高强度聚焦超声和乙醇毁损兔腹腔神经节后其显微结构及血压、脉率的变化

目的观察乙醇和高强度聚焦超声毁损兔腹腔神经节(celiac ganglion,CG)后CG的形态结构和血压、脉率的变化。方法14只兔随机分为A、B两组,每组各7只,分别用95%的乙醇和高强度聚焦超声毁损CG,连续记录并比较在毁损后0、1、3、5、10min的血压和脉率变化。术后取CG作光学镜和电镜观察。结果镜下见两组兔CG均出现核浓缩,偏位,A组核仁明显;膜性细胞器部分轮廓尚存。有髓纤维分层或失去髓鞘结构,无髓纤维呈空泡状。B组全部核仁消失,空泡形成,膜性细胞器消失,轴突灶性坏死。A组在毁损后3min、B组在1min时血压较基础压有显著下降(P<0.01),在1min时,A组与B组下降幅度的差异有统计学意义(P<0.01)。B组在5min、10min时脉率有显著的增加(P<0.05,P<0.01)。结论应用高强度聚焦超声较95%的乙醇毁损CG对血压和脉率有更大的影响。

Changes of Blood Pressure and Pulse Rate and the Microstructure of Celiac Ganglion in Rabbits with Damaged Celiac Ganglion Induced by High Intensity Focused Ultrasound and Alcohol

Objective To observe the changes of blood pressure (BP), pulse rate (PR) and the microstructure of celiac ganglion (CG) in rabbits with damaged CGs induced by alcohol and high intensity focused ultrasound. Methods Fourteen rabbits were randomly divided into two groups The CGs of the rabbits in group A and group B were damaged by alcohol and high intensity focused ultrasound respectively. The changes of BP and PR 0, 1, 3, 5, and 10 minutes after the damage were recorded and compared. The microstructure changes of the damaged CGs were examined under optics microscope and electron microscope. Results Ganglionic morphology changes were obvious in both groups, with moved and concentrated karyons. In the CGs damaged by alcohol, the nucleolus still existed; some organelles could be identified; the myelination nerve fibre lost its myelin sheath or delaminated while the unmyelination nerve fibre exhibited vacuole formation. In the CGs damaged by high intensity focused ultrasound, all nucleolus disappeared, vacuole formed, intracellular membrane disappeared, axone locally necrotized. The BPs of the rabbits started to decrease three minutes after the alcohol treatment (P<0.01), one minute after the high intensity focused ultrasound (P<0.01). Significant differences of BP decline were observed between the two groups one minute after the CG damages. (P<0.01). The PRs of the rabbits increased 5 minutes and 10 minutes after the high intensity focused ultrasound(P<0.05,P<0.01). Conclusion Using high intensity focused ultrasound to damage CGs has more significant impacts on BPs and PRs than alcohol.