Removable leg walker

• US 5,078,128 A
• Filed: 06/27/1990
• Issued: 01/07/1992
• Est. Priority Date: 06/27/1990
• Status: Expired due to Term

• Current Assignee: Ossur hf
• Original Assignee: Royce Medical Company (Ossur hf)
• Inventors: Kasper, Thomas A., Grim, Tracy E.
• Primary Examiner(s): Bahr, Robert
• Assistant Examiner(s): BAHR, JENNIFER DOYLE
• Application Number:
  US07/542,571
• Time in Patent Office: 559 Days
• Field of Search: 128/80 R, 128/80 C, 128/80 D, 128/80 E, 128/80 F, 128/80 G, 128/80 H, 128/82, 128/83, 128/83.5, 128/87 R, 128/88, 128/89 R, 128/90, 128/581, 128/586, 128/589
• US Class Current: 602/23
• CPC Class Codes: A61F 5/0127 for the feet A61F5/0111 takes precedence

Abstract

An improved, lightweight and removable leg walker is provided for stabilizing and rapidly healing lower leg injuries of a patient. The injured limb is disposed in a removable inner ankle bootie whose interior is partially covered with inflatable support bladders. While the foot is secured within the booties, it is then inserted into and additionally supported by a removable soft goods-type support. The soft goods-type support is securely attached to a walker frame by a combination of strap fasteners with Velcro attachments. Inflatable bladders are located along the inner surfaces of two strut bases and raised heel strip. A tongue portion of the soft goods-type support also includes an inflatable bladder which provides additional support to the injured limb. These inflatable bladders encourage proper circulation from the lower leg to the heart. The walker frame comprises a pair of strut bases and struts in order to prevent inversion and eversion of the ankle. The full length sole portion of the walker is novelly constructed of two halves joined together. This construction is structurally superior to other walkers and braces insofar as it costs less and weighs less than other walkers currently manufactured. The heel portion of the sole also is constructed to form a cantilever spring, shock absorbing element.

Claims

1. A prefabricated orthopaedic leg walker assembly for treatment of ankle and foot injuries and fractures of the lower tibia and/or fibula comprising:

a full-length sole;

a pair of rigid, or semi-rigid parallel strut members extending substantially vertically and upwardly from said sole to just below the knee;

a durable and resilient soft support for extending around the injured limb or joint and around the lower leg and foot;

means for securing said soft support around said lower leg and foot;

a plurality of fastening members for securing said soft support to said struts and said sole;

a removable, lightweight and flexible ankle bootie which is received into said soft support for providing additional support to said ankle and foot;

a raised strip member surrounding the heel of the patient;

a shock-absorbing member located at the heel portion of said sole;

said sole including a cantilevered shock absorbing means at the rear thereof; and

a plurality of resilient bladder support means mounted within said walker assembly for cushioning and stabilizing said limb or joint.

2. A leg walker as defined in claim 1 wherein said sole is constructed of a glass fiber reinforced mylon materials.

3. A leg walker as defined in claim 1 wherein said sole consists of two halves securely joined together along a vertical plane extending from the center of the front of said sole to the center of the rear of said sole.

4. A leg walker as defined in claim 3 wherein said sole consists of an upper and a lower sole plate and vertical webs separating said plates, forming a plurality of closed box structures.

5. A leg walker as defined in claim 1 wherein the bottom of said sole has substantially continuous curvature.

6. A leg walker as defined in claim 5 wherein the bottom of said sole is completely covered with and protected by a durable gripping material.

7. A leg walker as defined in claim 1 wherein said soft support includes a tongue member mounted to engage the top of the foot and shin.

8. A leg walker as defined in claim 7 wherein said soft support and said tongue member is constructed of a resilient, foam and fabric material.

9. A leg walker as defined in claim 8 wherein said soft support and said tongue member is covered with a hook receivable securing fabric.

10. A leg walker as defined in claim 9 wherein fine hook securing fabric means area located along an inner surface of one of the mating edges of said soft support.

11. A leg walker as defined in claim 10 wherein said soft support is secured around said injured limb or joint by folding said tongue member over and around the upper surface of the foot and shin and subsequently folding said fine hook securing fabric means of said soft support over said tongue member and connecting said fine hook securing fabric means to the outside surface of said soft support of said tongue member.

12. A leg walker as defined in claim 1 wherein said strut members comprise:

a pair of parallel rigid strut base members extending vertically and upwardly from said sole;

a pair of parallel and vertical splint attachments extending from said strut base members to just below the knee.

13. A leg walker as defined in claim 12 where in said splint attachments are secured to said strut base members by connecting them with metal pins and sonically welding said splint attachments to said strut base members.

14. A leg walker as defined in claim 1 wherein said fastening members are provided with mating fine hook and loop-type fastening material for adjustably securing said soft support to said struts.

15. A leg walker as defined in claim 12 wherein said strut base members include integrally molded slots for receiving said fastening members.

16. A leg walker as defined in claim 1 wherein said ankle bootie includes a plurality of fastening members for securing said bootie around the injured limb or joint.

17. A leg walker as defined in claim 1 wherein said resilient bladder support means includes an inflatable/deflatable bladder being formed of a laminate having an outer surface of a thin, smooth stretchable knit fabric, and an inner film bonded with an adhesive to said fabric.

18. A leg walker as defined in claim 17 wherein said soft support includes an adjustable and inflatable/deflatable bladder support means adjacent to the heel and ankle of the patient.

19. A leg walker as defined in claim 17 wherein said inner surface of said raised strip member, and a portion of the inner surface of said strut members, from the sole to just above the ankle, include an adjustable and inflatable/deflatable bladder support means.

20. A leg walker as defined in claim 1 wherein said resilient bladder support means are inflatable and deflatable.

21. A leg walker as defined in claim 20 wherein said resilient bladder support means being formed of a laminate, having an outer surface of a thin, smooth, stretchable knit fabric, and an inner thin film bonded by an adhesive to said fabric.

22. A leg walker as defined in claim 20 having an inflatable/deflatable bladder support means mounted to the inner surface of said raised strip member and a portion of the inner surface of said splint members, from the sole to just above the ankle.

23. A leg walker as defined in claim 20 having said inflatable/deflatable bladder support means affixed to the inner surface of said ankle bootie.

24. A leg walker as defined in claim 20 having said inflatable/deflatable bladder support means affixed to the inner surface of said soft support, adjacent to the ankle of the patient.

25. A leg walker as defined in claim 9 wherein said inflatable/deflatable bladder support means substantially covers and is affixed to the inside surface of said tongue member.

26. A leg walker as defined in claim 1 wherein said ankle bootie includes a first elongated, vertical pouch juxtaposed to the outside surface of the left side of said ankle bootie, and a second elongated vertical pouch juxtaposed to the outside surface of the right side of said ankle bootie, and said ankle bootie included a first and second rigid splint member mounted with said first and second pouches.

27. A leg walker as defined in claim 26 wherein said first and second rigid splint members are constructed of a rigid and lightweight plastic material.

28. A leg walker as defined in claim 26 wherein said rigid splint members are created by an activatable hardenable material.

29. A leg walker as defined in claim 1 wherein said sole is provided with a raised strip member extending around the heel and constructed of a resilient material.

30. A prefabricated orthopedic leg walker assembly for treatment of ankle and foot injuries and fractures of the lower tibia and/or fibula comprising:

a full-length sole;

a pair of rigid, parallel strut members extending substantially vertically and upwardly from said sole to just below the knee;

a durable and resilient soft support means for extending around and restricting the motion of said lower leg and foot;

a plurality of fastening members for securing said soft support means to said struts and said sole; and

a resilient, removable, lightweight and flexible ankle bootie which is received into said soft support means, including means for providing additional support to said ankle and foot.

31. A leg walker as defined in claim 30 further including a plurality of resilient bladder support means mounted within said walker assembly for cushioning and stabilizing said limb or joint.

32. A leg walker as defined in claim 30 wherein entire exterior surface of said soft support means is covered with a hook-receivable securing material.

33. A leg walker as defined in claim 30 wherein said soft support means is approximately 3/8 thick.

34. A leg walker as defined in claim 31 wherein said resilient bladder support means are constructed of an elastic material with a urethane laminate.

35. A leg walker as defined in claim 31 wherein said bladder support means are located on the inside surface of said ankle bootie, juxtaposed to the injured limb or joint.

36. A leg walker as defined in claim 31 wherein said bladder support means include a hook and loop type fabric means for securing and properly aligning said bladder support member to said inside surface of said ankle bootie.

37. A leg walker as defined in claim 35 wherein said bladder support means include at least two inflatable chambers separated by a seam to prevent inflation pressure along the sole and heel of the foot.

38. A leg walker as defined in claim 32 wherein said fastening members include a fine hook material means for securely attaching to said hook receivable securing material covering said soft support means.

39. A leg walker as defined in claim 31 wherein said bladder support means comprises:

three layers of plastic welded to form one unit consisting of a first separate chamber and a second separate chamber;

said first chamber lies adjacent to the patient'"'"'s skin and receives hot or cold fluids for therapy;

said first chamber having an upper one-way entrance port;

said first chamber having a lower exit valve allowing for said fluids to drain out of said first chamber;

said exit valve having a drain clamp;

said second chamber being air inflatable;

means for supplying said fluids into said first chamber and for draining said fluids from said first chamber.

40. A leg walker as defined in claim 39 wherein said fluid is received through said entrance port and drained at the bottom of said second chamber via said exit valve upon loosening said drain clamp.

41. A leg walker as defined in claim 39 wherein said second chamber houses an elongated foam member for providing the patient with additional cushioning when said first chamber is not inflated.

42. A prefabricated orthopedic leg walker for treatment of ankle and foot injuries and fractures of the tibia and fibula comprising:

a full-length sole consisting of upper and lower sole plates and substantially vertical webs permanently mounting and securing said plates together, and forming a plurality of box structures;

said sole being formed of a rigid and lightweight material;

said vertical webs interconnecting and permanently securing said upper and lower sole plates together;

a pair or rigid, or semi-rigid parallel strut members extending upward from said sole;

a durable and resilient soft, padded and flexible support means for extending around the injured limb or joint and for extending around the lower leg below the knee and around the ankle and foot;

means for securing said soft support to said strut members; and

means for holding said support means onto the lower leg, ankle and foot independent of the remainder of said walker, whereby said support means may be separated from the remainder of said walker when the patient is reclining.

43. A leg walker as defined in claim 42 wherein said sole is constructed of a durable and lightweight glass fiber reinforced nylon material.

44. A leg walker as defined in claim 42 wherein said sole includes a first and a second recess located on the left and right sides, respectively, of said sole.

45. A leg walker as defined in claim 44 wherein said vertical webs are absent at the heel portion of said sole, to provide a resilient cantilevered rear heel area.

46. A leg walker as defined in claim 42 wherein said upper and lower plates along with said vertical webs separate said upper and lower plates resulting in at least four box structures.

47. A leg walker as defined in claim 42 wherein said parallel strut members are parallel and adjacent to the left and right sides of the lower leg extremities.

48. A leg walker as defined in claim 42 wherein said parallel struts each include an integrally molded slot for receiving a strap across the dorsum, or instep, used to pull the foot down against said sole.

49. A leg walker as defined in claim 42 wherein said sole includes a foot cushion insole lying between the foot and the top of said sole.

50. A leg walker as defined in claim 42 wherein said continuous upper plate is generally planar.

51. A leg walker as defined in claim 42 wherein said continuous lower plate has a continuous curvature.

52. A leg walker as defined in claim 49 wherein said foot cushion insole includes at least one elongated pouch containing a water permeable matrix impregnated with a water activatable resilient formable material.

53. A leg walker as defined in claim 52 further comprising an external port means for supplying water throughout said elongated pouch so to activate said water resilient activatable formable material.

54. A leg walker as defined in claim 52 wherein said pouch is substantially airtight.

55. A leg walker as defined in claim 42 wherein said lower plate includes a textured rubber outer sole which lies between said lower plate and the ground.

56. A leg walker as defined in claim 42 wherein said foot cushion insole is constructed of a resilient material which conforms with the shape of the sole of a foot.

57. A prefabricated orthopaedic leg walker for treatment of ankle and foot injuries and fractures of the tibia and fibula comprising:

a full-length sole consisting of upper and lower plates and means for permanently mounting and securing said plates together in a spaced-apart configuration;

a shock absorbing member located at heel portion of said sole, said member including a cantilevered springy rear extended portion of said lower sole plate;

a durable and resilient soft support for extending around the injured limb or joint and for extending from just below the knee around the lower leg and foot;

means for securing said soft support to said sole; and

said cantilevered rear portion of said sole including a resilient insert received between said upper and lower sole plates.

58. A leg walker as defined in claim 57 wherein said resilient insert is constructed of a foam material.

59. A leg walker as defined in claim 57 wherein said resilient insert is constructed of a gel material.

60. A leg walker as defined in claim 57 said sole is constructed from a glass reinforced nylon fiber material.

61. A leg walker as defined in claim 57 wherein said rear extended portion of said lower sole plate is less rigid than said upper sole plate.

62. A leg walker as defined in claim 57 wherein the distance between the rear ends of said upper and said lower sole plates is approximately 3/8 inches.

63. A leg walker as defined in claim 57 wherein said cantileverd springy rear extended portion extends a distance approximately 2 inches from said heel area of the said sole portion toward the front of said sole portion and has a width of approximately 4 to 5 inches.

64. A prefabricated orthopaedic leg walker for treatment of ankle and foot injuries and fractures of the tibia and fibula comprising:

a full-length sole consisting of upper and lower sole plates and substantially vertical webs separating said plates forming a plurality of closed box structures;

said vertical webs interconnecting and permanently securing said upper and lower sole plates together;

a shock absorbing member located at heel portion of said sole, said member including a cantilevered springy rear extended portion of said lower sole plate;

a pair of rigid, parallel strut base members vertically extending above the ankle;

said rigid strut base members being molded to opposite sides of said sole;

a pair of rigid, parallel struts affixed to said strut base members, vertically extending to just below the knee;

a durable and resilient soft padded and flexible support means for extending around the injured limb or join and for extending below the knee and around the lower leg and foot extremities; and

a plurality of fastening members for securing said soft support to said struts and said sole.

65. A leg walker as defined in claim 64 wherein said first and second vertical strut members are slightly flexible at the top to accommodate a wide range of leg sizes.

66. A leg walker as defined in claim 64 wherein said first and second vertical strut members are cantilever beams subjected to flexure and torsion loads.

67. A leg walker as defined in claim 64 wherein said first and second vertical strut members are constructed from a glass fiber reinforced nylon material.

68. A leg walker as defined in claim 64 wherein said first and second vertical strut members upwardly extend a distance approximately equal to where the lower most area of the popliteal space lies.

69. A leg walker as defined in claim 64 wherein said first and second vertical struts are securely affixed to said first and second vertical and rigid strut bases, respectively, with a long-lasting, heavy duty adhesive.

70. A leg walker as defined in claim 64 wherein said fastening members comprises:

a plurality of strap means for connection between aligned points on said strut members to secure said strut members to the calf of the patient.

71. An orthopaedic device comprising:

outer support means for limiting the movement of a limb, joint or other portion of the anatomy;

an inner inflatable bladder mounted within said support means for engaging the skin of the patient and for providing additional support;

said bladder being formed of a laminate, having an outer surface of a thin, smooth, stretchable knit fabric for engaging the skin of the patient, and an inner thin plastic film bonded by an adhesive to said fabric; and

said outer support means including a full length sole, and a pair of rigid or semi-rigid strut members extending substantially vertically and upwardly from said sole to just below the knee, for preventing significant movement of the ankle of the user.

72. An orthopaedic device as defined in claim 71 wherein said bladder support means is inflated by supplying air into an inlet valve.

73. An orthopaedic device as defined in claim 71 wherein said bladder support means comprises:

three layers of plastic welded to form one unit consisting of a first separate chamber and a second separate chamber;

said first chamber lies adjacent to the patient'"'"'s skin and receives hot or cold fluids for therapy;

said first chamber having an upper one-way entrance port;

said first chamber having a lower exit valve allowing for said fluids to drain out of said first chamber;

said exit valve having a drain clamp;

said second chamber being air inflatable;

means for supplying said fluids into said first chamber and for drawing said fluids from said first chamber.

74. An orthopaedic device as defined in claim 73 wherein said fluid is received through said entrance port and drained at the bottom of said second chamber via said exit valve upon loosening said drain clamp.

75. An orthopaedic device as defined in claim 73 wherein said second chamber houses an elongated foam member for providing the patient with additional cushioning when said first chamber is not inflated.

76. A prefabricated orthopaedic leg walker for treatment of ankle and foot injuries and fractures of the tibia and fibula comprising:

a full-length sole;

a pair of rigid, or semi-rigid, substantially parallel strut members extending upwardly from said sole;

a durable and resilient adjustable soft padded and flexible support for extending around the injured limb or joint and for extending below the knee and around the lower leg and foot;

a plurality of fastening members for securing said soft support to said struts and said sole;

bladder means for cushioning, stabilizing and further supporting said limb or joint; and

means for mounting said bladder support means within said soft support.

77. A leg walker as defined in claim 76 wherein said bladder support means is inflated by supplying air into an inlet valve leading into said bladder support means.

78. A leg walker as defined in claim 76 wherein said bladder support means comprises:

three layers of plastic welded to form one unit consisting of a first separate chamber and a second separate chamber;

said first chamber lies adjacent to the patient'"'"'s skin and receives hot or cold fluids for therapy;

said first chamber having an upper one-way entrance port;

said first chamber having a lower exit valve allowing for said fluids to drain out of said first chamber;

said exit valve having a drain clamp;

said second chamber being air inflatable;

means for supplying said fluids into said first chamber and for drawing said fluids from said first chamber.

79. A leg walker as defined in claim 78 wherein said fluid is received through said entrance port and drained at the bottom of said second chamber via said exit valve upon loosening said drain clamp.

80. A leg walker as defined in claim 78 wherein said second chamber houses an elongated foam member for providing the patient with additional cushioning when said first chamber is not inflated.

81. A leg walker as defined in claim 76 wherein said bladder is formed of a laminate, having an outer surface of a thin, smooth, stretchable knit fabric, and an inner thin film bonded by an adhesive to said fabric.

82. A leg walker as defined in claim 76 wherein the outer surface of said soft goods-type support is covered with a fine hook receivable securing material.

83. A leg walker as defined in claim 82 wherein the outer surface of said bladder support means are adequately covered with fine hook securing fabric for mounting said bladder support means within said soft goods-type support.

84. A prefabricated orthopaedic leg walker for treatment of ankle and foot injuries and fractures of the tibia and fibual comprising:

a full-length sole;

a pair of rigid, parallel strut base members extending upwardly from said sole;

resilient flexible support means for extending around the injured ankle or foot;

means for mounting said support means within said struts and said sole;

a plurality of substantially inflexible splinting members; and

means for mounting said splinting members directly to said flexible support means independently of said struts to form a separate sub-assembly including said flexible support means with said splinting members attached thereto which sub-assembly may be separated from the remainder of said walker;

whereby said flexible support means may be used separately from said struts and sole, with said splinting members providing limited motion restraint.

85. A leg walker as defined in claim 84 wherein each said splinting member arrangement comprises:

an upper vertical splinting member;

a lower horizontal splinting member;

a hinge member for securing said upper vertical and lower horizontal splinting members; and

means for securing upper and lower splinting members to the side of said flexible support means.

86. A leg walker as defined in claim 85 wherein said upper vertical splinting member and said lower horizontal splinting members are housed in separate pouches, the back sides of which are covered with securing means of fine hook and loop-type material.

87. A leg walker as defined in claim 86 wherein said pouches are constructed of vinyl material.

88. A leg walker as defined in claim 84, wherein said resilient flexible support means is secured directly to said struts.

89. A leg walker as defined in claim 84 wherein said resilient flexible support means is a bootie;

and wherein an additional soft goods-type support is provided, said soft goods-type support being directly secured to said struts and enclosing said bootie.

90. A prefabricated orthopaedic leg walker assembly for treatment of ankle and foot injuries and fractures of the tibia and fibula, comprising:

a rigid, full-length sole;

said sole having an upper sole plate and a lower sole plate;

said upper and lower sole plates being separated and permanently secured together by vertical integral webs, forming a plurality of closed box structures;

the top of said upper sole plate being covered with cushioning material;

the bottom of said lower sole plate having a substantial curvature;

said bottom of said lower sole plate being covered with a durable gripping material;

a raised strip member mounted on said sole at the heel of a patient;

the rear of said upper sole plate and the rear of said lower sole plate forming a cantilevered springy shock absorbing member;

a pair of rigid parallel strut base members vertically extending from said sole to just above the ankle;

said strut base members being integrally molded to opposite sides of said sole;

a pair of rigid parallel struts affixed to said strut base members, vertically extending along the sides of the lower leg to just below the knee;

said struts, strut bases and sole being constructed of high strength plastic material;

a durable and resilient foam fabric soft support for extending around the entire injured limb or joint and for extending below the knee for bracing and stabilizing the lower leg, ankle and foot;

said soft support having a resilient tongue member;

means for securing said soft support around the entire injured limb or joint; and

a plurality of fastening members for securing said soft goods-type support to said struts and said sole.

91. A prefabricated orthopaedic leg walker for treatment of ankle and foot injuries and fractures of the tibia and fibula comprising:

a full-length sole;

a pair or rigid, or semi-rigid, substantially parallel strut members extending upwardly from said sole;

a durable and resilient adjustable soft padded and flexible support for extending around the injured limb or joint and for extending below the knee and around the lower leg and foot;

a plurality of fastening members for securing said soft support to said struts and said sole;

bladder means for cushioning, stabilizing and further supporting said limb or joint; and

means for mounting said bladder support means within said walker to supplement the function of said soft support.