger projecting from the upper surface, the second finger including a second flexible stem extending from the upper surface and a second head portion extending from the stem, wherein the first and second head portions include respective first and second grasping projections extending inwardly relative to an axis of the first and second stems.

10. The staple pusher as recited in claim 9, wherein the first and second stems have a longitudinal axis and the first and second head portions include respective first and second rounded distal tips located offset from and outward of the longitudinal axis of the first and second stems.

11. The staple pusher as recited in claim 9, wherein the upper surface of the body portion has a longitudinally extending trough for receipt of a backspan of a surgical staple.

12. A staple pusher for use in a staple cartridge comprising:

a generally rectangular body portion having an upper surface;

a first finger projecting from a first side of the upper surface; and

a second finger projecting from a second side of the upper surface, the first and second fingers being positioned directly opposed to each other across the upper surface, wherein the first finger includes a first flexible stem extending from the upper surface and a first head portion extending from the stem, the first head portion including an inwardly projecting grasping projection.

13. The staple pusher as recited in claim 12, further comprising a third finger projecting from the first side of the upper surface.

14. The staple pusher as recited in claim 13, further comprising a fourth finger projecting from the second side of the upper surface, the fourth finger positioned opposite the third finger across the upper surface.

15. The staple pusher as recited in claim 14, wherein the first and second fingers are longitudinally spaced from the third and fourth fingers on the upper surface of the body portion.