The impact of individual perceptual and cognitive factors on collective states in a data-driven fish school model.

In moving animal groups, social interactions play a key role in the ability of individuals to achieve coordinated motion. However, a large number of environmental and cognitive factors are able to modulate the expression of these interactions and the characteristics of the collective movements that result from these interactions. Here, we use a data-driven fish school model to quantitatively investigate the impact of perceptual and cognitive factors on coordination and collective swimming patterns. The model describes the interactions involved in the coordination of burst-and-coast swimming in groups of Hemigrammus rhodostomus. We perform a comprehensive investigation of the respective impacts of two interactions strategies between fish based on the selection of the most or the two most influential neighbors, of the range and intensity of social interactions, of the intensity of individual random behavioral fluctuations, and of the group size, on the ability of groups of fish to coordinate their movements. We find that fish are able to coordinate their movements when they interact with their most or two most influential neighbors, provided that a minimal level of attraction between fish exist to maintain group cohesion. A minimal level of alignment is also required to allow the formation of schooling and milling. However, increasing the strength of social interactions does not necessarily enhance group cohesion and coordination. When attraction and alignment strengths are too high, or when the heading random fluctuations are too large, schooling and milling can no longer be maintained and the school switches to a swarming phase. Increasing the interaction range between fish has a similar impact on collective dynamics as increasing the strengths of attraction and alignment. Finally, we find that coordination and schooling occurs for a wider range of attraction and alignment strength in small group sizes.

Impact of a dTcaP booster vaccine awareness campaign initiated by the French national health insurance for adults aged 25 years in 2021.

BACKGROUND: Vaccination schedules differ from country to country. In France, the diphtheria, tetanus, pertussis, poliomyelitis (dTcaP) booster vaccine coverage for adults aged 25 has been lower than those recommended. We evaluated the impact of an awareness campaign undertaken by the French national health insurance system in 2021. METHODS: A randomized, controlled study with adults residing in the Ardennes region was conducted to evaluate the effect on vaccine coverage of the booster vaccine reminder campaign carried out via letter and/or email and/or SMS. The randomization unit was the municipal administrative area (canton). Ten cantons were grouped into the intervention group (INT) and nine were the control group (CON). Outcomes were the booster vaccine delivery and the consultation of a general practitioner (GP) within 12 months (since the French national health insurance running the campaign suggested patients to consult their GP). RESULTS: A total of 1,975 adults were included (INT: 67.3% vs. CON: 32.7%). Of them, 331 received a booster vaccine (INT: 17.4% vs. CON: 15.5%; p = 0.29), and 1,442 consulted a GP (INT: 73.7% vs. CON: 76.8%; p = 0.14). Those who consulted a GP had more frequent vaccine delivery (INT: 19.1% vs. CON: 10.5%; p < 0.0001). CONCLUSIONS: This study found that the awareness campaign run by the French national health insurance did not improve the uptake of the dTcaP booster and that there was a low rate of vaccinated adults aged 25 years. A GP consultation was associated with dTcaP booster vaccine delivery which may show that there is a need of involving GPs in vaccination follow-ups. Patients recognize GPs as providers of credible information and they may play a key role in individualized preventive healthcare actions. Systematic consultations with GPs for follow-up could be proposed to insured adults aged 25 years in the future.

Perceptions of general practitioners towards the services provided by advanced practice nurses: a cross-sectional survey in France.

BACKGROUND: New healthcare professions are emerging due to scarce medical resources. The appearance of a new healthcare profession, advanced practice nurses (APNs), has raised questions about how general practitioners interrelate with them as primary care providers. The objective of this study was to explore the perceptions general practitioners have towards the services rendered by APNs to patients, to general practice and the role they play in the healthcare system. METHODS: A survey-based, cross-sectional study was conducted throughout the Grand Est region of France which covers 57,333km2 and has a population of approximately 5,562,651. The survey was compiled using pre-existing questionnaires and was carried out from July to September 2022 via email. Variables collected were rate of acceptability and socio-demographic characteristics. RESULTS: In total, 251 responses were included. The mean age of general practitioners was 41.7 years, most were women (58.2%) and worked in rural areas of the region (53.8%). Over 80% of respondents practiced in group structures (defined as either multi-professional health centers (n = 61) or in group practices (n = 143)). Most respondents (94.0%) were familiar with the APN profession and did not consider that APNs improved access to care (55.8%, percent of responders with score ≤ 3/10). Moreover, most did not believe that APNs were useful as a primary care provider for patients (61.8%). However, being a member of a territorialized healthcare community, known as Communautés Professionnelles Territoriales de Santé (CPTS), was associated with a positive appraisal of APNs' services (OR = 2.116, 95%CI: 1.223 to 3.712; p = 0.007). CONCLUSIONS: Encouraging shared and networked practice within a healthcare community may promote a positive perception of new actors. Further studies need to be conducted to show whether the integration of APNs into healthcare networks improves quality of care.

Prospective, observational study of the impact of finger food on the quality of nutrition evaluated by the simple evaluation of food intake (SEFI) in nursing home residents.

INTRODUCTION: Finger food is a type of meal that can be eaten without cutlery, and may, therefore, be easier to consume for patients with cognitive disorders. The objective of this study was to assess whether finger food increased the quantity of food ingested among older nursing home residents. The secondary objectives were to evaluate satisfaction after meals and costs associated with the meals. METHODS: This was a single-center prospective study conducted on paired observations, comparing food intake observed during three finger food meals vs. three "control" meals (standard meals), for the same residents, in a public nursing home, from 21 April to 18 June 2021. RESULTS: A total of 266 meals were evaluated for 50 residents. The mean intake (simple evaluation of food intake) score was 40.7 ± 1.7 out of 50 with finger food, and 39.0 ± 1.5 for standard meals. Finger food was associated with a higher probability of an intake score ≥ 40 (odds ratio [OR] 1.91 (95% CI 1.15-3.18; p = 0.01). The difference in satisfaction scores following the meals did not reach statistical significance: 3.86 (SD 1.19) vs. 3.69 (SD 1.11) for the finger food and standard meals, respectively; p = 0.2. Finger foods had an excess cost of 49% compared to a standard meal. CONCLUSION: The occasional or seasonal (rather than systematic) use of these meals seems to be a valid option to reintroduce novelty and pleasure into the residents' diet. However, potential adopters should be aware that the finger food meals were 49% more expensive than standard meals.

Association between hospital admission either directly or via the emergency department, and readmission rates at 30 days in older adults in two rural hospitals: a retrospective cohort study.

INTRODUCTION: Older patients are frequently re-admitted to the hospital after attending the emergency department (ED). We investigated whether direct admission to the hospital was associated with a lower risk of readmission at 30 days compared to admission via the ED, in patients aged ≥ 75 years. METHODS: Retrospective multicenter cohort study from 01/01/2018 to 31/12/2019, including patients aged ≥ 75 years from two hospitals. Patients admitted directly were matched 1:1 with patients admitted via the ED for center, age category, sex, major diagnosis category, type of stay (medical/surgical), and severity. We compared readmission at 30 days (primary outcome) and length of stay (secondary outcome) between groups. RESULTS: A total of 1486 matched patients with an available outcome measure were included for analysis. We observed no significant difference in 30-day readmission rate between those admitted directly (102/778, 13.1%) and those admitted via the ED (87/708, 12.3%, p = 0.63). There was a significant difference in length of stay between both groups: median 5 days [Q1-Q3: 2-8] vs 6 days [2-11] for direct and ED admissions, respectively (effect size: 0.11, p < 0.001). By multivariate analysis, only moderate to severe denutrition was associated with the risk of readmission at 30 days (Odds Ratio 2.133, 95% Confidence Interval 1.309-3.475). CONCLUSION: The mode of entry to the hospital of patients aged 75 years and older was not associated with the risk of readmission at 30 days. However, those admitted directly had a significantly shorter length of stay than those admitted via the ED.

Heterogeneity of patients with functional/dissociative seizures: Three multidimensional profiles.

OBJECTIVE: Current concepts highlight the neurological and psychological heterogeneity of functional/dissociative seizures (FDS). However, it remains uncertain whether it is possible to distinguish between a limited number of subtypes of FDS disorders. We aimed to identify profiles of distinct FDS subtypes by cluster analysis of a multidimensional dataset without any a priori hypothesis. METHODS: We conducted an exploratory, prospective multicenter study of 169 patients with FDS. We collected biographical, trauma (childhood and adulthood traumatic experiences), semiological (seizure characteristics), and psychopathological data (psychiatric comorbidities, dissociation, and alexithymia) through psychiatric interviews and standardized scales. Clusters were identified by the Partitioning Around Medoids method. The similarity of patients was computed using Gower distance. The clusters were compared using analysis of variance, chi-squared, or Fisher exact tests. RESULTS: Three patient clusters were identified in this exploratory, hypothesis-generating study and named on the basis of their most prominent characteristics: A "No/Single Trauma" group (31.4%), with more male patients, intellectual disabilities, and nonhyperkinetic seizures, and a low level of psychopathology; A "Cumulative Lifetime Traumas" group (42.6%), with clear female predominance, hyperkinetic seizures, relatively common comorbid epilepsy, and a high level of psychopathology; and A "Childhood Traumas" group (26%), commonly with comorbid epilepsy, history of childhood sexual abuse (75%), and posttraumatic stress disorder, but also with a high level of anxiety and dissociation. SIGNIFICANCE: Although our cluster analysis was undertaken without any a priori hypothesis, the nature of the trauma history emerged as the most important differentiator between three common FDS disorder subtypes. This subdifferentiation of FDS disorders may facilitate the development of more specific therapeutic programs for each patient profile.

Impact of radiation therapy on artificial urinary sphincter implantation in male patients: A multicenter study.

AIMS: To evaluate the impact of an history of radiation therapy on the outcomes of artificial urinary sphincter (AUS) implantation in male patients. METHODS: The charts of all patients who underwent AUS implantation for stress urinary incontinence (SUI) after prostate surgery in thirteen centers between 2004 and 2020 were retrospectively reviewed. We excluded patients with neurogenic SUI. Continence rates and incidence of complications, revision and cuff erosion were evaluated. The outcomes in irradiated men were compared to those of non irradiated men. RESULTS: A total of 1277 patients who had an AUS met the inclusion criteria with a median age of 70 years, of which 437 had an history of prior radiotherapy. There was no difference in comorbidities. In irradiated patients, postoperative social continence, urethral atrophy and infection rates were respectively 75.6%, 2.4% and 9.5% and 76.8%, 5.4%, and 5.8% in nonirradiated men (respectively, p = 0.799, p = 0.128, p = 0.148). There were more urethral erosion in irradiated male patients. After a mean follow up of 36.8 months, the explantation free survival was poorer in irradiated patients (p = 0.001). CONCLUSION: These data suggest that pelvic radiotherapy before AUS adversely affect device survival with and increased greater occurrence of infection-erosion and therefore of explantation.

Duration of palliative care involvement and immunotherapy treatment near the end of life among patients with cancer who died in-hospital.

BACKGROUND: Immune checkpoint inhibitors (ICIs) have revolutionised cancer treatment, but their use near the end of life in patients with advanced cancer is poorly documented. This study investigated the association between administration of ICI therapy in the last month of life and the duration of involvement of the palliative care (PC) team, among patients with advanced cancer who died in-hospital. METHODS: In a retrospective, multicentre study, we included all patients who died in 2018 of melanoma, head and neck carcinoma, non-small cell lung cancer or urothelial or renal cancer, in 2 teaching hospitals and one community hospital in France. The primary outcome was the association between ICI therapy in the last month of life and duration of involvement of the PC team in patient management. RESULTS: Among 350 patients included, 133 (38%) received anti-cancer treatment in the last month of life, including 71/133 (53%) who received ICIs. A total of 207 patients (59%) received palliative care, only 127 (36%) 30 days before death. There was a significant association between ongoing ICI therapy in the last month of life and shorter duration of PC management (p = 0.04). Receiving ICI therapy in the last month of life was associated with an increased risk of late PC initiation by multivariate regression analysis (hazard ratio 1.668; 95% CI 1.022-2.722). CONCLUSION: ICI therapy is frequently used close to the end of life in patients with advanced cancer. Innovative new anti-cancer treatments should not delay PC referral. Improved collaboration between PC and oncological teams is needed to address this issue.

A qualitative study of the perception of nursing home practitioners about the implementation of quality indicators for drug consumption in nursing homes.

INTRODUCTION: Nursing homes (NHs) are an ideal environment in which to implement interventions aimed at reducing inappropriate prescriptions. Quality indicators (QIs) may be useful to standardize practices, but it is unclear how they mediate change. In the framework of a quantitative study aimed at reducing the prescription of anticholinergic drugs among NH residents using QIs, we performed a qualitative study to describe the investigators' perception of the utility of QIs. METHODS: Qualitative study using focus group methodology. Focus groups were recorded and transcribed, and analyzed by thematic analysis. Participants were purposefully recruited from among the medical directors of the NHs in the quantitative study. RESULTS: Five medical directors participated in two focus group meetings. The main themes to emerge were: (1) communication is key to introducing new practices and achieving lasting uptake; (2) improved coordination and communication provided useful information to help interpret the quantitative results observed: e.g., participants reported that they were able to obtain contextual and patient-specific information that explained why some prescribers had consistently, but justifiably "poor" performance on the quantitative indicators; (3) negative aspects reported included reluctance to change among prescribers and the tendency to shirk responsibility. CONCLUSION: From the point of view of medical directors of NHs participating in an interventional program to reduce inappropriate prescriptions of anticholinergic drugs, the main factor driving the success of the program was communication, which is key to achieving adherence. Improved communication provides useful insights into the reasons why no quantitative reduction is observed in objective quality indicators.

[Management of suicidal crisis in general practice: evaluation of care practices according to patient age]. / Crise suicidaire, évaluation des pratiques en médecine générale selon l'âge du patient.

Nearly 800,000 people die by suicide each year worldwide. Up to 75% of suicidal patients consulted their general practitioner in the months preceding their attempt. A study, conducted among 167 practitioners in Champagne-Ardenne in 2016-2017, aims to evaluate the practices of general practitioners in the management of suicidal crisis, particularly according to the age of the patient. It provides elements for reflection on their role in suicide prevention.

Predictive factors of diagnostic and therapeutic divergence in a nationwide cohort of patients seeking second medical opinion.

OBJECTIVES: The aim of this study was to describe the profile of patients who sought a second medical opinion (SMO) on their therapeutic or diagnostic strategy using nationwide data from a French physician network dedicated to SMOs. METHODS: An observational cohort study was conducted and the study population consisted of patients residing in France or in the French overseas territories who submitted a request for an SMO through a dedicated platform between January 2016 and October 2020. Patient characteristics were compared between convergent and divergent SMOs. The divergent rate for all patients excluding those with mental diseases were described. Logistic regression was used to estimate the probability of a divergent SMO according to patient characteristics. RESULTS AND DISCUSSION: In total, 1,552 adult patients over several French regions were included. The divergence rate was 32.3 % (n = 502 patients). Gynecological [Odds Ratio (OR) and 95 % CI: 5.176 (3.154 to 8.494)], urological [OR 4.246 (2.053 to 8.782)] and respiratory diseases [OR 3.639 (1.357 to 9.758)] had the highest probability of a divergent SMO. Complex cases were also associated with a significantly higher risk of a divergent opinion [OR 2.78 (2.16 to 3.59)]. Age, sex, region and profession were not found to be predictive of a divergent second opinion. CONCLUSIONS: Policymakers should encourage new research on patient outcomes such as mortality and hospitalization rates after a SMO. When proven effective, SMO networks will have the potential to benefit from specific public funding or even play a key role in national healthcare quality improvement programs.

Making sense of the French public hospital system: a network-based approach to hospital clustering using unsupervised learning methods.

BACKGROUND: Hospitals in the public and private sectors tend to join larger organizations to form hospital groups. This increasingly frequent mode of functioning raises the question of how countries should organize their health system, according to the interactions already present between their hospitals. The objective of this study was to identify distinctive profiles of French hospitals according to their characteristics and their role in the French hospital network. METHODS: Data were extracted from the national hospital database for year 2016. The database was restricted to public hospitals that practiced medicine, surgery or obstetrics. Hospitals profiles were determined using the k-means method. The variables entered in the clustering algorithm were: the number of stays, the effective diversity of hospital activity, and a network-based mobility indicator (proportion of stays followed by another stay in a different hospital of the same Regional Hospital Group within 90 days). RESULTS: Three hospital groups were identified by the clustering algorithm. The first group was constituted of 34 large hospitals (median 82,100 annual stays, interquartile range 69,004 - 117,774) with a very diverse activity. The second group contained medium-sized hospitals (with a median of 258 beds, interquartile range 164 - 377). The third group featured less diversity regarding the type of stay (with a mean of 8 effective activity domains, standard deviation 2.73), a smaller size and a higher proportion of patients that subsequently visited other hospitals (11%). The most frequent type of patient mobility occurred from the hospitals in group 2 to the hospitals in group 1 (29%). The reverse direction was less frequent (19%). CONCLUSIONS: The French hospital network is organized around three categories of public hospitals, with an unbalanced and disassortative patient flow. This type of organization has implications for hospital planning and infectious diseases control.

Being useful among persons aged over 65: social representations from a cross-sectional European study.

BACKGROUND: There is a compelling need to prepare our societies and healthcare systems to deal with the oncoming wave of population ageing. The majority of older persons maintain a desire to be valued and useful members of society and of their social networks. AIMS: We sought to investigate the perception of usefulness among persons aged 65 years and over in four European countries. METHODS: We performed a cross-sectional survey with a representative sample of individuals aged 65 years or older from the population of retired persons (including recently retired persons and oldest-old individuals) from 4 European countries selected using quota sampling. In February 2016, an internet questionnaire was sent to all selected individuals. The characteristics used for the quota sampling method were sex, age, socio-professional category, region, city size, number of persons in household, autonomy, marital status, place of residence, income and educational status. The questionnaire contained 57 questions. Sociodemographic characteristics were recorded. Responses were analysed with principal components analysis (PCA). RESULTS: A total of 4025 persons participated; 51% were males, and 70% were aged 65-75 years. PCA identified six classes of individuals, of which two classes (Classes 2 and 3) were characterized by more socially isolated individuals with little or no sense of usefulness, low self-esteem and a poor sense of well-being. These two classes accounted for almost 20% of the population. Younger and more autonomous classes reported a more salient sense of usefulness. CONCLUSIONS: The loss of the sense of usefulness is associated with dissatisfaction with life and a loss of pleasure, and persons with profiles corresponding to Classes 2 and 3 should, therefore, be targeted for interventions aimed at restoring social links.

No impact of a prescription booklet on medication consumption in nursing home residents from 2011 to 2014: a controlled before-after study.

BACKGROUND: Older persons are particularly exposed to adverse events from medication. Among the various strategies to reduce polypharmacy, educational approaches have shown promising results. We aimed to evaluate the impact on medication consumption, of a booklet designed to aid physicians with prescriptions for elderly nursing home residents. METHODS: Among 519 nursing homes using an electronic pill dispenser, we recorded the daily number of times that a drug was administered for each resident, over a period of 4 years. The intervention group comprised 113 nursing homes belonging to a for-profit geriatric care provider that implemented a booklet delivered to prescribers and pharmacists and specifically designed to aid with prescriptions for elderly nursing home residents. The remaining 406 nursing homes where no such booklet was introduced comprised the control group. Data were derived from electronic pill dispensers. The effect of the intervention on medication consumption was assessed with multilevel regression models, adjusted for nursing home status. The main outcomes were the average daily number of times that a medication was administered and the number of drugs with different presentation identifier codes per resident per month. RESULTS: 96,216 residents from 519 nursing homes were included between 1 January 2011 and 31 December 2014. The intervention group and the control group both decreased their average daily use of medication (- 0.05 and - 0.06). The booklet did not have a statistically significant effect (exponentiated difference-in-differences coefficient 1.00, 95% confidence interval 0.99-1.02, P = .45). CONCLUSION: We observed an overall decrease in medication consumption in both the control and intervention groups. Our analysis did not provide any evidence that this reduction was related to the use of the booklet. Other factors, such as national policy or increased physician awareness, may have contributed to our findings.

Building a telepalliative care strategy in nursing homes: a qualitative study with mobile palliative care teams.

BACKGROUND: Despite increasing use of telemedicine in the field of palliative care, studies about the best circumstances and processes where it could replace face-to-face interaction are lacking. This study aimed to: (1) identify situations that are most amenable to the use of telemedicine for the provision of palliative care to patients in nursing homes; and (2) understand how telemedicine could best be integrated into the routine practice of mobile palliative care teams. METHODS: A qualitative study based on semi-structured focus groups (n = 7) with professionals (n = 33) working in mobile palliative care teams in France. RESULTS: Between June and July 2019, 7 mobile palliative care teams participated in one focus group each. Using thematic analysis, we found that telemedicine use in palliative care is about navigating between usual and new practices. Several influencing factors also emerged, which influence the use of telemedicine for palliative care, depending on the situation. Finally, we built a use-case model of palliative care to help mobile palliative care teams identify circumstances where telemedicine could be useful, or not. CONCLUSIONS: The potential utility of telemedicine for delivering palliative care in nursing homes largely depends on the motive for calling on the mobile palliative care team. Requests regarding symptoms may be particularly amenable to telemedicine, whereas psycho-social distress may not. Further studies are warranted to assess the impact of influencing factors on real-life palliative care practices. Telemedicine could nonetheless be a useful addition to the mobile palliative care teams' armamentarium.

The prediction of hospital length of stay using unstructured data.

OBJECTIVE: This study aimed to assess the performance improvement for machine learning-based hospital length of stay (LOS) predictions when clinical signs written in text are accounted for and compared to the traditional approach of solely considering structured information such as age, gender and major ICD diagnosis. METHODS: This study was an observational retrospective cohort study and analyzed patient stays admitted between 1 January to 24 September 2019. For each stay, a patient was admitted through the Emergency Department (ED) and stayed for more than two days in the subsequent service. LOS was predicted using two random forest models. The first included unstructured text extracted from electronic health records (EHRs). A word-embedding algorithm based on UMLS terminology with exact matching restricted to patient-centric affirmation sentences was used to assess the EHR data. The second model was primarily based on structured data in the form of diagnoses coded from the International Classification of Disease 10th Edition (ICD-10) and triage codes (CCMU/GEMSA classifications). Variables common to both models were: age, gender, zip/postal code, LOS in the ED, recent visit flag, assigned patient ward after the ED stay and short-term ED activity. Models were trained on 80% of data and performance was evaluated by accuracy on the remaining 20% test data. RESULTS: The model using unstructured data had a 75.0% accuracy compared to 74.1% for the model containing structured data. The two models produced a similar prediction in 86.6% of cases. In a secondary analysis restricted to intensive care patients, the accuracy of both models was also similar (76.3% vs 75.0%). CONCLUSIONS: LOS prediction using unstructured data had similar accuracy to using structured data and can be considered of use to accurately model LOS.

Motivations of French Physicians to Perform Teleconsultations During COVID-19: A Mixed-Method Study.

Background: Teleconsultations have been an indispensable part of the public health armamentarium during the COVID-19 crisis. Many physicians replaced face-to-face consultations with teleconsultations for the very first time. This study aimed to understand telemedicine uses by physicians during the lockdown period and explain the changes in their teleconsultation practices after the reopening of an outpatient department. Methods: A mixed-method analysis was used. First, a quantitative study was conducted with a retrospective analysis of the ratio of all teleconsultations and physical consultations between January 1 and July 31, 2020. Second, semidirective interviews were undertaken with physicians to better understand the dynamics of teleconsultation use. Results: In total, 28 physicians practiced 603 teleconsultations over the study period. The rate of teleconsultations was 0.2% before the lockdown (January 1 to March 15, 2020), reaching 19.5% during the lockdown (April 2020), and decreasing to 8.4% at the reopening of the physical outpatient facilities. Based on the dynamics of their teleconsultation uses, four medical departments were selected for the qualitative study component (neurology, urology, pneumology, and anesthesiology). From the semistructured interviews, the main uses of telemedicine were for patients living with "chronic but under control" conditions that received follow-ups. Physicians also identified practices to improve patient empowerment and nurse autonomy. The results of the anesthesiology department showed that teleconsultations must be more codified to meet the same standards of quality as face-to-face consultations. Conclusion: The COVID-19 outbreak and lockdown period triggered a wider use of teleconsultations and have allowed physicians to think about new uses and opportunities.

A Nano-Emulsion Platform Functionalized with a Fully Human scFv-Fc Antibody for Atheroma Targeting: Towards a Theranostic Approach to Atherosclerosis.

Atherosclerosis is at the onset of the cardiovascular diseases that are among the leading causes of death worldwide. Currently, high-risk plaques, also called vulnerable atheromatous plaques, remain often undiagnosed until the occurrence of severe complications, such as stroke or myocardial infarction. Molecular imaging agents that target high-risk atheromatous lesions could greatly improve the diagnosis of atherosclerosis by identifying sites of high disease activity. Moreover, a "theranostic approach" that combines molecular imaging agents (for diagnosis) and therapeutic molecules would be of great value for the local management of atheromatous plaques. The aim of this study was to develop and characterize an innovative theranostic tool for atherosclerosis. We engineered oil-in-water nano-emulsions (NEs) loaded with superparamagnetic iron oxide (SPIO) nanoparticles for magnetic resonance imaging (MRI) purposes. Dynamic MRI showed that NE-SPIO nanoparticles decorated with a polyethylene glycol (PEG) layer reduced their liver uptake and extended their half-life. Next, the NE-SPIO-PEG formulation was functionalized with a fully human scFv-Fc antibody (P3) recognizing galectin 3, an atherosclerosis biomarker. The P3-functionalized formulation targeted atheromatous plaques, as demonstrated in an immunohistochemistry analyses of mouse aorta and human artery sections and in an Apoe-/- mouse model of atherosclerosis. Moreover, the formulation was loaded with SPIO nanoparticles and/or alpha-tocopherol to be used as a theranostic tool for atherosclerosis imaging (SPIO) and for delivery of drugs that reduce oxidation (here, alpha-tocopherol) in atheromatous plaques. This study paves the way to non-invasive targeted imaging of atherosclerosis and synergistic therapeutic applications.

Hospital Length of Stay Reduction Over Time and Patient Readmission for Severe Adverse Events Following Surgery.

OBJECTIVE: The aim of the study was to investigate whether patients who undergo surgery in hospitals experiencing significant length of stay (LOS) reductions over time are exposed to a higher risk of severe adverse events in the postoperative period. SUMMARY BACKGROUND DATA: Surgical care innovation has encouraged hospitals to shorten LOS under financial pressures with uncertain impact on patient outcomes. METHODS: We selected all patients who underwent elective colectomy or urgent hip fracture repair in French hospitals between 2013 and 2016. For each procedure, hospitals were categorized into 3 groups according to variations in their median LOS as follows: major decrease, moderate decrease, and no decrease. These groups were matched using propensity scores based on patients' and hospitals' potential confounders. Potentially avoidable readmission for severe adverse events and death at 6 months were compared between groups using Cox regressions. RESULTS: We considered 98,713 patients in 540 hospitals for colectomy and 206,812 patients in 414 hospitals for hip fracture repair before matching. After colectomy, patient outcomes were not negatively impacted when hospitals reduced their LOS [hazard ratio (95% confidence interval): 0.93 (0.78-1.10)]. After hip fracture repair, patients in hospitals with major decreases in LOS had a higher risk of severe adverse events [1.22 (1.11-1.34)] and death [1.17 (1.04-1.32)]. CONCLUSIONS: Patients who underwent surgical procedures in hospitals experiencing major decreases in LOS were demonstrated worse postoperative outcomes after urgent hip fracture repair and not after elective colectomy. Development of care bundles to enhance recovery after emergency surgeries may allow better control of LOS reduction and patient outcomes.

Influence of trends in hospital volume over time on patient outcomes for high-risk surgery.

BACKGROUND: The "practice makes perfect" concept considers the more frequent a hospital performs a procedure, the better the outcome of the procedure. We aimed to study this concept by investigating whether patient outcomes improve in hospitals with a significantly increased volume of high-risk surgery over time and whether a learning effect existed at the individual hospital level. METHODS: We included all patients who underwent one of 10 digestive, cardiovascular and orthopaedic procedures between 2010 and 2014 from the French nationwide hospitals database. For each procedure, we identified three groups of hospitals according to volume trend (increased, decreased, or no change). In-hospital mortality, reoperation, and unplanned hospital readmission within 30 days were compared between groups using Cox regressions, taking into account clustering of patients within hospitals and potential confounders. Individual hospital learning effect was investigated by considering the interaction between hospital groups and procedure year. RESULTS: Over 5 years, 759,928 patients from 694 hospitals were analysed. Patients' mortality in hospitals with procedure volume increase or decrease over time did not clearly differ from those in hospitals with unchanged volume across the studied procedures (e.g., Hazard Ratios [95%] of 1.04 [0.93-1.17] and 1.08 [0.97-1.21] respectively for colectomy). Furthermore, patient outcomes did not improve or deteriorate in hospitals with increased or decreased volume of procedures over time (e.g., 1.01 [0.95-1.08] and 0.99 [0.92-1.05] respectively for colectomy). CONCLUSIONS: Trend in hospital volume over time did not appear to influence patient outcomes based on real-world data. TRIAL REGISTRATION: NCT02788331, June 2, 2016.