炭黑／结晶性含氟树脂合金在自控温加热电缆中应用

选择了结晶性含氟树脂添加改性剂为树脂基体，与炭黑制居复合导电体系。通过这个对体系不同条件下ＰＴＣ特性的研究，对其配方与加工工艺进行优化。并利用扫描电镜，Ｘ射线衍射，ＤＳＣ等分析测试手段，对体系的各种开矿结构进行了研究，阐明了该导电复合体系的形态结构与性能的关系。     

体外循环围术期呼气未CO2监测

观察２０例风心和先心患者在体外循环围术期各时期的ＰａＣＯ２和相应的ＰＥＴＣＯ２。结果表明：１．各时期的ＰａＣＯ２与ＰＥＴＣＯ２均显著相关（Ｐ＜０．０５），ｒ值为０．６８６～０．９９５；２．体外转停后风心组Ｐａ－ＥＴＣＯ２显著高于其他时期（Ｐ＜０．０５）。提示ＥＴＣＯ２监测可减少检测动脉血气的频率，但不能完全替代ＰａＣＯ２；长时间的体外转流加大Ｐａ－ＥＴＣＯ２差值。     

Hospitalized occupational finger amputations,New Jersey, 1985 and 1986

About 19,000 finger amputations occur at work each year in the United States. Twenty percent of these injuries are severe enough to require hospitalization. Hospital discharge data from New Jersey (1985, 1986) were used to describe the demographic characteristics of persons with such injuries and to identify potential subjects for telephone interview. A total of 637 persons hospitalized for finger amputations were sent letters asking for their participation. Of 637 persons, 355 (56%) were contacted and 228 (36%) were interviewed, of whom 134 (59%) said their injury occurred at work. The annual rate of finger amputations at work was 9.3 per 100,000 employed persons. The rate was higher for males (14.7) than females (1.9). The age-adjusted rates were higher for Hispanic (52.8) and black (28.9) males than for white males (9.5). Persons working with machines or maintaining them in the manufacturing industry were at highest risk. Unjamming or repairing machinery (e.g., presses, saws, or slicers) while in operation was particularly hazardous. These data can be used to target occupations and industries for specific worksite intervention to prevent finger amputations. One limitation of this study, however, is that hospitalized occupational finger amputations may not be representative of all finger amputations, the majority of which are less severe and do not require hospitalization. © 1993 Wiley-Liss, Inc.     

Fullerene C60研究进展

简单介绍Fulerene C_(60)的研究史和研究现状,详细介绍Fullerene的主要物性及应用前景。     

急性一氧化碳中毒患者血清细胞间黏附分子-1和超氧化物歧化酶的变化及临床意义

目的研究急性一氧化碳中毒(ACOP)患者血清细胞间黏附分子-1(ICAM-1)和超氧化物歧化酶(SOD)的变化及其临床意义。方法采用酶联免疫法和放射免疫法测定了84例ACOP患者血清ICAM-1和SOD水平,并与24例健康人对照比较。结果ICAM-1水平:轻度中毒者(362．40±82．80)ng/mL,中度中毒者(396．46±57．28)ng/mL,重度中毒者(624．67±50．18) ng/mL,明显高于健康对照者[(198．28±46．46)ng/mL,P＜0．05]。SOD水平:轻度中毒者(408．28±162．26)ng/mL,中度中毒者(386．64±215．63)ng/mL,重度中毒者(346．82±56．38)ng/ mL,明显低于健康对照者[(476．86±168．52)ng/mL,P＜0．05]。ICAM-1水平与病情程度呈正相关(r=0．48,P＜0．05),SOD水平与病情程度呈负相关(r=-0．54,P＜0．05)。结论ICAM-1和SOD与病情程度密切相关,ICAM-1和SOD可作为一氧化碳中毒患者病情的主要监测指标之一。     

Manifestations of hepatic cavernous hemangioma in carbon dioxidedigital subtraction angiography

Objective: To describe the characteristic appearance of cavernous hemangioma of the liver (CHL) presented in carbon dioxide digital subtraction angiography (CO2-DSA) and to evaluate the significance of CO2-DSA in the diagnosis of CHL. Methods: Both CO2-DSA and iodinated contrast DSA (IC-DSA) were performed in all 16 patients with CHL, and the angiographic manifestations in the same patients were compared. The image quality was rated by three experienced angiographers, and the complications were also assessed. Results: There was good correlation between angiographers on image quality (R = 0. 73). Diagnostic images were obtained with both CO2-DSA and IC-DSA in all CHL patients. No difference was noted between IC-DSA and CO2-DSA in visualizing the proper hepatic arteries and its branches (P>0. 05). CO2-DSA produced better images that clearly described the tumor size, shape and margination than those by IC-DSA (P< 0. 05), but both demonstrated characteristic appearances of early opacification and persistent     

Preparation of Small Gelatin and Albumin Microparticles by a Carbon Dioxide Atomization Process

Pharmaceutical Research -     

外源性一氧化碳改善供体肺功能的实验研究

目的观察一氧化碳(CO)对长时间低温保存的供体肺的保护作用。方法建立大鼠肺移植离体肺灌注实验模型:SD大鼠24只随机分为空白对照组、实验组(CO组),每组6对作为肺移植的供体鼠和受体鼠。对照组大鼠供肺移植全程吸入100%氧气直至再灌注后1h;CO组移植全程吸入500×10-6CO和O2的混合气,并且供体肺在冷保存的12h内肺内仍充盈着CO和O2的混合气,余同对照组。于供体肺循环灌注l,20,40,60min测定供肺氧合后动脉血氧分压(PaO2)、平均肺动脉压、气道峰压;灌注结束后测定肺组织湿干比、丙二醛(MDA)含量、髓过氧化物酶(MPO)活性、白细胞介素8(IL-8)的含量。结果作为受体的12只(每组6只)进入结果分析:①CO组供体肺的PaO2在再灌注20、40、60min明显高于对照组,平均动脉压、气道峰压分别在再灌注20、40、60min和40、60min明显低于对照组(P<0.05);②与空白对照组比较,CO组供体肺再灌注后湿干比、MDA、MPO、IL-8含量均明显降低(P<0.05)。结论在肺移植的全程吸入低剂量CO可以减轻供肺的缺血再灌注损伤,改善供肺功能。     

Endoscopic treatment of pharyngeal pouches: electrocoagulation vs carbon dioxide (CO2) laser

Endoscopic treatment of a hypopharyngeal diverticulum was performed in 75 patients during the period 1976-1990. Initially electrocoagulation was used to divide the septum between the diverticulum and oesophagus. More recently, the CO₂ laser combined with the operating microscope has been used. Although this has reduced the need for multiple endoscopic procedures compared to the electrocoagulation technique, this reduction was not statistically significant. In our follow-up group of patients, 49 (72.7%) were highly satisfied and 14 (19.6%) fairly satisfied. In this respect no significant differences between the electrocoagulation and laser group were found. Although we consider the use of the CO₂ laser and operating microscope as a technical improvement of the former Dohlman procedure, further assessment needs to be done to evaluate whether laser therapy docs offer an improvement in results.     

CO2部分重吸入法监测心排血量

目的　评价CO2 部分重吸入法监测心排血量的准确性。方法　对 2 0例择期神经外科患者同时应用CO2 部分重吸入法与温度稀释法监测心排血量 ,每隔 10min采集数据 (10对数据 )。结果　二者间具有高度相关性 ,相关系数r =0 .882 (P <0 .0 1)。结论　CO2 部分重吸入法监测心排血量无创伤 ,费用低 ,操作简单 ,在临床麻醉和术后监测中有一定的临床价值