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血液气体分析已广泛使用于临床,在呼衰的诊断、治疗和判断预后方面,具有重要意义。现就血气分析与临床较为密切的几项主要指标及临床意义作一简单介绍。一、酸碱度(PH值): 表示血液中氢离子浓度的指标,正常值为7.35～7.45。酸碱失衡时,若PH值正常,则可能是某一完全代偿的单纯型失衡,亦可能为呼酸与代碱或呼碱与代酸并存的复合型失衡。PH<7.35或PH>7.45时,应结合PaCO_2和HCO_3~-判断是否为某一型的非完全代偿性单纯型失衡,还是包括该型失衡在内的复合型失衡。二、氧分压(PaO_2): 指血液中物理溶解的氧分子所产生的压力,是反映机体氧合状况的重要指标,正常值为95～100
Blood gas analysis has been widely used in clinical, respiratory failure in the diagnosis, treatment and prognosis, is of great significance. Now on the blood gas analysis and clinical more closely several major indicators and clinical significance of a brief introduction. First, the pH (PH value): that of blood hydrogen ion concentration index, the normal value of 7.35 ~ 7.45. Acid-base imbalance, if the PH value is normal, it may be a complete compensation for the simple type of imbalance, may also be on behalf of the acid or alkali and alkali and acid co-exist with the complex imbalance. When PH <7.35 or PH> 7.45, PaCO_2 and HCO_3 ~ should be combined to determine whether it is an incompletely compensated simplex imbalance of a certain type or a complex imbalance including this type of imbalance. Second, the partial pressure of oxygen (PaO_2): refers to the pressure generated by the physical dissolution of oxygen molecules in the blood is an important indicator of the body oxygenation status, the normal value of 95 to 100