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EP0196821A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Tissue expander system

Assignee: PMT Inc
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Filing: 1986-03-19
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Granted: —
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Expires: 2006-03-19
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Abstract

Abstract Tissue expander system including a tissue expander, an injection port, and a tube connecting the tissue expander to the injection port. The tissue expander is of a one piece molded body of a pancake to waffle like configuration. Within the one piece molded body is a member of non-stick material of a slightly smaller geometrical shape simular to that of the one piece molded body. A self-sealing valve member closes off the tube in the tissue expander after injection of a solution for expanding the tissue expander. A dacron mesh can be embedded in members of the one piece body providing for directional expansion of the tissue expander. In an alternative embodiment, dacron mesh can be provided in both the upper and lower members of the one piece body. An accordion configured perimeter also provides for upward directional expansion. The tissue expanders can assume any geometrical configuration, whether it be square, rectangular, circular, oval, or kidney shaped. The tissue expander can also be a small enough size for hands and toes, a miniature size for use on the face, or a large size for use on the chest or other body area. A self-sealing injection port can be domed or cylindrical, and includes a stainless steel bottom, as well as a dacron mesh impregnated silicon top. The stainless steel bottom provides for limiting injection needle penetration and for injection port location during X-ray procedure.

Inventors

  • 👤 William J. Eastman
  • 👤 Alfred A. Iversen
  • 👤 Allen Van Beek

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 12:14
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/0059; A61B; A61B90/00; A61B90/02; A61B90/39; Y; Y10; Y10S; Y10S128/00; Y10S128/14; Y10S128/20; Y10S128/21

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 99 words
Tissue expander for insertion between skin and flesh comprising: a. one piece molded member of an expandable material and a finite thickness and assuming a predetermined geometrical shape, said member including a lower surface and an upper surface with a molded edge formed by said surfaces, and an internal cavity therein; b. tube means secured to and extending partially into said cavity providing for fluid to pass into said member; and c. at least one sheet of non-stick material positioned between said upper and lower surface assuming said geometrical shape, and adjacent to an inner portion of said edge.
Claim 2
Dependent Claim 99 words
Tissue expander for insertion between skin and flesh comprising: a. one piece molded member of an expandable material and a finite thickness and assuming a predetermined geometrical shape, said member including a lower surface and an upper surface with a molded edge formed by said surfaces, and an internal cavity therein; b. tube means secured to and extending partially into said cavity providing for fluid to pass into said member; and c. at least one sheet of non-stick material positioned between said upper and lower surface assuming said geometrical shape, and adjacent to an inner portion of said edge.
Claim 3
Dependent Claim 27 words
A tissue expander according to claim 1, comprising at least two sheets of non-stick material between said surfaces, said tube means extending in between said two sheets.
Claim 4
Dependent Claim 21 words
A tissue expander according to claim 1 or 2, wherein said lower surface includes a mesh disposed within said lower surface.
Claim 5
Dependent Claim 21 words
A tissue expander according to claim 1, 2 or 3, wherein said edge includes accordion expansion means providing for directional expansion.
Claim 6
Dependent Claim 26 words
A tissue expander according to any of the preceding claims, including injection port means connected to said tube means for passing of fluid to said member.
Claim 7
Dependent Claim 17 words
A tissue expander according to claim 5, wherein said inj ection port includes a raised dome member.
Claim 8
Dependent Claim 95 words
Tissue expander comprising: a, one piece molded silicon rubber member of a finite thickness and of a predetermined geometrical shape, said member including a lower surface and an upper surface, a molded edge formed at a junction of said surfaces, and a cavity formed therein; b. tube means extending into said cavity at said edge providing for fluid to pass into said member; and, c. two sheets of non-stick material between said surfaces and an end of said tube, said material of a smaller surface area than that of said geometrical shape of said surfaces.
Claim 9
Dependent Claim 95 words
Tissue expander comprising: a, one piece molded silicon rubber member of a finite thickness and of a predetermined geometrical shape, said member including a lower surface and an upper surface, a molded edge formed at a junction of said surfaces, and a cavity formed therein; b. tube means extending into said cavity at said edge providing for fluid to pass into said member; and, c. two sheets of non-stick material between said surfaces and an end of said tube, said material of a smaller surface area than that of said geometrical shape of said surfaces.
Claim 10
Dependent Claim 101 words
Tissue expander comprising: a. one piece molded member of a finite thickness and of a predetermined geometrical shape, said member including a lower surface and an upper surface, a molded edge formed at a junction of said surfaces, and a cavity formed therein; b. tube means extending into said member at said edge providing for fluid to pass into said member including a valve means for checking fluid flow; and, c. one sheet of non-stick material between said surfaces and an end of said tube, said material of a smaller surface area than that of said geometrical shape of said surfaces.
Claim 11
Dependent Claim 101 words
Tissue expander comprising: a. one piece molded member of a finite thickness and of a predetermined geometrical shape, said member including a lower surface and an upper surface, a molded edge formed at a junction of said surfaces, and a cavity formed therein; b. tube means extending into said member at said edge providing for fluid to pass into said member including a valve means for checking fluid flow; and, c. one sheet of non-stick material between said surfaces and an end of said tube, said material of a smaller surface area than that of said geometrical shape of said surfaces.
Claim 12
Dependent Claim 21 words
A tissue expander according to claim 8, wherein said valve means comprises a flap of said material about said tube means.
Claim 13
Dependent Claim 39 words
10, Surgical expansion device comprising: a. expandable geometrical chamber member having opposing surfaces; b. geometrical section of non-stick material internal to said expandable member; and, c. means connected to said member for inputting fluid for expansion of said member.
Claim 14
Dependent Claim 39 words
10, Surgical expansion device comprising: a. expandable geometrical chamber member having opposing surfaces; b. geometrical section of non-stick material internal to said expandable member; and, c. means connected to said member for inputting fluid for expansion of said member.

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