Amnestically induced persistence in random walks

We study how the Hurst exponent $\alpha$ depends on the fraction $f$ of the total time $t$ remembered by non-Markovian random walkers that recall only the distant past. We find that otherwise nonpersistent random walkers switch to persistent behavior when inflicted with significant memory loss. Such memory losses induce the probability density function of the walker's position to undergo a transition from Gaussian to non-Gaussian. We interpret these findings of persistence in terms of a breakdown of self-regulation mechanisms and discuss their possible relevance to some of the burdensome behavioral and psychological symptoms of Alzheimer's disease and other dementias.Comment: 4 pages, 3 figs, subm. to Phys. Rev. Let

Practices in antenatal counseling for extremely premature infants amongst European trainees

Item does not contain fulltextThere is no international consensus on content and process regarding antenatal counseling in extreme prematurity. The need for adequate training is increasingly recognized. This descriptive study evaluates current practice in antenatal counseling amongst European trainees using an online survey. Focusing on the process, the majority of respondents did not have a medical consensus guideline. Seven percent of the trainees received some formal training. Focusing on the content, about half of the subjects did not mention any statistics about mortality. CONCLUSION: We observed wide variation in actual content and organization in antenatal counseling in Europe amongst European trainees in neonatology

Analysis of Reporting Adverse Drug Reactions in Paediatric Patients in a University Hospital in the Netherlands

AIMS: The risk to develop adverse drug reactions (ADRs) is high for paediatric patients. This is, amongst other reasons, due to the inevitable use of off-label and unlicensed medicines. Moreover, there is limited knowledge on ADRs in children. Thus, adequate recognition may be challenging. The lack of dedicated studies and the voluntary nature of pharmacovigilance systems used to gain insight into the characteristics of ADRs contribute to this problem. The goal of this study is to identify whether ADRs in paediatric patients are adequately documented by the medical team and whether they are subsequently reported to the national pharmacovigilance system. METHODS: All patients admitted to the paediatric medium care of the Radboudumc Amalia Children's hospital during 1 month, and using one or more drugs, were included. Two researchers analysed retrospectively and independently the number of possible ADRs in the medical records. The ADRs were listed per paediatric subspecialty, to evaluate any differences in documentation and reporting of the ADRs. Subsequently, the causality, severity, and seriousness of the ADRs were assessed. The ADRs were categorised by system organ class and drug class. The national pharmacovigilance centre was consulted to check if there were any reports coming from our hospital and to collect the total number of reports. RESULTS: The medical records of 301 patients were analysed, 81 patients were suffering from one or more ADRs. In total 132 suspected ADRs were found, divided among 19 different paediatric subspecialties. Numbers were too small to investigate the differences in ADR documentation. Of these found ADRs, 55% were not explicitly noted as such in the medical records by the treating physician. None of the ADRs were reported to the national pharmacovigilance centre. Most ADRs scored 'possible' in the causality assessment, were mild or moderate, and a small number were serious. The ADRs occurred in 25 different organ systems. In total 25 different drug classes were involved. CONCLUSIONS: The results of the present study show that a large number of ADRs are not registered in the medical records and are not reported to the national pharmacovigilance system. Furthermore, it is shown that the number of ADRs occurring at our centre is much higher than the number reported to the national pharmacovigilance centre. Only an average of 513 ADRs in paediatric patients are reported per year nationwide, suggesting that there is extensive underreporting

Surgical Reintervention After Failed Antireflux Surgery: A Systematic Review of the Literature

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Professionals' preferences in prenatal counseling at the limits of viability: a nationwide qualitative Dutch study

Item does not contain fulltextPrenatal counseling practices at the limits of viability do vary, and constructing a counseling framework based on guidelines, professional and parental preferences, might achieve more homogeneity. We aimed to gain insight into professionals' preferences on three domains of counseling, particularly content, organization, and decision making and their influencing factors. A qualitative, nationwide in-depth exploration among Dutch perinatal professionals by semi-structured interviews in focus groups was performed. Regarding content of prenatal counseling, preparing parents on the short-term situation (delivery room care) and revealing their perspectives on "quality of life" were considered important. Parents should be informed on the kind of decision, on the difficulty of individual outcome predictions, on survival and mortality figures, short- and long-term morbidity, and the burden of hospitalization. For organization, the making of and compliance with agreements between professionals may promote joint counseling by neonatologists and obstetricians. Supportive materials were considered useful but only when up-to-date, in addition to the discussion and with opportunity for personalization. Regarding decision making, it is not always clear to parents that a prenatal decision needs to be made and they can participate, influencing factors could be, e.g., unclear language, directive counseling, overload of information, and an immediate delivery. There is limited familiarity with shared decision making although it is the preferred model. CONCLUSION: This study gained insight into preferred content, organization, and decision making of prenatal counseling at the limits of viability and their influencing factors from a professionals' perspective. What is Known: * Heterogeneity in prenatal counseling at the limits of viability exists * Differences between preferred counseling and actual practice also exists What is New: * Insight into preferred content, organization, and decision making of prenatal periviability counseling and its influencing factors from a professionals' perspective. Results should be taken into account when performing counseling. * Particularly the understanding of true shared decision making needs to be improved. Furthermore, implementation of shared decision making in daily practice needs more attention

Effectiveness of High Fidelity Video-Assisted Real-Time Simulation: A Comparison of Three Training Methods for Acute Pediatric Emergencies

Background. Video-assisted real-time simulation (VARS) offers the possibility of developing competence in acute medicine in a realistic and safe environment. We investigated the effectiveness of the VARS model and compared it with educational methods like Problem-Based Learning (PBL) and Pediatric Advanced Life Support (PALS). Methods. 45 fourth-year medical students were randomized for three educational methods. Level of knowledge and self-efficacy were measured before and after intervention. Clinical performance was measured by a blinded observer using a video checklist of prescripted scenarios on a high-fidelity simulator. Results. Knowledge test and self-efficacy scores improved significantly (P < 0.001) without differences between educational groups. The VARS group showed significantly (P < 0.05) higher scores on both postintervention scenarios concerning structure and time. Conclusion. VARS training is an effective educational method teaching pediatric acute care skills in the undergraduate curriculum. When compared to PBL and PALS training, VARS training appears to be superior in enhancing short-term clinical performance

Time crawls when you’re not having fun: Feeling entitled makes dull tasks drag on

All people have to complete dull tasks, but individuals who feel entitled may be more inclined to perceive them as a waste of their "precious" time, resulting in the perception that time drags.This hypothesis was confirmed in three studies.In Study 1, participants with higher trait entitlement (controlling for related variables) thought dull tasks took longer to complete; no link was found for fun tasks.In Study 2, participants exposed to entitled messages thought taking a dull survey was a greater waste of time and took longer to complete.In Study 3, participants subliminally exposed to entitled words thought dull tasks were less interesting, thought they took longer to complete, and walked away faster when leaving the laboratory.Like most resources, time is a resource valued more by entitled individuals.A time-entitlement link provides novel insight into mechanisms underlying self-focus and prosocial dynamics. © 2011 by the Society for Personality and Social Psychology, Inc

Tailored or Routine Addition of an Antireflux Fundoplication in Laparoscopic Large Hiatal Hernia Repair: A Comparative Cohort Study

Contains fulltext : 98394.pdf (publisher's version ) (Open Access)BACKGROUND: There is controversy about the tailored or routine addition of an antireflux fundoplication in large hiatal hernia (type II-IV) repair. We investigated the strategy of selective addition of a fundoplication in patients with a large hiatal hernia and concomitant gastroesophageal reflux disease. METHODS: Between 2002 and 2008, 60 patients with a large hiatal hernia were evaluated preoperatively and 12 months after surgery by reflux-related symptoms, upper endoscopy, and esophageal 24-h pH monitoring. In patients with preoperatively documented gastroesophageal reflux disease, an antireflux fundoplication was added during hiatal hernia repair. RESULTS: An antireflux procedure was added in 35 patients and 25 patients underwent hiatal hernia repair only. Preoperative symptoms were improved or resolved in 31 patients (88.6%) in the group who had fundoplication and in 20 patients (87.0%) in the group who did not have fundoplication. In patients with fundoplication, esophagitis was present in 6 patients (22.2%) after surgery and abnormal esophageal acid exposure persisted in 11 (39.3%). Seven patients (38.9%) with hernia repair only developed abnormal esophageal acid exposure, and esophagitis was postoperatively generated in five (27.8%). In neither group did patients have new onset of daily heartburn or dysphagia. CONCLUSIONS: In patients with a large hiatal hernia associated with gastroesophageal reflux disease, addition of a fundoplication during hernia repair yields acceptable reduction of symptoms and does not generate symptomatic side effects. Objective control of reflux, however, is only moderate. Omission of an antireflux procedure in the absence of gastroesophageal reflux disease induced esophagitis in 28% and abnormal esophageal acid exposure in 39% of patients. Therefore, routine addition of an antireflux fundoplication should be recommended

Conservative Treatment in Diverticulitis Patients with Pericolic Extraluminal Air and the Role of Antibiotic Treatment

Background: Recently published studies advocate a conservative approach with observation and antibiotic treatment in diverticulitis patients with pericolic air on computed tomography (CT). The primary aim of this study was to assess the clinical course of initially conservatively treated diverticulitis patients with isolated pericolic air and to identify risk factors for conservative treatment failure. The secondary aim was to assess the outcome of non-antibiotic treatment. Methods: Patient data from a retrospective cohort study on risk factors for complicated diverticulitis were combined with data from the DIABOLO trial, a randomised controlled trial comparing non-antibiotic with antibiotic treatment in patients with uncomplicated diverticulitis. The present study identified all patients with Hinchey 1A diverticulitis with isolated pericolic air on CT. Pericolic air was defined as air located < 5 cm from the affected segment of colon. The primary outcome was failure of conservative management which was defined as need for percutaneous abscess drainage or emergency surgery within 30 days after presentation. A multivariable logistic regression of clinical, radiological and laboratorial parameters with respect to treatment failure was performed. Results: A total of 109 patients were included in the study. Fifty-two (48%) patients were treated with antibiotics. Nine (8%) patients failed conservative management, seven (13%) in the antibiotic treatment group and two (4%) in the non-antibiotic group (p = 0.083). Only (increased) CRP level at presentation was an independent predictor for treatment failure. Conclusions: Conservative treatment in diverticulitis patients with isolated pericolic air is a suitable treatment strategy. Moreover, non-antibiotic treatment might be reasonable in selected patients