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2. Impact of oscillometric measurement artefacts in ambulatory blood pressure monitoring on estimates of average blood pressure and of its variability: A pilot study

Author

Bothe, T, Bilo, G, Parati, G, Haberl, R, Pilz, N, Patzak, A, Bothe T. L., Bilo G., Parati G., Haberl R., Pilz N., Patzak A., Bothe, T, Bilo, G, Parati, G, Haberl, R, Pilz, N, Patzak, A, Bothe T. L., Bilo G., Parati G., Haberl R., Pilz N., and Patzak A.

Abstract

Objective:Ambulatory blood pressure monitoring (ABPM) plays an important role in the diagnosis of hypertension. However, methodological factors and the measurement conditions affect the results and may lead to incorrect classification of the patient. We performed a pilot study to evaluate the impact of oscillometric measurement artefacts on ABPM-derived variables.Methods:Four classes of artefacts have been detected: motor activity artefacts, cuff errors, cardiovascular arousals, and arrhythmias. The data consisted of uncorrected measurements (all data), corrected measurements (all artefact free data), and artefact affected data.Results:A total of 30 individuals (9 female/21 male), aged between 36 and 86 years, mean: 65.5 (standard deviation: 9.5) were included in the study. The average blood pressure (BP) was higher in artefacts-affected measurements compared the artefact-free measurements both for systolic (4.6 mmHg) and diastolic (1.3 mmHg) measurements. Further, artefact-affected systolic BP (SBP) was 6.4 mmHg higher than artefact-free measurements during daytime. Nocturnal measurements showed no artefact-depended differences. Individual comparisons yielded that 23% of the participants crossed the threshold for BP classification for either 24-h, daytime or nocturnal hypertension when comparing uncorrected and artefact-free measurements. Dipping classification changed within 24% of participants. BP variability was 21 and 12% higher for SPB and DBP, respectively, during daytime. These differences were even higher (27% for SBP and 21% for DPB) during night-time.Conclusion:The study reveals that measurement artefacts are frequently present during cuff-based ABPM and do relevantly affect measurement outcome. Exclusion of measurement artefacts is a promising approach to improving cuff-based ABPM accuracy.

Published
2023

4. Zerebrale Durchblutungsstörungen

Author

Haberl, R. L., Steinbeck, Gerhard, editor, Paumgartner, Gustav, editor, Brandt, T., editor, Göke, B., editor, Greten, N., editor, Hiddemann, W., editor, Lode, H., editor, Mann, K., editor, Riess, H., editor, Risler, T., editor, Schattenkirchner, M., editor, Seeger, W., editor, and Wehling, M., editor

Published
2005
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12. Therapie: Tachykardien

Author

Dorwarth, U., Gerth, A., Haberl, R., Hoffmann, E., Näbauer, M., Reithmann, C., Remp, T., Steinbeck, G., Steinbigler, P., and Erdmann, Erland, editor

Published
2000
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13. Therapie: Bradykardien

Author

Dorwarth, U., Gerth, A., Haberl, R., Hoffmann, E., Näbauer, M., Reithmann, C., Remp, T., Steinbeck, G., Steinbigler, P., and Erdmann, Erland, editor

Published
2000
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18. Zerebrale Durchblutungsstörungen

Author

Haberl, R. L., Paumgartner, Gustav, editor, Brandt, Th., editor, Greten, H., editor, Koch, K. M., editor, Lode, H., editor, van de Loo, J., editor, Schattenkirchner, M., editor, Seeger, W., editor, Steinbeck, G., editor, and Ziegler, R., editor

Published
1999
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28. Constructed Wetlands for Pollution Control : Processes, Performance, Design and Operation

Author

Brix, H., Kadlec, Robert H., Vymazal, J., Cooper, P., Knight, R., and Haberl, R.

Subjects
Technology & Engineering / Environmental / Pollution Control, Science / Environmental Science, Technology & Engineering / Environmental
Abstract

The book presents a comprehensive up-to-date survey of wetland design techniques and operational experience from treatment wetlands. This book is the first and only global synthesis of information related to constructed treatment wetlands. Types of constructed wetlands, major design parameters, role of vegetation, hydraulic patterns, loadings, treatment efficiency, construction, operation and maintenance costs are discussed in depth. History of the use of constructed wetlands and case studies from various parts of the world are included as well. Constructed Wetlands for Pollution Control will be indispensable for wastewater treatment researchers and designers, decision makers in public authorities, wetland engineers, environmentalists and landscape ecologists.

Published
2000

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