DESENSITIZATION OF ACETYLCHOLINE ON THE INHIBITION EFFECTS OF BLOOD PRESSURE IN ANESTHETIZED CANINE

Desensitizationisaphenomenonthatthefirstreactiontowardsadrugdecreasedduringoraftercontinuouslyexposure[1] .Now ,theconceptioniswidelyusedtorepresentthephenomenonthatthereactionoftargettissuesorcellstowardshormone ,drugorneurotransmitterisreduced gradually[2 ] .Themechanismofdesensitizationisstillunclear .Itiswellknownthattheeffectsofheart,autonomicneuralsystem ,muscles ,arefadewhenexposuretoacetylcholine (ACh)foraperiodoftime[3] .Atpre sent,manystudiesfocusonisolatedtissuesorcells[1,5,6 ,7,8]…     

MR ASSESSMENT OF LUNG DEVELOPMENT IN FETAL ANOMALIES USING RATIO OF LUNG TO LIVER SIGNAL INTENSITIES

Objective To evaluate the monitoring and diagnostic potential of MR in fetal lung development using lung signal intensity changes in the fetus. Methods The lung-to-liver intensity ratio was calculated by means of region-of-interest analysis in all 35 fetuses including 7 bilateral urinary anomalies, 9 unilateral urinary anomalies, 5 pulmonary anomalies, and 14 others. Results All fetuses with urinary anomalies and pulmonary anomalies showed low ratio of lung-to-liver signal intensity. Conclusion Low ratio of lung-to-liver signal intensity on MR imaging indicates pulmonary hypoplasia after 22 weeks' gestation.     

绞股蓝总皂甙对犬心血管系统作用的实验研究

实验观察了绞股蓝总甙对开胸麻醉犬心血管系统的作用。iv绞股蓝总甙1mg/kg后,BP、LVSP及±dp/atmax显著上升;iv绞股蓝总甙20mg/kg后,HR、BP、LVSP、+dP/dtmax、CI、V_(CE)—+dp/dtmax明显下降。结果提示;iv绞股蓝总甙引起血压及心脏功能的变化可因剂量不同而反应不同。     

绞股蓝总皂甙对Lewis肺癌的作用

绞股蓝总皂甙（ＧｙｐｅｎｏｓｉｄｅｓＧＰ）对Ｌｅｗｉｓ肺癌原位肿瘤的生长及肺转移均有抑制作用。在１５、３０、６０ｍｇ／（ｋｇ·ｄ）的剂量下，原位肿瘤的抑制率分别为３１．８％、４５．２％、４９．３％，且能明显减少肺转移集落数，有明显剂量依赖关系。     

EFFECTS OF ACUPUNCTURE ON ACTIVITIES OF INTRINSIC CARDIAC NEURONS ON SURFACE OF CANINE HEARTS

Numerousgangliaandnerves(constitutingaganglialplexus)werefoundintherightatrialfatpadonsurfaceofcanineheart.Cardiacintrinsicneuronsintheplexushavebeenassumedtocontainnotonlyparasympatheticefferentneurons,butafferent,localcircuitandpostganglionicsympatheticneuronswerealsopresentintheplexus"~".Itwasnuclearwhetherandhowcardiacneuronsconnectwithsomatoceptororacupuncturepoints.Thechangeofcardiovascularactivitymaybeinducedfollowingacupuncture.Itwassuggestedthatacupuncturewouldhavethebitropicadjustmen…     

肺癌患者放疗前后血清LCA的检测及其临床意义

采用混合单克隆抗体金标免疫斑点法对46例肺癌患者放疗前后及30例肺良性病和20例正常对照血清的肺癌相关抗原（LCA）进行检测。结果表明：肺癌患者放疗前LCA的阳性率为97．83％，明显高于正常对照（0％）及肺良性病（13．33％）（P＜0．005）；放疗后LCA的阳性率为82．61％，较放疗前明显下降（P＜0．05），LCA的阳性率在不同病理类型、临床分期及近期疗效间无显著性差异（P＞0．05）。     

TREATMENT OF CANINE ACUTE LIVER FAILURE WITH MODIFIED EXTRACORPOREAL PIGLIVER PERFUSION

Acuteliverfailure(ALF)isaseveresymptomcausedbykindsofreasons ,suchaschemicalandvirologicalones.Becauseofthelife threatingcom plicationsofacuteliverfailure ,75 %of patientswilldiewithinafewdaysofonset.TherewasnosatisfactorytreatmentforALFexceptlivertrans plantation .Althoughlivertransplantationissuccess ful,withasurvivalraterangingfrom 6 0 %to80 % [1] .Thereisashortageofavailabledonoror gans.Onlyalittleamountofpatientsreceivedlivertransplantation[2 ] .Sothereisagreatneedforanef fectiveliver…     

肝动脉桥式转流维持犬移植肝肝动脉血流的作用

目的介绍一种新的解决原位肝移植中肝动脉缺血(hepatic arterial ischemia,HAI)的方法:应用肝动脉桥式转流(hepatic arterial bridge bypass,HABB)维持动脉吻合时供肝肝动脉血流,并对其血流动力学参数变化进行初步观察。方法选择健康雄性西安地区杂交犬20只,制作犬简易自体原位肝移植模型,通过腹主动脉建立肝动脉桥式转流,测量转流前、转流15 min和转流结束1h肝动脉峰值流速(peak velocity,PV)和血流量(blood flow,BF),并统计腹主动脉插管时间和并发症。结果转流情况下肝动脉内血流峰值流速和血流量低于转流前(P<0.05),分别为转流前的83%和80%;在转流结束,开放肝动脉1h后,其血流动力学参数与转流前没有显著性差异。平均腹主动脉插管时间3 min,2例出现腹主动脉插管后荷包缝合处出血。结论肝动脉桥式转流是一种简便而有效的解决原位肝移植中肝动脉缺血的方法,但是这一方法仍然需要继续完善和改进。     

狗心左室乳头肌的动脉

1.用血管造影法和腐蚀法对110例狗心左室乳头肌动脉分布进行了观察,并结合分布特点计论了冠状动脉阻塞时对乳头肌可能产生的影响。2.前、后主要乳头肌均为附着型。前乳头肌平均长1.96厘米,宽1.10厘米。后礼头肌平均长2.04厘米,宽1.2厘米。3.前乳头肌血供来源Ⅰ型(由前降支供应)最多,占71%,Ⅱ型(前降支和左旋支的分支)次之,占18%。后乳头肌血供来源Ⅰ型(左旋支的分支)最多,占91%,其中65%来自左室后支。4.乳头肌内部血供特点:(1)均来自直走型动脉支;(2)均呈节段性分布。每肌接受2—9支,5,6支最多;(3)动脉支在肌内分布有一定的对称性;(4)动脉的排列形式以混合型最多;横行型次之;(5)动脉支在乳头肌心内膜下层吻合成心内膜下丛,中上部较明显、     

人心左室乳头肌形态和动脉供应

<正> 二尖瓣环、瓣叶、腱索和乳头肌组成的二尖瓣复合体,在防止血液返流方面起着重要作用。乳头肌作为复合体的主动部分,具有更重要的意义。乳头肌功能紊乱是产生病理性杂音的常见原因之一,由梗塞所造成的乳头肌断裂将导致更严重的后果。有关人心左室乳头肌血供的研究,国外有少量报导,国内仅北京医学院夏家骝等人进行了研究。基于其重要性,我们对人心左室乳头肌形态和动脉供应进行了研究。     

小剂量阿霉素对大鼠左心室功能的影响

本文以小剂量(1mg/kg/次)阿霉素腹腔注射,每周一次共计10周。第11周测定左心室功能,结果显示:1.血压、心输出量、每搏量及心率无明显改变;2.左心室内压力峰值无明显改变,+dp/dtmax明显降低(对照组为728.88±38.39 KPa/s,ADM组为626.77±25.59,p<0.05),降低幅度为14%;3.-dp/dtmax明显降低(对照组为618.78±39.86 Kpa/s,ADM组为461.75±20.53,p<0.05),降低了25%,T值由对照的17±1ms延长至24±2ms,增加了41%(p<0.05);4.△P/△V无显著性改变。结果说明在严重的心力衰竭发生之前,反映心脏舒张性能的指标(T值、-dp/dtmax)已有明显改变,较为敏感。     

室性早搏对左心功能影响的实验研究

本文应用心室起搏方法,在12只清醒犬研究了不同刺激部位(左室前、后壁及右室流出道)和连结间隔的室性早搏对左室功能的影响。发现,室性早搏与对照比较,左室收缩压峰值(LVSP)在各刺激部位和连结间隔基本上没有变化;左室压变化速率(LV dp/dt)和每搏输出量(SV)在各部位短连结间隔显著降低;左室舒张期末压(LVEDP)仅在刺激左室前、后壁的短连结间隔显著减少。室性早搏与早搏后代偿收缩相比,LVSP 在各剌激部位的短连结间隔显著降低;LVEDP和 dp/dt,在各刺激部位和连结间隔都显著降低;SV,除右室流出道的长连结间隔外,均显著降低。并且,这些变化与刺激部位和连结间隔密切相关。总之,实验证明,室性早搏可使左室心肌收缩性能和泵功能降低,而且,右室功能状态也可影响左室机能。     

利血平与戊脉安对豚鼠左心房的作用比较

利血平具有浓度依赖性负性肌力作用。对异丙肾上腺素量-效反应的影响与戊脉安相似,不同于β-受体竞争性拮抗剂心得安.对Ca~(2+)量-效反应的影响与戊脉安相似,表现为非竞争性拮抗作用,还具有频率依赖性负性肌力反应.结果说明利血平对豚鼠左心房肌的作用与戊脉安相似,可能具有Ca~(2+)拮抗作用.     

肺癌患者血浆中血小板GMP－140的测定

采用ＧＭＰ－１４０单抗ＳＺ－５１采用酶联免疫吸附试验检测了７４例肺癌患者ＧＭＰ－１４０含量并与４０例健康人作了对照，结果发现肺癌患者血浆ＧＭＰ－１４０均值高于正常人（Ｐ＜０．０１），尤其在肺癌伴转移患者更为明显，且亦高于肺癌未转移患者（Ｐ＜０．０５），为进一步探讨血小板在肿瘤增殖与转移中的作用及临床治疗提供了参考依据。     

EXPRESSION AND SIGNIFICANCE OF C-erbB-2 IN THE TISSUES OF LUNG CANCER

The tyrosine kinase receptor C-erbB-2 (alsocalled HER-2/neu) is a member of the epidermalgrowth factor receptor (EGFR ) family. Memberproteins of this fami1y are membrane proteins andeach of which contains an intracellular domain, atransmembrane domain and an intracellular regionwith intrinsic tyrosine kinase activity. C--erbB-2gene plsay an important role in the development ofcancer. Overexpression of C-erbB-2 can not onlyenhance the ability of the growth and metastaticpotential in cance…     

THE EVALUATION OF LUNG CANCER PREVENTION IN BAOJI CITY OF SHAANXI PROVINCE OF CHINA

Recently,the mortality of lung cancerincreasesin many areas and countries,and lung cancer is be-coming the major disease in malignant tumour re-search.Baoji city was found to be one of the citieswith high lung cancer incidence in China in early1 970 s[1] . Thereafter,intervention measures havebeen adopted,such as establishing the Environmen-tal Monitoring Station in Baoji to control the pollu-tion of land,water and air,a number of workshopsand propaganda in cancer prevention,smoking- con-tro…     

气腹对循环肺通气的影响

采用喉罩通气 ,用于 6 0例腹腔镜胆囊切除术麻醉 ,观察 CO2 气腹对循环和肺通气的影响及高 CO2 血症。结果 :充气腹后心率、血压、气道阻力明显增加 ( P <0 .0 1 ) ,Pa CO2 升高不显著 ,但放气腹后显著升高 ( P <0 .0 1 )。无缺氧现象。认为术中应积极预防心率、血压增高 ,术毕加强监护避免高 CO2 血症。     

肺癌患者神经肌肉传递功能的变化

通过重复神经刺激，检查了35例肺癌患者神经肌肉传递、运动神经传导速度（MCV）、感觉神经传导速度（SCV）及感觉神经电位（SNAP）幅度的改变。发现8例燕麦细胞癌患者在重复低频刺激时CMAP幅度减小，重复高频刺激时CMAP幅度增大，5例非小细胞肺癌患者也有同样变化。肺癌患者正中神经和腓肠神经的SNAP幅度明显降低。提示肺癌时既有神经肌肉传递功能的障碍，也有其它的周围神经系统病变。     

ELECTROPHYSIOLOGICAL EFFECTS OF TETRAHYDROPALMATINE ON CANINE PURKINJE FIBER AND VENTRICULAR MUSCLE IN VITRO

ＥＬＥＣＴＲＯＰＨＹＳＩＯＬＯＧＩＣＡＬＥＦＦＥＣＴＳＯＦＴＥＴＲＡＨＹＤＲＯＰＡＬＭＡＴＩＮＥＯＮＣＡＮＩＮＥＰＵＲＫＩＮＪＥＦＩＢＥＲＡＮＤＶＥＮＴＲＩＣＵＬＡＲ　ＭＵＳＣＬＥＩＮＶＩＴＲＯＺｈａｎｇＤｉａｎｚｅｎｇ（张殿增）；ＬｉＸｉｋｕａｎ（...