Measurements of Air Concentration and Velocities in a Free Falling Water Jet

The prediction of air entrainment in a free falling water jet (two-phase flow) is affected by large uncertainties. A current research project at the Vienna University of Technology is dealing with this phenomenon by means of experimental tests and CFD-calculations. The experimental investigation was conducted in order to measure the air concentration in such a free falling jet using a fibre-optic probe. The velocity was measured with a high speed camera. The tests were performed on a jet which exits a circular pipe with a diameter of 40 mm. The air concentration was measured transversally at several distances away from the nozzle exit. The test results should provide a data basis for CFD-calculations of the air entrainment in a further research step

Rainbows: A primary health care initiative for primary schools

Within the current Australian health system is the understanding of a need to change from the predominate biomedical model to incorporate a comprehensive primary health care centred approach, embracing the social contexts of health and wellbeing. Recent research investigated the benefits of the primary health care philosophy and strategies in relation to the Rainbows programme which addresses grief and loss in primary school aged students in Western Australia. A multidisciplinary collaboration between the Western Australian Departments of Health and Education enabled community school health nurse coordinators to train teacher facilitators in the implementation of Rainbows, enabling support for students and their parents. The results of this qualitative study indicate that all participants regard Rainbows as effective, with many perceived benefits to students and their families

“My Companion Through The Pandemic”: The Importance of the Human-Animal Bond During COVID-19

The COVID- 19 pandemic, due to its global biopsychosocial effects, encourages re-search regarding the promotion of health. Studies in this area concentrate on the human–animal bond as a source of physical and psychological well- being (Shoesmith et al., 2021). In this context, contradictory results have been reported, which on the one hand underline the positive influences of animal companionship on humans’ well- being (Ratschen et al., 2020), and on the other hand demonstrate contrary effects (Mueller et al., 2021). Based on inconsistent findings, the present study aimed to investigate to what extent the human–animal bond influences different psychosocial parameters (including symptoms of depression, quality of life, loneliness, and social support) on a quantitative level as well as on a qualitative level. For this purpose, animal caregivers and non–animal caregivers were surveyed online and statistically compared based on quantitative data. Additionally, the personal opinion of animal caregivers regarding the animals’ role during the pandemic was investigated using qualitative content analysis. The results show big differences between personal opinion regarding the meaning of caring for animals during the pandemic (= qualitative data) and the results of standardized measurements (= quantitative data). In this context, statistical evaluation shows no evidence that individuals benefit from the human–animal bond, and moreover, indicates that caring for an animal creates an additional burden. Nevertheless, qualitative evaluation of the personal opinion regarding the meaning of animals during the pandemic shows that most caregivers experience their animals as a positive influence on a biopsychosocial level. Looking into explanations for these results, it might be assumed that according to the “pet effect”—a term that refers to certain benefits individuals experience due to the relationship with their animals (Allen, 2003)—caregivers want to believe that their animals make life better, which is why the personal estimation of the animals’ role is positive

Increasing arterial blood pressure with norepinephrine does not improve microcirculatory blood flow: a prospective study

Introduction Our goal was to assess the effects of titration of a norepinephrine infusion to increasing levels of mean arterial pressure (MAP) on sublingual microcirculation. Methods Twenty septic shock patients were prospectively studied in two teaching intensive care units. The patients were mechanically ventilated and required norepinephrine to maintain a mean arterial pressure (MAP) of 65 mmHg. We measured systemic hemodynamics, oxygen transport and consumption (DO2 and VO2), lactate, albumin-corrected anion gap, and gastric intramucosal-arterial PCO2 difference (Delta PCO2). Sublingual microcirculation was evaluated by sidestream darkfield (SDF) imaging. After basal measurements at a MAP of 65 mmHg, norepinephrine was titrated to reach a MAP of 75 mmHg, and then to 85 mmHg. Data were analyzed using repeated measurements ANOVA and Dunnett test. Linear trends between the different variables and increasing levels of MAP were calculated. Results Increasing doses of norepinephrine reached the target values of MAP. The cardiac index, pulmonary pressures, systemic vascular resistance, and left and right ventricular stroke work indexes increased as norepinephrine infusion was augmented. Heart rate, DO2 and VO2, lactate, albumin-corrected anion gap, and Delta PCO2 remained unchanged. There were no changes in sublingual capillary microvascular flow index (2.1 +/- 0.7, 2.2 +/- 0.7, 2.0 +/- 0.8) and the percent of perfused capillaries (72 +/- 26, 71 +/- 27, 67 +/- 32%) for MAP values of 65, 75, and 85 mmHg, respectively. There was, however, a trend to decreased capillary perfused density (18 +/- 10,17 +/- 10,14 +/- 2 vessels/mm(2), respectively, ANOVA P = 0.09, linear trend P = 0.045). In addition, the changes of perfused capillary density at increasing MAP were inversely correlated with the basal perfused capillary density (R-2 = 0.95, P < 0.0001). Conclusions Patients with septic shock showed severe sublingual microcirculatory alterations that failed to improve with the increases in MAP with norepinephrine. Nevertheless, there was a considerable interindividual variation. Our results suggest that the increase in MAP above 65 mmHg is not an adequate approach to improve microcirculatory perfusion and might be harmful in some patient

Year in review in Intensive Care Medicine 2009: II. Neurology, cardiovascular, experimental, pharmacology and sedation, communication and teaching

N/

Reviewing a Decade of Change for Veterinarians: Past, Present and Gaps in Researching Stress, Coping and Mental Health Risks

Veterinary medicine is a highly complex profession that includes a very specific set of stressors that range from individual to social aspects, with several of them being relevant risk factors for a variety of conditions. The aim of this systematic review was to identify and cluster the material on stressors and suicidality in the veterinarian practice published during the last 10 years. The systematic review was conducted employing the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines using PubMed, PsycNet, Google Scholar, Medline, PsycINFO, PSYNDEX and Web of Science (2012–present) by two independent researchers resulting in the inclusion of 30 quantitative and mixed methods studies. Results of these studies on stressors were categorized using the bio-psycho-social model showing that social stressors play a prominent role. This category includes the largest number of stressors indicating that the human–human interactions in the veterinarian practice are the main stressor, underlining that training in communication techniques is a potential starting point for interventions. In addition to stressors, the results showed an additional category “psychological consequences” describing mental health disorders and suicide. Although there are still gaps in research there is enough evidence to establish more tailored health promotion measures for veterinarians