Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3483494 A
Publication typeGrant
Publication dateDec 9, 1969
Filing dateSep 3, 1965
Priority dateSep 3, 1965
Publication numberUS 3483494 A, US 3483494A, US-A-3483494, US3483494 A, US3483494A
InventorsHarry W Cromie
Original AssigneeSurgitool Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Magnetic surgical drape
US 3483494 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Dec. 9, 1969 H. w. cRoMlE MAGNETIC SURGICAL DRAPE med sept. s, 1965 @Huw DMW: @tmb wlmi@ AW@ AHUMWAW@ mln@ n@ @MMU @MIU nml@ mlm@ mhmlu@ INVENTOR.

lnited States Patent O M' Il Claim ABSTRACT F THE DISCLSURE A surgical drape to be laid upon a patient during surgery is formed from a exible sheet having magnets embedded in it and forming protrusions on the opposite sides of the sheet. Surgical instruments laid upon the protrusions are held in place by the magnets beneath.

During operations a surgeon may pick up his instruments from a nearby table as he needs them or they may be handed to him by a nurse or assistant. As the surgeon changes from one instrument to another in some types of operations, he often lays the instruments on the patient himself, who thus serves as an instrument table. The

trouble with this procedure is that the instruments may roll or slide off the patient and onto the floor.

It is an object of this invention to provide a special drape that can be laid upon a surgical patient for supporting and firmly retaining any surgical instruments that are laid on the drape. Another object is to provide such a drape which can be sterilized without damage and which has a long lite.

The preferred embodiment of the invention is illustrated in the accompanying drawings, in which FIG. l is a plan view of my surgical drape;

FIG. 2 is an end view thereof; and

FIG. 3 is an enlarged fragmentary longitudinal section taken on the line III- III of FIG. 1.

Referring to the drawings, the main body of the drape is formed from a flexible sheet 1 of impervious material that can be sterilized without damage to it, such as synthetic rubber or a suitable plastic. Preferably, the sheet is rectangular and it may be any desired size, but a sheet measuring about 18 by 24 inches is a convenient size because it is large enough for its purpose and yet not so large as to be bothersome. Embedded in this sheet is a plurality of closely spaced permanent magnets. Most suitably, these magnets are bar magnets 2 arranged in parallel rows with the magnets in each row substantially parallel to one another. It also is desirable that the magnets in each row be staggered relative to those in the adjoining rows.

To embed the magnets in the sheet, the sheet may be formed from two thin layers sealed together with the magnets between them. In forming the drape, the magnets are laid on one layer of the sheet and then the other layer is placed over them and the two layers aer pressed very tightly together. They may be joined by an adhesive or by fusion under heat. The entire area of the two layers, except the portions overlying the magnets, are joined together face to face in this way, with the result that the Patented Dec. 9, 1969 magnets are sealed in the sheet in fixed positions and cause the portions of the sheet engaging them to project from opposite sides of the sheet.

One way of making this drape is to place one layer of the sheet on a flat die provided with recesses slightly larger than the magnets. The bottoms 0f the recesses are connected with means for drawing the air out of them so `that the portions of the flexible material overlying the recesses will be drawn down into them. The magnets then are laid on the material in the recesses, above which the magnets extend for about half their thickness, and the other layer of sheet material is laid over them. A top die, recessed like the bottom one, then is forced down to press the two layers tightly together around the magnets to form the exible sheet with the magnets embedded in it. An adhesive between the layers may join them together, or the dies may be heated to fuse the layers when certain materials are used. The sheet tightly engages the magnets to hold them in place and seals them from the atmosphere so that they cannot rust.

The magnets are arranged closely enough together to assure at least one magnet attracting and holding a surgical instrument laid on the drape, no matter in what position the instrument may be placed. The instruments 3, 4, S can be placed, or even dropped carelessly, on this drape and yet they will not fall olf because the magnets hold them securely. The instruments cannot possibly slide off` the drape. This drape can be laid over any portion of the patient and will stay in place, because the protrusions from the body of the sheet form a non-skid surface, and the weight of the magnets causes the sheet to conform to the underlying contours of the surface supporting the drape. After use, the drape can be washed and sterilized and rolled into a small roll for storage.

I claim:

1. A surgical drape adapted to be laid upon a patient undergoing surgery, comprising an exposed flexible sheet formed of two superimposed layers of impervious synthetic plastic material, and a plurality of rows of spaced bar magnets between said layers, said layers completely covering all of the magnets and being sealed together throughout their areas except where spaced apart by the magnets, and said layers tightly engaging and conforming to the contours of the magnets between them to provide portions of the layers that project from the opposite sides of the remainder of the sheet between the magnets for engagement by metal surgical instruments to be held thereon by the sealed-in magnets.

References Cited UNITED STATES PATENTS 2,597,601 5/1952 Sherman 335-303 X 361,248 4/1887 Winton 335-285 237,939 2/1881 Wilson 12S-1.3

ROBERT F. BURNETT, Primary Examiner M. A. LITMAN, Assistant Examiner U.S. Cl. XR. 12S-1.3; ll-120

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US237939 *Sep 22, 1880Feb 15, 1881 William wilson
US361248 *Oct 28, 1885Apr 12, 1887 Holder for metal articles
US2597601 *Aug 23, 1948May 20, 1952Harry W BaconFisherman's hatband
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3546643 *Jan 16, 1969Dec 8, 1970Virostek Catherine APad for surgical instruments or the like
US3727658 *Sep 22, 1971Apr 17, 1973Instranetics IncReceiver for surgical implements
US3861521 *Apr 17, 1973Jan 21, 1975Mildred V BurtzDisposable suture organizer
US3944069 *Jan 8, 1974Mar 16, 1976Eldridge Jr John DReceiver for disposable surgical implements
US4183439 *Mar 3, 1978Jan 15, 1980Bell William WUtensil and tool holder
US4367728 *Sep 5, 1980Jan 11, 1983Mutke Hans GIsolation apparatus
US4489711 *Mar 1, 1982Dec 25, 1984Energy-Pak, Ltd.Magnetic plaster
US4539757 *Nov 30, 1983Sep 10, 1985Shyu Shiang CDrawing implement
US4637513 *Oct 20, 1980Jan 20, 1987Instranetics, Inc.Disposable surgical implement collector
US4749218 *Jun 15, 1987Jun 7, 1988Jordan Richard LMagnetic safety chain holder
US4944311 *Mar 9, 1988Jul 31, 1990Jodel Medical Products, Inc.Surgical instrument retainer
US5005590 *Feb 17, 1989Apr 9, 1991Jodel Medical Products, Inc.Surgical instrument tray
US5036866 *Feb 2, 1990Aug 6, 1991Devon Industries, Inc.Surgical instrument retainer
US5145063 *Oct 7, 1991Sep 8, 1992The United States Of America As Represented By The Administrator Of The National Aeronautics And Space AdministrationSharps container
US5195538 *Feb 27, 1991Mar 23, 1993Devon Industries, Inc.Surgical instrument tray
US5389061 *May 27, 1993Feb 14, 1995Nor; FabioFor aiding in the treatment of chronic conditions of an animal
US5443493 *Dec 29, 1992Aug 22, 1995Alfred E. Mann Foundation For Scientific ResearchCochlea stimulating electrode assembly, insertion tool, holder and method of implantation
US5538495 *Dec 15, 1995Jul 23, 1996Nu-Magnetics Inc.Flexible magnetic pad with multi-directional constantly alternating polarity zones
US5848693 *Nov 4, 1997Dec 15, 1998Davis; Steven J.Laparoscopic surgical tray with apertured clips
US6073766 *Apr 4, 1997Jun 13, 2000Winnard; Stanley D.Magnetic tool organizers, and tool box with magnetic organizers
US6178571Nov 29, 1999Jan 30, 2001Aqua Bath, Inc.Barrier-free shower system
US6939287Sep 30, 2003Sep 6, 2005Nu-Magnetics, Inc.Magnetotherapeutic device with bio-ceramic fibers
US7187261 *Oct 11, 2002Mar 6, 2007Cassar Victor EMagnetic strip
US7735645 *Apr 26, 2005Jun 15, 2010Mag Clip CorporationMagnetic tool organizing system and method of manufacturing a magnetic tool organizing system
US7744051Apr 26, 2005Jun 29, 2010Mag Clip CorporationMagnetic attachment element
US8499943 *Apr 20, 2009Aug 6, 2013Jaqueline P. NeldnerDecorative magnetic tool holding apparatus and method of holding scissors
EP0026014A1 *Sep 11, 1980Apr 1, 1981Philips Electronics N.V.Method of manufacturing a permanent magnet assembly which is to be arranged in an air gap of a transformer core
EP0043839A1 *Jan 19, 1981Jan 20, 1982American Hospital Supply CorpSurgical drape system.
EP0043840A1 *Jan 19, 1981Jan 20, 1982American Hospital Supply CorporationMethod of draping a surgical patient
EP1502266A1 *Oct 11, 2002Feb 2, 2005Victor Emmanuel CassarA magnetic strip
WO2000048526A1 *Feb 18, 2000Aug 24, 2000Hall Richard MalcolmMat for retaining surgical instruments
U.S. Classification128/852, 206/818, 428/164, 428/900
International ClassificationA61B19/10, A61B19/02, H01F7/02
Cooperative ClassificationY10S206/818, A61B19/10, A61B19/0256, Y10S428/90, A61B2019/0257, H01F7/0215
European ClassificationA61B19/02H, H01F7/02A1A, A61B19/10