Negative Pressure Tissue Debridement Devices, Systems, And Methods

Abstract

In some embodiments, a debridement tool may include a housing, a reduced-pressure lumen, a debridement head, an impeller, and a drive system. The debridement head may be moveable relative to the housing. The impeller may be positioned in fluid communication with the reduced-pressure lumen and be moveable relative to the housing by operation of reduced pressure being applied to the impeller. The drive system may be coupled between the impeller and the debridement head and be configured to impart movement from the impeller to the debridement head.

What is claimed is: 
     
         1 . A debridement tool for debriding tissue from a tissue site, comprising:
 a housing comprising an interior space;   a reduced-pressure lumen adapted to communicate reduced pressure;   a debridement head moveable relative to the housing;   an impeller moveable relative to the housing and positioned in fluid communication with the reduced-pressure lumen; and   a drive system coupled between the impeller and the debridement head, the drive system being configured to impart movement from the impeller to the debridement head.   
     
     
         2 . The debridement tool of  claim 1 , further comprising a working surface adapted to face the tissue site, and a working surface port disposed through the working surface. 
     
     
         3 . The debridement tool of  claim 2 , wherein the working surface is in fluid communication with the interior space through the working surface port. 
     
     
         4 . The debridement tool of  claim 2 , wherein the reduced-pressure lumen is in fluid communication with the working surface through the working surface port. 
     
     
         5 . The debridement tool of  claim 1 , wherein the reduced-pressure lumen is in fluid communication with the interior space. 
     
     
         6 . The debridement tool of  claim 1 , further comprising a handle coupled to the housing, wherein the reduced-pressure lumen is in fluid communication with the interior space through the handle. 
     
     
         7 . The debridement tool of  claim 1 , further comprising a feedback pressure lumen adapted to communicate reduced pressure and being positioned in fluid communication with the interior space. 
     
     
         8 . The debridement tool of  claim 7 , further comprising a handle coupled to the housing, wherein the feedback pressure lumen is in fluid communication with the interior space through the handle. 
     
     
         9 . The debridement tool of  claim 1 , wherein the debridement head comprises a debridement head axis and an exterior surface rotatable about the debridement head axis, the exterior surface of the debridement head comprising an abrasive portion. 
     
     
         10 . The debridement tool of  claim 9 , wherein the exterior surface of the debridement head is cylindrical. 
     
     
         11 . The debridement tool of  claim 9 , wherein the exterior surface of the debridement head further comprises a non-abrasive portion. 
     
     
         12 . The debridement tool of  claim 9 , wherein the abrasive portion is a plurality of abrasive portions, the exterior surface of the debridement head further comprising a plurality of non-abrasive portions, the abrasive portions being positioned between the non-abrasive portions about the exterior surface of the debridement head. 
     
     
         13 . The debridement tool of  claim 9 , wherein the abrasive portion is selected from a group consisting of: a coating of grit; protruding bristles; and protruding wires. 
     
     
         14 . The debridement tool of  claim 9 , wherein the abrasive portion comprises at least one cutting tooth. 
     
     
         15 . The debridement tool of  claim 9 , wherein the housing further comprises a working surface adapted to face the tissue site, and a working surface port disposed through the working surface, at least a portion of the exterior surface of the debridement head being adapted to protrude through the working surface port. 
     
     
         16 . The debridement tool of  claim 15 , wherein the exterior surface of the debridement head is adapted to protrude through the working surface port and beyond the working surface between about 0.5 millimeters to about 2.0 millimeters. 
     
     
         17 . The debridement tool of  claim 1 , wherein the debridement head is positioned within the interior space. 
     
     
         18 . The debridement tool of  claim 1 , wherein the impeller comprises an impeller axis and a plurality of impeller vanes rotatable about the impeller axis. 
     
     
         19 . The debridement tool of  claim 18 , wherein the impeller is adapted to rotate by operation of reduced pressure being applied to the impeller vanes. 
     
     
         20 . The debridement tool of  claim 1 , wherein the impeller is positioned in fluid communication with the interior space. 
     
     
         21 . The debridement tool of  claim 1 , wherein the impeller is positioned within the interior space. 
     
     
         22 . The debridement tool of  claim 1 , wherein the drive system comprises an impeller pulley, a debridement head pulley, and a drive belt, the impeller pulley being coupled to the impeller and moveable with the impeller, the debridement head pulley being coupled to the debridement head and moveable with the debridement head, the drive belt being positioned about the impeller pulley and the debridement head pulley. 
     
     
         23 . A debridement tool for debriding tissue from a tissue site, comprising:
 a housing comprising an interior space and a working surface, the working surface being adapted to face the tissue site, and a working surface port being disposed through the working surface;   a reduced-pressure lumen in fluid communication with the working surface through the working surface port;   a debridement head moveable relative to the housing;   an impeller moveable relative to the housing and positioned in fluid communication with the reduced-pressure lumen; and   a drive system coupled between the impeller and the debridement head, the drive system being configured to impart movement from the impeller to the debridement head.   
     
     
         24 . The debridement tool of  claim 23 , wherein the working surface is in fluid communication with the interior space through the working surface port. 
     
     
         25 . The debridement tool of  claim 23 , wherein the reduced-pressure lumen is in fluid communication with the interior space. 
     
     
         26 . The debridement tool of  claim 23 , further comprising a handle coupled to the housing, wherein the reduced-pressure lumen is in fluid communication with the interior space through the handle. 
     
     
         27 . The debridement tool of  claim 23 , further comprising a feedback pressure lumen adapted to communicate reduced pressure and being positioned in fluid communication with the interior space. 
     
     
         28 . The debridement tool of  claim 23 , wherein the debridement head comprises a debridement head axis and an exterior surface rotatable about the debridement head axis, the exterior surface of the debridement head comprising an abrasive portion. 
     
     
         29 . The debridement tool of  claim 28 , wherein the abrasive portion is a plurality of abrasive portions, the exterior surface of the debridement head further comprising a plurality of non-abrasive portions, the abrasive portions being positioned between the non-abrasive portions about the exterior surface of the debridement head. 
     
     
         30 . The debridement tool of  claim 28 , wherein the abrasive portion is selected from a group consisting of: a coating of grit; protruding bristles; protruding wires; and at least one cutting tooth. 
     
     
         31 . The debridement tool of  claim 28 , wherein at least a portion of the exterior surface of the debridement head is adapted to protrude through the working surface port. 
     
     
         32 . The debridement tool of  claim 23 , wherein the debridement head is positioned within the interior space. 
     
     
         33 . The debridement tool of  claim 23 , wherein the impeller comprises an impeller axis and a plurality of impeller vanes rotatable about the impeller axis. 
     
     
         34 . The debridement tool of  claim 33 , wherein the impeller is adapted to rotate by operation of reduced pressure being applied to the impeller vanes. 
     
     
         35 . The debridement tool of  claim 23 , wherein the impeller is positioned in fluid communication with the interior space. 
     
     
         36 . The debridement tool of  claim 23 , wherein the impeller is positioned within the interior space. 
     
     
         37 . The debridement tool of  claim 23 , wherein the drive system comprises an impeller pulley, a debridement head pulley, and a drive belt, the impeller pulley being coupled to the impeller and moveable with the impeller, the debridement head pulley being coupled to the debridement head and moveable with the debridement head, the drive belt being positioned about the impeller pulley and the debridement head pulley. 
     
     
         38 . A debridement tool for debriding tissue from a tissue site, comprising:
 a housing comprising an interior space and a working surface, the working surface adapted to face a tissue site and having a working surface port disposed through the working surface, the working surface being in fluid communication with the interior space through the working surface port;   a handle coupled to the housing;   a reduced-pressure lumen in fluid communication with the working surface port, the reduced-pressure lumen being adapted to communicate reduced pressure, the reduced-pressure lumen being in fluid communication with the interior space through the handle;   a feedback pressure lumen in fluid communication with the interior space, the feedback pressure lumen being adapted to communicate reduced pressure, the feedback pressure lumen being in fluid communication with the interior space through the handle;   a debridement head moveable relative to the housing, the debridement head having an exterior surface rotatable about a debridement head axis, the exterior surface of the debridement head comprising an abrasive portion, the debridement head being positioned within the interior space and at least a portion of the exterior surface of the debridement head being adapted to protrude through the working surface port;   an impeller moveable relative to the housing and positioned in fluid communication with the reduced-pressure lumen, the impeller comprising a plurality of impeller vanes rotatable about an impeller axis, the impeller adapted to rotate by operation of reduced pressure being applied to the impeller vanes, the impeller being positioned in fluid communication with the interior space; and   a drive system coupled between the impeller and the debridement head, the drive system comprising an impeller pulley, a debridement head pulley, and a drive belt, the impeller pulley coupled to the impeller and rotatable about the impeller axis, the debridement head pulley coupled to the debridement head and rotatable about the debridement head axis, the drive belt being positioned about the impeller pulley and the debridement head pulley, the drive system being configured to impart movement from the impeller to the debridement head.   
     
     
         39 . A method for debriding tissue at a tissue site, comprising:
 providing a debridement tool, comprising:
 a housing comprising a working surface, 
 a debridement head moveable relative to the working surface, 
 an impeller, and 
 a drive system coupled between the impeller and the debridement head; 
   communicating reduced pressure to the working surface;   communicating reduced pressure to the impeller, the impeller configured to rotate by operation of reduced pressure being applied thereto;   moving the debridement head relative to the working surface with the drive system, the drive system being operable to impart movement from the impeller to the debridement head; and   positioning the debridement head in contact with the tissue site.   
     
     
         40 . The method of  claim 39 , further comprising dislodging necrotic tissue from the tissue site by moving the debridement head relative to the tissue site when the debridement head is in contact with the tissue site and reduced pressure is being communicated to the impeller. 
     
     
         41 . The method of  claim 40 , further comprising removing dislodged necrotic tissue from the tissue site by operation of reduced pressure being communicated to the working surface. 
     
     
         42 . The method of  claim 40 , further comprising communicating dislodged necrotic tissue into a canister for disposal by operation of the reduced pressure being communicated to the working surface. 
     
     
         43 . The method of  claim 39 , wherein the housing further comprises an interior space and a working surface port disposed through the working surface in fluid communication with the interior space, the method further comprising comparing a reduced pressure output being communicated to the working surface with a feedback reduced pressure measured within the interior space of the housing, wherein the reduced pressure is communicated to the working surface and the tissue site through the working surface port. 
     
     
         44 . The method of  claim 43 , further comprising signaling a debridement tubing blockage alarm if the reduced pressure output is at a maximum reduced pressure and the feedback reduced pressure is substantially zero. 
     
     
         45 . The method of  claim 44 , wherein the maximum reduced pressure is between about −300 mm Hg to about −400 mm Hg. 
     
     
         46 . The method of  claim 43 , further comprising signaling a partial head blockage alarm if the feedback reduced pressure is between about −5 mm Hg to about −100 mm Hg. 
     
     
         47 . The method of  claim 43 , further comprising:
 increasing the reduced pressure output to a maximum reduced pressure for a set time period if the feedback reduced pressure is greater than −100 mmHg;   signaling a full head blockage alarm if the feedback reduced pressure is greater than −100 mm Hg after the set time period; and   shutting off the reduced pressure output if the feedback reduced pressure is greater than −100 mmHg after the set time period.