乙酰胆硷和电刺激迷走神经对HC1引起的大鼠胃粘膜损伤的保护作用

本工作观察了乙酰胆硷(Ach)和电刺激迷走神经对0.6N HCl引起的胃粘膜出血性损伤的保护作用,发现皮下注射50μg/kg的氯化Ach和电刺激膈下迷走神经5min,可明显降低HCl引起的胃粘膜出血量,这一作用可被消炎痛及阿托品所阻断。提示这种保护作用是通过依赖于M-受体的内源性前列腺素。     

Study of nerve regeneration in centrocentral anastomosis

Summary Nerve regeneration was studied in a model of centrocentral anastomosis (CCA) performed on the sciatic nerve of the rat. Experimental CCA was made by suturing the proximal end of the peroneal branch on the proximal end of the sural branch, placing between them a peroneal nerve graft (Group I, 20 rats) or a silicone chamber (Group II, 12 rats). Nerve grafts had a length of 5mm and silicone chambers 7 mm. In six silicone chambers an 1 mm nerve graft was placed in the centre of the tube. In group I animals anterograde degeneration was studied by cutting the graft 60 days after surgery. In group II, nerve regeneration was studied 2, 4 and 8 weeks after surgery. Results indicate that in CCA: 1) regenerated axons coming from one nerve end grow into the graft but do not cross the contralateral suture line; 2) regeneration is poorer in silicone chambers than in nerve grafts; and, 3) in silicone chambers regeneration is related to time. The reduction in the regenerative capability in CCA seems to be related to the alteration of nerve sprouts aiming for the peripheral targets.     

雪旺细胞源运动神经营养蛋白对周围神经再生的影响

目的：研究雪旺细胞源运动神经营养蛋白对周围神经再生的影响。方法：６０只ＳＤ大鼠均分为３组，Ａ和Ｂ组分别在桥接于大鼠右侧坐骨神经断端之间的硅胶管内加入２６ＫＤ和５０ＫＤ的雪旺细胞源运动神经营养蛋白，Ｃ组加ＰＢＳ液作为对照。术后１～６月每隔半月测定实验侧坐骨神经功能指数，术后３月测定实验侧坐骨神经的电生理和形态学指标。结果：Ａ和Ｂ组实验侧坐骨神经的功能指数、电生理和形态学指标与Ｃ组比较，差别有非常显著性。结论：２６ＫＤ和５０ＫＤ雪旺细胞源运动神经营养蛋白对周围神经再生有促进作用。     

VASOCONSTRICTION IN THE RENAL VASCULAR BED DURING EXERCISE: STUDIES IN CONTROL AND HEART FAILURE RABBITS

1. The effects of graded treadmill exercise on renal blood flow (RBF) were examined in seven rabbits, in which congestive heart failure (CHF) was produced by the administration of doxorubicin, 1 mg/kg, twice weekly for 8 weeks, and in seven controls. A third group of five rabbits underwent doxorubicin treatment with the addition of surgical section of the left renal sympathetic nerve. 2. During submaximal exercise, there was a small reduction in RBF in controls, which was greatly exaggerated in CHF. 3. In both control and heart failure rabbits, there was a precipitous fall in RBF as exercise fatigue developed. 4. Renal sympathectomy ablated these changes in RBF during exercise. 5. It is concluded that in heart failure there is an exaggerated, sympathetically mediated, diversion of blood flow away from the kidney. The onset of exercise fatigue in both normal and heart failure rabbits is accompanied by a marked intensification of this process.     

Peripheral seventh nerve palsy due to transorbital intracranial penetrating pontine injury

The case of a child injured by a knitting needle penetrating transorbitally and intracranially, resulting in carotid cavernous fistula and pontine injury, is reported. After receiving medical and endovascular treatment, the only remaining abnormal neurological manifestation was right peripheral facial nerve palsy. The clinical sequences of events and the demonstration of a pontine lesion leading to peripheral facial palsy are presented. Facial nuclear injury with a penetrating trauma is an extremely rare condition. It is important to identify the anatomical regions injured in penetrating traumas. The lesions must be identified by computerized tomography, magnetic resonance imaging, clinical and laboratory investigation.     

健侧C7移位至桡神经治疗全臂丛神经根性撕脱伤改良术的解剖学基础

目的寻求健侧C7神经根移位治疗全臂丛神经根性撕脱伤手术中尺神经与桡神经的最佳吻合部位。方法在10具20侧福尔马林固定的成人尸体上肢标本上观察桡神经及其肱三头肌肌支的解剖学特征;尺神经的解剖学特征;尺神经不同水平与对侧颈根部的距离。结果桡神经从后侧束发出部位到发出肱三头肌长头的第一支肌支之间的距离为(8.2±1.4)cm,从发出长头的第一个肌支部位到外侧头最后一个肌支发出部位之间的距离为(4.8±0.7)cm。尺神经肘部以上几乎无分支,尺神经在发出部位的直径为(6.7±0.6)mm;在肘部的直径为(6.3±0.5)mm;在腕部的直径为(4.0±0.4)mm;从锁骨下尺神经发出部位到肘部的长度为(29.0±2.6)cm;从锁骨下尺神经发出点到对侧颈根部的距离为(18.0±1.8)cm。结论健侧C7神经根移位修复桡神经,尺神经与桡神经的最佳吻合部位是锁骨下区,在此部位吻合不但能保证肱三头肌功能恢复,而且大大缩短桥接神经的长度。     

外源性NGF对坐骨神经损伤后脊髓前角细胞CNTF表达的影响

目的　探讨坐骨神经损伤后脊髓前角细胞睫状神经营养因子 (CNTF)表达变化及外源性神经生长因子(NGF)与CNTF表达的关系。方法　采用大鼠坐骨神经损伤动物模型 ,分为给药组和对照组 ,每只大鼠又分为损伤侧组 (L组 )和健侧组 (R组 )两个亚组。用原位杂交、免疫组化技术检测CNTF的表达水平 ,观察各组在 1d、7d、1 4d、2 1d及 2 8d时的变化。用计算机图像自动处理系统进行定量分析研究。结果　给药组损伤侧脊髓前角细胞中CNTF表达水平除 1d、7d组外其余均多于对照组 (P <0 .0 5 ) ;而两组健侧脊髓前角细胞中CNTF表达水平无统计学意义 (P >0 .0 5 )。结论　①外源性NGF能促进坐骨神经损伤后损伤侧脊髓前角细胞中CNTF表达水平的增加 ;而对健侧CNTF表达水平无明显作用。②坐骨神经损伤后损伤侧脊髓前角细胞中CNTF表达水平在最初的 3周内逐渐下降 ,然后开始恢复 ,但至第 4周尚未恢复到开始时的水平 ;而两组健侧CNTF表达水平则无明显差异 (P >0 .0 5 )。     

Treatment of fecal incontinence by temporary sacral nerve stimulation

Summary BACKGROUND: Sacral nerve stimulation (SNS) is an option for the treatment of fecal incontinence in patients with morphologically intact, but weak external anal sphincter. METHODS: In ten patients a percutaneous test-SNS was performed. Two patients suffered from fecal incontinence after surgery, one patient after incomplete leg palsy after traumatic spine injury and seven patients from idiopathic incontinence. Incontinence score, anorectal manometry and patient diary were performed before and after test-SNS. RESULTS: Intraoperative response (Bellows action) could be achieved in 90% of patients. Test-SNS was successful in 50% of patients. In these patients, resting pressure was increased by 100.1% and squeeze pressure by 84.5%. CONCLUSIONS: SNS is an effective therapy in a subset of patients with fecal incontinence. Fifty percent of patients tested are eligible for implantation of a permanent stimulation device.      

脑干、三叉神经及大脑动脉环的可视化研究

目的 建立人体脑干、三叉神经及大脑动脉环的可视化数字模型。方法 采用首例中国数字化可视人体数据集，在SGI工作站上对脑干及其周围毗邻结构进行计算机三维重建并立体显示。结果 获得人体脑干、三叉神经及大脑动脉环等器官组织的三维重建结构，可对其进行任意径线和角度的适时三维测量。结论 首例中国数字化可视人体数据集能够提供完整而精确的解剖断面数据，脑干及其毗邻的三叉神经、大脑动脉环的可视化模型准确反映出该区域复杂的解剖学结构特点及其相邻器官间的空间毗邻关系，可为该区域的疾病的影像诊断和外科治疗提供形态学依据。