Method for tissue growth

• US 20070059345A1
• Filed: 04/23/2004
• Published: 03/15/2007
• Est. Priority Date: 04/24/2003
• Status: Abandoned Application

• Current Assignee: Craig Mclachlan
• Original Assignee: Craig Mclachlan
• Inventors: McLachlan, Craig
• Application Number:
  US10/554,348
• Publication Number:
  US 20070059345A1
• Time in Patent Office: Days
• US Class Current: 424/443
• CPC Class Codes: A61B 17/34 Trocars; Puncturing needles pointed biopsy instruments A61B10/0233; devices for piercing the ear-lobes A44C7/001; seals or hemostasis valves A61M39/06
• CPC Class Codes: A61B 17/3468 for implanting or removing devices, e.g. prostheses, implants, seeds, wires devices for implanting seeds A61M37/0069
• CPC Class Codes: A61B 2017/00243 cardiac
• CPC Class Codes: A61B 2017/00247 Making holes in the wall of the heart, e.g. laser Myocardial revascularization
• CPC Class Codes: A61B 2018/00392 Transmyocardial revascularisation
• CPC Class Codes: A61F 2/0077 Special surfaces of prostheses, e.g. for improving ingrowth A61F2/30767 takes precedence

Abstract

A method for promoting or stimulating growth of tissue (22) comprising providing an element (23) which is adapted to receive blood, locating the element (23) in contact with the tissue (23) with at least one portion of the element (23) extending away from an external surface of the tissue (22), and conditioning the element (23) by introducing blood into said at least one portion whereby, when located in contact with the tissue, the conditioned element (23) is arranged to stimulate or promote growth of tissue in (27) and from (28) the at least one portion.

Claims

1. A method for promoting or stimulating growth of tissue comprising the following steps:

providing an element which is adapted to receive blood;

locating the element in contact with the tissue with at least one portion of the element extending away from an external surface of the tissue; and

conditioning the element by introducing blood into said at least one portion whereby, when located in contact with the tissue, the conditioned element is arranged to stimulate or promote growth of tissue in and from the at least one portion.

2. The method of claim 1 wherein angiogenesis is stimulated or promoted in the at least one portion.

39. The method of claim 1 wherein angiogenesis is stimulated or promoted from the at least one portion.

40. The method of claim 1 wherein arteriogenesis is stimulated or promoted in the at least one portion.

41. The method of claim 1 wherein arteriogenesis is stimulated of promoted from the at least one portion.

42. The method of claim 1 wherein at least one surface of the at least one portion of the element is in contact with the external surface of the tissue.

43. The method of claim 1 wherein the blood is introduced into said at least one portion from a wound.

44. The method of claim 43 wherein the wound is formed in the tissue.

45. The method of claim 44 wherein the element introduces blood into the at least one portion by absorption, capillary action or suction.

46. The method of claim 1 wherein the element is a sponge-like structure.

47. The method of claim 46 wherein the sponge-like structure is formed from polyurethane.

48. The method of claim 1 wherein the at least one portion of the element is a sheet-like structure and at least one surface of the at least one portion is in contact with a portion of the external surface of the tissue.

49. The method of claim 1 wherein the element is an elongate member having at least one surface of the at least one portion in contact with a portion of the external surface of the tissue.

50. The method of claim 1 wherein the at least one portion is in contact with at least one wound in the tissue.

51. The method of claim 1 wherein at least one surface of the at least one portion extends along and in contact with the external surface of the tissue between and in contact with at least two wounds.

52. The method of claim 1 wherein at least one surface of the at least one portion is in contact with a portion of the external surface of the tissue, and at least one other portion is in contact with one or more wounds to receive blood from the wounds, the at least one other portion being in fluid communication with the at least one portion.

53. The method of claim 1 wherein the tissue is muscle tissue.

54. The method of claim 53 wherein the tissue is cardiac tissue.

55. The method of claim 54 wherein the cardiac tissue is ischaemic cardiac tissue.

56. The method of claim 1 wherein the tissue is pancreatic tissue.

57. The method of claim 1 wherein the tissue is an aorta.

71. The method of claim 1 wherein the element comprises a mesh formed from knitted or woven yarn, wherein the mesh or yarn is coated with polyuyrethane or polyurethane polycarbonate.

3-38. -38. (canceled)

58. A method for treating ischaemic tissue comprising the following steps:

providing an element which is adapted to receive blood;

locating the element in contact with the ischaemic tissue with at least one portion of the element extending away from an external surface of the tissue; and

conditioning the element by introducing blood into said at least one portion whereby, when located in contact with the ischaemic tissue, the conditioned element is arranged to stimulate or promote growth of tissue in and from the at least one portion.

59. A method for treating ischaemic cardiac tissue comprising the following steps:

providing an element which is adapted to receive blood;

locating the element with at least one portion of the element in contact with the epicardial external surface of the ischaemic cardiac tissue; and

conditioning the element by introducing blood into the at least one portion wherein the growth of tissue is stimulated or promoted in and from the at least one portion into the ischeamic cardiac tissue.

60. A method for treating ischaemic heart disease comprising the following steps:

providing an element which is adapted to receive blood;

locating the element with at least one portion of the element in contact with the epicardial external surface of ischaemic cardiac tissue; and

conditioning the element by introducing blood into the at least one portion wherein the growth of tissue is stimulated or promoted in and from the at least one portion into the ischaemic cardiac tissue.

61. A method for treating myocardial infarction comprising the following steps:

providing an element which is adapted to receive blood;

locating the element with at least one portion of the element in contact with an epicardial external surface of infarcted myocardial tissue; and

conditioning the element by introducing blood into said at least one portion to stimulate or promote growth of tissue in and from the at least one portion into the infracted myocardial tissue.

62. A method for promoting or stimulating growth of tissue comprising the following steps:

providing an element which is adapted to receive blood;

locating the element in contact with the tissue with at least one portion of the element extending away from the surface of the tissue; and

conditioning the element by introducing blood into said at least one portion whereby, when located in contact with the tissue, the conditioned element is arranged to stimulate or promote angiogenesis in and from the at least one portion.

63. A method for promoting or stimulating growth of tissue comprising the following steps:

providing an element which is adapted to receive blood;

locating the element in contact with the tissue with at least one portion of the element extending away from the external surface of the tissue; and

conditioning the element by introducing blood into said at least one portion whereby, when located in contact with the tissue, the conditioned element is arranged to stimulate or promote arteriogenesis in and from the at least one portion.

64. A method for promoting or stimulating growth of tissue comprising the following steps:

providing an element which is adapted to receive blood;

locating the element in contact with the tissue with at least one portion of the element extending away from the external surface of the tissue; and

conditioning the element by introducing blood into said at least one portion whereby, when located in contact with the tissue, the conditioned element is arranged to stimulate or promote angiogenesis and arteriogenesis in and from the at least one portion.

65. A method for promoting or stimulating growth of tissue comprising the following steps:

providing an element which is adapted to receive blood;

locating the element in contact with the tissue with at least one portion of the element extending away from the external surface of the tissue; and

conditioning the element by introducing blood into said at least one portion whereby, when located in contact with the tissue, the conditioned element is arranged to stimulate or promote angiogenesis in, and arteriogenesis from, the at least one portion.

66. A method for promoting or stimulating growth of tissue comprising the following steps:

providing an element which is adapted to receive blood;

locating the element in contact with the tissue with at least one portion of the element extending away from the external surface of the tissue; and

conditioning the element by introducing blood into said at least one portion whereby, when located in contact with the tissue, the conditioned element is arranged to stimulate or promote arteriogenesis in, and angiogenesis from, the at least one portion.

67. A growth promoting or growth stimulating element comprising a mesh formed from knitted or woven yarn or fibre, wherein the mesh is coated with polyurethane or polyurethane polycarbonate.

68. The element of claim 67 wherein the yarn or fibre is formed from one or more materials selected from the group consisting of cotton, linen, silk, knitted silkworm silk, insect silk, a polyamide, polyhexamethylene sebacamide, polycapramide, polydodecanamide, polyhexamethylene isophthalamide, a polyester, a fluoropolymer, a polyolefin, and polyethylene.

69. The element of claim 67 wherein the yarn or fibre is formed from one or more materials selected from the group consisting of an aliphatic polyester, a glycolide, glycolic acid, epsilon-caprolactone, p-dioxanone (1,4-dioxan-2-one), trimethylene carbonate (1,3-dioxan-2-one), an alkyl derivative of trimethylene carbonate, delta-valerolactone, beta-butyrolactone, gamma-butyrolactone, epsilon-decalactone, hydroxybutyrate, hydroxyvalerate, 1,4-dioxepan-2-one, 1,5,8,12-tetraoxacyclotetradecane-7,14-dione, 1,5-dioxepan-2-one, 6,6-dimethyl-1,4-dioxan-2-one, polyglactin 910 (Vicryl), polyglycolic acid (Dexon), and a blend of any of the foregoing polymers.

70. The element of claim 67 wherein the mesh is coated with the polyurethane or polyurethane polycarbonate after the mesh is woven or knitted.

72. A growth promoting or stimulating element adapted to receive blood, the element comprising a porous matrix comprising an polymer or polymer coating, the matrix being adapted to receive blood and sized to fit within a wound in a tissue, such that when the element is located in contact with the tissue with at least one portion of the element extending away from an external surface of the tissue, and when the element is conditioned by introducing blood into at least one portion of the element, growth of the tissue is promoted or stimulated in and from the at least one portion of the element.