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At least 253 records · Page 14Linked to original sources
PubMed2004

Web access to data in a mobile ECG monitoring system.

Cardiovascular diseases and, in particular, diseases related to arrhythmias are a problem that affects a significant percentage of the population, being one of the major causes of death in Europe. New advances in the fields of PDAs, mobile phones, wireless communications and vital parameter sensors have permitted the development of revolutionary medical monitoring systems, which strikingly improve the lifestyle of patients. However, not all those monitoring systems provide patients with real assistance - anywhere and at any time. We have developed a system that goes a step further than the previous approaches, being designed to capture, record and, as a distinctive feature, locally analyze the ECG signals in a PDA carried by the patient. In that sense, the system has a decision support module based on decision tree methods that can detect, with high precision, any arrhythmias that the user may be suffering. Alarms can then be activated in time to alert a medical center in order to provide the proper medical assistance. One of our aims when building the system has been to optimize limited and expensive resources like PDA memory size and wireless communication costs. Moreover, accessibility is also an important feature of the system that has been achieved by the development of web services to query the data computed in the PDA. In this way, authorized personnel (physicians and relatives) can easily obtain access to that data.

Computer Systems↗
PubMed2001

An internet-based blood pressure monitoring system for patients.

We developed a personal blood pressure monitoring system for patients with hypertension or hypotension. The system can be used to measure a patient's blood pressure at home and to transmit the data automatically to a hospital database via the Internet. The accuracy of blood pressure readings using the system was assessed by comparison with readings from a standard digital sphygmomanometer in four subjects. The measurement error for the systolic readings was 1.7-2.7% and for the diastolic readings 2.7-3.2%. The system therefore appears to be a promising means of assessing blood pressure remotely.

Adult↗
PubMedDate not supplied

The Unibed patient monitoring system: a new approach for a new technology.

The Unibed patient monitoring system represents a new approach to the design of medical instrumentation based upon recent advances in microcomputer and related large-scale integration technology. This system is intended to replace an entire range of traditional monitoring devices with a single general-purpose unit capable of recognizing the nature of the signal source and performing appropriately. All of the usual switches, knobs, dials, and meters have been replaced by a touch-sensitive character display. The hardware responsible for physiological signal analysis, information display, and user interaction is actually a set of firmware modules implemented in terms of microcomputer programs. This firmware gives the system its functional personality and transforms it from a compact process-control system into a useful medical instrument. Prototypes are now being clinically tested and evaluated at the Dijkzigt Academic Hospital, Rotterdam, Netherlands.

Computers↗
PubMed2002

[The mechanism of neurally mediated syncope assessed by an ambulatory radionuclide monitoring system and heart rate variability indices during head-up tilt].

PURPOSE: Previously, we tested the hypothesis that the great decline in left ventricular volume during head-up tilt test could trigger ventricular mechano-receptor activation, using ambulatory radionuclide monitoring system (C-VEST system). The aim of this study is to investigate the mechanism of tilt-induced syncope further, based on our previous report. METHOD: We measured the temporal changes in left ventricular volume, ejection fraction, cardiac output, and heart rate variability indices during head-up tilt test in 34 patients with syncope of an underdetermined etiology. RESULT: Twenty-two patients had a positive response (P group). Twelve patients showed a negative response (N group). Before syncope, left ventricular volume declined (P group, diastolic volume; -7.9 +/- 6.8%: systolic volume; -23.3 +/- 33.8%: N group, diastolic volume; -2.5 +/- 1.9%: systolic volume; 0.6 +/- 9.5%: p < 0.05), ejection fraction increased (P group, 3.9 +/- 2.5%; N group, -3.5 +/- 7.2%; p < 0.005), and high frequency spectra increased (P group, 12.0 +/- 20.3%; N group, 3.1 +/- 9.7%; p < 0.05), more extremely in the P group than in the N group. The value of the high frequency spectra before the head-up tilt test was significantly higher in the P group than in the N group (P group, 5.8 +/- 0.9 ms; N group, 5.0 +/- 1.1 ms; p < 0.05). CONCLUSIONS: (1) The precise evaluation of left ventricular volume by ambulatory radionuclide monitoring system combined with a heart rate variability analysis is considered to be useful for clarifying the pathophysiology of neurally mediated syncope. (2) Patients with neurally mediated syncope have higher baseline parasympathetic tone than normal population.

Adult↗
PubMed1999

A monitoring system for detecting aberrations in public health surveillance reports.

Routine analysis of public health surveillance data to detect departures from historical patterns of disease frequency is required to enable timely public health responses to decrease unnecessary morbidity and mortality. We describe a monitoring system incorporating statistical 'flags' identifying unusually large increases (or decreases) in disease reports compared to the number of cases expected. The two-stage monitoring system consists of univariate Box-Jenkins models and subsequent tracking signals from several statistical process control charts. The analyses are illustrated on 1980-1995 national notifiable disease data reported weekly to the Centers for Disease Control and Prevention (CDC) by state health departments and published in CDC's Morbidity and Mortality Weekly Report. Published in 1999 by John Wiley & Sons, Ltd. This article is a U.S. Government work and is in the public domain in the United States.

Centers for Disease Control and Prevention, U.S.↗
PubMed1998

A simple method for the comparison of commercially available ATP hygiene-monitoring systems.

The purpose of this study was to evaluate a methodology which could easily be used in any test laboratory in a uniform and consistent way for determining the sensitivity and reproducibility of results obtained with three ATP hygiene-monitoring systems. The test protocol discussed here allows such comparison to be made, thereby establishing a method of benchmarking both new systems and developments of existing systems. The sensitivity of the LUMINOMETER K, PocketSwab (Charm Sciences) was found to be between 0.4 and 4.0 nmol of ATP with poor reproducibility at the 40.0 nmol level (CV, 35%). The sensitivity of the IDEXX LIGHTING system and the Biotrace UNILITE Xcel were both between 0.04 and 0.4 nmol with coefficients of variation (CVs) of between 9% at 0.04 nmol and 10% at 0.4 nmol for the IDEXX system and 17% at 0.04 nmol and 21% at 0.4 nmol for the Biotrace system. The three systems were tested with a range of dilutions of different food residues: orange juice, raw milk, and ground beef slurry. All three test systems allowed detection of orange juice and raw milk at dilutions of 1:1,000, although the CV of results from the Charm system (54 and 74% respectively) was poor at this dilution for both residues. The sensitivity of the test systems was poorer for ground beef slurry than it was for orange juice and raw milk. Both the Biotrace and IDEXX systems were able to detect a 1:100 dilution of beef slurry (with CVs of 17 and 10% respectively), whilst at this dilution results from the Charm system had a CV of 55%. It was possible by using the method described in this paper to rank in order of sensitivity and reproducibility the three single-shot ATP hygiene-monitoring systems investigated, with the IDEXX LIGHTNING being the best, followed by the Biotrace UNILITE Xcel, and then the charm LUMINOMETER K, PocketSwab.

Adenosine Triphosphate↗
PubMed1980

BMON2--a distributed monitor system for biological image processing.

This paper presents an example of a distributed monitor system BMON2, which was developed and is in daily use in a biological image processing environment. Some useful aspects of such a system are discussed, particularly those which make for easier biologist-user interaction and system extensibility. The principles of extension of the distributed monitor to a time-shared computer system is outlined.

Computers↗
PubMed2005

[A monitoring system for work-related accidents in Piracicaba, São Paulo, Brazil].

The authors report on the development of a work accident monitoring system in Piracicaba, São Paulo State, Brazil, with the following characteristics: information feeding the system is obtained in real time directly from accident treatment centers; the system has universal monitoring, covering all work-related accidents in Piracicaba, regardless of the nature of the worker's employment conditions, place of work, or place of residence; health surveillance and promotion of health initiatives are triggered by identification of sentinel events; spatial distribution analysis of work-related accidents is a basic tool in designing accident awareness strategies and accident prevention policies. The system was implemented in November 2003 and by October 2004 had identified 5,320 work-related accidents, or a 3.8% annual proportional incidence of work-related accidents in the municipal area. We illustrate spatial analysis of registered work-related accidents and present a detailed investigation of one example of a serious accident.

Accidents, Occupational↗
PubMedDate not supplied

Problems in the development of a computerized ward monitoring system for a paediatric intensive care unit.

A computerised ward monitoring system based on Archimedes PC's at each bedside is under development for the PICU at Killingbeck Hospital in Leeds. This work was initiated with a view to reducing the amount of paperwork in the unit. The present paper charts have been broken down into sections for the purpose of entry into the computer. The completed charts may be viewed in tabular form. There are several alternative displays. The default display mode illustrates the patients principal cardiovascular variables over the previous six hours. Alternative graphical displays include 12 hour trend curves for the cardiovascular variables, a screen with one hour trend graphs and panels illustrating the latest values of other patient variables, and graphical 12 hour reviews for clear fluid balance, blood volume balance and respiratory variables. The program also serves as a vehicle for testing an alarm generating system and a cardiovascular status index in the paediatric environment. A separate program has been developed which allows the retrospective construction of data bases by using some or all of the data from one or more of the charts for a series of patients. Finally the difficulties encountered in preliminary trials of the system are discussed. At the present time the program is being run at a central station while attempts are being made to surmount these difficulties.

Algorithms↗
PubMed2003

Rationales, obstacles and strategies for local outcome monitoring systems in substance abuse treatment settings.

The need for outcome monitoring systems (OMS) in substance abuse treatment is now such a pervasive position that it has achieved 'motherhood' stature. Yet, for a variety of reasons, implementation of systematic, ongoing monitoring continues to lag in most settings. The position taken in this article is that a local approach to monitoring is a viable alternative to large scale monitoring programs when such programs are unavailable. Moreover, local OMS can supplement these more generic programs by providing data that are more in tune with the orientation and program development of a specific setting. This article argues that local OMS can be developed with a reorganization of customary documentation procedures, a modest investment of personnel and specialized technical resources, a shorter-term view to outcome, and a commitment to evidence-based treatment.

Cost-Benefit Analysis↗
PubMedDate not supplied

Clinical evaluation of a new computerized arrhythmia monitoring system.

A study has been made of the accuracy of a computerized system of arrhythmia monitoring in the coronary-care unit of the Palo Alto Veterans Administration Hospital. The system provides beat-to-beat analysis of cardiac rhythm and QRS morphology and stores information for display of incidence of abnormalities and trend curves. The variables monitored by the system include: (1) heart rate, (2) early beats, (3) late beats, (4) abnormal QRS waveforms, and combinations of 2, 3, and 4. Accuracy analysis was performed using a standard ECG trace with a simultaneous record of computer classification of each QRS complex on a dual-channel recorder. Thirty-four patients with various cardiac arrhythmias were studied and 188,000 QRS complexes were evaluated. The number of true abnormal beats (abnormal in timing or waveform) recorded by the ECG was 12,194 out of 188,000 or 6.5 per cent. Computer classification accuracy was as follows: false positives (computer diagnosis abnormal but ECG diagnosis normal), 0.10 per cent (191 complexes) of all complexes and 1.56 per cent of true positives. False negatives (computer diagnosis normal but ECG diagnosis abnormal), 0.70 per cent (84 complexes) of abnormal beats. Computer monitoring and analysis of seven variables in cardiac rhythm and QRS waveform abnormalities can be performed with a high degree of accuracy using a compact computer system suitable for intensive-care units.

Arrhythmias, Cardiac↗
PubMed2001

The repeatability of left ventricular volume assessment by a new ambulatory radionuclide monitoring system during head-up tilt.

The precise measurement of changes in left ventricular volume is important to elucidate the mechanisms of neurally mediated syncope. This study was conducted to determine whether or not a brand-new ambulatory radionuclide monitoring system (C-VEST system) can be clinically used to easily and precisely measure left ventricular volume and function in tilt testing. To assess the repeatability of the C-VEST system, 12 healthy volunteers (mean age 24+/-4 years old) underwent 20 minute head-up tilt testing and we measured the temporal changes in left ventricular volume and ejection fraction twice a day (first and second studies). To investigate the changes in the C-VEST measurements and the detector position in the first and second studies, tilt testing was performed with an 80-degree passive tilt, which is the same as the standard procedure used in diagnosing neurally mediated syncope. The coefficient of repeatability for both the C-VEST and detector position was well within the clinical range (coefficient of repeatability in left ventricular volume ranged from 1.7 to 2.8; coefficient of repeatability in the detector position ranged from 2.3 to 3.1). Precise evaluation of the left ventricular volume can be achieved by an ambulatory radionuclide monitoring system in tilt testing.

Adult↗
PubMed1987

Continuous EKG monitoring systems.

This article discusses the employment of continuous electrocardiographic (EKG) monitoring as a tool utilized by the nurse to augment his/her expert assessment skills. The components of the EKG monitoring system and their specific functions are addressed with special emphasis on the importance of proper lead attachment, alarm settings, and documentation of the rhythm strips. Specific techniques for preventing and/or trouble-shooting monitoring problems are also presented.

Electrocardiography↗
PubMed1980

A microprocessor-based animal monitoring system.

The construction of a system for continuous, automatic monitoring of the activity of many animals is described. The system uses a microprocessor to control sampling of each animal box, accumulate activity scores, keep time, and control printout. For the detection units, infrared light-emitting diodes and infrared-sensitive phototransistors were used. With limited technical advice the system can be constructed by a novice of electronics. A system to monitor 40 animals would take approximately 3 wk to build and would cost about $700.

Animals↗
PubMed1991

Expenditures for veterinary services and other costs of disease and disease prevention in 57 California beef herds in the National Animal Health Monitoring System (1988-1989).

Data on costs associated with episodes of disease and disease prevention, including expenditures for veterinary services, were collected from 57 California beef cow-calf herds during 1988-1989 as part of the National Animal Health Monitoring System. Mean cost associated with episodes of disease was $33.90/cow-year, with $0.78 and $1.37/cow-year being spent for veterinary services and drugs, respectively. The highest cost for veterinary services related to episodes of disease were for dystocia, lameness, and ocular carcinoma. For disease prevention, mean expenditures for veterinary services were $1.67/cow-year, nearly all of which was spent on prevention of reproductive tract conditions. Preventive expenditures for veterinary services related to female infertility (pregnancy examination), vaccination against brucellosis and male infertility (breeding soundness examination) were $0.72, $0.39, and $0.22/cow-year, respectively. Many costs associated with episodes of disease and disease prevention were similar to those reported from Colorado National Animal Health Monitoring System beef herds.

Agriculture↗
PubMed1997

[The development of ECG trans-telephone popular monitoring system].

In this essay a new kind of ECG telemetry and monitoring system based on public telephone network is presented, which is able to transfer four channels of ECG of two patients to monitoring center sited at hospital synchronizingly. At the same time doctors may make diagnosis and give instruction for treatment. The system has the functions of real time sample, reviewing, freezing, store, windows, and printing, etc.

Electrocardiography↗
PubMed2005

A wearable, mobile phone-based respiration monitoring system for sleep apnea syndrome detection.

A new wearable respiration monitoring system has been developed for non-invasive detection of sleep apnea syndrome. The system, which is attached to a shirt, consists of a piezoelectric sensor, a low-power 8-bit single chip microcontroller, EEPROM and a 2.4 GHz low-power transmitting mobile phone (PHS). The piezoelectric sensor, whose electrical polarization voltage is produced by body movements, is installed inside the shirt and closely contacts the patient's chest. The low frequency components of body movements recorded by the sensor are mainly generated by respiration. The microcontroller sequentially stores the movement signal to the EEPROM for 5 minutes and detects, by time-frequency analysis, whether the patient has breathed during that time. When the patient is apneic for 10 sseconds, the microcontroller sends the recorded respiration waveform during and one minute before and after the apnea directly to the hospital server computer via the mobile phone. The server computer then creates apnea "filings" automatically for every patient. The system can be used at home and be self-applied by patients. Moreover, the system does not require any extra equipment such as a personal computer, PDA, or Internet connection.

Cell Phone↗
PubMed2006

A new infusion pathway monitoring system utilizing electrostatic induced potential.

We have developed a new infusion pathway monitoring system employing linear integrated circuits and a low-power 8-bit single chip microcomputer. The system is available for hospital and home use and it constantly monitors the intactness of the pathway. The sensor is an electro-conductive polymer electrode wrapped around the infusion polyvinyl chloride infusion tube. This records an AC (alternating current) voltage induced on the patient's body by electrostatic coupling from the normal 100 volt, 60 Hz AC power line wiring field in the patient's room. If the injection needle or infusion tube becomes detached, then the system detects changes in the induced AC voltage and alerts the nursing station, via the nurse call system or PHS (personal handy phone System).

Amplifiers, Electronic↗