US3561441A
Expired / Lapsed
US
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Surgical product for dressing and treating wounds, and method of manufacture
Assignee: VICTOR J LOMBARDI
•
Filing: 1967-08-10
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Granted: 1971-02-09
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Expires: 1987-08-10
Abstract
Abstract An improved surgical fabric for covering and treating wounds and promoting healing thereof is described. The fabric includes nonsticking loops, sheared or unsheared, on at least one face for contacting the wound and for spacing the remainder of the fabric away from the wound. The yarn loops may be synthetic and may include a polyfluorinated polyolefin in filament, spun or plastic ribbon form as a nonsticking material, or may incorporate spun yarns of natural fibers suitably treated to impart nonstick characteristics. The nonsticking loops may be included as part of a knitted fabric construction, and additional, but shorter loops, sheared or unsheared, may be provided in the same fabric for wicking and/or absorbing liquids away from the region of the wound which is being treated. The improved surgical fabric may be produced on small circular knitting machines so as to produce a tubular, seamless fabric which can be placed around a limb or other body portion which is to be covered and treated. Stretch material may be incorporated in the tubular fabric to help prevent the accumulation of wound fluids and to assist in the retention of the dressing on a preferred placement over a wound. Although the fabric is described with reference to important surgical applications, it will be understood that the fabric is generally useful in applications requiring a transmittal and/or absorption of liquid from any surface area, as for example in diaper constructions or constructions for other articles of apparel.
Inventors
- 👤 Victor J Lombardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:46
CPC Classifications
D; D04; D04B; D04B1/00; D04B1/14; D04B1/16; A; A61; A61F; A61F13/00; A61F13/01; A61F13/01008; A61F13/01017; A61F13/01021; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; D04B1/02; D04B1/04; A61F2013/00089; A61F2013/00093; A61F2013/00119; A61F2013/00238; A61F2013/00246; A61F2013/00361; A61F2013/00365; A61F2013/00536; A61F13/15; A61F13/51; A61F13/514; A61F13/51474; A61F2013/51486; A61F2013/51492; D10; D10B; D10B2509/00; D10B2509/02; D10B2509/022
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
17 words
The surgical product of claim 1 wherein said loops include a synthetic yarn having a nonsticking characteristic.
Claim 2
Dependent Claim
21 words
The surgical product of claim 2 wherein said synthetic yarn includes a copolymer of tetrafluoroethylene and hexafluoropropylene to impart nonsticking characteristics.
Claim 3
Dependent Claim
22 words
The surgical product of claim 1 wherein said loops include a film slit in narrow ribbon form and having a nonsticking characterisitc.
Claim 4
Dependent Claim
23 words
The surgical product of claim 4 wherein said film slit in narrow ribbon form includes a homopolymer of tetrafluoroethylene to impart nonsticking characteristics.
Claim 5
Dependent Claim
21 words
The surgical product of claim 1 wherein said loops include a yarn spun with natural fiber and treated for nonsticking characteristics.
Claim 6
Dependent Claim
19 words
The surgical product of claim 2 wherein said synthetic yarn includes a homopolymer of tetrafluoroethylene to impart nonsticking characteristics.
Claim 7
Dependent Claim
25 words
The surgical product of claim 4 wherein said film slit in narrow ribbon form includes a copolymer of tetrafluoroethylene and hexafluoropropylene to impart nonsticking characteristics.
Claim 8
Dependent Claim
17 words
The surgical product of claim 1 wherein said loops include a polyfluorinated polyolefin as a nonsticking material.
Claim 9
Dependent Claim
44 words
The surgical product of claim 1 and including additional loops in said fabric which are of a smaller loop dimension than said loops, whereby said additional loops are normally spaced out of tight contact with a wound when the surgical product is applied thereto.
Claim 10
Dependent Claim
14 words
The surgical product of claim 10 wherein said additional loops have a shrinking characteristic.
Claim 11
Dependent Claim
18 words
The surgical product of claim 11 wherein said additional loops include a polyvinyl chloride as a shrinking material.
Claim 12
Dependent Claim
23 words
The surgical product of claim 11 wherein said additional loops include a polyolefin film slit in narrow ribbon form as a shrinking material.
Claim 13
Dependent Claim
16 words
The surgical product of claim 1 wherein said fabric includes a stretch component in its construction.
Claim 14
Dependent Claim
21 words
The surgical product of claim 1 wherein said product is formed and used as a tubular knitted product having no seams.
Claim 15
Dependent Claim
105 words
An improved surgical product for dressing and treating wounds comprising: a knitted fabric having multilevel loops formed in at least one face in the knitting thereof, said multilevel loops including longer loops formed from a yarn having a nonsticking characteristic and shorter loops formed from a yarn having a wicking or absorption characteristic, said said longer loops being of a sufficient size and number to space said shorter loops out of tight contact with a wound to be covered, whereby adequate ventilation and drainage of the wound is assured, and wherein substantially no sticking or abrading of the wound by the surgical product takes place.
Claim 16
Dependent Claim
108 words
An improved surgical product for dressing and treating wounds comprising: a knitted fabric having multilevel loops formed in at least one face in the knitting thereof, said multilevel loops including longer loops formed from a film slit into narrow ribbons having a nonsticking characteristic and shorter loops formed from a yarn having a wicking or absorption characteristic, said longer loops being of a sufficient size and number to space said shorter loops out of tight contact with a wound to be covered, whereby adequate ventilation and drainage of the wound is assured, and wherein substantially no sticking or abrading of the wound by the surgical product takes place.
Claim 17
Dependent Claim
20 words
The surgical product of claim 16 wherein said Multilevel loops are formed and extend substantially vertically of the ground fabric.
Claim 18
Dependent Claim
21 words
The surgical product of claim 16 wherein said multilevel loops extend substantially horizontally and are formed close to the ground fabric.
Claim 19
Dependent Claim
17 words
The surgical product of claim 19 wherein said multilevel loops are formed randomly in a knitted fabric.
Claim 20
Dependent Claim
25 words
The surgical product of claim 19 wherein said multilevel loops are formed as a lay-in in a knitted fabric at selected wale and course positions.
Claim 21
Dependent Claim
20 words
The surgical product of claim 16 wherein said multilevel loops are formed with yarns of different size at each level.
Claim 22
Dependent Claim
17 words
The surgical product of claim 1 in combination with a separable secondary material for absorbing wound fluids.
Claim 23
Dependent Claim
18 words
The surgical product of claim 16 wherein said longer loops include a polyfluorinated polyolefin as a nonsticking material.
Claim 24
Dependent Claim
18 words
The surgical product of claim 16 wherein said shorter loops include a polyvinyl chloride as a wicking material.
Claim 25
Dependent Claim
17 words
The surgical product of claim 16 wherein loops are formed on two opposite faces of the fabric.
Claim 26
Dependent Claim
29 words
The surgical product of claim 16 wherein multilevel loops are formed on one face of said fabric and additional loops are formed on a second face of the fabric.
Claim 27
Dependent Claim
71 words
The surgical product of claim 27 wherein said multilevel loops on the one face include longer loops having a nonsticking characteristic and shorter loops having a wicking characteristic, and said additional loops on the second face of the fabric being formed from a yarn having an absorption characteristic, whereby liquid matter from the wound is carried through the fabric when said one face of the fabric is placed on the wound.
Claim 28
Dependent Claim
13 words
The surgical product of claim 16 wherein said fabric is a knitted fabric.
Claim 29
Dependent Claim
29 words
The surgical product of claim 16 wherein said fabric and all loops formed therein are knitted on a circular knitting machine so as to produce a seamless, tubular product.
Claim 30
Dependent Claim
17 words
The surgical product of claim 30 wherein said knitted product includes a stretch yarn in the fabric.
Claim 31
Dependent Claim
44 words
The surgical product of claim 30 wherein said knitted tubular product includes a band of stretch material in said fabric to fix the position of said tubular product around a limb or body portion having a wound which is to be dressed and treated.
Claim 32
Dependent Claim
40 words
The surgical product of claim 32 wherein two or more bands of stretch material are incorporated in said tubular product so as to provide compression of said surgical product on opposite sides of a wound being covered by the product.
Claim 33
Dependent Claim
42 words
The surgical product of claim 30 wherein said tubular knitted product includes an area of looped knitting in the portion of the product which is to cover a wound, and plain knitting in areas which are not intended to cover a wound.
Claim 34
Dependent Claim
96 words
An improved surgical product for dressing and treating wounds comprising a knitted fabric having loops formed in at least one face in the knitting thereof, said loops being sheared to form a pile, said sheared loops being located in at least a single level above the knitted fabric, certain of said sheared loops formed with a material having a nonsticking characteristic, and other of said sheared loops formed with a material having a wicking characteristic so that there is adequate ventilation and drainage of the wound with substantially no sticking of the fabric to the wound.
Claim 35
Dependent Claim
46 words
The surgical product of claim 35 wherein the said sheared loops formed with a material having the wicking characteristic also have a shrinking characteristic so that when they are shrunk they contract to a level which is lower than the sheared loops having the nonsticking characteristic.
Claim 36
Dependent Claim
17 words
The surgical product of claim 36 wherein the said loops at a higher level are randomly sheared.
Claim 37
Dependent Claim
36 words
An improved surgical product suitable for dressing and treating wounds comprising a knitted ground fabric incorporating a yarn having a wicking or absorbing characteristic, and loops knitted integrally therewith, said loops exhibiting nonsticking and wicking characteristics.
Claim 38
Dependent Claim
17 words
The surgical product of claim 38 wherein the ground fabric incorporates a yarn having an absorbing characteristic.
Claim 39
Dependent Claim
16 words
The surgical product of claim 38 in combination with a secondary material for absorbing wound fluids.
Claim 40
Dependent Claim
94 words
In a method for forming an improved surgical fabric having at least two levels of loops, with a higher level of loops having a nonsticking characteristic and with a lower level of loops having a wicking characteristic, the improvement comprising the steps of: knitting a looped fabric from at least two different yarns, and utilizing a shrinkable yarn in the fabric as a yarn for forming loops having a wicking characteristic, and treating the fabric to shrink the shrinkable yarn, thereby providing a fabric having wicking loops at a lower level than nonsticking loops.
Claim 41
Dependent Claim
32 words
The method of claim 41 wherein said shrinkable yarn includes a polyvinyl chloride material, and wherein said treating step comprises a step of heating the fabric sufficiently to shrink the shrinkable yarn.
Claim 42
Dependent Claim
35 words
The method of claim 41 and including a step of shearing all loops of the fabric prior to treating the fabric, whereby a fabric having at least two levels of sheared loops will be formed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |