Comparison of cardiac volumetry using real-time MRI during free-breathing with standard cine MRI during breath-hold in children

Background Cardiac real-time magnetic resonance imaging (RT-MRI) provides high-quality images even during free- breathing. Difficulties in post-processing impede its use in clinical routine. Objective To demonstrate the feasibility of quantitative analysis of cardiac free-breathing RT-MRI and to compare image quality and volumetry during free-breathing RT-MRI in pediatric patients to standard breath-hold cine MRI. Materials and methods Pediatric patients (n= 22) received cardiac RT-MRI volumetry during free breathing (1.5 T; short axis; 30 frames per s) in addition to standard breath-hold cine imaging in end-expiration. Real-time images were binned retrospec- tively based on electrocardiography and respiratory bellows. Image quality and volumetry were compared using the European Cardiovascular Magnetic Resonance registry score, structure visibility rating, linear regression and Bland–Altman analyses. Results Additional time for binning of real-time images was 2 min. For both techniques, image quality was rated good to excellent. RT-MRI was significantly more robust against artifacts (P< 0.01). Linear regression revealed good correlations for the ventricular volumes. Bland–Altman plots showed a good limit of agreement (LoA) for end-diastolic volume (left ventricle [LV]: LoA -0.1 ± 2.7 ml/m2, right ventricle [RV]: LoA -1.9 ± 3.4 ml/m2), end-systolic volume (LV: LoA 0.4 ± 1.9 ml/m2, RV: LoA 0.6 ± 2.0 ml/m2), stroke volume (LV: LoA -0.5± 2.3 ml/m2, RV: LoA -2.6± 3.3 ml/m2) and ejection fraction (LV: LoA -0.5 ± 1.6%, RV: LoA -2.1 ± 2.8%). Conclusion Compared to standard cine MRI with breath hold, RT-MRI during free breathing with retrospective respiratory binning offers good image quality, reduced image artifacts enabling fast quantitative evaluations of ventricular volumes in clinical practice under physiological conditions

Sulphadoxine/pyrimethamine versus amodiaquine for treating uncomplicated childhood malaria in Gabon: A randomized trial to guide national policy

<p>Abstract</p> <p>Background</p> <p>In Gabon, following the adoption of amodiaquine/artesunate combination (AQ/AS) as first-line treatment of malaria and of sulphadoxine/pyrimethamine (SP) for preventive intermittent treatment of pregnant women, a clinical trial of SP versus AQ was conducted in a sub-urban area. This is the first study carried out in Gabon following the WHO guidelines.</p> <p>Methods</p> <p>A random comparison of the efficacy of AQ (10 mg/kg/day × 3 d) and a single dose of SP (25 mg/kg of sulphadoxine/1.25 mg/kg of pyrimethamine) was performed in children under five years of age, with uncomplicated falciparum malaria, using the 28-day WHO therapeutic efficacy test. In addition, molecular genotyping was performed to distinguish recrudescence from reinfection and to determine the frequency of the <it>dhps </it>K540E mutation, as a molecular marker to predict SP-treatment failure.</p> <p>Results</p> <p>The day-28 PCR-adjusted treatment failures for SP and AQ were 11.6% (8/69; 95% IC: 5.5–22.1) and 28.2% (20/71; 95% CI: 17.7–38.7), respectively This indicated that SP was significantly superior to AQ (<it>P </it>= 0.019) in the treatment of uncomplicated childhood malaria and for preventing recurrent infections. Both treatments were safe and well-tolerated, with no serious adverse reactions recorded. The <it>dhps </it>K540E mutation was not found among the 76 parasite isolates tested.</p> <p>Conclusion</p> <p>The level of AQ-resistance observed in the present study may compromise efficacy and duration of use of the AQ/AS combination, the new first-line malaria treatment. Gabonese policy-makers need to plan country-wide and close surveillance of AQ/AS efficacy to determine whether, and for how long, these new recommendations for the treatment of uncomplicated malaria remain valid.</p

Patients&rsquo; and Relatives&rsquo; Preferences for Outpatient and Day Care Services Within End-of-Life Care in Germany &ndash; A Discrete Choice Experiment

Beate Apolinarski,1,&ast; Lea de Jong,2,&ast; Franziska A Herbst,1 Carolin Huperz,1,3 Hanna AA Röwer,1 Nils Schneider,1 Kathrin Damm,2,&ast; Stephanie Stiel1,&ast; 1Institute for General Practice and Palliative Care, Hannover Medical School, Hannover, Germany; 2Center for Health Economics Research Hannover (CHERH), Leibniz University Hannover, Hannover, Germany; 3Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, Bielefeld, Germany&ast;These authors contributed equally to this workCorrespondence: Franziska A Herbst, Hannover Medical School, Institute for General Practice and Palliative Care, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany, Fax +49 511 532 4176, Email [email protected]: In Germany, patients with incurable chronic diseases living at home increasingly have the option of using outpatient and day care hospice and specialized palliative care services. The present study examined and compared patients’ and their relatives’ preferences for end-of-life outpatient and day care services.Patients and Methods: The study used a questionnaire integrating a discrete choice experiment. For six scenarios, participants chose between two hypothetical end-of-life care offers, described by seven attributes. The model compared place of care, frequency and duration of care and support, specialized medical palliative care, accompanied activities, and relieving patient counselling. The model also included optional overnight care and willingness to pay. Patients and the relatives of patients suffering from incurable, chronic diseases who were not yet receiving palliative care were recruited via hospitals and self-help groups (06/2021– 07/2022).Results: The results were based on data from 436 questionnaires (patients: n=263, relatives: n=173). All attributes had a statistically significant impact on choice decisions, with place of care showing the greatest importance. All respondents highly preferred care in the patient’s home over out-of-home care. Patients stressed the importance of special medical (palliative) care and valued accompanied activities, often facilitated by hospice volunteers. Relatives, but not patients, considered the frequency and duration of care highly relevant.Conclusion: The results suggest a higher demand for care in the patient’s home than for out-of-home care. Patients’ and relatives’ high preference for special medical care and the relief of family caregiver burden should be considered in the design of day care services.Keywords: palliative care, hospice care, preferences, discrete choice experiment, medical day care, ambulatory car

The macromolecular crystallography beamlines at BESSY II of the Helmholtz Zentrum Berlin Current status and perspectives

For a little over a decade now, the Macromolecular Crystallography MX group at the Helmholtz Zentrum Berlin HZB has been operating three state of the art synchrotron beamlines for MX at the BESSY II storage ring in Berlin. The three HZB MX beamlines, BL14.1, BL14.2 and BL14.3, serve a stable and growing user community of currently more than 100 independent research groups from Berlin, Germany and Europe. Every year, the beamlines provide close to 200 days of MX beamtime. Over time, the HZB MX beamlines and endstations, in particular BL14.1, have been continually developed and upgraded and, since 2010, they operate as the most productive MX beamlines in Germany. The environment of the beamlines includes various ancillary equipment as well as additional facilities, such as office space adjacent to the beamlines, a sample preparation laboratory, a safety level 1 biology laboratory HZB MX BioLab and all necessary computing resources. In this paper, the current status of the beamlines as well as the ongoing developments are describe

The initial maturation status of marmoset testicular tissues has an impact on germ cell maintenance and somatic cell response in tissue fragment culture

Successful in vitro spermatogenesis was reported using immature mouse testicular tissues in a fragment culture approach, raising hopes that this method could also be applied for fertility preservation in humans. Although maintaining immature human testicular tissue fragments in culture is feasible for an extended period, it remains unknown whether germ cell survival and the somatic cell response depend on the differentiation status of tissue. Employing the marmoset monkey (Callithrix jacchus), we aimed to assess whether the maturation status of prepubertal and peri-/pubertal testicular tissues influence the outcome of testis fragment culture. Testicular tissue fragments from 4- and 8-month-old (n = 3, each) marmosets were cultured and evaluated after 0, 7, 14, 28 and 42 days. Immunohistochemistry was performed for identification and quantification of germ cells (melanoma-associated antigen 4) and Sertoli cell maturation status (anti-Müllerian hormone: AMH). During testis fragment culture, spermatogonial numbers were significantly reduced (P < 0.05) in the 4- but not 8-month-old monkeys, at Day 0 versus Day 42 of culture. Moreover, while Sertoli cells from 4-month-old monkeys maintained an immature phenotype (i.e. AMH expression) during culture, AMH expression was regained in two of the 8-month-old monkeys. Interestingly, progression of differentiation to later meiotic stage was solely observed in one 8-month-old marmoset, which was at an intermediate state regarding germ cell content, with gonocytes as well as spermatocytes present, as well as Sertoli cell maturation status. Although species-specific differences might influence the outcome of testis fragment experiments in vitro, our study demonstrated that the developmental status of the testicular tissues needs to be considered as it seems to be decisive for germ cell maintenance, somatic cell response and possibly the differentiation potential