体表电位标测微机系统(Ⅰ型)

本系统的107个电极中,103个分布于胸、背部,1个为参考电极,1个为V_3,其余用于肢导。本系统除能绘出2、4、8ms任意间隔的103通道同步的体表等电位图,常规12导联和V_(7 9)心电图,胸、背部位的心电图外,还可记录R峰值等电位图,∑R,Q波等电位图,nQ30、40,极大、极小轨迹图等。     

螨类接种豚鼠气管引起的肺部病变

本文首次报导了螨类接种豚鼠气管所引起的肺部病变。螨类接种后的第6天发现肺部已形成典型的结节性病灶。结节呈圆锥形,淡黄色,直径1～5mm之间。镜下主要表现为细支气管和细支气管周围的病变。和早年报导的猴肺螨病肺部病变比较,有以下不同,肺实质内有明显的异物肉芽肿形成,炎症反应中嗜酸性细胞浸润不明显,而有更多的异物巨细胞形成;细支气管周围的小动脉受到损害:部分小动脉壁平滑肌明显增厚,以致腔隙变窄,部分小动脉腔内可见到虫体。根据我们实验研究证明,螨类接种豚鼠气管可引起肺部的典型病变.因而认为用豚鼠作为肺螨病的动物模型是有希望的。     

广西壮、汉族体重指数与血压、血脂、脂肪肝等相关因素的关系

目的：探讨广西地区人群体重指数（BMI）与血压、血糖、血脂、脂肪肝、心电图异常、性别、民族及其他心脑血管病史等因素的相关性，并比较这些因素在壮族与汉族人群中的差异。方法：对在本院及田阳县、田东县参加体检的1105例壮族与汉族人群询问病史并检查身高、体重、血压、空腹血糖、血脂、肝脏B超、心电图等。结果：在按制其他因素后，汉族人群BMI与脂肪肝、舒张压水平及高血压病史呈密切正相关关系，男性BMI高于女性；壮族人群BMI与脂肪肝、血清甘油三酯浓度及收缩压水平有密切正相关关系，汉族人群的年龄、BMI、血清甘油三酯浓度、胆固醇浓度、收缩压水平、脂肪肝检出率及心电图异常检出率均较壮族人群高。结论：肥胖与脂肪肝、血压、血脂密切相关，且广西汉族人群肥胖、脂肪肝、高血脂、高血压及心电图异常较壮族人群更常见。     

Symptoms of contruction workers exposed to whole body vibration and local vibration

Summary To study the effects of construction machinery operation on subjective symptoms, a questionnaire survey was caried out among construction machinery operators by a self-reporting method. Subjects were 184 power shovel operators, 127 bulldozer operators, 44 forklift operators as operator groups, and 44 office workers as a control. Their ages were in a range of 30–49 years. The questionnaire contained 20 symptoms referring to fatigue, digestive problems, and upper or lower limbs or back problems. The prevalence rate and symptom characteristics were examined. The dominant symptoms of the operator groups were stiff shoulder, low back pain, and stomack symptoms. The prevalence rate of low back pain was significantly different between forklift operators and controls. No significant differences were found in the symptoms of upper limbs and fingers between operator groups and controls. The prevalence of Raynaud's phenomenon was 0.5%–2.3% in the operator groups and 2.3% in the control group.     

Thoracoscopic Retrieval of Foreign Bodies After Penetrating Chest Trauma

Video-assisted thoracic surgery or thoracoscopy has proved to be valuable in many settings in thoracic surgery. The use of video-assisted thoracic surgery in trauma has been limited, especially with respect to penetrating trauma. We report the use of thoracoscopy to remove intrathoracic fragments of glass and avert the need for a thoracotomy.     

Voluntary head stabilization in space during oscillatory trunk movements in the frontal plane performed in weightlessness

 The ability voluntarily to stabilize the head in space during lateral rhythmic oscillations (0.59±0.09 Hz) of the trunk has been investigated during microgravity (μG) and normal gravity (nG) conditions (parabolic flights). Five healthy young subjects, who gave informed consent, were examined. The movements were performed with eyes open or eyes closed, during phases of either μG or nG. The main result was that head orientation with respect to vertical may be stabilized about the roll axis under μG with, as well as without vision, despite the reduction in vestibular afferent and muscle proprioceptive inputs. Moreover, the absence of head stabilization about the yaw axis confirms that the degrees of freedom of the neck can be independently controlled, as was previously reported. These results seem to indicate that voluntary head stabilization does not depend crucially upon static vestibular afferents. Head stabilization in space may in fact be organized on the basis of either dynamic vestibular afferents or a short-term memorized postural body schema. Received: 4 October 1995 / Accepted: 30 September 1996     

利用生物电阻抗测量人体脂肪的研究

本文根据瘦体组织电传导远比脂肪组织强的原理，研制了人体脂肪分析仪（ＢＦＡ），采用４个电极，引出无痛信号（８００μＡ、５０ｋＨｚ）进入人体，测试电阻抗（Ｚ），编入计算机软件，运算人体脂肪量。选择３０名１８～２０岁男性青年进行测量条件试验，得出食后半小时，上午、下午检测均可，喝少量水（少于５００ｍｌ）对测量无明显影响（Ｐ＞０．０５）。另选５２名受试者（男９，女４３）年龄１９～６５岁，对用ＢＦＡ测量的Ｚ、体脂百分比（％ＢＦ）和用美国ＢＣ一３００人体成分分析仪测量的电阻（Ｒ）、％ＢＦ进行了相关分析，ｒ值分别为０．９９５（Ｓ（ｙ．ｘ））＝７．９７，Ｐ＜０．０１）和０．９９６（Ｓ（ｙ．ｘ））＝０．６１，Ｐ＜０．０１）。最后，用ＢＦＡ对７９名健康人（男２２，女５７）、年龄３９．０±１１．８岁、身高１６３±７．０ｃｍ、体重６３．１±１０．２ｋｇ测量体脂，男性体脂２２．５±９．２％，女性体脂３４．７±７．２％，用体脂判断肥胖比用体重判断肥胖发生率高，特别是女人、中老年人更明显。     

Insults to the body civil: Mistreatment of elderly in two Plains Indian tribes

The mistreatment of elderly is subject to various social constructions. On two geographically distinct Plains Indian Reservations which we call Lone Mountain and Abundant Lands, the abuse or neglect of elderly is construed as a health problem which is a dysfunction of the community as a whole. Both physical abuse and neglect are more common on the Lone Mountain Reservation, occurring in association with other indicators of community disorganization such as unemployment and substance abuse. On the Abundant Lands Reservation physical abuse was categorically denied and what neglect existed appeared to be a function of role strain, geographic dispersal, climate and terrain. We attribute differences in the prevalence of mistreatment of elders to variations in economic opportunities for younger residents. Examining the historical and present contexts of intergenerational relationships on the reservations, we discuss the implications of this study for social exchange theory and policy applications.This research was supported by the Gerontological Society of America AppliedThis research was supported by the Gerontological Society of America AppliedThis research was supported by the Gerontological Society of America AppliedThis research was supported by the Gerontological Society of America AppliedThis research was supported by the Gerontological Society of America AppliedThis research was supported by the Gerontological Society of America Applied     

低剂量γ射线全身照射对猴免疫功能的影响

目的　探索大动物低剂量全身照射的适宜剂量 ,以便评价低剂量全身照射应用于临床的可能性。方法　食蟹猴 32只随机分为 4组 ,用γ射线 (吸收剂量率为 0 175mGy min)分别照射0、30、5 0和 75mGy。分别在环磷酰胺处理前、后 ,亦即照射前和照射后 1、2、8、33和 5 0周检测淋巴细胞亚群、免疫球蛋白及自然肿瘤红细胞花环试验 (NTERT)。结果　结果显示白细胞释放细胞因子尤其是CD1 6 参与免疫调控 ,出现时间 剂量的反应 ;体液免疫中以IgA升高为特征 ,照射后第 8周 5 0和75mGy 2个剂量组与对照组相比差异有显著性 (P <0 0 5 ) ;NTERT结果显示 ,在照射后第 2周 ,第 1、2、3组分别与第 4组相比差异有显著性 (P <0 0 5 ) ,但第 1组分别与第 2、3组相比差异无显著性。结论　γ射线单次低剂量全身照射对免疫功能低下模型的食蟹猴红、白细胞免疫功能有增强其免疫功能的作用。