准分子激光原位角膜磨镶术治疗近视并发症

目的　分析准分子激光原位角膜磨镶术 (LASIK)治疗近视的并发症 ,探讨其发生的原因、预防和处理措施。方法　 72 3例 ( 1390只眼 )近视患者 ( - 1 5 0～ - 2 2 0 0D)行LASIK术后随访 12个月 ,观察其术中、术后并发症。结果　术中角膜瓣形成不全 5只眼 ( 0 36 % ) ,角膜瓣过薄 4只眼( 0 2 9% ) ,角膜瓣游离 6只眼 ( 0 4 3% ) ,角膜瓣层间异物残留 12只眼 ( 0 86 % ) ,屈光回退 >1 0D者 2 0只眼 ( 1 4 4 % ) ,激素性高眼压 16只眼 ( 1 15 % ) ,眩光和夜驶困难 2 4只眼( 1 73% )。结论　LASIK治疗近视安全、有效 ,但仍存在一定的并发症 ,必须引起重视 ,提高手术技巧和完善手术设计有助于进一步减少手术并发症的发生和提高手术的预测性和准确性     

准分子激光原位角膜磨镶术治疗超高度近视的疗效分析

目的 :探讨准分子激光原位角膜磨镶术 (LASIK)矫治超高度近视 (- 10D以上近视 )的准确性和预测性。方法 :通过对 5 6例 (共 10 5眼 )术前屈光度 (等值球镜 ) - 10 0 0～ 2 6 0 0DS ,平均 13 4± 3 9DS近视患者采用LASIK治疗 ,随访一年。结果 :术后 1个月时裸眼视力达到术前矫正视力的为 81眼 ,占总眼数的 77 1% ;术后 6个月裸眼视力高于或等于术前的为 96只眼 ,占总眼数的 91 4 % ;其中高于术前的为 2 6眼 ,占总眼数的 2 4 8% ;而裸眼视力下降 1行以上的 6眼 ,占 5 8% ;其中 3例为不规则散光 ,2例角膜瓣制作不全 ,1例为角膜瓣层间脂类物残留 ,裸眼视力下降 2行以上的为 3眼 ,占总眼数的 2 9%。结论 :LASIK手术治疗高度近视具有较好的安全性及预测性 ,但手术操作及手术适应症的选择仍需谨慎从之。     

LASIK治疗近视的并发症临床分析

目的分析准分子激光角膜原位磨镶术(LASIK)治疗近视的并发症及处理.探讨其发生原因及预防措施.方法 2 035例(3 984只眼)近视患者(-1.50～-27.00D),术后随访1、7d 1、3、6、12、24个月,观察及分析其并发症.结果术中角膜瓣游离2只眼(0.05%);角膜瓣小、游离并偏位1只眼(0.025%);角膜瓣形成不全5只眼(0.12%);角膜层间异物16只眼(0.40%);明显偏中心1只眼(0.025%).术后角膜瓣融解1只眼(0.025%);角膜瓣移位、皱折10只眼(0.25%);角膜瓣下感染16只眼(0.40%);角膜瓣下上皮植入4只眼(0.10%);屈光过矫3只眼(0.075%);屈光欠矫26只眼(0.65%);眼底病变4只眼(0.10%). 结论 LASIK治疗近视安全、有效,但存在一定的并发症,应引起重枧,手术技巧的提高、手术设计的完善和手术设备的改进以及有效及时处理各种并发症是保证手术成功的关键.     

准分子激光上皮瓣下角膜磨镶术和准分子激光原位角膜磨镶术治疗近视疗效观察

目的评价准分子激光上皮瓣下角膜磨镶术（LASEK）和准分子激光原位角膜磨镶术（LASIK）对近视散光的治疗效果。方法采用美国VISXSTARs4型准分子激光系统对296例（538只眼）近视散光患者进行治疗,其中LASEK组近视度数在-1．0D～-10．0D,共119只眼;LASIK组近视度数在-1．0D～-16．0D,共419只眼;二组患者散光度数均在-0．5D～-5．0D。结果术后视力：二组患者均随访1年以上,LASEK组视力均≥0．5,其中92．18％的患者≥0．8;LASIK组视力均≥0．5,其中91．87％的患者≥0．8。结论LASEK和LASIK治疗近视散光安奎有效。     

小光斑飞点扫描式准分子激光LASIK治疗近视眼的疗效

目的　探讨小光斑飞点扫描式准分子激光LASIK治疗近视的临床效果。方法　将 892例 (172 4只眼 )按屈光度分为A组 (<- 6 0 0D) 5 4 8例 (10 5 3只眼 ) ,B组 (- 6 2 5～ - 10 0 0D) 2 85例 (5 6 2只眼 ) ,C组(>- 10 2 5D) 5 9例 (10 9只眼 ) 3组 ,采用德国SCHWIND小光斑飞点扫描式准分子激光仪进行LASIK治疗。随访 3～ 12个月 ,观察术后视力、屈光度和并发症等情况。结果　A ,B ,C 3组的术后裸眼视力≥ 1 0者 ,术后 1天分别为89 6 % (94 3/ 10 5 3) ,78 3% (4 4 0 / 5 6 2 )和 37 6 % (4 1/ 10 9) ;术后 3个月时分别为 95 4 % (10 0 5 / 10 5 3) ,88 1%(4 95 / 5 6 2 )和 4 8 6 % (5 3/ 10 9)。A组视力恢复最好 (P <0 0 1)。术后屈光度在± 1 0 0D以内者 ,术后 1天时分别为91 2 % (96 0 / 10 5 3) ,90 0 % (5 0 6 / 5 6 2 ) ,86 2 % (94 / 10 9) ;3个月为 92 5 % (974 / 10 5 3) ,91 3% (5 13/ 5 6 2 ) ,89 0 %(97/ 10 9)。 3组的屈光度恢复情况相当 (P >0 0 5 )。主要的并发症有 :偏中心切削 3只眼 (均出现在C组 ) ,角膜瓣形成不全 3只眼 ,瓣位置偏离 5只眼 ,角膜上皮植入 5只眼 ,眩光 15只眼。结论　小光斑飞点扫描式准分子激光机型在LASIK手术中起着重要的作用 ,而良好的角膜板层刀和丰富的     

小光斑飞点扫描准分子激光治疗近视的疗效观察

目的 :了解小光斑飞点扫描准分子激光联合红外线制导眼球主动跟踪系统行近视 L ASIK治疗的效果及安全性。方法 :使用 WAVEL IGHT公司 AL L EGRETTO鹰视准分子激光系统及法国 MORIA- 2角膜板层刀对 16 30例 (3174眼 )近视患者行L ASIK治疗。结果 :术前屈光度 - 0 .75～ - 9.0 0 DS[(- 4 .0 9± 1.35 ) DS]2 96 2眼 ,术后 6个月裸眼视力 (UCVA) 98.8%达 0 .8以上 ,92 .4 %达 1.0以上 ,术前屈光度 - 9.2 5～ - 19.75 DS[(- 9.4 5± 3.6 6 ) DS]共 2 12眼 ,术后 6个月裸眼视力 75 .9%达 0 .8以上 ,5 2 .8%达 1.0以上。实际矫正度在预期矫正度± 0 .5 D范围内占 90 .7% ,± 1.0 0 D范围内占 97.4 %。术后出现屈光回退 33眼 (1.0 4 % )。主要并发症 :术中角膜上皮部分松脱 7眼 ,术后角膜瓣翻转移位 1眼 ,术后角膜上皮植入 5眼。未发现偏心切削、中央岛及不规则散光现象。结论 :小光斑飞点扫描准分子激光系统联合红外线制导眼球自动跟踪治疗近视安全、可靠 ,精确度高 ,可预测性强 ,值得推广应用。     

准分子激光治疗近视散光的疗效观察

目的 :评价准分子激光角膜切削术 (PRK)及准分子激光原位角膜磨镶术 (LASIK)对近视散光的治疗效果。方法 :采用美国SCAN - 195型准分子激光系统对 74例 (138只眼 )近视散光的患者进行治疗 ,PRK组近视度数在 - 1 0 0～ - 5 0 0D ,散光度数在 - 0 5 0～ - 3 0 0D之间的患者 ,共 6 1只眼 ;LASIK组为近视度数大于 - 5 0 0D伴散光者或散光度数大于 - 3 0 0D的患者 ,共 77只眼。结果 :术后视力 :所有病例均随访 1a以上 ,PRK组视力均≥ 0 5 ,其中 91 98%的患者≥ 0 8;LASIK组视力均≥0 5 ,其中 90 12 %的患者≥ 0 8。结论 :PRK和LASIK治疗近视散光是安全、有效并且可行     

Q值引导的SBK与薄瓣LASIK治疗近视及散光的疗效比较

目的 探讨前弹力层下切削(SBK)与薄瓣准分子激光原位角膜磨镶术(LASIK)治疗近视及散光的安全性、预测性和有效性. 方法 收集接受SBK手术46例(91眼)为SBK组,球镜(-5.16 ± 1.37)D(-1.5~ -9 D),柱镜(-0.72 ± 0.45)D(0~ -2.5 D);接受薄瓣LASIK手术46例(92眼)为薄瓣LASIK组,球镜(-5.60 ± 1.59)D (-1.5~ -10 D),柱镜(-1.38 ± 0.68)D(0~ -4.5 D).采用OU P-ONE角膜板层刀和M2110刀头,比较2组角膜瓣厚度、术后裸眼视力、屈光度及并发症. 结果 2组患者左眼角膜瓣厚度均明显小于右眼;薄瓣组患者的左、右眼和双眼角膜瓣厚度均明显大于SBK组(P<0.01),且变异较大.SBK组、薄瓣组术后3月内裸眼视力均明显优于术前裸眼视力,2组术后不同时期祼眼视力达到或超过术前最佳矫正视力的比例均无显著差异.SBK组、薄瓣组术后干眼症状发生率分别为21.7% 及23.9%. 结论 SBK及薄瓣LASIK矫正近视及散光安全有效,Q值引导下依据患者角膜形态、厚度及散光方向个性化选择术式可以提高手术的预测性.     

小光斑飞点扫描准分子激光治疗近视的临床观察

目的:评价小光斑飞点扫描准分子激光系统用于LASIK手术治疗近视的疗效。方法:采用鹰视ALLEGRTTOWAVEFRONT准分子激光扫描仪及法国MORIACB角膜切削刀为2 0 2例、396眼行准分子激光治疗。屈光度为- 0 .75D～- 14 .5 0D。随访术后超过3个月的患者。观察分析视力及屈光度的变化。结果:术后第1天裸眼视力在0 .5、0 .8、1.0以上者分别为98.9% (392眼)、90 .4 % (35 8眼)、75 % (2 97眼)。术后第1、3月裸眼视力>1.0的分别为88.1% (349眼)、91.9% (36 4眼)。无严重术后并发症发生。结论:小光斑飞点扫描准分子激光系统行LASIK手术治疗近视的临床效果较好,大大减少了手术并发症的发生率     

准分子激光原位角膜磨镶术后屈光的动态研究

目的　探讨准分子激光原位角膜磨镶术 (laserinsitiukeratomileusis ,LASIK)后屈光度数回退的原因。方法　将 2 0 1例 (386眼 )近视患者 (- 1 .2 5～ - 2 0 .0 0D)按屈光度数分为A组 2 1 8眼 (- 1 .2 5～ - 6 .0 0D)和B组 1 6 8眼 (- 6 .2 5～ - 2 0 .0 0D)行LASIK ,记录术前、术后视力、屈光度数、角膜厚度和角膜激光切削区直径 ,并进行统计学分析。结果　(1 )A组 :正常术眼 :术后屈光度数 <- 1 .0 0D 1 95眼 (89.4 5 % ) ,术前平均角膜厚度 (5 4 9.5± 31 .5 ) μm ,术中平均激光切削直径为 (4 .96± 0 .35 )mm ;回退术眼 :术后屈光度数≥ - 1 .0 0D 2 3眼 (1 0 .5 5 % ) ,术前平均角膜厚度 (5 4 7.5± 37.0 ) μm ,与正常术眼比较差异无显著意义 (P >0 .0 1 ) ;(2 )B组 :正常术眼 1 0 5眼 (6 2 .5 % ) ,术前平均角膜厚度为 (5 6 0 .9± 30 .9) μm ,术中平均激光切削直径为 (4 .5 1± 0 .2 8)mm ,术后回退术眼 77眼 (4 5 .83% ) ,术前平均角膜厚度为 (5 38.0± 31 .0 ) μm ,与A组比较差异有非常显著意义 (P <0 .0 1 ) ;术后平均屈光度数为 - 1 .99± 1 .0 1D。结论　LASIK可有效治疗 - 6 .0 0～ -1 5 .0 0D的近视。术中激光切削直径小者和高度近视术前角膜厚度薄者术后易出现屈光度数回退     

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.