肾癌脑转移放射治疗32例临床分析

恶性肿瘤脑转移预后与原发肿瘤类型有关,一般而言,肾癌脑转移患者中位生存比其它恶性肿瘤的要差。脑转移最佳治疗仍有争论,但就大多数患者而言全脑放射仍是主要治疗方法。本文分析32例肾癌术后脑转移单纯全脑放射治疗结果,以探讨肾癌脑转移治疗及相关预后因素。1临床资料与方法1．亚临床资料我院1992年元月～1997年4月共32例肾癌术后脑转移接受全脑放射治疗,其中男22例,女10例,中位年龄52．5（32～64．5）岁。原发肿瘤组织学类型包括肾细胞癌27例,Wilm’s瘤3例和混合细胞癌2例。左肾癌14例,右肾癌18例,32例全部作了肾癌根治术。…     

异丙酚乳剂用于腹腔镜胆囊切除术40例体会

目的：探讨异丙酚乳剂用于腹腔镜胆囊切除术麻醉中的优缺点。方法：１００例施行腹腔镜胆囊切除术患者,随机分为异丙酚组４０例,硫喷妥钠组６０例。观察记录两组患者手术前、给药后１ｍｉｎ、气管插管时、插管后５ｍｉｎ、ＣＯ２气腹后３ｍｉｎ血流动力学各参数并观察停药后患者苏醒情况及麻醉副作用等。结果：异丙酚比硫喷妥钠更适用于腹腔镜胆囊切除术麻醉,但也要注意异丙酚对呼吸、循环系统功能的抑制作用。     

α-细辛脑对气管纤毛运动的影响

目的：研究α－细辛脑对气管纤毛运动的影响,探讨其祛痰作用机理。方法：采用鸽子在体气管和家兔离体气管试验：设空白、阳性对照组及α－细辛脑高、中、低剂理组,以墨汁走距和运行速度作为气管纤毛运动指标,各试验组与空白对照组进行ｔ检验。比较其组间差异。结果：给浅度麻醉的鸽子静脉注射α－细辛脑３２ｍｇ／ｋｇ、１６ｍｇ／ｋｇ、８ｍｇ／ｋｇ,墨汁走距分别为（１．１７±０．１２）ｃｍ,（１．１５±０．１７）ｃｍ和（     

应用Opalescence脱色方法治疗色素牙的疗效观察(附112例临床分析)

目的 :研究 Opalescence脱色方法对色素牙脱色的疗效。方法 :将 Opalescence脱色剂涂于个别托模唇、颊侧内 ,病人每晚睡前刷牙后擦干牙面 ,戴上托模 ,晨起摘下冲洗干净 ,每天 1次 ,疗程一般为 2周 ,视疗效及患者反应增减用药时间。结果 :1 1 2例患者脱色治疗后氟斑牙的显效率( 80 .8%)高于四环素牙的显效率 ( 66.7%)。有 2 3例病人疗效不甚满意。结论 :应用 Opalescence脱色治疗活髓色素牙效果明显 ,脱色后牙体呈自然色泽 ,透明感好 ,特别适用于年龄较轻、无牙体缺损的氟斑牙及四环素牙的脱色。     

Radiology of the orbital apex

The orbital apex, formed by the superior orbital fissure and optic canal, is the cross-road between the orbit and the intracranial structures. Pathological processes may extend intracranially via the superior orbital fissure and vice versa. In addition to intrinsic soft tissue lesions, various pathological processes may involve the surrounding osseous anatomy. Malignant lesions arising from adjacent structures or from haematogeneous metastasis may also infiltrate this region.     

Isolated pedunculated congenital corneal dermoid

PURPOSE: To investigate a case of isolated pedunculated congenital corneal dermoid. METHODS: Case report. RESULTS: In a 14-day-old infant, the pedunculated portion of the dermoid was removed and confirmed by histopathologic examination. No surgical complication or recurrence was encountered, and the patient is waiting for a rotational autokeratoplasty. CONCLUSIONS: Prompt treatment of such an unusual tumor is important to allow for visual rehabilitation and development.     

Suppression of voltage-dependent K+ currents in retinal bipolar cells by ascorbate

Ascorbate, often used as an antioxidant in neural studies, may also serve as a neuromodulator in the vertebrate central nervous system (CNS), in that it modulates the synaptic actions of glutamate and dopamine. Retina of fish contain a high concentration of ascorbate. The release and/or uptake of neurotransmitters are related to membrane potential, which to a large extent is determined by the activity of K+ channels. As retinal bipolar cells are subject to synaptic input from glutamatergic and dopaminergic sources, the effects of ascorbate on voltage-dependent K+ currents (I(K)(v)) of the mixed rod-cone ON-center bipolar cells (Mb) in goldfish retinal slices were studied using whole-cell recording techniques. I(K)(V) was suppressed reversibly 60% by 100-200 microM ascorbate. The effect of ascorbate was not due to changes in pH, oxidative stress, lipid peroxidation, any Ca2+-dependent or Na+-dependent action. However, the suppressive effect of ascorbate was blocked by cholera toxin and Wiptide, a protein kinase A (PKA) inhibitor. It is concluded that ascorbate, at physiological concentrations, inhibits I(K)(V) of bipolar cells via a Gs-protein-PKA system. This effect of ascorbate should be taken into account when using ascorbate as an antioxidant in retinal studies involving dopamine.     

氯地滴眼液对家兔眼压及房角组织影响的研究

目的 观察氯地滴眼液对家兔眼压及房角组织影响。方法 用６０只家兔设实验和对照组,以含０．１７５％氯霉素和０．１５％地塞米松的氯地跟液滴眼,每日４次,生理盐水对照。于１／２、１、２、３月测眼压后处死家兔以电镜观察房角组织变化。结果 眼压和房角组织结构与对照组无明显差异。结论 临床应用氯地眼液３月内是安全的。     

左旋四氢巴马汀对单个豚鼠心室肌细胞钙电流的阻滞作用

AIM: To study the effect of l-tetrahydropalmatine (l-THP) on L-type calcium channel. METHODS: Patch clamp technique (whole cell recording) was used to record L-Ca2+ current in single cardiac myocyte. RESULTS: 1) l-THP 1, 10, and 100 micromol.L-1 reduced ICa-max from (999 +/- 93) pA to (700 +/- 111) pA, (582 +/- 66) pA, and (420 +/- 112) pA (n = 6, P < 0.01), respectively. 2) l-THP reduced the voltage at half-maximal inactivation (V1/2) of L-Ca2+ channel to more negative potentials by 9 mV (n = 5, P < 0.05). 3) l-THP caused both tonic and use-dependent reduction of Ca2+ current. Tonic block of l-THP on Ca2+ current was 46% +/- 8% (n = 6, P < 0.01). The degree of use dependent blocking was 13.5% +/- 2.4% (n = 6, P < 0.05) at 1 Hz, the degree increased to 44% +/- 5% (n = 6, P < 0.01) at 3 Hz. 4) l-THP delayed half-recovery time of Ca2+ channel recovery from inactivity from (94 +/- 39) ms to (170 +/- 42) ms(n = 6, P < 0.01). CONCLUSION: l-THP has a moderate inhibitory effect on L-Ca2+ current.