Surgery – Truss – Pad
Patent
1975-01-17
1976-09-07
Van Balen, William J.
Surgery
Truss
Pad
128132D, 128268, 260 25AZ, 260 25AD, 260 25BD, 264321, 428311, 428315, 428305, 428338, 428425, A61L 1500, B32B 326
Patent
active
039788555
ABSTRACT:
The invention is directed to an open celled polyurethane foam article, which initially is generally non-absorbent, the surface of which is subsequently rendered absorbent by decreasing the average pore cell size to a critical range while preferably also simultaneously or subsequently achieving a critical range of a wetting agent in such surface. This can be accomplished in either of two ways. The first method is to permanently collapse the cells in the surface region of the original foam so that the concentration of any residual wetting agents initially present in the structure increases in the compressed surface region, thus rendering said surface more readily absorbent. For a surgical dressing, the surface cells should be permanently but only partially collapsed to substantially less than the original size to form a microporous skin. According to the second method substantially all residual wetting agents which may be present in the original foam material are extracted from the polyurethane either before or after forming the microporous skin surface. Preferably, the extraction comes after formation of the skin so that a controlled amount of a desired wetting agent(s) can then be reapplied to the microporous surface for better controlling absorbency into the structure. As the invention relates primarily to surgical dressings, a critical range for the amount of wetting agent(s) and the average cell pore size in the collapsed surface have been found which are related to the wicking, absorbency rate, and non-adherence characteristics of the resulting structure. These characteristics in turn are directly related to critical and measurable differences in the rate of epithelization, wound healing performance and wound healing quality.
REFERENCES:
patent: 3499811 (1970-03-01), Clarke
patent: 3524755 (1970-08-01), Hochberg
patent: 3816233 (1974-06-01), Powers
patent: 3849238 (1974-11-01), Gould et al.
McRae Wayne A.
Reed Philip B.
Ionics Lyo Products Company
Saliba Norman E.
Van Balen William J.
LandOfFree
Polyurethane foam surgical dressing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyurethane foam surgical dressing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyurethane foam surgical dressing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2167677