HPLC法测定复方美托拉宗片中美托拉宗和缬沙坦的相关物质

目的 建立复方美托拉宗片中美托拉宗和缬沙坦相关物质的HPLC测定方法.方法 采用Agilent Eclipse SB-C18色谱柱(4.6 mm×250 mm,5μm),以0.01 mol/L磷酸二氢钾溶液(pH=3.5)-乙腈为流动相,梯度洗脱,流速:1.0 ml/min,柱温:30℃,检测波长:237 nm,进样量:20μl.结果 美托拉宗、缬沙坦及其相关物质之间分离度良好;美托拉宗在3~30μg/ml、缬沙坦在0.1~2.0μg/ml、缬沙坦杂质B在0.08~2.0μg/ml范围内峰面积与浓度线性关系良好;其平均回收率分别为102.97%、100.81%和100.44%;该法的重复性及中间精密度均符合要求;检测用溶液在室温条件下放置24 h稳定.结论 该法专属性强、灵敏度高、准确可靠,可用于复方美托拉宗片中美托拉宗和缬沙坦相关物质测定.     

RP-HPLC法测定苯噻啶片含量

目的:建立苯噻啶片的含量测定方法。方法:采用反相高效液相色谱法选用S inoChrom OPS-AP(4.6mm×250mm,5μm)色谱柱,检测波长为200nm,流动相为0.05m o l/L磷酸二氢钠缓冲液-乙腈-甲醇(50∶41∶9)(含1.5%三乙胺,磷酸调pH 3.0),流速为0.8 m l/m in,β-萘酚作为内标物。结果:苯噻啶在7~112μg/m l范围内呈良好线性关系(r=0.9999),平均回收率为99.46%(RSD=0.53%,n=3)。结论:本法可用于该片的含量测定,操作简便,结果准确。     

高效液相色谱法测定银杏磷脂胶囊中总黄酮醇苷的含量

目的建立高效液相色谱法(HPLC)测定银杏磷脂胶囊中总黄酮醇苷的含量的方法。方法以Hypersil C18(4.6mm×200mm,5um)为色谱柱;以甲醇-0.4%磷酸溶液(50:50)为流动相;检测波长:360nm;流速:1.0ml/min;结果总黄酮醇苷(槲皮素、山奈素和异鼠李素)的线性范围分别为7.53-120.5lg.ml-1(r= 0.9998)、7.46-119.36μg.ml~1(r=0.9995)、5.05-80.77μg.ml~(-1)(r=0.9996)。平均回收率分别为101.5%,RSD为1.4%。结论该方法快速、准确、重现性好,可作为银杏磷脂胶囊中总黄酮醇苷的含量的方法。     

柱前衍生化HPLC法测定注射用帕米膦酸二钠含量

目的:建立9-氯甲酸芴甲酯(9-fluorenyl methyl chloroformate,FMOC-Cl)柱前衍生化高效液相色谱法(HPLC)测定注射用帕米膦酸二钠含量的方法。方法:碱性条件下供试品与FMOC衍生化反应,采用Linksil HPLC ODS C18色谱柱(4.6 mm×250 mm,5μm),乙腈-0.4%EDTA(p H=7.2)(25∶75)为流动相,流速1 m L·min-1,检测波长为264 nm。结果:帕米膦酸二钠浓度在2³5μg·m L-1范围内与峰面积呈良好线性关系(r=0.9995),检测限为0.5μg·m L-1,平均回收率101.2%(n=9)。结论:本法简单、准确、灵敏,适用于注射用帕米膦酸二钠的含量测定。     

佐米曲普坦胶囊及片剂的人体生物等效性研究

目的比较国产佐米曲普坦胶囊与进口佐米曲普坦片在健康人体内的药代动力学过程,并评价其生物等效性.方法18名健康男性志愿者随机双交叉单剂量口服佐米曲普坦胶囊或片剂10mg,用高效液相色谱法测定血药浓度,3p97软件包计算二者的药动学参数和生物等效性.结果单剂量口服佐米曲普坦胶囊与片剂的药-时曲线均为口服吸收一室模型.t1/2ke分别为(3.72±1.77)、(3.81±1.44)h,tmax分别为(1.42±0.35)、(1.33±0.51)h,cmax分别为(21.68±8.67)、(21.86±10.38)μg/L,AUC(0→t)分别为(75.94±31.34)、(78.40±28.21)(μg?h)/L.佐米曲普坦胶囊的相对生物利用度为(96.86±3.36)%,经方差分析、双单侧t检验及(1-2α)置信区间法统计分析,2种制剂药动学参数无显著性差异(P>0.05).结论国产佐米曲普坦胶囊与进口佐米曲普坦片剂具有生物等效性.     

胃肠健胶囊中芍药苷含量的RP-HPLC测定法研究

目的研究胃肠健胶囊中芍药苷含量测定的方法。方法采用反相高效液相色谱法,ODS-Cl8色谱柱(4.6mm×250mm,5μm);以乙腈-0.5%磷酸溶液(14:86)为流动相;流速为lmL?min-1;检测波长230nm;柱温:30℃。结果芍药苷在5.56-55.6μg?mL-1的范围内与峰面积呈良好的线性关系(r=0.9999),平均回收率为100.2%,RSD为0.54%(n=6)。结论该方法简便、准确,重现性好,适用于胃肠健胶囊的含量测定和质量控制。     

高效液相色谱法测定止眩通脉胶囊中丹参素钠的含量

目的建立HPLC法测定止眩通脉胶囊中丹参素钠含量的方法。方法采用HPLC法,用C18柱(4.6 mm×250mm,5μm),以甲醇∶1%醋酸溶液(8∶92)为流动相,采用校正曲线法来测定止眩通脉胶囊中丹参素钠的含量,检测波长280nm。结果丹参素钠在0.1018-0.509μg范围内线性相关性良好,回归方程为y=362.63x-15.448,r=0.999 8;平均回收率96.18%,RSD为2.76%(n=6)。结论该方法灵敏度高,重复性好,可作为测定止眩通脉胶囊中丹参素钠含量的有效方法。     

液相微萃取-高效液相色谱法测定槐花米及其制剂中芦丁含量

目的:建立液相微萃取-高效液相色谱法测定槐花米及其制剂血栓心脉宁胶囊中芦丁含量的方法.方法:利用自制液相微萃取装置,选择最佳萃取条件,结合高效液相色谱仪,测定中药及其制剂中的芦丁含量.结果:芦丁的线性范围为10 μg/mL～100 μg/mL(n=5,r=0.9925),槐花米和血栓心脉宁胶囊中芦丁的平均加样回收率分别为(101.7±5.5)%(n=9)和(103.4±3.3)%(n=9),检测限为1 μg/mL.结论:该方法能有效去除复杂基体的干扰,适用于中药及其制剂中芦丁的含量测定.     

大剂量呋噻米治疗充血性心力衰竭的临床观察

目的评价呋噻米治疗慢性充血性心力衰竭的疗效。方法常规治疗加静注呋噻米效果差的充血性心力衰竭18例,加用大剂量呋噻米静脉点滴5d,观察静点呋噻米的利尿效应,实验治疗前后监测血压、电解质、心率及体重。治疗过程中适当补充钠、钾和维持血压。结果静点呋噻米每日尿量较实验治疗前明显增加(P<0.01),第2、3、4、5d静点呋噻米量明显少于静点前1d静注剂量及第1d静点剂量(P<0.05,P<0.01);实验治疗后心率、体重及血压显著降低(P<0.05,P<0.01),实验治疗前后血清钾和血清钠无明显改变(P>0.05)。实验治疗后所有患者临床症状和体征明显改善。结论大剂量静点呋噻米用于慢性充血性心力衰竭患者安全有效。     

反相高效液相色谱法测定奥美拉唑肠溶胶囊的含量

目的采用反相高效液相色谱法测定奥美拉唑肠溶胶囊的含量。方法采用Shim-packVP-C18柱(4.6mm×150mm,5μm),以甲醇-水-三乙胺-磷酸(60:40:0.3:0.12)为流动相,流速1.0mL·min-1,检测波长302nm。结果在0.081￣0.81μg·mL-1范围内,奥美拉唑的峰面积与其浓度呈线性关系(r=0.9999);平均回收率为99.23%(n=9),RSD为0.57%(n=9)。结论本法操作简单,准确,可用于测定奥美拉唑肠溶胶囊的含量。     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.