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Additional file 1 Table A1. Overview on the development and evaluation process of the video-based, student tutor-led course. Table A2. Questionnaire for subjective learning success and acceptance of the teaching video exemplary for the transthoracic echocardiography video. Participants’ subjective learning success and acceptance of the teaching videos was evaluated using modified questionnaires with scale-rated closed (from 1 does fully apply to 4 does not apply) and open questions based on Kirkpatrick’s evaluation level model. Table A3. Comparison of the score points achieved in the OSCE tasks between the video-based, student tutor and the faculty staff-led course.

Additional file 2 Figure A1. Screen shot example from the abdominal ultrasound video. Panel A shows ultrasound probe position for the standard view of the liver. Panel B shows schematic probe position for this view as presented in the video. Panel C shows obtained ultrasound image from this view. Panel D shows the same ultrasound image including labeling of anatomic landmarks to be identified in this standard view. Figure A2. Screen shot example from the TTE video. Panel A shows screen shot for overview thorax anatomy and 3 respective transthoracic echocardiography (TTE) standard views. Panel B shows probe handling and patient positioning for standard view parasternal long-axis. Panel C shows the obtained ultrasound image of the heart from this standard view. Panel D shows the corresponding schematic drawing with the right (RV) and left ventricle (LV), interventricular septum (IVS), aortic valve (AK) und left atrium (LA) as presented in the video.

Capnocytophaga canimorsus (CC) belongs to the family Flavobacteriaceae which physiologically occurs in the natural flora of the oral mucosa of dogs and cats. In patients with a compromised immune system, CC can induce a systemic infection with a fulminant course of disease. Infections with CC are rare, and the diagnosis is often complicated and prolonged. We describe a patient with a medical history of prior splenectomy who presented with an acute sepsis and disseminated intravascular coagulation (DIC) and was initially treated on Waterhouse–Friderichsen syndrome (WFS). After the patient had died despite forced treatment in the intermediate care unit, the differential diagnosis of CC was confirmed by culture of blood smears. Later on, a retrospective third-party anamnesis revealed that the patient had contact to his neighbour’s dog a few days before disease onset. In conclusion, patients with CC infection can mimic WFS and therefore must be included in the differential diagnosis, especially in patients with a corresponding medical history of dog or cat bites, scratches, licks, or simple exposure.

Introduction The aim of the study was to test the hypothesis that a pumpless arteriovenous extracorporeal membrane oxygenator (interventional lung assist (ILA)) does not significantly improve oxygenation in a lavage model of acute lung injury. Methods The study was designed as a prospective experimental study. The experiments were performed on seven pigs (48–60 kg body weight). The pigs were anesthetized and mechanically ventilated. Both femoral arteries and one femoral vein were cannulated and connected with ILA. Acute lung injury was induced by repeated bronchoalveolar lavage until the arterial partial pressure of O2 was lower than 100 Torr for at least 30 minutes during ventilation with 100% O2. Results ILA was applied with different blood flow rates through either one or both femoral arteries. Measurements were repeated at different degrees of pulmonary gas exchange impairment with the pulmonary venous admixture ranging from 35.0% to 70.6%. The mean (± standard deviation) blood flow through ILA was 15.5 (± 3.9)% and 21.7 (± 4.9)% of cardiac output with one and both arteries open, respectively. ILA significantly increased the arterial partial pressure of O2 from 64 (± 13) Torr to 71 (± 14) Torr and 74 (± 17) Torr with blood flow through one and both femoral arteries, respectively. O2 delivery through ILA increased with extracorporeal shunt flow (36 (± 14) ml O2/min versus 47 (± 17) ml O2/min) and reduced arterialization of the inlet blood. Pulmonary artery pressures were significantly reduced when ILA was in operation. Conclusion Oxygenation is increased by ILA in severe lung injury. This effect is significant but small. The results indicate that the ILA use may not be justified if the improvement of oxygenation is the primary therapy goal.