Abstract
BACKGROUND: This study is part of an extended research onfinding ways to prevent and treat toxic pulmonary edema. This study aimed to examine the gas transport function, acid–base state, and gas composition of blood in the dynamics of experimental toxic pulmonary edema and the effect on them of experimental therapy with a combination of drugs that have shown effectiveness in preliminary studies.
 MATERIALS AND METHODS: Toxic edema of the lungs was modeled in mice by inhalation of toxic doses of phosgene LСt50. Gas and acid–base composition parameters of the blood were determined using a gas analyzer 3 and 24 h after poisoning. Thirty minutes after poisoning, parts of the animals were injected intraperitoneally with a complex of drugs consisting of natrii dimercaptopropansulfonas (unitiol) 150 mg/kg, diclofenac sodium 35. 0 mg/kg, and аprotinin (contrikal) 250 IU/kg.
 RESULTS: The results revealed 3 h after poisoning of animals, changes in the gas composition and parameters of the gas transport function in the blood were detected, and 24 h after poisoning, impaired acid-base balance was noted. The use of a therapeutic combination of drugs consisting of sodium dimercaptopropanesulfonate (unithiol), sodium diclofenac, and aprotinin (kontrikal) led to the partial normalization of the altered parameters of the blood gas composition and parameters of the blood gas transport function but was not accompanied by the normalization of the acid-base state of the blood. The formulation demonstrated a pronounced negative effect on the blood gas composition in intact animals. The treatment of pulmonary edema with the comparison drug unithiol did not result in the normalization of the gas composition and acid-base state of the poisoned animals.
 CONCLUSION:The treatment of toxic pulmonary edema with a combination of medications led to an improvement in the gas composition and gas transport function of the blood.
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