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[The correlation between CT score of lung injury and oxygenation index in patients with acute hydrogen sulphide poisoning].

Objective: To explore correlation between chest CT score and oxygenation index in patients with acute hydrogen sulphide poisoning, whether CT score can be applied to assess acute lung injury after acute hydrogen sulfide poisoning and provide basis and reference. Methods: The clinic and a series of CT datas of 32 acute hydrogen sulphide poisoning cases were retrospectively analysed and compared, According to GBZ31-2002 (the diagnostic standard of occupational H(2)S acute poisoning) , these patients were divided into 2 grouds including moderate groud and severe groud; The CT score were improved, referenceing the scoring criteria of the chest X-ray; The difference of the CT score and the oxygenation index were analyzed between moderate and severe group in the acute phase and the disperse phase; The correlation between CT score and oxygenation index were analyzed. Results: The CT score in moderate poisoning group were lower than severe group (2.26±1.37 vs 10.44±2.55, 1.34±0.65 vs 4.55±2.45, all P<0.05) in the acute phase and the dissipation phase.The oxygen index of the 19 cases in the acute phase were 307.55±28.29, and the oxygen index of the 8 cases in the dissipation phase was 435.75±37.00; The oxygen index of the 9 cases in the acute phase and the dissipation phase were respectively 193.17±36.41, 347.67±44.49. The oxygen partial pressure and oxygenation index in severe group were significantly lower than those in moderate group (all P<0.01) in the acute phase and the dissipation phase. Pearman correlation analysis showed that the CT score were negatively correlated to the oxygen index in the acute phase and the dissipation phase, respectively (r=-0.97、-0.75, all P<0.01) . Conclusions: The CT score of lung injury and oxygenation index is negatively correlated. The CT score can be used to evaluate the degree of lung injury, and can be used in the evaluation of acute lung injury after acute hydrogen sulfide poisoning.

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