Negative pressure wound treatment system and method

Abstract

A negative pressure wound treatment system comprising a bandage portion and a negative pressure portion. The bandage portion includes a dressing portion in contact with a wound and a sealing layer positioned in contact with the dressing portion. The sealing layer includes an adhesive creating a seal around the wound. The negative pressure portion is in fluid communication with the bandage portion and includes a first valve and a second valve. The first valve is in fluid communication with the bandage portion and the negative pressure portion. The second valve is in fluid communication with the negative pressure portion and the surrounding environment. The negative pressure wound treatment system is configured to provide negative pressure to an area sealed by the bandage portion upon the actuation of the negative pressure portion. The negative pressure portion is configured to be actuated by compressing the negative pressure portion while walking.

I/We claim: 
     
         1 . A wound treatment device comprising:
 a first chamber configured to sealingly engage a portion of a subject;   a second chamber fluidly coupled to the first chamber;   a valve fluidly coupled to the first chamber and the second chamber;   wherein at least the second chamber forms part of an insole that is configured to be positioned within footwear, the second chamber being configured to be actuated by the subject while walking; and   wherein when the second chamber is actuated, fluid from the first chamber is directed through the valve and into the second chamber to create a negative pressure environment within the first chamber.   
     
     
         2 . The wound treatment device of  claim 1 , wherein the valve is a first valve and further comprising a second valve fluidly coupled to the second chamber and the ambient environment; and
 wherein when the second chamber is actuated, fluid from the second chamber is directed through the second valve and out into the ambient environment.   
     
     
         3 . The wound treatment device of  claim 2 , wherein the insole includes the first chamber, the first valve, and the second valve. 
     
     
         4 . The wound treatment device of  claim 3 , wherein the first chamber is configured to contact a heel of a foot of the subject; and
 wherein the second chamber is configured to contact an arch of the foot of the subject.   
     
     
         5 . The wound treatment device of  claim 1 , further comprising an adhesive configured to seal the first chamber to the portion of the subject. 
     
     
         6 . The wound treatment device of  claim 1 , further comprising a tube that is fluidly coupled to the first chamber and the second chamber. 
     
     
         7 . The wound treatment device of  claim 1 , further comprising an absorbent material positioned within the second chamber; and
 wherein liquid from the first chamber is directed through the valve, into the second chamber, and absorbed by the absorbent material.   
     
     
         8 . The wound treatment device of  claim 1 , further comprising an absorbent material positioned within the first chamber, the absorbent material being configured to absorb liquid that is within the first chamber. 
     
     
         9 . The wound treatment device of  claim 1 , wherein the portion of the subject is a bottom of a foot of the subject that includes a wound; and
 wherein when the first chamber sealingly engages the portion of the subject, the first chamber encloses the wound.   
     
     
         10 . The wound treatment device of  claim 1 , wherein the valve includes a release mechanism that is actuatable, and
 wherein when the release mechanism is actuated, the negative pressure environment created in the first chamber is removed.   
     
     
         11 . The wound treatment device of  claim 1 , further comprising a pressure sensor positioned within the first chamber. 
     
     
         12 . A wound treatment device comprising:
 a first chamber configured to sealingly engage a bottom of a foot of a subject that includes a wound so that the first chamber encloses the wound, the first chamber including an adhesive to seal the first chamber to the bottom of the foot of the subject;   a second chamber fluidly coupled to the first chamber;   a valve fluidly coupled to the first chamber and the second chamber;   wherein the first chamber and the second chamber are configured to be positioned within footwear, the second chamber being configured to be positioned below the foot of the subject and actuated by the subject while walking;   wherein when the second chamber is actuated, fluid from the first chamber is directed through the valve and into the second chamber to create a negative pressure environment within the first chamber.   
     
     
         13 . The wound treatment device of  claim 12 , further comprising an insole that includes the first chamber, the second chamber, and the valve; and
 wherein the insole is configured to be positioned within the footwear of the subject.   
     
     
         14 . The wound treatment device of  claim 12 , wherein the valve is a first valve and further comprising a second valve fluidly coupled to the second chamber and the ambient environment; and
 wherein when the second chamber is actuated, fluid from the second chamber is directed through the second valve and out into the ambient environment.   
     
     
         15 . The wound treatment device of  claim 12 , further comprising an absorbent material positioned within the second chamber; and
 wherein liquid from the wound is directed into the first chamber, through the valve, and into the second chamber, in which the liquid is absorbed by the absorbent material.   
     
     
         16 . The wound treatment device of  claim 12 , wherein the valve includes a release mechanism that is actuatable, and
 wherein when the release mechanism is actuated, the negative pressure environment created in the first chamber is removed.   
     
     
         17 . The wound treatment device of  claim 12 , further comprising a pressure sensor positioned within the first chamber. 
     
     
         18 . A method of treating a wound, the method comprising:
 positioning an insole into footwear of a subject, the insole including a first chamber, a second chamber, and a valve, the first chamber being fluidly coupled to the second chamber, and the valve being fluidly coupled to the first chamber and the second chamber;   positioning the first chamber over a wound a subject so that the first chamber encloses the wound;   positioning the second chamber below a foot of the subject that is secured by the footwear;   actuating the second chamber while walking thereby directing fluid from the first chamber, through the valve, and into the second chamber to create a negative pressure environment within the first chamber.   
     
     
         19 . The method of  claim 18 , wherein the insole includes a second valve fluidly coupled to the second chamber and the ambient environment; and
 wherein when the second chamber is actuated, fluid from the second chamber is directed through the second valve and out into the ambient environment.   
     
     
         20 . The method of  claim 18 , wherein the valve includes a release mechanism that is actuatable, and further comprising actuating the release mechanism to remove the negative pressure environment in the first chamber.