EP1855627A2 - Produit de bandage medical synthetique possedant une caracteristique de durcissement a sec et procede d'application de la bande de platre pour former le platre - Google Patents

Produit de bandage medical synthetique possedant une caracteristique de durcissement a sec et procede d'application de la bande de platre pour former le platre

Info

Publication number
EP1855627A2
EP1855627A2 EP06719185A EP06719185A EP1855627A2 EP 1855627 A2 EP1855627 A2 EP 1855627A2 EP 06719185 A EP06719185 A EP 06719185A EP 06719185 A EP06719185 A EP 06719185A EP 1855627 A2 EP1855627 A2 EP 1855627A2
Authority
EP
European Patent Office
Prior art keywords
medical bandage
activator
resin
resin system
application
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06719185A
Other languages
German (de)
English (en)
Inventor
John Evans
Shitij Chabba
Martin O'hara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSN Medical Inc
Original Assignee
BSN Medical Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSN Medical Inc filed Critical BSN Medical Inc
Publication of EP1855627A2 publication Critical patent/EP1855627A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/07—Stiffening bandages
    • A61L15/14—Use of materials characterised by their function or physical properties
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/04—Plaster of Paris bandages; Other stiffening bandages
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/07—Stiffening bandages
    • A61L15/12—Stiffening bandages containing macromolecular materials

Definitions

  • This invention relates to a medical bandage casting system comprising a latent resin/polymer impregnated substrate that can be activated/cured using a suitable activator.
  • the casting system includes a cast tape intended to be placed around an injured limb, over a padding, and hardened in place to form a rigid, orthopedically-effective structure.
  • the invention also relates to a method of applying a cast tape to form a cast.
  • the polyurethane resin activates and hardens over a period of time due to the presence of moisture in the atmosphere.
  • the speed of activation and hardening of the cast tape depends on the amount of moisture available for the tape. If the cast tape is saturated with water, the activation will be faster.
  • the invention described here provides a resin chemistry that offers a solution to the problems associated with water activation.
  • a latent resin system for a medical bandage comprising resin for being coated onto or impregnated into a medical bandage, the resin remaining soft and comformable during exposure to ambient moisture.
  • An activator is provided for reacting with the resin for initiating hardening of the resin and thereby the medical bandage.
  • the resin system comprises a polyurethane system and the activator comprises a compound containing active hydrogen sites for curing the polyurethane.
  • the resin system comprises an isocyanate-containing monomer/polymer/prepolymer
  • the activator is selected from the group consisting of water, polyol, primary aliphatic amine, secondary aliphatic amine, carboxylic acid, primary aromatic amine, urethane and urea.
  • the prepolymer comprises a blend of cycloaliphatic diisocyanate (IPDI), polycaprolactone and polycarbonate diol.
  • the resin system comprises an epoxy system and an activator containing active hydrogen sites for curing the epoxy.
  • the epoxy system includes epoxide groups for reacting the the active hydrogen sites of the activator.
  • the activator comprises a compound selected from the group consisting of aliphatic amine, aromatic amine and acid anhydride.
  • the activator comprises a viscous liquid for being applied to the medical bandage after application to an injured limb to thereby activate and harden the resin system.
  • a medical bandage product comprises a medical bandage and a latent resin system coated onto or impregnated into the medical bandage.
  • a resin activator is provided and is maintained apart from the medical bandage until after the medical bandage has been applied to an injury site.
  • the resin activator comprises a compound for reacting with the resin for initiating hardening of the resin and thereby the medical bandage.
  • the medical bandage product includes a package within which the medical bandage is packaged until ready for use in a package that is not impervious to ambient moisture.
  • the resin system comprises a polyurethane system and the activator comprises a compound containing active hydrogen sites for curing the polyurethane.
  • the resin system comprises an isocyanate-containing monomer/polymer/prepolymer
  • the activator is selected from the group consisting of water, polyol, primary aliphatic amine, secondary aliphatic amine, carboxylicacid, primary aromatic amine, urethane and urea.
  • the prepolymer comprises a blend of cycloaliphatic diisocyanate (IPDI), polycaprolactone and polycarbonate diol.
  • the resin system comprises an epoxy system and an activator containing active hydrogen sites for curing the epoxy.
  • the epoxy system includes epoxide groups for reacting the the active hydrogen sites of the activator.
  • the activator comprises a compound selected from the group consisting of aliphatic amine, aromatic amine and acid anhydride.
  • the activator comprises a viscous liquid for being applied to the medical bandage after application to an injured limb to thereby activate and harden the resin system.
  • the medical bandage comprises a cast tape.
  • a method according to the invention comprises the steps of providing a medical bandage, coating or impregnating the medical bandage with a resin system that remains soft and comformable during exposure to ambient moisture.
  • the medical bandage is applied to an injury site.
  • a resin activator is provided and is maintained separate from the medical bandage until after application of the medical bandage to the injury site.
  • the resin activator is applied to the medical bandage after application of the medical bandage to the injury site to thereby harden the medical bandage into a rigid cast.
  • the method includes the step of packaging the medical bandage in a package until use that is not impervious to ambient moisture.
  • Figure 1 is a medical bandaging product that includes a cast tape according to an embodiment of the invention
  • Figure 2 shows the cast tape when removed from its protective pouch
  • Figure 3 illustrates application of the cast tape to the lower leg to form a cast when hardened
  • Figure 4 illustrated dispensing of the activator preliminary to application to the cast tape to initiate hardening
  • Figure 5 shows application of the activator to the cast
  • Figure 6 shows the completed cast
  • Figure 7 shows a completed forearm cast formed using the cast tape according to an embodiment of the invention. Description of the Preferred Embodiment and Best Mode
  • the medical bandaging product comprises an outer pouch 11 in which is contained a roll of cast tape 12.
  • cast tape 12 need not be sealed in a moisture impervious package, but merely in a package of a type sufficient to keep the cast tape clean, relatively dry and in its proper shape.
  • the cast tape 12 comprises an elongate textile substrate that can be any suitable knitted, woven or a non-woven fabric constructed using any organic or inorganic yarns or a blend of the same.
  • the textile substrate is a warp knitted fabric constructed using polyester and polypropylene yarns.
  • the tape 12 may be wound onto a tube 13 for shipment and storage until use.
  • Use of the cast tape 12 according to a preferred method according to the invention is carried out by removing the cast tape 12 in roll form from the pouch 11 and applying the cast tape 12 to an injured limb in a conventional manner after placement of a suitable underpadding 14 on the limb.
  • the cast tape 12 remains in a soft, flexible state until the cast technician is satisfied that the cast has been properly applied and adjusted, and is ready to be transformed into its hardened state.
  • the chemical system comprises a resin and an activator, and is preferably either a polyurethane system or an epoxy system.
  • the polyurethane system is based on the reaction of an isocyanate containing monorner/polymer/prepolymer with a suitable compound containing active hydrogen.
  • Compounds containing active hydrogen sites that can be used for curing the isocyanate include water, polyol (primary, secondary and tertiary hydroxyl groups), primary and secondary aliphatic amines, amides, carboxylic acids, primary aromatic amines, urethanes and urea.
  • Epoxy-based resin systems are similar to polyurethanes in that the epoxide group reacts with an active hydrogen containing compound.
  • the preferred active hydrogen containing compound is an aliphatic or aromatic amine and/or acid anhydride.
  • a preferred resin chemistry comprises a polyurethane-based resin system.
  • the prepolymer is a blend of a cycloaliphatic diisocyanate (IPDI), polycaprolactone and polycarbonate diols.
  • IPDI cycloaliphatic diisocyanate
  • the prepolymer is applied onto the textile substrate forming the cast tape
  • the prepolymer loading level varies depending on the weight, density, thickness and materials from which the textile substrate is fabricated.
  • the prepolymer- impregnated textile will remain latent and thus in its flexible form after opening the package and can be easily applied on the patient's limb without the resin hardening.
  • the activator is applied onto the surface of the cast tape 12 to harden the cast in position.
  • the activator is preferably a secondary diamine such as Clearlink 1000 by Dorf Ketal Chemicals LLC, Texas, USA.
  • the activator may preferably be in the form of a viscous, creamy liquid 21 and may suitably be stored in a dispenser 20, such as a soap dispenser, conveniently located for ready access by the cast technician.
  • a dispenser 20 such as a soap dispenser
  • Other containers may be used, such as small single-use pouches or envelopes, tubes or squeeze bottles.
  • the activator liquid is formulated to be essentially dripless and with sufficient lubricity and spread rate to readily and evenly coat the cast tape 12 with a light, rubbing pressure applied by the cast technician.
  • protective gloves are worn to prevent contact between the hands and the chemicals in the resin and the activator, as shown in Figures 4 and 5.
  • the cast technician applies the activator evenly onto the outer surface of the cast tape 12, already properly in place on the limb.
  • Contact between the activator and the resin initiates the above-described reaction that quickly hardens the cast tape 12, forming a rigid cast, as shown in Figure 6.
  • the hardening is irreversible, i.e., the cast formed from the rigid cast tape 12 will not soften if wetted or heated.
  • the cast may be removed in the usual manner when healing is complete by use of a standard cast removal saw.
  • the waterless cast system can also be produced using activator components encapsulated in microspheres or microcapsules.
  • the microcapsules known in fields such as printing ink containment, contain the activator, or both the activator and the catalyst.
  • the cast tape is coated with a latent polymer system that remains stable and does not activate on exposure to ambient conditions, as described above.
  • the microcapsules are embedded either in the resin system or coated onto the surface of the substrate. In the preferred form, the microcapsules are embedded in the latent resin system itself.
  • the clinician applies the cast tape around the fractured limb as described above. To activate the cast system, the clinician rubs or gently presses around the cast during application, as is the case with application of ordinary casts.
  • the microencapsulation technique offers advantages, including improved lamination between layers and eliminates the requirement for a separate activator component delivery system. Since the microcapsules are present in the resin system itself, the activator is available between every layer and provides uniform setting time and rigidity level across several layers of the cast. The microcapsule construction is selected with desired material and wall thickness to control the pressure required to rupture the microcapsules, and prevent any premature rupture of microcapsules during the cast tape application.
  • the lower leg cast shown in the preceding drawings are merely illustrative of the many types of casts that can be formed using the cast tape 12. In general, any cast that can be formed using a prior art plaster or synthetic, moisture-curable cast tape can be formed using the cast tape 12 according to the invention described above. See, for example, the forearm cast as shown in Figure 7.
  • resin and polymer are used interchangeably in this application to describe the material applied to the cast tape 12 before being sealed into the pouch 11.
  • laminate resin system refers to a resin system that will not activate or cure upon exposure to air, moisture or ambient environment, but will only activate once the curing agent is brought in contact with the activator part of the resin system.

Landscapes

  • Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Materials For Medical Uses (AREA)
  • Medicinal Preparation (AREA)

Abstract

L'invention concerne un système de résine latente enrobant ou imprégnant un bandage médical, la résine restant molle et malléable pendant l'exposition à l'humidité ambiante. Un activateur permet d'activer la réaction avec la résine à des fins de durcissement de la résine et du bandage médical. Le procédé consiste à fournir un bandage médical et à enrober ou imprégner le bandage médical d'un système de résine qui reste souple et malléable pendant l'exposition à l'humidité ambiante. Un activateur de résine est fourni et conservé séparément du bandage médical jusqu'à ce que le bandage médical ait été appliqué à l'emplacement de la lésion. L'activateur de résine est appliqués sur le bandage médical après application du bandage médical sur l'emplacement de la lésion de manière à durcir le bandage médical pour former un plâtre rigide, ou des microcapsules à l'intérieur desquelles l'activateur et/ou la résine sont contenues sont rompues pour durcir le bandage médical et former un plâtre rigide.
EP06719185A 2005-01-25 2006-01-23 Produit de bandage medical synthetique possedant une caracteristique de durcissement a sec et procede d'application de la bande de platre pour former le platre Withdrawn EP1855627A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64694505P 2005-01-25 2005-01-25
PCT/US2006/002234 WO2006081164A2 (fr) 2005-01-25 2006-01-23 Produit de bandage medical synthetique possedant une caracteristique de durcissement a sec et procede d'application de la bande de platre pour former le platre

Publications (1)

Publication Number Publication Date
EP1855627A2 true EP1855627A2 (fr) 2007-11-21

Family

ID=36740972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06719185A Withdrawn EP1855627A2 (fr) 2005-01-25 2006-01-23 Produit de bandage medical synthetique possedant une caracteristique de durcissement a sec et procede d'application de la bande de platre pour former le platre

Country Status (6)

Country Link
EP (1) EP1855627A2 (fr)
JP (1) JP2008528118A (fr)
AU (1) AU2006209185B2 (fr)
CA (1) CA2595806A1 (fr)
MX (1) MX2007008937A (fr)
WO (1) WO2006081164A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010005031A (ja) * 2008-06-25 2010-01-14 Nagase Chemtex Corp 固定用包帯
CN102772278A (zh) * 2012-07-10 2012-11-14 东华大学 一种可自然降解的矫形绷带及制备方法
JP2016530909A (ja) * 2013-06-28 2016-10-06 ビーエスエヌ メディカル，インク． 被包性硬化型媒質が封入された整形外科用ギブスおよび副木の包帯と方法
KR101414493B1 (ko) * 2013-09-24 2014-07-14 주식회사 우리소재 변형성과 강성이 우수한 열가소성 캐스트 및 그 제조방법

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996934A (en) * 1971-08-09 1976-12-14 Alza Corporation Medical bandage
US5118779A (en) * 1989-10-10 1992-06-02 Polymedica Industries, Inc. Hydrophilic polyurethane elastomers
GB9303200D0 (en) * 1993-02-17 1993-03-31 Smith & Nephew Orthopaedic casting bandage
US5807292A (en) * 1996-06-24 1998-09-15 Minnesota Mining And Manufacturing Company Orthopedic casting article having soft and hard regions
US5944674A (en) * 1997-11-03 1999-08-31 Johnson & Johnson Professional, Inc. Controlled tack polyurethane casting tape

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006081164A3 *

Also Published As

Publication number Publication date
WO2006081164A3 (fr) 2007-03-29
WO2006081164A2 (fr) 2006-08-03
JP2008528118A (ja) 2008-07-31
AU2006209185A1 (en) 2006-08-03
MX2007008937A (es) 2007-10-10
AU2006209185B2 (en) 2008-08-21
CA2595806A1 (fr) 2006-08-03

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