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Publication numberUS3900024 A
Publication typeGrant
Publication dateAug 19, 1975
Filing dateJan 28, 1974
Priority dateJan 28, 1974
Publication numberUS 3900024 A, US 3900024A, US-A-3900024, US3900024 A, US3900024A
InventorsCowden Ernest A, Lauber Leo E
Original AssigneeCowden Ernest A, Lauber Leo E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Orthopedic cast and method of constructing same
US 3900024 A
Abstract
An improved plaster cast and method of preparing it are provided by the present invention. The cast is formed from a casting blank prepared in a novel manner. A first sheet of deformable, water absorptive material is placed on a supporting surface and a plurality of plaster splints are aligned on the sheet. A second sheet of the deformable, water absorptive material is then placed over the first sheet to sandwich the plaster splints between the two sheets. The edges of the sheets are then bonded together to enclose the plaster splints within the deformable, water absorptive material to form the casting blank. When the blank is to be used to form a cast for a portion of the body, it is first saturated with water then shaped around the body portion. The shaped cast is then wrapped with an adhesive or elastic tape to hold it in place while it dries.
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United States Patent [191 Lauber et al.

1 ORTHOPEDIC CAST AND METHOD OF CONSTRUCTING SAME [76] lnventorsz' Leo E. Lauber, 821 Locust, Eudora,

Kans. 66025; Ernest A. Cowden, 7405 Sloan, Kansas City, Kans. 66109 [22] Filed: Jan. 28, 1974 21 Appl. No.: 437,522

[52] US. Cl 128/91 R [51] Int. Cl. A6lf 5/04 [58] Field of Search 128/91 R, 90

[56] References Cited UNITED STATES PATENTS 797,510 8/1905 Fuhrhans 128/91 R 937,478 10/1909 Sims 128/91 R 1,131,295 3/1915 Touart.... 128/91 R 2,530,986 11/1950 Moses 128/91 R 2,692,596 10/1954 Marconnet. 128/91 R 2,960,984 1l/l960 Parker 128/91 R 3,048,169 8/1962 Pierce 128/90 3,135,258 6/1964 Billings et al. 128/91 R 3,197,534 7/1965 Murray 128/91 R 3,373,741 3/1968 Hill et al. 128/90 4 1 Aug. 19, 1975 3,728,206 4/1973 Buese 128/90 Primary Examiner-Richard A. Gaudet Assistant Examiner.1. Yasko Attorney, Agent, or Firm-Lowe, Kokjer, Kircher, Wharton & Bowman [5 7 ABSTRACT An improved plaster cast and method of preparing it are provided by the present invention. The cast is formed from a casting blank prepared in a novel manner. A first sheet of defonnable, water absorptive material is placed on a supporting surface and a plurality of plaster splints are aligned on the sheet. A second sheet of the deformable, water absorptive material is then placed over the first sheet to sandwich the plaster splints between the two sheets. The edges of the sheets are then bonded together to enclose the plaster splints within the deformable, water absorptive material to form the casting blank. When the blank is to be used to form a cast for a portion of the body, it is first saturated with water then shaped around the body portion. The shaped cast is then wrapped with an adhesive or elastic tape to hold it in place while it dries.

5 Claims, 6 Drawing Figures pmmgmum 91915 Ollt'lfllUlPlElDlC CAST AND METHOD 01E" CONSTRUCTHNG SAME This invention relates generally to orthopedics and more specifically to an improved orthopedic cast and method on constructing same.

Plaster casts have been used in the healing arts for many years to immobilize and hold in place a fractured bone. Construction of a plaster cast is a time consuming procedure requiring a high degree of skill. Normal procedure is for the dry plaster ingredients to be impregnated in a gauze cloth to form what is commonly referred to as a plaster splint. After the fractured bone is set in place, and the attendant portion of the body is covered with a soft cloth, a number of the plaster splints are moistened and carefully wrapped around the body portion. A minimum of six and as many as fifteen or twenty splints are utilized to form a multiple layered immobilizing cost. As each splint must be moistened and then carefully laid over the preceding splint followed by wrapping of the splint around the body portion, this is a very time consuming procedure. The person applying the cast must be very careful to control the amount of moisture applied to the individual splints as too much moisture will weaken the cast and too little moisture will result in non-adherence of the individual splints to each other which also causes a weak spot.

Because of the great amount of time as well as skill that is required to construct a conventional plaster cast, it has been impossible to utilize such casts on an emergency basis to immobilize a broken bone at the scene of an accident. While in many instances such temporary immobilization would greatly facilitate transfer of the patient to a medical center and possibly prevent further and more serious injury, it has not been possible to utilize plaster casts on such an emergency basis.

lt is therefore a primary object of the present invention to provide an immobilizing orthopedic cast which can be constructed in a fraction of the time as required for a conventional plaster cast and can therefore be utilized on an emergency and temporary basis at the scene of an accident for facilitating transfer of the patient to a medical center.

As a corollary to the above object, it is an important aim of this invention to provide an immobilizing orthopedic cast which can be constructed by paramedical personnel having a minimal amount of training as compared with the amount of training necessary for a person to be qualified to construct a conventional plaster cast.

lt is still another objective of my invention to provide an orthopedic cast which is easier and quicker to construct than a conventional plaster cast and is also more comfortable for the patient to wear because of the incorporation into the cast as an integral part of a resilient layer of material between the rigid plaster and the patients body.

Still another object of this invention is to provide a method of constructing a cast for permanently setting a fractured bone that is easier for a doctor to utilize because of the elimination of the multiple steps required in building a multiple layered cast from individual splints Other objects of the invention will become apparent or be made clear from a reading of the following de scription and claims in light of the accompanying drawing.

In the drawing:

lFlG. i is a top plan view with portions broken away of a casting blank constructed according to the present invention for use in the inventive method of constructing a cast;

H6. 2 is a perspective view illustrating how the casting blank would be placed to form a cast around the ankle and foot;

FIG. 3 is a side elevational view of the ankle and foot shown in F l6. 2 with the casting blank shaped to conform to the shape of this portion of the body;

FIG. i is a side elevational view of a portion of the elbow and upper and lower arm of a person encased within a cast constructed according to the teachings of the present invention;

FIG. 5 is a side elevational view, similar to FIG. 4, and illustrating a further step which may be utilized in constructing a cast according to the method of the present invention; and

FIG. 6 is another side view of the arm and elbow shown in FlGS. 4- and 5 with the completed cast therearound.

Referring initially to FIG. 1, the present invention encompasses a novel casting blank 10 and a method of constructing it. A first sheet 12 of deformable water absorptive resilient material is placed on a working surface and trimmed to an appropriate size. While a cellular material such as foam rubber or urethane foam is preferred because of its high water absorption and resiliency, it will be appreciated that other equivalent materials which are deformable and water absorptive may be utilized. A number. of plaster splints 14 are then placed over sheet 12 in general alignment with the lat ter. Each splint 14 is of a construction well known to those skilled in the art and normally comprises a layer of gauze cloth impregnated with the dry plaster ingredients. It is to be understood, however, that the term plaster splint as used in this application is intended to include any plaster-like material which will harden after water has been added, impregnated in a carrier such as the gauze cloth. While it is much preferred to utilize the plaster splints l4, for some applications it is possible to utilize the dry plaster ingredients without the cloth carrier strips.

The number of plaster splints 14 may also be varied in accordance with the requirements for the particular cast being constructed. For most applications at least six of the splints 14 will be required to give the necessary support and additional splints may be utilized as needed.

A second sheet 16 of the same water absorptive deformable material as the first sheet 12 is trimmed to the appropriate size and placed over the splints 14 on the first sheet. The sheets 12 and 16 are each of a size such that they present a surface area larger than the surface area of the splints 14 so that the edges of the sheets extend beyond the edges of the splints.

Next, the-edges of sheets 12 and 16 are joined together preferably through use of a suitable adhesive. The completed casting blank 10 will thus comprise upper and lower layers of a resilient deformable water absorptive material with a quantity of plaster sandwiched between the two layers. It has been found helpful to provide a centering ring 18 imprinted on the surface of one of the sheets to facilitate centering of a portion of the body such as foot 20 to be enclosed within the cast formed from blank 10.

When a cast is to be constructed from blank 10, the latter is saturated with water to activate the chemical reaction that will harden the plaster. Because splints 14 are enclosed within sheets 12 and 16, the amount of water utilized is easier to control. Generally, by submerging blank for from to 40 seconds, the sheets 12 and 16 will become saturated and an adequate but not excessive quantity of water is available for splints l4. Excess water is drained and pressed from blank 10 before the latter is moved into position for shaping around foot 20. The blank is shaped around the foot to conform to the shape of the latter by folding and kneading it into place. The completed cast as illustrated in FIG. 3 and designated by the numeral 22 will normally harden in 10 minutes or less although this time may be accelerated by the application of warm air.

The blank 10 is illustrated in FIG. 3 shaped into an elbow cast 24. It will generally be preferred for a cast formed from blank 10 to be wrapped with tape 26 to hold the cast in place while it is drying. Tape 26 may be an inelastic adhesive type or may comprise an elastic material commonly referred to as an elastic bandage. The tape remains in place after the plaster cast hardens and provides some additional support for the cast as well as a degree of protection against damage. As a final dressing for the cast, a stockinette 28 may be pulled over the tape 26. Manifestly, stockinette 28 may be easily removed and washed as required.

While the foregoing method has been described with particular reference to use of a cast in immobilizing a fractured bone, the economy and simplicity of a cast constructed according to the present invention makes it readily usable in the lumbar and abdominal regions for support purposes. After the cast has hardened, it may be cut into for examination of the injured area and 4 then replaced by wrapping tightly with tape.

Having thus described the invention, 1 claim;

1. A method of constructing a casting blank from which a plaster cast for a portion of the body may be formed, said method comprising: providing a first, outermost sheet of resilient, cellular water absorptive material; deposting at least one plaster splint on said sheet; providing a second outermost sheet of deformable water absorptive material; placing said second sheet in overlying relationship to the plaster on the first sheet; and joining the peripheral edges of said first and second sheets to encase said plaster therewithin.

2. A method as set forth in claim 1, wherein said depositing step comprises depositing a plurality of said plaster splints on said first sheet.

3. A casting blank for use in forming a plaster cast for a portion of the body, said blank comprising:

a first outermost sheet of resilient cellular, substantially non-extensible deformable, water absorptive material;

a layer of plastic material disposed on said first sheet;

and Y a second outermost sheet of deformable, water absorptive material disposed in overlying relationship to said plaster material to sandwich the latter between said first and second sheets,

said first and second sheets being joined together at their peripheral edges to enclose said plaster material therewithin.

4. The invention of claim 3, wherein said layer of plaster material comprises a plurality of plaster splints.

5. The invention of claim 4, wherein said first and second sheets are bonded together.

UTHTED STATES PATENT IERTIFICATE 9E CGRRECTION Rent No. 3,900,024 ated Auqgst 19. 1975 1 Leo E Lauber and Ernest A. Cowden It is certified that error appears in he above-identified patent ad that said Letters Patent are hereby corrected as shot-m belaw:

. Colg' l'lirie please delete "plastic" and substitute Signed and Scalcd this ninth Day Of December 1975 I '[SEAL] AlIeSl.

RUTH C. MASON C. MARSHALL DANN Arresting Officer Commissioner ofParenrs and Trademarks

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US797510 *Feb 16, 1903Aug 15, 1905Carl FuhrhansSurgical bandage.
US937478 *Oct 22, 1903Oct 19, 1909Samuel C SimsMaterial for surgical splints.
US1131295 *Dec 14, 1912Mar 9, 1915Maximin D TouartSurgical splint.
US2530986 *Aug 12, 1944Nov 21, 1950Quincy Moses EdmundPlaster of paris containing paper and method of making
US2692596 *Nov 14, 1951Oct 26, 1954Emile Marconnet Jean EdouardPlaster bandage
US2960984 *Dec 9, 1952Nov 22, 1960San Francisco Res CorpPrefabricated casts or mold and method for making the same
US3048169 *Oct 15, 1959Aug 7, 1962Dura Design Plastics LtdMethod of forming casts made with plastic foam material
US3135258 *Dec 8, 1961Jun 2, 1964Johnson & JohnsonBandage
US3197534 *Aug 22, 1961Jul 27, 1965Murray Alan EMethod of forming thin resilient shells
US3373741 *Mar 19, 1965Mar 19, 1968Army UsaPlastic splint
US3728206 *Nov 23, 1970Apr 17, 1973Johnson & JohnsonThermoplastic supportive structure
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4235228 *Jul 27, 1979Nov 25, 1980Medical Specialties, Inc.Orthopedic cast material
US4770299 *Jan 6, 1987Sep 13, 1988Parker Medical AssociatesRoll form medical bandaging product
US4869046 *Sep 12, 1988Sep 26, 1989Parker A BruceRoll form medical bandaging product and method of constructing same
US4888225 *Jun 3, 1988Dec 19, 1989Minnesota Mining And Manufacturing CompanyResin-impregnated foam materials and methods
US4946726 *Feb 18, 1987Aug 7, 1990Minnesota Mining And Manufacturing CompanyFoam sheet impregnated with water curable polyurethane
US5002047 *Sep 4, 1987Mar 26, 1991Minnesota Mining And Manufacturing CompanySupporting or cushioning body part with pad of open-celled foam impregnated with water curable polyurethane
US5176621 *Apr 29, 1991Jan 5, 1993M-Pact Worldwide Management CorporationCasting and splinting product having multiple plaster setting rates
US5195945 *Mar 25, 1991Mar 23, 1993Minnesota Mining And Manufacturing CompanyOrthotic pads and methods
US5203764 *Nov 27, 1991Apr 20, 1993Minnesota Mining And Manufacturing CompanyFoam pads useful in wound management
US5470306 *Feb 23, 1994Nov 28, 1995Kirschner Medical CorporationMedical bandaging article and packaging system
US5589131 *Mar 19, 1993Dec 31, 1996Nupipe, Inc.Method for manufacturing a replacement pipe for installation in an existing conduit
US5637077 *Oct 30, 1995Jun 10, 1997Smith & Nephew Casting, Inc.Custom-molded ankle brace
US5755678 *Oct 13, 1995May 26, 1998Parker; A. BruceCustom-fitted body protective device with variable reenforcement
US6042557 *Jun 10, 1998Mar 28, 2000K.R. Ferguson Technologies, Inc.Orthopedic splints and methods of making same
US6128777 *Jul 29, 1999Oct 10, 2000Parker Athletic Products, LlcCustom-fitted batter's forearm protector
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US6134720 *Jul 29, 1999Oct 24, 2000Parker Athletic Products, LlcShin guard with enhanced tibial protection
US6269485Jun 7, 2000Aug 7, 2001Parker Athletic Products, LlcCustom-fitted batter's lower leg protector
US6974431 *Apr 24, 2003Dec 13, 2005Medefficiency, Inc.Apparatus and method for applying a total contact cast
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US8287982 *May 14, 2007Oct 16, 2012Concrete Canvas LimitedImpregnated fabric
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WO1995022947A1 *Feb 21, 1995Aug 31, 1995Kirschner Medical CorpMedical bandaging article and packaging system
WO2009045220A1Oct 5, 2007Apr 9, 2009Bsn Medical IncMedical bandaging product
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WO2013090245A1Dec 11, 2012Jun 20, 2013Bsn Medical, Inc.Knitted substrate for use in medical bandaging product and bandaging product
Classifications
U.S. Classification602/8
International ClassificationA61F13/04
Cooperative ClassificationA61F13/04
European ClassificationA61F13/04