Transdermal intraosseous device

• US 9,254,194 B2
• Filed: 08/19/2013
• Issued: 02/09/2016
• Est. Priority Date: 02/01/2010
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Porter, Joshua R., Hershberger, Troy W.
• Primary Examiner(s): Carter, Monica
• Assistant Examiner(s): BERONJA, LAUREN M
• Application Number:
  US13/969,693
• Publication Number:
  US 20130337724A1
• Time in Patent Office: 904 Days
• Field of Search: 451/57, 451/29, 451/31, 451 38- 40, 451/75, 623/27, 623/32, 623/38
• US Class Current: 1/1
• CPC Class Codes: A61B 17/60 for external osteosynthesis, e.g. distractors, contractors
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/2814 Bone stump caps
• CPC Class Codes: A61F 2/30749 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2/78 Means for protecting prostheses or for attaching them to the body, e.g. bandages, harnesses, straps, or stockings for the limb stump
• CPC Class Codes: A61F 2002/7887 for connecting limb exoprostheses to the stump bone
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2250/0023 differing in porosity
• CPC Class Codes: A61F 2250/0025 differing in roughness
• CPC Class Codes: B24C 1/04 for treating only selected parts of a surface, e.g. for carving stone or glass

Abstract

A transdermal intraosseous device includes a transdermal adapter for an external prosthetic device for a bone of a patient and a bone fixator including a distal portion coupled to the transdermal adapter and a proximal portion for anchoring into the bone. The transdermal adapter includes a dome-shaped portion for transcutaneous implantation and an external shaft extending from the dome-shaped portion. A dermal transition structure is configured to include a controlled roughness gradient from the external shaft to the dome-shaped portion and configured for use in infection control at a dermis layer of the patient.

Claims

1. A method for forming a controlled roughness gradient transition between an external prosthetic device for a bone of a patient and the corresponding dermis of the patient, the method comprising:

positioning a porous metal dome-shaped structure around a metal dome-shaped portion of a transdermal adapter;

roughening a first portion of an external shaft extending from the dome-shaped portion of the transdermal adapter by blasting to a first roughness, the first portion extending above the porous metal dome-shaped structure along a longitudinal axis of the external shaft, the first portion is adjacent the porous metal dome-shaped structure; and

roughening a second portion of the external shaft by a combination of blasting and acid etching to a second roughness, the second portion extending above the first portion along the longitudinal axis of the external shaft, both the first portion and the second portion are between a sidewall of the external shaft and the porous metal dome-shaped structure such that the second porous portion abuts the sidewall;

wherein the porous metal dome-shaped portion and the first and second portions of the external shaft are configured to directly contact the dermis for infection control; and

wherein the first and the second portions provide a gradual transition from a polished portion of the external shaft to a rough surface of the porous metal dome-shaped structure through the first and the second portions of the external shaft.

2. The method of claim 1, wherein the porous metal dome-shaped structure has an average porosity of about 67 percent.

3. The method of claim 1 wherein the porous metal dome-shaped structure has pore size ranging from about 100 to about 600 microns.

4. The method of claim 1, wherein the porous metal dome-shaped structure has average pore size of about 300 microns.