In three cases in which chemonucleolysis with chymopapain was used for the treatment of back and sciatic pain, gas from the vacuum phenomenon of a degenerated lumbar intervertebral disc was recovered. In one of these, the gas analyzed by gas chromatography contained 90%--92% nitrogen.
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| http://dx.doi.org/10.2214/ajr.128.6.1056 | DOI Listing |
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