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。     

Hematocrit level and associated mortality in hemodialysis patients

Although a number of clinical studies have shown that increased hematocrits are associated with improved outcomes in terms of cognitive function, reduced left ventricular hypertrophy, increased exercise tolerance, and improved quality of life, the optimal hematocrit level associated with survival has yet to be determined. The association between hematocrit levels and patient mortality was retrospectively studied in a prevalent Medicare hemodialysis cohort on a national scale. All patients survived a 6-mo entry period during which their hematocrit levels were assessed, from July 1 through December 31, 1993, with follow-up from January 1 through December 31, 1994. Patient comorbid conditions relative to clinical events and severity of disease were determined from Medicare claims data and correlated with the entry period hematocrit level. After adjusting for medical diseases, our results showed that patients with hematocrit levels less than 30% had significantly higher risk of all-cause (12 to 33%) and cause-specific death, compared to patients with hematocrits in the 30% to less than 33% range. Without severity of disease adjustment, patients with hematocrit levels of 33% to less than 36% appear to have the lowest risk for all-cause and cardiac mortality. After adjusting for severity of disease, the impact of hematocrit levels of 33% to less than 36% is vulnerable to the patient sample size but also demonstrates a further 4% reduced risk of death. Overall, these findings suggest that sustained increases in hematocrit levels are associated with improved patient survival.     

联合内分泌治疗对前列腺和睾丸的影响

目的 探讨抑那通和缓退瘤联合治疗对正常前列腺,增生的前列腺（ＢＰＨ）和前列腺癌以及睾丸的作用。方法 对１６例接受联合内分泌治疗至少３个月且有治疗前后病理资料的前列腺癌患者的标本进行了系统的病理学检查。对内分泌治疗后的睾丸标本与同龄未接受治疗的进行对照研究。结果 １４例内分泌治疗后的前列腺标本２例未见残存癌灶,９例对治疗有明显的反应;３例对治疗反应差,治疗并未降低前列腺癌的病理分期。３例内分泌治疗后     

准分子激光PRK术后的临床分析

目的 对１１１眼屈光范围球镜在－３．００￣－１７．００Ｄ及柱镜在－０．５０Ｄ￣－４．５０Ｄ范围的患者进行了ＰＲＫ术后的分析。方法 采用美国ＶＩＳＸ２０／２０Ｂ准分子激光系统的最新软件包进行角膜切削,并行术前后的主客观验光及角膜透明度检查。结果与结论 准分子激光ＰＲＫ术是目前理想的屈光手术之一,特别对于中低度近视尤为适合,对高度近视则其预见性稳定性较差,并发症的发生并未成为影响术后效果的主要因素。     

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.     

第二信使系统和其介导的基因表达对针灸效应影响的研究

从微观水平研究针灸效应对揭示其机理有重要的意义。本文从第二信使系统和其介导的基因表达对针灸效应影响的研究方面综述了针灸效应的终结反映于细胞内生物效应的变化(即对机体不同器官组织细胞内的物质代谢调节 ) ,从一个侧面提示 ,针灸对机体各系统的调节作用最终是在细胞通过胞内信息传导系统实现的     

辨证分期治疗慢性盆腔炎合并免疫性不孕症18例疗效观察

目的：探讨辨证分期治疗慢性盆腔炎合并免疫性不孕症的临床疗效。方法：选择慢性盆腔炎合并免疫性不孕症(血清抗精子抗体阳性)患者18例，采用辨证分期治疗。月经干净后，治以活血化瘀、理气祛湿为主；在(或相当于)排卵期或排卵后，治以补肾养血，活血化瘀为主；在经前期，治以理气活血调经为主；在月经干净后至经前期，加用小剂量阿司匹林。结果：盆腔炎临床症状及体征痊愈7例，显效6例，有效5例；全部患者获得妊娠，宫内妊娠者17例(观察至妊娠3月，均正常)，输卵管妊娠1例；结论：中医辨病辨证结合的周期疗法加小剂量阿司匹林治疗慢性盆腔灸合并免疫性不孕症有一定的疗效。     

地肤子及其混淆品的扫描电镜与紫外法鉴别研究

分别采用扫描电镜和紫外光谱法对地肤子、藜、小藜和扫帚菜四种药材进行了比较鉴别。结果表明：扫描电镜下四种药材的胞果、毛茸、气孔和种子形态特征有较为明显的区别；紫外光谱扫描结果表明地肤子和扫帚菜无明显区别，但与藜和小藜之间有显著区别。     

头孢氨苄胶囊在人体药代动力学及其相对生物利用度的研究

目的 :研究头孢氨苄胶囊在人体内的药物动力学及其相对生物利用度。方法 :18名健康志愿者单剂量口服不同生产厂家的头孢氨苄胶囊 ,以反相高效液相色谱法测定其血药浓度经时过程。结果 :受试制剂和参比制剂中头孢氨苄主要药物动力学参数分别为 :Tmax为 (1.14± 0 .31)、(0 .83± 0 .2 3) h,cmax为 (18.81± 5 .16 )、(2 1.2 4± 4 .71)μg/ m l,t1 /2β为 (1.95±0 .11)、(1.89± 0 .11) h,AUC为 (47.85± 7.33)、(46 .91± 7.15 )μg· h· m l- 1 。 结论 :被试制剂与参比制剂是生物等效制剂。     

家兔血清中黄芩苷的薄层扫描法测定及药动学参数

采用薄层扫描法测定家兔血清中的黄芩甙及在兔体内的药物动力学参数。结果显示血清药物浓度在0．5～25μg／ml范围内线性关系良好，体内药物动力学呈开放性二室模型。并通过回收率试验确定了方法的准确性。