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Readers' forum: experiences with a system. The implementation of a completely operational computer system in a cardio-thoracic department.

Wythenshawe Hospital is a large general district hospital with more than 1000 beds, situated approximately 9 miles south of Manchester. The Cardio-Thoracic department, housed in the new section of the hospital which was completed in 1973, is the major centre for cardiothoracic surgery in the greater Manchester area. It also receives any major accident cases which require treatment within the Intensive Therapy Unit. This paper describes a Patient Data Display System and the methods used to introduce the concept of such a system, to doctors, nurses, laboratory and paramedical staff, and the manner in which these staff were trained in the use of computer terminals. Principles underlying the need for and requirements of such a system are also discussed. Six months after hardware commissioning the system was fully operational throughout the whole department.

Computers

[Studies on a handheld computer system for perinatal care].

The present paper demonstrates a handheld computer system for use in perinatal care. The features of the system are as follows: The gestational age and fetal body weight were determined by analyzing the data from ultrasonography with the high-order regressive equation. The combined use of the linear regressive equation and Ott's equation was more useful in precisely calculating the fetal abdominal circumference. In order to decrease input error, attempts were made to minimize key-operations for data-entry. The use of the screen edition system also made it easier to correct input error. It was concluded that this system was practical and easy to handle, and would be a useful aid in clinical care.

Body Weight

Distributed computer system for capture, analysis and display of biological data.

A distributed real-time computer system has been developed to automate the collection, analysis and display of biological (pharmacological) data. It comprises a series of laboratory interface devices (CED 1401/1609) connected to a micro-VAX II via multiple IEEE-488 buses. The micro-VAX II is integrated to the main site computers using Ethernet running DECnet. The micro-VAX II system supports a multi-user, multipreparation and multitasking environment and it provides rapid transfer, storage, analysis and display of data. The system saves the pharmacologists from the manual analysis of their data, typically saving them four days of analysis per experiment and has improved both the quality of data detected and their subsequent analysis. Also, the development of a standard data capture procedure on common hardware along with the modular design of application software has almost quartered project development times.

Computer Communication Networks

[Computer system for the automatic analysis of cath-lab data. Reliability of pattern-recognition and measurements (author's transl)].

The computer-system for the on-line-analysis of hemodynamic data developed in Aachen enables the clinical user to perform the immediate on-line analysis of ECG, pressure-curves and thermo- or dye-dilution-curves in a dialog mode. The procedure of pressure analysis as well as the calculations by the computer for the individual haemodynamic parameters are described. The comparison of the medical-manual evaluation of the pressure curves on paper-registration and the computer results of the same measurement shows a very good correlation for wave-recognitions and wave-measurements for this system, integrated in the daily routine since 24 months. As well in the application of various fluid-filled catheters used in praxis as in tip-manometers it could be proved for the pressure-analysis in the different positions of the heart, that the computer-system produced reliable evaluations for all catheter materials used. The flexible conception of the computer program with its fast adaption to new problems allows its use not only in the clinical routine, but also and especially in the handling of scientific questions in the frame-work of haemodynamic analysis.

Cardiac Catheterization

Selecting and maintaining a supported office computer system.

Many costly errors can be made in selecting an in-office computer system. When selecting a system, several guidelines should be followed carefully: A professional computer consultant perhaps should be considered, depending on your level of experience and knowledge of computers. Look specifically at what you want your hardware and software to do, for this will determine the size and character of your system. Evaluate the size and potential size of your practice, as this will also determine the size and expansion capabilities of your system. Carefully evaluate your hardware and software for reputation, system support, maintenance costs, flexibility, and expandability. Carefully evaluate your cost/benefit ratio: is it worth your money to buy a computer in the first place? When evaluating the costs, don't forget the many hidden costs that may be present, in addition to the hardware/software purchase price. Computers will serve you well in the practice and business of medicine. However, in this rapidly changing technologic/informational field, the key words are knowledge and caution.

Computers

A computer system for the identification of the cerebrospinal compensatory model.

A computer system, based on IBM PC, was designed for the cerebrospinal compensatory model identification. The intracranial pressure (ICP) signal, registered during the lumbo-lumbar infusion test is analyzed by means of the spectral analysis algorithm in order to measure precisely the pulse wave amplitude. The amplitude and the mean ICP level, calculated repetetively within the period of about 8 seconds, are stored on the disk and form the basis for further model identification. Three different methods of identification were applied. They enable one to estimate the fundamental model parameters, such as: resistance to the cerebrospinal fluid resorption, pressure-volume index, baseline pressure, rate of formation of the cerebrospinal fluid. Statistical evaluation of the results of the infusion test analysis obtained by means of the system described in two groups of hydrocephalic patients (children and adults) is presented.

Adult

Implementation of a multirule, multistage quality control program in a clinical laboratory computer system.

We developed a computer subsystem that permits users to implement multirule, multistage quality control procedures. The subsystem runs as a task in the RelationaLABCOM information system and permits the collection of data from on-line instruments, as well as through manual (keyboard) entry. The choices of control rules and their combinations are at the discretion of each laboratory section, with the system automatically administering the chosen protocols for all the technologists working with the computer. Retrospective data analysis and statistics are available for review by laboratory personnel. The subsystem provides a significant improvement in the availability of real-time quality control at the bench.

Clinical Laboratory Information Systems

A comprehensive laboratory computer system working round the clock.

The special features of a laboratory computer system operated by laboratory staff around the clock are presented. The system provides registration of work, production of worksheets, on-line data acquisition and reporting results. The reasons for the special design features are discussed.

Allied Health Personnel

A comprehensive interactive on-line computer system for research and clinical practice in orthodontics.

An interactive on-line computer system for the measurement of cephalometric radiographs, and facial and plaster cast photographs is described. The details of the hardware (computer and peripherals) and software are provided. Numerical and graphical analysis and presentation of the resultant data are discussed. Many research and clinical applications of the system are outlined.

Cephalometry

AUTOGRP: an interactive computer system for the analysis of health care data.

AUTOGRP is an interactive computer system designed to facilitate rapid analysis of complex medical information. AUTOGRP allows the clinical or administrative expertise of the user to be combined with sophisticated computer techniques to permit rapid information retrieval, hypothesis testing, development of norms, and identification of deviant cases. This interaction yields results of a uniquely high statistical and medical quality. AUTOGRP has been used to aid in understanding the process of patient care management in a variety of settings in order to enhance the effectiveness of decision-making from both a medical and management point of view.

Computers

Medical office computer systems. The selection process.

This article highlights the process that a physician should undertake in selecting and implementing a business computer system for the office. Included are suggested approaches to identifying needs, establishing priorities, and communicating requirements to prospective vendors. Methods for reviewing various systems to evaluate whether they meet the practice's defined requirements are suggested.

Computer Systems

Initial experience with a small dedicated computer system in a diagnostic x-ray department.

The operation of a small computer system involved in day to day management in an X-ray department is described. The system consists of the following equipment: PDP 8/F central processor with 8K core storage, 32K magnetic disc storage, High-speed paper tape reader (300 characters/s) and punch (50 characters/s), 3 Olivetti TE318 terminals with sprocket feed, paper tape reader and punch (10 characters/s). The system stores patient data relating to name, address, age, ward, referring physician, examination(s) requested, date of request, date of examination, date of report. From this data a large volume of relevant statistics is made available to the department and to the health authority. Labels for identifying record card, film envelope and X-ray films are automatically typed. During reporting coded phrases can be used by the radiologist. Interesting films can be recorded and recalled for library or consultation purposes as can research items. At report typing stage, the report heading is automatically recalled from the computer store. Coded phrases are typed automatically as is the radiologist's name and the date of the report. A 'DAYBOOK' IS TYPED AUTOMatically at the end of each working day. Problems encountered in running the system and future developments are described.

Computers

A Macintosh computer system for collecting and analyzing rodent sexual behavior.

We present a Macintosh-based computer system for collection and analysis of rodent sexual behavior. Two computer programs are presented. The first is an entirely generalizable real time data collection program that records any keyboard or keypad inputs (e.g., user defined behavior codes) and their time of occurrence. The second is somewhat generalizable; we use it to analyze frequencies, durations, and latencies relative to a copulatory series (including mounts, intromissions, and ejaculations). To our knowledge, these are the first such programs available on the Macintosh platform.

Animals

Computer system for assisting with clinical interpretation of tumour marker data.

OBJECTIVE: To design and evaluate a computer advisory system for the treatment of gestational trophoblastic tumour. DESIGN: A comparison of clinicians' treatment decisions with those of the computer system. Two datasets were used: one to calibrate the system and one to independently evaluate it. SETTING: Department of medical oncology. PATIENTS: Computerised records of 290 patients with low risk gestational trophoblastic tumour for whom the advisory system could predict the adequacy of treatment. The calibration set comprised patients admitted during 1979-86(227) and the test set patients during 1986-89(63). MAIN OUTCOME MEASURES: The system's accuracy in predicting need to change treatment compared with clinicians' actions. The mean time faster that the system was in predicting the need to change treatment. RESULTS: On the calibration dataset the system was 94% (164/174) accurate in predicting patients whose treatment was adequate, recommending change when none occurred in only 10 (6%) patients. In patients whose treatment was changed the system recommended change earlier than clinicians in 39/53 cases (74%), with a mean time advantage of 14.9 (SE 2.02) days. On the test dataset the system had an accuracy of 91% (31/34) in predicting treatment adequacy and a false positive rate of 9% (3/34). The system recommended change earlier than clinicians in 22/29 cases (76%), with a mean time advantage of 12.5 (2.22) days. CONCLUSIONS: The computer advisory system could improve patient management by reducing the time spent receiving ineffective treatment. This has implications for both patient time and clinical costs.

Biomarkers, Tumor

A computer system for processing data from routine pulmonary function tests.

In larger pulmonary function laboratories there is a need for computerised techniques of data processing. A flexible computer system, which is used routinely, is described. The system processes data from a relatively large range of tests. Two types of output are produced--one for laboratory purposes, and one for return to the referring physician. The system adds an automatic interpretative report for each set of results. In developing the interpretative system it has been necessary to utilise a number of arbitrary definitions. The present terminology for reporting pulmonary function tests has limitations. The computer interpretation system affords the opportunity to take account of known interaction between measurements of function and different pathological states.

Computers

Applications of expert computer systems.

An expert system is a computer program which uses artificial intelligence to make logical decisions on the basis of input data. The rules the system uses to make its decisions are called heuristics which can be provided in the form of IF . . . THEN statements, or they can be learned by the system from examples. The term "expert" is used because the rules or examples come from human experts and the program is considered to have captured their expertise. Currently there are many expert systems in business and medical use but few, if any, are used in optometry. The rule-oriented nature of many ophthalmic procedures suggests a future role for these systems, but their cost-effectiveness may not yet be favorable enough to justify development of expert systems for optometric practice.

Diagnosis, Computer-Assisted

A personal computer system for testing gas exchange, heart, lungs, ventilatory pump.

This paper reports the development of a computer system for testing gas exchange and lung function in the ICU. The essence of the system is a software package that uses an IBM personal computer for data processing and analysis. Front end hardware is modular, as is software, so that portions or all of the system can be used. The system provides measurements of lung mechanics work, functional residual volume, spirometry, oxygen uptake, carbon dioxide output, lung water, blood gas interpretation, hemodynamics. Reports are provided by standard data base manager and so are easily customized.

Computers