摘要
目的评价中心静脉-动脉二氧化碳分压差[P(CV—a)CO2]在反映感染性休克患者全身组织灌注方面的价值。方法对2009—06~2011—06收住ICU的126例经早期目标导向治疗(EGDT)达标的感染性休克患者进行前瞻性观察研究,测定入组时(T0)的P(cv—a)CO2值,以6mmHg作为其界限,将患者分为低P(CV—a)CO2组(n=68)和高P(CV—a)CO2组(n=58)。测定T0,入组后6、12h(T6、T12)的平均动脉压(MAP)、心率(HR)、心指数(CI)、经皮血氧饱和度(SaO2)、中心静脉氧饱和度(ScvO2)、氧摄取率[ERO2=(SaO2-ScvO2)/SaO2]、P(CV—a)CO2及动脉血乳酸(Lac)。结果在T0低P(CV—a)CO2组的CI明显高于高P(CV—a)CO2组[(4.35±0.90)L/(min·m2)vs(3.14±0.65)L/(min·m2),P〈0.0001),但ScvO2值两组比较差异无统计学意义[(76±4)%vs(75±4)%,P=0.18]。T0~T12,低P(cv—a)CO2组乳酸清除率明显高于高P(CV—a)CO2组[(33±28)%vs(24±24)%,P〈0.05],在T24两组感染相关器官功能衰竭评分系统(SOFA)评分比较差异有统计学意义[(11.1±3.2)分vs(12.4±4.0)分,P〈0.05]。两组28d病死率分别为38.2%、56.9%,差异有统计学意义(P〈0.05)。在入组后各时间点,CI和P(CV—a)CO2均存在负相关。结论感染性休克患者按EGDT进行复苏治疗时,仅以ScvO2作为目标来指导复苏治疗是不够的,当ScvO2已经达到70%时,可将P(CV—a)CO2≥6mmHg作为另一个判断患者存在复苏不充分的指标。
Objective To investigate the value of central venous - arterial carbon dioxide difference [ P( cv - a) CO2 ] as a index of body tissue perfusion in septic shock patients. Methods 126 consecutive septic shock patients underwent early goal -directed therapy (EGDT) were studied prospectively from June 2009 to June 2011. Patients were divided into low P( cv - a) CO2 group ( n = 68 ) and high P(cv -a)CO2 group(n =58) according to a threshold of 6 mm Hg at T0. MAP, HR, cardiac index (CI) , SaO2, ScvO2, 02 extraction ratio [ ERO2 = ( SaO2 - ScvO2 )/SaO2 ], P ( ev - a) CO2 and serum lactate were measured at 0, 6 and 12 h after inclusion (T0,T6, T12 ). Results At To, there was a significant difference in CI between low gap group patients and high gaP group patients [ (4.35±0. 90) L/( min·m2 ) vs ( 3. 14±0.65 ) L/( min·m2 ), P 〈 0. 0001 ], but no differences in ScvO2 values between two groups[ (76±4)% vs (75±4)% , P =0.18]. From To to T12, the clearance of lactate was significantly higher in the low gap group than in the high gap group [ (33±28)% vs (24±24) % ,P 〈 0.05 ]. There was statistical difference in 28 - day mortality (38.2% vs 56.9%, P 〈 0. 05 ) and SOFA score at T24 ( 11.1±3.2 vs 12.4±4.0,P 〈 0.05 ) between two groups. At T0, T6 and T12,CI and P( cv - a) CO2 values were negative correlation ( P 〈 0. 0001 ). Conclusion For septic shock patients after EGDT, only ScvO2 may not be sufficient to guide therapy. When the 70% SevO2 goal value is reached, the presence of P ( cv - a) CO2 larger than 6 mm Hg might be another index to identify patients who still remain inadequately resuscitated.
出处
《中国急救医学》
CAS
CSCD
北大核心
2012年第11期971-975,共5页
Chinese Journal of Critical Care Medicine