亚急性重症乙型肝炎患者血浆纤维蛋白原与纤维蛋白单体聚合功能的测定及临床意义

为测定亚急性重症乙型肝炎患者血浆中纤维蛋白原的浓度与纤维蛋白单体聚合能力,以了解其凝血功能。用蕲蛇酶水解纤维蛋白原,用计算机测定其相关数值。发现20名亚急性重症乙型肝炎患者,其纤维蛋白聚合反应速率为(0.315±0.065)g/min;最大吸光度为(0.176±0.035)OD;纤维蛋白原浓度为(150±30)mg/dl;纤维蛋白单体聚合反应速率/最大吸光度比值为1.789±0.160;反应延滞时间为(-21±5)s。结果表明亚急性重症乙型肝炎患者的纤维蛋白原反应时间增快,但其它各项指标均下调,表明患者出血与凝血功能受损。     

慢性乙型肝炎纤维蛋白原系列测定及分析

目的 :探讨慢性乙型肝炎患者血浆中纤维蛋白原 (Fibrinogen,Fbg)水平与功能变化的临床意义。方法 :用蕲蛇酶水解纤维蛋白原 ,以计算机测定其相关数值。结果 :慢性乙型肝炎患者 30例 ,其纤维蛋白聚合反应速率为 (0 .35 5±0 .93) g/ m in;最大吸光度为 (0 .1 86± 0 .0 39) OD;纤维蛋白原浓度为 (1 .92± 0 .4 1 ) g/ L,反应延滞时间为 (9± 5 ) s。结论 :慢性乙型肝炎患者除 Fbg下降外 ,还有功能反应受抑     

晚期肺癌和肺部良性疾病患者血浆纤维蛋白原水平与功能的研究

目的观察晚期肺癌及慢性支气管炎、肺气肿等良性肺部疾病患者血浆纤维蛋白原水平与功能.方法用蕲蛇毒水解纤维蛋白原,采取计算机自动检测系统测定.结果40例晚期肺癌患者和40例良性肺部疾病患者纤维蛋白单体聚合反应速率(FMPV)分别为0.910±0.178及0.783±0.220,最大吸光度(Amax)分别为0.468±0.098及0.397±0.113,凝固性纤维蛋白原含量(S)分别为5.79±1.75g/L及4.76±1.85g/L,均显著高于正常对照组(P＜0.01),而肺癌组与肺部良性疾病组相比有显著性差异(P＜0.05).反应延滞时间(DT)为15±13s及21±12s,纤维蛋白原功能与量的比值(FMPv/Amax)为1.953及1.973,低于正常对照组.结论晚期肺癌和肺部良性疾病患者血浆纤维蛋白原水平与功能均高于正常对照,两组间差异有显著性.本研究表明晚期肺癌患者机体处于高凝状态,有血栓形成趋势.     

胰岛素缓释载体聚乙二醇-聚己内酯-聚甲基丙烯酸-N,N-二乙氨基乙酯的制备及评价

目的 制备pH敏感聚乙二醇-聚己内酯-聚甲基丙烯酸-N,N-二乙氨基乙酯(mPEG-PCL-PDEAEMA)载胰岛素缓释纳米粒,考察其体外释放效果和体内降糖活性.方法 结合开环聚合反应和原子转移自由基聚合反应合成具有不同疏水链段的mPEG-PCL-PDEAEMA,用傅里叶红外光谱和核磁共振氢谱表征其结构;采用纳米沉淀技术制备聚合物载胰岛素纳米粒,动态光散射法测定粒径,透射电子显微镜观察其形态;BCA法测定载药情况,并考察其体外释放行为;建立糖尿病大鼠模型,监测给药后血糖水平.结果 在pH1.2~7.4时,聚合物纳米粒的粒径随pH增大而减小.以90%wt投药比制备mPEG5k-PCL13k-PDEAEMA10k和mPEG5k-PCL10k-PDEAEMA10k载胰岛素纳米粒时的包封率和载药率为最佳,包封率分别为(81.99±1.77)%和(53.12±0.62)%,载药率分别为(42.46±0.53)%和(32.34±0.26)%,粒径分别为181.9±6.67 nm和169±7.1 nm.体外释放结果显示聚合物载胰岛素纳米粒具有出色的缓释行为,并且随着疏水链段的增长,药物释放速度减慢.体内药效实验表明mPEG5k-PCL13k-PDEAEMA10k载胰岛素纳米粒能够在体内保持48 h的降血糖效果,较游离胰岛素的降糖作用时间明显延长.结论 pH敏感三嵌段聚合物mPEG-PCL-PDEAEMA有望成为理想的胰岛素缓释载体.     

铜-二正丁胺络合体系催化的2,6-二甲基苯酚聚合反应研究

采用间歇溶液聚合法制备了聚苯醚(PPO),对铜-二正丁胺络合体系催化的2,6-二甲基苯酚聚合反应进行了研究。探讨了络合反应对催化剂活性的影响,优化了二正丁胺用量以及单体的浓度和滴加速度。实验表明聚合反应适宜的条件是:温度为(32±2)℃,聚合反应时间为2.5-3.0h。     

探讨血浆纤维蛋白原单体聚合功能在妊高征中的临床意义

目的 :研究妊高征患者血浆纤维蛋白原单体聚合功能的临床意义。方法 :用蕲蛇酶 (Acutulase)水解纤维蛋白原 ,采用计算机自动检测系统对 70例正常晚期妊娠妇女和 6 0例妊高征患者进行定量检测。结果 :轻度妊高征组的血浆纤维蛋白原单体聚合反应速率 (FMPV)、血浆凝固性纤维蛋白原含量 (S)和最大吸光度 (Amax)分别为 0 77± 0 .10 ,(45 2 .33± 85 .96 )mg/dL ,0 .4 0± 0 .0 5 ,明显高于对照组 [0 .6 6± 0 .15 ,(370 .89± 112 .2 0 )mg/dL ,0 .35± 0 .0 8],差异有显著性 (P <0 .0 5 ) ;重度妊高征组分别为 0 .5 7± 0 .14 ,(30 8.4 5± 93.97)mg/mL ,0 .30± 0 .0 8,明显低于对照组 (P <0 .0 5 ) ,且显著低于轻度妊高征组 (P≤ 0 .0 0 1)。结论 :应用计算机自动检测系统动态监测纤维蛋白原单体聚合功能 ,对妊高征的凝血功能状态及并发症的判断及指导治疗 ,具有一定的临床价值。     

经内镜鼻胰管引流在重症急性胰腺炎治疗中的应用

目的 :初步总结经内镜鼻胰管引流在重症急性胰腺炎治疗中应用的疗效。　方法 :自 1998年 3月以来 ,在重症急性胰腺炎患者入院后常规非手术监测治疗的同时 ,随机床旁行经内镜置放鼻胰管引流 14例。其中明确合并胆结石 8例。观察每天胰管引流量和入院后第 5天在体温、心率、白细胞计数、血糖、血钙、动脉氧分压和血、尿淀粉酶的变化 ,并与第 1天比较 ,记录治疗结果和住院时间。　结果 :经鼻胰管引流时间为 (7.3± 4 .0 )天 ,前 5天的胰液引流量分别为每天 (2 36 .4± 176 .6 )、(2 87.1± 16 4 .7)、(2 84 .6± 2 16 .4 )、(435 .0± 35 7.8)ml和 (377.8± 2 2 3.8)ml。入院后第 1天和第 5天的体温为 (38.2± 0 .6 )和 (37.2± 0 .8)℃ (P <0 .0 1)、心率为 (10 2 .3± 17.0 )和 (82 .9± 14 .5 )次 /min(P <0 .0 1) ,白细胞计数为 (14 .6± 4 .2 )和 (10 .1± 5 .4 )× 10 9/L(P <0 .0 5 ) ,血糖为 (10 .0± 4 .9)和 (8.6± 3.3)mmol/L(P >0 .0 5 ) ,血钙为 (2 .1± 0 .2 )和 (2 .2± 0 .2 )mmol/L(P >0 .0 5 )　动脉氧分压为 (78.0± 16 .3)和 (113.0± 4 1.6 )mmHg(P <0 .0 1) ,血淀粉酶为 (6 95 .7± 4 4 5 .2 )和 (82 .6± 4 7.1)U/L(P <0 .0 1) ,尿淀粉酶为 (3174 .1± 2 5 4 2 .5 )和(2 86 .8± 2     

先天性心脏病肺动脉高压心内直视手术患者吸入NO对再灌注肺功能的影响

目的　评价先天性心脏病合并肺动脉高压患者吸入一氧化氮 (NO)对再灌注肺功能的影响 .方法　先天性心脏病合并中重度肺动脉患者 4 4例 ,分为对照组 (2 2例 )和吸入NO组 (2 2例 ) .吸入 NO组在升主动脉开放即刻连续吸入NO2 0 m L· L- 1 2 4 h,监测和计算平均动脉压 (m Bp)、平均肺动脉压 (m PA)、肺血管阻力 (PVR)、心排出量 (CO) ;氧分压(Po2 )、二氧化碳分压 (Pco2 )、肺泡动脉氧分压差 (A- a Do2 )、肺内动静脉分流 (Qs/ Qt) .结果　吸入 NO组 m PA肺再灌注后3,6 ,12 ,2 4 h分别为 (5 .8± 1.9) ,(5 .6± 1.6 ) ,(5 .1± 1.3)和 (4.4± 1.1) k Pa,对照组为 (7.8± 1.6 ) ,(7.3± 1.7) ,(6 .8± 1.5 )和 (6 .9± 1.5 ) k Pa,吸入 NO组下降显著 (P<0 .0 5 ) ;吸入 NO组 m PVR肺再灌注后 3,6 ,12 ,2 4 h分别为(87± 17) ,(79± 12 ) ,(6 7± 9)和 (6 0± 9) k Pa· s· L- 1 ,对照组为 (14 5± 2 2 ) ,(135± 16 ) ,(130± 14 )和 (114± 11) k Pa· s- 1·L- 1 ,吸入 NO组下降明显 (P<0 .0 5 ) ;吸入 NO组肺再灌注后 6 ,12 ,2 4 h分别为 (4.2± 1.2 ) ,(4.5± 0 .9)和 (4.4± 1.2 )L· min- 1 ,对照组为 (3.3± 0 .8) ,(3.4± 0 .8)和 (3.5± 0 .9)L· min- 1 ,吸入 NO组明显升高 (P<0 .0 5 ) .与对照     

血浆纤维蛋白原单体聚合功能与水平在正常孕妇血浆中的变化

目的 :建立广州地区正常孕妇血浆纤维蛋白原水平及纤维蛋白单体聚合功能的正常参考值。方法 :用蕲蛇酶 (Acutulase)水解纤维蛋白 ,用计算机自动检测系统测定。结果 :(1 )纤维蛋白单体聚合反应速率 (FMPV) :中孕组 0 .6 6 5± 0 .1 2 4 ,晚孕组 0 .71 0± 0 .1 5 9,产后组 1 .1 2 2± 0 .32 3,随孕周增加呈增高趋势 ,孕期与产后组比较差异有极显著性P <0 .0 0 1 ;(2 )最大吸光度 (Amax) :中孕组 0 .341± 0 .0 71 ,晚孕组 0 .36 7± 0 .0 84 ,产后组 0 .4 99± 0 .1 0 0 ,随孕周增加呈增高趋势 ,孕期与产后组比较差异有极显著性P <0 .0 0 1 ;(3)纤维蛋白原浓度 (S) :中孕组 36 7.8± 96 2 ,晚孕组 4 2 0± 1 1 9.6 ,产后组 835 .0± 4 92 .7,随孕周增加呈增高趋势 ,孕期与产后组比较差异有极显著性P <0 0 0 1 ;(4 )反应延滞时间 (DT) :中孕组 1 0 .5± 1 0 .3,晚孕组 1 5 .3± 1 2 .3,产后组 5 5 .6± 32 .7,随孕周增加呈增高趋势 ,孕期与产后组比较差异有极显著性P <0 .0 1 ;(5 )功能指标 (FMPV/Amax) :中孕组 1 .86 5 ,晚孕组 1 .977,产后组 2 1 6 7,随孕周增加呈增高趋势 ,孕期与产后组比较差异有显著性 (P <0 .0 1及P <0 .0 5 )。结论 :计算机自动检测系统操作简便、快捷 ,测出的纤维蛋白原浓度 ,     

颅中窝径路解剖定位的临床意义

目的　为颅中窝入路手术提供相应的解剖学依据 .方法　对 2 0具甲醛固定的成人尸颅进行测量 ,确定翼点、颧弓点至颅中窝各结构及面神经管裂孔至弓状隆起、内耳门、棘孔的夹角和距离 .结果　翼点至圆孔、卵圆孔、棘孔、三叉神经压迹、面神经管裂孔、弓状隆起、内耳门的连线长度和各连线与正中矢状面成角分别为 (5 8.0± 3.7) mm(71.5± 6 .4 )°,(5 9.9± 3.9) mm (5 6 .2± 6 .4 )°,(5 9.2± 3.8) mm (49.2±6 . 8)°,(6 3.0± 3.8) mm (5 2 .8± 6 .7)°,(5 9.6± 3.6 ) mm(41.0± 5 .4 )°,(6 2 .9± 4 .7) mm(2 7.3± 5 .6 )°,(6 9.5± 4 .1)mm (40 .3± 5 .1)°.颧弓点至圆孔、卵圆孔、棘孔、三叉神经压迹、面神经管裂孔、弓状隆起、内耳门的连线长度和各连线与正中矢状面成角分别为 (5 2 .4± 3.0 ) mm (90 .2± 5 .6 )°,(48.5± 3.9) mm (74 .4± 6 .1)°,(44 .4± 2 .6 ) mm (6 5 .9±5 .8)°,(5 3.7± 3.4 ) mm (6 6 .3± 5 .9)°,(47.0± 2 .6 ) mm(5 4 .6± 7.2 )°,(5 4 .1± 3.3) mm(40 .7± 5 .8)°,(6 0 .1± 2 .8)mm (5 3.4± 5 .9)°.面神经管裂孔至弓状隆起、内耳门、棘孔的连线长度和各连线与正中矢状面成角分别为 (17.5± 2 .8)mm(337.2± 9.2 )°,(14 .5± 1.2 ) mm(44 .3± 12     

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.