Compact package for an orthopedic cast
View Patent ↗A compact package for making an orthopedic cast is disclosed. The package comprises a fabric folded and compressed, having an initial over-all surface area, that, when saturated with water, expands to final over-all surface area that is larger by a factor greater than 50 than the initial over-all surface area. The expansion of the fabric occurs during a first time period. The package also includes a water-curable material, impregnated into the fabric, so that when the material is saturated with water, the material cures over a second period of time to become rigid, wherein the second period of time is substantially longer than the first period of time. When the package is used, the fabric impregnated with the material may be immersed in water and expanded. Once expanded and unfolded, the fabric may be placed around a portion of a body for which the orthopedic cast is desired. When the second time period elapses, the material has become rigid so as to form the orthopedic cast.
1. A compact package for making an orthopedic cast, the package comprising:
a fabric folded and compressed into a coin shape having a height of approximately 1 cm and a diameter of approximately 2 cm, having an initial over-all surface area prior to being saturated with water, that expands to final over-all surface area after saturation with water that is larger by a factor greater than 50 than the initial over-all surface area prior to water saturation in a first period of time;
a water-curable material, impregnated into the fabric prior to the fabric being folded and compressed, so that when the material is saturated with water, the material cures over a second period of time to become rigid, wherein the second period of time is substantially longer than the first period of time,
so that for use, the fabric impregnated with the material may be immersed in water and expanded, placed around a portion of a body for which the orthopedic cast is desired, and, after permitting the second period time to elapse, the material has become rigid so as to form the orthopedic cast.
2. The compact package according to claim 1 , wherein the fabric is formed from non-woven fibers.
3. The compact package according to claim 2 , wherein the non-woven fibers are viscose.
4. The compact package according to claim 1 , wherein the water-curable material is a urethane.
5. The compact package according to claim 1 , wherein the water-curable material includes polyisocyanate prepolymers.
6. The compact package according to claim 1 , wherein second time is less than five minutes.
7. A method of forming an orthopedic cast, the method comprising:
impregnating a fabric with a water-curable material;
folding and compressing the fabric containing the water-curable material until the fabric is compressed into a coin having a cylindrical shape and a size of approximately 1 cm in height by 2.0 cm in diameter and has a first surface area;
saturating with water the compressed fabric impregnated with the water-curable material;
allowing the compressed fabric to decompress over a first time period;
unfolding the compressed fabric into a sheet having a final surface area that is a factor of at least 50 times larger than that of the first surface area;
applying the sheet to an appendage of patient; and
waiting a second time period for the water-activated curable material to cure the sheet into an orthopedic cast wherein the second time period is substantially longer than the first time period.
8. A method according to claim 7 , wherein the compressed fabric is a non-woven material.
9. A method according to claim 8 , wherein the non-woven material is cotton.
10. A method according to claim 7 , wherein the compressed fabric is viscose.
11. A method according to claim 7 , wherein the water-curable material includes polyisocyanate prepolymers.
12. A method according to claim 7 , wherein the water curable materials includes polyurethane.