综合医院患者动脉血氧饱和度的研究  

Study on oxygen saturation in arterial blood samples in a general hospital

作　　者：阮净[1] 蒋鸿鑫[1] 张宝红 纪华 

机构地区：[1]首都医科大学附属友谊医院实验中心血气室

出　　处：《中国危重病急救医学》1998年第10期620-622,共3页Chinese Critical Care Medicine

摘　　要：目的：了解临床送检动脉血标本的动脉血氧饱和度（ＳａＯ２）计算值和测定值的误差大小，以及用ＳａＯ２计算值指导临床实践是否可靠。方法：用临床各科送检的３１００份动脉血气标本测定值的有关数据，描绘动脉血氧分压（ＰａＯ２）血氧饱和度（ＳａＯ２）关系图及ＰａＯ２血氧含量（Ｏ２ＣＴ）关系图。结果：ＰａＯ２与ＳａＯ２的关系图不是单一的一条曲线，而是一个“Ｓ”形的区域带。当ＰａＯ２＝８．００ｋＰａ（１ｋＰａ＝７．５ｍｍＨｇ）时，ＳａＯ２变化范围为０．７２～０．９８；而当ＳａＯ２＝０．９０时，ＰａＯ２范围为６．００ｋＰａ～１２．２０ｋＰａ，实际半饱和氧分压（Ｐ５０）范围从２．１９ｋＰａ～１０．８８ｋＰａ，而ＰａＯ２与Ｏ２ＣＴ二者几乎无相关性。当ＰａＯ２＝８．００ｋＰａ时，Ｏ２ＣＴ范围为２．５４ｍｍｏｌ／Ｌ～９．１９ｍｍｏｌ／Ｌ，分布范围很大。结论：由ＰａＯ２和标准血红蛋白氧解离曲线推算ＳａＯ２、Ｏ２ＣＴ是不可靠的。Objective:To evaluate the difference between calculated and measured values of oxygen saturation in arterial blood samples(SaO 2),and the reliability of calculated values of oxygen saturation in clinical practice.Methods:Three thousand one hundred arterial blood gas measurements were used to analyze the correlations between measured values of oxygen tension (PaO 2) and measured values of SaO 2 or calculated values of oxygen content (O 2CT).Results:Large variations in PaO 2 versus SaO 2 were found in this study.At PaO 2=8 00 kPa(1 kPa=7 5 mmHg) the SaO 2 range was 0 72 to 0 98,and at SaO 2=0 90,the PaO 2 range was 6 00 kPa to 12 20 kPa,the actual P 50 varied from 2 19 kPa to 10 88 kPa .There was no significant correlation between PaO 2 and O 2CT,i.e.at PaO 2=8 00 kPa the O 2CT ranged from 2 54 mmol/L to 9 19 mmol/L.Conclusions:The results indicate that SaO 2 calculated from measured values of PaO 2 and standard hemoglobinoxygen dissociation curve is unreliable,and SaO 2 should be measured directly.

关 键 词：血气分析 氧饱和度 动脉血氧分压 动脉血氧含量 

分 类 号：R446.1[医药卫生—诊断学]