目的探讨早期复苏后外周静脉-动脉血二氧化碳分压差对感染性休克患者预后的预测价值。方法采用前瞻性研究方法,选择2017年5月~2018年5月南京中医药大学附属中西医结合医院重症医学科收治的感染性休克患者,测定患者早期复苏6 h后中心静...目的探讨早期复苏后外周静脉-动脉血二氧化碳分压差对感染性休克患者预后的预测价值。方法采用前瞻性研究方法,选择2017年5月~2018年5月南京中医药大学附属中西医结合医院重症医学科收治的感染性休克患者,测定患者早期复苏6 h后中心静脉、动脉及外周静脉血血气分析,记录患者中心静脉、动脉及外周静脉血二氧化碳分压(PCO_2),计算患者外周静脉-动脉血二氧化碳分压差(Ppv-aCO_2)及中心静脉-动脉血二氧化碳分压差(Pcv-aCO_2),根据患者28 d预后将患者分为存活组及死亡组,采用Pearson相关性分析法分析Ppv-aCO_2与Pcv-aCO_2相关性,采用多因素Logistic分析筛选患者死亡的危险因素,并通过受试者工作特征曲线(ROC)评价各项指标预测患者预后的价值。结果共入选62例感染性休克患者,28 d存活35例,死亡27例。与存活组比较,死亡组患者急性生理与慢性健康评分Ⅱ(APACHEⅡ)(24.2±6.0 vs 20.5±4.9,P=0.011)及序贯器官衰竭的评分(SOFA)(14.9±4.7 vs 12.2±4.5,P=0.027)明显升高。6 h复苏后死亡组患者Pcv-aCO_2(5.5±1.6 vs 7.1±1.7,P<0.001),Ppv-aCO_2(7.1±1.8 vs 10.0±2.7,P<0.001),及动脉乳酸(Lac)(3.3±1.2 vs 4.2±1.3,P=0.003)明显高于存活组。Pearson相关性分析显示PpvaCO_2与Pcv-aCO_2明显相关,r=0.897,R^2=0.805,P<0.001。多因素Logistic回归分析显示Ppv-aCO_2和Lac是感染性休克患者28 d生存率的独立预后因素[(Ppv-aCO_2:β=0.625,P=0.001,相对危险度(OR)=1.869,95%CI:1.311~2.664;Lac:β=0.584,P=0.041,OR=1.794,95%CI:1.024~3.415)]。ROC曲线分析显示,Ppv-aCO_2、Pcv-aCO_2和Lac对感染性休克患者预后均有预测价值,其中Ppv-aCO_2的ROC曲线下面积(AUC)最大,为0.814(95%CI:0.696~0.931,P<0.001),最佳临界值为9.05 mmHg时,预测患者28 d死亡的敏感度为70.4%,特异度为88.6%;Lac的AUC=0.732(95%CI:0.607~0.858,P=0.002),最佳临界值为3.45 mmol/L时,敏感度为70.4%,特异度为74.3%;Pcv-aCO_2的AUC=0.766(95%CI:0.642~0.891,P<0.001),最佳临界值为7.05 mmHg时,敏感度为66.7%,特异度为80.0%。结论Ppv-aCO_2与Pcv-aCO_2相关,与感染性休克患者预后相关,可作为评估感染性休克患者28 d生存率的独立预后指标。展开更多
Enantioselective alternating copolymerization of carbon monoxide with ω undecylenic acid was carried out using cationic palladium catalyst modified by 1,4 3,6 dianhydro 2,5 dideoxy 2,5 bis(diphenylphosphino) L iditol...Enantioselective alternating copolymerization of carbon monoxide with ω undecylenic acid was carried out using cationic palladium catalyst modified by 1,4 3,6 dianhydro 2,5 dideoxy 2,5 bis(diphenylphosphino) L iditol (DDPPI). The chiral diphosphine was proved to be effective in the enantioselective copolymerization. The pure poly(1,4 ketone) was obtained by dissolving the copolymer containing spiroketal and 1,4 ketone units in 1,1,1,3,3,3 hexafluoro 2 propanol and reprecipitating with methanol. Optical rotation, elemental analysis, spectra of 1H, 13 C NMR and IR showed that our copolymer was an optically active, isotatic, alternating poly(1,4 ketone) structure. The copolymerization was carried out at 45 ℃ for 20 h. Molecular weight: n=1.1× 10 4 versus polystyrene, w/ n=1.84. Molar optical rotation: 20 589 =+43°(CH 3COOC 2H 5, 5.0 mg/mL). The productivity of the copolymer of ω undecylenic acid with carbon monoxide was 40.6 g copolymer/(g Pd·h).展开更多
文摘目的探讨早期复苏后外周静脉-动脉血二氧化碳分压差对感染性休克患者预后的预测价值。方法采用前瞻性研究方法,选择2017年5月~2018年5月南京中医药大学附属中西医结合医院重症医学科收治的感染性休克患者,测定患者早期复苏6 h后中心静脉、动脉及外周静脉血血气分析,记录患者中心静脉、动脉及外周静脉血二氧化碳分压(PCO_2),计算患者外周静脉-动脉血二氧化碳分压差(Ppv-aCO_2)及中心静脉-动脉血二氧化碳分压差(Pcv-aCO_2),根据患者28 d预后将患者分为存活组及死亡组,采用Pearson相关性分析法分析Ppv-aCO_2与Pcv-aCO_2相关性,采用多因素Logistic分析筛选患者死亡的危险因素,并通过受试者工作特征曲线(ROC)评价各项指标预测患者预后的价值。结果共入选62例感染性休克患者,28 d存活35例,死亡27例。与存活组比较,死亡组患者急性生理与慢性健康评分Ⅱ(APACHEⅡ)(24.2±6.0 vs 20.5±4.9,P=0.011)及序贯器官衰竭的评分(SOFA)(14.9±4.7 vs 12.2±4.5,P=0.027)明显升高。6 h复苏后死亡组患者Pcv-aCO_2(5.5±1.6 vs 7.1±1.7,P<0.001),Ppv-aCO_2(7.1±1.8 vs 10.0±2.7,P<0.001),及动脉乳酸(Lac)(3.3±1.2 vs 4.2±1.3,P=0.003)明显高于存活组。Pearson相关性分析显示PpvaCO_2与Pcv-aCO_2明显相关,r=0.897,R^2=0.805,P<0.001。多因素Logistic回归分析显示Ppv-aCO_2和Lac是感染性休克患者28 d生存率的独立预后因素[(Ppv-aCO_2:β=0.625,P=0.001,相对危险度(OR)=1.869,95%CI:1.311~2.664;Lac:β=0.584,P=0.041,OR=1.794,95%CI:1.024~3.415)]。ROC曲线分析显示,Ppv-aCO_2、Pcv-aCO_2和Lac对感染性休克患者预后均有预测价值,其中Ppv-aCO_2的ROC曲线下面积(AUC)最大,为0.814(95%CI:0.696~0.931,P<0.001),最佳临界值为9.05 mmHg时,预测患者28 d死亡的敏感度为70.4%,特异度为88.6%;Lac的AUC=0.732(95%CI:0.607~0.858,P=0.002),最佳临界值为3.45 mmol/L时,敏感度为70.4%,特异度为74.3%;Pcv-aCO_2的AUC=0.766(95%CI:0.642~0.891,P<0.001),最佳临界值为7.05 mmHg时,敏感度为66.7%,特异度为80.0%。结论Ppv-aCO_2与Pcv-aCO_2相关,与感染性休克患者预后相关,可作为评估感染性休克患者28 d生存率的独立预后指标。
文摘Enantioselective alternating copolymerization of carbon monoxide with ω undecylenic acid was carried out using cationic palladium catalyst modified by 1,4 3,6 dianhydro 2,5 dideoxy 2,5 bis(diphenylphosphino) L iditol (DDPPI). The chiral diphosphine was proved to be effective in the enantioselective copolymerization. The pure poly(1,4 ketone) was obtained by dissolving the copolymer containing spiroketal and 1,4 ketone units in 1,1,1,3,3,3 hexafluoro 2 propanol and reprecipitating with methanol. Optical rotation, elemental analysis, spectra of 1H, 13 C NMR and IR showed that our copolymer was an optically active, isotatic, alternating poly(1,4 ketone) structure. The copolymerization was carried out at 45 ℃ for 20 h. Molecular weight: n=1.1× 10 4 versus polystyrene, w/ n=1.84. Molar optical rotation: 20 589 =+43°(CH 3COOC 2H 5, 5.0 mg/mL). The productivity of the copolymer of ω undecylenic acid with carbon monoxide was 40.6 g copolymer/(g Pd·h).