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21.
本文采用热变性温度法和液相复性速率法对—轻型特征及血清学反应相似米克戴德军团菌(Lm)的菌株进行了测定,结果表明该菌与标准Lm(C DC株)的DNA G Cmol%相差3.45%,与标准Lm(C DC株)的DNA同源性达81.99%,根据伯杰细菌鉴定手册(1984),可判定该菌株与标准Lm(C DC株)为遗传型一致的类群,即从遗传学角度证明该菌为Lm。 相似文献
22.
Zhuo Liu Boliang Wang Xiuying Xu Cheng Wang 《Computerized medical imaging and graphics》2006,30(6-7):371-376
This paper constructs two finite element models of human crystalline lens and zonules based on published clinical data. Displacement and pressure were applied to study the mechanism of vision accommodation. The simulation results show that, in Model A, under the pull of the zonules, the thickness of the lens decreased linearly, and the lens diameter increased linearly. The optical power of the lens increased as the zonules displacement increased. Furthermore, the pressure had a remarkable influence on the shape of the lens and the optical power. The lens also became thinner and flatter as the pressure increased. The optical power increased when the pressure increased. In Model B, the lens became thicker and optical power increased as the equatorial zonules stretched. It is basically consistent with Schachar's hypothesis. The outcome of this paper proved that the analytical model presented in this paper can be used in the theoretical study of the accommodation mechanism of the lens. 相似文献
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24.
拉萨地区高原肺水肿经颅多普勒21例分析 总被引:1,自引:0,他引:1
目的:通过经颅多普勒(TCD)检测,了解高原肺水肿(HAPE)患者颅内脑底动脉环上的主要动脉血流动力学及各血流的生理参数,为高原肺水肿的诊断及治疗提供一些参考.方法:将已确诊的HAPE患者,与颞窗通过低频脉冲多普勒(2MHZ),获得颅内脑底动脉环上的主要动脉的多普勒超声频移信号,进行TCD检测.结果:TCD检测后了解到颅内脑底动脉环上的主要动脉:颈内动脉末梢、大脑中动脉、大脑前动脉血流速度(收缩期血流速度,平均血流速度,舒张末期血流速度)与正常人的TCD测值相比明显增快,但舒张末期血流速度(VE )增快较收缩期血流速度(VP )不明显,故频谱仍为低阻波形,搏动指数(PI)、收缩期血流速度与舒张末期血流速度的比值(S/D)正常,阻力指数有所降低.结论:经TCD检测可知高原肺水肿患者在高原(在低氧环境下),颅内主要脑血管扩张,脑血流量增加即颈内动脉系统的MCA,ACA,PICA血流速度(Vs,Vm,Vd)增快,通过TCD检查可为高原医生早期诊断及治疗提供参考. 相似文献
25.
输尿管镜气压弹道碎石治疗输尿管结石110例 总被引:9,自引:2,他引:7
目的总结输尿管镜气压弹道碎石治疗输尿管结石的临床效果。方法采用F8/9.8 Wolf硬性输尿管镜、JUN—AIR气压弹道碎石机治疗110例输尿管结石。结果输尿管镜直视下一次碎石成功105例,成功率95.5%(105/110),1~6周内结石全部排净。2例因置镜失败改开放手术,3例输尿管上段结石上移至肾脏行ESWL2例,口服排石药物治疗1例。术后泌尿系感染5例,轻度肉眼血尿1~3d。结论输尿管镜气压弹道碎石是治疗输尿管中、下段结石的有效方法之一,具有碎石率高、安全、并发症少、操作简单的优点。 相似文献
26.
对耳轮过度前突为对耳轮的角度过锐,致使耳轮的位置相应后移,表现为与招风耳完全相反的畸形。畸形虽不十分明显,但影响美观。自1992年4月开始应用患侧耳廓软骨和耳后皮瓣对5例患者8只外耳进行治疗得到满意效果。认为文中所述方法是矫正对耳轮过度前突畸形的良好方法。 相似文献
27.
乙酰胆碱受体抗体量与眼型重症肌无力病情关系的实验观察 总被引:2,自引:0,他引:2
目的 观察血清乙酰胆碱受体抗体 (Ach Rab)含量与眼型重症肌无力患者病情程度和发展为全身型重症肌无力的关系。方法 2 0例眼型重症肌无力患者按受累程度分为轻、中、重三组 ,采用固相酶免疫吸附法测定血清 Ach Rab含量 (P/ N值 )。结果 对照组和病情轻、中、重三组血清 P/ N值分别为 :0 .6 7± 0 .45、0 .78± 0 .30、1.16± 0 .18和 1.5 1± 0 .13。轻度组与对照组比较无显著差异 (P >0 .0 5 ) ,中度组与轻度组比较差异显著 (P <0 .0 5 ) ,重度组与中度组比较有非常显著差异 (P <0 .0 1)。3例 P/ N值明显高患者 (中度组 1例、重度组 2例 ) 2年后发展成全身型。结论 P/ N值可反映患者病情程度和提供眼型重症肌无力发展为全身型重症肌无力的预兆信息。 相似文献
28.
In the paper is presented the experience of operative treatment of 149 patients with false joints of bones, which were subjected to internal osteosynthesis with preservation of inter-fracture tissues. The operation was carried out in the absence of real danger of suppuration. The most frequently operated were the patients with tibia pseudarthrosis (72.5%), fixed by means of a plate. Adhesion has been achieved with 96.7% of patients. Complications: osteomyelitis (1), skin necrosis (2), fractured fragment dislocation under the action of contractor compression application (2). In the process of treatment of 439 patients by means of internal osteosynthesis with dissection of inter-fracture tissues, separation of bone fractured fragments and medullar cavity opening, adhesion has been achieved with 87.2% of patients. 相似文献
29.
According to the TCM theory that the kidney is in charge of the bone, the authors carried out a study on the effect of acupuncture on bone mineral density in 40 postmenopausal women with osteoporosis treated by the method of reinforcing the kidney to strengthen the bone, with satisfactory therapeutic results reported as follows. 相似文献
30.
Peter J. Harris Jialong Zhuo Sandford L. Skinner 《Clinical and experimental pharmacology & physiology》1987,14(6):489-502
1. The role of angiotensin as a modulator of proximal glomerulotubular (GT) balance was investigated in anaesthetized rats by examining the relationship between glomerular filtration rate (GFR) and absolute proximal reabsorption (APR) during removal of endogenous angiotensin II (AII) and III (AIII) with enalaprilat (CEI) and then during their subsequent replacement by intravenous infusions. 2. Enalaprilat lowered mean arterial blood pressure (MABP) and increased renal blood flow (RBF), GFR, urine flow rate and sodium excretion. Filtration fraction (FF) was not altered. Absolute proximal reabsorption, derived from fractional lithium clearance, increased by only 48% of the change expected for 'perfect' GT balance. 3. Angiotensin II replacement corrected MABP, GFR and plasma renin level, but reduced RBF and increased FF; APR was decreased and GT balance was restored. Urine flow and sodium excretion remained above control values with AII. 4. Replacement with AIII did not correct the hypotension but completely reversed the renal and renin responses to enalaprilat and restored GT balance without affecting FF. 5. It was concluded that the relation between proximal reabsorption and GFR is considerably modified by the intrarenal angiotensin concentration. The findings are best explained by a direct stimulation of proximal tubular sodium transport by angiotensin at the concentrations existing in anaesthetized rats. 相似文献