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Grelet C, Larsen T, Crowe MA, Wathes DC, Ferris CP, Ingvartsen KL, Marchitelli C, Becker F, Vanlierde A, Leblois J, Schuler U, Auer FJ, Köck A, Dale L, Sölkner J, Christophe O, Hummel J, Mensching A, Fernández Pierna JA, Soyeurt H, Calmels M, Reding R, Gelé M, Chen Y, Gengler N, Dehareng F. Prediction of key milk biomarkers in dairy cows through milk mid-infrared spectra and international collaborations. J Dairy Sci 2024; 107:1669-1684. [PMID: 37863287 DOI: 10.3168/jds.2023-23843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 09/23/2023] [Indexed: 10/22/2023]
Abstract
At the individual cow level, suboptimum fertility, mastitis, negative energy balance, and ketosis are major issues in dairy farming. These problems are widespread on dairy farms and have an important economic impact. The objectives of this study were (1) to assess the potential of milk mid-infrared (MIR) spectra to predict key biomarkers of energy deficit (citrate, isocitrate, glucose-6 phosphate [glucose-6P], free glucose), ketosis (β-hydroxybutyrate [BHB] and acetone), mastitis (N-acetyl-β-d-glucosaminidase activity [NAGase] and lactate dehydrogenase), and fertility (progesterone); (2) to test alternative methodologies to partial least squares (PLS) regression to better account for the specific asymmetric distribution of the biomarkers; and (3) to create robust models by merging large datasets from 5 international or national projects. Benefiting from this international collaboration, the dataset comprised a total of 9,143 milk samples from 3,758 cows located in 589 herds across 10 countries and represented 7 breeds. The samples were analyzed by reference chemistry for biomarker contents, whereas the MIR analyses were performed on 30 instruments from different models and brands, with spectra harmonized into a common format. Four quantitative methodologies were evaluated to address the strongly skewed distribution of some biomarkers. Partial least squares regression was used as the reference basis, and compared with a random modification of distribution associated with PLS (random-downsampling-PLS), an optimized modification of distribution associated with PLS (KennardStone-downsampling-PLS), and support vector machine (SVM). When the ability of MIR to predict biomarkers was too low for quantification, different qualitative methodologies were tested to discriminate low versus high values of biomarkers. For each biomarker, 20% of the herds were randomly removed within all countries to be used as the validation dataset. The remaining 80% of herds were used as the calibration dataset. In calibration, the 3 alternative methodologies outperform the PLS performances for the majority of biomarkers. However, in the external herd validation, PLS provided the best results for isocitrate, glucose-6P, free glucose, and lactate dehydrogenase (coefficient of determination in external herd validation [R2v] = 0.48, 0.58, 0.28, and 0.24, respectively). For other molecules, PLS-random-downsampling and PLS-KennardStone-downsampling outperformed PLS in the majority of cases, but the best results were provided by SVM for citrate, BHB, acetone, NAGase, and progesterone (R2v = 0.94, 0.58, 0.76, 0.68, and 0.15, respectively). Hence, PLS and SVM based on the entire dataset provided the best results for normal and skewed distributions, respectively. Complementary to the quantitative methods, the qualitative discriminant models enabled the discrimination of high and low values for BHB, acetone, and NAGase with a global accuracy around 90%, and glucose-6P with an accuracy of 83%. In conclusion, MIR spectra of milk can enable quantitative screening of citrate as a biomarker of energy deficit and discrimination of low and high values of BHB, acetone, and NAGase, as biomarkers of ketosis and mastitis. Finally, progesterone could not be predicted with sufficient accuracy from milk MIR spectra to be further considered. Consequently, MIR spectrometry can bring valuable information regarding the occurrence of energy deficit, ketosis, and mastitis in dairy cows, which in turn have major influences on their fertility and survival.
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Affiliation(s)
- C Grelet
- Walloon Agricultural Research Center (CRA-W), Gembloux, Belgium, 5030
| | - T Larsen
- Department of Animal and Veterinary Sciences, Aarhus University, Tjele, Denmark, DK-8830
| | - M A Crowe
- University College Dublin (UCD), Dublin, Ireland, D04 C1P1
| | - D C Wathes
- Royal Veterinary College (RVC), London, United Kingdom, CM24 1RW
| | - C P Ferris
- Agri-Food and Biosciences Institute (AFBI), Belfast, Northern Ireland, BT9 5PX
| | - K L Ingvartsen
- Department of Animal and Veterinary Sciences, Aarhus University, Tjele, Denmark, DK-8830
| | - C Marchitelli
- Research Center for Animal Production and Aquaculture (CREA), Roma, Italy, 00184
| | - F Becker
- Leibniz Institute for Farm Animal Biology (FBN), Dummerstorf, Germany, 18196
| | - A Vanlierde
- Walloon Agricultural Research Center (CRA-W), Gembloux, Belgium, 5030
| | - J Leblois
- EEIG European Milk Recording (EMR), Ciney, Belgium, 5590
| | | | - F J Auer
- LKV-Austria, Vienna, Austria, A-1200
| | - A Köck
- ZuchtData, Vienna, Austria, A-1200
| | - L Dale
- LKV Baden Württemberg, Stuttgart, Germany, D-70190
| | - J Sölkner
- University of Natural Resources and Life Sciences, Vienna, Austria, A-1180
| | - O Christophe
- Walloon Agricultural Research Center (CRA-W), Gembloux, Belgium, 5030
| | - J Hummel
- University of Göttingen, Göttingen, Germany, D-37075
| | - A Mensching
- University of Göttingen, Göttingen, Germany, D-37075
| | | | - H Soyeurt
- University of Liège, Gembloux Agro-Bio Tech (Ulg-GxABT), Gembloux, Belgium, 5030
| | - M Calmels
- Seenovia, Saint Berthevin, France, 53940
| | - R Reding
- Convis, Ettelbruck, Luxembourg, 9085
| | - M Gelé
- Idele, Paris, France, 75012
| | - Y Chen
- University of Liège, Gembloux Agro-Bio Tech (Ulg-GxABT), Gembloux, Belgium, 5030
| | - N Gengler
- University of Liège, Gembloux Agro-Bio Tech (Ulg-GxABT), Gembloux, Belgium, 5030
| | - F Dehareng
- Walloon Agricultural Research Center (CRA-W), Gembloux, Belgium, 5030.
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Becker F, Trebicka J, Houben P, Pascher A. [Transplantation for acute-on-chronic liver failure]. Chirurgie (Heidelb) 2024; 95:115-121. [PMID: 37978073 DOI: 10.1007/s00104-023-01992-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/23/2023] [Indexed: 11/19/2023]
Abstract
A review and discussion of the current literature on liver transplantation for acute-on-chronic liver failure (ACLF) was performed. The ACLF represents an acute deterioration of liver function with pre-existing liver disease and is associated with increasing multiorgan failure, depending on the stage. The 28-day mortality ranges to well over 70% in stage 3 and requires rapid intensive medical treatment involving an interdisciplinary team experienced in transplantation medicine. Under optimized conditions, liver transplantation provides long-term survival rates comparable to other indications. Achieving this requires a differentiated donor selection, choosing the appropriate time for transplantation in the context of a dynamic disease course and the use of appropriate surgical techniques.
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Affiliation(s)
- F Becker
- Klinik für Allgemein‑, Viszeral- und Transplantationschirurgie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, 48149, Münster, Deutschland
| | - J Trebicka
- Medizinische Klinik B, Gastroenterologie, Hepatologie, Endokrinologie, Klinische Infektiologie, Universitätsklinikum Münster, Münster, Deutschland, Albert-Schweitzer-Campus 1, 48149
| | - P Houben
- Klinik für Allgemein‑, Viszeral- und Transplantationschirurgie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, 48149, Münster, Deutschland
| | - A Pascher
- Klinik für Allgemein‑, Viszeral- und Transplantationschirurgie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, 48149, Münster, Deutschland.
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Ferrari P, Becker F, Campani L, Jansen J, Jovanović Z, Krstić D, Mariotti F, Teles P, Venturi G. ON THE PLACEMENT OF APRON DOSEMETERS AND DOSE ASSESSMENT IN INTERVENTIONAL CARDIOLOGY PROCEDURES: PRELIMINARY RESULTS. Radiat Prot Dosimetry 2022; 198:1495-1499. [PMID: 36156106 DOI: 10.1093/rpd/ncac188] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 08/23/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
Personnel involved in interventional practices are likely to be exposed to higher radiation doses than other workers in the medical field. Personnel monitoring and radiation protection measures play a crucial role in keeping these doses below the limits. EURADOS (European Radiation Dosimetry Group) Working Group 12 performed a series of investigations showing how the complexity of the scattered field reaching the operators can influence the doses to the operators. The present work was aimed at determining the possible effects on the registered doses of the scattered field and the actual position of a dosemeter on apron. This study has been performed through Monte Carlo simulations and it was validated through measurements. It does not claim to identify the 'best' position for the dosemeter, but to assess the variability of its response, showing how a variability of the order of +/- 30% to 40 should be taken into account.
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Affiliation(s)
- P Ferrari
- ENEA, IRP - Radiation Protection Institute, Bologna (BO), Italy
| | - F Becker
- KIT, Institute for Nuclear Waste Disposal, Eggenstein-Leopoldshafen, Germany
| | - L Campani
- ENEA, IRP - Radiation Protection Institute, Bologna (BO), Italy
| | - J Jansen
- UKHSA, Radiation, Chemical and Environmental Hazards, Chilton, UK
| | - Z Jovanović
- Faculty of Science, University of Kragujevac, Kragujevac, Serbia
| | - D Krstić
- Faculty of Science, University of Kragujevac, Kragujevac, Serbia
| | - F Mariotti
- ENEA, IRP - Radiation Protection Institute, Bologna (BO), Italy
| | - P Teles
- Faculty of Science, Physics and Astronomy Department, Universidade do Porto, Porto, Portugal
| | - G Venturi
- Medical Physics Department, Ravenna & Forlì Hospitals AUSL Romagna, Forlì (FC), Italy
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Becker F. Using Fluorescence Cross Correlation Spectroscopy to Monitor and Quantify Drug Target Occupancy in Cells, Tissues and Patient Biopsies. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01069-3] [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: 11/26/2022]
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Becker F, Marcantonio F, Datta S, Wichterich C, Cizmas L, Surber J, Kennedy K, Bowles E. Tracking the source of contaminant lead in children's blood. Environ Res 2022; 212:113307. [PMID: 35447155 DOI: 10.1016/j.envres.2022.113307] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 04/09/2022] [Accepted: 04/10/2022] [Indexed: 06/14/2023]
Abstract
Pb isotope ratios are used for apportioning the sources of Pb in the blood of children (ages 1-6) screened for high blood Pb levels (>5 μg/dL) surrounding urban areas of Kansas City, MO. We compared Pb isotope ratios measured in the child's blood with those of the most likely sources of Pb in that child's home environment. The environmental sources sampled consisted of topsoils, paints, occupational sources (e.g., oil rig workers' uniforms, mechanics' clothes), indoor air filters, dusts, and dietary sources (e.g., spices). Blood lead levels (BLL) ranged from 2.9 to 12.7 μg/dL in children from the five homes participating in this study. Measurements of 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb isotope ratios were made by multi-collector ICP-MS. Comparison of the Pb isotope ratios in home environment samples versus those in the child's blood in each home allowed the identification of possible sources of a child's Pb exposure in three homes. In five homes investigated, children's blood Pb levels were most likely to be derived from dusts inside, and topsoil outside, the homes, or a mixture thereof. In one case, blood Pb was derived from turmeric spice and, in another, the Pb was derived from paint. It is not always possible to directly link high BLLs to the environmental sources collected when Pb isotope ratios of the environmental samples did not overlap with those of the blood.
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Affiliation(s)
- F Becker
- Department of Geology and Geophysics, Texas A&M University, College Station, TX, USA
| | - F Marcantonio
- Department of Geology and Geophysics, Texas A&M University, College Station, TX, USA.
| | - S Datta
- Department of Earth and Planetary Sciences, University of Texas, San Antonio, TX, USA
| | - C Wichterich
- Department of Geology and Geophysics, Texas A&M University, College Station, TX, USA
| | - L Cizmas
- School of Public Health, Texas A&M University, College Station, TX, USA
| | - J Surber
- Department of Geology, Kansas State University, Manhattan, KS, USA
| | - K Kennedy
- Children's Mercy Kansas City Environmental Health Program, Kansas City, MO, USA
| | - E Bowles
- Children's Mercy Kansas City Environmental Health Program, Kansas City, MO, USA
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Kennedy KM, Becker F, Hammon HM, Kuhla B. Differences in net fat oxidation, heat production, and liver mitochondrial DNA copy numbers between high and low feed-efficient dairy cows. J Dairy Sci 2021; 104:9287-9303. [PMID: 33934856 DOI: 10.3168/jds.2020-20031] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 03/18/2021] [Indexed: 11/19/2022]
Abstract
Improving feed utilization efficiency in dairy cattle could have positive economic and environmental effects that would support the sustainability of the dairy industry. Identifying key differences in metabolism between high and low feed-efficient animals is vital to enhancing feed conversion efficiency. Therefore, our objectives were (1) to determine whether cows grouped by either high or low feed efficiency have measurable differences in net fat and carbohydrate metabolism that account for differences in heat production (HP), and if so, whether these differences also exists under conditions of feed withdrawal when the effect of feeding on HP is minimized, and (2) to determine whether the abundance of mitochondria in the liver can be related to the high or low feed-efficient groups. Ten dairy cows from a herd of 15 (parity = 2) were retrospectively grouped into either a high (H) or a low (L) feed-efficient group (n = 5 per group) based on weekly energy-corrected milk (ECM) divided by dry mater intake (DMI) from wk 4 through 30 of lactation. Livers were biopsied at wk -4, 2, and 12, and blood was sampled weekly from wk -3 to 12 relative to parturition. Blood was subset to be analyzed for the transition period (wk -3 to 3) and from wk 4 to 12. In wk 5.70 ± 0.82 (mean ± SD) postpartum (PP), cows spent 2 d in respiration chambers (RC), in which CO2, O2, and CH4 gases were measured every 6 min for 24 h. Fatty acid oxidation (FOX), carbohydrate oxidation (COX), metabolic respiratory quotient (RQ), and HP were calculated from gas measurements for 23 h. Cows were fed ad libitum (AD-LIB) on d 1 and had feed withdrawn (RES, restricted diet) on d 2. Additional blood samples were taken at the end of the AD-LIB and RES feeding periods in the RC. During wk 4 to 30 PP, H had greater DMI/kg of metabolic body weight (BW0.75), ECM per kilogram of BW0.75 yield, and ECM/DMI ratio, compared with L, but a lower body condition score between wk 4 and 12 PP. In the RC period, we detected no differences in BW, DMI, or milk yield between groups. We also detected no significant group or group by feeding period interactions for plasma metabolites except for Revised Quantitative Insulin Sensitivity Check Index, which tended to have a group by feeding period interaction. The H group had lower HP and HP per kilogram of BW0.75 compared with L. Additionally, H had lower FOX and FOX per kilogram of BW0.75 compared with L during the AD-LIB period. Methane, CH4 per kilogram of BW0.75, and CH4 per kilogram of milk yield were lower in H compared with L, but, when adjusted for DMI, CH4/DMI did not differ between groups, nor did HP/DMI. Relative mitochondrial DNA copy numbers in the liver were lower in the L than in the H group. These results suggest that lower feed efficiency in dairy cows may result from fewer mitochondria per liver cell as well as a greater whole-body HP, which likely partially results from higher net fat oxidation.
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Affiliation(s)
- K M Kennedy
- Institute for Farm Animal Biology (FBN), Institute of Nutritional Physiology "Oskar Kellner," Dummerstorf 18196, Germany
| | - F Becker
- Institute for Farm Animal Biology (FBN), Institute of Reproductive Biology, Dummerstorf 18196, Germany
| | - H M Hammon
- Institute for Farm Animal Biology (FBN), Institute of Reproductive Biology, Dummerstorf 18196, Germany
| | - B Kuhla
- Institute for Farm Animal Biology (FBN), Institute of Nutritional Physiology "Oskar Kellner," Dummerstorf 18196, Germany.
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Wathes DC, Cheng Z, Salavati M, Buggiotti L, Takeda H, Tang L, Becker F, Ingvartsen KL, Ferris C, Hostens M, Crowe MA. Corrigendum to "Relationships between metabolic profiles and gene expression in liver and leukocytes of dairy cows in early lactation" (J. Dairy Sci. 104:3596-3616). J Dairy Sci 2021; 104:6327. [PMID: 33888222 DOI: 10.3168/jds.2021-104-5-6327] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Wathes DC, Cheng Z, Salavati M, Buggiotti L, Takeda H, Tang L, Becker F, Ingvartsen KI, Ferris C, Hostens M, Crowe MA. Relationships between metabolic profiles and gene expression in liver and leukocytes of dairy cows in early lactation. J Dairy Sci 2021; 104:3596-3616. [PMID: 33455774 DOI: 10.3168/jds.2020-19165] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 10/11/2020] [Indexed: 12/13/2022]
Abstract
Homeorhetic mechanisms assist dairy cows in the transition from pregnancy to lactation. Less successful cows develop severe negative energy balance (NEB), placing them at risk of metabolic and infectious diseases and reduced fertility. We have previously placed multiparous Holstein Friesian cows from 4 herds into metabolic clusters, using as biomarkers measurements of plasma nonesterified fatty acids, β-hydroxybutyrate, glucose and IGF-1 collected at 14 and 35 d in milk (DIM). This study characterized the global transcriptomic profiles of liver and circulating leukocytes from the same animals to determine underlying mechanisms associated with their metabolic and immune function. Liver biopsy and whole-blood samples were collected around 14 DIM for RNA sequencing. All cows with available RNA sequencing data were placed into balanced (BAL, n = 44), intermediate (n = 44), or imbalanced (IMBAL, n = 19) metabolic cluster groups. Differential gene expression was compared between the 3 groups using ANOVA, but only the comparison between BAL and IMBAL cows is reported. Pathway analysis was undertaken using DAVID Bioinformatic Resources (https://david.ncifcrf.gov/). Milk yields did not differ between BAL and IMBAL cows but dry matter intake was less in IMBAL cows and they were in greater energy deficit at 14 DIM (-4.48 v -11.70 MJ/d for BAL and IMBAL cows). Significantly differentially expressed pathways in hepatic tissue included AMPK signaling, glucagon signaling, adipocytokine signaling, and insulin resistance. Genes involved in lipid metabolism and cholesterol transport were more highly expressed in IMBAL cows but IGF1 and IGFALS were downregulated. Leukocytes from BAL cows had greater expression of histones and genes involved in nucleosomes and cell division. Leukocyte expression of heat shock proteins increased in IMBAL cows, suggesting an unfolded protein response, and several key genes involved in immune responses to pathogens were upregulated (e.g., DEFB13, HP, OAS1Z, PTX3, and TLR4). Differentially expressed genes upregulated in IMBAL cows in both tissues included CD36, CPT1, KFL11, and PDK4, all central regulators of energy metabolism. The IMBAL cows therefore had greater difficulty maintaining glucose homeostasis and had dysregulated hepatic lipid metabolism. Their energy deficit was associated with a reduced capacity for cell division and greater evidence of stress responses in the leukocyte population, likely contributing to an increased risk of infectious disease.
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Affiliation(s)
- D C Wathes
- Royal Veterinary College, Hatfield, AL9 7TA Hertfordshire, United Kingdom.
| | - Z Cheng
- Royal Veterinary College, Hatfield, AL9 7TA Hertfordshire, United Kingdom
| | - M Salavati
- Royal Veterinary College, Hatfield, AL9 7TA Hertfordshire, United Kingdom
| | - L Buggiotti
- Royal Veterinary College, Hatfield, AL9 7TA Hertfordshire, United Kingdom
| | - H Takeda
- Unit of Animal Genomics, GIGA Institute, University of Liège, B-4000 Liège, Belgium
| | - L Tang
- Unit of Animal Genomics, GIGA Institute, University of Liège, B-4000 Liège, Belgium
| | - F Becker
- Leibniz Institute for Farm Animal Biology, 18196 Dummerstorf, Germany
| | - K I Ingvartsen
- Department of Animal Science, Aarhus University, DK-8830 Tjele, Denmark
| | - C Ferris
- Agri-Food and Biosciences Institute, Belfast BT9 5PX, United Kingdom
| | - M Hostens
- Department of Reproduction, Obstetrics and Herd Health, Ghent University, B-9820 Merelbeke, Belgium
| | - M A Crowe
- School of Veterinary Medicine, University College Dublin, Dublin 4, Ireland
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Abstract
Machine perfusion will become established as the standard of care for solid organ transplantation in the near future. Ongoing studies are investigating the appropriate perfusion algorithms for each specific organ. Although it is neither proven which perfusion principle nor type of device is superior, it has already been sufficiently shown that the increasing number of marginal organs that are currently transplanted in Germany would benefit from machine perfusion for conditioning before transplantation. The addition of hypothermic and normothermic perfusion sequences opens up the possibility of conditioning of previously damaged organs as well as viability testing. Overall, machine perfusion increases the safety for the recipient and can counteract the increasingly more difficult scenario of working hour restrictions because solid organ transplantations in the future will be plannable and carried out during the day.
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Affiliation(s)
- F Becker
- Klinik für Allgemein‑, Viszeral- und Transplantationschirurgie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude W1, 48149, Münster, Deutschland
| | - A Pascher
- Klinik für Allgemein‑, Viszeral- und Transplantationschirurgie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude W1, 48149, Münster, Deutschland
| | - J G Brockmann
- Klinik für Allgemein‑, Viszeral- und Transplantationschirurgie, Universitätsklinikum Münster, Albert-Schweitzer-Campus 1, Gebäude W1, 48149, Münster, Deutschland.
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Becker F, Köhnke D, Reichardt M, Budelmann H. Investigation of various concrete compositions with respect to gamma-radiation transmission properties of Cs-137. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108679] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ferrari P, Becker F, Jovanovic Z, Khan S, Bakhanova E, Principi S, Kristic D, Pierotti L, Mariotti F, Faj D, Turk T, Nikezic D, Bertolini M. Simulation of H p (10) and effective dose received by the medical staff in interventional radiology procedures. J Radiol Prot 2019; 39:809-824. [PMID: 31234160 DOI: 10.1088/1361-6498/ab2c42] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Interventional radiology and cardiology are widespread employed techniques for diagnosis and treatment of several pathologies because they avoid the majority of the side-effects associated with surgical treatments, but are known to increase the radiation exposure to patient and operators. In recent years many studies treated the exposure of the operators performing cardiological procedures. The aim of this work is to study the exposure condition of the medical staff in some selected interventional radiology procedures. The Monte Carlo simulations have been employed with anthropomorphic mathematical phantoms reproducing the irradiation scenario of the medical staff with two operators and the patient. A personal dosemeter, put on apron, was modelled for comparison with measurements performed in hospitals, done with electronic dosemeters, in a reduced number of interventional radiology practices. Within the limits associated to the use of numerical anthropomorphic models to mimic a complex interventional procedure, the personal dose equivalent, H p (10), was evaluated and normalised to the simulated Kerma-Area Product, KAP, value, indeed the effective dose has been calculated. The H p (10)/KAPvalue of the first operator is about 10 μSv/Gy.cm2, when ceiling shielding is not used. This value is calculated on the trunk and it varies of +/-30% moving the dosemeter to the waist or to the neck. The effective dose, normalised to the KAP value, varies between 0.03 and 0.4 μSv/Gy.cm2. Considering all the unavoidable approximation of this kind of investigations, the comparisons with hospital measurement and literature data showed a good agreement allowing to use of the present results for dosimetric characterisation of interventional radiology procedures.
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Affiliation(s)
- P Ferrari
- ENEA-IRP, Radiation Protection Institute, 4 Via Martiri di Monte Sole, 40129 Bologna, Italy
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Suárez HS, Becker F, Klix A, Pang B, Döring T. Neutron flux measurements on a mock-up of a storage cask for high-level nuclear waste using 2.5 MeV neutrons. J Radiol Prot 2018; 38:881-891. [PMID: 29878896 DOI: 10.1088/1361-6498/aac574] [Citation(s) in RCA: 1] [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: 06/08/2023]
Abstract
To store and dispose spent nuclear fuel, shielding casks are employed to reduce the emitted radiation. To evaluate the exposure of employees handling such casks, Monte Carlo radiation transport codes can be employed. Nevertheless, to assess the reliability of these codes and nuclear data, experimental checks are required. In this study, a neutron generator (NG) producing neutrons of 2.5 MeV was employed to simulate neutrons produced in spent nuclear fuel. Different configurations of shielding layers of steel and polyethylene were positioned between the target of the NG and a NE-213 detector. The results of the measurements of neutron and γ radiation and the corresponding simulations with the code MCNP6 are presented. Details of the experimental set-up as well as neutron and photon flux spectra are provided as reference points for such NG investigations with shielding structures.
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Affiliation(s)
- H Saurí Suárez
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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Affiliation(s)
| | | | | | - H. Torner
- Department of Reproductive Biology Research Institute for the Biology of Farm Animals, 18196 Dummerstorf, Germany
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14
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Laroche JP, Becker F, Schved JF. [Direct oral anticoagulants (DOACS): A necessary focus]. J Med Vasc 2018; 43:198-205. [PMID: 29754730 DOI: 10.1016/j.jdmv.2018.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 02/24/2018] [Indexed: 06/08/2023]
Abstract
In 2008, we decided to enter the era of direct oral anticoagulants (DOACS). Was that the right decision to make? The answer will depend on how well we meet the conditions of proper use. This means avoiding underdosing and overdosing as well as understanding how DOACS were validated so that our prescriptions fulfill their role in the management of thrombotic disease.
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Affiliation(s)
- J P Laroche
- Service de médecine vasculaire, hôpital Saint-Éloi, CHU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France; Médecine vasculaire, médipôle, 1139, chemin du Lavarin, 84000 Avignon, France.
| | - F Becker
- Médecin vasculaire, 40, chemin des Favrands, 74400 Chamonix-Mont-Blanc, France
| | - J F Schved
- Département d'hématologie biologique, hôpital Saint-Éloi, CHU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France
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15
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Laroche JP, Blaise S, Becker F, Laaeng Massoni C, Nou-Howaldt M, Pichot O, Desmurs-Clavel H, Jeancolas J, Jurus C, Sarlon-Bartoli G, Soulier-Sotto V, Thiel H, Sevestre-Pietri MA, Maloizel-Delaunay J, Mestre-Godin S. [Quality standards for ultrasonographic assessment of peripheral vascular malformations and vascular tumors. Report of the french society for vascular medicine. 2018 Update]. J Med Vasc 2018; 43:36-51. [PMID: 29425539 DOI: 10.1016/j.jdmv.2017.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 11/02/2017] [Indexed: 06/08/2023]
Abstract
UNLABELLED The quality standards of the French Society of Vascular Medicine for the ultrasonographic assessment of vascular malformations are based on the two following requirements: (1) technical know-how: mastering the use of ultrasound devices and the method of examination; (2) medical know-how: ability to adapt the methods and scope of the examination to its clinical indication and purpose, and to rationally analyze and interpret its results. AIMS OF THE QUALITY STANDARDS To describe an optimal method of examination in relation to the clinical question and hypothesis. To homogenize practice, methods, glossary, and reporting. To provide good practice reference points, and promote a quality process. ITEMS OF THE QUALITY STANDARDS The 3 levels of examination; their clinical indications and goals. The reference standard examination (level 2), its variants according to clinical needs. The minimal content of the examination report; the letter to the referring physician (synthesis, conclusion and proposal for further investigation and/or therapeutic management). Commented glossary (anatomy, hemodynamics, semiology). Technical bases. Setting and use of ultrasound devices. Here, we discuss ultrasonography methods of using of ultrasonography for the assessment of peripheral vascular malformations and tumors (limbs, face, trunk).
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MESH Headings
- Adult
- Blood Coagulation Disorders/blood
- Blood Coagulation Disorders/etiology
- Blood Flow Velocity
- Clinical Competence
- Disease Progression
- Eye Neoplasms/diagnostic imaging
- Female
- Fibrin Fibrinogen Degradation Products/analysis
- Fibrinogen/analysis
- Hemangioma/diagnostic imaging
- Hemodynamics
- Humans
- Infant
- Lymphangioma, Cystic/diagnostic imaging
- Male
- Quality Assurance, Health Care
- Ultrasonography, Doppler, Color/instrumentation
- Ultrasonography, Doppler, Color/methods
- Ultrasonography, Doppler, Duplex/instrumentation
- Ultrasonography, Doppler, Duplex/methods
- Ultrasonography, Doppler, Duplex/standards
- Vascular Malformations/blood
- Vascular Malformations/classification
- Vascular Malformations/complications
- Vascular Malformations/diagnostic imaging
- Vascular Neoplasms/diagnostic imaging
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Affiliation(s)
- J P Laroche
- Médecine vasculaire, médecine interne B, hôpital Saint-Eloi, CHU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France
| | - S Blaise
- Département de médecine vasculaire, CHU Grenoble Alpes, 38000 Grenoble, France.
| | - F Becker
- Service d'angiologie et d'hémostase, hôpitaux universitaires de Genève, hôpital Cantonal, 1205 Genève, Suisse
| | | | - M Nou-Howaldt
- Médecine vasculaire, médecine interne B, hôpital Saint-Eloi, CHU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France
| | - O Pichot
- Département de médecine vasculaire, CHU Grenoble Alpes, 38000 Grenoble, France
| | - H Desmurs-Clavel
- Hospices civils de Lyon, service de médecine interne, hôpital Édouard-Herriot, 5, rue d'Arsonval, 69437 Lyon, France
| | - J Jeancolas
- Médecine vasculaire, CHU Caen, avenue de la Côte de Nacre, 14033 Caen, France
| | - C Jurus
- Médecine vasculaire, clinique du Tonkin, 26, rue du Tonkin, 69100 Villeurbanne, France
| | - G Sarlon-Bartoli
- Médecine vasculaire, CHU La Timone, 264, rue Saint-Pierre, 13005 Marseille, France
| | - V Soulier-Sotto
- Médecine vasculaire, médecine interne B, hôpital Saint-Eloi, CHU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France
| | - H Thiel
- Médecine vasculaire, CHU Clermont-Ferrand, hôpital Gabriel-Montpied, 58, rue Montalembert, 63003 Clermont-Ferrand, France
| | - M A Sevestre-Pietri
- Médecine vasculaire, Site Sud, CHU d'Amiens-Picardie, 80054 Amiens cedex 1, France
| | - J Maloizel-Delaunay
- Médecine vasculaire, CHU Rangueil, 1, avenue du Professeur Jean-Poulhès, TSA 50032, 31059 Toulouse cedex 9, France
| | - S Mestre-Godin
- Département de médecine vasculaire, CHU Grenoble Alpes, 38000 Grenoble, France
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16
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Tempel G, Becker F. Zahngesundheit und Sozialstatus – Ergebnisse einer schulzahnärztlichen Untersuchung Bremer Erstklässler. Gesundheitswesen 2017. [DOI: 10.1055/s-0037-1601970] [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] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Teles P, Nikodemová D, Bakhanova E, Becker F, Kneževic Ž, Pereira MF, Sarmento S. A Review of Radiation Protection Requirements and Dose Estimation for Staff and Patients in CT Fluoroscopy. Radiat Prot Dosimetry 2017; 174:518-534. [PMID: 27522054 DOI: 10.1093/rpd/ncw231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 07/06/2016] [Indexed: 06/06/2023]
Abstract
The combination of fluoroscopically guided interventional procedures with computed tomography (CTF) has become widespread around the world. The benefits of CTF include the ability to obtain a real-time visualization of the entire body, increased target accuracy and improved visualization of biopsy needles. Modern CTF units work with variable frame rates for image selection, and therefore the dose distributions for patients and staff can considerably vary, creating growing concern in terms of the occupational exposure of interventionists and the drawback of a higher exposure of the patient. A literature review of the latest CTF publications is summarized in this article. A wide range of CTF studies reveal different treatment methods used in clinical practice, and therefore the differences in the exposures between them; as well as in the radiation protection tools and dose monitoring. Further optimization of radiation protection methods, harmonization of exposure patterns as well as training and education of CTF staff on the basis of the information in the survey, are strongly recommended.
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Affiliation(s)
- P Teles
- Grupo de Proteção e Segurança Radiológica, Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Pólo de Loures. Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - D Nikodemová
- Slovak Medical University, Limbová 14, 83301 Bratislava, Slovakia
| | - E Bakhanova
- National Research Center for Radiation Medicine, NAMS Ukraine, Melnikova 53, Kiev 04050, Ukraine
| | - F Becker
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Ž Kneževic
- Ruder Boškovic Institute, Bijenicka 54, 10000 Zagreb, Croatia
| | - M F Pereira
- Grupo de Proteção e Segurança Radiológica, Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Pólo de Loures. Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
- Laboratório de Proteção e Segurança Radiológica (LPSR), Instituto Superior Técnico, Universidade de Lisboa, Pólo de Loures. Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - S Sarmento
- Medical Physics, Radiobiology and Radiation Protection Group, IPO Porto Research Center (CI-IPOP), Portuguese Oncology Institute of Porto (IPO Porto), Porto, Portugal
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18
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Diard A, Becker F, Pichot O. [Quality standards for duplex ultrasonographic assessment (duplex us) of abdominal aortic stent grafts]. J Med Vasc 2017; 42:170-184. [PMID: 28705406 DOI: 10.1016/j.jdmv.2017.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 02/28/2017] [Indexed: 10/19/2022]
Abstract
The quality standards of the French Society of Vascular Medicine for the ultrasound assessment of lower limb arteries in vascular medicine practice are based on the principle that these examinations have to meet two requirements: technical know-how (knowledge of devices and methodologies); medical know-how (level of examination matching the indication and purpose of the examination, interpretation and critical analysis of results). OBJECTIVES OF THE QUALITY STANDARDS To describe an optimal level of examination adjusted to the indication or clinical hypothesis; to establish harmonious practices, methodologies, terminologies, results description and report; to provide good practice reference points and to promote a high quality process. THEMES OF THE QUALITY STANDARDS The three levels of examination, indications and objectives for each level; the reference standard examination (level 2) and its variants according to indications; the minimal content of the exam report, the medical conclusion letter to the corresponding physician (synthesis, conclusion and management suggestions); commented glossary (anatomy, hemodynamics, signs and symptoms); technical basis; device settings. Here, we discuss duplex ultrasound for the supervision of the aortic stent grafts.
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Affiliation(s)
- A Diard
- 25, route de Créon, 33550 Langoiran, France.
| | - F Becker
- Service d'angiologie et d'hémostase, hôpitaux universitaires de Genève, hôpital Cantonal, 1211 Genève, France
| | - O Pichot
- 7, rue Lesdiguières, 38000 Grenoble, France
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19
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Becker F, Bontemps C, Wasser C, Bentafat S, Dalon M, Dell V, Ladent N, Pecquet M, Pohier. P. Évaluation de l’impact d’une séance brève d’échauffements à la prise de poste sur les plaintes concernant l’appareil locomoteur. ARCH MAL PROF ENVIRO 2016. [DOI: 10.1016/j.admp.2016.10.017] [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: 10/20/2022]
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20
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Becker F, Hannus S, Hansen K, Landesman Y, Crochiere M. Application of fluorescence correlation spectroscopy as a novel tool to quantify target occupancy in cells and tumor tissue. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32836-2] [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: 11/27/2022]
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21
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Burg MC, Lunkenheimer P, Niederer P, Brune C, Redmann K, Smerup M, Spiegel U, Becker F, Maintz D, Heindel W, Anderson RH. Pneumatic Distension of Ventricular Mural Architecture Validated Histologically. ROFO-FORTSCHR RONTG 2016; 188:1045-1053. [PMID: 27760439 DOI: 10.1055/s-0042-115569] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Purpose: There are ongoing arguments as to how cardiomyocytes are aggregated together within the ventricular walls. We used pneumatic distension through the coronary arteries to exaggerate the gaps between the aggregated cardiomyocytes, analyzing the pattern revealed using computed tomography, and validating our findings by histology. Methods: We distended 10 porcine hearts, arresting 4 in diastole by infusion of cardioplegic solutions, and 4 in systole by injection of barium chloride. Mural architecture was revealed by computed tomography, measuring also the angulations of the long chains of cardiomyocytes. We prepared the remaining 2 hearts for histology by perfusion with formaldehyde. Results: Increasing pressures of pneumatic distension elongated the ventricular walls, but produced insignificant changes in mural thickness. The distension exaggerated the spaces between the aggregated cardiomyocytes, compartmenting the walls into epicardial, central, and endocardial regions, with a feathered arrangement of transitions between them. Marked variation was noted in the thicknesses of the parts in the different ventricular segments, with no visible anatomical boundaries between them. Measurements of angulations revealed intruding and extruding populations of cardiomyocytes that deviated from a surface-parallel alignment. Scrolling through the stacks of tomographic images revealed marked spiraling of the aggregated cardiomyocytes when traced from base to apex. Conclusion: Our findings call into question the current assumption that cardiomyocytes are uniformly aggregated together in a tangential fashion. There is marked heterogeneity in the architecture of the different ventricular segments, with the aggregated units never extending in a fully transmural fashion. Key Points: • Pneumographic computed tomography reveals an organized structure of the ventricular walls.• Aggregated cardiomyocytes form a structured continuum, with marked regional heterogeneity.• Global ventricular function results from antagonistic forces generated by aggregated cardiomyocytes. Citation Format: • Burg MC, Lunkenheimer P, Niederer P et al. Pneumatic Distension of Ventricular Mural Architecture Validated Histologically. Fortschr Röntgenstr 2016; 188: 1045 - 1053.
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Affiliation(s)
- M C Burg
- Department of Clinical Radiology, University Hospital Münster, Germany
| | - P Lunkenheimer
- Dept. of Experimental Thoraco-vascular Surgery, University Hospital Münster, Germany
| | - P Niederer
- Institute for Biomedical Engineering, ETH and University of Zürich, Switzerland
| | - C Brune
- Department of Applied Mathematics, University of Twente, Netherlands
| | - K Redmann
- Center for Reproductive Medicine and Andrology, University Hospital Münster, Germany
| | - M Smerup
- Dept of Cardiothoracic and Vascular Surgery, Skejby Sygehus, Aarhus University Hospital, Aarhus, Denmark
| | - U Spiegel
- Dept. Surgical Research, Clinic of General and Visceral Surgery, University Hospital Münster, Germany
| | - F Becker
- Dept. Surgical Research, Clinic of General and Visceral Surgery, University Hospital Münster, Germany
| | - D Maintz
- Department of Clinical Radiology, University Hospital Münster, Germany
| | - W Heindel
- Department of Clinical Radiology, University Hospital Münster, Germany
| | - R H Anderson
- Institute of Genetic Medicine, Newcastle University, London, United Kingdom of Great Britain and Northern Ireland
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22
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White M, Howel D, Moffatt S, Vale L, Haighton C, McColl E, Bryant A, Becker F, Steer M, Lawson S, Aspray T, Milne E. PL03 Does domiciliary welfare rights advice improve health related quality of life in independent-living, socio-economically disadvantaged people aged ≥60 years, recruited via primary care? Randomised controlled trial with embedded economic, qualitative and process evaluations. Br J Soc Med 2016. [DOI: 10.1136/jech-2016-208064.99] [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: 11/04/2022]
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23
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Gyekye PK, Becker F, Mensah SY, Emi-Reynolds G. OPTIMISATION OF SCATTER RADIATION TO STAFF DURING CT-FLUOROSCOPY: MONTE CARLO STUDIES. Radiat Prot Dosimetry 2016; 170:393-397. [PMID: 27247445 DOI: 10.1093/rpd/ncw135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 05/13/2016] [Indexed: 06/05/2023]
Abstract
Studies have shown that there is high radiation exposure to medical staff during computed tomography fluoroscopy (CTF)-guided procedures. This study aims to investigate staff dose reduction techniques considering the CTF gantry positioning in the room and room dimensions in addition to the conventional use of thyroid collars, aprons and eye goggles. A Toshiba Aquilion One 640 slice CT scanner and CTF room were modelled using SimpleGeo. Standing and supine adult mesh phantoms were used to represent the staff and patient. The models were spatially put together on one platform using VOXEL2MCNP. Based on this, MCNPX input files were generated for the studies. CTF gantry and staff positions, and CTF room size were varied for different scenarios. Effective, eye lens and thyroid dose to staff were estimated for each scenario. Additional means of possible dose reduction with respect to positioning of the CTF device and room layout are discussed.
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Affiliation(s)
- P K Gyekye
- Radiation Protection Institute, Ghana Atomic Energy Commission, Accra, Ghana
| | - F Becker
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - S Y Mensah
- College of Agriculture and Natural Sciences, University of Cape Coast, Cape Coast, Ghana
| | - G Emi-Reynolds
- Radiation Protection Institute, Ghana Atomic Energy Commission, Accra, Ghana
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24
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Adams J, Giles EL, Becker F, Ternent L, Sniehotta FF, McColl E. P65 Acceptability of financial incentives for health behaviours in UK adults: a discrete choice experiment. Br J Soc Med 2016. [DOI: 10.1136/jech-2016-208064.164] [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: 11/04/2022]
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25
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Schmid T, Gaede L, Böttcher K, Bräuer G, Fichtner D, Beckmann R, Speck S, Becker F, Truyen U. Efficacy assessment of three inactivated koi herpes virus antigen preparations against experimental challenge virus infection in common carp. J Fish Dis 2016; 39:1007-1013. [PMID: 26765154 DOI: 10.1111/jfd.12428] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 09/30/2015] [Accepted: 09/30/2015] [Indexed: 06/05/2023]
Affiliation(s)
- T Schmid
- Institute of Animal Hygiene and Veterinary Public Health, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - L Gaede
- Institute of Animal Hygiene and Veterinary Public Health, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - K Böttcher
- Animal diseases fund of Saxony, Fish Health Service, Königswartha, Germany
| | - G Bräuer
- Animal diseases fund of Saxony, Fish Health Service, Königswartha, Germany
| | - D Fichtner
- Institute of Infectology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald - Insel Riems, Germany
| | - R Beckmann
- Division Veterinary Medicine, Paul-Ehrlich-Institut, Federal Institute for Vaccines and Biomedicines, Viral Vaccines II, Langen, Germany
| | - S Speck
- Institute of Animal Hygiene and Veterinary Public Health, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - F Becker
- Saxon State Ministry of Social Affairs and Consumer Protection, Dresden, Germany
| | - U Truyen
- Institute of Animal Hygiene and Veterinary Public Health, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
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26
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Junker K, Becker F. [Fifth symposium on renal cell cancer]. Urologe A 2016; 55:972-3. [PMID: 27278375 DOI: 10.1007/s00120-016-0134-1] [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] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- K Junker
- Abteilung für Klinisch-Experimentelle Forschung, Klinik und Poliklinik für Urologie und Kinderurologie, Gebäude 6, 66421, Homburg/Saar, Deutschland.
| | - F Becker
- Urologisches Zentrum am Boxberg, 66538 , Neunkirchen, Deutschland
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27
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Karic T, Røe C, Nordenmark T, Becker F, Sorteberg A. Impact of early mobilization and rehabilitation on global functional outcome one year after aneurysmal subarachnoid hemorrhage. J Rehabil Med 2016; 48:676-682. [DOI: 10.2340/16501977-2121] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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28
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Laroche JP, Becker F, Baud JM, Miserey G, Jaussent A, Picot MC, Bura-Rivière A, Quéré I. [Ultrasound screening of abdominal aortic aneurysm: Lessons from Vesale 2013]. ACTA ACUST UNITED AC 2015; 40:340-9. [PMID: 26371387 DOI: 10.1016/j.jmv.2015.07.104] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 07/10/2015] [Indexed: 01/16/2023]
Abstract
Although aneurysm of the abdominal infra-renal aorta (AAA) meets criteria warranting B mode ultrasound screening, the advantages of mass screening versus selective targeted opportunistic screening remain a subject of debate. In France, the French Society of Vascular Medicine (SFMV) and the Health Authority (HAS) published recommendations for targeted opportunistic screening in 2006 and 2013 respectively. The SFMV held a mainstream communication day on November 21, 2013 in France involving participants from metropolitan France and overseas departments that led to a proposal for free AAA ultrasound screening: the Vesalius operation. Being a consumer operation, the selection criteria were limited to age (men and women between 60 and 75 years); the age limit was lowered to 50 years in case of direct family history of AAA. More than 7000 people (as many women as men) were screened in 83 centers with a 1.70% prevalence of AAA in the age-based target population (3.12% for men, 0.27% for women). The median diameter of detected AAA was 33 mm (range 20 to 74 mm). The prevalence of AAA was 1.7% in this population. Vesalius data are consistent with those of the literature both in terms of prevalence and for cardiovascular risk factors with the important role of smoking. Lessons from Vesalius to take into consideration are: screening is warranted in men 60 years and over, especially smokers, and in female smokers. Screening beyond 75 years should be discussed. Given the importance of screening, the SFMV set up a year of national screening for AAA (Vesalius operation 2014/2015) in order to increase public and physician awareness about AAA detection, therapeutic management, and monitoring. AAA is a serious, common, disease that kills 6000 people each year. The goal of screening is cost-effective reduction in the death toll.
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Affiliation(s)
- J P Laroche
- Médecine interne et médecine vasculaire, hôpital Saint-Éloi, CHRU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France.
| | - F Becker
- 40, chemin des Favrands, 74400 Chamonix-Mont-Blanc, France
| | - J M Baud
- Centre hospitalier de Versailles, 177, rue de Versailles, 78150 Le Chesnay, France
| | - G Miserey
- 55, rue Gambetta, 78120 Rambouillet, France
| | - A Jaussent
- Unité de recherche clinique et épidémiologie, CHRU de Montpellier, 191, avenue du Doyen-Gaston-Giraud, 34090 Montpellier, France
| | - M C Picot
- Unité de recherche clinique et épidémiologie, CHRU de Montpellier, 191, avenue du Doyen-Gaston-Giraud, 34090 Montpellier, France
| | - A Bura-Rivière
- Médecine vasculaire, hôpital Rangueil, CHRU de Toulouse, 1, avenue Jean-Poulhès, TSA 50032, 31059 Toulouse cedex 9, France
| | - I Quéré
- Médecine interne et médecine vasculaire, hôpital Saint-Éloi, CHRU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France
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29
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Alexander JS, Chervenak R, Weinstock-Guttman B, Tsunoda I, Ramanathan M, Martinez N, Omura S, Sato F, Chaitanya GV, Minagar A, McGee J, Jennings MH, Monceaux C, Becker F, Cvek U, Trutschl M, Zivadinov R. Blood circulating microparticle species in relapsing-remitting and secondary progressive multiple sclerosis. A case-control, cross sectional study with conventional MRI and advanced iron content imaging outcomes. J Neurol Sci 2015; 355:84-9. [PMID: 26073484 DOI: 10.1016/j.jns.2015.05.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 05/12/2015] [Accepted: 05/20/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND Although multiple sclerosis (MS) is thought to represent an excessive and inappropriate immune response to several central nervous system (CNS) autoantigens, increasing evidence also suggests that MS may also be a neurovascular inflammatory disease, characterized by endothelial activation and shedding of cell membrane microdomains known as 'microparticles' into the circulation. OBJECTIVE To investigate the relationships between these endothelial biomarkers and MS. METHODS We examined the relative abundance of CD31(+)/PECAM-1, CD51(+)CD61(+) (αV-β3) and CD54(+) (ICAM-1) bearing microparticles in sera of healthy individuals, patients with relapsing-remitting MS, and secondary-progressive MS. We also investigated the correlation among circulating levels of different microparticle species in MS with conventional MRI (T2- and T1-lesion volumes and brain atrophy), as well as novel MR modalities [assessment of iron content on susceptibility-weighted imaging (SWI)-filtered phase]. RESULTS Differences in circulating microparticle levels were found among MS groups, and several microparticle species (CD31(+)/CD51(+)/CD61(+)/CD54(+)) were found to correlate with conventional MRI and SWI features of MS. CONCLUSION These results indicate that circulating microparticles' profiles in MS may support mechanistic roles for microvascular stress and injury which is an underlying contributor not only to MS initiation and progression, but also to pro-inflammatory responses.
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Affiliation(s)
- J S Alexander
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - R Chervenak
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - B Weinstock-Guttman
- The Jacobs Neurological Institute, Department of Neurology, University of Buffalo, Buffalo, NY, USA
| | - I Tsunoda
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - M Ramanathan
- Department of Pharmaceutical Sciences, State University of New York, Buffalo, NY, USA
| | - N Martinez
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - S Omura
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - F Sato
- Department Microbiology & Immunology, Center for Molecular and Tumor Virology, Louisiana State University Health-Shreveport, LA, USA
| | - G V Chaitanya
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - A Minagar
- Department of Neurology, Louisiana State University Health-Shreveport, LA, USA.
| | - J McGee
- Department of Neurology, Louisiana State University Health-Shreveport, LA, USA
| | - M H Jennings
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - C Monceaux
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA
| | - F Becker
- Department of Molecular and Cellular Physiology, Louisiana State University Health-Shreveport, LA, USA; Department for General and Visceral Surgery, Muenster, Germany
| | - U Cvek
- Computer Sciences Department, Louisiana State University-Shreveport, LA, USA
| | - M Trutschl
- Computer Sciences Department, Louisiana State University-Shreveport, LA, USA
| | - R Zivadinov
- The Jacobs Neurological Institute, Department of Neurology, University of Buffalo, Buffalo, NY, USA; Buffalo Neuroimaging Analysis Center, Department of Neurology, University of Buffalo, Buffalo, NY, USA
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Wolking S, Becker F, Rau S, Weber Y, Depondt C, Sisodiya S, Lerche H. P88. Identification of genome-based biomarkers for response to specific antiepileptic drugs in focal and idiopathic generalized epilepsies. Clin Neurophysiol 2015. [DOI: 10.1016/j.clinph.2015.04.238] [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: 10/23/2022]
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Al-Kofahi M, Becker F, Gavins FNE, Woolard MD, Tsunoda I, Wang Y, Ostanin D, Zawieja DC, Muthuchamy M, von der Weid PY, Alexander JS. IL-1β reduces tonic contraction of mesenteric lymphatic muscle cells, with the involvement of cycloxygenase-2 and prostaglandin E2. Br J Pharmacol 2015; 172:4038-51. [PMID: 25989136 DOI: 10.1111/bph.13194] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 04/02/2015] [Accepted: 04/28/2015] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND AND PURPOSE The lymphatic system maintains tissue homeostasis by unidirectional lymph flow, maintained by tonic and phasic contractions within subunits, 'lymphangions'. Here we have studied the effects of the inflammatory cytokine IL-1β on tonic contraction of rat mesenteric lymphatic muscle cells (RMLMC). EXPERIMENTAL APPROACH We measured IL-1β in colon-conditioned media (CM) from acute (AC-CM, dextran sodium sulfate) and chronic (CC-CM, T-cell transfer) colitis-induced mice and corresponding controls (Con-AC/CC-CM). We examined tonic contractility of RMLMC in response to CM, the cytokines h-IL-1β or h-TNF-α (5, 10, 20 ng·mL(-1) ), with or without COX inhibitors [TFAP (10(-5) M), diclofenac (0.2 × 10(-5) M)], PGE2 (10(-5) M)], IL-1-receptor antagonist, Anakinra (5 μg·mL(-1) ), or a selective prostanoid EP4 receptor antagonist, GW627368X (10(-6) and 10(-7) M). KEY RESULTS Tonic contractility of RMLMC was reduced by AC- and CC-CM compared with corresponding control culture media, Con-AC/CC-CM. IL-1β or TNF-α was not found in Con-AC/CC-CM, but detected in AC- and CC-CM. h-IL-1β concentration-dependently decreased RMLMC contractility, whereas h-TNF-α showed no effect. Anakinra blocked h-IL-1β-induced RMLMC relaxation, and with AC-CM, restored contractility to RMLMC. IL-1β increased COX-2 protein and PGE2 production in RMLMC.. PGE2 induced relaxations in RMLMC, comparable to h-IL-1β. Conversely, COX-2 and EP4 receptor inhibition reversed relaxation induced by IL-1β. CONCLUSIONS AND IMPLICATIONS The IL-1β-induced decrease in RMLMC tonic contraction was COX-2 dependent, and mediated by PGE2 . In experimental colitis, IL-1β and tonic lymphatic contractility were causally related, as this cytokine was critical for the relaxation induced by AC-CM and pharmacological blockade of IL-1β restored tonic contraction.
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Affiliation(s)
- M Al-Kofahi
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - F Becker
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA.,Department for General and Visceral Surgery, University Hospital Muenster, Muenster, Germany
| | - F N E Gavins
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - M D Woolard
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - I Tsunoda
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - Y Wang
- Department of Obstetrics and Gynecology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - D Ostanin
- Department of Medicine, Division of Rheumatology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
| | - D C Zawieja
- Department of Medicine, Cardiovascular Research Institute, Texas A&M Health Science Center, College Station, TX, USA
| | - M Muthuchamy
- Department of Medicine, Cardiovascular Research Institute, Texas A&M Health Science Center, College Station, TX, USA
| | - P Y von der Weid
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
| | - J S Alexander
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, LA, USA
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Körbler C, Pfau M, Becker F, Koester U, Werdin F. Die Handtherapie in der Behandlung des CRPS. HANDCHIR MIKROCHIR P 2015; 47:182-9. [DOI: 10.1055/s-0035-1547302] [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] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- C. Körbler
- Abteilung für Physiotherapie und Ergotherapie, Marienhospital Stuttgart, Stuttgart
| | - M. Pfau
- Abteilung für Plastische Chirurgie und Handchirurgie, Diakonieklinkum Stuttgart, Stuttgart
| | - F. Becker
- Abteilung für Plastische Chirurgie und Handchirurgie, Diakonieklinkum Stuttgart, Stuttgart
| | - U. Koester
- Klinik für Anästhesiologie und Operative Intensivmedizin, Spezielle Schmerztherapie, Marienhospital Stuttgart, Stuttgart
| | - F. Werdin
- Abteilung für Plastische Chirurgie und Handchirurgie, Diakonieklinkum Stuttgart, Stuttgart
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Langhammer B, Sällström S, Stanghelle J, Sunnerhagen K, Lundgren-Nilsson Å, Zhang T, Bushnik T, Becker F, Keren O, Banura S, Elessi K, Panchenko M, Du X, Wanying D. A multicenter study on transfer, walking and stair climbing in persons with stroke admitted to specialized rehabilitation. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.3711] [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: 10/23/2022]
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Hallmann K, Zsurka G, Moskau-Hartmann S, Kirschner J, Korinthenberg R, Ruppert AK, Ozdemir O, Weber Y, Becker F, Lerche H, Elger CE, Thiele H, Nurnberg P, Sander T, Kunz WS. A homozygous splice-site mutation in CARS2 is associated with progressive myoclonic epilepsy. Neurology 2014; 83:2183-7. [DOI: 10.1212/wnl.0000000000001055] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Abstract
A continuous method for determining the heats of mixing of liquid systems is described by which the complete mixing curve of a binary system, HM= ƒ(NA) is rapidly obtained by two experiments only, giving 40 or more curve points which are accurate to better than ±1%. Isothermal conditions within +0.002° to ± 0.008° are maintained by means of controlled thermoelectric cooling or heating. The air space above the liquid is completely excluded by operation at constant volume; the pure liquid B enters and the equilibrated mixture leaves the calorimeter vessel with equal velocities. A theoretical discussion of the heat balance equation of this mixing procedure, including the performance curve of the thermoelectric module, the response characteristics of the controller for the Peltier current, and the influence of excess volumes, is given. As examples for the correct operation of the heatof- mixing calorimeter described, the results at 25° for the systems acetone -chloroform, benzyl acetate -chloroform, and pyridine -chloroform are given; they agree with the literature data within the uncertainty limits reported there.
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Affiliation(s)
- F. Becker
- Institut für Physikalische Chemie der Universität des Saarlandes, Saarbrücken
| | - M. Kiefer
- Institut für Physikalische Chemie der Universität des Saarlandes, Saarbrücken
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Locatelli F, Choukroun G, Fliser D, Moecks J, Wiggenhauser A, Gupta A, Swinkels DW, Lin V, Guss C, Pratt R, Carrilho P, Martins AR, Alves M, Mateus A, Gusmao L, Parreira L, Assuncao J, Rodrigues I, Stamopoulos D, Mpakirtzi N, Afentakis N, Grapsa E, Zitt E, Sturm G, Kronenberg F, Neyer U, Knoll F, Lhotta K, Weiss G, Robinson BM, Larkina M, Bieber B, Kleophas W, Li Y, Locatelli F, McCullough K, Nolen JG, Port FK, Pisoni RL, Kalicki RM, Uehlinger DE, Ogawa C, Kanda F, Tomosugi N, Maeda T, Kuji T, Fujikawa T, Shino M, Shibata K, Kaneda T, Nishihara M, Satta H, Kawata SI, Koguchi N, Tamura K, Hirawa N, Toya Y, Umemura S, Chanliau J, Martin H, Stamatelou K, Gonzalez-Tabares L, Manamley N, Farouk M, Addison J, Donck J, Schneider A, Gutjahr-Lengsfeld L, Ritz E, Scharnagl H, Gelbrich G, Pilz S, Macdougall IC, Wanner C, Drechsler C, Kuntsevich V, Charen E, Kobena D, Sheth N, Siktel H, Levin NW, Winchester JF, Kotanko P, Kaysen G, Kuragano T, Kida A, Yahiro M, Nanami M, Nagasawa Y, Hasuike Y, Nakanishi T, Stamopoulos D, Mpakirtzi N, Dimitratou V, Griveas I, Lianos E, Grapsa E, Sasaki Y, Yamazaki S, Fujita K, Kurasawa M, Yorozu K, Shimonaka Y, Suzuki N, Yamamoto M, Zwiech R, Szczepa ska J, Bruzda-Zwiech A, Rao A, Gilg J, Caskey F, Kirkpantur A, Balci MM, Turkvatan A, Afsar B, Alkis M, Mandiroglu F, Kim YO, Yoon SA, Kim YS, Choi SJ, Min JW, Cheong MA, Hasuike Y, Kida A, Oue M, Yamamoto K, Kimura T, Fukao W, Yahiro M, Kaibe S, Nanami M, Nakanishi T, Djuric PS, Ikonomovski J, Tosic J, Jankovic A, Majster Z, Stankovic Popovic V, Dimkovic N, Aicardi Spalloni V, Del Vecchio L, Longhi S, Violo L, La Milia V, Pontoriero G, Locatelli F, Shino M, Kuji T, Fujikawa T, Toya Y, Umemura S, Macdougall I, Rumjon A, Mangahis E, Goldstein L, Ryzlewicz T, Becker F, Kilgallon W, Fukasawa M, Otake Y, Yamagishi T, Kamiyama M, Kobayashi H, Takeda M, Toida T, Sato Y, Fujimoto S. DIALYSIS ANAEMIA. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu176] [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: 11/12/2022] Open
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Becker F, Yi P, Al-Kofahi M, Ganta VC, Morris J, Alexander JS. Lymphatic dysregulation in intestinal inflammation: new insights into inflammatory bowel disease pathomechanisms. Lymphology 2014; 47:3-27. [PMID: 25109166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Alterations in the intestinal lymphatic network are well-established features of human and experimental inflammatory bowel disease (IBD). Such lymphangiogenic expansion might enhance classic intestinal lymphatic transport, eliminating excess accumulations of fluid, inflammatory cells and mediators, and could therefore be interpreted as an 'adaptive' response to acute and chronic inflammatory processes. However, whether these new lymphatic vessels are functional, unregulated or immature (and what factors may promote 'maturation' of these vessels) is currently an area under intense investigation. It is still controversial whether impaired lymphatic function in IBD is a direct consequence of the intestinal inflammation, or a preceding lymphangitis-like event. Current research has uncovered novel regulatory factors as well as new roles for familiar signaling pathways, which appear to be linked to inflammation-induced lymphatic alterations. The current review summarizes mechanisms amplifying lymphatic dysregulation and remodeling in intestinal inflammation at the organ, cell and molecular levels and discusses the influence of lymphangiogenesis and intestinal lymphatic transport function as they relate to IBD pathophysiology.
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Weber C, Hametner C, Tuchscherer A, Losand B, Kanitz E, Otten W, Sauerwein H, Bruckmaier R, Becker F, Kanitz W, Hammon H. Hepatic gene expression involved in glucose and lipid metabolism in transition cows: Effects of fat mobilization during early lactation in relation to milk performance and metabolic changes. J Dairy Sci 2013; 96:5670-81. [DOI: 10.3168/jds.2012-6277] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 05/23/2013] [Indexed: 01/10/2023]
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Figueira C, Becker F, Blunck C, DiMaria S, Baptista M, Esteves B, Paulo G, Santos J, Teles P, Vaz P. Medical staff extremity dosimetry in CT fluoroscopy: an anthropomorphic hand voxel phantom study. Phys Med Biol 2013; 58:5433-48. [DOI: 10.1088/0031-9155/58/16/5433] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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41
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Becker F, Robert-Ebadi H. [Clinical diagnosis of chronic critical ischemia of lower limb]. Rev Med Suisse 2013; 9:302-305. [PMID: 23469396] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Chronic critical ischemia of the lower limb (CCLI) is the most severe form of peripheral arterial disease. This terminology reflects the need to compare treatments based on an accurate and objective description of the clinical cases rather than subjective items like limb threatening ischemia or intervention for limb salvage. At the stage of CCLI the prognosis is very poor with a high risk of major amputation or disability or death. This highlights the importance of a precise clinical evaluation (including an hemodynamic reading of the clinical assessment of the foot) and of the use of the appropriate diagnostic tools to confirms CCLI diagnosis. This approach is invaluable for the correct stratification of the amputation risk.
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Affiliation(s)
- F Becker
- Service d'angiologie et d'hémostase HUG, 1211 Genève 14.
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42
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Laroche JP, Becker F, Khau-Van-Kien A, Baudoin P, Brisot D, Buffler A, Coupé M, Jurus C, Mestre S, Miserey G, Soulier-Sotto V, Tissot A, Viard A, Vignes S, Quéré I. [Quality standards for ultrasonographic assessment of peripheral vascular malformations and vascular tumors. Report of the French Society for Vascular Medicine]. J Mal Vasc 2013; 38:29-42. [PMID: 23312609 DOI: 10.1016/j.jmv.2012.11.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 11/08/2012] [Indexed: 01/19/2023]
Abstract
THE QUALITY STANDARDS OF THE FRENCH SOCIETY OF VASCULAR MEDICINE FOR THE ULTRASONOGRAPHIC ASSESSMENT OF VASCULAR MALFORMATIONS ARE BASED ON THE TWO FOLLOWING REQUIREMENTS: Technical know-how: mastering the use of ultrasound devices and the method of examination. Medical know-how: ability to adapt the methods and scope of the examination to its clinical indication and purpose, and to rationally analyze and interpret its results. AIMS OF THE QUALITY STANDARDS: To describe an optimal method of examination in relation to the clinical question and hypothesis. To achieve consistent practice, methods, glossary, and reporting. To provide good practice reference points, and promote a high-quality process. ITEMS OF THE QUALITY STANDARDS: The three levels of examination; their clinical indications and goals. The reference standard examination (level 2), its variants according to clinical needs. The minimal content of the examination report; the letter to the referring physician (synthesis, conclusion and proposal for further investigation and/or therapeutic management). Commented glossary (anatomy, hemodynamics, semiology). Technical bases. Settings and use of ultrasound devices. Here, we discuss the methods of using ultrasonography for the assessment of peripheral vascular malformations and tumors.
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Affiliation(s)
- J-P Laroche
- Médecine interne B, médecine vasculaire, hôpital Saint-Éloi, CHU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France.
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Fritzsche C, Becker F, Hemmer CJ, Riebold D, Klammt S, Hufert F, Akam W, Kinge TN, Reisinger EC. Hepatitis B and C: neglected diseases among health care workers in Cameroon. Trans R Soc Trop Med Hyg 2013; 107:158-64. [PMID: 23303802 DOI: 10.1093/trstmh/trs087] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Healthcare workers (HCW) are at risk of acquiring blood-borne viral infections, particularly hepatitis B (HBV), hepatitis C (HCV), and HIV, especially in high endemic regions such as sub-Saharan Africa. METHODS Sera from 237 hospital workers in Southwest Cameroon were tested for anti-hepatitis B core antigen (anti-HBc), hepatitis B surface antigen (HBsAg), anti-hepatitis B surface antigen (anti-HBs), anti-HCV and (on a voluntary basis) for anti-HIV. Information on pre-study testing for HBV, HCV and HIV and pre-study HBV vaccination status was collected from these individuals. RESULTS The pre-study testing rate among participating hospital staff for HBV was 23.6% (56/237), for HCV 16% (38/237), and for HIV 91.6% (217/237). The pre-study HBV vaccination rate was 12.3% (29/237). Analysis of anti-HBc revealed that 73.4% (174/237) of the hospital staff had been infected by HBV. Active HBV infection (HBsAg positivity) was detected in 15 participants. Anti-HCV was found in four of 237 participants, HIV antibodies were detected in four of 200 participants tested. CONCLUSION HBV and HCV are neglected diseases among HCW in sub-Saharan Africa. The vaccination rate against HBV was very low at 12.3%, and therefore anti-HBc testing should be mandatory to identify HCW requiring HBV vaccination. Testing for HBV and routine HBV vaccination for HBV-negative HCW should be strongly enforced in Cameroon.
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Affiliation(s)
- C Fritzsche
- Division of Tropical Medicine and Infectious Diseases, Department of Medicine, University of Rostock Medical School, Ernst-Heydemann-Strasse 6, D-18057 Rostock, Germany.
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Hauswald B, Wolf H, Becker F, Becker S, Schnitker J, Wüstenberg E. Tolerability of a new fast updosed immunologically enhanced subcutaneous immunotherapy formulation with an optimized allergen to adjuvant ratio under routine practice conditions: a noninterventional observational study. J Investig Allergol Clin Immunol 2013; 23:471-477. [PMID: 24654311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
BACKGROUND AND OBJECTIVES A fast updosed immunologically enhanced subcutaneous immunotherapy (SCIT) formulation with an optimized allergen to aluminium hydroxide ratio was first introduced in September 2009 in Germany. A large randomized controlled trial showed that the formulation had considerable immunologic effects and good tolerability. In this open-label, uncontrolled, noninterventional study, tolerability was investigated during routine application. PATIENTS AND METHODS Patients with allergic rhinoconjunctivitis and/or asthma were treated with pollen and mite allergens using a 5-injection updosing schedule (AVANZ: 300, 600, 3000, 6000 and 15 000 SQ+ units) with weekly intervals, followed by a maintenance schedule with injections of 15,000 SQ+ units.Adverse events (AEs) were recorded by physicians, and symptoms and use of symptomatic medication were analyzed before the start of therapy and after an average 8-month treatment period. RESULTS SCIT was documented by 362 allergists in 1036 patients between September 2009 and February 2011. AEs mainly consisted of local reactions during updosing (in 24.5% of patients). Systemic reactions were observed during updosing (8.4%) and maintenance therapy (1.7%), the most frequent of which was dyspnea. Overall, tolerability and the effect of treatment were rated as good or very good by 94.9% and 86.6% of patients and by 96.2% and 89.6% of physicians, respectively. CONCLUSIONS In this open-label, noninterventional study, fast updosed immunologically enhanced SCIT (AVANZ) was well tolerated in a large group of patients.
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Becker F, Kanitz W, Nurnberg G, Rath D. 25 TIMED ARTIFICIAL INSEMINATION ENABLES HIGH FERTILIZATION RATES IN NORMAL CYCLING AND IN SUPEROVULATED CATTLE WITH REDUCED DOSAGES OF UNSORTED SPERMATOZOA AND WITH SEXED SPERMATOZOA. Reprod Fertil Dev 2013. [DOI: 10.1071/rdv25n1ab25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Different factors determine the effectiveness of the use of sires in AI. Most important factors are the number of inseminated spermatozoa, the quality of spermatozoa, and the time of insemination. Especially in superovulated animals, the insemination scheme plays in important role to cover the whole ovulation period. The influence of 3 different dosages of spermatozoa (15 × 106, 5 × 106, and 1 × 106) on fertilization rate was examined in experiment A. In experiment B, one dosage of female and male spermatozoa of 3 different bulls was used for timed AI in 31 heifers. Timed AI in normal-cycling cattle [13 h after gonadotropin-releasing hormone (GnRH) application] with detected corpus luteum (Days 8 to 13 of cycle) was carried out after induction of luteolysis and induction of ovulation [GnRH application 60 h after prostaglandin F2α (PGF2) application]. Embryos and oocytes were flushed from the oviduct of 116 hemicastrated or slaughtered heifers on Day 4 after insemination. The ovulation rate in heifers was 95.4%. Eighty percent of the oocytes or embryos were recovered. The influence of the factors sire, ejaculate, and dosage were tested by GLM analyses of SAS® (SAS Institute Inc., Cary, NC, USA). There was no significant difference in the fertilization rate (93.3, 96.2, and 78.8%) and in the proportion of normally developed embryos (84.6, 80.7, and 75.8%) between groups. Significant differences were found in the mean number of accessory sperms/embryo and in the proportion of embryos with >10 accessory sperms/embryo or without accessory sperms; however, the proportion of intact embryos was similar. Using sexed semen in experiment B, similar results were obtained after flushing of the oviducts on Day 4 after insemination of hemicastrated or slaughtered animals. In total, an ovulation rate of 91.7%, a recovery rate of 70%, and a fertilization rate of 86.8% were obtained. There were no differences between female- and male-sorted spermatozoa and the control group. In experiment C, altogether 13 heifers were treated 8 times with FSH for 4 days starting between Day 8 to 12 of estrous cycle. Prostaglandin F2α was given 48 and 60 h after the first FSH injection. Insemination with sexed semen (n = 5 heifers) and with unsorted semen (n = 8; 15 × 106 and 1 × 106) was done at 55 and 71 h after induction of luteolysis. Flushing of the uterus was performed on Day 7. Using the time-oriented insemination after superovulation of animals, fertilization rates varied between 65 and 85%. There was no difference between groups regarding the number of transferable embryos (5.5, 4.9, and 4.8). The results demonstrate that the application of an approved insemination schedule may accomplish high fertilization rates after insemination with sexed or reduced dosages of spermatozoa in normal-cycling as well as superovulated cattle.
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Weber C, Hametner C, Tuchscherer A, Losand B, Kanitz E, Otten W, Singh SP, Bruckmaier RM, Becker F, Kanitz W, Hammon HM. Variation in fat mobilization during early lactation differently affects feed intake, body condition, and lipid and glucose metabolism in high-yielding dairy cows. J Dairy Sci 2012; 96:165-80. [PMID: 23127904 DOI: 10.3168/jds.2012-5574] [Citation(s) in RCA: 121] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 09/12/2012] [Indexed: 11/19/2022]
Abstract
Fat mobilization to meet energy requirements during early lactation is inevitable because of insufficient feed intake, but differs greatly among high-yielding dairy cows. Therefore, we studied milk production, feed intake, and body condition as well as metabolic and endocrine changes in high-yielding dairy cows to identify variable strategies in metabolic and endocrine adaptation to overcome postpartum metabolic load attributable to milk production. Cows used in this study varied in fat mobilization around calving, as classified by mean total liver fat concentrations (LFC) postpartum. German Holstein cows (n=27) were studied from dry off until d 63 postpartum in their third lactation. All cows were fed the same total mixed rations ad libitum during the dry period and lactation. Plasma concentrations of metabolites and hormones were measured in blood samples taken at d 56, 28, 15, and 5 before expected calving and at d 1 and once weekly up to d 63 postpartum. Liver biopsies were taken on d 56 and 15 before calving, and on d 1, 14, 28, and 49 postpartum to measure LFC and glycogen concentrations. Cows were grouped accordingly to mean total LFC on d 1, 14, and 28 in high, medium, and low fat-mobilizing cows. Mean LFC (±SEM) differed among groups and were 351±14, 250±10, and 159±9 mg/g of dry matter for high, medium, and low fat-mobilizing cows, respectively, whereas hepatic glycogen concentrations postpartum were the highest in low fat-mobilizing cows. Cows in the low group showed the highest dry matter intake and the least negative energy balance postpartum, but energy-corrected milk yield was similar among groups. The decrease in body weight postpartum was greatest in high fat-mobilizing cows, but the decrease in backfat thickness was greatest in medium fat-mobilizing cows. Plasma concentrations of nonesterified fatty acids and β-hydroxybutyrate were highest around calving in high fat-mobilizing cows. Plasma triglycerides were highest in the medium group and plasma cholesterol concentrations were lowest in the high group at calving. During early lactation, the decrease in plasma glucose concentrations was greatest in the high group, and plasma insulin concentrations postpartum were highest in the low group. The revised quantitative insulin sensitivity check index values decreased during the transition period and postpartum, and were highest in the medium group. Plasma cortisol concentrations during the transition period and postpartum period and plasma leptin concentrations were highest in the medium group. In conclusion, cows adapted differently to the metabolic load and used variable strategies for homeorhetic regulation of milk production. Differences in fat mobilization were part of these strategies and contributed to the individual adaptation of energy metabolism to milk production.
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Affiliation(s)
- C Weber
- Leibniz Institute for Farm Animal Biology (FBN), 18196 Dummerstorf, Germany
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Becker F, Weiss JM. Relations entre le niveau de risque psychosocial et le niveau de stress professionnel perçu chez les collaborateurs des agences commerciales d’un groupe industriel de fabrication de matériel électrique en France. ARCH MAL PROF ENVIRO 2012. [DOI: 10.1016/j.admp.2012.09.033] [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: 11/30/2022]
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Becker F, Borgmann M, Bertram J, Hansen K, Koch M, Hannus S. 179 Bringing Light into Antibody Binding Characteristics in Crude Extracts by Means of FCCS. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71977-9] [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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Dick F, Ricco JB, Davies AH, Cao P, Setacci C, de Donato G, Becker F, Robert-Ebadi H, Eckstein HH, De Rango P, Diehm N, Schmidli J, Teraa M, Moll FL, Lepäntalo M, Apelqvist J. Chapter VI: Follow-up after revascularisation. Eur J Vasc Endovasc Surg 2012; 42 Suppl 2:S75-90. [PMID: 22172475 DOI: 10.1016/s1078-5884(11)60013-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Structured follow-up after revascularisation for chronic critical limb ischaemia (CLI) aims at sustained treatment success and continued best patient care. Thereby, efforts need to address three fundamental domains: (A) best medical therapy, both to protect the arterial reconstruction locally and to reduce atherosclerotic burden systemically; (B) surveillance of the arterial reconstruction; and (C) timely initiation of repeat interventions. As most CLI patients are elderly and frail, sustained resolution of CLI and preserved ambulatory capacity may decide over independent living and overall prognosis. Despite this importance, previous guidelines have largely ignored follow-up after CLI; arguably because of a striking lack of evidence and because of a widespread assumption that, in the context of CLI, efficacy of initial revascularisation will determine prognosis during the short remaining life expectancy. This chapter of the current CLI guidelines aims to challenge this disposition and to recommend evidentially best clinical practice by critically appraising available evidence in all of the above domains, including antiplatelet and antithrombotic therapy, clinical surveillance, use of duplex ultrasound, and indications for and preferred type of repeat interventions for failing and failed reconstructions. However, as corresponding studies are rarely performed among CLI patients specifically, evidence has to be consulted that derives from expanded patient populations. Therefore, most recommendations are based on extrapolations or subgroup analyses, which leads to an almost systematic degradation of their strength. Endovascular reconstruction and surgical bypass are considered separately, as are specific contexts such as diabetes or renal failure; and critical issues are highlighted throughout to inform future studies.
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Affiliation(s)
- F Dick
- Department of Cardiovascular Surgery, Swiss Cardiovascular Centre, University Hospital Berne, Switzerland.
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Becker F, Robert-Ebadi H, Ricco JB, Setacci C, Cao P, de Donato G, Eckstein HH, De Rango P, Diehm N, Schmidli J, Teraa M, Moll FL, Dick F, Davies AH, Lepäntalo M, Apelqvist J. Chapter I: Definitions, epidemiology, clinical presentation and prognosis. Eur J Vasc Endovasc Surg 2012; 42 Suppl 2:S4-12. [PMID: 22172472 DOI: 10.1016/s1078-5884(11)60009-9] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The concept of chronic critical limb ischaemia (CLI) emerged late in the history of peripheral arterial occlusive disease (PAOD). The historical background and changing definitions of CLI over the last decades are important to know in order to understand why epidemiologic data are so difficult to compare between articles and over time. The prevalence of CLI is probably very high and largely underestimated, and significant differences exist between population studies and clinical series. The extremely high costs associated with management of these patients make CLI a real public health issue for the future. In the era of emerging vascular surgery in the 1950s, the initial classification of PAOD by Fontaine, with stages III and IV corresponding to CLI, was based only on clinical symptoms. Later, with increasing access to non-invasive haemodynamic measurements (ankle pressure, toe pressure), the need to prove a causal relationship between PAOD and clinical findings suggestive of CLI became a real concern, and the Rutherford classification published in 1986 included objective haemodynamic criteria. The first consensus document on CLI was published in 1991 and included clinical criteria associated with ankle and toe pressure and transcutaneous oxygen pressure (TcPO(2)) cut-off levels <50 mmHg, <30 mmHg and <10 mmHg respectively). This rigorous definition reflects an arterial insufficiency that is so severe as to cause microcirculatory changes and compromise tissue integrity, with a high rate of major amputation and mortality. The TASC I consensus document published in 2000 used less severe pressure cut-offs (≤ 50-70 mmHg, ≤ 30-50 mmHg and ≤ 30-50 mmHg respectively). The thresholds for toe pressure and especially TcPO(2) (which will be also included in TASC II consensus document) are however just below the lower limit of normality. It is therefore easy to infer that patients qualifying as CLI based on TASC criteria can suffer from far less severe disease than those qualifying as CLI in the initial 1991 consensus document. Furthermore, inclusion criteria of many recent interventional studies have even shifted further from the efforts of definition standardisation with objective criteria, by including patients as CLI based merely on Fontaine classification (stage III and IV) without haemodynamic criteria. The differences in the natural history of patients with CLI, including prognosis of the limb and the patient, are thus difficult to compare between studies in this context. Overall, CLI as defined by clinical and haemodynamic criteria remains a severe condition with poor prognosis, high medical costs and a major impact in terms of public health and patients' loss of functional capacity. The major progresses in best medical therapy of arterial disease and revascularisation procedures will certainly improve the outcome of CLI patients. In the future, an effort to apply a standardised definition with clinical and objective haemodynamic criteria will be needed to better demonstrate and compare the advances in management of these patients.
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Affiliation(s)
- F Becker
- Division of Angiology and Hemostasis, Geneva University Hospitals, Geneva, Switzerland. fran¸
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