Development of a micro-monitoring system based on the liquid crystal display

INTRODUCTION　　 The most commonly monitored vital life signs in humans are the electrocar-diogram,blood pressure,breath,heart rate and body temperature.Monitoring ofvital signs is the one of the main methods for the doctor to understand the state ofpatie…     

Design of Calibration Device for Pulse Oximeter Simulator

Saturation of peripheral oxygen （SpO2） is one of the most important parameters of vital signs. Pulse oximeter based on near-infrared spectroscopy is commonly used as a non-invasive method to measure SpO2 yl. Currently, medical device manufacturers as well as metrology measurement agencies in China usually use pulse oximeter simulator as the commonly accepted functional calibration equipment for pulse oximeters. So far, no experimental protocol or devices can be used to test the accuracy and reliability of a pulse oximeter simulator. Therefore, a set of new metrology apparatus with the name of calibration device for pulse oximeter simulator have been designed in order to make a traceable system for the calibration or verification of pulse oximeter simulators. The principles and some research methods of this calibration device for pulse oximeter simulator will be discussed in this paper. Besides that, many experiments have been applied in order to guarantee the accuracy as well as traceability of this set of device.     

New Artificial Heart Integrates Parts Taken from Cow

In a new step forward in artificial heart technology, French medical company has developed a new artificial heart that is part bovine and part machine. The idea behind this design was to use actual bovine tissue for parts of the artificial heart that would come in contact with a wearer＇s blood, thus leading to greater biocompatibility. Their design consists of two chambers separated by a membrane taken from a cow＇s heart. One chamber houses the wearer＇s actual blood and the other chamber houses hydraulic fluid that is driven by a motor to exert force on the membrane, thereby causing flow in the chamber housing blood, leading to circulation. In addition to the dividing membrane being made of bovine tissue, the heart valves are also made of components taken from cows. The bovine components used to make the valve not only serves the purpose of greater biocompatibility, but is also equipped with embedded sensors to measure the pressure on them. Such measurements could be used to monitor exertion and adiust ＂hear rate＂ as needed.     

载伺服系统 ,特别适用于战术导弹的控制 .Design

d-order observer to estimate its mode, disturbance can be compensated. This enables the system to resist sinusoidal disturbance with any magnitude. Estimate of angular velocity is used as the state feedback to replace the expensive gyro and tachometer generator. The modified method excels the traditional, and provides a new way for the design of tank fire control system. It     

Analysis and Management System of Digital Ultrasonic Image

This paper presents the analysis and management system of digital ultrasonic image. The system can manage medical ultrasonic image by collecting, saving and transferring, and realize that section offices of ultrasonic image in hospital network manage. The system use network technology in transferring image between ultrasonic equipments to share patient data in ultrasonic equipments. And doctors can input patient diagnostic report, saved by text file and case history, digitally managed. The system can be realized by Visual C ＋ ＋ which make windows applied. The system can be brought forward because PACS prevail with various hospitals, but PACS is expensive. In view of this status, we put forward to the analysis and management system of digital ultrasonic image, which is similar to PACS.     

Analysis and Management System of Digital Ultrasonic Image

This paper presents the analysis and management system of digital ultrasonic image. The system can manage medical ultrasonic image by collecting, saving and transferring, and realize that section offices of ultrasonic image in hospital network manage. The system use network technology in transferring image between ultrasonic equipments to share patient data in ultrasonic equipments. And doctors can input patient diagnostic report,saved by text file and case history, digitally managed. The system can be realized by Visual C which make windows applied. The system can be brought forward because PACS prevail with various hospitals,but PACS is expensive. In view of this status, we put forward to the analysis and management system of digital ultrasonic image,which is similar to PACS.     

Treatment Registration and Nuclide Decay Calculation System

Objective ：To design a software to do the complicated and multiple calculations automatically in routine internal radionuelide irradiation therapy to avoid mistakes and shorten patients waiting times. Methods：The software is designed on the Microsoft Windows XP operating system. Visual Basic 5.0 and Microsoft Access 2000 are used respectively as the programming language and database system here. The data and DBGrid controls and VB data window guide of Visual Basic were used to control access to and Access database. Results ： Not only can the radioactivity of any radionuelide be calculated, but also the administered total iodine dose of therapy for hyperthyroidism or thyroid cancer and the total administered 153Sm-EDTMP solutions for remedy of bone metastasis of malignant tumor can be ciphered out. Conclusion ：The work becomes easier, faster, more correct and interesting when the software can make the complicated and multiple calculations automatically. Patients＇ information, diagnosis and treatment can be recorded for further study.     

Research on Intelligent Positioning Bed of Body Gamma Knife Based on Sensor

This paper introduces a design to improve the radiotherapy accuracy of gamma knife. In this design, sensor is used to collect respiratory parameters and tumor displacement (caused by human respiration) model is established through optimization modeling. At the same time, data are transferred to single chip microcomputer (SCM) system by pressure sensor and then stepping motor is controlled by SCM. Finally, the intelligent positioning bed is under the control of stepping motor. As a result, the intelligent positioning bed can move reverse to respiratory law. The experimental results showed that this method can reduce the influence of respiration on tumor displacement, improving the accuracy of intelligent positioning bed with simple circuit and low cost at the same time.     

Research on Superscalar Digital Signal Processor

Under the direction of design space theory,in this paper we discuss the design of a superscalar pipelining using way of multiple issues,and the implement of a superscalar-based RISC DSP architecture. SDSP. Furthermore. in this paper we discuss the validity of instruction preferch,the hranch prediction, the depth of instruction window and other issues that can affect the performance of superscalar DSP.     

CT IMAGE MANAGEMENT SYSTEM BASED ON PC

We have developed a new CT image management system based on PersonalComputer (PC),hardware including CT to PC parallel data interface and PC (withTVGA 8900C adapter and TVGA monitor,1M DRAM).Software package consistsof communication module,image management module and image processing module.Image data can be transferred from CT to PC in 4 ways.①Use specially designed     

Development of a wearable multi-frequency impedance cardiography device

Abstract

Cardiovascular diseases as well as pulmonary oedema can be early diagnosed using vital signs and thoracic bio-impedance. By recording the electrocardiogram (ECG) and the impedance cardiogram (ICG), vital parameters are captured continuously. The aim of this study is the continuous monitoring of ECG and multi-frequency ICG by a mobile system. A mobile measuring system, based on ‘low-power’ ECG, ICG and an included radio transmission is described. Due to the high component integration, a board size of only 6.5?cm?×?5?cm could be realized. The measured data can be transmitted via Bluetooth and visualized on a portable monitor. By using energy-efficient hardware, the system can operate for up to 18?hs with a 3?V battery, continuously sending data via Bluetooth. Longer operating times can be realized by decreased transfer rates. The relative error of the impedance measurement was less than 1%. The ECG and ICG measurements allow an approximate calculation of the heart stroke volume. The ECG and the measured impedance showed a high correlation to commercial devices (r?=?0.83, p?<?0.05). In addition to commercial devices, the developed system allows a multi-frequency measurement of the thoracic impedance between 5–150?kHz.     

移动式生命支持系统远程监护与定位功能的实现

介绍了一种能够对重症患者进行快速现场急救以及运送途中急救监护的移动式生命支持系统。生命支持系统能够进行生命体征信号的无线传输和远程定位,实现了院前院内急救之间的无缝衔接。该系统机动性强,能抬、能推,还可以附载于多种运载工具上,实现了医疗救护的及时性和连续性。本文主要叙述了移动式生命支持系统的生命体征信号远程传输及定位功能的实现,并通过实验证明了远程监护与定位功能的可靠性和实用性。     

3G双处理器远程心电实时监护系统的研制

目的:详细介绍基于3G双处理器远程心电实时监护系统总体设计框架,以及各个具体功能模块的设计方法。方法:综合运用3G技术、网络技术、多媒体技术等技术,以高性能TMS302VC5402芯片为核心,专用数字信号处理器BSP15处理多媒体信息,3G通信模块HC25来实现。结果:基于3G双处理器的远程心电实时监护系统可以实时接收ECG数据并进行在线自动分析、波形显示,一旦检测到病变心电信号或可疑的心电信号时,给以预警和提示;医患可以通过远程双向音视频等技术在远离医疗设施的环境中实现急救处理。结论:本系统的实现可以帮助医生实时、全面地、无地域限制地获取病人心电信息,适合于监护具有长期带病与突然发病特点的冠心病人。3G的引入更进一步加强了信息传递的实时性与便利性。     

多参数运动心肺功能测试系统的初步应用

心肺运动试验（CPET）结合呼吸气体、十二导联心电以及功率踏车技术，实时监测在不同负荷条件下，人体心率、氧耗量和二氧化碳排出量等心肺功能参数的动态变化，从而客观、定量地评价心肺储备功能，为医师诊断、评估心肺功能疾病以及运动耐受力提供相应的临床资料。本系统结合十二导联心电图、呼吸流量、血压、二氧化碳和氧气五大生命体征监测功能，联合计算出静息状态下的静态肺功能参数，如用力肺活量（FVC）、慢肺活量（SVC）和最大通气量（MVV）等，计算出运动情况下的动态心肺功能参数，如每分钟摄氧量（VO2）、每分钟二氧化碳排出量（VCO2）以及无氧阈（AT）等。通过验证，该系统稳定可靠，参数计算准确，可准确诊断运动不耐受，为评价人体呼吸、循环、代谢等功能提供可靠的参考，具有较好的应用前景。     

基于计算机嵌入式系统的多功能麻醉机数据采集与开发

背景：传统临床手术时,一方面有麻醉机实施麻醉时所进行的各麻醉参数监控,另一方面监护装置也必须对患者的生命体征信息进行监控,因此存在线路繁杂,设备占用工作空间等问题。 目的：改善传统临床手术中麻醉机与各监护装置单独工作所引起占用空间的缺陷。 方法：由第一作者于2011-09应用计算机检索万方数据库相关文章,检索词为“麻醉工作站,麻醉监护信息管理,嵌入式系统”,并限定文章语言种类为中文。共检索到文献195篇,最终纳入符合标准的文献24篇。 结果与结论：随着临床麻醉技术的不断发展,多功能、高安全性的吸入麻醉,完善的患者麻醉监护和管理系统在现代医学中变得越来越重要。在手术过程中不仅需要监控麻醉数据参数,而且必须时刻监控患者生命体征信息,而目前传统临床手术过程中采用的麻醉机加监护辅助设备模式,存在占用空间弊端。文章介绍了以嵌入式系统为核心,开发出一种新型麻醉信息管理功能和人体信息监护功能相结合的新型多功能麻醉机。     

基于Android系统的生理数据蓝牙传输技术

目的：本文建立基于Android智能系统的生理参数移动监护系统,实现生理数据从监测模块向智能手机端传输。方法：在生理参数检测端增加蓝牙传输模块．将检测端采集到的心电等生理数据发送至Android系统智能手机端,智能手机端利用Android蓝牙API开发类,对手机端蓝牙实现打开蓝牙、搜索附近蓝牙设备等基本操作,再利用Socket连接,实现数据传输。同时手机端利用界面编程类,实现心电图界面显示,利用文件操作类实现数据存储和初步的心率计算,最终实现心电等生理参数的接收、显示、心率分析以及传输。结果：Android系统智能手机端接收蓝牙模块发送的心电数据,绘成实时心电图表,绘制在手机屏幕上,并对心电数据进行初步分析,计算得到心率值,显示在手机屏幕顶端,若心率值偏高或偏低,则发出语音报警信息。该系统演示了生理数据的传输过程,实现了蓝牙接口的数据传输控制技术。结论：本文立足于移动医疗监护系统,实现了多生理参数在Android系统中的蓝牙接口传输控制方法,该技术应用前景广泛。     

多参数心电监护仪无创血压校准及质量控制应用

多参数心电监护仪可以连续实时检测患者的生命体征,帮助医生了解病人生理参数的变化。其参数准确性就显得尤为重要。本文中采用监护仪血压参数不准实例,通过监护仪分析仪进行血压测试和校准,然后对比所测数据并分析是否符合国家计量规定的误差范围值,从而确保医用监护仪在临床中的安全使用,保障患者的安全。【关键词】监护仪;血压校准;质量控制;检测方法     

Data quality of a wearable vital signs monitor in the pre-hospital and emergency departments for enhancing prediction of needs for life-saving interventions in trauma patients

Abstract

This study was designed to investigate the quality of data in the pre-hospital and emergency departments when using a wearable vital signs monitor and examine the efficacy of a combined model of standard vital signs and respective data quality indices (DQIs) for predicting the need for life-saving interventions (LSIs) in trauma patients. It was hypothesised that prediction of needs for LSIs in trauma patients is associated with data quality. Also, a model utilizing vital signs and DQIs to predict the needs for LSIs would be able to outperform models using vital signs alone. Data from 104 pre-hospital trauma patients transported by helicopter were analysed, including means and standard deviations of continuous vital signs, related DQIs and Glasgow coma scale (GCS) scores for LSI and non-LSI patient groups. DQIs involved percentages of valid measurements and mean deviation ratios. Various multivariate logistic regression models for predicting LSI needs were also obtained and compared through receiver-operating characteristic (ROC) curves. Demographics of patients were not statistically different between LSI and non-LSI patient groups. In addition, ROC curves demonstrated better prediction of LSI needs in patients using heart rate and DQIs (area under the curve [AUC] of 0.86) than using heart rate alone (AUC of 0.73). Likewise, ROC curves demonstrated better prediction using heart rate, total GCS score and DQIs (AUC of 0.99) than using heart rate and total GCS score (AUC of 0.92). AUCs were statistically different (p?<?0.05). This study showed that data quality could be used in addition to continuous vital signs for predicting the need for LSIs in trauma patients. Importantly, trauma systems should incorporate processes to regulate data quality of physiologic data in the pre-hospital and emergency departments. By doing so, data quality could be improved and lead to better prediction of needs for LSIs in trauma patients.     

When and how do GPs record vital signs in children with acute infections? A cross-sectional study

Background

NICE recommendations and evidence from ambulatory settings promotes the use of vital signs in identifying serious infections in children. This appears to differ from usual clinical practice where GPs report measuring vital signs infrequently.

Aim

To identify frequency of vital sign documentation by GPs, in the assessment of children with acute infections in primary care.

Design and setting

Observational study in 15 general practice surgeries in Oxfordshire and Somerset, UK.

Method

A standardised proforma was used to extract consultation details including documentation of numerical vital signs, and words or phrases used by the GP in assessing vital signs, for 850 children aged 1 month to 16 years presenting with acute infection.

Results

Of the children presenting with acute infections 31.6% had one or more numerical vital signs recorded (269, 31.6%), however GP recording rate improved if free text proxies were also considered: at least one vital sign was then recorded in over half (54.1%) of children. In those with recorded numerical values for vital signs, the most frequent was temperature (210, 24.7%), followed by heart rate (62, 7.3%), respiratory rate (58, 6.8%), and capillary refill time (36, 4.2%). Words or phrases for vital signs were documented infrequently (temperature 17.6%, respiratory rate 14.6%, capillary refill time 12.5%, and heart rate 0.5%), Text relating to global assessment was documented in 313/850 (36.8%) of consultations.

Conclusion

GPs record vital signs using words and phrases as well as numerical methods, although overall documentation of vital signs is infrequent in children presenting with acute infections.     

基于Android平台的心电监护仪设计

目的：设计一种基于Android平台的心电监护系统,可以将数据发送至手机界面,并显示心电波形和心率。方法：系统基于Android平台,结合飞思卡尔单片机9SXSl28和蓝牙模块设计,完成了心电信号的获取、放大和滤波、A／D转换和蓝牙发送的功能。系统包含电源模块、心电获取硬件模块、数据采样单片机系统、蓝牙发送模块、Android手机及软件五大部分组成。结果：通过肢体导联获取心电信号,之后经单片机AD采样,通过串口转蓝牙将数据发送至手机界面,并显示心电波形和心率。结论：本文设计并实现了心电采集模块的硬件电路和软件程序,编写了Android系统手机上的简单心电监护应用程序,心电采集模块与手机之间运用蓝牙无线方式传输心电数据。系统通过肢体导联获取人体心电信号并最终实时显示在手机上。该系统轻便小巧、低功耗、操作简单。经调试,系统运行稳定,心电信号可实时显示在手机界面,心率测量准确。通过这种设计有效缓解了就医难的问题,在医疗资源相对集中的国情下,基于Android手机的健康监护有着较大前景。