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Vogt D, Bianga J, Heider C, Kampwerth A, Künnemann K, Riemer T, Seidensticker T. With a little help from my friends – Homogeneous catalysis and reaction engineering in the sustainable production of amines. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202255391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Huseynov A, Baumann S, Nef H, Riemer T, Schneider S, Pfannebecker T, Achenbach S, Mehilli J, Gori T, Woehrle J, Zahn R, Schmermund A, Richard G, Hamm C, Akin I. P2809Comparison between treatment of “established” versus complex “off-label” coronary lesions with Absorb bioresorbable scaffold implantation: results from the GABI-R registry. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.1121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Objectives
The purpose of this study was to compare the clinical outcomes of patients treated with bioresorbable scaffold (BRS) for off-label versus approved indications.
Background
The BRS promised some advantages in terms of complete biodegradation, however, the implication of BRS for off-label indications is not well described.
Methods
The short- and long-term outcome after implantation of a bioresorbable scaffold system (ABSORB, Abbott Vascular, USA) was evaluated in the prospective, non-interventional, multicenter real-world German-Austrian ABSORB RegIstRy (GABI-R).
Results
A total of 3,188 patients were enrolled. Patients were divided into two groups: on-label BRS use (33.0%) and off-label use (66.9%) if at least one off-label use criteria was met. The incidence of scaffold thrombosis in confirmed cases was significantly higher in off-label group (1.36% vs. 0.57%, p=0.04; OR 2.41 (95% CI: 1.00–5.82) with also a trend towards higher myocardial infarction rate (2.39% vs. 1.42%, p=0.077; OR 1.70 (95% CI: 0.95–3.03) and cardiovascular death (1.27% vs. 1.14%, p=0.76, OR 1.11 (95% CI: 0.56–2.21) at 6 months follow up.
Clinical outcome at 6 months Total Off-label On-label p-value* OR (95%-CI) Patients with 6m FU record 99.0% 99.0% 99.1% 0.82 0.92 (0.43–1.95) Confirmed cardiovascular death 1.22% 1.27% 1.14% 0.76 1.11 (0.56–2.21) Confirmed non-cardiovascular death 0.22% 0.14% 0.38% 0.18 0.37 (0.08–1.66) Cause unknown 0.22% 0.28% 0.09% 0.29 2.97 (0.36–24.73) Hospitalisation 27.5% 27.9% 26.7% 0.51 1.06 (0.89–1.27) MI 2.07% 2.39% 1.42% 0.07 1.70 (0.95–3.03) ARC definite scaffold thrombosis 1.10% 1.36% 0.57% 0.04 2.41 (1.00–5.82) TLF 2.70% 3.00% 2.09% 0.13 1.45 (0.89–2.37) TVF 3.98% 4.31% 3.32% 0.18 1.31 (0.88–1.95) MACE 4.33% 4.64% 3.70% 0.22 1.27 (0.87–1.85) Values are mean ± standard deviation (SD) or number and percentage (n, %). *Comparison between off-label and on-label use. The p-values are from Chi-squared test or Mann-Whitney-Wilcoxon test. ARC, academic research consortium; FU, follow up; MACE, major adverse cardiac events; PCI, percutaneous coronary intervention; TLF, target lesion failure; TVF, target vessel failure.
Kaplan-Meyer curve stent thrombosis
Conclusions
The off-label use of BRS compared to confirmed indications appears to be associated with a higher rate of clinical endpoints considering more complex lesions and higher morbidity in this patients' group.
Acknowledgement/Funding
This research was supported by a grant from Abbott Vascular.
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Affiliation(s)
- A Huseynov
- University Medical Centre of Mannheim, Mannheim, Germany
| | - S Baumann
- University Medical Centre of Mannheim, Mannheim, Germany
| | - H Nef
- University Hospital Giessen and Marburg, Giessen, Germany
| | - T Riemer
- Heart Attack Research Center, Ludwigshafen am Rhein, Germany
| | - S Schneider
- Heart Attack Research Center, Ludwigshafen am Rhein, Germany
| | | | - S Achenbach
- University of Erlangen-Nuremberg, Erlangen, Germany
| | - J Mehilli
- Central Hospital Bad Berka, Bad Berka, Germany
| | - T Gori
- University Medical Center of Mainz, Mainz, Germany
| | | | - R Zahn
- Klinikum Ludwigshafen, Ludwigshafen am Rhein, Germany
| | - A Schmermund
- CardioVascular Center Bethanien (CCB), Frankfurt am Main, Germany
| | - G Richard
- Heart Center Bad Segeberg, Bad Segeberg, Germany
| | - C Hamm
- University Hospital Giessen and Marburg, Giessen, Germany
| | - I Akin
- University Medical Centre of Mannheim, Mannheim, Germany
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Troebs M, Achenbach S, Nef H, Wiebe J, Kastner J, Mehili J, Muenzel T, Naber C, Neumann T, Richard G, Schmermundt A, Woehrle J, Zahn R, Riemer T, Hamm C. P798Outcome of percutaneous coronary intervention with everolimus-eluting bioresorbable vascular scaffolds in patients with STEMI as compared to stable CAD 2 year results from the German-Austrian ABSORB. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M Troebs
- Friedrich Alexander University, Department of Cardiology, Erlangen, Germany
| | - S Achenbach
- Friedrich Alexander University, Department of Cardiology, Erlangen, Germany
| | - H Nef
- University Hospital Giessen and Marburg, Department of Cardiology, Giessen, Germany
| | - J Wiebe
- German Heart Center of Munich, Deutsches Herzzentrum München, Munich, Germany
| | - J Kastner
- Medical University of Vienna, Vienna, Austria
| | - J Mehili
- Ludwig-Maximilians University, Department of Cardiology, Munich, Germany
| | - T Muenzel
- Johannes Gutenberg University Mainz (JGU), Department of Medicine II, University Medical Center, Mainz, Germany
| | - C Naber
- Elisabeth Hospital, Essen, Germany
| | - T Neumann
- University Hospital of Essen (Ruhr), Department of Cardiology, Essen, Germany
| | - G Richard
- Heart Center Bad Segeberg, Bad Segeberg, Germany
| | - A Schmermundt
- Cardiology Centre Bethanien (CCB), Frankfurt am Main, Germany
| | - J Woehrle
- University of Ulm, 11Department of Internal Medicine II, Ulm, Germany
| | - R Zahn
- Hear Center Ludwigshafen, Ludwigshafen, Germany
| | - T Riemer
- Stiftung Institut für Herzinfarktforschung, Ludwigshafen, Germany
| | - C Hamm
- Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
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Abstract
PURPOSE The study examined the influence of individual blood pressure changes overtime on retinal vessel diameter and the latter's response to flicker light. METHODS The diameter of a retinal arterial and venous segment was measured continuously on-line with a Dynamic Vessel Analyzer in 20 patients twice (mean interval between examinations of 24 months). Eleven patients had no cardiovascular disease. Nine patients had arterial hypertension and were untreated at the time of the first measurement; at the time of the second measurement they were undergoing various antihypertensive therapies. Each test consisted of a 50-s baseline plus three 20-s periods of flicker stimulation followed by an 80-s period of observation. During the examinations the blood pressure was measured at 1-minute intervals. RESULTS In the hypertension group changes in the mean arterial blood pressure (MAP) correlated significantly with changes in the arterial baseline diameter (y = -0.1 - 0.37x, r =0.74, p (increase) <0.03). A comparison of the two measurements showed no such relationship in the group of cardiovascularly healthy subjects. The venous baseline and the arterial and venous flicker response did not change significantly in either group between the two measurements and showed no relationship to blood pressure changes. CONCLUSIONS In hypertensive subjects, long-term therapy-related changes in blood pressure induced a change in the arterial baseline by approximately +3.7 microm/-10 mmHg MAP. An influence of lowering MAP to the arterial flicker response could not be detected.
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Affiliation(s)
- E Nagel
- Technical University, Ilmenau, Germany.
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Korchak S, Riemer T, Kilian W, Mitschang L. Quantitative biosensor detection by chemically exchanging hyperpolarized 129Xe. Phys Chem Chem Phys 2018; 20:1800-1808. [DOI: 10.1039/c7cp07051a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantitative modeling and evaluation of biosensor detection by hyperpolarized 129Xe chemical exchange saturation transfer (Hyper-CEST).
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Affiliation(s)
- S. Korchak
- Physikalisch-Technische Bundesanstalt (PTB)
- 10587 Berlin
- Germany
| | - T. Riemer
- University of Leipzig
- Medical Department
- Institute of Medical Physics and Biophysics
- 04107 Leipzig
- Germany
| | - W. Kilian
- Physikalisch-Technische Bundesanstalt (PTB)
- 10587 Berlin
- Germany
| | - L. Mitschang
- Physikalisch-Technische Bundesanstalt (PTB)
- 10587 Berlin
- Germany
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Epstein L, Koch J, Riemer T, Haquin G, Orion I. AN ESTIMATION OF THE EXPOSURE OF THE POPULATION OF ISRAEL TO NATURAL SOURCES OF IONIZING RADIATION. Radiat Prot Dosimetry 2017; 176:264-268. [PMID: 28338797 DOI: 10.1093/rpd/ncx005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 01/12/2017] [Indexed: 06/06/2023]
Abstract
The radiation dose to the population of Israel due to exposure to natural sources of ionizing radiation was assessed. The main contributor to the dose is radon that accounts for 60% of the exposure to natural sources. The dose due to radon inhalation was assessed by combining the results of a radon survey in single-family houses with the results of a survey in apartments in multi-storey buildings. The average annual dose due to radon inhalation was found to be 1.2 mSv. The dose rate due to exposure to cosmic radiation was assessed using a code that calculates the dose rate at different heights above sea level, taking into account the solar cycle. The annual dose was calculated based on the fraction of time spent indoors and the attenuation provided by buildings and was found to be 0.2 mSv. The annual dose due to external exposure to the terrestrial radionuclides was similarly assessed. The indoor dose rate was calculated using a model that takes into account the concentrations of the natural radionuclides in building materials, the density and the thickness of the walls. The dose rate outdoors was calculated based on the concentrations of the natural radionuclides in different geological units in Israel as measured in an aerial survey and measurements above ground. The annual dose was found to be 0.2 mSv. Doses due to internal exposure other than exposure to radon were also calculated and were found to be 0.4 mSv. The overall annual exposure of the population of Israel to natural sources of ionizing radiation is therefore 2 mSv and ranges between 1.7 and 2.7 mSv.
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Affiliation(s)
- L Epstein
- Radiation Safety Division, Soreq Nuclear Research Center, Yavne 81800, Israel
- Department of Nuclear Engineering, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - J Koch
- Radiation Safety Division, Soreq Nuclear Research Center, Yavne 81800, Israel
| | - T Riemer
- Radiation Safety Division, Soreq Nuclear Research Center, Yavne 81800, Israel
| | - G Haquin
- Radiation Safety Division, Soreq Nuclear Research Center, Yavne 81800, Israel
| | - I Orion
- Department of Nuclear Engineering, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
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Vitzthum K, Thielke L, Deter A, Riemer T, Eggeling S, Pankow W, Mache S. Smoking Lung Cancer Patients and Tobacco Cessation - Is the Current Treatment in Germany Sufficient? Pneumologie 2015; 69:667-72. [PMID: 26398407 DOI: 10.1055/s-0034-1392960] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Lung cancer is the most preventable neoplastic disease for men and women. The incidence rate per year is 14.000 in Germany. Smoking is the main risk factor for the onset of lung cancer and for a share of 90% of cases, lung cancer is associated with smoking. Recent studies have shown that the time slot of diagnosing lung cancer is a teachable moment for tobacco cessation interventions. The therapy that was rated most effective was a combination of cognitive behavioral therapy and pharmacotherapy (e. g. NRT, Bupropion, Varenicline). We examined the smoking status of all patients undergoing lung cancer surgery in 2011, 2012 and 2013 in this study. A retrospective semi structured interview via telephone was conducted regarding smoking habits and current quality of life. 131 patients (36.6% female, average age of 68.7 years) of an urban German hospital were included.Results showed a relapse rate of 22.3%, while 86.2% used to be highly addicted smokers; A multivariate analysis of covariance (MANCOVA) indicated a significant overall impact of smoking status on quality of life with a medium effect size, controlled for age, gender, living conditions, tumor stage, duration of smoking abstinence, type of cancer therapy, type of resection method, and the time period between the date of surgery and of the survey. Two thirds of all smokers did not see an association between their habit and their disease.So far motivation to quit and long term abstinence rates are not sufficiently established even among seriously sick patients in Germany; further initiatives should focus on new and more intense interventions and educational strategies.
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Affiliation(s)
- K Vitzthum
- Vivantes - Netzwerk für Gesundheit GmbH, Berlin
| | - L Thielke
- Humboldt University Berlin - Institute of Psychology
| | - A Deter
- Institute of Occupational Medicine - Charité - Universitymedicine Berlin
| | - T Riemer
- Humboldt University Berlin - Institute of Psychology
| | - S Eggeling
- Vivantes - Netzwerk für Gesundheit GmbH, Berlin
| | - W Pankow
- Vivantes - Netzwerk für Gesundheit GmbH, Berlin
| | - S Mache
- Institute of Occupational, Social and Environmental Medicine - Hamburg
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Abstract
The average radon concentration in Israeli dwellings was assessed by combining the results of a 2006 radon survey in single-family houses with the results of a 2011 radon survey in apartments of multistorey buildings. Both surveys were based on long-term measurements using CR-39 detectors. The survey in multistorey buildings was intended to assess the influence of recent practices in the local building industry on the radon concentrations. These practices include the use of building materials with higher concentrations of the natural radionuclides in the last 20 y than before, as well as the improvement in sealing techniques over that period. Another practice in place since the early 1990 s is the building of a shielded area in every apartment that is known as an RSS (residential secure space). The RSS is a room built from massive concrete walls, floor and ceiling that can be hermetically sealed and is intended to protect its residents from a missile attack. The influence of the above-mentioned features on radon concentrations was estimated by dividing the participating apartments into two groups: apartments in buildings >20 y, built using building materials with low concentrations of the natural radionuclides, regular sealing and without an RSS and apartments in buildings newer than 10 y, built using building materials with higher concentrations of the natural radionuclides, improved sealing and including an RSS. It was found that the average radon concentration in apartments in new buildings was significantly higher than in old buildings and the average radon concentration in single-family houses was significantly higher than in apartments in multistorey buildings. Doses due to indoor radon were estimated on the basis of the updated information included in the 2009 International Commission on Radiological Protection statement on radon.
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Affiliation(s)
- L Epstein
- Radiation Safety Division, Soreq Nuclear Research Center, Yavne 81800, Israel Department of Nuclear Engineering, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - J Koch
- Radiation Safety Division, Soreq Nuclear Research Center, Yavne 81800, Israel
| | - T Riemer
- Radiation Safety Division, Soreq Nuclear Research Center, Yavne 81800, Israel
| | - I Orion
- Department of Nuclear Engineering, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - G Haquin
- Radiation Safety Division, Soreq Nuclear Research Center, Yavne 81800, Israel
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Friedrich S, Zeymer U, Dechend R, Hagedorn I, Riemer T, Zemmrich C, Bramlage P, Pittrow D, Senges J, Schmieder RE. The impact of age on the benefits and risks of aliskiren treatment: analyses of the 3A registry. J Hum Hypertens 2014; 29:316-23. [PMID: 25273857 DOI: 10.1038/jhh.2014.86] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 08/04/2014] [Accepted: 08/11/2014] [Indexed: 11/09/2022]
Abstract
We aimed to analyze benefits and risks of aliskiren treatment in older adults (⩾ 65 years) in clinical practice. Patients (n = 14,986) were assigned to either aliskiren (ALIS), an angiotensin-converting-enzyme inhibitor or angiotensin receptor blocker (ACEi/ARB), or an agent not blocking the renin-angiotensin system (non-RAS). Older adults (n = 7396) had a longer history of hypertension (8.7 vs 4.7 years; P < 0.0001), lower mean diastolic blood pressure (DBP; 87.7 ± 11.0 vs 92.1 ± 11.0 mm Hg) and more renal (12.0 vs 5.6%; P < 0.0001) or cardiovascular disease (44.0 vs 18.9%; P < 0.0001); 4548 received aliskiren (68.8%), 1215 ACEi/ARBs (18.4%) and 850 non-RAS treatments (12.9%). Office BP at 1 year was reduced by 18.4 ± 21.5/7.2 ± 12.0 mm Hg. BP reductions were greater (19.5 ± 21.7/7.6 ± 12.1 mm Hg) in the aliskiren group than in the ACEi/ARB (15.6 ± 20.9/6.4 ± 11.9) and non-RAS groups (16.1 ± 20.7/6.5 ± 11.7 mm Hg), respectively (P<0.0001 for systolic BP (SBP) and <0.01 for DBP). After multivariable adjustment, differences in SBP reductions were clinically irrelevant and no differences were noted for DBP. Adverse effects were higher in older adults with no differences between treatment groups. In conclusion, the present analysis of a large, unselected cohort of patients in clinical practice from the 3A study, offers real-life evidence of the effectiveness and safety of aliskiren for the treatment of hypertension in older adults.
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Affiliation(s)
- S Friedrich
- Nephrologie und Hypertensiologie, Universitätsklinikum Erlangen, Erlangen, Germany
| | - U Zeymer
- 1] Institut für Herzinfarktforschung Ludwigshafen, Ludwigshafen, Germany [2] Medizinische Klinik B, Klinikum der Stadt Ludwigshafen, Ludwigshafen, Germany
| | - R Dechend
- Experimental and Clinical Research Center, Charité Campus Buch, HELIOS-Klinikum Berlin, Berlin, Germany
| | - I Hagedorn
- Clinical and Regulatory Affairs, Novartis Pharma GmbH, Nürnberg, Germany
| | - T Riemer
- Institut für Herzinfarktforschung Ludwigshafen, Ludwigshafen, Germany
| | - C Zemmrich
- Institut für Pharmakologie und präventive Medizin, Mahlow, Germany
| | - P Bramlage
- Institut für Pharmakologie und präventive Medizin, Mahlow, Germany
| | - D Pittrow
- Institute for Clinical Pharmacology, Medical Faculty, Technical University Dresden, Germany
| | - J Senges
- Institut für Herzinfarktforschung Ludwigshafen, Ludwigshafen, Germany
| | - R E Schmieder
- Nephrologie und Hypertensiologie, Universitätsklinikum Erlangen, Erlangen, Germany
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Kirilina E, Kühne A, Lindel T, Hoffmann W, Rhein KH, Riemer T, Seifert F. Current CONtrolled Transmit And Receive Coil Elements (CONTAR) for Parallel Acquisition and Parallel Excitation Techniques at High-Field MRI. Appl Magn Reson 2011; 41:507-523. [PMID: 22162914 PMCID: PMC3215873 DOI: 10.1007/s00723-011-0248-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2011] [Revised: 07/11/2011] [Indexed: 05/26/2023]
Abstract
A novel intrinsically decoupled transmit and receive radio-frequency coil element is presented for applications in parallel imaging and parallel excitation techniques in high-field magnetic resonance imaging. Decoupling is achieved by a twofold strategy: during transmission elements are driven by current sources, while during signal reception resonant elements are switched to a high input impedance preamplifier. To avoid B(0) distortions by magnetic impurities or DC currents a resonant transmission line is used to relocate electronic components from the vicinity of the imaged object. The performance of a four-element array for 3 T magnetic resonance tomograph is analyzed by means of simulation, measurements of electromagnetic fields and bench experiments. The feasibility of parallel acquisition and parallel excitation is demonstrated and compared to that of a conventional power source-driven array of equivalent geometry. Due to their intrinsic decoupling the current-controlled elements are ideal basic building blocks for multi-element transmit and receive arrays of flexible geometry.
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Affiliation(s)
- E. Kirilina
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2-12, 10587 Berlin, Germany
- Free University of Berlin, Habelschwerdter Allee 45, 14195 Berlin, Germany
| | - A. Kühne
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2-12, 10587 Berlin, Germany
| | - T. Lindel
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2-12, 10587 Berlin, Germany
| | - W. Hoffmann
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2-12, 10587 Berlin, Germany
| | - K. H. Rhein
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2-12, 10587 Berlin, Germany
| | - T. Riemer
- University of Leipzig, Härtelstraße 16-18, 04107 Leipzig, Germany
| | - F. Seifert
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2-12, 10587 Berlin, Germany
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Schleif FM, Riemer T, Börner U, Schnapka-Hille L, Cross M. Genetic algorithm for shift-uncertainty correction in 1-D NMR-based metabolite identifications and quantifications. Bioinformatics 2010; 27:524-33. [PMID: 21123223 DOI: 10.1093/bioinformatics/btq661] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
MOTIVATION The analysis of metabolic processes is becoming increasingly important to our understanding of complex biological systems and disease states. Nuclear magnetic resonance spectroscopy (NMR) is a particularly relevant technology in this respect, since the NMR signals provide a quantitative measure of the metabolite concentrations. However, due to the complexity of the spectra typical of biological samples, the demands of clinical and high-throughput analysis will only be fully met by a system capable of reliable, automatic processing of the spectra. An initial step in this direction has been taken by Targeted Profiling (TP), employing a set of known and predicted metabolite signatures fitted against the signal. However, an accurate fitting procedure for (1)H NMR data is complicated by shift uncertainties in the peak systems caused by measurement imperfections. These uncertainties have a large impact on the accuracy of identification and quantification and currently require compensation by very time consuming manual interactions. Here, we present an approach, termed Extended Targeted Profiling (ETP), that estimates shift uncertainties based on a genetic algorithm (GA) combined with a least squares optimization (LSQO). The estimated shifts are used to correct the known metabolite signatures leading to significantly improved identification and quantification. In this way, use of the automated system significantly reduces the effort normally associated with manual processing and paves the way for reliable, high-throughput analysis of complex NMR spectra. RESULTS The results indicate that using simultaneous shift uncertainty correction and least squares fitting significantly improves the identification and quantification results for (1)H NMR data in comparison to the standard targeted profiling approach and compares favorably with the results obtained by manual expert analysis. Preservation of the functional structure of the NMR spectra makes this approach more realistic than simple binning strategies.
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Affiliation(s)
- F-M Schleif
- Department of Computer Science, University of Bielefeld, Bielefeld, Germany.
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13
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Nimptsch K, Süß R, Riemer T, Nimptsch A, Schnabelrauch M, Schiller J. Differently complex oligosaccharides can be easily identified by matrix-assisted laser desorption and ionization time-of-flight mass spectrometry directly from a standard thin-layer chromatography plate. J Chromatogr A 2010; 1217:3711-5. [DOI: 10.1016/j.chroma.2010.04.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Revised: 03/29/2010] [Accepted: 04/06/2010] [Indexed: 10/19/2022]
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Mouchtouri VA, Bartlett CLR, Jaremin B, Nichols G, Paux T, Riemer T, Black N, Varela-Martinez C, Swaan CM, Schlaich C, Rachiotis G, Kremastinou J, Hadjichristodoulou C. The decision making process on public health measures related to passenger ships: the example of influenza pandemic 2009. Int Marit Health 2010; 62:241-245. [PMID: 21348018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
BACKGROUND Public health measures at sea ports have posed a challenge for public health competent authorities, especially in the context of the influenza pandemic of 2009. This paper discusses the response of authorities to notifications of infectious diseases on passenger ships and the importance of assessing the risks related to cases of influenza. It further provides options for health measures and considerations for decision making during a pandemic such as the influenza pandemic of 2009. DISCUSSION Prevention and control of influenza have included action taken by both competent port authorities and ships' crews. Assessing the public health risk of each event reported from ships to competent authorities at ports is important before advice is given on implementation of control measures. Public health risk assessment involves appraisal of threats to passengers and crew on board the ship as well as to the population in the community. SUMMARY Any public health measures taken should be necessary and proportional to the threat. Measures at ports cannot alone be effective in the prevention of the spread of a disease to the community since other means of transport play a major role. Measures taken on board ships can be effective in containing the disease. Consistent policy based on common protocols and carried out by competent authorities at local, national, European, or international levels are essential.
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Affiliation(s)
- V A Mouchtouri
- Department of Hygiene and Epidemiology, Faculty of Medicine, University of Thessaly, Larissa, Greece
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Mouchtouri V, Black N, Nichols G, Paux T, Riemer T, Rjabinina J, Schlaich C, Menel Lemos C, Kremastinou J, Hadjichristodoulou C. Preparedness for the prevention and control of influenza outbreaks on passenger ships in the EU: the SHIPSAN TRAINET project communication. ACTA ACUST UNITED AC 2009; 14. [PMID: 19480810 DOI: 10.2807/ese.14.21.19219-en] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Passenger ships carry a large number of people in confined spaces. A case of the new influenza A (H1N1) virus aboard a passenger ship is an expected event and would lead to rapid spread of the virus, if preventive measures are not in place. However, many cruise lines have detailed policies and procedures to deal with cases of influenza like illness (ILI). The EU SHIPSAN and SHIPSAN TRAINET projects include in their objectives guidelines for the prevention and control of communicable diseases aboard passenger ships. A literature review showed that from 1997 to 2005, nine confirmed outbreaks of influenza were linked to passenger ships, with attack rates up to 37%. It is important to establish and maintain a surveillance system for ILI aboard passenger ships, in order to systematically collect data that can help to determine the baseline illness levels. Monitoring these will enable early identification of outbreaks and allow timely implementation of control measures.
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Affiliation(s)
- Va Mouchtouri
- Department of Hygiene and Epidemiology, Faculty of Medicine, University of Thessaly, Larissa, Greece
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Abstract
Ischaemia, loss of neural tissue, glial cell activation and tissue remodelling are symptoms of anterior ischaemic as well as glaucomatous optic neuropathy leading to pallor of the optic nerve head. Here, we describe a simple method for the pallor measurement using a fundus camera equipped with a colour CCD camera and a special dual bandpass filter. The reproducibility of the determined mean pallor value was 11.7% (coefficient of variation for repeated measurements in the same subject); the variation over six healthy subjects was 14.8%. A significant difference between the mean pallor of an atrophic disc and that of the contralateral eye of the same individual was found. However, even the clinically unaffected eye showed a significantly increased pallor compared to the mean of the healthy control group. Thus, optic disc pallor measurement, as described here, may be helpful in the early detection and follow-up of optic neuropathy.
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Affiliation(s)
- W Vilser
- Imedos GmbH, Am Nasstal 4, 07751 Jena, Germany
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Abstract
BACKGROUND Static vessel analysis is a method to determine the diameter of retinal vessels in images of the ocular fundus. The suitability of non-mydriatic and mydriatic images for that method and the influence of mydriasis on the results were examined. MATERIALS AND METHODS In the prospective study, 30 eyes of 15 patients (10 women, mean age 51.6 +/- 13.2 years) were examined. At first, 3 images were taken of each eye with the retinal camera Topcon NW 200 (magnification 1). After pupil dilation with tropicamid eye drops, 3 more images were taken using the Topcon and 3 others using the system Visualis (IMEDOS, Jena/Germany, FF450plus, 535-561 nm, 30 degrees image, 1840 x 1360 pixel). The vessel diameters were measured with the software Vesselmap2 (IMEDOS). The investigator assigned vessels to arteries or veins and their diameters were calculated automatically by the software. There is the possibility to define the vessel edge manually in cases of a poor image quality. The calculation of the central retinal arterial and venous equivalent (CRAE, CRVE) as well as the arterio-venous ratio (AVR) were made according to the formula of Parr-Hubbard. Furthermore, the nasal retinal vessels > 60 microm were examined to estimate the influence of tropicamid on the vessel diameter. RESULTS Because of insufficient illumination and poor contrast in 21 % of the non-mydriatic images not all vessels could be detected automatically. Additionally, fewer vessels could be detected in 7 % of the non-mydriatic images compared to the mydriatic images. The average coefficient of variation of CRAE and AVR of each triplet of images was higher in non-mydriatic images (2.6 % and 3.2 %, respectively) than in mydriatic images of the Topcon (1.8 %; 2.3 %) and the FF 450 (1.7 %; 1.8 % ANOVA p < 0.05). No significant differences were found between the various examination methods for both the coefficient of variation of CRVE (1.9 %; 1.8 %; 1.7 %) and the average values of CRAE, CRVE and AVR. With regard to their diameters, the nasal retinal arteries and veins > 60 microm, were depicted sufficiently in all images, and only differed insignificantly between the three methods. CONCLUSION The quality of non-mydriatic images is often lower than that of mydriatic images. This fact can account for the high variance of measured parameters in the non-mydriatic images. The depiction of all relevant vessel segments is a precondition for the image-based analysis. An influence of the mydriasis caused by tropicamid on the retinal vessel diameters > 60 microm was not found.
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Affiliation(s)
- E Nagel
- Augenarztpraxis, Rudolstadt.
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Nagel E, Vilser W, Fink A, Riemer T. Statische Gefäßanalyse in mydriatischen und nonmydriatischen Fundusbildern. Klin Monbl Augenheilkd 2006. [DOI: 10.1055/s-2006-954619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Abstract
AIM The study investigated the variance of the retinal vessel response to flicker light between the right and left eyes and after a short and a medium-length time interval. METHODS The prospective study included 28 volunteers. In the first exam both eyes were examined. One eye selected randomly was measured again after 1 h and after 1 month. The diameter response of an arterial and venous vessel segment was measured continuously by a Dynamic Vessel Analyzer (DVA, IMEDOS, Jena). Each examination consisted of 50 s baseline measurement and three periods of 20-s flicker light provocation followed by 80 s observation. The mean of three provocational cycles was calculated as dynamic vessel response. RESULTS A significant correlation of the flicker response parameters between the right and left eyes was found. Arterial and venous baseline diameter, flicker light dilation, AVDQ, and BP did not change significantly between the first and follow-up examinations. There was no correlation between changes of BP and changes of vessel diameter parameters in the follow-up exams. CONCLUSION Flicker-evoked dilation of retinal arterioles measured by the DVA is characterized under similar conditions by small variance after short and medium-length time periods. Therefore, this parameter is suitable as a functional parameter of the regulation ability of retinal arteries.
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Affiliation(s)
- E Nagel
- Augenarztpraxis, Rudolstadt.
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Nagel E, Vilser W, Riemer T, Finck A. Statische und dynamische retinale Gefäßanalyse in der augenärztlichen Praxis. Ein erster Erfahrungsbericht. Klin Monbl Augenheilkd 2004. [DOI: 10.1055/s-2004-836177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Nagel E, Vilser W, Riemer T. Retinal Vessel Analysis for the Morphological and Functional Examination of a Central Microcirculation Area – A New Clinical Method. KLIN NEUROPHYSIOL 2004. [DOI: 10.1055/s-2004-832104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Boymann S, Maschotta R, Steuer D, Riemer T. METHODE ZUR UNTERSUCHUNG DES DYNAMISCHEN VERHALTENS VON NETZHAUTGEFÄSSEN. BIOMED ENG-BIOMED TE 2003. [DOI: 10.1515/bmte.2003.48.s1.354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Riemer T. [The long road to nursing diagnoses in child and adolescent nursing]. Kinderkrankenschwester 2001; 20:207-8. [PMID: 14584155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Affiliation(s)
- T Riemer
- Berufsverband Kinderkrankenpflege Osterreich Postfach 67 A-1095 Wien.
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Riemer T, Schmidt B, Behrens H, Dupree R. H2O/OH ratio determination in hydrous aluminosilicate glasses by static proton NMR and the effect of chemical shift anisotropy. Solid State Nucl Magn Reson 2000; 15:201-207. [PMID: 10772260 DOI: 10.1016/s0926-2040(99)00059-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Static 1H NMR spectra of hydrous NaAlSi3O8 glasses have been acquired at low temperature (140 K) in order to quantitatively determine OH and H2O concentrations. Since both components overlap in the spectra, an unambiguous determination of the line shapes is required. The structurally bonded hydroxyl groups are well described by a Gaussian line and the water molecules exhibit a Pake doublet-like line shape due to the strong proton-proton dipolar interaction. However, at proton resonance frequencies used in this study (360 MHz), the Pake doublet has an asymmetric line shape due to chemical shift anisotropy (CSA), which is significant and must be included in any simulation in order to reproduce the experimental line shape successfully. The simulations for rigid water molecules dissolved in our hydrous aluminosilicate glasses result in a CSA of 30+/-5 ppm and a dipolar interaction constant of 63.8+/-2.5 kHz (i.e., dipolar coupling constant (DCC) of 42.6+/-1.7 kHz), corresponding to a proton-proton distance of r(ij) = 154+/-2 pm. In contrast to earlier work, water speciation obtained from the simulations of our 1H NMR spectra are in excellent agreement with those obtained from infrared (IR) spectroscopy.
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Affiliation(s)
- T Riemer
- Department of Physics, University of Warwick, Coventry, UK
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Blum M, Bachmann K, Wintzer D, Riemer T, Vilser W, Strobel J. Noninvasive measurement of the Bayliss effect in retinal autoregulation. Graefes Arch Clin Exp Ophthalmol 1999; 237:296-300. [PMID: 10208262 DOI: 10.1007/s004170050236] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Abstract
PURPOSE The Bayliss effect describes the reaction of smooth muscle cells in the arterial wall to changes in blood pressure. A rise in mean arterial blood pressure (MAP) causes an autoregulatory myogenic vessel constriction by smooth muscle cells in the arterial wall. The responsiveness of retinal vessels to changes in MAP were analyzed using the Retinal Vessel Analyzer (RVA). METHODS Continuous measurement of retinal arterial vessels was performed in 40 healthy volunteers (age 18-56 years.) over a 9-min period. After a 3-min baseline measurement (phase I), isometric exercise caused a rise in MAP over the next 3 min (phase II). During the last 3 min (phase III) recovery was observed. Blood pressure and ECG were documented simultaneously throughout the experiment. RESULTS Exercise caused a significant rise of 22.8 (+/-6.0) mm Hg in MAP (phase II vs. phase I: P<0.001). Retinal arterioles showed 5.5% (+/-2.8%) vasoconstriction (P<0.001). During phase III vessel diameters returned to normal, with no difference from phase I (P = 0.179). CONCLUSION Noninvasive measurement and quantitative analysis of the Bayliss effect in human retinal vessels by means of the RVA is possible. Analysis of retinal arterial autoregulation may provide valuable insight into pathologic conditions such as diabetic or hypertensive retinopathy.
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Affiliation(s)
- M Blum
- Department of Ophthalmology, Friedrich Schiller University Jena, Germany
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Affiliation(s)
- D. Spielbauer
- Institut für Physikalische Chemie, Universität München, Sophienstrasse 11, 80333 Munich, Germany
| | - G. A. H. Mekhemer
- Institut für Physikalische Chemie, Universität München, Sophienstrasse 11, 80333 Munich, Germany
| | - T. Riemer
- Institut für Physikalische Chemie, Universität München, Sophienstrasse 11, 80333 Munich, Germany
| | - M. I. Zaki
- Institut für Physikalische Chemie, Universität München, Sophienstrasse 11, 80333 Munich, Germany
| | - H. Knözinger
- Institut für Physikalische Chemie, Universität München, Sophienstrasse 11, 80333 Munich, Germany
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Worbes M, Bonn S, Riemer T. Methoden zur Erfassung von Zuwachsverlusten und mögliche Einflußfaktoren auf das Jahresringbild von Bäumen in geschädigten Waldbeständen. ACTA ACUST UNITED AC 1995. [DOI: 10.1007/bf02742236] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Riemer T. Model of retinal microcirculation. Vision Res 1995. [DOI: 10.1016/0042-6989(95)98603-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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