肉牛胚胎移植技术应用研究

1998— 2 0 0 0年通过对 1 3头西门塔尔牛进行FSH—PG法超排处理 ,超排有效头数 1 0头 ,平均获可用胚 7.8枚 /头 ;探索了在不同营养条件下移植妊娠率 ,说明注射营养药对妊娠率有显著影响 (P <0 .0 1 ) ;比较了经产牛与育成牛的移植妊娠率 ,育成牛显著高于经产牛 (P <0 .0 1 ) ;分析了一次PG与二次PG注射法对受体牛同期发情的影响 ,表明二次PG注射法高于一次注射法 (P <0 .0 5)。对冻胚与鲜胚移植效果进行比较 ,对影响移植效果的因素进行分析 ,从而对大规模地实施牛的ET计划提供了科学参考依据     

辽宁绒山羊同期发情效果的研究

将45只辽宁绒山羊平均分为3个组:A、B、C,按如下程序进行同期发情处理,A:CIDR PMSG FSH PG(CIDR埋植12d);B:CIDR FSH PG(CIDR埋植12d);C:CIDR PMSG FSH PG(CIDR埋植16d)。结果表明:(1)超排时加注250IUPMSG撤栓后48h内的同期发情率显著提高(试验组A:86.7%VS试验组B:73.3%,P<0.05);(2)撤栓后48h内的同期发情率埋栓16d组高于埋栓12d组,但两组间差异不显著(试验组A:86.7%VS试验组C:93.3%,P>0.05)。     

山羊用CIDR+FSH超数排卵处理的效果与卵母细胞成熟情况观察

本试验于 2 0 0 2年 10月在塔城地区种羊场进行。主要是利用CIDR +FSH对山羊进行同期发情、超排处理。试验结果得出FSH不同剂量两组的发情率均为 10 0 % ,发情时间集中在CIDR撤除后 12～ 2 4h内 ,超数排卵效果、卵母细胞回收率差异显著 (P <0 .0 5 ) ,两组间卵母细胞体内成熟时间无显著差异。     

不同FSH处理方法对多浪羊同期发情效果的影响

为了研究FSH不同注射方法对多浪羊繁殖性能的影响,试验将172只多浪羊母羊随机分为A、B、C三个试验组和一个对照组D,在相同饲养条件下,采用阴道放置海绵栓,第11 d撤栓时注射相同剂量的孕马血清促性腺激素(PMSG)和氯前列烯醇(PG)进行同期发情处理,埋栓后第9 d,150 IU FSH按照不同注射方法对A、B、C组进行处理。结果表明:A组(150 IU)发情率为77.78%,B组(100 IU+50 IU)发情率为80.65%,C组(75 IU+75 IU)发情率为87.50%,对照D组发情率为80.36%,统计分析3个试验组和对照组之间的发情率差异不显著(P>0.05),说明多浪羊采用孕酮+PMSG+PG同期发情处理及FSH不同的注射方法对发情率没有显著的影响,但C组(75 IU+75 IU)发情率高于其他组。     

山羊的超排处理及影响因素的研究

本试验比较了FSH的剂量、供体羊的年龄与经产情况、不同季节及环境条件对奶山羊超数排卵效果的影响。从统计分析可以看出 ,不同批号的FSH超数排卵用的剂量不完全相同 ,并且同一批号的FSH剂量在其一定的剂量范围内变化时 ,对本地山羊和奶山羊的超数排卵效果影响不显著 (P >0 .0 5) ;经产羊做供体的超排效果明显好于青年羊 (P <0 .0 5) ;在供体羊体况良好的情况下 ,经合适的同期化及超排处理 ,春季山羊的超排效果并不比秋季差 ;塔城本地山羊与奶山羊在呼图壁的超数排卵效果无明显差异 (P >0 .0 5) ,而与奶山羊在塔城的超数排卵效果有显著差异 (P <0 .0 5) ,并且 ,同一批奶山羊在塔城地区种羊场和在呼图壁种牛场分别进行超数排卵处理 ,结果排卵效果有极显著的差异 (P <0 .0 1 ) ,这主要是由于塔城地区 1 0月份气温比呼图壁的气温偏低 ,从而影响了奶山羊的超数排卵效果     

东北马鹿同期发情技术的研究

试验采用三种发情方案对东北马鹿进行同期发情处理,第一组,采用自制海绵栓加PMSG法处理;第二组,采用新西兰进口CIDR PMSG法处理;第三组,采用PG PG PMSG法处理。本试验中,三种方法处理后的同期发情率,自制海绵栓组为81.8%(36/44)、进口叉栓组92%(46/50)、PG PG组42.1%(8/19),两阴道栓组之间差异不显著(P>0.05),两阴道栓组极显著高于PG PG组。     

羊生产性胚胎移植的组织与技术程序

从生产实际出发 ,系统论述了羊生产性胚胎移植的组织及技术程序。主要包括 :胚胎移植条件的准备 ;生产场技术助手的培训 ;选择适宜的供、受体羊 ,并加强饲养管理 ;在适宜的季节 ,用宁波激素厂促卵泡素 (FSH) 2 50～ 30 0IU(绵羊 )和 30 0～350IU(山羊 ) ,或用中科院动物所FSH 7.5mg(绵羊 )和 9～ 1 2mg(山羊 ) ,以减量法进行供体超排 ;供、受体比例为 1 :8～ 1 2 ;用炔诺酮阴道栓配合促性腺激素 ,或用氯前列烯醇 (PG)进行受体同期发情处理 ;从供体子宫角手术回收的桑椹胚～早期囊胚 ,移植于受体羊子宫角 ;完整的记录体系     

内蒙古白绒山羊超数排卵及鲜胚移植技术的应用研究

本试验以 138、15 0和 162IU三种剂量FSH ,在供体羊发情的第 15、16、17d开始超排 ,34只供体羊的超排结果为排卵点平均 13.4 1± 6.70个 /只 ;胚胎平均回收 12 .5 6± 6.30枚 /只 ;可用胚胎平均 10 .2 4± 6.14枚 /只。第 16、17d起 ,剂量为 15 0IU组的超排效果最好 ,但无显著差异 (P >0 .0 5 )。将 2 69枚胚胎移植给 2 4 9只受体 ,妊娠率为 70 .2 8% ;产羔率为 67.0 6% ;共产 178只羔羊。受体羊与供体羊发情同期化程度、黄体质量、胚龄等因素对妊娠率影响较大 ,但统计学上无显著差异 (P >0 .0 5 )。用氯前列烯醇诱导发情不影响受体妊娠率     

供体母牛超数排卵在荷斯坦奶牛育种中的应用效果及影响因素分析

MOET核心群的 1 30头优秀荷斯坦个体母牛 ,1 44个胎次用高活性纯化促卵泡素超排处理 31 0头次 ,超排成功率为 89.6 8% ( 2 78/31 0 )。头次平均可用胚胎数为6 .38枚 ( 1 774/2 78)。记录资料建立数据库后用SAS软件统计处理。对 1 8个因素的分析结果表明 ,胎次、超排季节、促卵泡素剂量和操作人员对结果有显著影响(P <0 .0 1或P <0 .0 5) ;而个体母牛的产后间隔、产后发情次数、产奶性能和超排处理的年度、重复超排的次数、重复超排的间隔、公牛个体、输精次数和输精量无显著影响(P >0 .0 5)。结果表明使用适量的纯化促卵泡素 ,供体牛排卵数 (黄体数 )越多 ,采卵数和可用胚胎数就越多 ,妊娠数和犊牛数也越多。改进的超排处理方案与常规方法的可用胚胎数分别为 7.79与 5.58,显著改进了超排效果     

小鼠早期桑椹胚和致密桑椹胚玻璃化冷冻保存试验

超排处理 152只昆明小白鼠 ,把出现阴道栓的 10 1只小白鼠进行冲卵 ,得到 932枚胚胎。在室温 (2 2℃ )下 ,利用不同浓度的EFS玻璃化液 ,从中选用 4 6 5枚桑椹胚进行一步法冷冻 ,选用4 0 1枚桑椹胚进行两步法冷冻。结果是胚胎在 10 %EG(乙二醇 )溶液中预先处理 5分钟 ,再移入事先配置好含有EFS30的 0 .2 5ml塑料细管中 ,平衡 2分种后直接投入液氮中冷冻 ,胚胎解冻后获得的发育率最高 (97.3% )。致密桑椹胚的发育率比早期桑椹胚好。两步法与一步法玻璃化冷冻保存相比差异不显著 (P >0 .0 5)。     

Knee injury and Osteoarthritis Outcome Score (KOOS) - validation of a Swedish version

The Knee injury and Osteoarthritis Outcome Score (KOOS) is a self-administered instrument measuring outcome after knee injury at impairment, disability, and handicap level in five subscales. Reliability, validity, and responsiveness of a Swedish version was assessed in 142 patients who underwent arthroscopy because of injury to the menisci, anterior cruciate ligament, or cartilage of the knee. The clinimetric properties were found to be good and comparable to the American version of the KOOS. Comparison to the Short Form-36 and the Lysholm knee scoring scale revealed expected correlations and construct validity. Item by item, symptoms and functional limitations were compared between diagnostic groups. High responsiveness was found three months after arthroscopic partial meniscectomy for all subscales but Activities of Daily Living.     

Endovascular management of carotid-cavernous fistulas

Objective To investigate endovascular treatment of traumatic direct carotid-cavernous fistulas （CCF） and their complications such as pseudoaneurysms. Methods： Over a five-year period, 22 patients with traumatic direct CCFs were treated endovascularly in our institution. Thirteen patients were treated once with the result of CCF occluded, 8 twice and 1 three times. Treatment modalities included balloon occlusion of the CCF, sacrifice of the ipsilateral internal carotid artery with detachable balloon, coll embolization of the cavernous sinus and secondary pseudoaneurysms, and covered-stem management of the pseudoaneurysms. Results All the direct CCFs were successfully managed endovascularly. Four patients developed a pseudoaneurysm after the occlusion of the CCF with an incidence of pseudoaneurysm formation of 18.2% （4/22）. A total number of 8 patients experienced permanent occlusion of the ICA with a rate of ICA occlusion reaching 36.4% （8/22）. Followed up through telephone consultation from 6 months to 5 years, all did well with no recurrence of CCF symptoms and signs. Conclusion Traumatic direct CCFs can be successfully managed with endovascular means. The pseudoaneurysms secondary to the occlusion of the CCFs can be occluded with stent-assisted coiling and implantation of covered stents.     

The role of interventional radiology in trauma

Introduction Interventional Radiology has evolved into a specialty having enormous input into the care of the traumatized patient.In all hospitals,regardless of size,the Interventional Radiologist must consider their relationships with the trauma service in order to     

Diagnóstico ecográfico del neumotórax

The ultrasonographic diagnosis of pneumothorax is based on the analysis of artifacts. It is possible to confirm or rule out pneumothorax by combining the following signs: lung sliding, the A and B lines, and the lung point. One fundamental advantage of lung ultrasonography is its easy access in any critical situation, especially in patients in the intensive care unit. For this reason, chest ultrasonography can be used as an alternative to plain-film X-rays and computed tomography in critical patients and in patients with normal plain films in whom pneumothorax is strongly suspected, as well as to evaluate the extent of the pneumothorax and monitor its evolution.     

Carbohydrate Supplementation during Exercise: Does It Help? How Much is Too Much?

KEY POINTS· Carbohydrate intake during exercise can delay the onset of fatigue and improve performance of prolonged exercise as well as exercise of shorter duration and greater intensity (e.g., continuous exercise lasting about 1h and intermittent high-intensity exercise), but the mechanisms by which performance is improved are different.     

The acutely limping child

Acute limping may be the result of multiple pathologies in children. The differential diagnosis varies based on the age of the child. Irrespective of age, the initial imaging work-up includes AP and frog leg radiographs of the pelvis and ultrasound; MRI may sometimes be helpful. In children less than 3 years, infections and trauma are most frequent. MRI is the imaging modality of choice when osteomyelitis is clinically suspected. Between the ages of 3 and 10 years, transient synovitis of the hip and Legg-Calvé-Perthes disease are main considerations but infection, inflammation and focal bony lesions are also considered. In children over 10 years, slipped capital femoral epiphysis also is considered.