5 results on '"Heiko Sorg"'
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2. A Novel Technique for the Standardized Application of Shock Waves in Experimental Research: The Diver Box
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Jonas Kolbenschlag, Andrej Ring, Ole Goertz, Nick Spindler, Stefan Langer, Inga Zwetzich, Joerg Hauser, Heiko Sorg, and Daniel J. Tilkorn
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Novel technique ,Shock wave ,Materials science ,Acoustics and Ultrasonics ,Acoustics ,Biophysics ,Skin Diseases ,High-Energy Shock Waves ,Mice ,030207 dermatology & venereal diseases ,03 medical and health sciences ,0302 clinical medicine ,Animals ,Radiology, Nuclear Medicine and imaging ,Electrical impedance ,Skin ,Mice, Inbred BALB C ,Radiological and Ultrasound Technology ,Water ,030208 emergency & critical care medicine ,Glass container ,Experimental research ,Coupling (electronics) ,Disease Models, Animal ,Phase reversal ,Reflection (physics) ,Female ,Glass ,Gels ,human activities - Abstract
The Diver Box is designed to prevent impedance differences, energy loss or damage to neighboring structures caused by the use of shock waves with application gels. The Diver Box is an acrylic glass container filled with tempered water and includes a coupling membrane to prevent the impedance jump from air to water and to avoid the continuous propagation of shock waves into the tissue, maintaining wave dynamics. Different modes of extracorporeal shock waves can be applied to a mouse skin wound without energy loss and protected from harmful phase-reversed waves. Macroscopic changes were seen in only 5% to 12% of tested specimens. Hazardous phase reversal, back reflection and mechanical tissue damage can be avoided by use of the Diver Box, ensuring standardized extracorporeal shock wave application.
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- 2018
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3. Bewertung des Stellenwerts und der Voraussetzungen der medizinischen Habilitation in Deutschland durch die beurteilenden Kommissionen
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Jörg Hauser, Daniel J. Tilkorn, Simon Thönnes, Julia M. Reinke, Christian G. G. Schwab, Robert Krämer, Heiko Sorg, and Christoph Grieswald
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Gynecology ,medicine.medical_specialty ,Health Policy ,education.educational_degree ,Medicine (miscellaneous) ,Habilitation ,Education ,03 medical and health sciences ,0302 clinical medicine ,030220 oncology & carcinogenesis ,Political science ,medicine ,030212 general & internal medicine ,education - Abstract
Zusammenfassung Zielsetzung In Deutschland wird die Habilitation in der Humanmedizin und den Gesundheitswissenschaften von etwa 850 Kandidatinnen und Kandidaten jahrlich erfolgreich abgeschlossen. Demgegenuber steht eine nur begrenzte Anzahl akademischer Positionen. Zudem haben sich die Bildungs- und Gesellschaftsstrukturen in den letzten Jahren erheblich verandert, was die Bedeutung des spezifisch deutschen Qualifikationsnachweises infrage stellte. Ziel war es daher, ein aktuelles Meinungsbild der Mitglieder von medizinischen Habilitationskommissionen zu den Voraussetzungen, Verfahren und zur generellen Bedeutung der medizinischen Habilitation zu erfragen sowie potentielle Reformwunsche aus Sicht der Kommission selbst zu erfassen. Methodik Die Untersuchung wurde als online-Umfrage zu sozio-biographischen Merkmalen und zu subjektiven Einschatzungen bzgl. den Bedingungen, Stellenwert, Karrierewegen sowie Reformwunschen der Habilitation durchgefuhrt. Ergebnisse Die Umfrageteilnehmer schatzten den Stellenwert der Habilitation mit 71,3 % als uberwiegend hoch ein. In der medizinischen Auffassung der Humboldt-Trias (Forschung, Lehre, Krankenversorgung) wurden Forschung (94,3 %) und Lehre (89,7 %) als wichtigste Habilitationsvoraussetzungen bewertet. Auf die Frage der Motivation wurde daher auch von 91,0 % die Freude an der Forschung, mit 78,2 % die Freude an der Lehre und mit 65,5 % die besseren beruflichen Zukunftschancen angegeben. Eine Gleichstellung der Habilitation mit einem Ph.D. wird von den Befragten klar abgelehnt (58,6 %). Eine Abschaffung der Habilitation steht mehrheitlich auser Frage, jedoch bestehen klare Wunsche zur Reform, welche vorzugsweise interne Hurden wie die Abhangigkeit von Ordinarien und mehr Transparenz im Verfahren, aber auch die Forderung einer bundeseinheitlichen Habilitationsordnung betreffen. Schlussfolgerung Die medizinische Habilitation hat trotz kontroverser Diskussionen nach Ansicht der Habilitationskommissionen noch immer ihre Bedeutung und wird trotz einiger Kritikpunkte als zeitgemas eingestuft. Es bestehen jedoch klare Hinweise zur Reform, welche sowohl lokaler, nationaler und internationaler Erneuerungen bedurfen, um eine Chancengleichheit der Kandidaten herzustellen und damit entsprechende Karriereoptionen zu eroffnen.
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- 2016
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4. Remote effects of extracorporeal shock wave therapy on cutaneous microcirculation
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Eirini Liodaki, Felix Stang, Tobias Kisch, Heiko Sorg, Karsten Knobloch, Vinzent Forstmeier, Peter Mailänder, and Robert Krämer
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Ischemia ,Hemodynamics ,Dermatology ,Hindlimb ,Placebo ,High-Energy Shock Waves ,Pathology and Forensic Medicine ,Microcirculation ,Rats, Sprague-Dawley ,Re-Epithelialization ,Laser-Doppler Flowmetry ,medicine ,Animals ,Humans ,Skin ,Oxygen saturation (medicine) ,Wound Healing ,business.industry ,Laser Doppler velocimetry ,medicine.disease ,Rats ,Anesthesia ,Body region ,Burns ,business ,Blood Flow Velocity - Abstract
Background Extracorporeal shock wave treatment (ESWT) has proven its clinical benefits in different fields of medicine. Tissue regeneration and healing is improved after shock wave treatment. Even in the case of burn wounds angiogenesis and re-epithelialization is accelerated, but ESWT in extensive burn wounds is impracticable. Hypothesis High energy ESWT influences cutaneous microcirculation at body regions remote from application site. Methods Eighteen Sprague Dawley rats were randomly assigned to two groups and received either high energy ESWT (Group A: total 1000 impulses, 10 J) or placebo shock wave treatment (Group B: 0 impulses, 0 J), applied to the dorsal lower leg of the hind limb. Ten minutes later microcirculatory effects were assessed at the contralateral lower leg of the hind limb (remote body region) by combined Laser-Doppler-Imaging and Photospectrometry. Results In Group A cutaneous capillary blood velocity was significantly increased by 152.8% vs. placebo ESWT at the remote body location (p = 0.01). Postcapillary venous filling pressure remained statistically unchanged (p > 0.05), while cutaneous tissue oxygen saturation increased by 12.7% in Group A (p = 0.220). Conclusion High energy ESWT affects cutaneous hemodynamics in body regions remote from application site in a standard rat model. The results of this preliminary study indicate that ESWT might be beneficial even in disseminated and extensive burn wounds by remote shock wave effects and should therefore be subject to further scientific evaluation.
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- 2015
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5. Efficacy of antithrombin in the prevention of microvascular thrombosis during endotoxemia: An intravital microscopic study
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Rolando E. Rumbaut, Brigitte Vollmar, Johannes N. Hoffmann, Michael D. Menger, Heiko Sorg, and Nicole Lindenblatt
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Male ,medicine.medical_specialty ,Ischemia ,Microcirculation ,Mice ,Internal medicine ,Antithrombotic ,medicine ,Animals ,Thrombus ,Disseminated intravascular coagulation ,Fibrin ,Heparin ,business.industry ,Antithrombin ,Anticoagulants ,Thrombosis ,Hematology ,medicine.disease ,Endotoxemia ,Mice, Inbred C57BL ,Microscopy, Fluorescence ,Immunology ,Cardiology ,Female ,business ,medicine.drug - Abstract
The KyberSept trial in septic patients showed that antithrombin (AT) reduced 90-day mortality significantly in a subgroup of patients not receiving concomitant heparin for thrombosis prophylaxis. Microvascular thrombosis is a key pathophysiologic mechanism during sepsis, ischemia/reperfusion and disseminated intravascular coagulation (DIC). Therefore, this study investigated the antithrombotic property of AT as potential monotherapy in an experimental endotoxemia model in order to omit concomitant heparin.Using a light/dye injury model in the ear and the cremaster muscle preparation of mice, we quantitatively assessed microvascular thrombus formation in a total of 30 endotoxemic mice by means of intravital fluorescence microscopy. Before thrombus induction animals received a single i.v. bolus of AT (100 or 250 IU/kg), heparin (100 IU/kg) or saline (NaCl).In NaCl-treated endotoxemic animals, light/dye exposure led to complete thrombotic occlusion in arterioles and venules within450 s in the ear model. Heparin delayed thrombotic vessel occlusion by more than 50%. AT significantly prolonged times until thrombotic vessel occlusion in a dose-dependent manner and more effectively than heparin (p0.05 vs. NaCl and heparin). This anti-coagulative effect of AT was especially pronounced in arterioles. Upon light/dye exposure to cremaster muscle preparations in endotoxemic mice AT also caused a 4-fold delay in microvascular thrombus growth with 827+/-77 s until complete thrombotic occlusion.We could characterize for the first time AT-mediated antithrombotic activity during endotoxemia in two models of phototoxicity-induced microvascular thrombosis. Our results clearly demonstrate an additional AT mechanism of action that may be responsible for beneficial effects observed during endotoxemia and DIC. This AT profile may allow future high-dose AT application without giving heparin for thrombosis prophylaxis, an intriguing strategy that is to be tested under clinical conditions.
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- 2007
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