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Biomedical subjects

H Seibold

Publications and source records attributed to H Seibold.

At least 19 recordsLinked to original sources
PubMed2003

Soarian--workflow management applied for health care.

OBJECTIVES: To describe and comment on functionality and architecture of the software product Soarian developed by Siemens, to identify key differentiators to related products, and to comment on predecessor systems and beta versions. This has been done in the framework of a conference on health information systems of the IMIA. METHODS: Analyzing existing literature. Site visit of a predecessor system at Haukeland Sykehus, Bergen. Pilot of a beta version at the Erlangen University Medical Center, elaborating on major characteristics in discussion rounds. RESULTS: Soarian is a functional comprehensive, clinically oriented software product to support health care processes and to be used for health care professional workstations. It is a software product, designed and written completely new. Three major key differentiators were identified in comparison to related software products: Soarian's workflow engine, its embedded analytics, and its 'smart' user interface. The targeted reduced installation time is stated to be 12 months or less. CONCLUSIONS: Soarian has good chances to become one of the major software products for health care professional workstations in the international market to support patient-centered, shared care. Its global design may help to better support and maintain national or language specific versions. The first installations of Soarian will be critical, as they will show how the system will be accepted. To use such software products efficiently, organizational aspects within hospitals as well as between health care institutions have to be considered, e.g. strategic IT planning.

Computer Systems↗
PubMed1999

Rel transcription factors contribute to elevated urokinase expression in human ovarian carcinoma cells.

Elevated levels of the urokinase-type plasminogen activator (uPA) in tumor cells are conductive to tumor cell spread and metastasis. In a previous study we observed that suppression of RelA dramatically reduced endogenous uPA synthesis in the human ovarian cancer cell line OV-MZ-6. Because the uPA promoter contains three potential Rel-like protein binding motifs (RRBE, 5'-NF-kappaB, and 3'-NF-kappaB) we conducted the first thorough systematic uPA promoter analysis to examine the direct impact of Rel proteins on uPA gene transcription. Disruption of RRBE resulted in a approximately 40% decrease in uPA promoter activity, mutation of the 5'-NF-kappaB motif led to an additional 20% decrease. The 3'-NF-kappaB motif was not active. Overexpression of RelA significantly enhanced uPA promoter activity, whereas IkappaB-alpha overexpression reduced uPA promoter activity by 40%. These data were supported by the finding that endogenous uPA was also increased sixfold by overexpression of RelA and decreased by 30% upon overexpression of IkappaB-alpha. Transfection of OV-MZ-6 cells with antisense deoxynucleotides directed to RelA expression reduced uPA promoter activity by at least 40%. Our data clearly suggest that by binding to uPA promoter elements, Rel transcripton factors contribute directly to elevated uPA gene expression in human ovarian cancer cells, thereby promoting the multiple functions of uPA during tumor growth and metastasis.

Binding Sites↗
PubMed1998

The Erlangen university hospital communication hub--proprietary and standardised communication.

The University of Erlangen-Nuremberg contains 22 hospitals and 11 autonomous medical departments which are spread out over a large area in the city of Erlangen. The necessary connections of these units and their computer based subsystems to each other and to the medical computer centre via fibre optics cables is complete. The internal cabling of the individual units is largely completed. Based on this network the Erlangen communication hub allows medical subsystems of the Erlangen university hospitals to exchange data by two completely different methods. Since 1995 a communication data base, which is implemented using the relational data base system ADABAS D, contains data from the most important hospital systems. This data can be accessed by other medical systems. Thus the communication data base allows subsystems which do not have a standardised interface to implement proprietary system interconnections via access based on SQL. The capabilities of this interconnection are dependent on both the implementation and the data which is made available by the communication data base. This contains mainly basic patient data and the results of tests performed by various laboratory systems. In addition to this proprietary communication system we have since the end of 1996 a communication server which can also handle standardised message formats such as HL7, EDIFACT, DICOM3. Future subsystems which possess standard interfaces will be connected via this server. The connection of the patient management system IS-H and the central laboratory system to the database has been proceeding since the beginning of 1997.

Computer Communication Networks↗
PubMed1995

RDA: a standard for client server communication in a hospital information system.

The University of Erlangen-Nürnberg contains a large medical faculty with many hospitals, laboratories, and other departments distributed in the town of Erlangen, and it is necessary to exchange medical data between them. For example the basic patient data which are held on central computers, must be distributed to various stations and departments. In addition medical reports which are prepared on or generated by computers in central departments must be transmitted to various points in the hospitals [1]. When the network, based on ethernet cabling within the hospitals and a glass fiber backbone, has been completed, the Erlangen hospital communication system will support an electronic exchange of medical information. Two separate communication methods are used: data exchange via electronic mail according to the international standard X.400 and remote access to central databases using the software product NET-WORK.

Computer Communication Networks↗
PubMed1995

Dissemination of patient data in the Erlangen Hospital communication and information system.

It is necessary to exchange information between the various institutions of the medical faculty of the University of Erlangen-Nurnberg. For example, basic patient data, which is collected in a central computer, must be distributed to various stations and laboratories. Also medical findings, which are already captured in computers in central laboratories, must be transmitted to various parts of the university hospitals. After the data network, consisting of a glass fiber backbone linking the buildings and cabling in the individual departments, had been implemented, it became possible to provide an electronic exchange of medical information.

Computer Communication Networks↗
PubMed1993

Neutrophilic migration through capillarylike micropores: influence of pulmonary passage.

We report the effect of pulmonary passage on random migration and chemokinesis of neutrophils through capillarylike pores under the in vitro condition of Boyden's test. Neutrophils were isolated either from the left ventricle or from the pulmonary artery of patients who underwent coronary angiography due to suspected angina pectoris or valvular heart disease. In all 14 cases left ventricle neutrophils showed significantly enhanced chemotactic-activated migration compared with pulmonary artery neutrophils. Pulmonary passage also influenced the random migration of neutrophils, except for those derived from five patients suffering from pulmonary hypertension. Our findings might indicate that accumulation of neutrophils in the capillaries of the normal lung is counteracted by a change in neutrophilic migration behavior during pulmonary passage, thus avoiding increased neutrophilic sequestration in pulmonary microcirculation as observed in adult respiratory distress syndrome.

Adolescent↗
PubMed1991

Effects of atenolol, slow-release nifedipine, and their combination on respiratory gas exchange and exercise tolerance in stable effort angina.

The effects of atenolol, nifedipine, and their combination on gas exchange and exercise tolerance were studied in 27 patients with effort angina and normal global ventricular function in an open-label and randomized cross-over trial. Symptom-limited semi-supine exercise tests using a ramp protocol (20 W/min) with simultaneous breath-by-breath analysis of gas exchange were carried out after a 4-day wash-out period and after consecutive 2-week treatment periods with atenolol (50 mg b.i.d.), slow-release nifedipine (20 mg b.i.d.), and their combination (b.i.d.). Exercise tolerance was not significantly higher with atenolol than with nifedipine [118(24) vs 113(23) W]. Combination therapy [120(23) W] was more effective than monotherapy with nifedipine (p less than 0.05) but produced no further increase in exercise tolerance over atenolol monotherapy. Maximum oxygen uptake was not significantly different among the treatments. In the range of light to moderate exercise, the slope of the VO2-workload regression line expressed as ml.min-1.W-1 was lower with atenolol than with nifedipine [8.64(1.59) vs 10.28(1.74), p less than 0.005] and intermediate with combination therapy [9.99(1.83)]. The intercept on the VO2 axis was higher with atenolol than with nifedipine [366(111) vs 299(113) ml.min-1, p less than 0.05]. A similar pattern of results was seen when the drug effects on the slope of the VCO2-workload relation were analyzed. VE was higher with nifedipine than with atenolol at all points of the regression analysis [greater than 30 W].(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1990

An unusual presentation of staphylococcal pericarditis.

An atypical presentation of purulent pericarditis caused by Staphylococcus aureus is described. A bacterial etiology was initially not taken into consideration because the clinical course was torpid and afebrile. Therefore, the appropriate treatment was delayed. The patient recovered after percutaneous pericardial drainage of his purulent pericardial effusion and antimicrobial therapy. The importance of a high index of suspicion of a bacterial cause in patients with pericardial effusion of unexplained etiology is emphasized.

Bacteriuria↗
PubMed1990

"Physiological osteoporosis" and "osteoblast insufficiency" in old age. Comparative radiological-morphometric and statistical studies on the spongy bone of lumbar and cervical vertebral bodies.

To investigate the expectation of general insufficiency of osteoblasts with increasing age, we studied autotopsy material from 105 deceased persons of both sexes who had died between 16 and 91 years and in whom clinically manifest diseases of the bone had been excluded. Quantitative morphometric examination of the structure of the spongy bone of the 3rd-5th lumbar vertebral bodies (LVBs) and of the 5th-7th cervical vertebral bodies (CVBs) was carried out in frontal and sagittal planes, the parameters analysed being volumetric density (Vv), surface density (Sv) and specific surface area (S/V), and the results were subjected to statistical evaluation. The results showed that in the three LVBs, Vv, Sv and S/V behave in a similar manner, Vv and Sv decreasing after the age of 50 years by more than one-third while S/V remains constant throughout life. The three lower CVBs had higher values than the LVBs for all three structural parameters. In the 7th CVB somewhat lower Vv and Sv values and higher S/V values were found than in the 5th and 6th. The age-related changes, by contrast, were very small. This differing behavior of the spongy bone in the two regions of the spinal column is an expression of the different characteristic loading forces in each regions: LVB loading is predominantly static, CVB loading mainly dynamic. Thus, from the functional point of view, what is known as "physiological osteoporosis due to ageing" is nothing more than adaptation by an ageing bone to physical activity, reflecting--like the bone of the young adult--the current loading of the cancellous bone by the actions of the musculoskeletal system. Since such physical activity is often age-related, the performance of the osteoblasts does not depend upon age per se, but merely on the remaining functional adaptive capacities of the ageing organism as whole.

Adaptation, Physiological↗
PubMed1990

Effects of hypothyroidism on bronchial reactivity in non-asthmatic subjects.

The effect of hypothyroidism on non-specific bronchial reactivity was studied in 11 patients without pulmonary disease (mean age 40 (SD 13) years) who had had a total thyroidectomy and radioiodine treatment for thyroid cancer 41 (36) months before the study. All patients when mildly hyperthyroid while having long term thyroxine replacement treatment and once when hypothyroid two weeks after stopping triiodothyronine for the purpose of screening for metastases. Bronchial reactivity was assessed by measuring specific airways conductance (sGaw) after increasing doses of inhaled carbachol (45-1260 micrograms). The dose producing a 35% decrease in sGaw (PD35) was determined from the cumulative log dose-response curve by linear regression analysis. Mean baseline sGaw values were similar when the patients were hypothyroid and when they were hyperthyroid (1.35 (0.36) and 1.41 (0.56) s-1 kPa-1). The interstudy coefficients of variation of baseline sGaw were higher in the thyroid patients than in a euthyroid control group (14% versus 8%). Geometric mean PD35 was lower when the patients were hypothyroid (97 micrograms) than when they were mildly hyperthyroid (192 micrograms). It is concluded that acute hypothyroidism increases non-specific bronchial reactivity in nonasthmatic subjects.

Acute Disease↗
PubMed1990

[Comparative structural analyses of the spongy bone of lumbar and cervical vertebral bodies. Radiological-morphometric and statistical studies].

To investigate the question as to a possible insufficiency of the osteoblasts with increasing age, autopsy material obtained from 105 deceased of both sexes at an age of 16 to 91 in whom clinically manifest bone diseases had been excluded, was studied. The structure of the spongy bone of the 3rd to 5th lumbar vertebral bodies (LVB) and of the 5th to 7th cervical vertebral bodies (CVB) was examined quantitatively-morphometrically, and the results were submitted to a statistical evaluation. In the three LVB, Vv, Sv and S/V behave in a similar manner. Here, Vv and Sv decrease after the age of 50 by more than 1/3, while S/V remains constant throughout live. In all the structural parameters, the three lower CVB have higher values than do the LVB. The age-dependent changes, in contrast, are only very slight. This differing behaviour of the spongy bone in the two regions of the spinal column is an expression of the characteristic loading forces in the respective regions: LVB loading is predominantly static, CVB loading mainly dynamic. Thus, from this functional point of view, physiological osteoporosis due to aging, so-called, is merely an expression of an aging bone adapting - in the same way as the bone of a young adult - to the current loading forces acting upon it.

Adolescent↗
PubMed1990

[Relation of peak flow and spirometry values in patients following bone marrow transplantation].

In about 30% of patients who were subjected to bone marrow transplantation, progressing interstitial and rarely obstructive pulmonary diseases can result in death. Early identification of curable diseases such as pulmonary changes during a "graft versus host reaction" would be desirable. Retrospective evaluation of 159 lung functions in 60 patients after bone marrow transplantation, however, revealed only moderate sensitivity of the peak flow value to vital capacity and FEV1, so that only pathological levels of this parameter will signify noticeable reductions in spirometric values.

Bone Marrow Transplantation↗
PubMed1989

Acute hypothyroidism has no effect on pulmonary vascular resistance.

The effect of acute hypothyroidism on the pulmonary circulation was studied in 9 nonobese athyreotic patients by right heart catheterization at rest and during exercise. The patients were studied while they were hypothyroid 2 weeks after ceasing triiodothyronine treatment and while they were euthyroid on replacement therapy. At rest, pulmonary blood flow [4.0 +/- 0.6 l/min vs 5.8 +/- 1.0 l/min, p less than 0.01] and systolic pulmonary artery pressure [18 +/- 3 mmHg vs 23 +/- 2 mmHg, p less than 0.01] were lower when the patients were hypothyroid than when they were euthyroid. The mean and diastolic pressures in the pulmonary artery and the pulmonary capillary pressures were not different among the groups. Likewise, thyroid hormone levels had no significant effect on pulmonary vascular resistance [100 +/- 25 dyn-s-cm-5 vs 90 +/- 23 dyn-s-cm-5]. With supine exercise, pulmonary blood flow [10.1 +/- 1.6 l/min vs. 13.2 +/- 2.0 l/min, p less than 0.01], mean pulmonary artery pressure [25 +/- 6 mmHg vs 30 +/- 6 mmHg, p less than 0.02], and systolic pulmonary artery pressure [36 +/- 6 mmHg vs 44 +/- 8 mmHg, p less than 0.01] were lower when the patients were hypothyroid. The diastolic pulmonary artery pressure and the pulmonary capillary pressure were similar in both thyroid states. Again, thyroid deficiency had no effect on pulmonary vascular resistance [81 +/- 23 dyn-s-cm-5 vs 76 +/- 24 dyn-s-cm-5]. The lower systolic pressures in the pulmonary artery seen in hypothyroidism are probably due to the decreased systolic volume load of the pulmonary circulation.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1988

Pathophysiological aspects of predominant preload lowering on pulmonary circulation, gas exchange, and the biventricular function in patients with chronic obstructive lung disease.

A group of 21 patients with various degrees of chronic obstructive pulmonary disease underwent radionuclide ventriculography with hemodynamic monitoring to assess the extent to which pulmonary artery pressures and pulmonary vascular resistance can be lowered by the vasodilator molsidomine. Molsidomine (N-carboxy-3-morpholino-sydnonimin-ethylester) is similar to nitroglycerin in its mode of action. After hemodynamic and radionuclide data acquisition, at rest and during submaximal exercise in the steady state, 2 mg molsidomine was injected intravenously. Rest and exercise measurements were repeated 45 min after molsidomine injection. In patients with mild to moderate disease (group 1), pulmonary artery resting pressures decreased by 12% (p less than 0.05) at rest by 22% (p less than 0.01) during exercise after the administration of the drug. Total pulmonary resistance during exercise decreased significantly (p less than 0.01) as a result of marked decrease of pulmonary artery pressure (PAP) compared with a minimal decrease in cardiac index (CI). In patients with severe disease (group 2), only the resting values of PAP decreased while the relationship between pressure and flow was unchanged. During the exercise period, the preload parameters of the right and left ventricles decreased by an average of 30%. With regard to gas exchange, only the arterial PO2 at rest decreased slightly but significantly (p less than 0.05) after molsidomine, while the coefficient of oxygen delivery was not affected by the drug. However, in four patients arterial PO2 was markedly reduced by the drug. Right ventricular ejection fraction increased significantly (p less than 0.01) both at rest and during exercise in group 1 and during exercise in group 2 after administration of molsidomine.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged↗
PubMed1988

Relation of pressure and flow of pulmonary circulation in patients with chronic obstructive pulmonary disease.

A series of 31 patients with various degrees of chronic obstructive pulmonary disease underwent right heart catheterization using flow-directed thermodilution catheters. Both rest and supine exercise values were obtained. The patients were divided into two groups on the basis of their reduction in forced expiratory volume in 1 s (FEV1). In patients with FEV1 values of greater than or equal to 1,300 ml (group 1), the arterial oxygen partial pressure (PaO2) did not significantly change with exercise, while in patients with FEV1 of less than or equal to 1,200 ml (group 2) PaO2 significantly (p less than 0.05) fell in response to exercise. In group 2, a significant increase of total pulmonary resistance (TPR) with exercise was found (p less than 0.01). Pulmonary vascular resistance (PVR) remained unchanged in both subgroups. It is suggested that the value of PVR for subgroup 2 is artificially low because an important variable, namely pulmonary artery wedge pressure, is influenced by alveolar pressure in patients with an uneven distribution of perfusion and ventilation at pulmonary venous pressures lower than alveolar pressure. The steeper slope of the pressure-flow relationship in these patients is probably due to an increased vascular tone caused by chronic hypoxia at rest and further fall of PaO2 and rise of arterial CO2 partial pressure in response to exercise.

Adult↗
PubMed1988

[Continuous subcutaneous insulin infusion in the treatment of insulin-dependent diabetes mellitus].

Intensified insulin delivery has attained significant importance in the treatment of insulin-dependent diabetes to avoid microangiopathy involving the retina and kidney. 15 patients have been treated for periods from 2 month to 3 years, 2 years with continuous subcutaneous insulin infusion. All patients have better metabolic control than that achieved with conventional therapy. HbA1c decreased from 7.8% +/- 1.6 (SD) to 6.2% +/- 1.3 (normal value: 3.8-6.5%). Negative features of insulin-pump therapy include hyperglycemias after discontinuation of insulin infusion and cutaneous infection at the catheter site. No severe episodes of hypoglycemia were observed. Acceptability of pump treatment is good in our patients because of improved physical condition and the ability to pursue their usual activities.

Adolescent↗
PubMed1988

Relation of noninvasive parameters and pulmonary artery mean pressure in patients with chronic obstructive lung disease.

A series of 31 patients with various degrees of chronic obstructive pulmonary disease (COPD) underwent radionuclide ventriculography with right heart catheterization. The patients were divided into 2 groups on the basis of their reduction in forced expiratory volume in 1 s (FEV1). In patients with FEV1 greater than or equal to 1,300 ml (group 1) the oxygen partial pressure (PaO2) did not significantly change with exercise, while in patients with FEV1 less than or equal to 1,200 ml (group 2) the PaO2 significantly decreased (p less than 0.05) with exercise. The groups were significantly different from each other as to the correlation between hemodynamic and noninvasive parameters. In the resting state, the correlation between pulmonary artery mean pressure (PAP) and both residual volume to total lung capacity (RV/TLC) and PaO2 was close only in group 2. By contrast, the right ventricular end diastolic wall thickness (RWD) correlated closely with PAP in both groups. With exercise close correlations were observed between PAP and the noninvasive parameters: RWD, PaO2 and right ventricular ejection fraction in both groups. Arterial CO2 partial pressure (PaCO2) was only increased (greater than or equal to 45 mm Hg) in group 2. This parameter correlated moderately closely with PAP both in the resting and the exercise state only in group 2. The predictive value of PaCO2 greater than or equal to 45 mm Hg for estimation of PAP greater than 35 mm Hg during exercise was 100%. We conclude that separation of patients with COPD into groups with different impairments of the lung function parameter FEV1 can improve the correlation coefficients between noninvasive and invasive parameters. The exercise values obviously correlate more closely than the resting values. An increased value of echocardiographically determined RWD seems to be a reliable parameter for prediction of PAP.

Adult↗