Anvil for surgical stapler

• US 9,463,018 B2
• Filed: 05/20/2013
• Issued: 10/11/2016
• Est. Priority Date: 02/06/2009
• Status: Expired due to Fees

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Milliman, Keith
• Primary Examiner(s): Smith, Scott A.
• Application Number:
  US13/897,473
• Publication Number:
  US 20130253578A1
• Time in Patent Office: 1,240 Days
• Field of Search: 227/19, 227/175.1, 227/176.1, 227/180.1, 606/213, 606/219, 606/137, 606/143, 606/151, 606/153
• US Class Current: 1/1
• CPC Class Codes: A61B 17/0644 penetrating the tissue, deformable to closed position
• 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 17/115 Staplers for performing anastomosis in a single operation
• CPC Class Codes: A61B 17/1155 Circular staplers comprising a plurality of staples
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/00831 Material properties
• CPC Class Codes: A61B 2017/00853 low friction, hydrophobic and corrosion-resistant fluorocarbon resin coating (ptf, ptfe, polytetrafluoroethylene)
• CPC Class Codes: A61B 2017/07214 Stapler heads
• CPC Class Codes: A61B 2017/07257 characterised by its anvil
• CPC Class Codes: A61B 2017/07264 characterised by its staple forming cavities, e.g. geometry or material
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: Y10T 29/49908 Joining by deforming

Abstract

An anvil assembly for use therewith a surgical fastener applying apparatus including an anvil plate and an anvil head configured and dimensioned to support the anvil plate. The anvil plate and the anvil head may be formed from different materials. The anvil plate can include a tapered outer side wall allowing the anvil assembly to realize a substantially uniform proximal-most surface upon assembly.

Claims

1. A method of manufacturing an anvil assembly for use with a surgical fastener applying apparatus, the method comprising:

providing an anvil head defining a central longitudinal axis;

providing an anvil plate including an outer side wall that tapers along a linear slope towards the central longitudinal axis of the anvil head;

positioning the anvil head and the anvil plate in contacting relation; and

deforming a portion of the anvil head towards the anvil plate to fixedly secure the anvil head and the anvil plate together such that the anvil assembly includes a substantially uniform proximal-most surface.

2. The method of claim 1, wherein providing the anvil head and providing the anvil plate includes providing the anvil head such that the anvil head is formed from a first material, and providing the anvil plate such that the anvil plate is formed from a second material different from the first material.

3. The method of claim 2, wherein providing the anvil head includes providing the anvil head such that the second material is selected from the group consisting of steel, titanium, magnesium, aluminum, and zinc alloy.

4. The method of claim 2, wherein providing the anvil plate includes providing a tissue contacting surface with a coating formed from a third material different from each of the first and second materials.

5. The method of claim 4, wherein providing the anvil plate includes providing the anvil plate such that the third material comprises a nickel nonstick coating.

6. The method of claim 1, wherein deforming the portion of the anvil head includes deforming an annular lip of the anvil head towards the anvil plate such that the annular lip is substantially flush with the anvil plate.

7. The method of claim 1, wherein deforming the portion of the anvil head includes deforming the annular lip such that the annular lip forms an acute angle with the central longitudinal axis.

8. The method of claim 7, wherein deforming the portion of the anvil head includes moving the annular lip towards the anvil plate such that the acute angle lies within the range of approximately 5 degrees to approximately 15 degrees.

9. The method of claim 1, wherein providing the anvil plate includes providing a tissue contacting surface with an annular configuration.

10. The method of claim 1, wherein positioning the anvil head and the anvil plate in contacting relation includes positioning the anvil plate within an annular recess formed in the anvil head.