纳米羟基磷灰石人工骨的生物相容性研究

目的 评价新型纳米羟基磷灰石人工骨的生物相容性，从而为其在骨缺损修复领域中的临床运用提供依据。方法 分别进行急性毒性试验、热原试验、皮内试验、肌肉植入试验、骨植入试验等生物相容性试验。结果 这种纳米羟基磷灰石人工骨材料无毒，无热原性，植入兔肌肉后逐渐发生降解。结论 此纳米羟基磷灰石人工骨材料具有良好的生物相容性。     

多孔型羟基磷灰石陶瓷人工骨的研制及其生物相容性研究

采用羟基磷灰石粉末。有机多聚体、粘结剂和植物干燥叉枝研制成多孔型准基磷灰石陶瓷人工骨，有独特的连通孔道。通过热源试验、溶血试验、急性全身毒性试验和细胞毒性试验评价其生物相容性。实验结果表明，多孔型羟基磷灰石陶资人工骨不致热，不致溶血，无毒性，对培养的小鼠成纤维细胞的生长、增殖、代谢无不良影响，培养细胞形态正常．因此，可以认为这种人工骨具有优良的生物相容性。     

化学沉淀法制备纳米HAP-sol及其血液相容性研究

目的:研究改性后的纳米HAP粒子的血液相容性.方法:采用化学沉淀法制备纳米羟基磷灰石溶胶(HAP-sol),以聚丙烯酸纳(PAA-Na)为稳定剂.通过体外溶血试验和血淋巴细胞毒性试验(MTT法)来评价HAP-sol的血液相容性.结果:红细胞溶血率在0～3%之间,细胞毒性分级为0级或1级,纳米HAP-sol对血红细胞无溶血作用,也没有明显的细胞毒性效应.结论:以PAA-Na为稳定剂,纳米HAP-sol有良好的血液相容性,纳米HAP-sol用于静脉注射药物有一定的安全性.     

聚乳酸/羟基磷灰石纳米复合材料的生物相容性研究

目的 对聚乳酸/羟基磷灰石纳米复合材料的生物相容性进行研究,为其在骨的缺损修复领域中的临床运用提供依据.方法 检测聚乳酸/羟基磷灰石纳米复合材料的细胞相容性、溶血百分率和急性毒性.结果 聚乳酸/羟基磷灰石纳米复合材料组的细胞数量增加与对照组比较差异无显著性(P＞0.05).纳米复合材料的溶血百分率＜5%,溶血程度属于正常范围.实验动物2周内一般情况良好,高、低剂量组动物无一死亡.各组动物体重增加差异无显著性(P＞0.05).结论 本实验证明,聚乳酸/羟基磷灰石纳米复合材料有良好的生物相容性.     

快速凝结复合羟基磷灰石陶瓷粉生物相容性评价 I.毒性与细胞相容性研究

对自行研制的快速凝结复合羟基磷灰石陶瓷粉的毒性及细胞相容性进行研究。实验包括：（１）亚急性毒性实验;（２）溶血试验;（３）皮内试验;（４）热原试验;（５）体外细胞毒性试验。结果表明该材料安全无毒、无溶血性、对皮肤无剌激,不含热原物质,具有良好的细胞相容性     

快速凝结复合羟基磷灰石陶瓷粉生物相容性评价 I.毒性与细胞相容性研究

对自行研制的快速凝结复合羟基磷灰石陶瓷粉的毒性及细胞相容性进行研究。实验包括：（１）亚急性毒性实验；（２）溶血试验；（３）皮内试验；（４）热原试验；（５）体外细胞毒性试验。结果表明该材料安全无毒、无溶血性、对皮肤无剌激，不含热原物质，具有良好的细胞相容性，可广泛应用于临床。     

快速凝结复合羟基磷灰石陶瓷粉生物相容性评价：Ⅰ、性毒与细胞相容性研究

对自行研制的快速凝结复合羟基磷灰石陶瓷粉的毒性及细胞相容性进行研究，实验包括：（1）亚急性毒性实验；（2）溶血试验；（3）皮内试验；（4）热原试验；（5）体外细胞毒性试验。结果表明该材料安全无毒，无溶血性、对皮肤无刺激，不含热原物质，具有良好的细胞相容性，可广泛应用于临床。     

羟基磷灰石的生物学基础及临床应用

我院与华南理工大学共同研制了一种块状羟基磷灰石人工骨。在小白鼠体内进行了急性毒性试验，体外微量细胞毒性试验，溶血试验、兔皮下埋植试验及兔下颌骨埋植试验。结果证明该材料无毒性，不致敏，不引起炎症反应，具有良好的生物相容性，并能与软，硬组织形成紧密的结合。在１４例颌面整形的临床应用中取得满意的结果。     

纳米复合陶瓷材料的生物相容性研究

目的 通过体内、体外实验,对纳米羟基磷石复合40%二氧化锆材料进行早期生物相容性评价.方法 按照国家标准GB/T16886医疗器械生物学评价标准的要求,同时报据纳米羟基磷灰石复合40%二氧化锆材料的特定用途,选取样本进行如下生物学实验:致敏试验,溶血试验,刺激试验,肌肉植入试验.结论 经体内和体外试验结果显示:纳米羟基磷灰石复合40%二氧化锆材料无致敏、无刺激、无变形,具有良好的血液及生物相容性.     

羟基磷灰石的生物学基础及临床应用

我院与华南理工大学共同研制了一种块状羟基磷灰石人工骨（ＢＨＡＢ）。在小白鼠体内进行了急性毒性试验，体外微量细胞毒性试验，溶血试验。兔皮下埋值试验及兔下颌骨埋植试验。结果证明该材料无毒性，不致的，不引起炎症反应，具有良好的生物相容性，并能与软、硬组织形成紧密的结合。在１４例颌面整形的临床应用中取得满意的结果。     

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.