Rainer Dziewas
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Rainer Dziewas has a total of 51 co-authors. Here are the top co-authors by number of shared publications:
- Tobias Warnecke
Department of Neurology and Neurorehabilitation, Klinikum Osnabrück-Academic Teaching Hospital of the University of Münster, Am Finkenhügel 1, 49076, Osnabrück, Germany.
4 shared publications A. Riecker
Universitäts- und Rehabilitationsklinikum Ulm RKU
1 shared publication- Andreas H Leischker
Klinik für Allgemeine Innere Medizin und Altersmedizin, Alexianer Krefeld GmbH
1 shared publication B. Lindner-Pfleghar
Universitäts- und Rehabilitationsklinikum Ulm RKU
1 shared publication- Bendix Labeit
Department of Neurology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
1 shared publication C. Helfer
Vivantes Klinikum Neukölln
1 shared publication
Latest Publications
- Open Access
Pre- and Post-Surgical Dysphagia in Adults with Tumors of the Posterior Fossa: A Prospective Blinded Study
Background: While swallowing disorders are frequent sequela following posterior fossa tumor (PFT) surgery in children, data on dysphagia frequency, severity, and outcome in adults are lacking. The aim of this study was to investigate dysphagia before and after surgical removal of PFT. Additionally, we tried to identify clinical predictors for postsurgical swallowing disorders. Furthermore, this study explored the three-month outcome of dysphagic patients. Methods: In a cohort of patients undergoing PFT surgery, dysphagia was prospectively assessed pre- and postoperatively using fiberoptic endoscopic evaluation of swallowing. Patients with severe dysphagia at discharge were re-evaluated after three months. Additionally, clinical and imaging data were collected to identify predictors for post-surgical dysphagia. Results: We included 26 patients of whom 15 had pre-operative swallowing disorders. After surgery, worsening of pre-existing dysphagia could be noticed in 7 patients whereas improvement was observed in 2 and full recovery in 3 subjects. New-onset dysphagia after surgery occurred in a minority of 3 cases. Postoperatively, 47% of dysphagic patients required nasogastric tube feeding. Re-evaluation after three months of follow-up revealed that all dysphagic patients had returned to full oral intake. Conclusion: Dysphagia is a frequent finding in patients with PFT already before surgery. Surgical intervention can infer a deterioration of impaired swallowing function placing affected patients at temporary risk for aspiration. In contrast, surgery can also accomplish beneficial results resulting in both improvement and full recovery. Overall, our findings show the need of early dysphagia assessment to define the safest feeding route for the patient.
Open AccessPre- and Post-Surgical Dysphagia in Adults with Tumors of the Posterior Fossa: A Prospective Blinded Study
Background: While swallowing disorders are frequent sequela following posterior fossa tumor (PFT) surgery in children, data on dysphagia frequency, severity, and outcome in adults are lacking. The aim of this study was to investigate dysphagia before and after surgical removal of PFT. Additionally, we tried to identify clinical predictors for postsurgical swallowing disorders. Furthermore, this study explored the three-month outcome of dysphagic patients. Methods: In a cohort of patients undergoing PFT surgery, dysphagia was prospectively assessed pre- and postoperatively using fiberoptic endoscopic evaluation of swallowing. Patients with severe dysphagia at discharge were re-evaluated after three months. Additionally, clinical and imaging data were collected to identify predictors for post-surgical dysphagia. Results: We included 26 patients of whom 15 had pre-operative swallowing disorders. After surgery, worsening of pre-existing dysphagia could be noticed in 7 patients whereas improvement was observed in 2 and full recovery in 3 subjects. New-onset dysphagia after surgery occurred in a minority of 3 cases. Postoperatively, 47% of dysphagic patients required nasogastric tube feeding. Re-evaluation after three months of follow-up revealed that all dysphagic patients had returned to full oral intake. Conclusion: Dysphagia is a frequent finding in patients with PFT already before surgery. Surgical intervention can infer a deterioration of impaired swallowing function placing affected patients at temporary risk for aspiration. In contrast, surgery can also accomplish beneficial results resulting in both improvement and full recovery. Overall, our findings show the need of early dysphagia assessment to define the safest feeding route for the patient.
- Top Cited PapersOpen Access
- 8 July 2020
- Published by MDPI AG in Journal of Clinical Medicine
- Vol. 9 (7) , 2150
The Impact of Dysphagia in Myositis: A Systematic Review and Meta-Analysis
(1) Background: Dysphagia is a clinical hallmark and part of the current American College of Rheumatology/European League Against Rheumatism (ACR/EULAR) diagnostic criteria for idiopathic inflammatory myopathy (IIM). However, the data on dysphagia in IIM are heterogenous and partly conflicting. The aim of this study was to conduct a systematic review on epidemiology, pathophysiology, outcome and therapy and a meta-analysis on the prevalence of dysphagia in IIM. (2) Methods: Medline was systematically searched for all relevant articles. A random effect model was chosen to estimate the pooled prevalence of dysphagia in the overall cohort of patients with IIM and in different subgroups. (3) Results: 234 studies were included in the review and 116 (10,382 subjects) in the meta-analysis. Dysphagia can occur as initial or sole symptom. The overall pooled prevalence estimate in IIM was 36% and with 56% particularly high in inclusion body myositis. The prevalence estimate was significantly higher in patients with cancer-associated myositis and with NXP2 autoantibodies. Dysphagia is caused by inflammatory involvement of the swallowing muscles, which can lead to reduced pharyngeal contractility, cricopharyngeal dysfunction, reduced laryngeal elevation and hypomotility of the esophagus. Swallowing disorders not only impair the quality of life but can lead to serious complications such as aspiration pneumonia, thus increasing mortality. Beneficial treatment approaches reported include immunomodulatory therapy, the treatment of associated malignant diseases or interventional procedures targeting the cricopharyngeal muscle such as myotomy, dilatation or botulinum toxin injections. (4) Conclusion: Dysphagia should be included as a therapeutic target, especially in the outlined high-risk groups.
- 8 July 2020
- Published by MDPI AG in Journal of Clinical Medicine
- Vol. 9 (7) , 2150
Top Cited PapersOpen AccessThe Impact of Dysphagia in Myositis: A Systematic Review and Meta-Analysis
(1) Background: Dysphagia is a clinical hallmark and part of the current American College of Rheumatology/European League Against Rheumatism (ACR/EULAR) diagnostic criteria for idiopathic inflammatory myopathy (IIM). However, the data on dysphagia in IIM are heterogenous and partly conflicting. The aim of this study was to conduct a systematic review on epidemiology, pathophysiology, outcome and therapy and a meta-analysis on the prevalence of dysphagia in IIM. (2) Methods: Medline was systematically searched for all relevant articles. A random effect model was chosen to estimate the pooled prevalence of dysphagia in the overall cohort of patients with IIM and in different subgroups. (3) Results: 234 studies were included in the review and 116 (10,382 subjects) in the meta-analysis. Dysphagia can occur as initial or sole symptom. The overall pooled prevalence estimate in IIM was 36% and with 56% particularly high in inclusion body myositis. The prevalence estimate was significantly higher in patients with cancer-associated myositis and with NXP2 autoantibodies. Dysphagia is caused by inflammatory involvement of the swallowing muscles, which can lead to reduced pharyngeal contractility, cricopharyngeal dysfunction, reduced laryngeal elevation and hypomotility of the esophagus. Swallowing disorders not only impair the quality of life but can lead to serious complications such as aspiration pneumonia, thus increasing mortality. Beneficial treatment approaches reported include immunomodulatory therapy, the treatment of associated malignant diseases or interventional procedures targeting the cricopharyngeal muscle such as myotomy, dilatation or botulinum toxin injections. (4) Conclusion: Dysphagia should be included as a therapeutic target, especially in the outlined high-risk groups.
- Top Cited PapersOpen Access
- 28 March 2019
- Published by Springer Nature in Critical Care
- Vol. 23 (1) , 1-11
Dysphagia in the intensive care unit: epidemiology, mechanisms, and clinical management
Dysphagia may present in all critically ill patients and large-scale clinical data show that e.g. post-extubation dysphagia (PED) is commonly observed in intensive care unit (ICU) patients. Recent data demonstrate that dysphagia is mostly persisting and that its presence is independently associated with adverse patient-centered clinical outcomes. Although several risk factors possibly contributing to dysphagia development were proposed, the underlying exact mechanisms in ICU patients remain incompletely understood and no current consensus exists on how to best approach ICU patients at risk. From a clinical perspective, dysphagia is well-known to be associated with an increased risk of aspiration and aspiration-induced pneumonia, delayed resumption of oral intake/malnutrition, decreased quality of life, prolonged ICU and hospital length of stay, and increased morbidity and mortality. Moreover, the economic burden on public health care systems is high. In light of high mortality rates associated with the presence of dysphagia and the observation that dysphagia is not systematically screened for on most ICUs, this review describes epidemiology, terminology, and potential mechanisms of dysphagia on the ICU. Furthermore, the impact of dysphagia on affected individuals, health care systems, and society is discussed in addition to current and future potential therapeutic approaches.
- 28 March 2019
- Published by Springer Nature in Critical Care
- Vol. 23 (1) , 1-11
Top Cited PapersOpen AccessDysphagia in the intensive care unit: epidemiology, mechanisms, and clinical management
Dysphagia may present in all critically ill patients and large-scale clinical data show that e.g. post-extubation dysphagia (PED) is commonly observed in intensive care unit (ICU) patients. Recent data demonstrate that dysphagia is mostly persisting and that its presence is independently associated with adverse patient-centered clinical outcomes. Although several risk factors possibly contributing to dysphagia development were proposed, the underlying exact mechanisms in ICU patients remain incompletely understood and no current consensus exists on how to best approach ICU patients at risk. From a clinical perspective, dysphagia is well-known to be associated with an increased risk of aspiration and aspiration-induced pneumonia, delayed resumption of oral intake/malnutrition, decreased quality of life, prolonged ICU and hospital length of stay, and increased morbidity and mortality. Moreover, the economic burden on public health care systems is high. In light of high mortality rates associated with the presence of dysphagia and the observation that dysphagia is not systematically screened for on most ICUs, this review describes epidemiology, terminology, and potential mechanisms of dysphagia on the ICU. Furthermore, the impact of dysphagia on affected individuals, health care systems, and society is discussed in addition to current and future potential therapeutic approaches.
- 2 November 2016
- Published by SAGE Publications in International Journal of Stroke
- Vol. 12 (4) , 430-437
Design and implementation of Pharyngeal electrical Stimulation for early de-cannulation in TRACheotomized (PHAST-TRAC) stroke patients with neurogenic dysphagia: a prospective randomized single-blinded interventional study
Rationale Ongoing dysphagia in stroke patients weaned from mechanical ventilation often requires long-term tracheotomy to protect the airway from aspiration. In a recently reported single-centre pilot study, a significantly larger proportion (75%) of tracheotomized dysphagic stroke patients regained sufficient control of airway management allowing tracheotomy tube removal (decannulation) 24–72 h after pharyngeal electrical stimulation (PES) compared to controls who received standard therapy over the same time period (20%). Aim To assess the safety and efficacy of PES in accelerating dysphagia rehabilitation and enabling decannulation of tracheotomized stroke patients. Design International multi-centre prospective randomized controlled single-blind trial in approximately 126 ICU patients (the 90th percentile of the calculated maximum sample size). Study outcomes Primary outcome: proportion of stroke patients considered safe for decannulation 24–72 h after PES compared to control patients who do not receive PES. Key secondary outcomes focus on: dysphagia severity, decannulation rates, decannulation rate after a repeat PES treatment in patients persistently dysphagic after an initial PES treatment, stroke severity, duration of ICU-stay, occurrence of adverse events including pneumonia and need for recannulation over 30 days or until hospital discharge (if earlier). Discussion Dysphagia and related airway complications are reported as one of the main reasons for stroke patients remaining tracheotomized once successfully weaned from ventilation. This study will evaluate if PES can improve airway safety sufficiently enough to allow earlier tracheotomy tube removal.
- 2 November 2016
- Published by SAGE Publications in International Journal of Stroke
- Vol. 12 (4) , 430-437
Design and implementation of Pharyngeal electrical Stimulation for early de-cannulation in TRACheotomized (PHAST-TRAC) stroke patients with neurogenic dysphagia: a prospective randomized single-blinded interventional study
Rationale Ongoing dysphagia in stroke patients weaned from mechanical ventilation often requires long-term tracheotomy to protect the airway from aspiration. In a recently reported single-centre pilot study, a significantly larger proportion (75%) of tracheotomized dysphagic stroke patients regained sufficient control of airway management allowing tracheotomy tube removal (decannulation) 24–72 h after pharyngeal electrical stimulation (PES) compared to controls who received standard therapy over the same time period (20%). Aim To assess the safety and efficacy of PES in accelerating dysphagia rehabilitation and enabling decannulation of tracheotomized stroke patients. Design International multi-centre prospective randomized controlled single-blind trial in approximately 126 ICU patients (the 90th percentile of the calculated maximum sample size). Study outcomes Primary outcome: proportion of stroke patients considered safe for decannulation 24–72 h after PES compared to control patients who do not receive PES. Key secondary outcomes focus on: dysphagia severity, decannulation rates, decannulation rate after a repeat PES treatment in patients persistently dysphagic after an initial PES treatment, stroke severity, duration of ICU-stay, occurrence of adverse events including pneumonia and need for recannulation over 30 days or until hospital discharge (if earlier). Discussion Dysphagia and related airway complications are reported as one of the main reasons for stroke patients remaining tracheotomized once successfully weaned from ventilation. This study will evaluate if PES can improve airway safety sufficiently enough to allow earlier tracheotomy tube removal.
- 26 July 2014
- Published by Springer Nature in Der Nervenarzt
- Vol. 85 (8) , 1006-1015
FEES für neurogene Dysphagien
Die neurogene Dysphagie gehört zu den häufigsten und zugleich bedrohlichsten Symptomen einer Vielzahl neurologischer Erkrankungen, wie etwa dem Schlaganfall, den Parkinson-Syndromen und verschiedenen neuromuskulären Erkrankungen. Die flexible endoskopische Evaluation des Schluckakts (FEES) stellt heute in Deutschland die wahrscheinlich am häufigsten eingesetzte Methode zur objektiven Beurteilung des Schluckakts dar. Mithilfe der FEES werden die Effektivität und Sicherheit des Schluckakts beurteilt, geeignete Nahrungskonsistenzen bzw. Ernährungsformen festgelegt und der Einsatz von therapeutischen Manövern evaluiert. Aus der Datenlage geht zudem hervor, dass die FEES eine sehr gut verträgliche und sichere Untersuchung ist. Trotz des großen Bedarfs an qualifizierter Dysphagiediagnostik im klinischen Alltag wird diese Untersuchungstechnik bisher nicht systematisch vermittelt. Das in diesem Beitrag vorgestellte strukturierte Ausbildungscurriculum soll diese Lücke schließen und dazu beitragen, eine hohe FEES-Qualität sicherzustellen. Da das Dysphagiemanagement weit über das neurologische Fachgebiet hinausgeht, richtet sich dieses Curriculum auch an andere Mediziner, Logopäden, klinische Linguisten und Sprachtherapeuten mit spezieller Dysphagieexpertise. Neurogenic dysphagia is one of the most frequent and prognostically relevant neurological deficits in a variety of disorders, such as stroke, parkinsonism and advanced neuromuscular diseases. Flexible endoscopic evaluation of swallowing (FEES) is now probably the most frequently used tool for objective dysphagia assessment in Germany. It allows evaluation of the efficacy and safety of swallowing, determination of appropriate feeding strategies and assessment of the efficacy of different swallowing manoeuvres. The literature furthermore indicates that FEES is a safe and well-tolerated procedure. In spite of the huge demand for qualified dysphagia diagnostics in neurology, a systematic FEES education has yet not been established. The structured training curriculum presented in this article aims to close this gap and intends to enforce a robust and qualified FEES service. As management of neurogenic dysphagia is not confined to neurologists, this educational program is applicable to other clinicians and speech language therapists with expertise in dysphagia as well.
- 26 July 2014
- Published by Springer Nature in Der Nervenarzt
- Vol. 85 (8) , 1006-1015
FEES für neurogene Dysphagien
Die neurogene Dysphagie gehört zu den häufigsten und zugleich bedrohlichsten Symptomen einer Vielzahl neurologischer Erkrankungen, wie etwa dem Schlaganfall, den Parkinson-Syndromen und verschiedenen neuromuskulären Erkrankungen. Die flexible endoskopische Evaluation des Schluckakts (FEES) stellt heute in Deutschland die wahrscheinlich am häufigsten eingesetzte Methode zur objektiven Beurteilung des Schluckakts dar. Mithilfe der FEES werden die Effektivität und Sicherheit des Schluckakts beurteilt, geeignete Nahrungskonsistenzen bzw. Ernährungsformen festgelegt und der Einsatz von therapeutischen Manövern evaluiert. Aus der Datenlage geht zudem hervor, dass die FEES eine sehr gut verträgliche und sichere Untersuchung ist. Trotz des großen Bedarfs an qualifizierter Dysphagiediagnostik im klinischen Alltag wird diese Untersuchungstechnik bisher nicht systematisch vermittelt. Das in diesem Beitrag vorgestellte strukturierte Ausbildungscurriculum soll diese Lücke schließen und dazu beitragen, eine hohe FEES-Qualität sicherzustellen. Da das Dysphagiemanagement weit über das neurologische Fachgebiet hinausgeht, richtet sich dieses Curriculum auch an andere Mediziner, Logopäden, klinische Linguisten und Sprachtherapeuten mit spezieller Dysphagieexpertise. Neurogenic dysphagia is one of the most frequent and prognostically relevant neurological deficits in a variety of disorders, such as stroke, parkinsonism and advanced neuromuscular diseases. Flexible endoscopic evaluation of swallowing (FEES) is now probably the most frequently used tool for objective dysphagia assessment in Germany. It allows evaluation of the efficacy and safety of swallowing, determination of appropriate feeding strategies and assessment of the efficacy of different swallowing manoeuvres. The literature furthermore indicates that FEES is a safe and well-tolerated procedure. In spite of the huge demand for qualified dysphagia diagnostics in neurology, a systematic FEES education has yet not been established. The structured training curriculum presented in this article aims to close this gap and intends to enforce a robust and qualified FEES service. As management of neurogenic dysphagia is not confined to neurologists, this educational program is applicable to other clinicians and speech language therapists with expertise in dysphagia as well.
- Open Access
- 1 December 2013
- Published by Springer Nature in Experimental & Translational Stroke Medicine
- Vol. 5 (1) , 14
Guideline clinical nutrition in patients with stroke
Stroke is regularly accompanied by dysphagia and other factors associated with decreased nutritional intake. Dysphagia with aspiration pneumonia and insufficient nutritional intake lead to worse outcome after stroke.
- 1 December 2013
- Published by Springer Nature in Experimental & Translational Stroke Medicine
- Vol. 5 (1) , 14
Open AccessGuideline clinical nutrition in patients with stroke
Stroke is regularly accompanied by dysphagia and other factors associated with decreased nutritional intake. Dysphagia with aspiration pneumonia and insufficient nutritional intake lead to worse outcome after stroke.
- 8 July 2006
- Published by Elsevier in Journal of Stroke and Cerebrovascular Diseases
- Vol. 15 (4) , 172-175
Serial Fiberoptic Endoscopic Evaluation of Swallowing in Patients With Acute Stroke and Dysphagia: Case Report and General Considerations
- 8 July 2006
- Published by Elsevier in Journal of Stroke and Cerebrovascular Diseases
- Vol. 15 (4) , 172-175
Serial Fiberoptic Endoscopic Evaluation of Swallowing in Patients With Acute Stroke and Dysphagia: Case Report and General Considerations