飞点扫描准分子激光原位角膜磨镶术后回退的再治疗

目的:评价使用飞点扫描技术的准分子激光原位角膜磨镶术(LASIK)治疗首次术后残余近视的疗效及安全性. 方法:对75例93眼LASIK术后残余近视的患者行二次LASIK手术,全部采用掀瓣的手术方式,两次手术间隔(7.2±3.6) mo. 术后平均随访超过6 mo. 采用配对t检验对数据进行统计学处理. 结果:二次LASIK术后平均裸眼视力较术前显著提高(P<0.01),术后裸眼视力与术前最佳矫正视力比较,差异无显著意义(P>0.05);术后6 mo时屈光度在±0.5D以内者为96.8%(90眼),有21.5%(20眼)的术后裸眼视力大于术前矫正视力. 无危及视力的并发症出现. 结论:使用飞点扫描技术的准分子激光设备行二次LASIK治疗残余近视安全、效果好.     

准分子激光角膜屈光手术矫治RK术后近视散光

目的:探讨准分子激光原位角膜磨镶术(LASIK)和准分子激光屈光性角膜切削术(PRK)矫治角膜放射状切开术(RK)后残余近视散光的安全性和有效性.方法:对接受RK手术4～15年,近视散光稳定2年以上的患者19例(38眼)分别行PRK和LASIK手术,其中PRK组8例(16眼),术前屈光度为:球镜-1.00～-5.25D,平均-3.12±0.87D,柱镜0～-2.25D,平均-1.27±0.36D,LASIK组11例(22眼),术前屈光度:球镜-1.50～-9.50D,平均-3.54±2.79D,柱镜0～-3.0D,平均-1.58±0.69D,术后随访12个月.结果:两组患者术后3个月时视力和屈光状态趋于稳定,术后6个月屈光度均在±0.75D以内,术后1年裸眼视力33眼(86.84)≥1.0,38眼(100%)≥0.8,未有最佳矫正视力下降.结论:LASIK和PRK矫治RK术后近视散光均安全、有效,PRK安全简便,LASIK稳定性和预测性更好.     

LASIK术后角膜神经支配的恢复:3年前瞻性纵向研究

目的:测量LA SIK术后3年内角膜神经分布的恢复情况。方法:11例患者的17例角膜行LASIK手术矫正近视,术前共聚焦显微镜检查近视度数-2.0D～-11.0D。分别于术后1、3、6、12、24、36个月,测量神经纤维束及其密度(每帧面积可见的神经长度)、方位(平均角度)及在角膜内的深度。结果:LASIK术后1个月>90%的角膜基底细胞层下的神经数量及密度减少。术后6个月时这些神经开始恢复,术后2年时的神经密度与术前无显著差异,在术后2～3年间神经密度再次减少,到第3年时剩余的数目不到术前的60%(P<0.001)。术后基质瓣的大部分神经纤维束也消失,第3个月…     

一次性90刀头联合分区切削治疗高度近视的临床观察

目的 探讨一次性90刀头联合分区切削的准分子激光原位角膜磨镶治疗高度近视的临床效果.方法 对欲行LASIK手术的20例(40只眼)近视病人用90刀头制作角膜瓣后再行分区切削,随访6个月.结果 术后第1天裸眼视力均达到或超过术前预期矫正视力;术后1个月裸眼视力≥术前矫正视力者36只眼(94.7%);术后半年裸眼视力仅3例5只眼下降1行,且矫正视力较术前无下降.结论 一次性90刀头联合多区切削LASIK手术可安全有效的治疗高度近视,最大限度的保留角膜基质床的厚度,防止医源性角膜扩张的发生.     

准分子激光原位角膜磨镶术治疗近视的临床研究

目的观察准分子激光原位角膜磨镶术(LASIK)治疗近视的临床疗效。方法对1 000只眼LASIK术前与术后的视力、屈光度进行比较、分析、随访。结果中低度组患者在术后随访6个月后视力1.04±0.22,屈光度 0.43±0.15,高度组视力0.84±0.36,屈光度0.25±0.76;超高度组视力0.54±0.76,屈光度-2.25±1.24。结论准分子激光原位角膜磨镶术(LASIK)具有安全、有效、稳定等特点,逐渐得到广大近视患者的接受,成为角膜屈光手术的主导术式。     

半飞秒准分子激光原位角膜磨镶术在近视手术治疗中的效果

目的:探究半飞秒准分子激光原位角膜磨镶术(LASIK)在近视激光手术治疗中的效果及对裸眼视力(UCVA)的影响.方法:选取我院2018年1月至2019年12月接受近视激光手术治疗患者94例,均实施半飞秒LASIK治疗,分析治疗效果及术前、术后UCVA水平.结果:术后24h患者治疗有效率与术后6个月有效率差异无统计学意义...     

准分子激光原位角膜磨镶术前后角膜厚度变化的研究

目的探讨准分子激光原位角膜磨镶术(LASIK)前、术后角膜厚度的变化,计算出每一个屈光度近视实际切削角膜的厚度,进行术前预算患者角膜厚度的足与不足,筛选患者。方法对200例(400只眼)行LASIK手术的患者术前及术后半年以上追踪观察角膜厚度的变化。结果200例LASIK后角膜中央厚度术后6个月趋于稳定,每一个屈光度近视实际切削角膜约13.20μm。结论LASIK原位角膜磨镶术治疗近视眼安全可靠。     

准分子激光原位角膜磨镶术治疗复性近视散光的疗效观察

目的探讨准分子激光原位角膜磨镶术(LASIK)治疗复性近视散光的有效性和预测性。方法采用LASIK手术对50例(90只眼)复性近视散光进行治疗。根据散光度大小分为二组:A组-2.25~-3.00 D,B组-3.25~-6.00 D。观察手术前后的视力和屈光度。结果A组术后平均散光度从术前(-2.51±0.68)D下降为(-0.51±0.22)D,B组术后的平均散光度从术前(-3.85±0.46)D下降为(-0.53±0.29)D,术后12个月时两组残留散光度差异无统计学意义(P>0.05)。两组术后的平均裸眼视力均好于术前矫正视力。结论LASIK手术治疗治疗复性近视散光,效果明显。     

准分子激光原位角膜磨削术治疗复性近视散光效果分析

目的 :探讨准分子激光原位角膜磨削术 (LASIK)治疗复性近视散光的有效性和预测性。方法 :采用LASIK对6 0例 (110只眼 )复性近视散光进行治疗。根据散光度大小分为二组 :A组 (- 2 2 5～ - 3 0 0 )D ;B组 (- 3 2 5～ -6 0 0D)。观察手术前后的视力和屈光度。结果 :A组术后平均散光度从术前 (- 2 5 1± 0 6 8)D下降为 (- 0 5 1± 0 2 5 )D。B组术后的平均散光度从术前 (- 3 85± 0 4 6 )D下降为 (- 0 5 2± 0 2 2 )D。术后 12个月时两组残留散光度无明显差别。两组术后的平均裸眼视力均好于术前矫正视力。结论 :LASIK治疗高度近视伴中高度散光 ,效果明显。     

准分子激光原位角膜磨镶术术后角膜后表面曲率半径变化

目的:探讨准分子激光原位角膜磨镶术(LASIK)术后角膜后表面曲率变化及与屈光等效球镜改变量的关系。方法:使用Pentacam眼前节测量分析系统,检测行近视LASIK手术的38例(76眼)患者术前、术后1个月、3个月和6个月的角膜后表面距离角膜顶点半径3mm区曲率半径,分析角膜后表面曲率半径变化及与等效球镜改变量的相关关系。结果:LASIK术后1个月、3个月与6个月的角膜中央3mm区后表面曲率半径分别为(6.29±0.19)mm、(6.28±0.19)mm和(6.27±0.19)mm,与术前比较差异有统计学意义(P<0.01)。角膜后表面曲率半径改变量与屈光等效球镜改变量呈正相关(r=0.314,P=0.009)。结论:LASIK术后角膜中央3mm区后表面曲率半径减少,变化程度与近视矫正程度相关。     

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.