AIM:To characterize the impact of the Pringle ma-neuver (PM) and ischemic preconditioning (IP) on total blood supply to the liver following hepatectomies. METHODS: Sixty one consecutive patients who un-derwent hepatic...AIM:To characterize the impact of the Pringle ma-neuver (PM) and ischemic preconditioning (IP) on total blood supply to the liver following hepatectomies. METHODS: Sixty one consecutive patients who un-derwent hepatic resection under in flow occlusion were randomized either to receive PM alone (n = 31) or IP (10 min of ischemia followed by 10 min of reperfusion) prior to PM (n = 30). Quantification of liver perfusion was measured by Doppler probes at the hepatic artery and portal vein at various time points after reperfusion of remnant livers. RESULTS: Occlusion times of 33 ± 12 min (mean ± SD) and 34 ± 14 min and the extent of resected liver tissue (2.7 segments) were similar in both groups. In controls (PM), on reperfusion of liver remnants for 15 min, portal perfusion markedly decreased by 29% while there was a slight increase of 8% in the arterial blood flow. In contrast, following IP + PM the portal vein flow remained unchanged during reperfusion and a significantly increased arterial blood flow (+56% vs baseline) was observed. In accordance with a better postischemic blood supply of the liver, hepatocellular injury, as measured by alanine aminotransferase (ALT) levels on day 1 was considerably lower in group B compared to group A (247 ± 210 U/I vs 550 ± 650 U/I, P < 0.05). Additionally, ALT levels were significantly correlated to the hepatic artery in flow.CONCLUSION: IP prevents postischemic flow reduction of the portal vein and simultaneously increases arterial perfusion, suggesting that improved hepatic macrocirculation is a protective mechanism following hepatectomy.展开更多
Hepatic ischemia and reperfusion (I/R) injury during liver surgery is still the main cause of postoperative liver failure and the subsequent rise of mortality in these patients. During the last few years, a multitude ...Hepatic ischemia and reperfusion (I/R) injury during liver surgery is still the main cause of postoperative liver failure and the subsequent rise of mortality in these patients. During the last few years, a multitude of underlying mechanisms have been extensively characterized and many different protective approaches have been evaluated under experimental conditions. Some of them have already found their way into small sized clinical trials. In this Topic Highlight series of articles, we present recent insights into promising protective concepts including the regulation and optimization of hepatic blood flow, molecular mechanisms of preconditioning and pharmacological approaches with the aim of limiting hepatic I/R injury. Leading international experts present the latest experimental evidence in their fields stressing clinically relevant ideas, which are now on the edge of entering clinical practice.展开更多
目的探讨3种不同肝血流阻断方式在肝肿瘤切除术中的应用。方法将74例肝肿瘤患者根据肝血流阻断方式分为3组:A组(n=40)行pringle法,B组(n=23)行全肝血流阻断(THVE),C组(n=11)行解剖性肝血流(肝动脉、门静脉及肝静脉)阻断。并观察3组肝血...目的探讨3种不同肝血流阻断方式在肝肿瘤切除术中的应用。方法将74例肝肿瘤患者根据肝血流阻断方式分为3组:A组(n=40)行pringle法,B组(n=23)行全肝血流阻断(THVE),C组(n=11)行解剖性肝血流(肝动脉、门静脉及肝静脉)阻断。并观察3组肝血流阻断时间、手术时间、出血量及并发症等情况。结果A组和B组手术时间均较C组显著缩短(均P<0.01),B组肝门阻断前1 min和肝门开放后1 min中心静脉压均显著高于肝门阻断后(均P<0.01),B组和C组出血量均较A组显著减少(均P<0.01),A组和B组术后3 d ALT、AST水平均较C组显著升高(均P<0.01),3组肝血流阻断后均未发生肾脏及心血管系统并发症。结论肝肿瘤行肝切除术时行pringle法血流阻断是一种简便方法,但出血量多;全肝血流阻断是一种减少出血的有效方法;解剖性肝血流阻断技术要求高,但术中肝损伤小,可避免缺血-再灌注损伤。展开更多
基金Supported by The Deutsche Forschungsgemeinschaft, No. DFG SCHA 857/1-1
文摘AIM:To characterize the impact of the Pringle ma-neuver (PM) and ischemic preconditioning (IP) on total blood supply to the liver following hepatectomies. METHODS: Sixty one consecutive patients who un-derwent hepatic resection under in flow occlusion were randomized either to receive PM alone (n = 31) or IP (10 min of ischemia followed by 10 min of reperfusion) prior to PM (n = 30). Quantification of liver perfusion was measured by Doppler probes at the hepatic artery and portal vein at various time points after reperfusion of remnant livers. RESULTS: Occlusion times of 33 ± 12 min (mean ± SD) and 34 ± 14 min and the extent of resected liver tissue (2.7 segments) were similar in both groups. In controls (PM), on reperfusion of liver remnants for 15 min, portal perfusion markedly decreased by 29% while there was a slight increase of 8% in the arterial blood flow. In contrast, following IP + PM the portal vein flow remained unchanged during reperfusion and a significantly increased arterial blood flow (+56% vs baseline) was observed. In accordance with a better postischemic blood supply of the liver, hepatocellular injury, as measured by alanine aminotransferase (ALT) levels on day 1 was considerably lower in group B compared to group A (247 ± 210 U/I vs 550 ± 650 U/I, P < 0.05). Additionally, ALT levels were significantly correlated to the hepatic artery in flow.CONCLUSION: IP prevents postischemic flow reduction of the portal vein and simultaneously increases arterial perfusion, suggesting that improved hepatic macrocirculation is a protective mechanism following hepatectomy.
基金Supported by The International Anesthesia Research Society
文摘Hepatic ischemia and reperfusion (I/R) injury during liver surgery is still the main cause of postoperative liver failure and the subsequent rise of mortality in these patients. During the last few years, a multitude of underlying mechanisms have been extensively characterized and many different protective approaches have been evaluated under experimental conditions. Some of them have already found their way into small sized clinical trials. In this Topic Highlight series of articles, we present recent insights into promising protective concepts including the regulation and optimization of hepatic blood flow, molecular mechanisms of preconditioning and pharmacological approaches with the aim of limiting hepatic I/R injury. Leading international experts present the latest experimental evidence in their fields stressing clinically relevant ideas, which are now on the edge of entering clinical practice.
文摘目的探讨3种不同肝血流阻断方式在肝肿瘤切除术中的应用。方法将74例肝肿瘤患者根据肝血流阻断方式分为3组:A组(n=40)行pringle法,B组(n=23)行全肝血流阻断(THVE),C组(n=11)行解剖性肝血流(肝动脉、门静脉及肝静脉)阻断。并观察3组肝血流阻断时间、手术时间、出血量及并发症等情况。结果A组和B组手术时间均较C组显著缩短(均P<0.01),B组肝门阻断前1 min和肝门开放后1 min中心静脉压均显著高于肝门阻断后(均P<0.01),B组和C组出血量均较A组显著减少(均P<0.01),A组和B组术后3 d ALT、AST水平均较C组显著升高(均P<0.01),3组肝血流阻断后均未发生肾脏及心血管系统并发症。结论肝肿瘤行肝切除术时行pringle法血流阻断是一种简便方法,但出血量多;全肝血流阻断是一种减少出血的有效方法;解剖性肝血流阻断技术要求高,但术中肝损伤小,可避免缺血-再灌注损伤。
