In other words, the. compressor elevates the boiling. point of the refrigerant to a point. at which the air (or water) mov-. ing across the condenser is low. enough to condense the refriger-. ant to a liquid. Additional passes.
The most common cause is a herniated disk: When a disk develops a tear or crack and bulges into the spinal canal, it can pinch the sciatic nerve. Usually symptoms clear up within about 6 weeks, but for some people, the pain can last.
A study of 295 Finnish concrete workers aged 15-64 years revealed that 42% of men, and as many as 60% of the men aged 45 years or older, reported having sciatica. When interviewed approximately 5 years later, the lifetime prevalence had increased from 42% to 59%.