Inflatable prosthesis liner

• US 5,387,245 A
• Filed: 03/30/1993
• Issued: 02/07/1995
• Est. Priority Date: 12/23/1991
• Status: Expired due to Fees

• Current Assignee: Cheryl A. Fay, John N. Fay
• Original Assignee: Cheryl A. Fay, John N. Fay
• Inventors: Fay, Cheryl A., Fay, John N.
• Primary Examiner(s): Willse, David H.
• Application Number:
  US08/040,237
• Time in Patent Office: 679 Days
• Field of Search: 623/33-37, 623/901, 264/222, 264/DIG. 30, 156/275.3, 156/308.4
• US Class Current: 623/37
• CPC Class Codes: A61F 2/5046 for designing or making customized prostheses, e.g. using templates, finite-element analysis or CAD-CAM techniques
• CPC Class Codes: A61F 2/7843 Inflatable bladders
• CPC Class Codes: A61F 2/80 Sockets, e.g. of suction type
• CPC Class Codes: A61F 2002/501 having an inflatable pocket filled with fluid, i.e. liquid or gas
• CPC Class Codes: A61F 2002/7806 using adhesive means for connecting prosthetic parts A61F2002/30448
• CPC Class Codes: A61F 2002/7818 Stockings or socks for the limb stump cosmetic coverings A61F2002/5001
• CPC Class Codes: Y10S 623/901 Method of manufacturing prosthetic device

Abstract

A liner that covers an amputation stump and which cushions the stump when it is placed into a prosthesis socket includes selectively inflatable bladders foe customizing the liner to fit individual patients. The liner is made of two liner parts, one being an inner liner and the other being an outer liner. The inner liner is placed onto the amputation stump and a prosthetist determines the region or regions where bladders are needed to provide a comfortable fit. The region or regions are outlined with an adhesive and the outer liner is then brought into overlying relation to the inner liner so that the two liner parts adhere to one another along the outlined regions. Upon inflation, the inner liner conforms to the shape of the amputation stump to provide enhanced cushioning and the outer liner conforms to the shape of the interior wall of the socket and the patient receives a custom fit from a simple appliance. An annular bladder at the proximal rim of the socket creates a substantially perfect seal to maintain the suction within the socket.

Claims

1. A method for cushioning the contact between a prosthesis socket and an amputation stump received therewithin, comprising the steps of:

first placing a flexible, elastomeric inner liner in overlying relation to the amputation stump;

next delineating at least one region on said inner liner where a bladder is required;

next circumscribing said delineated region with an application of adhesive that has a narrow width with respect to its extent;

next placing a flexible, elastomeric outer liner into overlying relation to said inner liner so that said adhesive is positioned between said inner and outer liners and bonds them together along the extent of said adhesive when it dries, thereby forming a bladder bounded by said adhesive; and

next placing a valve means in fluid communication with said bladder so that air can be selectively added to the bladder and withdrawn therefrom.

2. The method of claim 1, further comprising the steps of rolling said inner liner inside out preparatory to positioning it on said amputation stump and positioning it in overlying relation to said stump by unrolling it thereonto.

3. The method of claim 1, further comprising the steps of rolling .said outer liner inside out preparatory to positioning it in overlying relation to said inner liner and positioning it in overlying relation to said inner liner by unrolling it thereonto.

4. The method of claim 1, further comprising the step of injecting a lubricant between said inner and outer liners in preselected areas not adhered to one another to thereby reduce friction between said liners and to reduce friction applied to the patient'"'"'s skin.