Â­. Â­Dry ice is frozen carbon dioxide. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C). Dry ice also has the very nice feature of sublimation -- as it breaks down, it turns directly into carbon dioxide gas rather than a liquid.
The time for a broken collarbone to fully heal depends on the severity of the injury. In children, complete healing may take as little as three to six weeks. In adults, six to 16 weeks or more are often necessary for a collarbone to heal solidly.
There really no significant recovery time from sclerotherapy. If your question is when will all the marks or bruising from the injections resolve, the answer is about 6-8 weeks. Occasionally pigmentation, when it occurs, can even take longer to completely resolve. 7 years ago by Lubbock Vein Specialists.