The filter properties of the arterial beds of organs in rats.

The frequency properties of arterial beds in organs were studied by temporarily ligating the renal, the gastric, the splenic or the superior mesenteric arteries of rats. Blood-pressure waves of the tail arteries were recorded before and during the ligations, and were analysed by Fourier's transformation. Their frequency spectra have been found to change profiles following specific patterns with the ligations of different arteries. The results were significant with regard to the frequency selectivities of the organic arterial beds. Such frequency properties can be clearly explained when the circulation system is viewed as an electrical circuit network in which the organic arterial beds work as filters.     

EVALUATION OF INDOCYANINE GREEN RETENTION AND AMINOPYRINE BREATH TESTS IN PATIENTS WITH MALIGNANT BILIARY OBSTRUCTION

Impaired hepatic function is a major contributory factor to the high incidence of postoperative morbidity and mortality in patients with malignant biliary obstruction. Dynamic hepatic function tests such as indocyanine green (ICG) retention and aminopyrine breath tests were evaluated in such patients to define whether they were clinically useful for prediction of postoperative morbidity and mortality. Forty-four patients with malignant biliary obstruction undergoing surgery for relief of obstructive jaundice were recruited into the study. Indocyanine green retention and aminopyrine breath tests were carried out in all patients pre-operatively and repeated in 36 patients postoperatively. The ICG retention was abnormal in all patients before surgery and there was significant improvement 2 weeks after surgery (32.8 ± 2.5%vs 18.3 ± 2.8%, P= 0.001). The change in ICG retention levels correlated with the serum bilirubin levels but the pre-operative ICG retention value could not predict postoperative morbidity and mortality. The aminopyrine breath test was abnormal in all but one patient. It correlated with pre-operative prothrombin time of the patients before surgery but it did not improve significantly after surgery and was not predictive of postoperative outcome. It is concluded that both ICG retention and aminopyrine breath tests have limited clinical value in the pre-operative evaluation of patients with malignant biliary obstruction.     

缺血－再灌注兔心肌肌浆网自由基的测定

应用电子自旋共振波谱仪（ＥＳＲ）直接检测了缺血－再灌注兔心肌肌浆网自由基的变化，以探讨肌质网系统与氧自由基的关系。实验中将２０只兔随机分为再灌注对照组、超氧化物歧化酶（ＳＯＤ）组、ＡＴＰ－氯化镁组和人参皂甙Ｒｅ组。实验结果，ｇ值２．００４６处为半醌自由基波谱，其相对浓度各组依次为７８．９４±２．１２６，１４．４６±２．８６，２０．６５±７．６５，１４．６６±３．６７（ｘ±ＳＤ），对照组与用药组均有显著性差异（Ｐ＜０．０５），表明缺血－再灌注兔心肌肌浆网产生大量的自由基，用ＥＳＲ可以直接检测到半醌自由基，外源性高能磷酸盐制剂ＡＴＰ－氯化镁及人参皂甙Ｒｅ与超氧化物歧化酶一样，发挥清除兔心肌肌浆网自由基的作用。     

Sex hormone level of malnourished vulvae treated with traditional Chinese medicine

This paper intend to introduce the therapeutic method of combining TCM and WM as well as the laboratory study to 91 patients with malnourished vulvae. The results showed that the concentration of the luteinizing hormone (LH) in the patients' serum was evidently lower than that in the control group (P less than 0.01). The concentration of follicle-stimulating hormone (FSH) was evidently higher than that of the control group (P less than 0.01). The serum LH of the patients in cured group tended to be higher, and approximated to normal level (P greater than 0.05); the concentration of FSH got lower, and reached to normal level (P less than 0.05). The estradiol (E2) levels in the serum during the ovulation period and follicular period were obviously lower than that in the control group (P less than 0.01; P less than 0.05). The progesterone (P) level during the ovulation period was lower than that in the control group (P less than 0.05). The kraurosis index of the cast-off cells from the labium minus of the vagina in the test group was lower than that in the control group, but it was obviously higher in the cured group, and approximated to normal control group.     

人胎胸腺乙酰胆碱酯酶阳性反应细胞的形态观察

应用乙酰胆碱酯酶组织化学方法在光镜下观察了５￣６个月胎儿胸腺实质中乙酰胆碱酯酶阳性反应细胞的分布及形态结构。结果表明：乙酰胆碱酯酶阳性反应细胞主要分布于胸腺的髓质中，这些细胞可能是淋巴细胞，上皮性网状细胞及上皮性网状细胞－淋巴细胞复合体。就此种细胞的功能进行了讨论。     

用尿谷胱甘肽过氧化物酶评定颈椎病的康复疗效

测定了44例颈椎病患者康复前后尿液中谷胱甘肤过氧化物酶(GSH-Px)活力的变化。患者在治疗前,尿中GSH-Px活力为1080±310U/L((?)±s),与健康对照组相比差异有高度显著性(P<0.001)。推拿和颈牵治疗后尿中GSH—Px活力平均下降38.8%,且下降幅度和疗效之间有着明显的平行关系。据此,我们认为颈椎病的发病可能和体内自由基代谢紊乱有关,同时认为,无创伤的尿GSH—Px活力测定可以作为颈椎病康复疗效评定的客观指标,从而为颈椎病康复疗效的评定提供科学的生化依据。     

甾体避孕药不增加血栓栓塞性疾病危险(病例对照研究)

本文采用1:3病例对照研究方法,对甾体避孕药的使用与血栓栓塞性疾病(急性心肌梗塞、脑栓塞、脑血栓形成和深静脉血栓形成)间的关联进行多因素分析。结果提示在我国广泛应用的甾体避孕药(主要为国产Ⅰ号避孕药)并不增加血栓栓塞性疾病的危险性。用药和停药时间的长短与血栓栓塞性疾病的发生无关,并与高血压病之间亦不存在协同作用。     

脱乙酰化反应条件对壳聚糖性能的影响

本文研究了甲壳素在脱乙酰化反应时不同反应条件,如碱浓度、反应时间、反应温度和处理方法对壳聚糖性能,如分子量、脱乙酰化度的影响,探讨了分子主链降解反应与脱乙酰化反应之间的关系。结果表明:随着碱浓度和反应时间的增加,壳聚糖脱乙酰化度提高,而分子量降低;脱乙酰化越高,主链降解程度增加;反应温度升高,脱乙酰化反应速度加快;而采用短时重复多次反应的处理方法,则可增加壳聚糖的脱乙酰化度,并减少主链降解程度。     

婴幼儿缺铁性贫血对听觉脑干诱发电位的影响

对４８例６～３２个月龄缺铁性贫血（ＩＤＡ）患儿及３０例正常婴幼儿进行了听觉脑干诱发电位（ＡＢＲ）测试，并对其中４例患儿进行补铁后复查。结果显示：ＩＤＡ患儿中ＡＢＲ异常者占５４．２％。ＩＤＡ主要造成听觉系统周围性损害，对中枢脑干部位的损害较小。ＩＤＡ的程度与ＡＢＲ异常的程度直接相关：ＡＢＲ异常组的血红蛋白、血清铁均值明显低于ＡＢＲ正常组；中枢性损害组血清铁均值明显低于周围性损害组；重度ＩＤＡ组ＡＢＲ异常发生率明显高于轻度ＩＤＡ组。ＩＤＡ患儿的Ｖ波反应阈明显增高，提示有与语言理解困难有关的高频听力障碍。４例患儿ＡＢＲ复查结果表明，早期发现并及时纠正ＩＤＡ，则其造成听觉系统的损害是可以恢复的。