US5156839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscoelastic fluid for use in spine and general surgery and other surgery and therapies and method of using same
Assignee: FzioMed Inc
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Filing: 1990-06-14
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Granted: 1992-10-20
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Expires: 2010-06-14
Abstract
Abstract This invention relates to an improved viscoelastic fluid or gel for use in general surgery and also more specifically in spine and neurosurgery and also in surgery dealing with reproductive organs. The invention encompasses the method of delivering to a surgical wound an implant composition having up to about a 21/2% by weight of carboxymethylcellulose (CMC) and at least about a 0.5% by weight polyethylene oxide (PEO) in a physiologically acceptable mixture.
Inventors
- 👤 Phillip E. Pennell
- 👤 John M. Blackmore
- 👤 Mark D. Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:29
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0048; A61F; A61F9/00; A61F9/007; A61L; A61L27/00; A61L27/14; A61L27/26
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
53 words
A method of preventing scar formation in sterile parts of the body during and following surgery comprising the step of: delivering to a wound an implant composition having up to about 21/2% by weight of carboxymethylcellulose (CMC) and up to about 0.5% by weight of polyethylene oxide (PEO) in a physiologically acceptable mixture.
Claim 2
Independent Claim
53 words
A method of preventing scar formation in sterile parts of the body during and following surgery comprising the step of: delivering to a wound an implant composition having up to about 21/2% by weight of carboxymethylcellulose (CMC) and up to about 0.5% by weight of polyethylene oxide (PEO) in a physiologically acceptable mixture.
Claim 3
Dependent Claim
66 words
The method of claim 1 wherein prior to delivery, the implant composition of about 2.5% by weight of carboxymethylcellulose (CMC) and about 0.5% by weight of polyethylene oxide (PEO) in a physiologically acceptable mixture is crosslinked in order to control retention at the wound by including about 0.25% by weight of dimethyl urea a crosslinking agent and about 0.025% by weight ammonium chloride as a catalyst.
Claim 4
Dependent Claim
20 words
The method of claim 1 including the step of: allowing the delivered implant composition to be absorbed into the wound.
Claim 5
Dependent Claim
55 words
The method of claim 1 including the step of: preparatory to the delivering step, cutting through the skin and topically applying to the subcutaneous tissue prior to surgical dissection a topical composition having upto about 1% by weight of carboxymethylcellulose(CMC) and upto about 0.05% by weight of polyethylene oxide (PEO) in a physiologically acceptable mixture.
Claim 6
Dependent Claim
18 words
The method of claim 4 including the step of: removing the topical composition before delivering the implant composition.
Claim 7
Independent Claim
61 words
A method of preventing scar formation in sterile parts thereof during and following the performance of surgical procedures on reproductive organs of a mammal comprising the step of: delivering to a wound an implant composition having up to about 21/2% by weight of carboxymethylcellulose (CMC) and up to about 0.5% by weight of polyethylene oxide (PEO) in a physiologically acceptable mixture.
Claim 8
Independent Claim
61 words
A method of preventing scar formation in sterile parts thereof during and following the performance of surgical procedures on reproductive organs of a mammal comprising the step of: delivering to a wound an implant composition having up to about 21/2% by weight of carboxymethylcellulose (CMC) and up to about 0.5% by weight of polyethylene oxide (PEO) in a physiologically acceptable mixture.
Claim 9
Dependent Claim
66 words
The method of claim 6 wherein prior to delivery, the implant composition of about 2.5% by weight of carboxymethylcellulose (CMC) and about 0.5% by weight of polyethylene oxide (PEO) in a physiologically acceptable mixture is crosslinked in order to control retention at the wound by including about 0.25% by weight of dimethyl urea a crosslinking agent and about 0.025% by weight ammonium chloride as a catalyst.
Claim 10
Dependent Claim
20 words
The method of claim 6 including the step of: allowing the delivered implant composition to be absorbed into the wound.
Claim 11
Dependent Claim
55 words
The method of claim 6 including the step of: preparatory to the delivering step, cutting through the skin and topically applying to the subcutaneous tissue prior to surgical dissection a topical composition having upto about 1% by weight of carboxymethylcellulose(CMC) and upto about 0.05% by weight of polyethylene oxide (PEO) in a physiologically acceptable mixture.
Claim 12
Dependent Claim
18 words
The method of claim 9 including the step of: removing the optical composition before delivering the implant composition.
Claim 13
Dependent Claim
38 words
The method of claim 6 including the step of: preparatory to the delivering step, surgically accessing the reproductive organs of a mammal and performing modifications to the reproductive organs at the wound created by the surgical accessing step.
Claim 14
Independent Claim
53 words
A method of preventing scar formation in sterile parts of the body during and following spine surgery comprising the step of: delivering to a wound an implant composition having up to about 21/2% by weight of carboxymethylcellulose (CMC) and up to about 0.5% by weight polyethylene oxide (PEO) in a physiologically acceptable mixture.
Claim 15
Independent Claim
53 words
A method of preventing scar formation in sterile parts of the body during and following spine surgery comprising the step of: delivering to a wound an implant composition having up to about 21/2% by weight of carboxymethylcellulose (CMC) and up to about 0.5% by weight polyethylene oxide (PEO) in a physiologically acceptable mixture.
Claim 16
Dependent Claim
66 words
The method of claim 12 wherein prior to delivery, the implant composition of about 2.5% by weight of carboxymethylcellulose (CMC) and about 0.5% by weight of polyethylene oxide (PEO) in a physiologically acceptable mixture is crosslinked in order to control retention at the wound by including about 0.25% by weight of dimethyl urea a crosslinking agent and about 0.025% by weight ammonium chloride as a catalyst.
Claim 17
Dependent Claim
20 words
The method of claim 12 including the step of: allowing the delivered implant composition to be absorbed into the wound.
Claim 18
Dependent Claim
55 words
The method of claim 12 including the step of: preparatory to the delivering step, cutting through the skin and topically applying to the subcutaneous tissue prior to surgical dissection a topical composition having upto about 1% by weight of carboxymethylcellulose(CMC) and upto about 0.05% by weight of polyethylene oxide (PEO) in a physiologically acceptable mixture.
Claim 19
Dependent Claim
18 words
The method of claim 15 including the step of: removing the topical composition before delivering the implant composition.
Claim 20
Dependent Claim
28 words
The method of claim 12 including the step of: preparatory to the delivering step, surgically accessing the spine and performing modifications to the spine at the wound created.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-20 | 1996-04-20 | 1996-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-20 | 2000-04-20 | 2000-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-20 | 2004-04-20 | 2004-10-20 | $7700.00 | Window Closed / Lapsed |