Résumé
Objective To study the effect of different regulation modes of the air in cabin on the arterial blood gas of mariners during a prolonged voyage in a nuclear submarine. Methods During three long distance voyages of the same nuclear submarine, the same air-regeneration device was adopted. According to the different doses and percentages of the oxygen-lithium hydroxide absorbers, the mariners of three voyages were divided by sequence of voyages into control group (C), observation group 1 (A), and observation group 2 (B). The change in arterial blood PaO2 and PaCO2 of mariners in the three groups were detected on the third day of surface navigation (T1), 10th day (T2), 12nd day (T3), 13th day (T4) of submarine navigation, and the day before returning (T5). Result There was no difference between the three groups in T1 and T2 (P>0.05). There was a significant difference in PaO2 and PaCO2 between the two observation groups and the control group on T3, T4 and T5 (P<0.05). Conclusions Different amount and percentage of the oxygenlithium hydroxide showed an influence on PaO2 and PaCO2 of the mariners. Optimal amount and percentage of the oxygen-lithium hydroxide is very important in keeping normal physiological status of mariners in a nuclear submarine.