Change in pulse rate with Enviro Chip and dummy chip fixed on radiation emitting devices like mobile phones/computers/laptops of users—A double blind crossover study

Use of Electronic gadgets such as mobile phones, computers/laptops constitutes an integral part of human day-to-day activity in offices and businesses. Therefore, their use cannot be stopped. These electronic gadgets emit electromagnetic radiations, which are believed to be hazardous to human health. World Health Organization/International Agency for Research on Cancer has classified radiofrequency electromagnetic fields as possibly carcinogenic to humans (Group B). The Enviro Chip developed by Synergy Environics, India, is a radiation harmonizing chip which when fixed on electronic gadgets at specific locations claims to reduce stress level by reducing the pulse rate of users which may also result in improvement of other health parameters. In this study, we have tested the ability of the Enviro Chip to reduce pulse rate of people who may have developed high pulse rate due to prolonged use of electronic gadgets. This was the double blind crossover study conducted in 205 healthy volunteers having an average pulse rate of above 82 per Minute at Max Healthcare India. The primary objective of the study was to evaluate and compare the change in pulse rate over 14 measurements with the use of both the Enviro Chip and a Dummy chip from average pulse rate at baseline without the Placebo effect. The secondary objective was to evaluate the change in pulse rate gender-wise. Data analysis was done using Wilcoxon Sign Rank test. The study demonstrated statistical significant reduction in pulse rate over 14 measurements with the use of Enviro Chip in both male and female healthy volunteers

The Application of Mobile Phone APP in the Follow-up Management of Hospital

Objective:Explore the application of mobile phone APP in the follow-up management of hospital in the information age,to build a harmonious doctor-patient relationship,improve the effective follow-up rate and promote the rehabilitation of patients.Methods:Compare and analyze the traditional telephone follow-up mode and the mode of mobile phone APP with telephone follow-ups.Results:In 2016,with telephone follow-ups only,the effective rate was 91.3%,the patient satisfaction rate was 92.6%.In 2017,besides telephone follow-ups,we used mobile phone APP,the effective follow-up rate got up to 96.2%,the satisfaction rate of patients got up to 98.1%.Conclusion:Compared with the traditional follow-up model,mobile phone APP follow-up model can improve the clinical follow-up service and the compliance of patients,help to reduce failures of follow-up.With mobile phone APP,it’s much more convenient and effective for doctors to communicate with patients,and it is better for the rehabilitation of patients with disease.

Stent-assisted coiling of intracranial carotid ophthalmic segment aneurysm segment aneurysms:Long-term follow-up from a single center

Background:To evaluate the efficacy of stent-assisted coiling(SAC)for the treatment of carotid ophthalmic segment aneurysm segment aneurysms(OSAs)of the internal carotid artery(ICA)through detailed long-term follow-up of a large patient cohort.Methods:We retrospectively analyzed 88 consecutive patients with OSAs between January 2009 and January 2020 at our center.Angiographic results were evaluated using the modified Raymond grading system and clinical outcomes were evaluated using the mRS scale.The primary endpoints were major aneurysm recurrence and poor clinical outcomes for at least 18 months of follow-up.The patients were asked to attend clinical follow-up assessments and possibly undergo DSA or MR via telephone.Results:We enrolled 88 patients with 99 OSAs treated with coiling,of whom 76 were treated with SAC.The coiling procedures were successful in all 88 patients.Overall,complications occurred in 8 patients(9.1%).No procedure-related mortality was observed.67(76.1%)experienced immediate aneurysm occlusion at the end of the procedure.Long-term angiographic follow-up(18 months)was available in 45/88 aneurysms(51%)(average 18.7±5.2 months).Four patients continued their follow-up for 5 years after initial aneurysm treatment.After a clinical follow-up time of 28.7 months(range,12-51 months),85 patients(95.5%)achieved favorable clinical outcomes(mRS scores of 0-2).Conclusions:This study indicates that SAC treatment is a safe and effective therapeutic alternative for ruptured and unruptured OSAs.The procedural risks are low with relatively long-term effectiveness.

Risk stratification of renal transplant recipients using routine parameters: Implication of learning from SARS-CoV-2 into transplant follow-up program

BACKGROUND Severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)infection is a global pandemic that is associated with a high risk of morbidity and mortality among recipients of solid organ transplantation.In the course of acute SARS-CoV-2 infection,various laboratory markers have been identified as predictors for high risk of mortality.AIM To risk stratify renal transplant recipients(RTxR)using general demographic parameters,comorbidities and routine laboratory markers for the severity of the disease and its outcomes.We believe that learning about these routinely monitored parameters can help us plan better strategies for the RTxR follow-up program.METHODS This present study includes RTxR who acquired SARS-CoV-2 infection from March 2020 to February 2021.We recorded the basic demographics,comorbidities and routine laboratory markers.We investigated the impact of SARS-CoV-2 infection on RTxRs and risk-stratified the progression of disease severity and outcomes in terms of recovery or mortality.RESULTS From 505 RTxRs in our renal transplant follow-up program,29(7.75%)RTxRs had PCR-positive SARS-CoV-2 infection.We recorded 8 deaths from SARS-CoV-2 infection giving an overall mortality rate of 1.6%but a significant 27.6%mortality in SARS-CoV-2 positive recipients.Age more than 68 years,non-Caucasian ethnicity and male gender were associated with a significant drop in survival probability;P≤0.001.<0.001 and<0.0001 respectively.87.5%of the deceased were diabetic;P≤0.0.0001.Estimated glomerular filtration rate of less than 26 mL/min/1.73 m2,serum albumin less than 20 g/L,Hemoglobin less than 9.6 g/L and serum calcium less than 1.70 mmol/L were all associated with significantly increased risk of mortality;P=0.0128,<0.001,<0.0001 and 0.0061 respectively.CONCLUSION This study has identified some routinely used modifiable parameters in predicting a higher risk of mortality and morbidity.This knowledge can be used in RTxR follow-up programs by addressing these parameters early to help reduce the morbidity and mortality in RTxRs.

Internet Video-Phone码率控制研究及实现

文章在F-VBR模型的基础上提出了自适应反馈码率控制算法,通过反馈确定视频编码帧率、编码目标比特率和量化参数,根据视频图像的内容对编码帧进行选择。在实际的视频电话系统Cool-Video中应用了该算法,取得了良好的效果。

Fifty-Year-Follow-up Results Compared with Shorter Follow-up of Breast Cancer Patients Undergoing Radical Mastectomy with or without Adjuvant Radiotherapy

Background: To evaluate the effect of follow-up length on the outcome of breast cancer patients, we compared the 50- and 25-year follow-up results in terms of cure rate, overall mortality and mortalities from breast cancer, second cancer, and benign diseases. Methods: 763 patients treated for breast cancer between February 1953 and September 1976, were followed up until December 2014. They were divided into two cohorts;earlier cohort exclusively underwent radical mastectomy plus adjuvant radiotherapy, while later cohort had radical mastectomy alone. Assuming that in all patients follow-up was terminated at 50 or 25 years after diagnosis, likelihood ratio test and stratified Log-rank tests were performed to evaluate the differences in cure rate and overall survival between the two cohorts. Results: During the 50 years, radical mastectomy alone compared with radical mastectomy plus adjuvant radiotherapy is associated with a significantly higher cure rate, and higher survivals regardless of whether the death was from breast cancer, second cancer, benign causes or any causes. However, if follow-up information is limited to 25 years, the advantage of radical mastectomy alone is partly offset and the survival difference between the two cohorts becomes less significant. Conclusion: Radiotherapy to breast cancer may adversely affect not only mortality from breast cancer, but mortalities unrelated to breast cancer. Since such deaths occur later, they may fail to be detected unless follow-up is long enough. Thus, deleterious effects of radiotherapy may be underestimated. Exceedingly long follow-up is required to accurately estimate the cure rate and the long-term effect of radiotherapy.

Acute Effect of Mobile Phone on Cardiac Electrical Activity in Healthy Volunteers

Background: A large number of publications have appeared in medical and scientific literature which show the hazardous effects of the mobile phone due to its radiofrequencies on reproductive system, autonomic nervous and immune system as well as cardiovascular system. However, so far the biological effect of the radiofrequency emitted from the mobile phone was not clear. Aim: To assess the effect of mobile phone on electrical cardiac activity by analysing the heart rate, QT interval, corrected QT Interval and QT dispersions while the mobile phone is to the proximity of heart. Settings and Design: This prospective, non-randomized study was carried out at private tertiary care hospital, for the period of 24 months. Methods and Material: One hundred healthy human volunteers were recruited in the study based on inclusion and exclusion criteria. The heart rate and 12-lead electrocardiogram (ECG) were recorded in all the participants (supine position) in 3 situations: without mobile phone, mobile phone switched on (not ringing), and mobile phone ringing. We performed statistical analysis of variance (p < 0.05) to compare the ECG variables in all three situations. Results: There was no statistically significant difference observed in heart rate and ECG variables (QT interval, corrected QT interval, QT dispersion) in three groups (p > 0.05). Conclusions: We conclude that the mobile phone positioned to the proximity of the heart has no effect on the heart rate or cardiac electrical activity.

Subjective and Objective Results of Native Anterior Vaginal Wall Repair in Local Anesthesia:A 10-Year Follow-Up

Introduction and Hypothesis: This follow-up study evaluates long-term subjective and objective outcome of native tissue anterior vaginal wall repair using local anesthesia. Methods: 72 women were operated. At 10-year follow-up anatomical results were evaluated by clinical examination. Furthermore, the women filled in a validated symptom and quality of life questionnaire. Results: Forty women (56%) completed the 10-year follow-up. Eighteen women (25%) had died within the ten-year follow-up period and fourteen women (19%) were lost to follow-up. Six (15%) of the women who came for follow-up had been reoperated for anterior vaginal wall prolapse within the 10-year follow-up period and were analysed as a separate group. Of the 40 women who came for the 10-year clinical examination none had stage 0 pelvic organ prolapse. Twenty (50%) women had stage 1, whereas, 13 (32%) had stage 2 and 1 (3%) had stage 3 pelvic organ prolapse. Ten years after surgery, 28 women (70%) had no bulge symptoms. Six (15%) of the women experienced bulge symptoms at the time of follow-up. Ten years postoperatively, 30 (75%) of the women in an overall quality of life assessment considered their condition improved after surgery. Conclusion: At 10-year follow-up 70% of women were relieved from their bulge symptoms and 75% still considered themselves better or much better than before the operation. However, 15% of women had been reoperated and 15% still experienced bulge symptoms.

小学生手机成瘾的特点及影响因素分析

为调查小学生手机成瘾的特点及影响因素,在甘肃省白银市城镇和农村小学中分层随机抽样选取了670名1~6年级小学生作为调查对象,采用《小学生手机使用情况调查表》《手机成瘾指数量表》,对小学生使用手机的基本情况和手机成瘾程度进行调查和分析,旨在调查小学生手机成瘾的特点及影响因素。结果显示:小学生使用手机的时段集中于下午和晚上,使用时长周内平均1.6小时,周末平均3.2小时;观看短视频、微信聊天、手机游戏、在线学习是小学生使用手机最为主要的内容;小学生手机成瘾倾向的检出率平均值为23.9%;城镇小学生手机成瘾程度显著低于农村;随着年级增高,小学生手机成瘾程度加重;父母学历水平越高,小学生手机成瘾程度相对较低;年级、家庭所在地以及父母学历水平三个变量对小学生手机成瘾具有显著预测作用。

游离和固结金刚石磨料抛光手机面板玻璃的试验研究

选取不同粒径的金刚石微粉,采用游离磨料和固结磨料两种抛光方法加工手机面板玻璃,比较其材料去除率和抛光后工件表面粗糙度。结果表明:在相同的抛光工艺参数下,磨粒粒径在游离磨料抛光中对材料去除率和抛光后表面质量作用显著,而在固结磨料抛光中作用不显著;采用金刚石固结磨料抛光垫抛光能获得表面粗糙度约为Ra1.5 nm的良好表面质量,并在抛光过程中较好地实现了自修整功能。

基于Android平台的脉搏波监测系统的研究

随着现代医学的快速发展,健康监护系统逐渐趋于成熟,可穿戴的监护系统越来越受欢迎;在此背景下提出了一种基于Android平台的便携式健康监测系统;利用光电探测电路获取光电容积脉搏波(photoplethysmography,PPG)信号,通过微处理器(MSP430)转换此信号为数字信号,然后使用蓝牙模块将数字信号发送至Android智能手机;在Android智能手机上开发应用软件,实现对PPG信号的波形显示、数据存储功能和生理参数的计算;为验证其可行性,分别对10名被测者进行了PPG信号的采集、传输、存储和心率的计算,将实验测得的心率数据与监护仪测量数据通过Bland-Altman差值法进行一致性检验,结果显示两种心率测量方法有很好的一致性;进一步的研究将在此基础上开发可监测更多参数的健康监护系统。

泰安市大学生手机依赖现状与影响因素分析

目的了解泰安大学生手机依赖的现状及影响因素,为进一步的研究和制定群体干预措施提供科学依据。方法采用分层抽样方法对泰安三所高校2009～2011级不同专业(理工科,文科,医学类)的550名大学生进行问卷调查,采用χ2检验和Logistic回归分析,研究泰安市大学生手机依赖的现状及影响因素。结果大学生手机拥有率为99.4%。大学生手机依赖症发生率为24.7%,理工科学生发生率33.7%,文科生27.8%,医学生13.8%;不同专业大学生对手机依赖症发生率有统计学差异(P<0.05)。经Logistic回归分析,使用手机的时间越早,手机价位越高,产生手机依赖症的危险性越高;所学专业与手机依赖症发生有统计学联系。结论泰安大学生手机依赖症发生数约占大学生的四分之一,已有必要对产生手机依赖症的学生进行心理疏导和行为矫正;家长应该避免让学生过早使用手机。

安卓手机终端原始GNSS观测数据质量分析

为了弥补当前手机端原始GNSS观测数据的定性质量分析相关研究较少的不足,提出通过将手机与测地型接收机同时同地点进行观测的方法来对比分析手机端原始GNSS观测值的数据质量,被评价的手机品牌有华为P10、华为荣耀9和小米8。实验结果表明:大部分智能手机能够观测到单频伪距和载波相位数据,有些最新产品能接收到双频GNSS数据,观测到的GPS和GLONASS卫星数目和测地型接收机观测结果接近;手机端观测有时会出现频繁的信号失锁现象,且载波观测值存在大量的粗差或原因不明确的系统误差;手机端同时刻伪距观测值和载波观测值变化率不一致,判断其原因是伪距和载波观测采用不同的时钟,造成二者钟速之差在观测时段内缓慢变化;手机伪距观测值中误差为4~10 m,BDS卫星伪距观测值精度高于其他卫星;以载波观测值变化率平滑性作为评价指标,手机端载波观测值数据质量比测地型接收机差4~6倍。

“互联网+回收”背景下上海市废旧手机资源化政策探讨——兼论电子废弃物资源化企业信用评级

上海市常住人口多,废旧手机数量巨大。手机入围《废弃电器电子产品处理目录(2014版)》,因而废旧手机资源化备受关注。2015年《循环经济推进计划》中提出我国将探索"互联网+回收"的模式及路径。"互联网+回收"的落实需要政府和金融手段的支持,信用评级能够降低信息不对称,对上海市电子废弃物资源化企业和电器电子产品生产企业进行信用评级,将信用评级报告提供给政府、市场、银行等金融机构,不但为政府的资源配置、金融机构的信贷决策等提供依据,而且在回收企业监管、绿色设计减征基金、扩大基金来源、落实国务院政策等方面具有重要作用,是对上海市废旧手机资源化政策的有益探索。

Readmission rate and early complications in patients undergoing total knee arthroplasty:A retrospective study

BACKGROUND Total knee arthroplasty(TKA)can improve pain,quality of life,and functional outcomes.Although uncommon,postoperative complications are extremely consequential and thus must be carefully tracked and communicated to patients to assist their decision-making before surgery.Identification of the risk factors for complications and readmissions after TKA,taking into account common causes,temporal trends,and risk variables that can be changed or left unmodified,will benefit this process.AIM To assess readmission rates,early complications and their causes after TKA at 30 days and 90 days post-surgery.METHODS This was a prospective and retrospective study of 633 patients who underwent TKA at our hospital between January 1,2017,and February 28,2022.Of the 633 patients,28 were not contactable,leaving 609 who met the inclusion criteria.Both inpatient and outpatient hospital records were retrieved,and observations were noted in the data collection forms.RESULTS Following TKA,the 30-day and 90-day readmission rates were determined to be 1.1%(n=7)and 1.8%(n=11),respectively.The unplanned visit rate at 30 days following TKA was 2.6%(n=16)and at 90 days was 4.6%(n=28).At 90 days,the unplanned readmission rate was 1.4%(n=9).Reasons for readmissions included medical(27.2%,n=3)and surgical(72.7%,n=8).Unplanned readmissions and visits within 90 days of follow-up did not substantially differ by age group(P=0.922),body mass index(BMI)(P=0.633),unilateral vs bilateral TKA(P=0.696),or patient comorbidity status(30-day P=0.171 and 90-day P=0.813).Reoperation rates after TKA were 0.66%(n=4)at 30 days and 1.15%(n=8)at 90 days.The average length of stay was 6.53 days.CONCLUSION In this study,there was a low readmission rate following TKA.There was no significant correlation between readmission rate and patient factors such as age,BMI,and co-morbidity status.

基于智能手机的生命参数检测方法研究

智能手机可用于老年人和慢病患者生命特征参数及其变化的监测,降低意外生命安全风险。文章介绍了基于智能手机传感器检测生命体征参数的方法,研究了一种新的基于算法融合的检测方法,提出了两套手机集成监测方案并实现了相应的演示系统。通过与专业检测设备对比,验证了方法的有效性。

基于鉴相器的手机瞬时心率监测软件设计

目前用手机摄像头监测心率的手机软件无法检测瞬时心率,因为手机上资源有限,而占用资源较少的主要检测方法差分阈值法需要根据一段时间的结果来设定阈值才能准确检测出心率,不适于瞬时心率的检测.针对以上问题提出了一种基于鉴相器的瞬时心率检测算法,通过手机摄像头检测出的脉搏波信号先与正弦参考信号相乘,再经过低通滤波器提取心率成分,根据相位的变化逐拍检测心率的变化.在Android智能手机上的实验结果表明,与ECG方法相比,计算精度能满足要求.与差分阈值法和滤波器组法相比,本文提出的方法能较快地检测出瞬时心率.

驾驶员驾车使用手机对其心率变异性的影响

为了定量分析在驾车过程中驾驶员使用手机进行通话时对其造成的生理负担,设计仿真实验研究一般性电话通话、微信语音通话和干扰性电话通话三种不同形式通话时对驾驶员心率变异性的影响。基于Logitech仿真驾驶器,设计了实验内容与流程,分一般性电话通话、微信语音通话和干扰性电话通话三种使用手机通话方式下,在城市仿真道路上进行模拟驾驶。通过MINDWARE系统采集驾驶员在整个驾驶过程中的心率变异性各指标。分析得到三种使用手机通话方式下驾驶员的心电波形图、心搏间期序列、心动间期时间序列的频谱等;根据心率变异性各指标变化得出使用手机对驾驶员生理的影响。结果发现:无论在哪种通话方式下,驾驶过程中使用手机前后心率发生明显变化,呼吸功率谱中峰值频率、平均呼吸振幅、心率平均值和呼吸速率增大,心搏间期值降低;心电波形图的心跳频率增大,心搏间期序列的峰值降低、心搏间期变短,心动周期时间序列的峰值升高、周期变短。从心率变异率的各指标的变化值来看:微信语音通话对驾驶人心率变异性指标的影响最大,干扰性电话通话次之,一般性电话通话影响最小。

一种具有交换功能及速率可变的IP电话技术

将具有交换功能以及速率可变的IP电话技术应用于SDH设备中,这样可以解决传统二线电话在SDH设备中只能点对点呼叫、占用固定带宽的缺点I,P电话之间可互相呼叫并调整占用的带宽。主要介绍了将IP电话技术应用于SDH设备组网的设计方案。