The application of the level of molecules with medium molecular mass (MM) and wave length E254 and 280 nm was tried in 30 patients, operated on for various diseases of the organs of abdominal cavity and their purulent complications. Besides routine treatment weak flow membrane blood oxygenation was carried out. As a result of the study it was established that the level of medium molecular peptides appears to be a criteria of effectiveness of the weak-flow membrane blood oxygenation and determines duration of the procedure. The initial concentration of MM from 1,0 relative units and more duration of the blood oxygenation period should be limited by 2 hours. This method can be regarded, as independent mode od detoxication.
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