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Sandow T, Thevenot P, Gimenez J, Arndt S, Nunez K, DeVun D, Gulotta P, Ramalingam V, Gilbert P, Kirsch D, Bohorquez H, Kay D, Cohen A. 3:18 PM Abstract No. 35 ■ DISTINGUISHED ABSTRACT Lymphopenia selects poor DEB-TACE response in transplant waitlist patients: prospective, single-center, observational study. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Arndt S, Gilbert P, Sandow T, Kay D, DeVun D, Goldman D, Gimenez J, Ramalingam V. Abstract No. 488 Overall survival and survival after second primary in thermal ablation, resection, and transplantation in patients with cured primary and subsequent second primary hepatocellular carcinoma, a SEER study. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Arndt S, Sandow T, Gimenez J, Kay D, Gulotta P, DeVun D, Gilbert P, Ramalingam V. Abstract No. 504 Drug-eluting bead TACE response predicts post liver transplant recurrence in a 6-year cohort. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Goldman D, Sandow T, Gimenez J, Arndt S, Thevenot P, Nunez K, DeVun D, Gulotta P, Ramalingam V, Gilbert P, Kirsch D, Bohorquez H, Galliano G, Cohen A, Kay D. 3:00 PM Abstract No. 33 Pre-TACE immune status correlates with treatment response and necrosis rates in HCC as a bridge to liver transplant. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Arndt S, Sandow T, Milburn J, Nguyen T, Goldman D, Gimenez J, Ramalingam V. 3:00 PM Abstract No. 181 Machine learning and machine vision image analysis can predict treatment response from preprocedural imaging alone for Y90 radioembolization and DEB-TACE in hepatocellular carcinoma. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Arndt S, Sandow T, Kay D, DeVun D, Gulotta P, Kirsch D, Ramalingam V, Nunez K, Bohorquez H, Cohen A, Thevenot P, Gimenez J. 3:27 PM Abstract No. 274 A prospective study of lung shunt fraction as a determinant of DEB-TACE response and metastasis and determinants of lung shunt fraction. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Aschendorff A, Arndt S, Laszig R, Wesarg T, Hassepaß F, Beck R. [Treatment and auditory rehabilitation of intralabyrinthine schwannoma by means of cochlear implants - German Version]. HNO 2017; 65:321-327. [PMID: 27573449 DOI: 10.1007/s00106-016-0216-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND To date, the therapy of intralabyrinthine schwannoma consists mainly of a wait-and-see approach, completely ignoring auditory rehabilitation. Only a few single-case reports are as yet available on treatment with cochlear implants (CI). AIM OF THE STUDY This study aimed to assess the results of auditory rehabilitation after treatment with CI in a series of cases. MATERIALS AND METHODS The demographic findings, symptoms, and results of surgical therapy in 8 patients were evaluated in a retrospective analysis. RESULTS Prior to surgery, all patients presented with profound hearing loss and tinnitus. Episodic dizziness was reported by 3 patients. Among the patients, 4 had an intracochlear and 3 an intravestibular schwannoma, and a transmodiolar schwannoma was found in 1 patient. A total of 6 patients underwent treatment with CI. The results of auditory rehabilitation are favorable with open-set speech comprehension. DISCUSSION CI treatment following resection of an intralabyrinthine schwannoma is a promising option for auditory rehabilitation, even in single-sided deafness. This is a new treatment concept in contrast to the wait-and-scan policy. Expectant management appears justified only if the patient still has usable hearing.
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Nordheim J, O’Sullivan J, Gellert P, Arndt S, Kuhlmey A, Antons J. TABLET-BASED INTERVENTION FOR NURSING HOME RESIDENTS WITH DEMENTIA: A CLUSTER RCT. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.5041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Colmenares M, Simon U, Yildiz M, Arndt S, Schomaecker R, Thomas A, Rosowski F, Gurlo A, Goerke O. Oxidative coupling of methane on the Na2WO4-MnxOy catalyst: COK-12 as an inexpensive alternative to SBA-15. CATAL COMMUN 2016. [DOI: 10.1016/j.catcom.2016.06.025] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Aschendorff A, Arndt S, Laszig R, Wesarg T, Hassepaß F, Beck R. Treatment and auditory rehabilitation of intralabyrinthine schwannoma by means of cochlear implants. HNO 2016; 65:46-51. [DOI: 10.1007/s00106-016-0217-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Karrer S, Arndt S. [Plasma medicine in dermatology: Mechanisms of action and clinical applications]. DER HAUTARZT 2016; 66:819-28. [PMID: 26391324 DOI: 10.1007/s00105-015-3686-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Plasma medicine has developed into an innovative field of research showing high potential. Since the establishment of cold atmospheric plasma, new, multifaceted medical treatment opportunities have become available. Within a short time a multidisciplinary special interest group of medical scientists, physicists, and biologists was created, aiming to understand plasma medicine and answer clinical as well as scientific questions. In dermatology, new horizons are being opened for wound healing, tissue regeneration, treatment of skin infections, and tumor therapy. A major task will be the introduction of plasma into clinical medicine and, simultaneously, the further investigation of the mechanisms of action of plasma at the cellular level. Only then can the safety of plasma treatment in patients be assured.
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Barnett GA, Schofield CJ, Al-Lamee K, Casaretto M, Arndt S, Egginton S, Gershlick AH. 3 Angiogenesis as a therapeutic option for untreatable CTO. BRITISH HEART JOURNAL 2016. [DOI: 10.1136/heartjnl-2016-309588.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Zirn S, Arndt S, Aschendorff A, Wesarg T. Interaural stimulation timing in single sided deaf cochlear implant users. Hear Res 2015; 328:148-56. [PMID: 26302945 DOI: 10.1016/j.heares.2015.08.010] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 08/13/2015] [Accepted: 08/19/2015] [Indexed: 11/17/2022]
Abstract
The interaural time difference (ITD) is an important cue for the localization of sounds. ITD changes as little as 10 μs can be detected by the human auditory system. By provision of one ear with a cochlear implant (CI) ITD are altered due to the partial replacement of the peripheral auditory system. A hearing aid (HA), in contrast, does not replace but adds a processing delay component to the peripheral auditory system extending ITD. The aim of the present study was to quantify interaural stimulation timing between these different modalities to estimate the need for central auditory temporal compensation in single sided deaf CI users or bimodal CI/HA users. For this purpose, wave V latencies of auditory brainstem responses evoked either acoustically (ABR) or electrically via the CI (EABR) have been measured. The sum of delays consisting of CI signal processing measured in the MED-EL OPUS2 audio processor and EABR wave V latencies evoked on different intracochlear sites allowed an estimation of the entire CI channel-specific delay for MED-EL MAESTRO CI systems. We compared these values with ABR wave V latencies measured in the contralateral normal hearing or HA provided ear in different frequency bands. The results showed that EABR wave V latencies were consistently shorter than those evoked acoustically in the unaided normal hearing ear. Thus, artificial delays within the audio processor can be implemented to adjust interaural stimulation timing. The currently implemented group delays in the MED-EL CI system turned out to be reasonably similar to those of the unaided ear. For adjustment of CI and contralateral HA, in contrast, an adjustable additional across-frequency delay in the range of 1-11 ms implemented in the CI would be required. Especially for bimodal CI/HA users the adjustment of interaural stimulation timing may induce improved binaural hearing, reduced need for central auditory temporal compensation and increased acceptance of the CI/HA provision.
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Schmitz-Bortz E, Baraliakos X, Braun J, Arndt S, Christoph J, Dybowski F, Hein L, Hübner G, Igelmann M, Kalthoff L, Klinik C, Menne J, Mintrop B, Schmid A, Schoo U, Krause D. AB0450 Outpatients' Biologic Agent Therapy in Private Practices in Western Germany – a Survey and a Retrospective Study. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sadjadi S, Jašo S, Godini HR, Arndt S, Wollgarten M, Blume R, Görke O, Schomäcker R, Wozny G, Simon U. Feasibility study of the Mn–Na2WO4/SiO2 catalytic system for the oxidative coupling of methane in a fluidized-bed reactor. Catal Sci Technol 2015. [DOI: 10.1039/c4cy00822g] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalytic system Mn–Na2WO4/SiO2, was studied in a miniplant fluidized-bed reactor for oxidative coupling of methane.
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Godini H, Gili A, Görke O, Arndt S, Simon U, Thomas A, Schomäcker R, Wozny G. Sol–gel method for synthesis of Mn–Na2WO4/SiO2 catalyst for methane oxidative coupling. Catal Today 2014. [DOI: 10.1016/j.cattod.2014.01.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Yildiz M, Simon U, Otremba T, Aksu Y, Kailasam K, Thomas A, Schomäcker R, Arndt S. Support material variation for the MnxOy-Na2WO4/SiO2 catalyst. Catal Today 2014. [DOI: 10.1016/j.cattod.2013.12.024] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Chatelard P, Reinke N, Arndt S, Belon S, Cantrel L, Carenini L, Chevalier-Jabet K, Cousin F, Eckel J, Jacq F, Marchetto C, Mun C, Piar L. ASTEC V2 severe accident integral code main features, current V2.0 modelling status, perspectives. NUCLEAR ENGINEERING AND DESIGN 2014. [DOI: 10.1016/j.nucengdes.2013.06.040] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Steinmetz C, Mader I, Arndt S, Aschendorff A, Laszig R, Hassepass F. MRI artefacts after Bonebridge implantation. Eur Arch Otorhinolaryngol 2014; 271:2079-82. [DOI: 10.1007/s00405-014-3001-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 03/03/2014] [Indexed: 11/30/2022]
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Hassepass F, Stabenau V, Arndt S, Beck R, Bulla S, Grauvogel T, Aschendorff A. Magnet dislocation: an increasing and serious complication following MRI in patients with cochlear implants. ROFO-FORTSCHR RONTG 2014; 186:680-5. [PMID: 24497090 DOI: 10.1055/s-0033-1356238] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE Cochlear implantation (CI) represents the gold standard in the treatment of children born deaf and postlingually deafened adults. Initial magnetic resonance imaging (MRI) was contraindicated in CI users. Meanwhile, there are specific recommendations concerning MRI compatibility depending on the type of CI system and the device manufacturer. Some CI systems are even approved for MRI with the internal magnet left in place. The aim of this study was to analyze all magnet revision surgeries in CI patients at one CI center and the relationship to MRI scans over time. MATERIALS AND METHODS Between 2000 and 2013, a total of 2027 CIs were implanted. The number of magnet dislocation (MD) surgeries and their causes was assessed retrospectively. RESULTS In total 12 cases of MD resulting from an MRI scan (0.59 %) were observed, accounting for 52.2 % of all magnetic revision surgeries. As per the labeling, it was considered safe to leave the internal magnet in place during MRI while following specific manufacturer recommendations: MRI intensity of 1.5 Tesla (T) and compression head bandage during examination. CONCLUSION A compression head bandage in a 1.5 T MRI unit does not safely prevent MD and the related serious complications in CI recipients. We recommend a Stenvers view radiograph after MRI with the internal magnet in place for early identification of MD, at least in the case of pain during or after MRI examination. MRI in CI patients should be indicated with restraint and patients should be explicitly informed about the possible risks. Recommendations regarding MRI compatibility and the handling of CI patients issued with MRI for the most common CI systems are summarized.
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Yildiz M, Aksu Y, Simon U, Kailasam K, Goerke O, Rosowski F, Schomäcker R, Thomas A, Arndt S. Enhanced catalytic performance of MnxOy–Na2WO4/SiO2 for the oxidative coupling of methane using an ordered mesoporous silica support. Chem Commun (Camb) 2014; 50:14440-2. [PMID: 25302934 DOI: 10.1039/c4cc06561a] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxidative coupling of methane is a highly promising reaction for its direct conversion.
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Haag SF, Tscherch K, Arndt S, Kleemann A, Gersonde I, Lademann J, Rohn S, Meinke MC. Enhancement of skin radical scavenging activity and stratum corneum lipids after the application of a hyperforin-rich cream. Eur J Pharm Biopharm 2013; 86:227-33. [PMID: 23811220 DOI: 10.1016/j.ejpb.2013.06.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 06/11/2013] [Accepted: 06/15/2013] [Indexed: 11/25/2022]
Abstract
Hyperforin is well-known for its anti-inflammatory, anti-tumor, anti-bacterial, and antioxidant properties. The application of a hyperforin-rich verum cream could strengthen the skin barrier function by reducing radical formation and stabilizing stratum corneum lipids. Here, it was investigated whether topical treatment with a hyperforin-rich cream increases the radical protection of the skin during VIS/NIR irradiation. Skin lipid profile was investigated applying HPTLC on skin lipid extracts. Furthermore, the absorption- and scattering coefficients, which influence radical formation, were determined. 11 volunteers were included in this study. After a single cream application, VIS/NIR-induced radical formation could be completely inhibited by both verum and placebo showing an immediate protection. After an application period of 4weeks, radical formation could be significantly reduced by 45% following placebo application and 78% after verum application showing a long-term protection. Furthermore, the skin lipids in both verum and placebo groups increased directly after a single cream application but only significantly for ceramide [AP], [NP1], and squalene. After long-term cream application, concentration of cholesterol and the ceramides increased, but no significance was observed. These results indicate that regular application of the hyperforin-rich cream can reduce radical formation and can stabilize skin lipids, which are responsible for the barrier function.
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Klein-Heßling W, Arndt S. 4th COCOSYS User's Workshop at GRS. KERNTECHNIK 2013. [DOI: 10.3139/124.012035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Arndt S, Meyer F, Brandt-Nedelev B, Wartmann T, Lippert H, Halangk W. [Implications of nutritional status for onset and characteristics of experimental acute pancreatitis in a mouse model]. Zentralbl Chir 2013; 138:471-9. [PMID: 23575520 DOI: 10.1055/s-0032-1328099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND Due to uncontrolled activation of digestive enzymes produced within the pancreas, acute pancreatitis is a disease with a great potential for complications and variable course. Since the pathophysiological steps of human pancreatitis can only be inadequately investigated, various animal models were established to study the course of disease. The model of supramaximal caerulein stimulation allows to gain insights into intracellular events of the early phase of acute pancreatitis. Usually, overnight fasted animals are used for the model of acute pancreatitis to achieve a maximum zymogen granula accumulation and a standardised initial situation due to diminished secretion of CCK. Furthermore, the role of the nutritional state for pathogenesis and course of acute pancreatitis is controversially discussed. The aim of the study was to investigate the impact of the nutritional status on pancreatic injury in experimental acute pancreatitis. METHODS Using standardised supramaximal caerulein stimulation (dose: 50 µg/kg; time intervals, 1/h; max. 7×), acute oedematous interstitial pancreatitis in fasted and non-fasted mice was induced. Pancreatic injury was locally characterised by pancreatic oedema, histopathological alterations and the release of pancreatic enzyme to the serum while systemic alterations were objectified by IL-6, CRP und pulmonal MPO. RESULTS 1) Increased pancreatic serum enzyme levels after induction of acute pancreatitis in non-fasted animals do not reflect a greater affection of the pancreas since amylase and lipase in serum and pancreatic tissue correlate proportionally. The induction of acute pancreatitis provoked release of 1.3 % and 0.7 % of amylase and lipase, respectively, independently of nutritional status. 2) Neither local nor systemic parameters of pancreatic injury were significantly altered by the nutritional regimen. Pathohistologic investigations revealed increase of zymogen granula portion and cell size in non-fasted mice but no further differences compared with fasted animals. 3) During a 16-hour recovery period (no further caerulein injection), local and systemic parameters normalised. DISCUSSION In the relatively mild model of pancreatitis induced by hormonal hyperstimulation, there was no greater pancreatic injury despite higher intrapancreatic enzyme accumulation in non-fasted animals indicating a steady state between potentially damaging and protective factors and mechanisms.
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Wex C, Stoll A, Fröhlich M, Arndt S, Lippert H. How preservation time changes the linear viscoelastic properties of porcine liver. Biorheology 2013; 50:115-31. [DOI: 10.3233/bir-130632] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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