Pneumatic ankle brace with bladder and pump arrangement

• US 5,348,530 A
• Filed: 07/29/1993
• Issued: 09/20/1994
• Est. Priority Date: 07/29/1993
• Status: Expired due to Term

• Current Assignee: Ossur hf
• Original Assignee: Royce Medical Company (Ossur hf)
• Inventors: Grim, Tracy E., Iglesias, Joseph M., Arnold, William K.
• Primary Examiner(s): Hafer, Robert A.
• Assistant Examiner(s): RIMELL, SAMUEL G
• Application Number:
  US08/099,190
• Time in Patent Office: 418 Days
• Field of Search: 602/5, 602/6, 602/12, 602/13, 602/23, 602/27, 602/28, 602/24, 604/26, 604/28, 604/29, 604/32
• US Class Current: 602/13
• CPC Class Codes: A61F 5/0111 for the feet or ankles
• CPC Class Codes: A61F 5/012 inflatable

Abstract

A pneumatic ankle brace having a pair of relatively rigid side supports with inflatable main bladders attached to their inside surfaces. The inflatable main bladders are coupled to an interconnected foot pump. Additional support and back-up bladders may be placed distally upon the main bladders to provide further cushioning and support. The foot pump is activated through normal use, such as walking or running, whereby entrapped fluid is displaced back and forth between the main bladders and the pump. This creates a pulsing action which provides a massaging compression effect which helps reduce swelling and increase venous and lymphatic return.

Claims

1. A pneumatic ankle brace, comprising:

first and second substantially rigid side supports configured for fitting about the lower leg of a user and for supporting both sides of the user'"'"'s ankle;

securing means for securing said side supports relative to the user to firmly encase the ankle; and

a bladder-pump assembly including a first bladder, a second bladder, a resilient foot pump, first channel means for providing fluid communication back-and-forth between said first bladder and said foot pump, and second channel means for providing fluid communication back-and-forth between said second bladder and said foot pump, said first bladder being positioned to provide a cushion between one side of the ankle and said first side support, said second bladder being positioned to provide a cushion between the other side of the ankle and said second side support, said bladders at least in part supporting the user'"'"'s foot and ankle against inversion and eversion, said bladder-pump assembly having a preinflated constant fluid volume during operation of said ankle brace, said foot pump being positioned under the foot and thereby subject to foot pressure during the user'"'"'s foot impact activity;

wherein said foot pump when subjected to repeated foot pressure and release thereof causes a pulsing action of fluid in said bladder-pump assembly back-and-forth between said first bladder and said pump through said first channel means and back-and-forth between said second bladder and said pump through said second channel means, the fluid pulsing action providing a massaging compression effect to the foot and the ankle to reduce swelling thereof.

2. The brace of claim 1 wherein said side supports are formed of a relatively stiff or rigid material and are limited to the sides of the lower leg, ankle, and heel of the user.

3. The brace of claim 1 further comprising one-way inlet valve means for supply fluid to said first and second bladders, and relief means for releasing fluid from said bladders over a predetermined period of time.

4. The brace of claim 1 further comprising lower ends of said side supports being insertable into sides of a shoe having laces, and fastening means on said side supports for receiving the laces of the shoe so that the laces can be tightened and tied to restrain movement of the ankle.

5. The brace of claim 1 further comprising additional bladders mounted distally upon said first and second bladders, said additional bladders having a certain amount of preinflation.

6. The brace of claim 1 further comprising a fabric laminated to said first and second bladders, adjacent to the lower leg extremity, to provide comfort to and to allow the skin of the user'"'"'s lower leg extremity to breathe.

7. The brace of claim 1 wherein said foot pump is positionable under the user'"'"'s heel and includes welded darts to reduce the thickness thereof in selected areas to increase the comfort of said ankle brace to the user.

8. The brace of claim 1 wherein said pump and said first and second bladders are formed as a single construction which includes integral means for regulating fluid flow between said pump and said bladders.

9. A method for immobilizing an ankle of an individual against inversion and eversion and to reduce swelling in the individual'"'"'s lower leg extremity, said method comprising the steps of:

securing a pair of substantially rigid side supports to encase the individual'"'"'s ankle with a first bladder disposed between one side support and one ankle side and a second bladder disposed between the other side support and the other ankle side;

positioning a resilient foot pump, which is in fluid communication with both the first and second bladders, underneath the individual'"'"'s foot; and

applying sequential pressure and at least partial release thereof to the resilient foot pump and through and by movement of the foot relative to a support surface;

wherein said applying step moves fluid back-and-forth between the resilient foot pump and the first bladder and between the resilient foot pump and the second bladder, the fluid back-and-forth movements creating a pulsing action which has a massaging compression effect that reduces swelling of the individual'"'"'s lower leg extremity.

10. The method of claim 9 further comprising placing cushioning and support bladders distally upon the first and second bladders.

11. The method of claim 9 wherein the bladders and the pump at least in part define a bladder-and-pump assembly, and during said applying step, the amount of fluid in the bladder-and-pump assembly remaining constant.

12. The method of claim 9 wherein said applying step includes the individual running or walking on that foot on the support surface.

13. The method of claim 9 further comprising, before said applying step, inserting the side supports, the first bladder, the second bladder and the foot pump, together with the individual'"'"'s foot into a shoe which has laces, and thereafter, tightening the laces to restrain movement of the ankle.

14. The method of claim 13 wherein said inserting step includes (1) inserting lower ends of the side supports into the sides of the shoe, and said tightening step includes passing the laces through fasteners in the side supports.

15. The method of claim 9 further comprising supplying fluid to the bladders through at least one bladder inlet valve, and after said supplying step, releasing fluid from the bladders through at least one bladder relief valve.

16. The method of claim 9 wherein said pump positioning step includes positioning the resilient foot pump under the individual'"'"'s heel, and wherein said fluid moving step includes increasing venous and lymphatic return in the individual'"'"'s lower leg.

17. The method of claim 9 wherein said securing step includes (1) securely attaching the side supports around the lower leg and ankle just below the calf area using at least one length-adjustable strap and (2) extending a counter strap between the side supports and just above the individual'"'"'s heel;

wherein the side supports, bladders and foot pump together define an ankle brace; and

further comprising lace fastening the ankle brace to and inside of a shoe.

18. The method of claim 9 wherein the bladders and the pump together define an assembly, and said securing step includes attaching the assembly to the side supports, the side supports and the assembly together defining an ankle brace, fitting the brace around the foot using adjustable straps, fitting a shoe having laces over the brace, using the shoe laces to fasten the ankle brace in position, and inflating the assembly to a desired pressure.