联立方程新解法测定复方氯霉素醇溶液的含量

本采用联立方程新解法（新Vier ordt法）测定复方氯霉素醇溶液中氯霉素和水杨酸的含量,测定波长为278nm和298nm,平均回收率水杨酸为99．90％±0．34％,氯霉素为100．56％±0．11％,操作简便快速,方法准确可靠,适合医院快速分析,结果满意。     

氯霉素治疗伤寒、副伤寒162例

目前 ,由于伤寒耐药菌株大量出现 ,其用药选择较为棘手。 1998～ 2 0 0 0年 ,我们共收治经培养证实为伤寒、副伤寒 16 2例 ,药敏示对氯霉素敏感 ,故采用以氯霉素为主的联合抗菌治疗 ,效果较好。1　临床资料1 1　一般情况　 16 2例均为散发病病例 ,男 114例 ,女 4 8例 ;年龄 2 5 4± 4 8岁。实验室检查 :(1)白细胞正常 133例 (82 1% ) ,<4× 10 9/Ｌ者 2 6例(16 0 % ) ,>10× 10 9/Ｌ者 3例 (1 9% ) ,嗜酸性粒细胞下降或消失共 15 5例 (95 9% ) ;(2 )肥达试验阳性 15 7例 ,Ｈ在 1∶16 0以上 ,Ｏ在 1∶80以上 ;(3)伤寒、副伤寒杆菌培养及…     

联立方程新解法测定氯霉素滴眼液中氯霉素含量

目的　建立联立方程新解法测定滴眼液中氯霉素含量。方法　用联立方程新解法直接测定氯霉素含量。 2 78nm为测定波长 ,2 5 9nm为参比波长 ,水作空白 ,并与药典法进行比较。结果　方法平均回收率为 99.10 %± 0 .11% ,RSD为 0 .12 %。测定结果与药典法相比没有显著差别。结论　本方法可排除干扰直接测定滴眼液中氯霉素含量。     

氯霉素羊毛脂软膏含量测定方法研究

目的 建立氯霉素羊毛脂软膏的测定方法。方法10％氯霉素羊毛脂软膏经石油醚溶解、温水提取后,用紫外分光光度法测定氯霉素含量。结果氯霉素的平均回收率为99．84％,RSD为0．25％(n=9)。结论 本方法简便,准确。可用于测定氯霉素羊毛脂软膏的含量。     

联立方程组新解法测定氯可滴耳液含量

应用分光光度法中联立方程组的新解法,测定了复方氯霉素滴耳液中氢化可的松和氯霉素的含量。样品不需分离,方法简便,结果可靠。平均回收率:氢化可的松为100.54％,RSD=0.60％,n=5,氯霉素为100.34％,RSD=0.98％,n=5。     

HPLC法同时测定头皮搽剂中氯霉素和盐酸达克罗宁的含量

目的建立同时测定头皮搽剂中氯霉素和盐酸达克罗宁含量的方法。方法采用高效液相色谱法。色谱柱：Diamonsil^TM（钻石）-C18（200mm×4．6mm,5μm）;流动相：甲醇-水-三乙胺（58：42：0．1）用磷酸调pH至5．07;检测波长：280nm;柱温：30℃。结果氯霉素在2～14μg·mL^-1范围内线性关系良好（r=0．9999）,盐酸达克罗宁在2～14μg·mL^-1范围内线性关系良好（r=0．9998）;氯霉素和盐酸达克罗宁的平均回收率分别为103．4％,101．5％。结论本法分离度好,灵敏、快速、简便,可同时测定该头皮搽剂中两组分的含量。     

HPLC法同时测定复方氯霉素醇溶液中氯霉素和水杨酸含量

目的建立HPLC法同时测定复方氯霉素醇溶液中氯霉素和水杨酸含量。方法采用CAPCELL PAK C8DD（4.6mm×250mm,5μm）色谱柱;流动相：甲醇-0.05mol.L^-1磷酸二氢钠溶液（用磷酸调pH至2.5）（29∶71）;流速：1.0ml/m in;检测波长278nm;柱温：40℃;进样量10μl。结果氯霉素、水杨酸的线性范围分别为0.020 54-1.027mg.ml^-1、0.021-1.05mg.ml^-1（r=0.999 9）,平均回收率分别为100.01%、99.85%,RSD分别为0.9%、1.0%（n=9）。结论本方法快速、准确,可同时测定复方氯霉素醇溶液中两种主要成分的含量。可用于复方氯霉素醇溶液的质量控制。     

氯霉素甲硝唑洗鼻剂的含量测定及其有关物质检查方法

目的建立高效液相色谱法测定氯霉素甲硝唑洗鼻剂中氯霉素、甲硝唑含量测定方法及其有关物质氯霉素二醇物、对硝基苯甲醛的定量检查方法。方法采用高效液相色谱法。Intersil C18分析色谱柱(4.6mm ID×250mm,粒径5μm),流动相:甲醇-水-三乙胺(480∶520∶7,含1%磷酸二氢钠,0.2%庚烷磺酸钠,磷酸调pH值为3.0);流速1.0ml/min;检测波长270nm。结果甲硝唑、氯霉素、氯霉素二醇物和对硝基苯甲醛的理论板数分别为4 700、4 5004、400、1 500。回归方程分别为:Y=19156 100.5X+424 145.7(r=0.999 9),Y=65 390 024.2X-5 660.6(r=0.999 9),Y=39 817 070.9X+1 373 589.3(r=0.999 8),Y=83 051 977.5X-284 191.7(r=0.999 8);线性范围分别为0.423 0~2.115μg,0.450 0~2.250μg,0.660 0~3.300μg,0.444 0~2.220μg;平均回收率和RSD分别为100.8%,1.4%;99.2%,1.2;101.1%,1.5;99.3%,1.6;最低检测限分别为0.002,0.002,0.002和0.003μg。结论用高效液相色谱法测定氯霉素甲硝唑洗鼻剂中甲硝唑、氯霉素二醇物、氯霉素、对硝基苯甲醛的含量,操作简便,结果准确。     

HPLC法测定复方氯霉素洗剂中氯霉素和水杨酸的含量

目的建立高效液相色谱法测定复方氯霉素洗剂中氯霉素和水杨酸含量。方法色谱柱为C18（150mm×3．9mm，5μm）；流动相为磷酸盐缓冲液（0．01mmol·L^-1，pH3．5）-甲醇（55：45）；流速为1．0ml／min；检测波长为278nm；柱温为25℃。结果氯霉素、水杨酸分别在4．08～40．8μg·ml^-1（r=0．9989）、7．76～77．6μg·ml^-1（r=0．9990）范围内呈良好的线性关系，平均回收率分别为100．5％、100．1％，RSD分别为0．52％、0．66％（n=9）。结论本方法简便、准确、快速、重现性好，可用于该制剂的含量测定。     

HPLC法测定消炎止痒酊中氯霉素和地塞米松含量

目的：采用HPLC测定消炎止痒酊中氯霉素和地塞米松的含量，方法：采用C18柱，流动相为甲醇－水（75：25v/v).检测波长氯毒素为278nm，地塞米松240nm，结果：氯霉素在100－500ug.ml^-1浓度范围内，回归方程A＝27614＋4627C,r=0.997,回收率98．9％，RSD＝0．43％，地塞米松在30－150ug.ml^-1浓度范围内，峰面积与浓度呈线性关系，回归方程A＝4092＋20148C，r=0.9998，回收率99．1％，RSD＝0．38％，结论；该方法可用于消炎止痒酊中氯霉素和地塞米松的含量测定。     

The role of interventional radiology in trauma

Introduction Interventional Radiology has evolved into a specialty having enormous input into the care of the traumatized patient.In all hospitals,regardless of size,the Interventional Radiologist must consider their relationships with the trauma service in order to     

The acutely limping child

Acute limping may be the result of multiple pathologies in children. The differential diagnosis varies based on the age of the child. Irrespective of age, the initial imaging work-up includes AP and frog leg radiographs of the pelvis and ultrasound; MRI may sometimes be helpful. In children less than 3 years, infections and trauma are most frequent. MRI is the imaging modality of choice when osteomyelitis is clinically suspected. Between the ages of 3 and 10 years, transient synovitis of the hip and Legg-Calvé-Perthes disease are main considerations but infection, inflammation and focal bony lesions are also considered. In children over 10 years, slipped capital femoral epiphysis also is considered.     

Diagnóstico ecográfico del neumotórax

The ultrasonographic diagnosis of pneumothorax is based on the analysis of artifacts. It is possible to confirm or rule out pneumothorax by combining the following signs: lung sliding, the A and B lines, and the lung point. One fundamental advantage of lung ultrasonography is its easy access in any critical situation, especially in patients in the intensive care unit. For this reason, chest ultrasonography can be used as an alternative to plain-film X-rays and computed tomography in critical patients and in patients with normal plain films in whom pneumothorax is strongly suspected, as well as to evaluate the extent of the pneumothorax and monitor its evolution.     

Carbohydrate Supplementation during Exercise: Does It Help? How Much is Too Much?

KEY POINTS· Carbohydrate intake during exercise can delay the onset of fatigue and improve performance of prolonged exercise as well as exercise of shorter duration and greater intensity (e.g., continuous exercise lasting about 1h and intermittent high-intensity exercise), but the mechanisms by which performance is improved are different.     

Do Balance Board Training Programs Reduce the Risk of Ankle Sprains in Athletes?

Introduction Ankle sprains are the most common musculo-skeletal injury that occurs in athletes,particularly in sports that require jumping and landing on one foot such as soccer,and basketball(1-4).These injuries often result in significant time loss from participation,long-term disability,and have a major impact on health care costs and resources(5-8).     

磁共振DWI和动态增强鉴别颅底脊索瘤和侵袭性垂体瘤的应用

目的 探讨磁共振扩散加权成像(DWI)和动态增强在颅底脊索瘤和侵袭性垂体瘤(IPA)鉴别诊断中的应用价值.方法 搜集经手术病理证实且影像学有鞍区破坏的颅底脊索瘤患者15例、向鼻咽部侵犯的IPA患者20例.测量二者的表观扩散系数(ADC)值,绘制受试者工作特征曲线(ROC),分析动态增强曲线的类型,统计达峰时间(TTP)、增强峰值(EP)和最大对比增强率(MCER),分析各个参数在鉴别诊断中的价值.结果 颅底脊索瘤的ADC值为(1.274±0.07)×10-3mm2/s,高于IPA ADC值(0.672±0.03) ×10-3 mm2/s(P ＜0.001),ADC阈值为0.964×10-3mm2/s时,ROC曲线下面积为0.997,敏感度为93.3％,特异度为100％.颅底脊索瘤时间-信号强度曲线(TIC)Ⅰ型14例,TICⅢ型1例,此例TICⅢ型者TTP约40 s;IPA TIC Ⅰ型7例,TICⅢ型13例.颅底脊索瘤和IPA的EP、MCER差异均有统计学意义(P ＜0.001).结论 ADC值和TIC的类型及其相关参数(EP,MCER)有助于颅底脊索瘤和IPA之间的鉴别.     

Treatment of intrahepatic arteriovenous fistula in hepatocellular carcinoma with N-butyl-2-cyanoacrylate

Primary hepatocellular carcinoma (HCC) continues to be one of the most common malignancies with an incidence of approximately one million cases per year and a dismal prognosis; some authors have reported a median survival of 1 ～ 2 months after diagnosis. Although surgery remains the only hope for cure, few patients are candidates[1,2].     

U50,488H对正常及缺氧心肌细胞L型钙电流的作用

目的 探讨心脏阿片受体和β-受体相互作用的机制。方法 采用全细胞膜片钳技术,观察U50,488H(β-阿片受体选择性激动剂)对正常和缺氧心肌细胞L型钙电流的作用。结果 U50,488H剂量依赖性(0．1～100μmol／L)抑制正常心肌细胞的L型钙电流及异丙肾上腺素(0．1μmol／L)激动的钙电流,而细胞缺氧后,这一抑制作用减弱;U50,488H对Forskolin(10μmol／L)激动的L型钙电流无明显影响。结论 β-阿片受体对β-受体信号的负性调节作用在细胞缺氧后减弱,其作用位点可能发生于β-受体与腺苷酸环化酶环节之间。