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Biomedical subjects

R Haux

Publications and source records attributed to R Haux.

At least 91 records · Page 5Linked to original sources
PubMed1995

A three-level graph-based model for the management of hospital information systems.

Information processing in hospitals, especially in university hospitals, is currently faced with two major issues: low-cost hardware and progress in networking technology leads to a further decentralization of computing capacity, due to the increasing need for information processing in hospitals and due to economic restrictions, it is necessary to use commercial software products. This leads to heterogeneous hospital information systems using a variety of software and hardware products, and to a stronger demand for integrating these products and, in general, for a dedicated methodology for the management of hospital information systems to support patient care and medical research. We present a three-level graph-based model (3LGM) to support the systematic management of hospital information systems. 3LGM can serve as a basis for assessing the quality of information processing in hospitals. 3LGM distinguishes between a procedural level for describing the information procedures (and their information interchange) of a hospital information system and thus its functionality, a logical too level, focusing on application systems and communication links, and a physical tool level with physical subsystems (e.g., computer systems) and data transmission. The examples that are presented have been taken from the Heidelberg University Hospital Information System.

Computer Graphics↗
PubMed1995

Digital optical archiving of medical records in hospital information systems: results of a pilot (feasibility) study.

The paper-based medical record is a "principal repository for information" [1] and supports health care professionals in patient care, quality assessment, and often medical research. University hospitals often require expensive space for a long-time storage of medical records. The costs for operating conventional archives are high and will increase in future. In spite of these efforts, conventional archiving does not satisfy the medical needs to make available medical records for health care professionals in a systematic and timely manner.

Hospital Information Systems↗
PubMed1995

An integrated approach for mobile information processing in hospitals.

Computer-based mobile information processing in hospitals is at a turning point of becoming a substantial and integral part of hospital information systems. Its necessity and potential require a comprehensive systematic approach to support the needs of health care professionals and thus to contribute to high quality patient care and medical research. From the authors' point of view, standardized digital documents could become an appropriate basis for distributed mobile information processing in hospitals. An architecture for the integrated co-operative use of conventional, stationary, and mobile information tools is a major research topic at Heidelberg University. The objective of this paper is to present a departmental prototype design to establish mobile information processing as an integral part of hospital information systems through the use of standardized digital documents.

Computer Communication Networks↗
PubMed1995

Digital optical archiving of medical records in hospital information systems--a practical approach towards the computer-based patient record?

The large number of inpatients and outpatients in university hospitals leads to high costs of medical documentation and to an increasing number of medical documents. Due to legal regulations, these medical records have to be stored for 30 years. This implies spatial, organizational, and economical problems. At present, conventional archiving in hospitals often does not satisfy the need to make medical records available for health-care professionals in a systematic and timely manner. From 1989 to 1993 a pilot study on "digital optical archiving of medical records" was carried out at Heidelberg University Hospital. The study has shown the feasibility of digital optical archiving in hospital s if done under certain conditions. In 1995, Heidelberg University Hospital adopted a procedure for "digital optical archiving of medical records". The digital optical archive will first be filled with the medical records of the department of neurosurgery and the endoscopic and echographic images and reports of the department of internal medicine. It is to be expected that this procedure will gradually lead to an integrated functionality on health-care professional workstations, to a hospital-wide use of an electronic patient record, and to media-independent document management systems. The paper focuses on the potentials of digital optical archiving as an integral part of hospital information systems, and on the requirements for the systematic managements of hospital information systems with respect to digital optical archives.

Archives↗
PubMed1994

Health and medical informatics education.

Health and medical informatics education has meanwhile gained considerable importance for medicine and for health care. Specialized programs in health/medical informatics have therefore been established within the last decades. This special issue of Methods of Information in Medicine contains papers on health and medical informatics education. It is mainly based on selected papers from the 5th Working Conference on Health/Medical Informatics Education of the International Medical Informatics Association (IMIA), which was held in September 1992 at the University of Heidelberg/Technical School Heilbronn, Germany, as part of the 20 years' celebration of medical informatics education at Heidelberg/Heilbronn. Some papers were presented on the occasion of the 10th anniversary of the health information science program of the School of Health Information Science at the University of Victoria, British Columbia, Canada. Within this issue, programs in health/medical informatics are presented and analyzed: the medical informatics program at the University of Utah, the medical informatics program of the University of Heidelberg/School of Technology Heilbronn, the health information science program at the University of Victoria, the health informatics program at the University of Minnesota, the health informatics management program at the University of Manchester, and the health information management program at the University of Alabama. They all have in common that they are dedicated curricula in health/medical informatics which are university-based, leading to an academic degree in this field. In addition, views and recommendations for health/medical informatics education are presented. Finally, the question is discussed, whether health and medical informatics can be regarded as a separate discipline with the necessity for specialized curricula in this field.(ABSTRACT TRUNCATED AT 250 WORDS)

Medical Informatics↗
PubMed1994

Twenty years medical informatics education at Heidelberg/Heilbronn: evolution of a specialized curriculum for medical informatics.

The medical informatics curriculum at University of Heidelberg/School of Technology Heilbronn started in 1972 as a specialized university curriculum. In this paper, we report on 20 years of experience and the evolution of this educational approach with respect to structure and content of the curriculum. We emphasize that this evolution parallels the development of medical informatics to a medical discipline in its own right, with distinct application domains and specific methodological approaches. Based on our experience and on recommendations from the national and international community, we describe and discuss the features of the curriculum.

Curriculum↗
PubMed1994

Medical informatics Heidelberg/Heilbronn: graduates' experiences and job situation. An inquiry among graduates having completed the curriculum of medical informatics at the University of Heidelberg/School of Technology Heilbronn.

On the occasion of the 20th anniversary of the curriculum of medical informatics at the University of Heidelberg/School of Technology Heilbronn, a written and anonymous inquiry was carried out in March 1992 among the entirety of graduates from the curriculum. The aim of the inquiry was to obtain from the graduates of the curriculum information about their current places of employment, their fields of work, the state of continuing education as well as about their professional position. It was, in addition, intended to obtain from the graduates' point of view an assessment of the education received during their studies as well as an assessment of the job situation. A questionnaire was sent to all persons having completed their studies by that time (n = 567, as of 1.1.1992). 62.2% of the forms were returned duly filled in; 92.2% of the graduates are employed. 44.5% out of them are working within the field of medical informatics, 53.0% are working outside medical informatics but within the sector of informatics and 2.2% in other fields; 0.3% were without indication. As far as places of employment are concerned, enterprises concentrating on hardware and software development rank first, followed by hospitals and medical institutions affiliated to universities. As far as fields of work are concerned, information systems within the health care sector (especially hospital information systems) as well as medical documentation predominate in the group of those employed within medical informatics, whereas among those not working within medical informatics software engineering as well as database systems and information systems prevail.(ABSTRACT TRUNCATED AT 250 WORDS)

Curriculum↗
PubMed1994

Can health/medical informatics be regarded as a separate discipline?

The participants of the panel on education and training in Medical Informatics, concurred that health/medical informatics is today thriving as a separate discipline, despite inevitable uncertainties regarding the future. Conferees discussed the distinctions between physician-built systems and those designed by medical informaticians, focusing on methodology as critical to medical informatics.

Medical Informatics↗
PubMed1992

Recommendations of the German Association for Medical Informatics, Biometry and Epidemiology for education and training in medical informatics.

In the fields of health care and medicine there is an immense demand for a systematic application of methods of information processing and for the use of computers. Obviously, to that end well-trained scientists and qualified personnel must be available. With the present recommendations on education and training in medical informatics the German Association for Medical Informatics, Biometry and Epidemiology (GMDS) proposes structure and contents of medical informatics curricula and courses. The recommendations describe a 2-dimensional educational framework with different education levels in one dimension and various types of educational needs and orientation in the other one. The recommendations comprise at the university level education as well specialized curricula covering the total spectrum of medical informatics as well as informatics curricula with medical informatics as integrated applied subject or subsidiary subject, respectively. Besides these informatics-oriented approaches medical-oriented programs of education in medical informatics are recommended, e.g., post-graduate education in medical informatics for physicians based on foundations in medical informatics as part of their initial training in medicine. At the level of polytechnical schools curricula of medical documentation and informatics and at the level of professional schools training in medical documentation are recommended. This report is a translation of its German original. Although considered by the GMDS as recommendations for the Federal Republic of Germany, the text may also contribute to the development of an international, especially European framework of training in medical informatics.

Germany↗
PubMed1992

Data modeling for immunological and clinical data of leukemia and myasthenia patients.

In this study it was investigated whether and to what extent semantic data models and their methods for data modeling are useful for adequate representation and integration of immunological and clinical data. To that end the special research program in leukemia research and immunogenetics (SFB 120) of the University of Tübingen was taken as an example. Based on the semantic data model RM/T we propose the design of a database system, report on its realization, and discuss this approach. Using a semantic data model, the quality of data increased considerably. This means, for instance, that the integration of the molecular-biological knowledge allows a better control of the person-related results. Hence, the decisions based of these data may have greater validity and the treatment on leukemia patients can be improved. Furthermore, the elucidation of immune mechanisms concerning auto-immune diseases could be improved.

Autoimmune Diseases↗
PubMed1991

Ergotamine, flunarizine and sumatriptan do not change cerebral blood flow velocity in normal subjects and migraneurs.

Changes in the diameter of extracranial and intracranial arteries resulting in changes in cerebral blood flow have previously been assumed to be the most important pathophysiological factor in migraine. To test this hypothesis 20 normal subjects, and three groups of patients (n = 29) with migraine were investigated by means of transcranial Doppler sonography. Blood flow velocities in the middle cerebral (MCA) and in basilar (BA) arteries were measured. Data from patients were obtained in the interval between migraine attacks, during migraine attacks and following treatment with either ergotamine (0.5 mg i.m.; n = 10); flunarizine, a calcium overload blocker (20 mg i.v.; n = 13); or a 5-HT1-like agonist (sumatriptan, 4 mg s.c.; n = 6). Ergotamine and sumatriptan are constrictors of cerebral arteries in animal experiments. The arithmetic mean of flow velocity in the BA was reduced in normal subjects (45 cm/s) as compared with patients with migraine measured in between attacks (53 cm/s). Mean flow velocity in MCA was not different in normals (72.5 cm/s) as compared with migraineurs (75 cm/s). Neither ergotamine nor the 5-HT1 agonist and flunarizine resulted in a significant change in blood flow velocity in MCA and BA. This was true irrespective of whether the drugs were given in the headache-free period, during a migraine attack or during the withdrawal phase of drug-induced headache. Ergotamine was effective in improving headache during migraine attacks and sumatriptan attenuated headache during drug withdrawal from chronic analgesic intake. These results indicate that the action of ergotamine and the 5-HT1-receptor agonist is probably not mediated by their vasoconstrictor action on cerebral arteries.

Adult↗
PubMed1989

[Is early defibrillation in the emergency-first aid call system useful?].

In a model study, 115 firemen and ambulance emergency personnel were trained in a 12-hour course to use conventional defibrillators prior to the arrival of an emergency care physician for treating patients with ventricular fibrillation. Subsequently, 178 firemen were trained in a 6-hour course to use semi-automatic defibrillators. A total of 252 resuscitations were evaluated with the help of tape recordings. The survival rate of 124 patients with ventricular fibrillation was statistically significantly higher after defibrillation by ambulance personnel if the emergency physician arrived in less than 14 minutes after the emergency call. A group of 109 patients who underwent only cardiopulmonary resuscitation until the arrival of the emergency physician served as a control.

Aged↗
PubMed1989

Knowledge-based decision support for diagnosis and therapy: on the multiple usability of patient data.

Expert systems in medicine are frequently restricted to assisting the physician to derive a patient-specific diagnosis and therapy proposal. In many cases, however, there is a clinical need to use these patient data for other purposes as well. The intention of this paper is to show how and to what extent patient data in expert systems can additionally be used to create clinical registries and for statistical data analysis. At first, the pitfalls of goal-oriented mechanisms for the multiple usability of data are shown by means of an example. Then a data acquisition and inference mechanism is proposed, which includes a procedure for controlling selection bias, the so-called knowledge-based attribute selection. The functional view and the architectural view of expert systems suitable for the multiple usability of patient data is outlined in general and then by means of an application example. Finally, the ideas presented are discussed and compared with related approaches.

Decision Support Techniques↗
PubMed1989

On medical informatics.

This paper summarizes the author's point of view of defining medical informatics, to stimulate further discussions on how this "newly emerging discipline" should further proceed. We realize that the term "informatics" is related rather to the term "information science" than to "computer science". Accordingly, medical informatics deals with the systematic processing of information in medicine. Many information systems in medicine are interrelated and can hardly be regarded as independent systems. As a result, medicine becomes gradually more an "empirical science of extreme complexity". Because of its complexity and wide range of applications, medical informatics should be considered as a separate discipline, its aim being to contribute to the systematic processing of information in medicine. The contribution of medical informatics should be a better understanding of the human being and means for the provision of high quality patient care.

Electronic Data Processing↗
PubMed1979

[Plasma renin activity, plasma volume extracellular fluid volume and cardiac output in essential hypertension (author's transl)].

The plasma renin activity (PRA), the plasma volume (PV), the extracellular fluid volume (ECV), the cardiac output and the peripheral vascular resistance (TPR) were determined in 51 patients (14 women, 37 men) with essential hypertension of varying severity. The following findings were achieved: 1. In 9 of the 51 patients with essential hypertension (approximately 18%) a low and non-sensitive PRA was detected. 2. PV, ECV, cardiac output and the calculated peripheral vascular resistance of the essential hypertensive patients with low and non-sensitive PRA did not differ significantly from those of the essential hypertensive patients with normal or elevated PRA. 3. The hypertensive patients with low and nonsensitive PRA had the highest average arterial pressure. From these findings it can be concluded that the essential hypertensive patients with low PRA are not an homogeneous group. It is assumed that in a subgroup the elevated blood pressure may be the cause of the renin suppression.

Adult↗