Plaster of Paris and Orthopedic Bandages

Fractures are a common clinical condition that requires surgical treatment once they have displaced significantly. If the fracture is not significantly displaced, conservative fixation can be used, and both orthopedic bandages and plaster of Paris are commonly used in using disposable surgical dressing.

Here is the content:

l Production of plaster of Paris

l Orthopedic bandage wrapping method

Production of plaster of Paris

Plaster of Paris is generally produced from natural sources. It is also a by-product of the phosphate industry and certain other industries.

At high temperatures, plaster of Paris can produce calcium sulfide and carbon dioxide by interaction with carbon. Gypsum CaSO4-2H2O is a natural mineral, which is white, light yellow, and light pink to a gray transparent or translucent plate or fibrous crystals. Brittle nature, 128 ℃ loss of 1.5H2O, 163 ℃ loss of 2H2O. The industry will be raw gypsum heated to 150 ℃ dehydration mature gypsum CaSO4-1/2H2O (or burnt gypsum), add water, and transformed into CaSO4-2H2O. according to this can be used for plaster bandages, making plaster models, chalk, crafts, and building materials. Plaster of Paris is also used as a speed regulator for cement to control its hardening speed. Gypsum is also used in paint putty and paper filler, and it is used as a coagulant in daily tofu ordering. Plaster is used in agriculture to reduce the alkalinity of the soil. CaSO4 is not very soluble, and its solubility is in a special condition of rising first and then decreasing. Such as 10 ℃ solubilities of 0.1928g/100g water (the same below), 40 ℃ for 0.2097, 100 ℃ down to 0.1619, so that dissolved calcium sulfate hard water in high-pressure boilers (up to 400 ℃) in the scale, causing harm, should be used in advance Na2CO3 CaSO4 into more insoluble CaCO3 precipitation and remove (so that hard water softening). In the marble encounter dilute H2SO4 because of the generation of slightly soluble CaSO4 package on the surface of the marble to hinder the contact with the acid, so the reaction stops, so you cannot use dilute H2SO4 and marble to make CO2.

Orthopedic bandage wrapping method

1, There must be one or two assistants, respectively, at the ends of the fracture traction affected limb, to fix the fracture end, the disposable surgical dressing wrapper in the middle of the implementation of the orthopedic bandage.

2、If there is a wound in the fracture or dressing, the wound must be strictly disinfected and wrapped with a clean dressing before adding external fixation outside.

3、If the external fixation is in plaster of Paris, use the traditional winding method and wrap the whole plaster with full coverage.

4、If the external fixation is with a long deck for a certain limb, follow the method of plaster wrapping and wrap the whole range. The long splint of the upper limb is generally used before and after and on both sides, while the long splint of the lower limb is generally used posteriorly and on both sides.

5、When splinting external fixation, it is necessary to separate the bone protrusion from the deck with cotton pads to avoid the formation of pressure sores.

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