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1.
同种异体肌腱移植的实验研究   总被引:6,自引:0,他引:6  
采用淋巴细胞毒试验,淋巴细胞转化试验及吞噬细胞功能实验等多项细胞免疫学指标测定,以及组织形态学观察与生物力学测定,比较深低温冷冻与深低温冷冻干燥两种不同处理方式对同种异体肌腱移植的差异,并综合评价各种移植的效果。结果显示:(1)深低温冷冻移植组及深低温冷冻干燥移植组的淋巴细胞死亡率、转人弦及吞噬细胞吞噬率均低于未经处理的同种异体移植组(P〈0.05),而与自体肌腱移植组差异无显著性(P〉0.05)  相似文献
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Auditory brain stem evoked response in normal full-term neonates   总被引:1,自引:0,他引:1  
Y H Wang  K Hu 《中华医学杂志》1985,65(5):264-269
4.
我国疫苗免疫的几个问题   总被引:1,自引:0,他引:1  
我国疫苗免疫的几个问题王克安计划免疫的主要目的是通过达到和保持人群的高免疫接种率,控制相关疾病,保障人民的身体健康。我国自1978年加强儿童计划免疫工作以来,成绩显著,举世瞩目。据疫情统计,1978年报告脊髓灰质炎发病10353例,死亡259例,经过...  相似文献
5.
Coronal computed tomography findings in 30 cases of skull and brain diseases, including glioma 6 cases, meningioma 4 cases, acoustic neurinoma 3 cases, intraorbital tumor 3 cases, paranasal sinus tumor 3 cases, pituitary adenoma 2 cases, craniopharyngioma 2 cases, nasopharyngeal carcinoma 2 cases, empty sella 1 case, subdural hematoma 1 case, infarction 1 case, subarachnoid cyst 1 case, and metastasis 1 case are reported. The results show that as an adjunct to the axial computed tomography coronal CT scan provides valuable additional diagnostic informations. Coronal CT methods are also discussed.  相似文献
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This paper presents 10 cases with CT appearances of postoperative reactive ring-enhancement in the brain, which were not reported in our country. The mechanisms and differential diagnosis of postoperative ring-enhancement are discussed with reports in the literature. The ring-enhancement at surgical margin is the reactive change of the brain traumatized by operation and related to postoperative pathological processes such as breakdown of blood-brain barrier, vascular granulation and luxury perfusion. This paper demonstrates that reactive ring-enhancement appears as early as 2-4 wk and may last as long as 7 wk after operation. It disappears gradually in 7 wk and cannot exist over 3 mon after operation. In the first 3 mon after operation, peripheral enhancement around the surgical site may be operative reaction, or residual tumor and cerebral abscess. The presence of ring-enhancement beyond 3 mon should be viewed as evidence of pathological process other than postoperative change. This paper emphasizes that ring-enhancement at margin of the surgical site with fine clinical manifestations in the early postoperative period is probably normal postoperative reaction. Close follow-up enhanced CT scan proves to be an effective measure to avoid misdiagnosis and unnecessary reexploration.  相似文献
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Recently, the finite element method has been adopted in the study of tooth structure as well as the stress distribution of dental prosthesis. In order to understand the loading state of the supporting tissues and the stress distribution of the teeth in various shapes under the pressure of loading, the author of this essay has applied the two-dimensional finite element method to the study of the stress distribution of the periodontal supporting tissues at the time when the second bicuspid and the second molar are vertically and obliquely loaded. Finally, the results of the quantitative analysis are obtained and a curve of the stress distribution of the teeth is also drawn up. The conclusion is as follows: 1. When the vertical loading is applied to the occlusal surface of the bicuspid and molar, the stress distribution of periodontal supporting tissues is uniform. 2. The stress concentration is on the marginal ridge and thedistal apex of bicuspid under the oblique loading. 3. When the oblique loading is applied to the occlusal surface of the molar, the stress concentration is only on the marginal ridge, and it is small.  相似文献
8.
Forty pediatric patients with infratentorial cerebellar astrocytomas, medulloblastomas and ependymomas were evaluated. In most cases it was possible to predict the histological type of these tumors by CT. The search for the residual fourth ventricle cavity and defining its location were the first step in differential diagnosis. The density of tumor on plain scans was of value to distinguish medulloblastomas from astrocytomas. Cerebellar astrocytomas had an obvious tendency to develop cystic change. Especially, the configuration of "Cyst-with-mural nodule" was the most specific characteristic in diagnosis. Just like medulloblastomas and ependymomas, cerebellar astrocytomas may have also the tendency to arise at the midline in childhood. The incidence of calcification was rather high in ependymomas.  相似文献
9.
A male patient with hyperemesis as a result of hyperthyroidism was presented. Investigations for causes were negative except for hyperthyroxinaemia. Treatment with antithyroid drug relieved the symptom. Hyperemesis associated with hyperthyroidism occurs predominantly in females. A likely emetic factor oestrogen. Hyperthyroidism could have potentiated this effect. Levels of oestrogens are raised in thyrotoxicosis. The hyperthyroidism, the raised oestrogens and a low emetic threshold conspired to hyperemesis in this patient, a situation not unlike hyperemesis gravidarum. Thyrotoxic vomiting once recognised is readily by antithyroid treatment.  相似文献
10.
Ozone increases bronchial reactivity in normal and atopic subjects. Ozone is produced by high voltage electric discharge. Persons with pre-existent bronchial hyperreactivity should be excluded from work where significant exposure to ozone can occur. We describe a case of occupational asthma due to ozone. The levels of ozone were about 0.04 ppm.  相似文献
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