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. DOI: 10.11855/j.issn.0577-7402.2015.03.14

2011年至2013年期间，笔者所在医院奉命随海军某型核潜艇先后执行了4次战备远航卫勤保障任务，累计航程×××××海里、航行时间长×××d，其中水下潜航×××d。通过数次远航卫勤保障工作的开展，笔者对艰苦、恶劣环境下，特别是核潜艇远航期间卫勤工作展开有了更深的了解与体会，现将其特点及经验做法介绍如下。

Objective To study the effects of synthesized intervention measures on improving the level of serum electrolyte in nuclear submariner during submerged voyage,so as to provide scientific basis for working out measures of health security. Methods The submariners were divided into two groups: intervention group,and non-intervention group. The intervention group was given some synthesized intervention measures such as taking electrolyte enriched food,multivitamin 29,calcium carbonate D3,and fluorescent lamp shining,etc. The level of serum Na+,K+,Ca2 +was examined before sailing,and on the 3rd d,10th d,20th d,and 30th d of sailing. Results( 1) The incidence of hypokalemia in non-intervention group,and intervention group was 35%,and 5% respectively( P 0.05); that of hypocalcemia 37. 5%,and 10% respectively( P 0. 05).( 2) The level of serun K+in non-intervention group on the 10th d 〔( 3. 52 ± 0. 21) mmol /L〕,20th d 〔( 3. 55 ± 0. 23) mmol /L〕,and 30th d 〔( 3. 6 ± 0. 17)mmol /L〕was lower than that before sailing,as well as on the 3rd d〔( 4. 05 ± 0. 84),( 3. 80 ± 0. 23) mmol /L respectively〕( P 0. 05).( 3) The levels of serum K+,Ca2 +during submerged voyage in intervention group were not significantly different from those before voyage( P 0. 05),but were lower than those at the corresponding time in non-intervention group( P 0. 05). Conclusion The synthesized intervention mesures could reduce the incidence of hypokalemia and hypocalcemia in the submariners during submerged voyage.