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1.
三种碳纤维增强复合材料的体外力学性能   总被引:1,自引:0,他引:1  
目的:研究碳纤维增强(CFR)的聚酯(PE)、聚砜(PSF)和聚醚醚酮(PEEK)等复合材料在模拟生理环境中的力学性能变化。方法:将试样分别浸泡于37℃,65℃和95℃林格液中,并在0~256 d 的时间段内分别测量材料的抗压强度和弹性模量,干燥试样作为对照。计算材料强度和模量降低的百分比。结果:在给定时间和温度的条件下,CFR/PEEK 在林格液环境中的抗压强度和弹性模量均无明显改变。而CFR/PE和CFR/PSF则随浸泡时间的延长,抗压强度和弹性模量明显降低。其降低值与时间和温度均相关。结论:CFR/PEEK 在模拟生理环境中具有良好的生物力学稳定性,而CFR/PE和CFR/PSF在应用于体内时则必须考虑材料力学性能的改变。  相似文献   

2.
采用放射免疫的方法检测了60例流行性出血热(EHF)病人尿液样本94份。结果显示早期病人(1 ̄4病日组)尿液6-酮-PGF1a开始下降,低下正常人水平(P〈0.01),这一改变与病情严重程度高度相平行。结果提示EHF早期病人肾内PGI2代谢就存在改变,这种变化可能与EHF病情加重有关。  相似文献   

3.
采用放射免疫的方法检测了60例流行性出血热(EHF)病人尿液样本94份。结果显示早期病人(1~4病日组)尿液6-酮-PGF_(1α)开始下降,低于正常人水平(P<0.01),这一改变与病情严重程度高度相平行。结果提示EHF早期病人肾内PGI_2代谢就存在改变,这种变化可能与EHF病情加重有关。  相似文献   

4.
目的 对实验性梗阻性黄疸时血浆内皮素1(ET-1)的变化及其与梗阻性黄疸时血流动力学改变的关系进行研究。方法 用胆总管结扎法建立梗阻性黄疸大鼠模型,特异性放射免疫分析法测定血浆ET-1,生理记录仪和电磁血流计测定肝动脉血流量(HABF)、门静脉血流量(PVBF)、门静脉压力(PVP)。结果 梗阻性黄疸时血浆ET-1低于正常对照组。其血浆EF-1含量与HABF、PVBF呈正相关。结论 梗阻性黄疸时血  相似文献   

5.
为了解低氧对肺内血管内皮生长因子(VEGF)基因表达的影响及VEGF在肺动脉闹压发生中的作用,以常压低氧建立大鼠肺动脉高压模型,采用Elisa检测大鼠肺动脉血血清VEGF的含量改变,以体外转录并用DIG-UTP标记的VEGF cRNA探针进行肺组织原位杂交,检测大鼠肺内VEGF mRNA表达的变化。结果发现:低氧3周后,大鼠形成明显的肺动脉高压;大鼠肺动脉血血清中VEGF含量在低氧3周组为420.  相似文献   

6.
医用直线加速器楔形因子与深度依赖性研究   总被引:1,自引:0,他引:1  
目的:确定楔形因子(WedgeFactorWF)随射野大小变化对于放射治疗中吸收剂量的影响。材料与方法:笔者在SIEMENSMEVATRON12(以下简称SIEMENS)直线加速器上对WF随水体模中测量深度变化关系进行了测量研究,使用配有0.6cc电离室的3570剂量仪作为剂量测量仪。结果与结论:通过测量发现在体模内最大剂量点到体模内20cm范围内WF随测量深度变化最大有6%的改变。而WF与体模表面下10cm处测得的WF相比最大有3%的偏差。  相似文献   

7.
目的 探讨肺癌术前计算预计术后1s用力呼气容积(PPO-FEV1)预测手术风险的标准。方法 应用Juhl公式计算383例患者的PPO-FEV1,按手术方式将全部患者分为肺叶切除组(肺叶组)和全肺切除组(全肺组),研究PPO-FEV1与并发症的关系。  相似文献   

8.
通过培养的大鼠胸主动脉内皮细胞(CEC)及胸主动脉环,利用生物分析法,探讨CEC释放内皮源性舒张因子(EDRF/NO)的检测方法,影响EDRF/NO分泌的因素。发现单纯CEC或经乙酰胆碱(Ach)预处理的CEC对去内皮血管环张力无明显影响;而经L-精氨酸(L-Arg)或L-Arg和Ach预处理的CEC可引起去内皮血管环产生明显舒张;NG-甲基-L-精氨酸和Ach预处理的CEC则引起去内皮血管环明显收缩。提示CEC在基础状态和经Ach预处理后,其合成和分泌EDRF/NO的能力很低或丧失,可能存在内源性EDRF/NO前体L-Arg不足,供给外源性L-Arg有增强CEC合成和释放EDRF/NO的作用。在L-Arg供给充足情况下,Ach可进一步刺激CEC释放EDRF/NO。  相似文献   

9.
为研究2型糖尿病患者尿EGF水平的变化,用放免法测定了107例2型糖尿病患者和51名健康自愿者尿EGF、AER及β2──MG水平。结果显示107例患者尿EGF较对照组显著降低,但当患者AER及β2-MG尚正常时,尿EGF较对照组显著增高,AER、β2-MG增高时,尿EGF则显著降低,且尿EGF降低与β2-MG增高关系更密切。提示尿EGF变化与DN关系密切,当2型糖尿病患者肾脏功能受损时,尿EGF水平降低可能反映了肾脏功能障碍。  相似文献   

10.
应用ELISA方法检测妇科肿瘤患者血清肿瘤坏死因子(TNF),与健康供血者作对照。结果表明:子宫颈癌、子宫内膜癌、子宫肉瘤及良性卵巢囊肿血清TNF-α无明显改变;卵巢癌患者血清TNF-α明显升高,与卵巢癌临床分期无关,卵巢癌瘤内液TNF-α高于血清水平。  相似文献   

11.
FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…  相似文献   

12.
Dr.Zhang Ren,the chief physician,is the chairman of Shanghai Acupuncture and Moxibustion Association.Having been engaged in medicine for about 40 years,he is experienced in treating various intractable diseases.In his long years of clinical practice,he advocates taking the TCM differentiation as the basis to seek for the acupuncture method for treatment of modern intractable diseases.The author of this essay had the fortune to follow Dr.Zhang in study.The following is a summary of Dr.Zhang's experience in the acupuncture treatment for different intractable diseases with the same therapeutic principle.  相似文献   

13.
In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.  相似文献   

14.
Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.  相似文献   

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16.
目的 探讨猪肺磷脂注射液联合经鼻持续气道正压通气(NCPAP)对呼吸衰竭早产儿的临床疗效及肌酸激酶同工酶活性(CK-MB)的影响.方法 选取呼吸衰竭早产儿80例,分为观察组和对照组各40例.对照组采用NCPAP给氧治疗,观察组给予NCPAP给氧联合猪肺磷脂气管内给药.观察两组患儿治疗前及治疗12h、24 h后PaO2、PaCO2、血氧饱和度(SaO2)、pH的变化情况,检测治疗前及治疗5d后血清CK-MB水平;评估两组患儿的临床治疗效果.结果 两组患儿PaO2、PaCO2、SaO2、pH比较,差异均有统计学意义(P<0.05),其中观察组治疗后的PaO2、SaO2、pH均高于对照组,PaCO2则低于对照组.两组的PaO2、SaO2、pH均随观察时间延长而升高(P<0.05),PaCO2均随观察时间的延长而降低(P<0.05).观察组治疗有效率为87.5%,显著高于对照组的70.0% (P <0.05).治疗5d后两组患儿血清CK-MB水平均较前降低(P<0.05),且观察组明显低于对照组(P<0.05).结论 猪肺磷脂注射液气管内给药联合NCPAP可以显著降低呼吸衰竭早产儿CK-MB的含量,提高治疗有效率,起到很好的呼吸循环支持作用.  相似文献   

17.
CASE HISTORY A female patient, 46 years old, head of the foreign affairs department of a certain university in Beijing, paid her first visit on October 9, 2006, with the chief complaint of vomiting for one month. She got vomiting after meals in early September. Before that, she had discomfortable sensation in the stomach due to angry with others, but she didn't pay much attention. Later, it developed into vomiting after eating. After the vomiting, the discomfort would be relieved, but with slight hypodynamia. She was once diagnosed as having 'neurogenic vomiting'. Having taken some western and Chinese drugs, the above symptoms were a little bit improved, but she would have nausea upon eating and with regurgitation. Because of the fear for vomiting, she did not dare to have food intake, with body weight reduction of 6 kilos in one month.  相似文献   

18.
Radiotherapy and chemotherapy are the important modern medical therapies for malignant tumors,yet they can also bring about serious local and systemic toxic side reactions so to decrease the patient;'s life quality,manifested by a series of consumptive symptoms.Having engaged in the combined work of Chinese and western medicine for nearly 50 years,the research fellow Qiu Baoguo in Henan Provincial Academy of TCM has developed his unique views on the TCM study of consumptive syndromes.The author of this essay had once the fortune tO follow Dr.Qiu in clinic,and specially would like to introduce in the following Dr.Qiu's experience in treating consumptive syndromes after radio-chemotherapies for patients with malignant tumor.  相似文献   

19.
OBJECTIVE: To observe therapeutic effects of the comprehensive therapy of acupuncture-moxibustion and Chinese Tuina for treatment of insomnia due to deficiency of both the heart and spleen. METHODS: 92 cases were divided randomly into the treatment group (treated by acupuncture-moxibustion and Chinese Tuina) and the control group (treated by acupuncture-moxibustion). RESULTS: The therapeutic effect of the treatment group was obviously superior to that of the control group (the CHI2 test showed P < 0.01). CONCLUSIONS: The comprehensive therapy of acupuncture-moxibustion and Chinese Tuina can give marked therapeutic effects for treatment of insomnia due to deficiency of both the heart and spleen.  相似文献   

20.
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