Dressing device for use wtih a cannula or a catheter

Abstract

A wound dressing device for use with a transcutaneous medical device such as a cannula or a catheter comprises a polyurethane matrix which may be covered with a film backing. Chlorhexidine di- gluconate and a polyanhydroglucuronic salt are contained in the polymer matrix. The wound dressing device prevents microbial colonization of the dressing and stops bleeding from the insertion site. The device provides combined haemostatic and antimicrobial effects at the insertion site but without adversely affecting wound healing.

1 . A dressing device for use with a transcutaneous medical device such as a cannula or a catheter, the dressing device comprising a flexible hydrophillic polyurethane matrix, an antimicrobial agent contained within the matrix, and a haemostatic agent contained within the matrix, the haemostatic agent comprising polyanhydroglucuronic acid or salt thereof in an amount to achieve a haemostatic effect, and the antimicrobial agent comprising chlorhexidine di-gluconate in an amount to achieve an antimicrobial effect without adversely affecting wound healing. 
     
     
         2 . The dressing device as claimed in  claim 1  wherein the polyanhydroglucuronic salt is present in an amount of from 3% to 20% (w/w). 
     
     
         3 . The dressing device as claimed in  claim 1  wherein the polyanhydroglucuronic salt is present in an amount of approximately 8% (w/w). 
     
     
         4 . The dressing device as claimed in  claim 1  wherein the chlorhexidine di-gluconate is present in an amount of from 9% to 16% (w/w). 
     
     
         5 . The dressing device as claimed in  claim 1  wherein the chlorhexidine di-gluconate is present in an amount of approximately 11% (w/w). 
     
     
         6 . The dressing device as claimed  claim 1  any comprising approximately 8% (w/w) polyanhydroglucoronic acid, approximately 11% (w/w) chlorhexidine di-gluconate, and approximately 81% hydrophillic flexible polyurethane foam. 
     
     
         7 . The dressing device as claimed in  claim 1  comprising an aperture for reception of a medical device such as a cannula or a catheter. 
     
     
         8 . The dressing device as claimed in  claim 1  comprising a breathable backing material to allow vapour transmission from the device. 
     
     
         9 . The dressing as claimed in  claim 1  wherein a skin contacting side of the device contains an adhesive to retain the device affixed to a site. 
     
     
         10 . The wound dressing device as claimed in  claim 7  wherein the central access aperture is a circular hole ranging in size from 0.1 mm to 10 mm in diameter 
     
     
         11 . The wound dressing device as claimed in  claim 7  wherein the central access aperture is “x” shaped 
     
     
         12 . The wound dressing device as claimed in  claim 7  wherein the central access aperture is “T” shaped. 
     
     
         13 . The wound dressing device as claimed in  claim 1  wherein the device contains a quantity of the antimicrobial agent to maintain antimicrobial efficiency for up to 7 days. 
     
     
         14 . The use of a wound dressing as claimed in  claim 1  in conjunction with a transcutaneous medical device such as a cannula or a catheter.