门静脉高压症动物模型血流动力学的CT灌注成像研究  被引量:3

Hemodynamics assessment by perfusion computed tomography in a canine model of portal hypertension

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作  者:林元为[1] 陈伟建[1] 黄求理 杨运俊[1] 梁盼[1] 杨博洋[1] 王宏清[1] 林德新[3] 张启瑜[3] 熊兵[1] 

机构地区:[1]温州医学院附属第一医院放射科,浙江省325000 [2]宁波市第一人民医院影像科 [3]温州医学院附属第一医院肝胆外科,浙江省325000

出  处:《中华普通外科杂志》2011年第5期402-405,共4页Chinese Journal of General Surgery

摘  要:目的探讨CT灌注成像监测肝硬化门静脉高压症(PHT)门静脉压力变化的应用价值。方法采用门静脉主干缩窄联合硫代乙酰胺溶液喂养诱导建立比格犬肝硬化门静脉高压症模型,分别对PHT组和对照组比格犬行螺旋CT肝脏灌注成像扫描,用去卷积法计算肝脏各血流灌注参数,开腹后采用玻璃水柱法测定两组比格犬的门静脉压力,并将相应指标进行统计学分析。结果①对照组门静脉压力为(14.5±2.2)cmH2O,PHT组门静脉压力为(23.1±2.8)emH2O2两组之间相比差异具有统计学意义(t=-8.979,P〈0.05)。②对照组与PHT组肝血流量分别为(112±14)ml·100g-1·min-1和(96±11)ml·100g-1·min-1;肝血容量分别为(10±3)ml·100g。和(11±5)ml·100g-1;平均通过时间分别为(7.1±2.0)s和(10.4±3.5)。;肝动脉分数分别为(24%4-5%)和(37%±6%);肝动脉灌注量分别为(27±6)ml·100gg-1·min-1和(35±5)ml·100g-1·min-1;门静脉灌注量分别为(85±13)ml·100g-1·min-1和(61±11)ml·100g-1·min-1,统计结果显示两组除肝血容量外其余各参数之间相比差异均有统计学意义(P〈0.05)。③PHT组门静脉压力与门静脉灌注量、肝血流量之间呈负相关,与平均通过时间、肝动脉分数之间呈正相关,其中与门静脉灌注量相关性最显著(r=-0.842),两者关系的直线回归方程为Y=36.624—0.219X。利用门静脉压力与门静脉灌注量的直线回归方程计算PHT组比格犬门静脉压力为(23.2±2.4)cmH2O,与手术实测的门静脉压力(23.1-I-2.8)cmH2O具有良好的相关性(r=0.843,P〈0.05)。结论肝脏CT灌注成像为无创、有效监测门静脉压力提供了一种新途径。Objective To evaluate perfusion computed tomography in the assessment of portal vein pressure changes in an experimental dog model of liver cirrhosis and portal hypertension. Methods The canine model of cirrhosis and portal hypertension was induced by portal vein stenosis with combination of systemic thioacetamide(TAA) feeding in drinking water. All of the Beagles in control group and cirrhotic group underwent hepatic perfusion on a spiral CT scanner. The parameters of hepatic perfusion were calculated by the method of deconvolution. The portal vein pressure was measured by a laparotomy surgery. Results (!) In control group, the portal vein pressure was ( 14. 5 ± 2. 2 ) em H2 O, while it was (23.1 ± 2. 8) em H20 in PHT group, there was significant difference in the portal vein pressure between the two groups (P〈0.05). (2) The blood flow(BF) was (112 ± 14) ml · 100 g-1 . min-1 in controls, while (96 ± 11 ) ml· 100g-1·min-1 in PHT group; the blood volume (BV) in control group and PHT group was (10^3) ml·100 g-1 and (11 ±5) ml · 100 g-l, respectively; the mean transit time(MTT) was (7. 1 ± 2.0) s and ( 10.4 ± 3.5 ) s, respectively; the hepatic arterial fraction (HAF) was (24 ± 5 ) % and ( 37 ± 6)%, respectively; the hepatic artrial perfusion (HAP) was(27±6) ml · 100g-1·min-1and (35 ±5) ml · 100 g-l . min-1, respeetively; the portal venous perfusion (PVP) was (85 ± 13) ml · 100 g-1·min-1 and (61 ± 11 ) ml· 100g-1·min-1, respectively. There was significant difference in all parameters between the two groups except the parameter BV ( P 〈 0. 05 ). (3) In PHT group, the PVP and BF were negatively correlated with the portal vein pressure, while positively correlated with MTI" and HAF. Portal vein pressure was negatively correlated with PVP, the equation, Y = 36. 624 -0. 219X, was deduced with linear regression analysis, by which the portal vein pressure in PHT Beagles was ( 23.2 ± 2.4�

关 键 词:高血压 门静脉 体层摄影术 X线计算机 疾病模型 动物 血流动力学 

分 类 号:R575.2[医药卫生—消化系统]

 

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