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目的：探讨不同程度低血容量性休克患者动静脉血ｐＨ差［ｐＨ（Ａ－Ｖ）］及ＰＣＯ２差［ＰＣＯ２（Ａ－Ｖ）］的变化及临床意义。方法：观察３５例创伤失血性休克（轻度１５例、中重度２０例）ｐＨ（Ａ－Ｖ）及ＰＣＯ２（Ａ－Ｖ）以及重度休克患者治疗过程中ｐＨ（Ａ－Ｖ）及ＰＣＯ２（Ａ－Ｖ）动态变化及其预后。结果：随休克程度加重，ｐＨ（Ａ－Ｖ）进行性增大；中重度休克ＰＣＯ２（Ａ－Ｖ）显著高于轻度休克和对照患者（Ｐ＜００１），后二者无差别（Ｐ＞００５）；重度休克治疗过程中ｐＨ（Ａ－Ｖ）及ＰＣＯ２（Ａ－Ｖ）持续增大者死亡率高。结论：低血容量性休克ｐＨ（Ａ－Ｖ）及ＰＣＯ２（Ａ－Ｖ）随休克程度加重而增大，重度休克治疗期间ｐＨ（Ａ－Ｖ）及ＰＣＯ２（Ａ－Ｖ）持续增大，提示预后不良。
Objective: To investigate the changes and clinical significance of arterial-venous blood pH value (A-V) and PCO2 difference (A-V) in patients with hypovolemic shock. Methods: A total of 35 cases of traumatic hemorrhagic shock (mild 15 cases, moderate to severe 20 cases) were treated with pH (A-V) and PCO2 (A-V) -V) dynamic changes and prognosis. Results: As the degree of shock increased, pH (A-V) increased progressively; moderate to severe shock PCO2 (A-V) was significantly higher than mild shock and control patients (P <001) P> 005); severe shock during the treatment of pH (A-V) and PCO2 (A-V) continued to increase mortality. CONCLUSIONS: Hypovolemic shock pH (A-V) and PCO2 (A-V) increase with the degree of shock, and the values of A-V and PCO2 (A-V) continue to increase during severe shock, Poor prognosis.