脉冲Nd：YAG激光照射对大鼠炎症牙龈组织的作用

患实验性牙龈炎的大鼠牙龈（６例）经脉冲掺钕钇铝柘榴石激光（Ｎｄ：ＹＡＧ激光）照射后进行光镜及超微结构观察。目的在于了解低能量Ｎｄ：ＹＡＧ激光照射对牙龈炎症的治疗作用。炎症牙龈经输出能量为１．５Ｗ，脉冲数为２０ＰＰＳ的激光照射后与对照组相比较，形态学上有如下变化：上皮细胞无变性；牙龈上皮层数较炎症时减少；上皮下炎细胞浸润明显减少；上皮细胞间隙变小；上皮下结缔组织内产生大量的排列致密的胶原纤维。结果提     

Differences in the hypothermic response to ethanol in rats selectively bred for oral ethanol preference and nonpreference

The duration of retention of tolerance to ethanol was tested in the alcohol-preferring (P) and alcohol-nonpreferring (NP) rats lines, using ethanol-induced hypothermia as a measure of tolerance. Rats received two injections of ethanol (3.5 g/kg) body wt, IP) and the time between the injections was 1, 2, or 3 days. When one day separated the two injections, tolerance to the hypothermic effect of a second “test” injection was found in both lines. When 2 or 3 days separated the two injections, the P line showed a loss of tolerance and the NP line showed sensitization to ethanol. Sensitization in the NP line grew stronger when the interval between injections was increased from 2 to 3 days. The duration of retention of tolerance to ethanol-induced hypothermia in the P line was shorter than has previously been reported for motor impairment in this line. It appears that the duration of tolerance retention in the P line depends on the test used to measure tolerance. Sensitization to ethanol in the NP line may be associated with low oral ethanol intake. This research was supported, in part, by grants AA08312, AA03243, and AA07611 from the PHS     

实验性颅脑伤大鼠脑组织SOD和MDA的变化

目的：观察实验性颅脑伤大鼠脑组织超氧化物歧化酶(SOD)和丙二醛(MDA)的动态变化，探讨SOD和MDA在颅脑伤病理损伤机制中的作用。方法：采用自由落体致伤方法制备大鼠颅脑伤模型(模型组)，并以正常大鼠作对照(对照组)，分别于造模后3、5和7d处死动物取脑，测定海马和皮质中SOD活力和MDA含量。结果：模型组大鼠海马SOD活力在3个时间点均显著低于对照组，而MDA含量均显著高于对照组；模型组大鼠皮质SOD活力在造模后3、5d时显著低于对照组，而MDA含量则显著高于对照组，到7d时二者与对照组均无明显差异。结论：大鼠颅脑伤时脑组织SOD活力显著降低，而MDA含量则显著增高，提示SOD和MDA可能参与颅脑伤病理损伤机制并在其中发挥重要作用。     

应用吊带方法经皮膀胱颈悬吊治疗女性压力性尿失禁

目的：介绍吊带方法经皮膀胱颈悬吊术治疗女性压力性尿失禁的经验。方法：在近膀胱颈水平，阴道前壁与尿道之间隧道状切口内预置两端带有尼龙线的网状聚丙烯片，术中窥镜监视下，应用Vesica穿刺针经皮穿刺行膀胱颈悬吊治疗女性压力性尿失禁19例。结果：随访3－45个月，平均17个月，除1例逼尿肌反射低下排尿稍费力外，18例患者无尿失禁及排尿困难。结论：吊带方法经皮膀胱颈悬吊术治疗女性压力性尿失禁，操作简便，创伤小，恢复快，临床效果满意。     

Ketanserin降低清醒自发性高血压大鼠血压波动性的机理初探

应用计算机化清醒大鼠血流动力学测定技术，观察５－ＨＴ２受体阻滞剂Ｒｉｔａｎｓｅｒｉｎ（Ｒｉｔ）和α１受体阻滞剂哌唑嗪对清醒自发性高血压大鼠（ＳＨＲ）的血压、血压波动性（ＢＰＶ）和动脉压力感受性反射血压控制部分（ＡＢＲ－ＢＰ）的效应，旨在初步探讨兼具５－ＨＴ２受体和α１受体阻滞作用地新型抗高血压药Ｋｅｔａｎｓｅｒｉｎ降低ＢＰＶ的机制。结果表明：Ｒｉｔ对ＳＨＲ无降压作用，但侧脑室给药明显提高ＡＢＲ－Ｂ     

Spinal cord restitution following compression injuries in rats

Spinal cord compression injuries were produced in rats by applying weights to a plate 2.2 x 50 mm in size, placed on the exposed midthoracic dura covering the spinal cord. The influence of force and duration of compression was studied by using 3 different weights, 20, 35 and 50 g, applied for 1, 5 and 10 min. Postoperative neurological function was tested by the inclined plane method and the rats were observed for 3 weeks. Neurological impairment increased with force and duration of compression. It is therefore reasonable to conclude that patients suffering from spinal cord injury should be investigated immediately for signs of persistent cord compression. If this is present, early decompression might be of value, although nothing is known in man concerning the limits of force and duration of compression permitting postoperative neurological recovery.     

交链孢酚单甲醚在大鼠小鼠体内的分布

对食管癌高发区粮食中分离的互隔交链孢霉的毒素交链孢酚单甲醚(AME)在大鼠、小鼠体内的分布进行研究。给动物腹腔内注射氚标记的交链孢酚单甲醚(~3H-AME),然后在不同时间测各脏器的放射性。结果表明:在所测9个脏器中,2h肝脏含量最高,食管下段在大小鼠分别居第四和第三。但大小鼠分别在72、24h则以食管下段最高,说明AME及其代谢物在此清除较慢,即对其有较高的亲和力。     

大鼠肺微血管和肺泡铸型的扫描电镜观察

用扫描电镜观察以甲基丙烯酸甲酯灌注鼠的肺微血管和肺泡。胸膜下毛细血管较稀疏,网孔粗大。毛细血管部分成锐角折返,亦可见毛细血管盲端。肺泡隔毛细血管均成扁平状膨大,且相互吻合成单层密集网。肺泡铸型为大小不等、不规则的多面体,表面可见肺泡Ⅱ型细胞核之压迹。两肺泡之间可见呈桥式连接的肺泡孔,亦可见部分呈三通管样相连。     

中枢去甲肾上腺素能神经元在脑水肿发生过程中的作用实验研究

为探讨中枢去甲肾上腺素（ＮＥ）能神经元兴奋对脑水肿的影响，作者观察了刺激或损毁大鼠右侧蓝斑后，同侧大脑半球脑水含量的变化．结果，ＮＥ能神经元兴奋时，同侧半球脑皮质神经元也处于兴奋状态，脑内ＮＥ，肾上腺素（Ｅ）含量分别达正常组的３０７．４６％和２９９．４１％，脑水含量（７９．２１±０．２８％）也较正常组（７８．４６±０．４２％）明显增高（Ｐ＜０．０１）．损毁蓝斑后，同侧半球脑内ＮＥ，Ｅ含量仅为正常组的１２．８０％和３２．３１％，脑水含量稍有下降，无统计学意义．提示中枢ＮＥ能神经元兴奋可能是脑水肿发生过程中的重要环节之一．