Tissue marking implant

• US 8,668,737 B2
• Filed: 03/21/2012
• Issued: 03/11/2014
• Est. Priority Date: 10/10/1997
• Status: Expired due to Term

• Current Assignee: Senorx Incorporated (Becton, Dickinson & Co)
• Original Assignee: Senorx Incorporated (Becton, Dickinson & Co)
• Inventors: Corbitt, John D. Jr.
• Primary Examiner(s): GHERBI, SUZETTE JAIME J
• Application Number:
  US13/426,061
• Publication Number:
  US 20120179251A1
• Time in Patent Office: 720 Days
• Field of Search: 623 111- 148, 623 7- 8
• US Class Current: 623/7
• CPC Class Codes: A61B 2090/3908 Soft tissue, e.g. breast tissue
• CPC Class Codes: A61F 2/0059 Cosmetic or alloplastic implants A61F2/10 - A61F2/16, A61F2/28 take precedence
• CPC Class Codes: A61F 2/0077 Special surfaces of prostheses, e.g. for improving ingrowth A61F2/30767 takes precedence
• CPC Class Codes: A61F 2/12 Mammary prostheses and implants
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2210/0066 shrinkable
• CPC Class Codes: A61L 27/18 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 27/36 containing ingredients of undetermined constitution or reaction products thereof , e.g. transplant tissue, natural bone, extracellular matrix isolated natural compounds, e.g. collagen A61L27/24
• CPC Class Codes: A61L 27/56 Porous materials, e.g. foams or sponges
• CPC Class Codes: A61L 27/58 Materials at least partially resorbable by the body
• CPC Class Codes: C08L 67/04 Polyesters derived from hydroxycarboxylic acids, e.g. lactones C08L67/06 takes precedence

Abstract

An implant for marking an area within a living body includes a matrix material and a marking material. The implant is formable to fit the shape and size of a cavity in the human body. The implant is configured to support tissue surrounding the cavity and to allow in-growth of fibrous tissue into and replace at least a portion of the matrix material.

Claims

1. An implant for marking an area within a surgically formed cavity in tissue of a living body comprising a matrix material and a marking material, the implant being formable to fit the shape and size of the surgically formed cavity in the tissue of the living body, the implant being configured to fill the surgically formed cavity in the tissue and support the tissue that surrounds the surgically formed cavity, and configured to allow in-growth of fibrous tissue into and replace at least a portion of the matrix material, wherein the matrix material comprises a foamed bioabsorbable protein.

2. An implant for marking an area within a surgically formed cavity in tissue of a living body comprising a matrix material and a marking material, the implant being formable to fit the shape and size of the surgically formed cavity in the tissue of the living body, the implant being configured to fill the surgically formed cavity in the tissue and support the tissue that surrounds the surgically formed cavity, and configured to allow in-growth of fibrous tissue into and replace at least a portion of the matrix material, wherein the matrix material comprises a foamed collagen.

3. A tissue marking implant for marking a breast cavity formed in a breast, comprising:

a matrix having a porous structure configured to support surrounding tissue of the breast and configured to provide a framework for the in-growth of fibrous tissue into the matrix; and

a dye marker supported by the matrix and configured for dispersion into the tissue surrounding the breast cavity.

4. The tissue implant of claim 3, wherein the matrix comprises a collagen foam.

5. The tissue implant of claim 3, wherein the matrix comprises a resilient framework for implantation with the matrix compressed into a volume smaller than the breast cavity, the resilient framework being configured to expand resiliently within the breast.

6. The tissue implant of claim 3, wherein the matrix is self-expanding.