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Publication numberUS3495590 A
Publication typeGrant
Publication date17 Feb 1970
Filing date15 Mar 1967
Priority date15 Mar 1967
Publication numberUS 3495590 A, US 3495590A, US-A-3495590, US3495590 A, US3495590A
InventorsZeiller Warren
Original AssigneeZeiller Warren
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Surgical cast and cast removal saw
US 3495590 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

' Feb. 17, 1970 w. ZEILLE R 3,495,590

SURGICAL CAST AND CAST REMOVAL SAW v Filed March 15, 1967 INVENTOR. WARREN ZE/LLE/i HTTOR/UE).

United States Patent 3,495,590 SURGICAL CAST AND CAST REMOVAL SAW Warren Zeiller, 910 Catalonia Ave., Coral Gables, Fla. 33134 Filed Mar. 15, 1967, Ser. No. 623,370 Int. Cl. A61f /04; A61b 17/14; B27b 33/02 US. Cl. 128-91 3 Claims ABSTRACT OF THE DISCLOSURE A cast removal saw for removing reinforced cast materials in sleeve form from snug encompassing relation of the body of a patient, the cast having a liner means between the skin of the patient and the outer shell of the cast, the saw being a single flexible metal thread having a helicoidal recess in the surface with the crests between the recesses having a sharp edge and the saw being of a length greater than the longitudinal length of the cast and nested between the liner and the outer shell with the ends of the saw thread being folded back on the exterior surface of the shell and having gripping means connected thereto for reciprocally moving the saw to remove the cast from the patients body.

This invention relates to an improved saw for removing a cast from the body of a patient.

In the past it has been known to provide saws of slender rod material having a sharp edged groove extending along the length thereof, such slender rod saws being useful, for instance, hacksaws. Also, for instance, in brain surgery it has been known to drill spaced holes in the honey material of the skull and pass a length of saw which is flexible between the holes so that the ends of the saw may be reciprocally moved to saw through the thickness of the skull between the holes.

In the prior art there have been numerous types of blades which have been attempted for use in removing surgical casts from patients, such as a conventional oscillating blade. While these types of blades have been useful,

there have been accidents, and it is generally accepted that even in the hands of a skilled operator accidents may happen readily causing an injury to the patient having the cast removed, which injury is not visible to the operators eye until the cast has been removed and the extent of the damage can then be determined and remedial action taken. This invention in combination with the surgical cast provides means for reinforcing a portion of the human body and for removing of the cast without damage to underlying tissue or flesh in a rapid and expeditious manner.

This invention relates to an improved surgical cast including a saw for removing the cast, the said saw being imbedded in the cast between the interior liner means which protects the skin and the exterior outer shell, and the said saw comprising a flexible metal thread having a helicoidal recess defining a sharp cutting edge spirally extending the length of the thread, the length of the thread being longer than the longitudinal length of the cast and with the distal or terminal ends of the thread being folded back on the exterior of the shell portion of the cast and provided with gripper means to reciprocally move the saw back and forth while an outwardly directed force or radial force with respect to the center line of the cast is applied to cause the sharpened edge to cut through the cast to remove it.

It is, accordingly, an object of this invention to provide an improved cast including an imbedded surgical saw and an improved saw for removing surgical casts.

In accordance with these and other objects which will become apparent hereinafter, the instant invention will now be described with reference to the accompanying dram'ng illustrating a preferred embodiment thereof.

In the drawings:

FIGURE 1 is a schematic illustration of human figure including surgical casts incorporating the instant invention for various portions of the body;

FIGURE 2 is a typical cross-sectional view of a surgical cast of FIGURE 1 as applied to a body member;

FIGURE 3 is an elevational view of a flexible metal thread saw of the present invention;

FIGURE 4 is an enlarged elevational view of the length of the saw designated by the arrowed line 4-4 in FIG- URE 3;

FIGURE 5 is a cross-sectional view taken along the line 55 of FIGURE 4 and looking in the direction of the arrows;

FIGURE 6 illustrates an alternate embodiment of a gripper means for the ends of the saw.

Referring to the drawings wherein like reference characters designate like or corresponding parts throughout the different views, and referring particularly to FIG- URE 1, the numeral 12 generally designates a. surgical cast for the trunk of a patient, the numeral 14 a surgical cast for the upper arm, lower arm, or lower leg of a patient, and the numeral 16 designates a surgical cast for the leg length of a patient, which is substantially similar in all material respects to that of the trunk cast as far as this invention is concerned.

Referring to FIGURE 2 in which the surgical cast is shown in cross section, the body member to be treated is designated by the numeral 18 and in practice, when a surgical cast has been applied, the outer fleshy surface 20 of the body portion of the patient is provided With a means 24 to act as a liner between said fleshy surface and the outer shell 26. The liner means includes ordinarily two portions, a skin contacting portion, such as an elasticized fabric sleeve 22, and a jacket 23, preferably of yieldable padding material, such as cotton, which is adapted to cohere when pressed together so that the fibers intermingle. The outer shell is of reinforced cast material such as gauze impregnated with set plaster, which is conventional in the art.

Referring to FIGURE 3, the saw 30 is seen to include a main length 32 which is longer than the distance A which characterizes the trunk cast length or the lower leg cast length, or, in the case of an upper arm cast, the length B, so that there are terminal length portions 34 and 36 each in the order of two to three inches. To the distal ends 38 and 40 of the respective end portions a gripper means is provided. In the preferred embodiment a loop, such as that designated by the numeral 42, having a smooth rubberized surface, may be employed. The ends of the loop are connected by a suitable fastening means, such as the connector element 44, to the ends of the end portions.

While the main length of the saw will be described more fully hereinafter, it will be apparent at this point that, by reason of the fact that the saw 30 is imbedded intermediate the liner and the outer shell, reciprocal motion of the saw through the permitted stroke length, of, in the order of four to six inches, will cause the saw teeth to bite into the cast as it is reciprocated with a constant applied outward or radial force by a user.

Referring to FIGURE 4, which is an enlarged portion of the length of the saw shown in FIGURE 3 as is designated by the arrowed line 4-4 therearound, it 'will be seen that an endless or continuous spiral groove is provided in the exterior surface of the thread extending between the ends. In the preferred embodiment, the groove is characterized by a shallow having a tapered side from .the main diameter of the thread to a point of maximum depth and a relatively straight or sharp side extending fromthe point of maximum depth to a spiral edge radially outwardly of the main surface of the thread and thence tapering to the main length. The peak between the straight or sharp side of the groove and the main surface of the saw thread comprises a sharpened helicoidal cutting edge. In FIGURE 6 there is shown an alternative embodiment of the gripper means for the ends of the saw. A ring is looped by an end portion of the saw and held in place by a crimped sleeve, all as is well known in the art.

The size of the thread of the saw is preferably between about .020" diameter and .040"; however, it is important to realize that variations in the size of of the wire may be employed Within the spirit of this invention which contemplates the use of a flexible saw and one which is not of such a large diameter so as to be objectionable when nested beneath the shell of the cast of a patient.

The saw thread material is preferably of steel which is of the spring tempered type and since it is preferred that the sharp outer edge of the groove radially outwardly of .the main surface of the thread be a hardened edge, it has been found that a chrome material on the outer surface of the wire is preferred. It is to be realized that three main lengths may be employed; however, since the patient may be an animal or have a varying length requirement because of a bone fracture or the like for the cast, other lengths of the saw herein taught may by employed other than one or two or three predetermined lengths. In manufacturing the ends of the saw may be dipped in a plasticized or fiowable rubber material to harden as an outer lining for the ends which may then be loped back upon themselves to provide a gripping means for reciprocally moving the saw relative to the shell of the cast to cut it.

Referring to FIGURES 4 and 5 it will be seen that the groove in the preferred embodiment is formed by pushing as it were the metal of a helicoidally extending area on the surface of the 'wire so that this area is characterized by a margin which is somewhat depressed by reason of a displacement of metal which is raised so that the central zone of this area is sharpened and slopes to an opposing margin to merge and blend with the main surface of the thread.

What is claimed is:

1. In combination an open-ended cast assembly including liner means for overlying the flesh of a patient upon whom the cast is adapted to be disposed,

said cast assembly including an outer shell of reinforced, rigid cast material; and an elongated, metal saw-thread embedded between said cast assembly immediately beneath and in direct contact with said rigid cast material and above said liner means,

said saw-thread having opposite ends extending be yond ends of said rigid cast material and being folded upon themselves at opposite ends of the rigid cast,

gripping means on opposite end of the saw-thread facilitating reciprocation of the saw-thread and cutting of the rigid cast material,

said saw-thread having a helicoidal cutting tooth extending from end-to-end and having a cross section including a radial side terminating in a lateral, substantially normal base, said side forming an edge with an angularly disposed opposite side merging into the outer surface of the saw-thread.

3. The structure as claimed in claim 1 in which said saw-thread diameter is in a range from .020 and .040, comprises a spring-tempered steel, and is chrome-metal coated.

3. The structure is claimed in claim 1 in which said gripping means comprises a resilient-material coated closed loop integral with opposite ends of said sawthread, said closed loop normally overlying the rigid outer cast material when the cast assembly is initially formed whereby the loops are readily accessible for cast removal.

References Cited UNITED STATES PATENTS 1,770,157 7/1930 Humphries 30-350 XR 2,008,282 7/1935 Keen 30-350 XR 2,514,609 7/1950 Roy 143133.4 2,519,520 8/1950 Waxlax 12891.1 2,749,949 6/1956 Tramerye 31 XR 2,752,964 7/1956 Prusinski 30166 XR 2,878,806 3/1959 French 12891.1 3,040,740 6/1962 Parker 12883 RICHARD A. GAUDET, Primary Examiner R. L. FRANKS, Assistant Examiner US. Cl. X.R.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1770157 *23 Jun 19278 Jul 1930James C PattenCutting implement
US2008282 *31 Mar 193216 Jul 1935 Chromium plated abticle and method
US2514609 *20 Aug 194611 Jul 1950Roy Albert ESpiral saw blade
US2519520 *6 Nov 194522 Aug 1950Waxlax Chester ECast cutting device
US2749949 *22 Jun 195312 Jun 1956Tubest SaFlexible spiral twisted saw
US2752964 *15 Apr 19533 Jul 1956Stanley PrusinskiFlexible hand saw
US2878806 *4 Mar 195524 Mar 1959French Gordon RCast cutting device
US3040740 *20 Nov 195726 Jun 1962San Francisco Res CorpPrefabricated pad for surgical casts and the like and method for manufacturing the same
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3651844 *24 Feb 197028 Mar 1972Barnes Terry B CAll purpose saw
US4709699 *6 Aug 19861 Dec 1987Fort Wayne Metals Research Products CorporationSurgeon's Gigli saw and method
US4883460 *25 Apr 198828 Nov 1989Zanetti Paul HTechnique for removing deposits from body vessels
US4945903 *28 Apr 19897 Aug 1990Max AlperAnti-itch cast
US5131150 *11 Apr 199121 Jul 1992Muehling Anthony AFlexible saw
US5725530 *19 Jun 199610 Mar 1998Popken; John A.Surgical saw and methods therefor
US5752420 *20 Nov 199619 May 1998Connors; David R.Apparatus and method for cutting pipe
US5944675 *16 Jan 199731 Aug 1999Gore Enterprise Holdings, Inc.Cast removal aid
US74978609 Jul 20043 Mar 2009Stryker CorporationSurgical sagittal saw including a handpiece and a removable blade assembly, the blade assembly including a guide bar, a blade head capable of oscillatory movement and a drive rod for actuating the blade head
US755330715 Oct 200530 Jun 2009Baxano, Inc.Devices and methods for tissue modification
US755534315 Oct 200530 Jun 2009Baxano, Inc.Devices and methods for selective surgical removal of tissue
US757881913 Jul 200625 Aug 2009Baxano, Inc.Spinal access and neural localization
US773896815 Oct 200515 Jun 2010Baxano, Inc.Devices and methods for selective surgical removal of tissue
US773896921 Jan 200915 Jun 2010Baxano, Inc.Devices and methods for selective surgical removal of tissue
US774063115 Oct 200522 Jun 2010Baxano, Inc.Devices and methods for tissue modification
US785781329 Aug 200628 Dec 2010Baxano, Inc.Tissue access guidewire system and method
US788753813 Mar 200615 Feb 2011Baxano, Inc.Methods and apparatus for tissue modification
US791884915 Oct 20055 Apr 2011Baxano, Inc.Devices and methods for tissue access
US793883017 Apr 200610 May 2011Baxano, Inc.Powered tissue modification devices and methods
US795957731 Mar 200814 Jun 2011Baxano, Inc.Method, system, and apparatus for neural localization
US7963915 *15 Oct 200521 Jun 2011Baxano, Inc.Devices and methods for tissue access
US804329215 Dec 200825 Oct 2011Stryker CorporationSurgical sagittal saw blade including a guide bar, a blade head and drive rods for pivoting the blade head
US80480804 May 20061 Nov 2011Baxano, Inc.Flexible tissue rasp
US806229816 Mar 200722 Nov 2011Baxano, Inc.Flexible tissue removal devices and methods
US806230016 Mar 200722 Nov 2011Baxano, Inc.Tissue removal with at least partially flexible devices
US809245613 Jan 200910 Jan 2012Baxano, Inc.Multiple pathways for spinal nerve root decompression from a single access point
US819243515 Oct 20055 Jun 2012Baxano, Inc.Devices and methods for tissue modification
US819243626 Nov 20085 Jun 2012Baxano, Inc.Tissue modification devices
US822139722 Apr 200917 Jul 2012Baxano, Inc.Devices and methods for tissue modification
US825735627 May 20084 Sep 2012Baxano, Inc.Guidewire exchange systems to treat spinal stenosis
US830351620 Apr 20116 Nov 2012Baxano, Inc.Method, system and apparatus for neural localization
US83667126 Dec 20115 Feb 2013Baxano, Inc.Multiple pathways for spinal nerve root decompression from a single access point
US839410225 Jun 201012 Mar 2013Baxano, Inc.Surgical tools for treatment of spinal stenosis
US839864127 Dec 201119 Mar 2013Baxano, Inc.Tissue modification devices and methods
US84039326 May 201126 Mar 2013Stryker CorporationIntegrated cutting guide and sagittal saw blade assembly
US84092064 May 20102 Apr 2013Baxano, Inc.Tissue modification devices and methods
US841965316 Jul 200916 Apr 2013Baxano, Inc.Spinal access and neural localization
US843088117 Apr 200630 Apr 2013Baxano, Inc.Mechanical tissue modification devices and methods
US85510971 Nov 20108 Oct 2013Baxano Surgical, Inc.Tissue access guidewire system and method
US856841617 Aug 201229 Oct 2013Baxano Surgical, Inc.Access and tissue modification systems and methods
US857990226 Mar 201212 Nov 2013Baxano Signal, Inc.Devices and methods for tissue modification
US85857046 Oct 201119 Nov 2013Baxano Surgical, Inc.Flexible tissue removal devices and methods
US861374520 May 201124 Dec 2013Baxano Surgical, Inc.Methods, systems and devices for carpal tunnel release
US861716320 May 201131 Dec 2013Baxano Surgical, Inc.Methods, systems and devices for carpal tunnel release
US864734631 May 201211 Feb 2014Baxano Surgical, Inc.Devices and methods for tissue modification
US865213823 Sep 201118 Feb 2014Baxano Surgical, Inc.Flexible tissue rasp
US866322814 Sep 20114 Mar 2014Baxano Surgical, Inc.Tissue modification devices
US868500916 May 20111 Apr 2014Covidien LpThread-like knife for tissue cutting
US870271026 Feb 201322 Apr 2014Stryker CorporationSurgical sagittal saw capable of actuating a blade assembly that includes a static bar and a drive rod
US880162629 Dec 201112 Aug 2014Baxano Surgical, Inc.Flexible neural localization devices and methods
US884563711 Sep 201330 Sep 2014Baxano Surgical, Inc.Tissue access guidewire system and method
US884563914 Jan 201130 Sep 2014Baxano Surgical, Inc.Tissue modification devices
US8882026 *3 Jun 201111 Nov 2014Centre National D'etudes Spatiales (C.N.E.S.)Method and device for opening an inflated wall
US907252627 Feb 20147 Jul 2015Stryker CorporationSurgical sagittal saw blade assembly that includes a guide bar including bottom, inner and outer bars and a blade head that pivots around the inner bar
US910138625 Oct 201011 Aug 2015Amendia, Inc.Devices and methods for treating tissue
US91256821 Feb 20138 Sep 2015Amendia, Inc.Multiple pathways for spinal nerve root decompression from a single access point
US92479524 Jan 20112 Feb 2016Amendia, Inc.Devices and methods for tissue access
US93142531 Feb 201319 Apr 2016Amendia, Inc.Tissue modification devices and methods
US932061825 Oct 201326 Apr 2016Amendia, Inc.Access and tissue modification systems and methods
US934549113 Feb 201424 May 2016Amendia, Inc.Flexible tissue rasp
US935174115 Nov 201331 May 2016Amendia, Inc.Flexible tissue removal devices and methods
US945682910 Jun 20134 Oct 2016Amendia, Inc.Powered tissue modification devices and methods
US94630293 Mar 201411 Oct 2016Amendia, Inc.Tissue modification devices
US946304115 Dec 201511 Oct 2016Amendia, Inc.Devices and methods for tissue access
US94921513 Aug 201515 Nov 2016Amendia, Inc.Multiple pathways for spinal nerve root decompression from a single access point
US952656718 Feb 201427 Dec 2016Covidien LpThread-like knife for tissue cutting
US955480826 Jun 201531 Jan 2017Stryker CorporationSurgical sagittal saw blade assembly that includes a guide bar, a blade that is pivotally mounted to the guide bar, the blade having a head that extends from a side edge of the guide bar and drive rods that pivot the blade
US9586254 *17 Oct 20127 Mar 2017Tokyo Wire Works, Ltd.Wire saw
US9776264 *24 Oct 20163 Oct 2017Mike ShawReciprocating cutter
US20060009796 *9 Jul 200412 Jan 2006Steven CarusilloSurgical sagittal saw and method of using same
US20060089609 *15 Oct 200527 Apr 2006Baxano, Inc.Devices and methods for tissue modification
US20060089633 *15 Oct 200527 Apr 2006Baxano, Inc.Devices and methods for tissue access
US20060089640 *15 Oct 200527 Apr 2006Baxano, Inc.Devices and methods for tissue modification
US20060094976 *15 Oct 20054 May 2006Baxano, Inc.Devices and methods for selective surgical removal of tissue
US20060095028 *15 Oct 20054 May 2006Baxano, Inc.Devices and methods for tissue access
US20060100651 *15 Oct 200511 May 2006Baxano, Inc.Devices and methods for tissue access
US20060122458 *15 Oct 20058 Jun 2006Baxano, Inc.Devices and methods for tissue access
US20060258951 *13 Jul 200616 Nov 2006Baxano, Inc.Spinal Access and Neural Localization
US20070123888 *4 May 200631 May 2007Baxano, Inc.Flexible tissue rasp
US20070213735 *17 Apr 200613 Sep 2007Vahid SaadatPowered tissue modification devices and methods
US20070260252 *16 Mar 20078 Nov 2007Baxano, Inc.Tissue Removal with at Least Partially Flexible Devices
US20080033465 *25 Sep 20067 Feb 2008Baxano, Inc.Multi-Wire Tissue Cutter
US20080086034 *29 Aug 200610 Apr 2008Baxano, Inc.Tissue Access Guidewire System and Method
US20080147084 *7 Dec 200719 Jun 2008Baxano, Inc.Tissue removal devices and methods
US20080161809 *3 Oct 20063 Jul 2008Baxano, Inc.Articulating Tissue Cutting Device
US20080275458 *27 May 20086 Nov 2008Bleich Jeffery LGuidewire exchange systems to treat spinal stenosis
US20080312660 *16 Jun 200818 Dec 2008Baxano, Inc.Devices and methods for measuring the space around a nerve root
US20090018507 *9 Jul 200815 Jan 2009Baxano, Inc.Spinal access system and method
US20090031568 *31 Jul 20075 Feb 2009Chung Cheng YangSaw blade having helical structure
US20090125036 *21 Jan 200914 May 2009Bleich Jeffery LDevices and methods for selective surgical removal of tissue
US20090138017 *15 Dec 200828 May 2009Steven CarusilloSurgical sagittal saw blade including a guide bar, a blade head and drive rods for pivoting the blade head
US20090149865 *26 Nov 200811 Jun 2009Schmitz Gregory PTissue modification devices
US20090171381 *12 Jan 20092 Jul 2009Schmitz Gregory PDevices, methods and systems for neural localization
US20090177241 *13 Jan 20099 Jul 2009Bleich Jeffery LMultiple pathways for spinal nerve root decompression from a single access point
US20100010334 *16 Jul 200914 Jan 2010Bleich Jeffery LSpinal access and neural localization
US20100321426 *17 Oct 200823 Dec 2010Kazuki SuzukiImage forming apparatus
US20100331883 *16 Jun 201030 Dec 2010Schmitz Gregory PAccess and tissue modification systems and methods
US20100331900 *25 Jun 201030 Dec 2010Baxano, Inc.Surgical tools for treatment of spinal stenosis
US20110046613 *1 Nov 201024 Feb 2011Gregory SchmitzTissue access guidewire system and method
US20110098708 *17 Apr 200628 Apr 2011Vahid SaadatPowered tissue modification devices and methods
US20110112539 *14 Jan 201112 May 2011Wallace Michael PTissue modification devices
US20110130758 *4 May 20062 Jun 2011Baxano, Inc.Flexible tissue rasp
US20110160731 *4 Jan 201130 Jun 2011Bleich Jeffery LDevices and methods for tissue access
US20110208197 *6 May 201125 Aug 2011Steven CarusilloIntegrated cutting guide and sagittal saw blade assembly
US20110224709 *20 May 201115 Sep 2011Bleich Jeffery LMethods, systems and devices for carpal tunnel release
US20110224710 *20 May 201115 Sep 2011Bleich Jeffery LMethods, systems and devices for carpal tunnel release
US20110297784 *3 Jun 20118 Dec 2011Centre National D'etudes Spatiales (C.N.E.S)Method and device for opening an inflated wall
US20140222004 *17 Oct 20127 Aug 2014Tokyo Wire Works, Ltd.Wire Saw
US20140228792 *16 Apr 201414 Aug 2014Bluesky Medical Group IncorporatedEnclosure-based reduced pressure treatment system
US20170043420 *24 Oct 201616 Feb 2017Mike ShawReciprocating cutter
DE2901679A1 *17 Jan 197911 Dec 1980Bock Karl Joseph Dr MedPlaster bandage cutting device - with saw blade movable inside embedded flexible strip
EP1184119A1 *31 Aug 20006 Mar 2002N.V. Bekaert S.A.Tool for cutting organic material comprising a twisted cutting wire having a sharp pointed cross-section
WO1997026022A1 *17 Jan 199724 Jul 1997W.L. Gore & Associates, Inc.A cast removal aid
Classifications
U.S. Classification602/9, 30/520, 606/176, 30/380, 30/166.3
International ClassificationB23D57/00, B23D61/18, A61F15/02, A61F15/00, B23D61/00
Cooperative ClassificationB23D61/185, A61F15/02, B23D57/0015
European ClassificationB23D61/18B, B23D57/00B1, A61F15/02