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Publication numberUS2858830 A
Publication typeGrant
Publication dateNov 4, 1958
Filing dateOct 1, 1956
Priority dateOct 1, 1956
Publication numberUS 2858830 A, US 2858830A, US-A-2858830, US2858830 A, US2858830A
InventorsJohn S Robins
Original AssigneeFrank C Lowe, John S Robins
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Surgical dressing
US 2858830 A
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Description  (OCR text may contain errors)

N034, 1958 r J. s, ROB-INS 2,858,830

SURGICAL DRESSING Filed 001:. 1, 1956 2 Sheets-Sheet 1 22 Fig. 7

INVENTOR.

John S. Robins ATTORNEY Nov. 4, 1958 J. s. ROBINS SURGICAL DRESSING Filed Oct. 1, 1956 2 Sheets-Shet 2 p 28 D 5 a d 22' T, T fl A I Fig. I2 35 2:

INVENTOR.

John S. Robins BY ATTORN'EY United States Patent G SURGICAL DRESSING John S. Robins, Denver, Colo., assignor to Frank C.

This invention relates to surgical dressing and more particularly to that class of surgical dressings which include a facing of absorbent compressible contacting material, a primary object of the invention being to provide a novel and improved surgical dressing having a facing of contacting material expansibly reactive to moisture and "characterized by enhanced efficiency and facility of use.

A further object of the invention is to provide a surgical dressing having a facing of contact material susceptible of imparting a light, but uniformly consistent pressure upon an area covered by the dressing without the necessity of extensive, tight bandages to hold the dressing facing in place against the selected area.

A further object of the invention is to provide a surgical dressing having a facing of contact material of high absorptive capacity and expansibility to bear against the irregular surfaces of a wound or like laceration to hold loose tissue portions in place and to fill gaps and pocks.

A further object of the invention is to provide a surgical dressing having a facing of contact material of high absorptive capacity and expansibility which is remarkably effective as a hemostatic compress and as a poultice to draw out the infectious fluids and serum of a boil or the like.

A further object of the invention is to provide a surgical dressing which may be used for pressure bandages and which will impart a selected, uniformly consistent, non-resilient pressure against a limb so bandaged regardless of the manner or efiiciency of the wrapping of the bandage.

, A further object of the invention is to provide a surgical dressing having a facing of contact material of remarkable softness and freedom from adhering to healing tissue when protecting and contacting such tissue.

, A further object of the invention is to provide a surgical dressing that is simple and inexpensive of production from readily available materials in any desired appropriate type, size or form, that is wholly non-irritating and comfortable in use, and that is advantageously positive and effective in attainment of the ends for which designed.

Yet other objects of the invention are to provide a novel and improved series and correlation of steps'constituting methods for the production of surgical dressings.

With the foregoing and other objects in view, my invention consists in the construction, arrangement, and

operative combination of elements, and in the nature washed to elimination of thepore-forming substance z a finger with the patch wrapped thereon, illustrating a typical use of the patch.

Figure 4 is a perspective underside view of the patch, similar to Fig. 2, but illustrating the expandible elements thereof as being fully expanded.

Figure 5 is a sectional detail somewhat diagrammatic in nature, as taken from they indicated line 5-5 atFig. 3 but on an enlarged scale and illustrating expandible elements thereof as being partially expanded reactive to the effect of moisture.

Figure 6 is a perspective view of another embodiment of my invention, wherein the concepts of the invention are applied to form a surgical wrapping strip.

Figure 7 is a fragmentary sectional detail as taken from the indicated line 7-7 at Fig. 6.

Figure 8 is a fragmentary sectional detail, similar to Fig. 7, but illustrating expandible elements thereof as being fully expanded. i

Figure 9 is a perspective view of an individuals leg with the strip being wrapped thereon, illustrating a typical use of the strip. I.

Figure 10 is a sectional detail, somewhat diagrammatic in nature, as taken from the indicated line 10-10 at Fig. 9, but on an enlarged scale and illustrating expandible elements thereof as being partially expanded reactive to the effect of moisture.

Figure 11 is a composite perspective view, diagrammatic in nature illustrating a series of sequential steps in the formation of a surgical patch such as the embodiment illustrated at Fig. 1 to 5.

Figure 12 is a diagrammatic sectional view depicting a continuous process for the formation of surgical dress.- ing such as the embodiment illustrated at Figs. 6 to 10.

Surgical dressings are prepared in many forms and for many different uses, and the basic elements that might be considered as constituting a surgical dressing include a pad or facing which may be applied to a wound or surface which is being dressed and a wrapping or cover which functions to hold the facing in position. Conventionally, the facing is usually a form of gauze or similar soft relatively absorbent material while the cover may be a simple cloth strip or, as in the case of surgical patches, an adhesive strip such as the commonly known surgical adhesive tape. In some instances, the cloth cover may even constitutethe facing where an extensive wrapping is necessary. Regardless of the type of dressing used, the common gauze facing has certain limitations of absorbability, tends'to stick to tissue and is difficult to apply with a uniformly consistent delicate pressure so often desirable intsurgical dressings. With such in 'view,"the present invention was conceived and developed in order to correct certaindeficiencies in conventional surgical dressings and to impart entirely new characteristics and capa bilitiesto surgical dressings distinguishedby advantageous facility and en; hanced effectiveness of use; and incidental thereto the invention conceives and contemplates improved and simplified methods for the production of such improved sur-v gical dressings, all. as more fully hereinafter. described in detail.

-It was discovered that artificial sponge materials .of regenerated cellulose type as conventionally produced and commonly available have properties of texture, porosf ity, resilience and absorptivity eminently suiting them for use as facing or contact material against fleshas in the facing of a dressing. Of somewhat diverse particue larity, artificial sponge materials appropriate ,for, the processing and uses hereinafter described result from the coagulation by means of heat and possible chemical ac-' tion of an initially plastic mass of viscose, fibres and a' soluble, pore-forming substance such as salt particles. Where a body of such sponge is formed, coagulated',

cut.

dried, the coagulated mass is an artificial sponge of moderate rigidity having a rather rough, scratchy surface texture and a high absorptive afiinity for moisture, which, when wet, is resiliently pliable and gently surface adher- When properly molded, the surface of the mass defined by the mold boundaries forms a smooth, though absorptive skin, which, when wet, has a delicately soft texture. Applying the known and peculiarly suitable properties of conventional cellulosic, artificial sponge materials to convenient and advantageous use in and for the production of surgical dressings and facing therefor, the product of the instant invention is developed from, and the method of the invention isapplied to, any such available material-having the characteristics and attribute above noted.

It has been established that conventional, cellulosic artificial sponge material yields promptly and readily to pressure with a consequent compaction and major reduction in bulk which becomes set and persist after the pressure is removed when the material is thoroughly dry, or dried, as through the application thereto, while under compression, of moderate heat effective to expedite dehydration thereof. Further, it has been determined that the material when compressed and set retains a high absorptive affinity for moisture which reacts through capil- 'lary penetration thereof to release the set and to restore the material to substantially its original bulk and to the resilient, pliable, surface soft condition characteristic of the original material when wet. Uniquely utilizing and correlating the attributes and potentialities of the artificial sponge materials above discussed, the present invention resides in a novel working of such material to form and condition practical and convenient use as surgical dressing and facing therefor and in the distinctive products so formed.

Referring more particularly to the drawing, Figs. 1 to 5 illustrate a common patch type surgical dressing constructed in accordance with the invention to provide for enhanced efiiciency of use. The patch consists of an elongate, rectangular cover strip 11 and a smaller facing pad 12 afiixed to the central portion of the underside thereof. The underside of the extended ends of the strip 11 are coated with a pressure sensitive adhesive of a type adapted to adhere to skin as is commonly used in such dressings and these ends form attaching flaps 13 for application of the patch to a body member. Such adhesive coating may extend across the entire underface of the strip 11 and serve as a binder to hold the facing pad in position. Since the strip 11 is of conventional material which may be tightly woven cloth or plastic film and the adhesive itself is substantially impermeable, the strip 11 is perforated above the pad 12 as by orifices 14 for ventilation and to facilitate wetting of the pad 12 as with antiseptics.

The facing pad 12 comprises a block of cellulosic, artificial sponge material which is preferably rectangular and is suitably proportioned in length and breadth to conform with the strip 11 and is of substantial thickness in its expanded natural state. Taking advantage, however, of the natural ability of the sponge to be compressively set, the pad 12 is carried upon the patch 10 as a flat dehydrated wafer having a thickness not substantially greater than the thickness of the cloth strip 11 since the compressed wafer may be in the order of one-twentieth of the original thickness of the sponge block. -In use, this pad will react with moisture to release the set and to expand to substantially its original bulk as hereinafter described in detail.

Figure 11 illustrates, diagrammatically, a convenient sequence of steps for the manufacture of a patch-type surgical dressing as illustrated at Figs. 1 to 5. To initiate'the operation, the strip 11.and sponge block 12' are prepared to size. Next, the strip 11 is prepared by coatwithadhesive and the orifices 14 are cuttherein. At the same time, the sponge block 12' is compressed, dehydrated and set to the form of a wafer 12. Finally, the wafer is afiixed in position upon the strip 11 and held thereto by the adhesive coating. It is to be understood that variations of such process are possible such as, for example, the operation may be continuous with the material forming the strips and sponge wafers being supplied as rolls which move together and are cut to size. Another variation is possible where the adhesive used on the strip 11 is of a thermal-curing type, the block 12' may be set in position and compressed and set to a wafer form at the same time the adhesive is being cured.

A typical use of this improved patch type surgical dressing as for a finger dressing is illustrated at Figs. 3 and 5. The patch 10 is wrapped about an individuals finger F with the facing pad 12 over a laceration L or cut or similar wound, with the attaching flaps 13 extending about the finger and overlying each other. Moisture which may exude from the wound and skin will act upon the facing pad 12 to commence an expansion with the-result of the bandage filling all gaps within the laceration holding skin flaps and flesh portions and the like gently in place and taking up any slack space that inevitably occurs when the bandage is applied as being wrapped about the individuals finger. Likewise, moisture may be applied externally to expand the pad. As a distinct improvement over the conventional type bandage which has to be wrapped tightly to snugly hold a facing against a wound, and which is uncomfortable because of such tightness, this improved bandage with such facing may be wrapped about an individuaPs finger or the like in a rather loose manner with the expansion of the facing pad assuring a snug fit.

The facing pad 12 may also be quickly expanded by the application of liquid medication as through the orifices 14 after the patch is in place, and the manner in which medication may be applied in conjunction with the pores of the artificial cellulosic sponge block beforeit is compressed into a wafer and it is within the contemplation of the invention to so prepare and incorporate medicaments into the sponge block 12' when it is being prepared for use and before it is compressed into a wafer. For example, iodine carried in polyvinylpyrrolidone has exceptional properties as a medicament, and the incorporation of such into the sponge block 12' follows the simple steps of saturating the block 12' with the medicament in liquid form, then dehydrating and compressing it into a wafer as hereinbefore described. In such incorporation, it was discovered that it would be desirable to effect substantial dehydration of the sponge material before the compressing step is effected and as such differs in the sequence of usual compression and dehydrationof cellulose sponge.

As a further refinement to the surgical patch above described, it is within the contemplation of the invention to select and use cellulosic sponge material of any selected porosity, and it is further contemplated that the porosity may vary in the sponge block 12', such as, for example, from a fine texture at the outer surface of the block 12' to a coarser texture within the body of the block. In the conventional formation of such cellulosic sponge material, the boundary walls of a block of sponge so formed are usually molded against smooth wall molds and such boundaries are of extremely fine porosity and smoothness which may best be described as a rudimentary skin. This skin is of a delicately gentle softness and smoothness when wetted that is gentle to the'tenderest tissue. Therefore, as a further modification of the in vention above described it is within the contemplation to provide s'ponge blocks 12' having a rudimentary skin outer contact surface.

'The surgical dressing illustrated at Figs. 6 through 10 is a roll type bandage 20 which is generally used for wrapping a body member F such as. a foot and leg as illustrated at Fig. 9. The roll type bandage is formed with a cloth backing web 21 and a facing 22 of compressed cellulosic, artificial sponge material in accordance with the principles of the invention. The web 21 is preferably a cotton or linen gauze-like material of a cellulose substance similar chemically to the facing 22, and the facing 22 may be aflixed to the web by glue or even aifixed thereto as an incident of the formation of the sponge material as hereinafter more fully described. When compressed, the facing 22 forms a thin, flat dehydrated skin on one side of the web which will expand when moistened from the state illustrated at Fig. 7 to that illustrated at Fig. 8 in the manner hereinbefore described. As such a product, the bandage 20 has several important uses as hereinafter set forth.

Wrapped about an individuals foot and leg F, or elsewhere, the bandage 20 performs several functions not previously known. When moistened, the sponge portion will expand and fill up any gaps between the bandage and the individuals leg and hold the leg with a moderate degree of snugness. As such, this construction replaces elastic bandages and wraps and supports the tissues of the member under a light uniform compression regardless of how tight the bandage itself was initially wrapped.

Modifications in the construction of this bandage 20 are possible by incorporating medications or by forming the same with a rudimentary skin as hereinbefore described. The thickness of the sponge facing 22 may be varied to correspond with the use desired. A comparatively thick facing may be best for deep wounds and lacerations while a thin facing may be suitable for gentle protection of burned skin surfaces and it is obvious that the many inherent applications for this type of bandage will be quickly realized.

Figure 12 illustrates, diagrammatically, a preferred sequence for the manufacture of a roll type bandage 20 from raw materials from which the sponge itself is originated. A vat 25 contains a charge 26 of uncured plastic viscose and fibres containing soluble pore forming substances in a homogenous mixture. This charge is forced under pressure as by piston 27 through a suitably rectangular orifice 28 to provide for an extruded flow of sponge material. A reel of cloth 29 provides a continuous web 21 which moves toward the underside of the extruded flow of sponge material, forcibly contacting and blending into the same by movement around a roller 30.

This prepared mass then moves through a curing oven 31 and the viscose is set to the fibres within it and also to the cloth material forming web 21. Next, the cured mass passes over suitable rollers 32 and into a leeching vat 33 where the pore forming substances are dissolved out leaving only the sponge mass 22 and the web 21. It is to be understood that a series of such vats may be used to fully effectuate this leeching operation if such is desired and necessary.

Finally, the prepared sponge 22 afiixed to Web 21 is moved over suitable rollers 34, through wringers 35 and finally through heated irons and compressors 36 which compress, dehydrate and heat set the sponge material into the thin facing 22 hereinbefore described.

Alternate steps to this process may be easily devised where it is desired to apply medicaments to the sponge material, such as, for example, the medicament may be applied as a liquid form to saturate the sponge after it has moved through the wringers 35 and the sponge may then partially be dehydrated without being compressed to thicken the solution of medicament within the sponge, followed by complete dehydration upon the compression operation.

While I have described and illustrated the invention in considerable detail, it is obvious that its varied'use's .and many applications render it possible for others to construct, devise and arrange alternate and equivalent constuctions, methods and steps which are within the spirit and scope of the invention; hence I desire that my protection be limited only by the proper scope of the appended claims.

I claim: 7

1. A surgical dressing substantially as set forth comprising a cover strip and a compressed facing pad formed as a wafer of compressed cellulosic, artificial sponge material expansively reactive to moisture and adhesive means attaching the facing pad to the cover strip.

2. A surgical dressing comprising a cover strip and a compressed facing pad secured thereto, said pad being of absorptive, compressible sponge-like material characterized by the property of retaining a compressive set when dehydrated and being expansively reactive to moisture to a porous sponge-like structure.

3. A surgical dressing comprising a cloth, web-like cover strip, a .compressed facing of cellulosic artificiab sponge material expansively reactive to moisture and adhesive means attaching the facing to the strip.

4. A surgical dressing comprising a Web-like cover strip and a facing at one side thereof of compressed sheet of cellulosic, artificial sponge material expansively reactive to moisture integrally associated therewith.

5. A surgical dressing comprising a web-like cover strip of cellulosic like fibres and a compressed facing skin of cellulosic artificial sponge material of a type which may be compressed to a thin sheet and being expansively reactive to moisture, afiixed to cover strip.

6. A surgical patch substantially as set forth, comprising an adhesive coated cover strip and a compressed facing pad formed as a wafer of cellulosic artificial sponge material expansively reactive to moisture.

7. In a surgical patch formed as a cover strip carrying a compressed facing skin of cellulosic artificial sponge material adhesively secured thereto and being expansively reactive to moisture wherein said facing skin is impregnated with medicament.

8. A surgical dressing comprising a web-like cover strip and a sheet of compressed dry facing pad of cellulose artificial sponge material expansively reactive to moisture aflixed to the cover strip.

9. The dressing defined in claim 8, wherein said facing pad includes a face having, when said pad is expanded, a smooth surface of considerably finer texture than the body of the pad.

10. The dressing defined in claim 8 wherein said facing pad includes dry medicaments within the body of the pad.

11. In a process for preparing a medicated surgical dressing formed as a cover strip carrying a compressed facing skin of cellulosic artificial sponge material expansively reactive to moisture, including the steps of saturating the sponge facing skin when expanded with a medicant in liquid form, substantially dehydrating the medicamentin the facing skin to substantially solid state and compressing the substantially dehydrated cover strip and dehydrating the same to a set condition.

12. A process for preparing a surgical dressing including a cover strip and a facing of cellulosic artificial sponge of the type which is formed by coagulating a mixture of uncoagulated plastic, fibre and soluble pore forming substances and then dissolving out the pore forming substance, and including the steps of extruding said matrix to the shape of the facing, laying the extrusion against the cover strip, coagulating said matrix, dissolving said pore forming substances, and dehydrating compressing and setting the resulting cellulosic sponge material as a flat sheet against the cover strip.

13. The process defined in claim 12 including the steps of drying out the dressing, prior to compressing and setting, saturating the sponge with a medicament, and dehydrating the same in conjunction With' said compressive step. I v j '14. The dressing defined in claim 2 wherein said fading pad is characterized by having a variable sponge-like pore texture, with the pore texture at the surface of the pad being considerably finer than the pore texture Within the bodyof the pad.

1,074,245 Casevitz Sept. 30, 1913 3 a Eustis Oct. 18, 1-938 Overton et al Feb. 6, 1951 'Hammon Nov. 24, 1953 Hollingsworth Jan. 17, 1956 FOREIGN PATENTS Great Britain Dec. 13, 1937 OTHER REFERENCES Payne: The Use of Cellulose Sponge in Surgery,

Surgery, pp. 803-809.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1074245 *Jun 25, 1913Sep 30, 1913Henry CasevitzHygienic textile sponge.
US2133609 *Jul 20, 1934Oct 18, 1938Kendall & CoSurgical dressing
US2540906 *Jun 5, 1947Feb 6, 1951Burgess Cellulose CompanyArtificial chamois skin and method of making the same
US2659935 *Mar 18, 1950Nov 24, 1953Christopher L WilsonMethod of making compressed sponges
US2731014 *Jun 29, 1954Jan 17, 1956Hollingsworth Irene MSanitary appliance
GB476595A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3053252 *Feb 10, 1958Sep 11, 1962Lohmann KgEmbossed bandaging material
US3062210 *Aug 21, 1958Nov 6, 1962William M SchollMedicated pad or bandage and method of making the same
US3062212 *Aug 8, 1960Nov 6, 1962Harvey KravitzVaccinating devices
US3113568 *Dec 26, 1961Dec 10, 1963Eric K ErskineStyptic bandage
US3157178 *Dec 14, 1961Nov 17, 1964Oneida LtdDressing
US3171410 *Aug 29, 1962Mar 2, 1965Jr Herbert J TowlePneumatic wound dressing
US3172808 *Mar 9, 1965Cfaemische Faforik FraaMethod of treating wounds
US3422570 *Oct 21, 1966Jan 21, 1969Borst Gijsbertus HendricusMethod for preventing the splitting of the calyx of flowers e.g. of carnations
US3431907 *Feb 24, 1966Mar 11, 1969Gustave GirardiereAdhesive strips for dressings or therapeutic treatments
US3434472 *Apr 5, 1966Mar 25, 1969Smith & NephewSurgical dressings
US3800792 *Apr 17, 1972Apr 2, 1974Johnson & JohnsonLaminated collagen film dressing
US3929131 *Jan 9, 1975Dec 30, 1975Thomas L HardwickBandage and method of using same
US4005709 *Apr 2, 1976Feb 1, 1977Laerdal A SCompression bandage
US4180073 *Aug 29, 1977Dec 25, 1979Alza CorporationDevice for delivering drug to biological environment
US4182335 *Jul 27, 1977Jan 8, 1980Matrullo C JamesAnal filter
US4203442 *Jan 4, 1979May 20, 1980Alza CorporationDevice for delivering drug to a fluid environment
US4377159 *Jun 29, 1981Mar 22, 1983Minnesota Mining And Manufacturing CompanyPressure bandages and methods for making the same
US4595391 *Jan 10, 1984Jun 17, 1986George AbplanalpOintment applicator
US4619654 *Jan 4, 1985Oct 28, 1986George AbplanalpOintment applicator
US4826479 *Jul 9, 1987May 2, 1989Burgin Kermit HPillow construction and medication dispenser
US4880417 *Oct 16, 1987Nov 14, 1989Biological Resistance, Inc.Deodorizing and sound muffling anal pad
US4885855 *Apr 8, 1985Dec 12, 1989Fearing Manufacturing Co., Inc.Antibacterial attachment
US4969869 *Jan 11, 1989Nov 13, 1990Burgin Kermit HPillow construction and medication dispenser
US4971046 *Feb 22, 1989Nov 20, 1990Hazeltine Lake & CompanySurgical pressure plaster
US5025783 *Feb 25, 1988Jun 25, 1991Sparta Surgical Corp.Method of applying a medical dressing device
US5060662 *Jul 6, 1990Oct 29, 1991Farnswoth Iii Kenneth FOpen air bandage
US5429589 *Apr 2, 1992Jul 4, 1995New Dimensions In Medicine, Inc.Hydrogel gauze wound dressing
US5507721 *Mar 18, 1994Apr 16, 1996Shippert; Ronald D.Medical apparatus and method for applying pressure and absorbing fluid
US5540964 *Sep 14, 1994Jul 30, 1996Intera Technologies, Inc.Moisture transport cast lining material for use beneath an orthopedic cast, being in the form of a fabric and consisting essentially of synthetic hydrophobic fibers or a blend of synthetic hydrophobic fibers and a second different fiber
US5571079 *Dec 30, 1994Nov 5, 1996Algos Pharmaceutical CorporationWound dressing
US5716621 *Jul 3, 1996Feb 10, 1998Pharmadyn, Inc.Nonocclusive drug delivery device and process for its manufacture
US5762620 *Sep 23, 1994Jun 9, 1998Ndm Acquisition Corp.Wound dressing containing a partially dehydrated hydrogel
US5823983 *Dec 5, 1995Oct 20, 1998Rosofsky; Paul M.Bandages comprising compressed cellulose
US5899871 *May 31, 1995May 4, 1999Ndm, Inc.Wound packing
US5921948 *Nov 22, 1996Jul 13, 1999Nitto Denko CorporationSurgical dressing
US6981955 *Jun 28, 2004Jan 3, 2006Invista North America S.A.R.L.Sleeve-like knitted structure for use as a castliner
US7482503 *Jun 14, 2002Jan 27, 2009Providence Health System-OregonWound dressing and method for controlling severe, life-threatening bleeding
US8269058Jul 16, 2008Sep 18, 2012Hemcon Medical Technologies, Inc.Absorbable tissue dressing assemblies, systems, and methods formed from hydrophilic polymer sponge structures such as chitosan
US8313474Dec 17, 2007Nov 20, 2012Hemcon Medical Technologies, Inc.Method for preparing a compressed wound dressing
US8646456 *Sep 30, 2008Feb 11, 2014Gilles TouatiAntibacterial agent, and device used for active protection of incision margins and incorporating such an antibacterial agent
US20110197897 *Sep 30, 2008Aug 18, 2011Gilles TouatiAntibacterial agent, and device used for active protection of incision margins and incorporating such an antibacterial agent
WO1997017044A1 *Nov 1, 1996May 15, 1997John William AshMembrane for skin removed wound
Classifications
U.S. Classification604/307, 604/293, D24/189, 602/75, 604/308, 602/46
International ClassificationA61F13/02, A61F13/15, A61F13/00
Cooperative ClassificationA61F13/0273, A61F13/0276, A61F13/0203, A61F2013/530802, A61F13/06, A61F13/105, A61F2013/00561, A61F2013/00102, A61F2013/00646, A61F2013/51447
European ClassificationA61F13/02M, A61F13/00, A61F13/02B