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"Sanchez, Nicolas"
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Diatom-mediated food web functioning under ocean artificial upwelling
Enhancing ocean productivity by artificial upwelling is evaluated as a nature-based solution for food security and climate change mitigation. Fish production is intended through diatom-based plankton food webs as these are assumed to be short and efficient. However, our findings from mesocosm experiments on artificial upwelling in the oligotrophic ocean disagree with this classical food web model. Here, diatoms did not reduce trophic length and instead impaired the transfer of primary production to crustacean grazers and small pelagic fish. The diatom-driven decrease in trophic efficiency was likely mediated by changes in nutritional value for the copepod grazers. Whilst diatoms benefitted the availability of essential fatty acids, they also caused unfavorable elemental compositions via high carbon-to-nitrogen ratios (i.e. low protein content) to which the grazers were unable to adapt. This nutritional imbalance for grazers was most pronounced in systems optimized for CO
uptake through carbon-to-nitrogen ratios well beyond Redfield. A simultaneous enhancement of fisheries production and carbon sequestration via artificial upwelling may thus be difficult to achieve given their opposing stoichiometric constraints. Our study suggest that food quality can be more critical than quantity to maximize food web productivity during shorter-term fertilization of the oligotrophic ocean.
Journal Article
Wind-driven upwelling of iron sustains dense blooms and food webs in the eastern Weddell Gyre
The Southern Ocean is a major sink of anthropogenic CO
and an important foraging area for top trophic level consumers. However, iron limitation sets an upper limit to primary productivity. Here we report on a considerably dense late summer phytoplankton bloom spanning 9000 km
in the open ocean of the eastern Weddell Gyre. Over its 2.5 months duration, the bloom accumulated up to 20 g C m
of organic matter, which is unusually high for Southern Ocean open waters. We show that, over 1997-2019, this open ocean bloom was likely driven by anomalies in easterly winds that push sea ice southwards and favor the upwelling of Warm Deep Water enriched in hydrothermal iron and, possibly, other iron sources. This recurring open ocean bloom likely facilitates enhanced carbon export and sustains high standing stocks of Antarctic krill, supporting feeding hot spots for marine birds and baleen whales.
Journal Article
Development of a screening tool to detect nutrition risk in patients with inflammatory bowel disease
Background and Objectives: Malnutrition is a known complication of Inflammatory Bowel Disease (IBD). We assessed a known screening tool, as well as developed and validated a novel screening tool, to detect nutrition risk in outpatients with IBD.
Methods and Study Design: The Saskatchewan IBD-Nutrition Risk (SaskIBD-NR Tool) was developed and administered alongside the Malnutrition Universal Screening Tool (MUST). Nutrition risk was confirmed by the IBD dietitian (RD) and gastroenterologist (GI). Agreement between screening tools and RD/GI assessment was computed using Cohen's kappa.
Results: Of the 110 patients screened, 75 (68.2%) patients had Crohn's Disease and 35 (31.8%) ulcerative colitis. Mean BMI was 26.4 kg/m2 (SD=5.8). RD/GI assessment identified 23 patients (20.9%) at nutrition risk. The SaskIBD-NR tool classified 21 (19.1%) at some nutrition risk, while MUST classified 17 (15.5%). The SaskIBD-NR tool had significant agreement with the RD/GI assessment (k 0.83, p<0.001), while MUST showed a lack of agreement (k 0.15, p=0.12). The SaskIBD-NR had better sensitivity (82.6% vs 26.1%), specificity (97.7% vs 87.4%), positive predictive value (90.5% vs 35.3%), and negative predictive value (95.5% vs 81.7%) than the MUST.
Conclusion: The SaskIBD-NR, which assesses GI symptoms, food restriction, and weight loss, adequately detects nutrition risk in IBD patients. Broader validation is required.
Journal Article
Exploring Satisfaction and Migration Intentions of Physicians in Three University Hospitals in Poland
University hospitals constitute a unique group of health care organizations which traditionally link three functions: (1) providing highly specialized services, (2) teaching activities, and (3) conducting research.
To assess the level of carrier satisfaction among physicians working in three university hospitals in Poland (1); to assess whether the physicians have the intention to migrate and what the main reasons for migration are (2); and to identify the actions that might be taken at the hospital level to mitigate physicians' intentions to migrate (3).
Cross-sectional study with both quantitative and qualitative components. In the quantitative part, an online questionnaire was distributed among physicians working in three university hospitals. A total number of 396 questionnaires were analyzed. In the qualitative part, in-depth interviews with six hospital managers were conducted and analyzed using thematic analysis.
On a scale from one \"very dissatisfied\" to six \"very satisfied\", the mean career satisfaction of physicians was 4.0 (SD = 0.74). The item with the lowest mean concerned salary level (2.8, SD = 1.41). In the sample, 34% of physicians declared intentions to migrate from Poland. The main reasons for the intention to migrate were: Better working conditions abroad, higher earnings, the ability to maintain better work-life balance, better training opportunities abroad, and problems due to a stressful current workplace. Hospital managers considered the actions that can be taken at the hospital level to mitigate physicians' migration to be specific to those focused on the working environment.
Career development opportunities and features related to the working environment are the main factors influencing physicians' satisfaction and migration intentions that can be modified at the university hospital level.
Journal Article
Incidence, clinical characteristics, risk factors and outcomes of meningoencephalitis in patients with COVID-19
We investigated the incidence, clinical characteristics, risk factors, and outcome of meningoencephalitis (ME) in patients with COVID-19 attending emergency departments (ED), before hospitalization. We retrospectively reviewed all COVID patients diagnosed with ME in 61 Spanish EDs (20% of Spanish EDs, COVID-ME) during the COVID pandemic. We formed two control groups: non-COVID patients with ME (non-COVID-ME) and COVID patients without ME (COVID-non-ME). Unadjusted comparisons between cases and controls were performed regarding 57 baseline and clinical characteristics and 4 outcomes. Cerebrospinal fluid (CSF) biochemical and serologic findings of COVID-ME and non-COVID-ME were also investigated. We identified 29 ME in 71,904 patients with COVID-19 attending EDs (0.40‰, 95%CI=0.27–0.58). This incidence was higher than that observed in non-COVID patients (150/1,358,134, 0.11‰, 95%CI=0.09–0.13; OR=3.65, 95%CI=2.45–5.44). With respect to non-COVID-ME, COVID-ME more frequently had dyspnea and chest X-ray abnormalities, and neck stiffness was less frequent (OR=0.3, 95%CI=0.1–0.9). In 69.0% of COVID-ME, CSF cells were predominantly lymphocytes, and SARS-CoV-2 antigen was detected by RT-PCR in 1 patient. The clinical characteristics associated with a higher risk of presenting ME in COVID patients were vomiting (OR=3.7, 95%CI=1.4–10.2), headache (OR=24.7, 95%CI=10.2–60.1), and altered mental status (OR=12.9, 95%CI=6.6–25.0). COVID-ME patients had a higher in-hospital mortality than non-COVID-ME patients (OR=2.26; 95%CI=1.04–4.48), and a higher need for hospitalization (OR=8.02; 95%CI=1.19–66.7) and intensive care admission (OR=5.89; 95%CI=3.12–11.14) than COVID-non-ME patients. ME is an unusual form of COVID presentation (<0.5‰ cases), but is more than 4-fold more frequent than in non-COVID patients attending the ED. As the majority of these MEs had lymphocytic predominance and in one patient SARS-CoV-2 antigen was detected in CSF, SARS-CoV-2 could be the cause of most of the cases observed. COVID-ME patients had a higher unadjusted in-hospital mortality than non-COVID-ME patients.
Journal Article
Benefits of Advanced Practice Nursing for Its Expansion in the Spanish Context
The objective of this study is to describe the impact of the Advanced Practice Nurse role on the clinical practice and patient benefit, as well as to provide reasons for its implementation and expansion in Spain. Through the scoping review method, this study has been carried out according to five thematic blocks: life quality, cost-effectiveness, health results, satisfaction, and accessibility. The critical appraisal was performed with the Critical Appraisal Skills Programme (CASP) tool and the level of evidence and strength of recommendation have been analysed following the Oxford Centre for Evidence-Based Medicine (OCEBM) system. The results show that it is possible to formally implement advanced practice nursing in the Spanish context. The analysis of the Spanish regulatory framework reveals that the generalisation of the Case Manager Nurse is the starting point for the development of advanced practice nursing in Spain. This implementation would have a positive impact on patients in terms of health results, satisfaction, and life quality, given that the advanced practice nurse performs a more effective follow-up of chronic patients with a better control of risk factors, symptoms and health outcomes, and an earlier detection of complications. Considering these results, regional governments should promote the role of the Advanced Practice Nurse to contribute to its expansion.
Journal Article
Longitudinal Trends in the Direct Costs and Health Care Utilization Ascribable to Inflammatory Bowel Disease in the Biologic Era: Results From a Canadian Population-Based Analysis
The prevalence of inflammatory bowel disease (IBD) is increasing. The total direct costs of IBD have not been assessed on a population-wide level in the era of biologic therapy.
We identified all persons with IBD in Manitoba between 2005 and 2015, with each matched to 10 controls on age, sex, and area of residence. We enumerated all hospitalizations, outpatient visits and prescription medications including biologics, and their associated direct costs. Total and per capita annual IBD-attributable costs and health care utilization (HCU) were determined by taking the difference between the costs/HCU accrued by an IBD case and their controls. Generalized linear modeling was used to evaluate trends in direct costs and Poisson regression for trends in HCU.
The number of people with IBD in Manitoba increased from 6,323 to 7,603 between 2005 and 2015. The total per capita annual costs attributable to IBD rose from $3,354 in 2005 to $7,801 in 2015, primarily driven by an increase in per capita annual anti-tumor necrosis factor costs, which rose from $181 in 2005 to $5,270 in 2015. There was a significant decline in inpatient costs for CD ($99 ± 25/yr. P < 0.0001), but not for ulcerative colitis ($8 increase ±$18/yr, P = 0.63).
The direct health care costs attributable to IBD have more than doubled over the 10 years between 2005 and 2015, driven mostly by increasing expenditures on biological medications. IBD-attributable hospitalization costs have declined modestly over time for persons with CD, although no change was seen for patients with ulcerative colitis.
Journal Article
Factors Associated with Satisfaction of Hospital Physicians: A Systematic Review on European Data
Physician satisfaction is a multidimensional concept related to many factors. Despite the wide range of research regarding factors affecting physician satisfaction in different European countries, there is a lack of literature reviews analyzing and summarizing current evidence. The aim of the article is to synthetize the literature studying the factors associated with physician satisfaction.
We searched: MEDLINE, Embase, PsycINFO, CINAHL and the Cochrane Library from January 2000 to January 2017. The eligibility criteria included: (1) target population: physicians working in European hospitals; (2) quantitative research aimed at assessing physician satisfaction and associated factors; (3) use of validated tools. We performed a narrative synthesis.
After screening 8585 records, 368 full text articles were independently checked and finally 24 studies were included for qualitative analysis. The included studies surveyed 20,000 doctors from 12 European countries. The tools and scales used in the analyzed research to measure physician satisfaction varied to a large extent. We extracted all pre-specified factors, reported as statistically significant/non-significant. Analyzed factors were divided into three groups: personal, intrinsic and contextual factors. The majority of factors are modifiable and positively associated with characteristics of contextual factors, such as work-place setting/work environment. In the group of work-place related factors, quality of management/leadership, opportunity for professional development and colleague support have been deemed statistically significant in numerous studies.
We identified more studies appraising the effect of contextual factors (such as work environment, work-place characteristics), highlighting a positive association between those factors and physician satisfaction, compared with personal and intrinsic factors. Numerous studies confirmed statistically significant associations between physician satisfaction and quality of management, professional development and colleague support/team climate. Due to the health workforce crisis, knowledge regarding physician satisfaction and associated factors is essential to healthcare managers and policy makers for more stable human resources management.
Journal Article