一种微电脑骨伤电疗仪的研制

介绍一种微电脑骨伤电疗仪,简述其原理,硬件组成和系统功能,临床实验证实,该骨伤电疗仪具有操作简单、智能化和安全可靠的特性,市场和应用前景很大。     

高压电场鼻炎治疗仪

在鼻炎治疗技术中,除采用药物治疗和手术治疗外,还采用各种理疗仪器治疗。在各种理疗仪器中,已知的有获CN89216252.X专利的鼻疾电疗仪、获CN88216105.9专利的鼻炎电疗仪、获CN87214599专利的直流低压微型鼻炎治疗仪。鼻疾电疗仪采用直流电导入药物离子进入病患处的原理治疗鼻炎,它是采用多种药物和直流电治病,具有结构简单,携带方便的特点,但仍要药物治疗。鼻炎电疗仪以单点或双点小面积接触患处,利用伽伐尼电荷运     

TD—1音频交叉电疗仪的研制

本文报导了一种音频交叉电疗仪的结构，原理，治疗特点及临床试用效果。     

超短波电疗仪故障的检修

超声电疗仪是一种很重要的常用设备 ,在医院使用非常广泛 ,对康复理疗有很好的疗效。使用过程中 ,出现故障需要尽快解决 ,确保按时治疗。现将上海产ＬＤＴ·ＣＤ31型超短波电疗仪 ,在治疗过程中常见的故障及检修方法介绍如下。1 电流表指示高达 30 0ｍＡ以上 ,瞬间烧保险。故障部位 :ＦＵ - 811振荡管其中一只或二只含气造成高压短路。处理方法 :打开机壳 ,换上一只比原机稍小一点的保险管。瞬间加高压后立即关断 ,看到振荡管发出粉红色的就是坏管 ,换上新管即可。2 电流表指示为零 ,瞬间烧保险。故障部位 :高压硅堆 (886)参数变差或击穿。…     

超短波治疗机的保养及维修

1超短波治疗机的工作原理超短波治疗机在医院的理疗医学上有着广泛的应用。超短波治疗机的工作原理是利用两支电子管F-811互补推挽输出给LC振荡电路,使其谐振产生高频电磁波及热能通过极板的形式发出高频电场,渗透到人体的表层和深部组织,使其受热均匀;加速血液循环,提高机体组织的新陈代谢。高频电磁波还有抑制细菌生为、促进积液吸收、消     

章医生咨询台

目前市面上出现不少家庭用的带电脑或不带电脑的电疗仪,请问这些电疗仪的疗效如何?     

TC1超短波电疗机使用注意事项及故障分析

本文介绍了TC1超短波电疗机的原理、使用注意事项及常见故障分析与排除方法 。     

如何识别电疗仪

近来,一些低、中频电疗仪相继进入家庭,但市场上这些仪器名称繁多,颇令人迷惑不解.如有根据电流特征命名的感应电治疗仪、间动电治疗仪、音频电疗仪、调制中频治疗仪等,还有依治疗疾病命名的骨质增生治疗仪、胆石症治疗仪、风湿治疗仪等,它们其实也是低、中频电疗仪,也决非专治某种疾病.拿骨质增生治疗仪来说,它是一种脉冲直流电,既可导入药物治疗退行性骨关节病(俗称骨质增生),也可以不用导入药物治疗其它疾病.所以,很有必要普及识别电疗仪的常识.     

一种智能型多功能电疗仪

SZD—8702微电脑综合电疗仪是一种采用现代微型计算机技术,集低中频脉冲电流于一机,能开展多种类型的低中频电疗的智能型可编程控的多功能电疗仪。     

如何识别电疗仪

近来,一些低、中频电疗仪相继进入家庭,但市场上这些仪器名称繁多,颇令人迷惑不解.如有根据电流特征命名的感应电治疗仪、间动电治疗仪、音频电疗仪、调制中频治疗仪等,还有依治疗疾病命名的骨质增生治疗仪、胆石症治疗仪、风湿治疗仪等,它们其实也是低、中频电疗仪,也决非专治某种疾病.拿骨质增生治疗仪来说,它是一种脉冲直流电,既可导入药物治疗退行性骨关节病(俗称骨质增生),也可以不用导入药物治疗其它疾病.所以,很有必要普及识别电疗仪的常识.     

Validación de dos versiones cortas de la escala para depresión del Centro de Estudios Epidemiológicos en adolescentes colombianos

ObjectiveTo establish the validity and reliability of a Brief and Ultra-short Center for Epidemiological Studies Depression (CES-D) Scale in adolescents.DesignValidation study.SettingSecondary schools in Bucaramanga, Colombia.ParticipantsA total of 474 students were selected through a three stage process; 68 did not agree to participate, 8 were excluded and 8 did not complete the process.Main measurementsAdolescent students were evaluated with CES-D and the clinical interview for Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition. The CES-D scale was re-applied 3 to 28 days after the first application. The ten items and the three items with the highest correlation with total score were selected to construct a Brief scale and Ultra-short scale, respectively. Construct validity, criterion validity, test-retest reliability and internal consistency were analyzed.ResultsFor the Brief CES-D Scale the Cronbach's alpha was 0.86 and Lin's coefficient was 0.77. The area under ROC curve was 0.83, with a sensitivity of 77.8%; specificity 74.1%. Two main factors were identified to explain the 55.81% variance. For the Ultra-short Scale the Cronbach's alpha was 0.76 and Lin's coefficient was 0.74. The area under ROC curve was 0.80, with a sensitivity of 75.56%; specificity 70.67%. One main factor was identified to explain the 68.19% of variance.ConclusionsThe Brief and Ultra-Short CES-D Scale are as useful as the original scale for the screening of MDD in adolescents; Ultra-short CES-D Scale does not preserve the original factorial structure.     

单侧多功能外固定支架在胫腓骨骨折治疗中的应用

目的评价单侧多功能外固定支架在胫腓骨骨折的临床疗效,探讨该治疗方法的操作要点。方法利用小切口单侧多功能外固定支架治疗胫腓骨骨折246例,其中闭合性骨折98例,开放性骨折148例。结果随访时间8～16个月,1例骨不连行二次手术,2例延迟愈合,243例临床愈合,临床疗效满意。平均拆除外固定支架时间为6.3个月。结论利用小切口单侧多功能外固定支架治疗胫腓骨骨折具有创伤小,操作简单,可早期功能锻炼、防止关节粘连和肌肉萎缩,避免二次手术等优点。对开放性骨折和复杂性骨折的治疗有较好的疗效。     

毫米波治疗仪器的现状与未来

毫米波治疗仪器大体可分为四种类型：固定频率的治疗仪,可变频率的治疗仪;连续频谱的治疗仪以及诊断和治疗相结合的综合治疗仪,介绍了这四类仪器的典型代表及组成,展望了未来的发展趋势。     

Estimating Causal Effects With Propensity Score Models: An Evaluation of the Touch Condom Media Campaign in Pakistan

Rapid population growth in Pakistan poses major risks, including those pertinent to public health. In the context of family planning in Pakistan, the current study evaluates the Touch condom media campaign and its effects on condom-related awareness, attitudes, behavioral intention, and behavior. This evaluation relies on 3 waves of panel survey data from men married to women ages 15–49 living in urban and rural areas in Pakistan (N = 1,012): Wave 1 was March 15 to April 7, 2009; Wave 2 was August 10 to August 24, 2009; and Wave 3 was May 1 to June 13, 2010. Analysis of variance provided evidence of improvements in 10 of 11 condom-related outcomes from Wave 1 to Wave 2 and Wave 3. In addition, there was no evidence of outcome decay 1 year after the conclusion of campaign advertising dissemination. To help compensate for violating the assumption of random assignment, propensity score modeling offered evidence of the beneficial effects of confirmed Touch ad recall on each of the 11 outcomes in at least 1 of 3 time-lagged scenarios. By using these different time-lagged scenarios (i.e., from Wave 1 to Wave 2, from Wave 1 to Wave 3, and from Wave 2 to Wave 3), propensity score modeling permitted insights into how the campaign had time-variant effects on the different types of condom-related outcomes, including carryover effects of the media campaign.     

自动凯氏定氮仪与玻璃蒸馏仪测定食品中二氧化硫的比较

目的比较全自动凯氏定氮仪与玻璃蒸馏仪测定食品中二氧化硫的效果。方法采用全自动凯氏定氮仪与玻璃蒸馏仪蒸馏样品中二氧化硫，按国标蒸馏滴定法测定样品中的二氧化硫含量，两法测定结果进行比较。结果全自动凯氏定氮仪与玻璃蒸馏仪蒸馏法测定结果一致，经统计学处理，差异无显著性，相对偏差小于4．89％。结论采用全自动凯氏定氦仪蒸馏测定二氧化硫，方法简便，省时省力，结果准确可靠，适合各种样品中二氧化硫的蒸馏测定。     

Infertility treatment and fertility-specific distress: A longitudinal analysis of a population-based sample of U.S. women

Because research on infertile women usually uses clinic-based samples of treatment seekers, it is difficult to sort out to what extent distress is the result of the condition of infertility itself and to what extent it is a consequence of the experience of infertility treatment. We use the National Survey of Fertility Barriers, a two-wave national probability sample of U.S. women, to disentangle the effects of infertility and infertility treatment on fertility-specific distress. Using a series of ANOVAs, we examine 266 infertile women who experienced infertility both at Wave 1 and at Wave 2, three years later. We compare eight groups of infertile women based on whether or not they have received treatment and on whether or not they have had a live birth. At Wave 1, infertile women who did not receive treatment and who had no live birth reported lower distress levels than women who received treatment at Wave 1 only, regardless of whether their infertility episode was followed by a live birth. At Wave 2, women who received no treatment have significantly lower fertility-specific distress than women who were treated at Wave 1 or at Waves 1 and 2, regardless of whether there was a subsequent live birth. Furthermore, fertility-specific distress did not increase over time among infertile women who did not receive treatment. The increase infertility-specific distress was significantly higher for women who received treatment at Wave 2 that was not followed by a live birth than for women who received no treatment or for women who received treatment at Wave 1 only. These patterns suggest that infertility treatment is associated with levels of distress over and above those associated with the state of being infertile in and of itself.     

Persistence of personal health practices over a 1-year period

A large amount of research has been devoted to identifying the psychosocial and demographic correlates of personal preventive health practices. An additional factor to consider, however, is the stability of personal health practices over time. At least over short periods, the prediction of current behavior may be substantially improved by having information about an individual's previous performance of the practice being studied. To address this question, data from Wave 1 (1979) and Wave 2 (1980) of the National Survey of Personal Health Practices were examined. Using nine health practices as indices, performance reported at Wave 1 was used to predict performance of that same practice as reported at Wave 2, 1 year later. A two-step analysis strategy was followed to estimate how much more variance could be explained when the behavioral reports were added to a list of psychosocial and demographic predictors. Results showed that over the 1-year interval, the Wave 1 behavioral reports were by far the strongest predictors of their corresponding measures obtained at Wave 2. The explained variance was increased substantially for most of the nine health practices, suggesting a strong tendency for persistence of the practices. Psychosocial and demographic variables tended to account for much smaller amounts of variance and often dropped out of the prediction equation when the Wave 1 behavior report was entered in the second step of analysis. Health practices other than the corresponding Wave 1 index did not improve prediction of the Wave 2 index greatly. The tendency for previous behavior to persist may overshadow the influence of other factors and account for the modest amounts of explained variance that are usually found for psychosocial and demographic indices in cross-sectional surveys. Although stability does not imply rigidity or impossibility of change, the strength of prediction found in these data attest to the "force of habit" that community interventions can encounter.     

Physically demanding workloads and the risks of musculoskeletal disorders in homecare workers in the USA

Although musculoskeletal disorders (MSDs) are prevalent among homecare workers, little is known about the MSD risk factors. This study investigated whether physically demanding workloads among homecare workers are related to MSDs, especially in neck, shoulder and back pain. Data were taken from two waves of a random sample (June to December 2003 and December 2003 to February 2004). The sample included 1643 homecare workers at Wave 1 and 1198 homecare workers at Wave 2, respectively. A basic telephone interview and 30 minutes computer‐assisted interview were performed for homecare workers in Wave 1 and Wave 2. The prevalence of neck, shoulder and back MSDs was assessed at Wave 1 and Wave 2 using the Nordic questionnaire of musculoskeletal symptoms. The incidence of MSDs at 6 months was estimated at Wave 2 using only those who were in the asymptomatic reference group at Wave 1 as the denominator. At Wave 1, back MSDs were the most prevalent (10.2%), followed by neck (9.6%) and shoulder (7.1%) MSDs. After 6 months, the incidence of neck MSDs was the highest (7.0%), followed by back (6.4%) and shoulder (4.8%) MSDs. Physical demands of work were assessed using items developed from focus groups of workers. When compared with asymptomatic workers, those with MSDs showed a dose–response effect for physical job demands. After controlling for age, psychosocial demands and social support on‐the‐job, physical demands among homecare workers were significantly associated with an excessive odds of neck, shoulder and back MSDs incident at 6 months (odds ratios of 1.14–1.17 for each unit increase on a physical demand scale). Our study shows that the physical demands of work are a significant risk factor for MSDs among homecare workers. Considering the high physical demands among homecare workers, the finding in this study clearly indicates that practical intervention strategies should be implemented to protect homecare workers from exposure to MSD risk factors.     

Prospective study on the reciprocal relationship between intimate partner violence and depression among women in Korea

This study aimed to examine the bi-directional relationship between intimate partner violence (IPV) and depression using prospective data. Data from the Korean Welfare Panel Study (KOWEPS) were used to test whether IPV was associated with an increased overall level of depression and with the rate of change over time in depressive symptoms and whether this model of change in depressive symptoms was associated with subsequent incidences of IPV.This study utilized data from 3153 married women who participated in the KOWEPS from 2006 through 2009. The KOWEPS is a panel study of a nationally representative sample of Korean households. The women's responses to multiple questions adopted from the Conflict Tactics Scale (CTS) were used to create a dichotomous IPV variable at Wave1 and Wave4. The CESD-11 was used to measure the women's level of depression. We utilized a latent growth model (LGM) of depression using IPV at Wave1 as a predictor and IPV at Wave4 as an outcome predicted by the model parameters of the LGM of depression.We found that after controlling for the effects of age, education, social support and income, IPV at Wave1 was positively associated with overall depression levels and negatively associated with the growth rate of depression. Further, IPV at Wave4 was associated with the intercept and the slope of the depression LGM and with IPV at Wave1. The overall model fit the data well.This study indicated that experiencing IPV influences a woman's level of depression in terms of its overall level and rate of change, which, in turn, influences the victim's likelihood of experiencing subsequent IPV.     

用生化酶标仪测试血红蛋白的微量检测方法

采用国产生化酶标分析仪，建立一种简便、实用的血红蛋白微量比色检测方法，经临床应用表明，此法快速、准确、重复性好。