BACKGROUND: Significant hemorrhage together with blood transfusion increases postoperative morbidity and mortality of hepatic resection. Hepatic vascular occlusion is effective in minimizing bleeding during hepatic pa...BACKGROUND: Significant hemorrhage together with blood transfusion increases postoperative morbidity and mortality of hepatic resection. Hepatic vascular occlusion is effective in minimizing bleeding during hepatic parenchymal transection. This article aimed to review the current role and status of various techniques of hepatic vascular occlusion during hepatic resection. DATA SOURCES: The relevant manuscripts were identified by searching MEDLINE, and PubMed for articles published between January 1980 and April 2010 using the keywords 'vascular control', 'vascular clamping', 'vascular exclusion' and 'hepatectomy'. Additional papers were identified by a manual search of the references from the key articles. RESULTS: One randomized controlled trial (RCT) and 5 RCTs showed intermittent Pringle maneuver and ischemic preconditioning followed by continuous Pringle maneuver were superior to continuous Pringle maneuver alone, respectively. Two RCTs compared the outcomes of hepatectomy with and without intermittent Pringle maneuver. One showed Pringle maneuver to be beneficial, while the other failed to show any benefit. One RCT showed that ischemic preconditioning had significantly less blood loss than using intermittent Pringle maneuver. Four RCTs evaluated the use of hemihepatic vascular occlusion. One RCT showed it had significantly less blood loss than Pringle maneuver, while the other 3 showed no significant difference. Only 1 RCT showed it had significantly less liver ischemic injury. No RCT had been carried out to assess segmental vascular occlusion. Two RCTs compared the outcomes of total hepatic vascular exclusion (THVE) and Pringle maneuver. One RCT showed THVE resulted in similar blood loss, but a higher postoperative complication. The other RCT showed less blood loss using THVE but the postoperative complication rate was similar. Both studies showed similar degree of liver ischemic injury. Only one RCT showed that selective hepatic vascular exclusion (SHVE) had less blood loss and liver ischemic injury than Pringle maneuver. CONCLUSION: Due to the great variations in these studies, it is difficult to draw a definitive conclusion on the best technique of hepatic vascular control.展开更多
A new dynamic model for cell-deformation-induced adenosine triphosphate (ATP) release from vascular endothelial cells (VECs) is proposed in this paper to quantify the relationship between the ATP concentration at ...A new dynamic model for cell-deformation-induced adenosine triphosphate (ATP) release from vascular endothelial cells (VECs) is proposed in this paper to quantify the relationship between the ATP concentration at the surface of VECs and blood flow-induced shear stress. The simulation results demonstrate that ATP concentration at the surface of VECs predicted by the proposed new dynamic model is more consistent with the experimental observations than those by the existing static and dynamic models. Furthermore, it is the first time that a proportional-integral-derivative (PID) feedback controller is applied to modulate extracellular ATP concentration. Three types of desired ATP concentration profiles including constant, square wave and sinusoid are obtained by regulating the wall shear stress under this PID control. The systematic methodology utilized in this paper to model and control ATP release from VECs via adjusting external stimulus opens up a new scenario where quantitative investigations into the underlying mechanisms for many biochemical phenomena can be carded out for the sake of controlling specific cellular events.展开更多
OBJECTIVE: To explore the efficacy and safety of the decoction of nourishing marrow and raising energy in terms of Traditional Chinese Medicine(TCM) in patients with vascular dementia.METHODS: Totally 86 patients with...OBJECTIVE: To explore the efficacy and safety of the decoction of nourishing marrow and raising energy in terms of Traditional Chinese Medicine(TCM) in patients with vascular dementia.METHODS: Totally 86 patients with vascular dementia patients hospitalized from September 2010 to January 2015 were recruited and randomly divided into two groups: control group and observation group. Patients in control group received the conventional treatment, whereas patients in another group were treated with the therapy of nourishing marrow and raising energy according to the theory of TCM. Blesse dementia scale scores were measured before and after the treatment for both groups and adverse effect was documented as well.RESULTS: After treatment, Blesse dementia scale scores reduced in both groups, and the difference in score reduction between the two groups was significant(P<0.05). The rate of adverse events was significantly lower in observation group than in control group(P<0.05).CONCLUSION: Our results demonstrate that the decoction of nourishing marrow and raising energy was an effective and safe alternative to vascular dementia in human subjects.展开更多
BACKGROUND: With advances in technology, laparoscopic liver resection is widely accepted. Laparoscopic liver resection under hemihepatic vascular inflow occlusion has advantages over the conventional total hepatic in...BACKGROUND: With advances in technology, laparoscopic liver resection is widely accepted. Laparoscopic liver resection under hemihepatic vascular inflow occlusion has advantages over the conventional total hepatic inflow occlusion using the Pringle's maneuver, especially in patients with cirrhosis.METHOD: From November 2011 to August 2012, eight consecutive patients underwent laparoscopic liver resection under hemihepatic vascular inflow occlusion using the lowering of hilar plate approach with biliary bougie assistance.RESULTS: The types of liver resection included right hepatectomy(n1), right posterior sectionectomy(n1), left hepatectomy and common bile duct exploration(n1), segment 4b resection(n1), left lateral sectionectomy(n2), and wedge resection(n2). Four patients underwent right and 4 left hemihepatic vascular inflow occlusion. Four patients had cirrhosis. The mean operation time was 176.3 minutes. The mean time taken to achieve hemihepatic vascular inflow occlusion was 24.3minutes. The mean duration of vascular inflow occlusion was54.5 minutes. The mean intraoperative blood loss was 361 mL.No patient required blood transfusion. Postoperatively, one patient developed bile leak which healed with conservative treatment. No postoperative liver failure and mortality occurred. The mean hospital stay of the patients was 7 days.CONCLUSION: Our technique of hemihepatic vascular inflow vascular occlusion using the lowering of hilar plate approachwas safe, and it improved laparoscopic liver resection by minimizing blood loss during liver parenchymal transection.展开更多
目的分析脑氧饱和度(rSO_(2))监测控制性降压(CH)对麻醉患者脑保护和认知功能的影响。方法选取行rSO_(2)监测CH麻醉患者200例为研究对象。根据行rSO_(2)监测CH患者术后是否发生围术期神经认知障碍(PND)分为正常组(n=137)和PND组(n=63),...目的分析脑氧饱和度(rSO_(2))监测控制性降压(CH)对麻醉患者脑保护和认知功能的影响。方法选取行rSO_(2)监测CH麻醉患者200例为研究对象。根据行rSO_(2)监测CH患者术后是否发生围术期神经认知障碍(PND)分为正常组(n=137)和PND组(n=63),收集患者治疗前临床资料。采用单因素分析确定行rSO_(2)监测CH患者术后并发PND的影响因素。采用多因素二元Logistic回归分析法筛选行rSO_(2)监测CH患者术后并发PND的独立危险因素。基于筛选出的独立危险因素构建预测模型,并绘制受试者工作特征(ROC)曲线评估其预测价值。结果年龄、术中出血量、行血管外科手术、术中20 min rSO_(2)监测值、术中20 min中心静脉压(CVP)和合并高血压、脑卒中以及手术时间是行rSO_(2)监测CH患者术后并发PND的影响因素(P<0.05)。患者年龄>55岁、术中20 min CVP高、术中20 min rSO_(2)监测值低及行血管外科手术是行rSO_(2)监测CH患者术后并发PND的独立危险因素(P<0.05)。ROC曲线分析结果显示,预测模型曲线下面积(AUC)为0.855。结论临床可通过控制术中CVP以减少失血量,并依据rSO_(2)监测结果及时调整治疗方案,从而降低行rSO_(2)监测CH患者(年龄>55岁,行血管外科手术)术后并发PND的风险。展开更多
Angiogenesis in ischemic tissue is a complex and multi-gene event. In the study, we constructed hypoxic re-sponse elements (HRE) and the Tet-On advanced double-controlled systems and investigated their effects on th...Angiogenesis in ischemic tissue is a complex and multi-gene event. In the study, we constructed hypoxic re-sponse elements (HRE) and the Tet-On advanced double-controlled systems and investigated their effects on the expression of hVEGF165 and angiopoietin-1 (Ang-1) genes in rat cardiomyocytes exposed to hypoxia and pharma-cologic induction. We infected neonatal rat cardiomyocytes with recombinant rAAV-rtTA-Rs-M2/rAAV-TRE-Tight-Ang-1 and rAAV-9HRE- hVEGF165. Our results indicated that the viral titer was 1×1012 vg /mL and the viral purity exceeded 98%. hVEGF165 expression was induced by hypoxia, but not by normoxia (P 0.001). Ang-1 expression was evident under doxycycline induction, but undetectable without doxycycline induction (P 0.001). Immunofluorescence staining showed that positively stained hVEGF165 and Ang-1 protein appeared only under both hypoxia and doxycycline induction. We demonstrate here that HRE and the recombinant Tet-On advanced double gene-controlled systems sensitively regulate the expression of hVEGF165 and Ang-1 genes in an altered oxygen environment and under pharmacological induction in vitro.展开更多
目的基于网状Meta分析系统评价中药注射液辅助治疗血管性痴呆的效果。方法计算机检索PubMed、Web of Science、Cochrane Library、中国知网(CNKI)、万方数据库(Wanfang)、中国生物医学文献数据库(CBM)、维普数据库(VIP)等数据库中有关...目的基于网状Meta分析系统评价中药注射液辅助治疗血管性痴呆的效果。方法计算机检索PubMed、Web of Science、Cochrane Library、中国知网(CNKI)、万方数据库(Wanfang)、中国生物医学文献数据库(CBM)、维普数据库(VIP)等数据库中有关中药注射液辅助治疗血管性痴呆的临床随机对照试验(RCT),检索时限为各数据库建库到2021年12月。用Cochrane偏倚风险评估工具对所纳入的研究进行质量评价,应用Stata16.0软件进行Meta网状分析。结果最终纳入46个RCTs,涉及6种中药注射液。网状Meta分析结果显示:(1)改善总有效率方面:中药注射液疗效排序依次为西医常规治疗联合复方丹参注射液>醒脑静注射液>舒血宁注射液>银杏达莫注射液>疏血通注射液>丹红注射液>西医常规治疗;(2)在MMSE评分方面:中药注射液疗效排序依次为西医常规治疗联合复方丹参注射液>醒脑静注射液>银杏达莫注射液>舒血宁注射液>丹红注射液>疏血通注射液>西医常规治疗;(3)在ADL评分方面:中药注射液疗效排序依次为西医常规治疗联合疏血通注射液>醒脑静注射液>复方丹参注射液>银杏达莫注射液>舒血宁注射液>丹红注射液>西医常规治疗。结论中药注射液辅助西医治疗对血管性痴呆的治疗均显示出优势。其中复方丹参注射液在有效率、MMSE评分改善方面,疏血通注射液在ADL评分改善方面,称为最佳选择的可能性最大。展开更多
文摘BACKGROUND: Significant hemorrhage together with blood transfusion increases postoperative morbidity and mortality of hepatic resection. Hepatic vascular occlusion is effective in minimizing bleeding during hepatic parenchymal transection. This article aimed to review the current role and status of various techniques of hepatic vascular occlusion during hepatic resection. DATA SOURCES: The relevant manuscripts were identified by searching MEDLINE, and PubMed for articles published between January 1980 and April 2010 using the keywords 'vascular control', 'vascular clamping', 'vascular exclusion' and 'hepatectomy'. Additional papers were identified by a manual search of the references from the key articles. RESULTS: One randomized controlled trial (RCT) and 5 RCTs showed intermittent Pringle maneuver and ischemic preconditioning followed by continuous Pringle maneuver were superior to continuous Pringle maneuver alone, respectively. Two RCTs compared the outcomes of hepatectomy with and without intermittent Pringle maneuver. One showed Pringle maneuver to be beneficial, while the other failed to show any benefit. One RCT showed that ischemic preconditioning had significantly less blood loss than using intermittent Pringle maneuver. Four RCTs evaluated the use of hemihepatic vascular occlusion. One RCT showed it had significantly less blood loss than Pringle maneuver, while the other 3 showed no significant difference. Only 1 RCT showed it had significantly less liver ischemic injury. No RCT had been carried out to assess segmental vascular occlusion. Two RCTs compared the outcomes of total hepatic vascular exclusion (THVE) and Pringle maneuver. One RCT showed THVE resulted in similar blood loss, but a higher postoperative complication. The other RCT showed less blood loss using THVE but the postoperative complication rate was similar. Both studies showed similar degree of liver ischemic injury. Only one RCT showed that selective hepatic vascular exclusion (SHVE) had less blood loss and liver ischemic injury than Pringle maneuver. CONCLUSION: Due to the great variations in these studies, it is difficult to draw a definitive conclusion on the best technique of hepatic vascular control.
基金supported by NUS Academic Research Fund (R-263-000-483-112)
文摘A new dynamic model for cell-deformation-induced adenosine triphosphate (ATP) release from vascular endothelial cells (VECs) is proposed in this paper to quantify the relationship between the ATP concentration at the surface of VECs and blood flow-induced shear stress. The simulation results demonstrate that ATP concentration at the surface of VECs predicted by the proposed new dynamic model is more consistent with the experimental observations than those by the existing static and dynamic models. Furthermore, it is the first time that a proportional-integral-derivative (PID) feedback controller is applied to modulate extracellular ATP concentration. Three types of desired ATP concentration profiles including constant, square wave and sinusoid are obtained by regulating the wall shear stress under this PID control. The systematic methodology utilized in this paper to model and control ATP release from VECs via adjusting external stimulus opens up a new scenario where quantitative investigations into the underlying mechanisms for many biochemical phenomena can be carded out for the sake of controlling specific cellular events.
基金funded by Administration of Traditional Chinese Medicine of Shaanxi Province(Grant No.:200781)
文摘OBJECTIVE: To explore the efficacy and safety of the decoction of nourishing marrow and raising energy in terms of Traditional Chinese Medicine(TCM) in patients with vascular dementia.METHODS: Totally 86 patients with vascular dementia patients hospitalized from September 2010 to January 2015 were recruited and randomly divided into two groups: control group and observation group. Patients in control group received the conventional treatment, whereas patients in another group were treated with the therapy of nourishing marrow and raising energy according to the theory of TCM. Blesse dementia scale scores were measured before and after the treatment for both groups and adverse effect was documented as well.RESULTS: After treatment, Blesse dementia scale scores reduced in both groups, and the difference in score reduction between the two groups was significant(P<0.05). The rate of adverse events was significantly lower in observation group than in control group(P<0.05).CONCLUSION: Our results demonstrate that the decoction of nourishing marrow and raising energy was an effective and safe alternative to vascular dementia in human subjects.
文摘BACKGROUND: With advances in technology, laparoscopic liver resection is widely accepted. Laparoscopic liver resection under hemihepatic vascular inflow occlusion has advantages over the conventional total hepatic inflow occlusion using the Pringle's maneuver, especially in patients with cirrhosis.METHOD: From November 2011 to August 2012, eight consecutive patients underwent laparoscopic liver resection under hemihepatic vascular inflow occlusion using the lowering of hilar plate approach with biliary bougie assistance.RESULTS: The types of liver resection included right hepatectomy(n1), right posterior sectionectomy(n1), left hepatectomy and common bile duct exploration(n1), segment 4b resection(n1), left lateral sectionectomy(n2), and wedge resection(n2). Four patients underwent right and 4 left hemihepatic vascular inflow occlusion. Four patients had cirrhosis. The mean operation time was 176.3 minutes. The mean time taken to achieve hemihepatic vascular inflow occlusion was 24.3minutes. The mean duration of vascular inflow occlusion was54.5 minutes. The mean intraoperative blood loss was 361 mL.No patient required blood transfusion. Postoperatively, one patient developed bile leak which healed with conservative treatment. No postoperative liver failure and mortality occurred. The mean hospital stay of the patients was 7 days.CONCLUSION: Our technique of hemihepatic vascular inflow vascular occlusion using the lowering of hilar plate approachwas safe, and it improved laparoscopic liver resection by minimizing blood loss during liver parenchymal transection.
文摘目的分析脑氧饱和度(rSO_(2))监测控制性降压(CH)对麻醉患者脑保护和认知功能的影响。方法选取行rSO_(2)监测CH麻醉患者200例为研究对象。根据行rSO_(2)监测CH患者术后是否发生围术期神经认知障碍(PND)分为正常组(n=137)和PND组(n=63),收集患者治疗前临床资料。采用单因素分析确定行rSO_(2)监测CH患者术后并发PND的影响因素。采用多因素二元Logistic回归分析法筛选行rSO_(2)监测CH患者术后并发PND的独立危险因素。基于筛选出的独立危险因素构建预测模型,并绘制受试者工作特征(ROC)曲线评估其预测价值。结果年龄、术中出血量、行血管外科手术、术中20 min rSO_(2)监测值、术中20 min中心静脉压(CVP)和合并高血压、脑卒中以及手术时间是行rSO_(2)监测CH患者术后并发PND的影响因素(P<0.05)。患者年龄>55岁、术中20 min CVP高、术中20 min rSO_(2)监测值低及行血管外科手术是行rSO_(2)监测CH患者术后并发PND的独立危险因素(P<0.05)。ROC曲线分析结果显示,预测模型曲线下面积(AUC)为0.855。结论临床可通过控制术中CVP以减少失血量,并依据rSO_(2)监测结果及时调整治疗方案,从而降低行rSO_(2)监测CH患者(年龄>55岁,行血管外科手术)术后并发PND的风险。
基金supported by a grant from the National Natural Science Foundation of China (No.30672081)
文摘Angiogenesis in ischemic tissue is a complex and multi-gene event. In the study, we constructed hypoxic re-sponse elements (HRE) and the Tet-On advanced double-controlled systems and investigated their effects on the expression of hVEGF165 and angiopoietin-1 (Ang-1) genes in rat cardiomyocytes exposed to hypoxia and pharma-cologic induction. We infected neonatal rat cardiomyocytes with recombinant rAAV-rtTA-Rs-M2/rAAV-TRE-Tight-Ang-1 and rAAV-9HRE- hVEGF165. Our results indicated that the viral titer was 1×1012 vg /mL and the viral purity exceeded 98%. hVEGF165 expression was induced by hypoxia, but not by normoxia (P 0.001). Ang-1 expression was evident under doxycycline induction, but undetectable without doxycycline induction (P 0.001). Immunofluorescence staining showed that positively stained hVEGF165 and Ang-1 protein appeared only under both hypoxia and doxycycline induction. We demonstrate here that HRE and the recombinant Tet-On advanced double gene-controlled systems sensitively regulate the expression of hVEGF165 and Ang-1 genes in an altered oxygen environment and under pharmacological induction in vitro.
文摘目的基于网状Meta分析系统评价中药注射液辅助治疗血管性痴呆的效果。方法计算机检索PubMed、Web of Science、Cochrane Library、中国知网(CNKI)、万方数据库(Wanfang)、中国生物医学文献数据库(CBM)、维普数据库(VIP)等数据库中有关中药注射液辅助治疗血管性痴呆的临床随机对照试验(RCT),检索时限为各数据库建库到2021年12月。用Cochrane偏倚风险评估工具对所纳入的研究进行质量评价,应用Stata16.0软件进行Meta网状分析。结果最终纳入46个RCTs,涉及6种中药注射液。网状Meta分析结果显示:(1)改善总有效率方面:中药注射液疗效排序依次为西医常规治疗联合复方丹参注射液>醒脑静注射液>舒血宁注射液>银杏达莫注射液>疏血通注射液>丹红注射液>西医常规治疗;(2)在MMSE评分方面:中药注射液疗效排序依次为西医常规治疗联合复方丹参注射液>醒脑静注射液>银杏达莫注射液>舒血宁注射液>丹红注射液>疏血通注射液>西医常规治疗;(3)在ADL评分方面:中药注射液疗效排序依次为西医常规治疗联合疏血通注射液>醒脑静注射液>复方丹参注射液>银杏达莫注射液>舒血宁注射液>丹红注射液>西医常规治疗。结论中药注射液辅助西医治疗对血管性痴呆的治疗均显示出优势。其中复方丹参注射液在有效率、MMSE评分改善方面,疏血通注射液在ADL评分改善方面,称为最佳选择的可能性最大。