US5120322A
Expired / Lapsed
US
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Method and apparatus for treatment of fibrotic lesions
Assignee: LATHROTEC Inc A CORP OF ARIZONA
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Filing: 1990-06-13
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Granted: 1992-06-09
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Expires: 2010-06-13
Abstract
Abstract A method of controlling scar formation in humans by applying a force to tissue in an amount to create a wound; applying a lathyrogenic agent to the wound; forming the wound into a predetermined stationary or moveable beneficial configuration; and maintaining the wound in the predetermined configuration and in contact with lathyrogenic agent during healing.
Inventors
- 👤 William M. Davis
- 👤 Milos Chvapil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:24
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61K; A61K31/00; A61K31/185; A61K31/19; A61K31/195; A61K31/275; A61M25/104; A61M25/1029; A61M2025/1031; A61M2025/1043; A61M2025/105
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
59 words
A method of controlling scar formation in humans comprising: a) applying a force to tissue in an amount to create a wound; b) applying a lathyrogenic agent to the wound; c) forming the wound into a predetermined stationary or moveable beneficial configuration; and d) maintaining the wound in the predetermined configuration and in contact with lathyrogenic agent during healing.
Claim 2
Independent Claim
59 words
A method of controlling scar formation in humans comprising: a) applying a force to tissue in an amount to create a wound; b) applying a lathyrogenic agent to the wound; c) forming the wound into a predetermined stationary or moveable beneficial configuration; and d) maintaining the wound in the predetermined configuration and in contact with lathyrogenic agent during healing.
Claim 3
Dependent Claim
12 words
The method defined in claim 1 wherein the tissue is scar tissue.
Claim 4
Dependent Claim
13 words
The method defined in claim 1 wherein the tissue is substantially tubularly shaped.
Claim 5
Dependent Claim
27 words
The method defined in claim 3 wherein the substantially tubularly shaped tissue is selected from the group consisting of urethra, esophagus, intestine, fallopian tubes and blood vessels.
Claim 6
Dependent Claim
13 words
The method defined in claim 1 wherein the lathyrogenic agent is B-aminopropionitrile fumarate.
Claim 7
Dependent Claim
47 words
The method defined in claim 3 wherein the step of applying the lathyrogenic agent includes the step of placing the lathyrogenic agent on a catheter and inserting the catheter into the tubularly shaped tissue to a point where the lathyrogenic agent directly and closely contacts the wound.
Claim 8
Dependent Claim
20 words
The method defined in claim 6 wherein the lathyrogenic agent is ionically bonded to an outer portion of the catheter.
Claim 9
Dependent Claim
23 words
The method defined in claim 3 wherein the step of applying force to the tissue includes expanding a balloon catheter against the tissue.
Claim 10
Dependent Claim
32 words
The method defined in claim 3 wherein the step of applying force to the tissue includes inserting a tube into the tissue having a diameter greater than that of the tubular tissue.
Claim 11
Dependent Claim
20 words
The method defined in claim 3 wherein the tissue is maintained in a forced condition by an expanded balloon catheter.
Claim 12
Dependent Claim
28 words
The method defined in claim 3 wherein the tissue is maintained in a forced condition by a tube having a diameter greater than that of the tubular tissue.
Claim 13
Independent Claim
96 words
A method of treating tubular organ stenosis in humans comprising: a) forcefully stretching a fibrotic lesion located inside a tubular shaped human body portion to tear existing scar tissue in the lesion and create a new wound; b) applying B-aminopropionitrile fumarate onto a catheter; c) inserting the catheter into the tubular body portion for a distance to cause B-aminopropionitrile fumarate/wound contact, thereby initiating softening of the wound; and d) retaining the catheter in place to continuously maintain the wound in a stretched condition so that the body portion will substantially retain the size of the catheter.
Claim 14
Independent Claim
96 words
A method of treating tubular organ stenosis in humans comprising: a) forcefully stretching a fibrotic lesion located inside a tubular shaped human body portion to tear existing scar tissue in the lesion and create a new wound; b) applying B-aminopropionitrile fumarate onto a catheter; c) inserting the catheter into the tubular body portion for a distance to cause B-aminopropionitrile fumarate/wound contact, thereby initiating softening of the wound; and d) retaining the catheter in place to continuously maintain the wound in a stretched condition so that the body portion will substantially retain the size of the catheter.
Claim 15
Independent Claim
69 words
A method of reshaping scar tissue in humans comprising: a) stretching scar tissue in an amount to increase flexibility and lengthen or expand the tissue by exposing normal tissue; b) holding the flexible scar tissue in a desired shape; c) applying a lathyrogenic agent to the flexible scar tissue to soften the healing tissue; and d) simultaneously, maintaining the softened, flexible scar tissue in the desired shape during healing.
Claim 16
Independent Claim
69 words
A method of reshaping scar tissue in humans comprising: a) stretching scar tissue in an amount to increase flexibility and lengthen or expand the tissue by exposing normal tissue; b) holding the flexible scar tissue in a desired shape; c) applying a lathyrogenic agent to the flexible scar tissue to soften the healing tissue; and d) simultaneously, maintaining the softened, flexible scar tissue in the desired shape during healing.
Claim 17
Dependent Claim
39 words
The method defined in claim 1 wherein the lathyrogenic agent is contained in a heat denatured collagen-resorcinol-water solution as a vehicle, the mixture is polymerized for releasing slowly and continuously the lathyrogenic agent, thus forming a drug delivery system.
Claim 18
Dependent Claim
33 words
The method of claim 14 wherein the solution comprises about 10 to 30 parts of collagen or gelatin, about 1 to 0.1 parts of resorcinol and about 20 to 40 parts of water.
Claim 19
Dependent Claim
20 words
The method of claim 14 wherein the heat denatured collagen solution is polymerized in the presence of a tanning agent.
Claim 20
Dependent Claim
27 words
The method defined in claim 16 including the steps of coating the collagen mixture with the lathyrogenic agent and polymerizing it on the surface of the wound.
Claim 21
Dependent Claim
51 words
The method defined in claim 1 using a scar inhibiting composition adapted for application to the biological surface, said scar inhibiting composition comprising a lathyrogenic agent and a condensation product of a high molecular weight protein and a dihydric phenol, said condensation product being crosslinked with a biologically nontoxic tanning agent.
Claim 22
Dependent Claim
19 words
The method defined in claim 17 wherein the collagen mixture is in the form of an aerosol spray solution.
Claim 23
Dependent Claim
35 words
The method defined in claim 1 wherein the lathrogenic agent is incorporated into a cream or gauze bandage applied to the skin surface at a concentration of about 40 mg BAPN/100 cm 2 skin area.
Claim 24
Independent Claim
77 words
A method of controlling scar formation in humans comprising: a. applying a force to substantially tubularly shaped tissue in an amount to create a wound, wherein the tissue is selected from the group consisting of urethra, esophagus, intestine, fallopian tubes and blood vessels; b. applying a lathyrogenic agent to the wound; c. forming the wound into a predetermined beneficial configuration; and d. maintaining the wound in a predetermined configuration and in contact with lathyrogenic agent during healing.
Claim 25
Independent Claim
77 words
A method of controlling scar formation in humans comprising: a. applying a force to substantially tubularly shaped tissue in an amount to create a wound, wherein the tissue is selected from the group consisting of urethra, esophagus, intestine, fallopian tubes and blood vessels; b. applying a lathyrogenic agent to the wound; c. forming the wound into a predetermined beneficial configuration; and d. maintaining the wound in a predetermined configuration and in contact with lathyrogenic agent during healing.
Claim 26
Independent Claim
89 words
A method of controlling scar formation in humans comprising: a. applying a force to substantially tubularly-shaped tissue in an amount to create a wound; b. applying a lathyrogenic agent to the wound, wherein the lathyrogenic agent is placed on a catheter and the catheter is inserted into the tubularly-shaped tissue to a point where the lathyrogenic agent directly and closely contacts the wound; c. forming the wound into a predetermined beneficial configuration; and d. maintaining the wound in a predetermined configuration and in contact with lathyrogenic agent during healing.
Claim 27
Independent Claim
89 words
A method of controlling scar formation in humans comprising: a. applying a force to substantially tubularly-shaped tissue in an amount to create a wound; b. applying a lathyrogenic agent to the wound, wherein the lathyrogenic agent is placed on a catheter and the catheter is inserted into the tubularly-shaped tissue to a point where the lathyrogenic agent directly and closely contacts the wound; c. forming the wound into a predetermined beneficial configuration; and d. maintaining the wound in a predetermined configuration and in contact with lathyrogenic agent during healing.
Claim 28
Dependent Claim
20 words
The method defined in claim 22 wherein the lathyrogenic agent is ionically bonded to an outer portion of the catheter.
Claim 29
Independent Claim
59 words
A method of controlling scar formation in humans comprising: a. applying a force to substantially tubularly shaped tissue in an amount to create a wound; b. applying a lathyrogenic agent to the wound; c. forming the wound into a predetermined beneficial configuration; and d. maintaining the wound in a predetermined configuration and in contact with lathyrogenic agent during healing.
Claim 30
Independent Claim
59 words
A method of controlling scar formation in humans comprising: a. applying a force to substantially tubularly shaped tissue in an amount to create a wound; b. applying a lathyrogenic agent to the wound; c. forming the wound into a predetermined beneficial configuration; and d. maintaining the wound in a predetermined configuration and in contact with lathyrogenic agent during healing.
Claim 31
Dependent Claim
23 words
The method defined in claim 24 wherein the step of applying force to the tissue includes expanding a balloon catheter against the tissue.
Claim 32
Dependent Claim
31 words
The method defined in claim 24 wherein the step applying force to the tissue includes inserting a tube into the tissue having a diameter greater than that of the tubular tissue.
Claim 33
Dependent Claim
20 words
The method defined in claim 24 wherein the tissue is maintained in a forced condition by an expanded balloon catheter.
Claim 34
Dependent Claim
28 words
The method defined in claim 24 wherein the tissue is maintained in a forced condition by a tube having a diameter greater than that of the tubular tissue.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-06-09 | 1995-12-09 | 1996-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-09 | 1999-12-09 | 2000-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-09 | 2003-12-09 | 2004-06-09 | $7700.00 | Window Closed / Lapsed |