BACKGROUND: The SpO2/FiO2 is a useful oxygenation parameter with prognostic capacity in patients with ARDS. We investigated the prognostic capacity of SpO2/FiO2 for mortality in patients with ARDS due to COVID-19.METHODS: This was a post-hoc analysis of a national multicenter cohort study in invasively ventilated patients with ARDS due to COVID-19. The primary endpoint was 28-day mortality.RESULTS: In 869 invasively ventilated patients, 28-day mortality was 30.1%. The SpO2/FiO2 on day 1 had no prognostic value. The SpO2/FiO2 on day 2 and day 3 had prognostic capacity for death, with the best cut-offs being 179 and 199, respectively. Both SpO2/FiO2 on day 2 (OR, 0.66 [95%-CI 0.46-0.96]) and on day 3 (OR, 0.70 [95%-CI 0.51-0.96]) were associated with 28-day mortality in a model corrected for age, pH, lactate levels and kidney dysfunction (AUROC 0.78 [0.76-0.79]). The measured PaO2/FiO2 and the PaO2/FiO2 calculated from SpO2/FiO2 were strongly correlated (Spearman's r = 0.79).CONCLUSIONS: In this cohort of patients with ARDS due to COVID-19, the SpO2/FiO2 on day 2 and day 3 are independently associated with and have prognostic capacity for 28-day mortality. The SpO2/FiO2 is a useful metric for risk stratification in invasively ventilated COVID-19 patients.
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BACKGROUND Seclusion is an intervention widely used in Dutch mental health care. The intervention can be effective in acute situations to avert (further) aggression or self-harm. However, seclusion is also a controversial intervention that may not have any positive effect with regard to symptom improvement. In general patients report negative effects after being secluded e.g. anxiety and having had a traumatic experience.The main reason for seclusion is not manageable aggressive behaviour of a patient. Earlier studies reported several risk factors that may contribute to seclusion, regarding patients’ characteristics, but also with regard to staff characteristics, working protocols and unit characteristics. Because of unequivocally results there is the need for a longitudinal prospective study to examine staff- and unit determinants in association with seclusion.AIMS The objective of this study is to determine which nursing staff and unit characteristics are associated with seclusion following aggression in hospitalized adult psychiatric patients. We hope to create a predictive model to estimate the risk of seclusion on an acute psychiatric ward.METHODS We will conduct a prospective observational study on a closed psychiatric ward of an academic hospital. Patients are aged 18 – 65 years and are admitted when their psychiatric condition leads to an immediate threat to the patient themselves or their surroundings.All nurses on the ward are all qualified nurses and registered in the Dutch registration of healthcare professionals. They are trained every six months in techniques of verbal de-escalation and safe physical restraint. For both nurses and the patients baseline characteristics are monitored. Every shift (day, evening, night) data are gathered on the patients, nurses and unit. Data are retrieved from the electronic patient chart, including information of the Brøset Violence Checklist. Furthermore, the exchange of information among nurses is measured using the Grid instrument. Data will be analysed using multilevel regression analysis. Data will be collected for a period of 2 years, which started January 2013.RESULTS The primary endpoint in our study is the incidence of seclusion. As a secondary endpoint, the duration of the seclusion is measured. These endpoints are measured using the Argus registration system and will be linked to predictors of seclusion, with special focus on the nursing staff- and unit determinants.
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From an evidence-based perspective, cardiopulmonary exercise testing (CPX) is a well-supported assessment technique in both the United States (US) and Europe. The combination of standard exercise testing (ET) [i.e. progressive exercise provocation in association with serial electrocardiograms (ECGs), haemodynamics, oxygen saturation, and subjective symptoms] and measurement of ventilatory gas exchange amounts to a superior method to: (i) accurately quantify cardiorespiratory fitness (CRF), (ii) delineate the physiologic system(s) underlying exercise responses, which can be applied as a means to identify the exercise-limiting pathophysiological mechanism(s) and/or performance differences, and (iii) formulate function-based prognostic stratification. Cardiopulmonary ET certainly carries an additional cost as well as competency requirements and is not an essential component of evaluation in all patient populations. However, there are several conditions of confirmed, suspected, or unknown aetiology where the data gained from this form of ET is highly valuable in terms of clinical decision making.1
