血气分析中be.tco2 na ica hct hb分别是什么意思?
推荐回答(2个)
BE
剩余碱
TCO2=total
co2
二氧化碳总量
Na
钠
iCa=Ionized
Calcium
离子化钙
Hct=hematocrit
血细胞容量
Hb
血红蛋白
血气分析能对机体的酸碱平衡状态,电解质紊乱程度,通气功能以及换气功能做出全面的评估,为治疗提供依据
1.血气分析报告内容
•基本信息:时间,样本类型,样本编号,患者ID,
•分析仪在37℃时直接测定的结果(Measured)
•分析仪计算所得的结果(DerivedParameters)
2.主要参数类别
•血气指标:PCO2,PO2,HCO3-,BE值,SO2等
•血中电解质:Na+,K+,Ca2+等
•生化指标:Lac,Hct,Hb等
3.血气分析正常值及临床意义
•PH值
•定义:血中H+浓度的负对数,代表血液酸碱度
•正常值:7.35-7.45•临床意义
PH<7.35为酸血症,PH>7.45为碱血症
单纯靠pH不能区别是代谢性或呼吸性酸碱酸碱失衡
pH正常不能排除酸碱失衡
在病人高热或低体温时,测得的pH要进行校正:
校正pH=0.0147×(37℃-病人体温)
•二氧化碳总量(TCO2)
•定义:血浆中各种形式CO2的总量,包括结合形式的HCO3-,物理溶解的CO2以及其他少量化合物
•正常值:24-32mmol/L
•临床意义:受呼吸和代谢两方面影响
TCO2
=[HCO3¯]
+
PaCO2´
0.03
•剩余碱(Basesexess,BE)
•定义:在T37ºC、PaCO240mmHg、SaO2
100%,
将血液标本滴定至pH7.40时所消耗的酸或碱的量,反映体内碱储备
•正常值:±3mmol/L
•临床意义
+BE表示碱超,即缓冲碱增加,-BE表示碱缺,即缓冲碱减少
排出了呼吸因素的影响,是反映代谢性酸碱平衡重要指标
BEb(全血剩余碱)受Hb浓度的直接影响,需要用Hb浓度校正
BEecf(细胞外液剩余碱)受Hb浓度的影响非常小,可忽略,临床常用
•代酸补碱公式:5%NaHCO3(ml)=BE×kg×0.4
•Na+
•正常值:136-145mmol/L
•1.低钠血症:血清钠低于135mmol/L
病因:钠丢失过多:呕吐腹泻,大面积烧伤等
水潴留过多:肾衰,快速大量输液等
表现:血浆渗透浓度下降,进而引起脑细胞水肿
治疗:处理原发性疾病,纠正血浆渗透浓度,减轻脑水肿
•2.高钠血症:血清钠高于145mmol/L
病因:水摄取不足或丢失过多:如缺水,大量出汗,渗透性利尿等
钠摄入过多:如昏迷后胃肠外高渗营养
表现:血浆渗透浓度升高,脑细胞脱水,脑萎缩,导致脑膜血管撕
裂,出血
治疗:补水为主,补钠为辅
逐步纠正,切记过快
•Ca2+:离子钙
•定义:以游离状态存在的血清钙
•正常值:1.15-1.35mmol/L
•实测离子钙与标准离子钙(Ca++7.4)
•1.离子钙低于1.15mmol/L
病因:甲状旁腺素缺乏,输入大量枸橼酸库血,高镁血症等
表现:肌肉痉挛(骨骼肌及平滑肌),心律失常等
治疗:10%葡萄糖酸钙或氯化钙10-20ml缓慢推注或泵注
•红细胞压积(Hct)
•定义:指一定容积血液中红细胞所占容积的百分比
•正常值:35-51%
•血红蛋白(THbc)
•正常值:11-16g/dL
•主要功能为运输氧和二氧化碳,同时又是很重要的缓冲物质
•乳酸(Lactate,Lac)
•乳酸是糖酵解的代谢产物,产生于骨胳,肌肉,脑和红细胞,经肝脏代谢后由肾分泌排泄•正常值:0.5-2.2mmol/L
•临床意义:可反映组织氧供和代谢状态,评估治疗效果
Lac>4.0mmol/L:需要治疗
Lac>9.0mmol/L:死亡率较高
•全血葡萄糖(Glucose,Glu)
•正常值:3.9-6.1mmol/L
BE剩余碱
TCO2=total co2二氧化碳总量
Na钠
iCa=IonizedCalcium离子化钙
Hct=hematocrit血细胞容量
Hb血红蛋白
血气分析报告内容:
1.基本信息:时间,样本类型,样本编号,患者ID。
2.分析仪在37℃时直接测定的结果(Measured)。
3.分析仪计算所得的结果(DerivedParameters)。
主要参数类别:
1.血气指标:PCO2,PO2,HCO3-,BE值,SO2等。
2.血中电解质:Na+,K+,Ca2+等。
3.生化指标:Lac,Hct,Hb等。
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