US2746452A - Cast-cutting device - Google Patents

Cast-cutting device Download PDF

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US2746452A
US2746452A US342403A US34240353A US2746452A US 2746452 A US2746452 A US 2746452A US 342403 A US342403 A US 342403A US 34240353 A US34240353 A US 34240353A US 2746452 A US2746452 A US 2746452A
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cast
wire
tube
shaft
rolls
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US342403A
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Rodger D Saylors
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    • 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
    • A61F15/00—Auxiliary appliances for wound dressings; Dispensing containers for dressings or bandages
    • A61F15/02—Devices for cutting bandages of any kind, e.g. shears, cast-cutting saws

Definitions

  • This invention relates to a device for cutting or severingsurgical casts and to a method. of forming and removfing casts. 1
  • An object of this invention is to provide a device which severs a cast cleanly without causing dust and w' hout use of sharp or fast moving instruments; T 1
  • a further object of this invention is to provide a methodof foiinin'g' a cast aird're'rriovin'g the cast which permits quick, simple, and danger-free removal of the cast.
  • a further object of this invention is to provide such a method in which a.wir'e"i's"'disposed" in the cast and is drawn through the cast "to severth'e cast so that the cast can bebroken openand removed.
  • a t r is i v nt n t p dr d awire pulling device constructed to roll on a cast while drawing a wire through the cast so that the cast is severed by means of force applied directly to the cast.
  • a further object of this invention is to provide a method of formingand removing a cast in which a tube is disposed in the cast when the cast is formed so that a wire can be threaded through the cast when the cast is to be removed.
  • Figure 1 is a view in lengthwise section showing a cast in position on a patients arm, the cast having been par tially severed with the aid of a cast-severing device COD: structed in accordance with an embodiment of this invention.
  • Fig. 2 is a view in section taken along a line II-II in Fig.
  • Fig. 3 is an enlarged fragmentary perspective view
  • Fig. 4 is a fragmentary view in side elevation showing the ratchet of the cast-severing device, the view being taken in the direction of the arrows IV-IV in Fig. 2;
  • Fig. 5 is a fragmentary plan view looking in the direction of the arrows V-V in Fig. 1;
  • Fig. 6 is a viewin transverse section of another cast showing wire guiding tubes in place therein;
  • Fig. 7 is a view in side elevation of a device constructed in accordance with another embodiment of this invention.
  • Fig. 8 is .a view in section taken on line VIIIVIII in Fig. 7. p p In the following detailed description, and the drawing, like reference characters indicate like parts.
  • a-cast 10 is shown in place on an arm 12 of a patient.
  • a padding 13 or the'like covers the arm of a patientand the cast'is built on top of the padding.
  • a split tube 14 is placed on top of the padding before the cast is formed.
  • the split tube is held in place with the split 15 thereof away from the arm by narrow pieces 16 ofpressure-sensitive adhesive tape.
  • the tube 14 is formed of the vinyl resin commercially known as Vinylite or similar material. Then the cast is formed over the tube and padding.
  • a length of piano wire 17 is threaded through tube 14.
  • One end of the wire 17 isattached to a clip 18.
  • the clip 18 is of channel shape and is provided with an opening 19 in the Web thereof through which the wire passes;
  • the wire is attached to the clip 18, and one flange of the clip 18 is wedged between padding 13 and the body of the cast 10 with the other flange of the clip 18 on top of the cast so that the clip 18 firmly anchors one end of the wire to the cast.
  • the tube 14 may then be withdrawn from the cast.
  • the tube is split in Figs. 1 and 2.
  • the device 21 includes frame members 22 and 23 which are rigidly held in spaced parallel relation by connecting members 24.
  • a handle 25 for ho1ding and guiding the device is attached to frame member 23.
  • the framemembers 22 and 23 support a roller shaft 26 on which cast-engaging rolls 27 and 28 are mounted.
  • the rolls 27 and 28 are spaced from frame members 22 and 23, respectively, byspacers 28' and 28" so that the position of the rolls on shaft 26 remains constant. As shown in Fig. 2, the rolls 27 and 28 are separated by a spacer 29 on which the Wire bears, as illustrated in Fig. 1, and the distance between the rolls (see Fig. 2) is sufficient to permit the wire 17 to pass freely therebetween. As the wire is drawn between the rolls 27 and 28, the rolls ride on the cast and rollalong the cast.
  • the frame members 22 and 23 further support a main gear shaft 31 on which a main spur gear .32 is mounted and on which the spur gear rotates.
  • Spur gear 32 is provided with an elongated hub 33 having a wire receiving opening 34 therethrough. The free end of the wire 17 is threaded through opening 34 so that when the gear 32 is turned, the wire is drawn upwardly through the cast between rolls 27 and 28 and is Wound upon hub 33.
  • the spur gear 32 is turned by a pinion 36 mounted on a shaft 37.
  • the shaft37 is turned by'means of a handle 38.
  • the head of the handle 38 may be provided with a ratchet 39 as indicated in Fig. 4.
  • the tube 14 may be withdrawn before the wire is attached to the cast-severing device 21.
  • the tube pulls away from the wire, separating at the split.
  • the wire 17 may be imbedded in the cast at the time the cast is formed, in which event, it is unnecessary'to use a tube for threading the wire.
  • the tube is used for threading the wire, it is possible to take X-ray pictures of the cast in which there is no line as would appear in X-ray photographs taken with the wire in place.
  • the wire used in severing the cast is a strong stainless steel wire of the type commonly known as piano wire.
  • the wire is drawn upwardly through the cast and severs both the plaster and gauze of the cast as the wire is drawn therethrough.
  • a wire having a diameter of 0.026 inch is satisfactory for this purpose.
  • the cast When a cast 41 is of unusual thickness, as indicated in Fig. 6, the cast may be formed with two or more tubes 42 and 43 therein so that the cast may be severed in layers.
  • a wire 44 is inserted through tube 42 and a second wire 46 is inserted through the tube 43.
  • the tube 42 is then removed,
  • Figs. 7 and 8 In Figs. 7 and 8 is shown another wire pulling device.
  • the device of Figs. 7 and 8 includes a gear 51 and a pinion 52 in mesh therewith.
  • the gear 51 and pinion 52 are mounted between frame members 53 and 54.
  • the shaft 56 of gear 51 projects through frame member 54 and carries a wire windup roll 57.
  • Roll '57 is provided with an opening 58 for receiving an end of wire 59.
  • a roll shaft 61 is supported by the frame members 53 and 54 below gear 51.
  • the shaft 61 projects through frame member 54 and supports rolls 62 and'63.
  • Shafts 56 and 61 are linked by a strut 66.
  • the rolls 62 and 63 are cast-engaging rolls and can ride on a cast in the same manner as the rolls of the other device.
  • the rolls are spaced from each other by a wire-engaging spacer 67.
  • the rolls are spaced from frame member 54 and from strut 66 by spacer washers 68 and 69,-respectively.
  • the gears 51 and 52 are turned by turning a handle 71.
  • the roll 57 turns with gear 51 and as the handle is turned, the wire is wrapped around a roll 57.
  • cotter pins 72 and 73 can be removed from shafts 56 and 61, respectively, and the strut 66 can be slipped off'the shafts, whereupon the wire on roll 57 can be slid oif the roll.
  • a device for cutting a cast having a wire therein which comprises a framework, a pair of coaxial spaced rollers rotatably mounted on said framework for rolling on the cast, a shaft rotatably mounted on said framework spaced from the axis of the rollers, means on said shaft for attaching the wire to said shaft, and shaft turning means on the device connected to said shaft for turning said shaft to draw .the wire through the cast and between the rollers to sever'tlie cast.
  • a device for cutting a cast having a wire therein which comprises a framework, roller means rotatably mounted on saidframew'ork and disposed to roll on the cast, said roller means having an annular groove adjacent the center thereof, a shaft rotatably mounted on said framework in spaced relation to the axis of the roller means, means on the shaft for attaching the wire thereto, and means on the device for turning said shaft to thereby draw the wire through the cast and groove, whereby the cast is sheared by said wire and saidroller means.
  • a device for cutting a cast having a wire therein which comprises a framework, roller means rotatably mounted on said framework and disposed to roll on the cast, said roller means having' a groove adjacent the center thereof, a shaft rotatably mounted on said framework in spaced relation to the axisof the roller means, a drum mounted on saidshaft and projecting. cantilever fashion from the framework, means on the drum for attaching the wire thereto, and means on the device for turning said shaft and saiddrum to thereby draw-the wire through the cast andgroove, whereby the cast is sheared by said wire and said rollermeans.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Wire Processing (AREA)

Description

y 2. 1956 R. D. SAYLORS 2,746,452
CAST-CUTTING DEVICE Filed March 16, 1955 INVENTOR. M RODGER D. SAYLORS "2,746,452 cAsr-currns onvrcn. Rodger 1). sa lar oincinnatgohio ApplicationMarchlG," 1953, Serial No; 342,403
I 3 Claims.'(C l. 12'8--1) I y This invention relates to a device for cutting or severingsurgical casts and to a method. of forming and removfing casts. 1
, It is commonpractice where a cast is to be removed, to
' cutithe cast-lengthwise thereof so that the castcan be removed. The" cutting of a cast with a conventional knifeor shears is a diflicult andunpleasant job because I of the hardness of the gauze-laminated plaster of which casts are formed and because of the tendency of plaster to form powder. I a 1 An object of this invention is to provide a device which severs a cast cleanly without causing dust and w' hout use of sharp or fast moving instruments; T 1
A further object of this invention is to provide a methodof foiinin'g' a cast aird're'rriovin'g the cast which permits quick, simple, and danger-free removal of the cast.
A further object of this invention is to provide such a method in which a.wir'e"i's"'disposed" in the cast and is drawn through the cast "to severth'e cast so that the cast can bebroken openand removed.
' Are a t r is i v nt n t p dr d awire pulling device constructed to roll on a cast while drawing a wire through the cast so that the cast is severed by means of force applied directly to the cast.
A further object of this invention is to provide a method of formingand removing a cast in which a tube is disposed in the cast when the cast is formed so that a wire can be threaded through the cast when the cast is to be removed.
From the following detailed description, and the accompanying drawing, the above and other objects and features of the invention will be apparent to those having ordinary skill in the art to which it pertains.
Figure 1 is a view in lengthwise section showing a cast in position on a patients arm, the cast having been par tially severed with the aid of a cast-severing device COD: structed in accordance with an embodiment of this invention.
Fig. 2 is a view in section taken along a line II-II in Fig.
Fig. 3 is an enlarged fragmentary perspective view,
partly in section showing a cast with a wire guiding tube in place therein;
Fig. 4 is a fragmentary view in side elevation showing the ratchet of the cast-severing device, the view being taken in the direction of the arrows IV-IV in Fig. 2;
Fig. 5 is a fragmentary plan view looking in the direction of the arrows V-V in Fig. 1;
Fig. 6 is a viewin transverse section of another cast showing wire guiding tubes in place therein;
Fig. 7 is a view in side elevation of a device constructed in accordance with another embodiment of this invention; and
Fig. 8 is .a view in section taken on line VIIIVIII in Fig. 7. p p In the following detailed description, and the drawing, like reference characters indicate like parts.
2,746,452 Patented May-22, 1956 In Figs. l-3 inclusive, a-cast 10 is shown in place on an arm 12 of a patient. As shown in Fig. 3, a padding 13 or the'like, covers the arm of a patientand the cast'is built on top of the padding. A split tube 14 is placed on top of the padding before the cast is formed. As shown in Fig. 3, the split tube is held in place with the split 15 thereof away from the arm by narrow pieces 16 ofpressure-sensitive adhesive tape. The tube 14 is formed of the vinyl resin commercially known as Vinylite or similar material. Then the cast is formed over the tube and padding. 1
When it is time to remove the cast, a length of piano wire 17 is threaded through tube 14. One end of the wire 17 isattached to a clip 18. As shown in Figs. 1 and 5, the clip 18 is of channel shape and is provided with an opening 19 in the Web thereof through which the wire passes; The wire is attached to the clip 18, and one flange of the clip 18 is wedged between padding 13 and the body of the cast 10 with the other flange of the clip 18 on top of the cast so that the clip 18 firmly anchors one end of the wire to the cast. The tube 14 may then be withdrawn from the cast. As shown, the tube is split in Figs. 1 and 2. The device 21 includes frame members 22 and 23 which are rigidly held in spaced parallel relation by connecting members 24. A handle 25 for ho1ding and guiding the device is attached to frame member 23. The framemembers 22 and 23 support a roller shaft 26 on which cast- engaging rolls 27 and 28 are mounted.
The rolls 27 and 28 are spaced from frame members 22 and 23, respectively, byspacers 28' and 28" so that the position of the rolls on shaft 26 remains constant. As shown in Fig. 2, the rolls 27 and 28 are separated by a spacer 29 on which the Wire bears, as illustrated in Fig. 1, and the distance between the rolls (see Fig. 2) is sufficient to permit the wire 17 to pass freely therebetween. As the wire is drawn between the rolls 27 and 28, the rolls ride on the cast and rollalong the cast.
The frame members 22 and 23 further support a main gear shaft 31 on which a main spur gear .32 is mounted and on which the spur gear rotates. Spur gear 32 is provided with an elongated hub 33 having a wire receiving opening 34 therethrough. The free end of the wire 17 is threaded through opening 34 so that when the gear 32 is turned, the wire is drawn upwardly through the cast between rolls 27 and 28 and is Wound upon hub 33.
The spur gear 32 is turned by a pinion 36 mounted on a shaft 37. The shaft37 is turned by'means of a handle 38. The head of the handle 38 may be provided with a ratchet 39 as indicated in Fig. 4.
As indicated above, the tube 14 may be withdrawn before the wire is attached to the cast-severing device 21. However, I prefer to attach the wire to the device and draw the Wire taut before I withdraw the tube. As the tube is withdrawn, the tube pulls away from the wire, separating at the split.
If desired, the wire 17 may be imbedded in the cast at the time the cast is formed, in which event, it is unnecessary'to use a tube for threading the wire. However, when the tube is used for threading the wire, it is possible to take X-ray pictures of the cast in which there is no line as would appear in X-ray photographs taken with the wire in place.
The wire used in severing the cast is a strong stainless steel wire of the type commonly known as piano wire. The wire is drawn upwardly through the cast and severs both the plaster and gauze of the cast as the wire is drawn therethrough. A wire having a diameter of 0.026 inch is satisfactory for this purpose.
When a cast 41 is of unusual thickness, as indicated in Fig. 6, the cast may be formed with two or more tubes 42 and 43 therein so that the cast may be severed in layers. When the cast 41 is to be removed, a wire 44 is inserted through tube 42 and a second wire 46 is inserted through the tube 43. The tube 42 is then removed,
and wire 44 is drawn upwardly through the cast to sever the upper portion thereof. Then the lower tube 43 is removed and the lower wire 46 is drawn through the cast to sever the remainder of the cast.
In Figs. 7 and 8 is shown another wire pulling device. The device of Figs. 7 and 8 includes a gear 51 and a pinion 52 in mesh therewith. The gear 51 and pinion 52 are mounted between frame members 53 and 54. The shaft 56 of gear 51 projects through frame member 54 and carries a wire windup roll 57. Roll '57 is provided with an opening 58 for receiving an end of wire 59.
A roll shaft 61 is supported by the frame members 53 and 54 below gear 51. The shaft 61 projects through frame member 54 and supports rolls 62 and'63. Shafts 56 and 61 are linked by a strut 66. The rolls 62 and 63 are cast-engaging rolls and can ride on a cast in the same manner as the rolls of the other device. The rolls are spaced from each other by a wire-engaging spacer 67. The rolls are spaced from frame member 54 and from strut 66 by spacer washers 68 and 69,-respectively.
The gears 51 and 52 are turned by turning a handle 71. The roll 57 turns with gear 51 and as the handle is turned, the wire is wrapped around a roll 57. When the wire has been wound on the roll 57, cotter pins 72 and 73 can be removed from shafts 56 and 61, respectively, and the strut 66 can be slipped off'the shafts, whereupon the wire on roll 57 can be slid oif the roll The devicesshown in the drawing and disclosed above are subject to structural modification without departing from the spirit and scope of the appended claims.
Having described my invention, what I claim as new and desire to secure by Letters Patent is:
l. A device for cutting a cast having a wire therein which comprises a framework,a pair of coaxial spaced rollers rotatably mounted on said framework for rolling on the cast, a shaft rotatably mounted on said framework spaced from the axis of the rollers, means on said shaft for attaching the wire to said shaft, and shaft turning means on the device connected to said shaft for turning said shaft to draw .the wire through the cast and between the rollers to sever'tlie cast.
2. A device for cutting a cast having a wire therein, which comprises a framework, roller means rotatably mounted on saidframew'ork and disposed to roll on the cast, said roller means having an annular groove adjacent the center thereof, a shaft rotatably mounted on said framework in spaced relation to the axis of the roller means, means on the shaft for attaching the wire thereto, and means on the device for turning said shaft to thereby draw the wire through the cast and groove, whereby the cast is sheared by said wire and saidroller means.
3. A device for cutting a cast having a wire therein which comprises a framework, roller means rotatably mounted on said framework and disposed to roll on the cast, said roller means having' a groove adjacent the center thereof, a shaft rotatably mounted on said framework in spaced relation to the axisof the roller means, a drum mounted on saidshaft and projecting. cantilever fashion from the framework, means on the drum for attaching the wire thereto, and means on the device for turning said shaft and saiddrum to thereby draw-the wire through the cast andgroove, whereby the cast is sheared by said wire and said rollermeans.
References Cited in the file of this patent UNITED STATES PATENTS 1,967,888 Kearsley July 24, 1934 2,342,695 Rinaldy' Feb. 29, 1944 FOREIGN PATENTS 72, 145 Austria July 25, 1916 888,595 Germany Sept. 3, 1953
US342403A 1953-03-16 1953-03-16 Cast-cutting device Expired - Lifetime US2746452A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896322A (en) * 1957-12-16 1959-07-28 Robert W Vose Tool for shearing sheet material
US3307537A (en) * 1964-03-24 1967-03-07 Gladys B Simon Orthopedic cast
US3867931A (en) * 1973-12-19 1975-02-25 Joseph A Babka Method for removing an orthopedic cast utilizing an embedded wire
US4227517A (en) * 1979-01-29 1980-10-14 Aguiar Robert H Cast cutting system
US4306923A (en) * 1979-05-01 1981-12-22 W. L. Gore & Associates, Inc. Method of slitting a plastic jacket of a conductive cable
US4819531A (en) * 1987-10-09 1989-04-11 Lawhon Stephen C Cutting apparatus and method for separating a vehicle glazing seam
US20130233842A1 (en) * 2012-03-12 2013-09-12 Cornelis Christianus Pys Vehicle Glass Removal System and Method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT72145B (en) * 1915-06-12 1916-07-25 Heinrich Anton Schellenberg Insoles for plaster casts.
US1967888A (en) * 1933-04-19 1934-07-24 Gen Electric Surgical appliance
US2342695A (en) * 1943-02-08 1944-02-29 Edward S Rinaldy Surgical cast
DE888595C (en) * 1950-12-21 1953-09-03 Paul Heinrich Dr Med Grossboel Method and device for cutting open plaster castings

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT72145B (en) * 1915-06-12 1916-07-25 Heinrich Anton Schellenberg Insoles for plaster casts.
US1967888A (en) * 1933-04-19 1934-07-24 Gen Electric Surgical appliance
US2342695A (en) * 1943-02-08 1944-02-29 Edward S Rinaldy Surgical cast
DE888595C (en) * 1950-12-21 1953-09-03 Paul Heinrich Dr Med Grossboel Method and device for cutting open plaster castings

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896322A (en) * 1957-12-16 1959-07-28 Robert W Vose Tool for shearing sheet material
US3307537A (en) * 1964-03-24 1967-03-07 Gladys B Simon Orthopedic cast
US3867931A (en) * 1973-12-19 1975-02-25 Joseph A Babka Method for removing an orthopedic cast utilizing an embedded wire
US4227517A (en) * 1979-01-29 1980-10-14 Aguiar Robert H Cast cutting system
US4306923A (en) * 1979-05-01 1981-12-22 W. L. Gore & Associates, Inc. Method of slitting a plastic jacket of a conductive cable
US4819531A (en) * 1987-10-09 1989-04-11 Lawhon Stephen C Cutting apparatus and method for separating a vehicle glazing seam
US20130233842A1 (en) * 2012-03-12 2013-09-12 Cornelis Christianus Pys Vehicle Glass Removal System and Method
US9992820B2 (en) * 2012-03-12 2018-06-05 Cornelis Christianus Pys Vehicle glass removal system and method

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