Stefan Wimmer

Dr. Stefan Wimmer

Universitätsklinikum Erlangen
orcid

Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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24 July 2014 in Pediatric Drugs
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Journal Article
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SWStefan Wimmer
Stefan Wimmer
WRWolfgang Rascher
Wolfgang Rascher
SMSuzanne McCarthy
Suzanne McCarthy
ANAntje Neubert
Antje Neubert

5 January 2021 in Pharmacy
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Journal Article
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JZJulia Zahn
Julia Zahn
SWStefan Wimmer
Stefan Wimmer
WRWolfgang Rödle
Wolfgang Rödle
ITIrmgard Toni
Irmgard Toni
BSBrita Sedlmayr
Brita Sedlmayr
ANAntje Neubert
Antje Neubert
Background: Off-label use is frequent in paediatrics but that does not necessarily mean that the risk-benefit ratio is negative. Nevertheless, evidence-based data is essential for safe drug therapy. In Germany, there is no publicly available compendium providing transparent, evidence-based information for paediatric pharmacotherapy to date. This work describes the development of a web-based paediatric drug information system (PDIS) for Germany and its evaluation by health care professionals (HCP). Methods: Since 2012, a PDIS is being developed by the authors and is supported by the Federal Ministry of Health since 2016. Dosing recommendations were established based on systematic literature reviews and subsequent evaluation by clinical experts. The prototype was evaluated by HCP. Based on the results, the further development was concluded. Results: 92% of HCP believed that the PDIS could improve the quality of prescribing, as currently available information is deficient. Besides the license and formulations, dosing recommendations were the most relevant modules. A dosage calculator was the most wanted improvement. To facilitate sustainability of future development, a collaboration with the Dutch Kinderformularium was established. As of 2021, the database will be available to German HCP. Conclusion: The fundamentals for a German PDIS were established, and vital steps were taken towards successful continuation.

13 November 2015 in Deutsches Ärzteblatt international
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Journal Article
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SWStefan Wimmer
Stefan Wimmer
ANAntje Neubert
Antje Neubert
WRWolfgang Rascher
Wolfgang Rascher
Proving the safety and efficacy of medicinal products and identifying their correct dosage are the responsibility of drug regulating authorities. After marketing authorization has been granted, data on rare adverse reactions and regarding the safety...

24 August 2015 in PLOS ONE
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ANAxel Newe
Axel Newe
SWStefan Wimmer
Stefan Wimmer
ANAntje Neubert
Antje Neubert
LBLinda Becker
Linda Becker
HPHans-Ulrich Prokosch
Hans-Ulrich Prokosch
TGThomas Ganslandt
Thomas Ganslandt
The analysis of electronic health records for an automated detection of adverse drug reactions is an approach to solve the problems that arise from traditional methods like spontaneous reporting or manual chart review. Algorithms addressing this task should be modeled on the criteria for a standardized case causality assessment defined by the World Health Organization. One of these criteria is the temporal relationship between drug intake and the occurrence of a reaction or a laboratory test abnormality. Appropriate data that would allow for developing or validating related algorithms is not publicly available, though. In order to provide such data, retrospective routine data of drug administrations and temporally corresponding laboratory observations from a university clinic were extracted, transformed and evaluated by experts in terms of a reasonable time relationship between drug administration and lab value alteration. The result is a data corpus of 400 episodes of normalized laboratory parameter values in temporal context with drug administrations. Each episode has been manually classified whether it contains data that might indicate a temporal correlation between the drug administration and the change of the lab value course, whether such a change is not observable or whether a decision between those two options is not possible due to the data. In addition, each episode has been assigned a concordance value which indicates how difficult it is to assess. This is the first open data corpus of a computable ground truth of temporal correlations between drug administration and lab value alterations. The main purpose of this data corpus is the provision of data for further research and the provision of a ground truth which allows for comparing the outcome of other assessments of this data with the outcome of assessments made by human experts. It can serve as a contribution towards systematic, computerized ADR detection in retrospective data. With this lab value curve data as a basis, algorithms for detecting temporal relationships can be developed, and with the classification made by human experts, these algorithms can immediately be validated. Due to the normalization of the lab value data, it allows for a generic approach rather than for specific or solitary drug/lab value combinations.

7 August 2019 in Applied Clinical Informatics
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Journal Article
Open access
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WRWolfgang Rödle
Wolfgang Rödle
SWStefan Wimmer
Stefan Wimmer
JZJulia Zahn
Julia Zahn
HPHans-Ulrich Prokosch
Hans-Ulrich Prokosch
BHBernward Hinkes
Bernward Hinkes
BSBrita Sedlmayr
Brita Sedlmayr
Background Drug therapy in pediatric patients is a complex process. Children are subject to continuous growth and variation in drug-metabolizing enzyme activity, requiring continuous adaption of dosages. In Germany, currently no publicly available database exists that provides evidence-based information on drug dosages in pediatrics. For local drug dosing support, a prototype database has been developed within the Children's Hospital, Erlangen. A user-centered development process was initiated to establish an online platform for evidence-based dosing recommendations, as well as pharmacological and pharmaceutical drug information in pediatrics. Objectives The objectives of the study were to survey the demand for such a platform and to assess the usability of the different versions of the developed system. Methods The developed prototype was evaluated in a pluralistic walkthrough with prospective end users. After a redesign, the second prototype of the online platform underwent an online usability testing based on a tailored questionnaire and the System Usability Scale (SUS) (n = 12). Results Eleven of 12 participants expressed a demand for an online platform for pediatric dosing recommendations. The majority of the participants requested the integration of extended features, such as drug–drug interaction alerts, or information on adverse effects, pharmacokinetics, and pharmacodynamics. Particularly noteworthy is the demand for an online calculator; 5 of a total of 15 participants explicitly requested a calculator for dosages (based on age, weight, body surface) and glomerular filtration rate. The usability of the second prototype was rated “good to excellent” with a median SUS of 81.25. Conclusion Local domain experts demand an online platform for pediatric dosing recommendations. The application of the user-centered design approach enabled the development of a prototype suitable for practical use. Multiple additional required functionalities have been identified, whereby the importance of an online calculator for patient–individual dosing recommendations was particularly emphasized.

24 May 2023 in Pharmacology Research & Perspectives
Verified
Journal Article
Open access
SWStefan Wimmer
Stefan Wimmer
ITIrmgard Toni
Irmgard Toni
SBSebastian Botzenhardt
Sebastian Botzenhardt
RTRegina Trollmann
Regina Trollmann
WRWolfgang Rascher
Wolfgang Rascher
ANAntje Neubert
Antje Neubert
Background: One of the most critical steps in the medication process on pediatric wards is the medical prescription. This study aims to investigate the impact of a computerized physician order entry (CPOE) system on Adverse Drug Events (ADEs) and potentially harmful ADEs (pot ADEs) in comparison with paper‐based documentation in a general pediatric ward at a German University hospital.Methods: A prospective pre–post study was conducted. All patients aged 17 years or younger were observed during the study periods (5 months pre‐ and postimplementation). Issues Regarding Medication (IRM) were identified by intensive chart review. Events were assessed regarding causality (WHO), severity (WHO; Dean & Barber for MEs), and preventability (Shumock) and classified into (pot) ADEs, (pot) Medication errors (ME), Adverse drug Reactions (ADR), and Other incidents (OI) accordingly.Results: Total of 333 patients with medication were included in the paper‐based prescribing cohort (phase I) and 320 patients with medication in the electronic prescribing cohort (phase II). In each cohort, patients received a median number of four different drugs (IQR 5 and IQR 4). A total of 3966 IRM was observed. During the hospitalization, 2.7% (n = 9) patients in phase I and 2.8% (n = 9) in phase II experienced an ADE. Potentially harmful MEs were less often observed in the cohort with electronic prescribing (n = 228 vs. n = 562). The mean number per patient significantly decreased from 1.69 to 0.71 (p < .01).Conclusion: The implementation of a CPOE system resulted in a reduction of issues regarding medication, particularly MEs with the potential to harm patients decreased significantly.