THE OXYGEN STATUS OF THE ARTERIAL BLOOD REVISED - RELEVANT OXYGEN PARAMETERS FOR MONITORING THE ARTERIAL OXYGEN AVAILABILITY

作     者：SIGGAARDANDERSEN, O GOTHGEN, IH WIMBERLEY, PD FOGHANDERSEN, N 

作者机构：GENTOFTE HOSPDEPT ANAESTHESIADK-2900 COPENHAGENDENMARK HERNING HOSPDEPT CLIN CHEMDK-7400 HERNINGDENMARK 

出 版 物：《SCANDINAVIAN JOURNAL OF CLINICAL & LABORATORY INVESTIGATION》 (斯堪的纳维亚临床与实验研究杂志)

年 卷 期：1990年第50卷第Sup203期

页      面：17-28页

核心收录：

学科分类：1001[医学-基础医学(可授医学、理学学位)] 1010[医学-医学技术（可授医学、理学学位）] 10[医学] 

主　　题：ACID-BASE STATUS CARBON DIOXIDE COMPUTER ALGORITHM 2,3-DIPHOSPHOGLYCERATE HEMOGLOBIN HEMOGLOBIN-OXYGEN AFFINITY PH PHYSIOLOGY RESPIRATION 

摘      要：The new generation of very accurate multiwavelength oximeters, e.g. OSM3, for in vitro measurement of the hemoglobin oxygen saturation, total hemoglobin concentration, and carboxy- and methemoglobin fractions opens new aspects of oxygen monitoring. Combined with the data from the blood gas analyzer (e.g. ABL300) these very accurate measurements allow the calculation of several derived oxygen parameters on the basis of a set of newly developed calculation algorithms. The traditional parameters obtained from an arterial sample are the oxygen tension (pO2) and the hemoglobin oxygen saturation (sO2). Clinical examples illustrate that the pO2 and the sO2 even in combination may give misleading information. The new algorithm calculates three extra oxygen parameters. 1) The oxygen extraction tension, p(x), defined as the tension required to extract 2.3 mmol of oxygen per liter blood. It signals the mixed venous pO2 level on the assumption that the arterio-venous oxygen difference is normal (2.3 mmol/L). 2) The concentration of extractable oxygen, c(x), defined as the concentration of oxygen extracted at a tension of 5.0 kPa. 3) The oxygen compensation factor, Q(x), derived as (2.3 mmol/L)/c(x). It may be interpreted as the increase in cardiac output necessary to maintain a normal mixed venous pO2 of 5 kPa. These three parameters indicate the oxygen availability of the blood and summarize important properties of the arterial blood in relation to oxygen supply of the tissues, including the arterial pO2, the active hemoglobin concentration (equivalent to the oxygen capacity), and the hemoglobin oxygen affinity (p50). The set of data measured with the blood gas analyzer, e.g. the ABL300 combined with the data measured with the OSM3 contains much more information than is routinely utilized. This information is extracted and summarized by our calculation algorithm. Omitting the calculation of the extra oxygen parameters involves a risk of losing valuable information.