Publications by authors named "Wolf Stefan"

Objectives: To survey physicians' views on the risks and benefits of computed tomography (CT) in the management of septic patients and indications for and contraindications to contrast media use in searching for septic foci.

Methods: A web-based questionnaire was administered to physicians at a large European university medical center in January 2022. A total of 371 questionnaires met the inclusion criteria and were analyzed with physicians' work experience, workplace, and medical specialty as independent variables.

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Secondary lymphedema is a common sequel of oncologic surgery and presents a global health burden still lacking pharmacological treatment. The infiltration of the lymphedematous extremities with CD4T cells influences lymphedema onset and emerges as a promising therapy target. Here, we show that the modulation of CD4FOXP3CD25regulatory T (T) cells upon anti-CTLA4 treatment protects against lymphedema development in patients with melanoma and in a mouse lymphedema model.

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Article Synopsis
  • - The Earlydrain trial analyzed treatment choices between clipping and coiling for ruptured cerebral aneurysms in patients with subarachnoid hemorrhage (SAH), with 287 participants across 19 centers.
  • - Clipping was used more for anterior circulation aneurysms (55%) and coiling for posterior ones (86%), with higher usage of clipping in high-volume centers (56% vs. 38%).
  • - While clipping was associated with a higher incidence of vasospasm, there were no significant differences in long-term outcomes like mortality or functional scores between the two treatment methods.
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Importance: Cerebral vasospasm largely contributes to a devastating outcome after aneurysmal subarachnoid hemorrhage (aSAH), with limited therapeutic options.

Objective: To investigate the safety and efficacy of localized nicardipine release implants positioned around the basal cerebral vasculature at risk for developing proximal vasospasm after aSAH.

Design, Setting, And Participants: This single-masked randomized clinical trial with a 52-week follow-up was performed between April 5, 2020, and January 23, 2023, at 6 academic neurovascular centers in Germany and Austria.

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Article Synopsis
  • Traumatic brain injury (TBI) is a serious issue that needs careful management of blood pressure to help patients recover better.
  • The article reviews current research and suggests using advanced monitoring tools to adjust treatment for each patient based on their unique needs.
  • It highlights challenges like the lack of standard guidelines for monitoring and calls for further studies to prove that these personalized treatments can improve outcomes for TBI patients.
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Background: Continuous bedside monitoring of brain tissue oxygen levels is a crucial component in the management of comatose patients suffering from acute brain injury on neurointensive care units. Ensuring sufficient brain oxygenation is recognized as an essential objective within neurocritical care, aimed at safeguarding patients from secondary ischemia. Hypoperfusion in occipital and the posterior watershed regions often remains undetected, as the placement of probes in these areas is challenging.

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Introduction: Botulinum toxin A (BoTA) is a neurotoxin formed by Clostridium botulinum, with a broad medical application spectrum. While the primary effect of BoTA is on the muscles, the effects of BoTA in other systems including the blood vasculature have already been examined, revealing unexpected actions. However, no studies exist to the best of our knowledge regarding the potential effects of BoTA on the lymphatic vascular system, possessing a critical role in health and disease.

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Article Synopsis
  • The study aims to understand how fluid balance affects hemoglobin levels and neurologic outcomes in patients with aneurysmal subarachnoid hemorrhage (aSAH).
  • It analyzes data from the Earlydrain trial involving 237 aSAH patients over an 8-day period in various ICUs, focusing on daily hemoglobin and fluid balance measurements.
  • Results indicate that higher fluid balance correlates with greater hemoglobin decline and poorer 6-month outcomes, suggesting fluid overload is a key factor in these complications rather than minor hemoglobin drops.
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Background: It is unknown whether decompressive craniectomy improves clinical outcome for people with spontaneous severe deep intracerebral haemorrhage. The SWITCH trial aimed to assess whether decompressive craniectomy plus best medical treatment in these patients improves outcome at 6 months compared to best medical treatment alone.

Methods: In this multicentre, randomised, open-label, assessor-blinded trial conducted in 42 stroke centres in Austria, Belgium, Finland, France, Germany, the Netherlands, Spain, Sweden, and Switzerland, adults (18-75 years) with a severe intracerebral haemorrhage involving the basal ganglia or thalamus were randomly assigned to receive either decompressive craniectomy plus best medical treatment or best medical treatment alone.

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Background: After aneurysmal subarachnoid hemorrhage (aSAH), elevated intracranial pressure (ICP) due to disrupted cerebrospinal fluid (CSF) dynamics is a critical concern. An external ventricular drainage (EVD) is commonly employed for management; however, optimal strategies remain debated. The randomized controlled Earlydrain trial showed that an additional prophylactic lumbar drainage (LD) after aneurysm treatment improves neurological outcome.

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Objective: Detection of delayed cerebral ischemia (DCI) is challenging in comatose patients with poor-grade aneurysmal subarachnoid hemorrhage (aSAH). Brain tissue oxygen pressure (PbtO2) monitoring may allow early detection of its occurrence. Recently, a probe for combined measurement of intracranial pressure (ICP) and intraparenchymal near-infrared spectroscopy (NIRS) has become available.

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Objective: In neurocritical care, data from multiple biosensors are continuously measured, but only sporadically acknowledged by the attending physicians. In contrast, machine learning (ML) tools can analyze large amounts of data continuously, taking advantage of underlying information. However, the performance of such ML-based solutions is limited by different factors, for example, by patient motion, manipulation, or, as in the case of external ventricular drains (EVDs), the drainage of CSF to control intracranial pressure (ICP).

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Subarachnoid haemorrhage (SAH) is a subtype of stroke that predominantly impacts younger individuals. It is associated with high mortality rates and can cause long-term disabilities. This review examines the contribution of the initial blood load and the dynamics of clot clearance to the pathophysiology of SAH and the risk of adverse outcomes.

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While subarachnoid hemorrhage is the second most common hemorrhagic stroke in epidemiologic studies, the recent DISCHARGE-1 trial has shown that in reality, three-quarters of focal brain damage after subarachnoid hemorrhage is ischemic. Two-fifths of these ischemic infarctions occur early and three-fifths are delayed. The vast majority are cortical infarcts whose pathomorphology corresponds to anemic infarcts.

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Objective: Aneurysmal subarachnoid hemorrhage (aSAH) from a ruptured intracranial aneurysm is a severe, life-threatening condition, with high morbidity and mortality. The current treatment often involves surgical clipping or endovascular treatment within the first 24-48 hours. Although there is ample evidence of complications in treating unruptured aneurysms, similar data in patients with acutely ruptured aneurysms are limited.

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We aimed to investigate the use of sedation in patients with severe traumatic brain injury (TBI), focusing on the choice of sedative agent, dose, duration, and their association with clinical outcomes. Multinational, multicentre, retrospective observational study. 14 trauma centres in Europe, Australia and the United Kingdom.

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Introduction: Aneurysmal subarachnoid hemorrhage (aSAH) is associated with high morbidity and mortality. Post-hemorrhagic vasospasm with neurological deterioration is a major concern in this context. NicaPlant®, a modified release formulation of the calcium channel blocker nicardipine, has shown vasodilator efficacy preclinically and a similar formulation known as NPRI has shown anti-vasospasm activity in aSAH patients under compassionate use.

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Article Synopsis
  • - Lipedema is a chronic disorder mainly affecting women, often misdiagnosed, with unclear causes and recent research highlighting changes in macrophage behavior as a key factor in the condition.
  • - A study examined the expressions of MIF-1 and MIF-2 proteins, as well as CD74 (a receptor for these proteins), in tissue samples from lipedema patients compared to matched controls, finding significant increases in MIF-1 and CD74 levels.
  • - The findings suggest that the MIF protein family, particularly through the MIF-1-CD74 interaction, may play a crucial role in the development of lipedema, providing new insights into its underlying mechanisms.
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Early and reliable prediction of shunt-dependent hydrocephalus (SDHC) after aneurysmal subarachnoid hemorrhage (aSAH) may decrease the duration of in-hospital stay and reduce the risk of catheter-associated meningitis. Machine learning (ML) may improve predictions of SDHC in comparison to traditional non-ML methods. ML models were trained for CHESS and SDASH and two combined individual feature sets with clinical, radiographic, and laboratory variables.

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Objectives: This study aims to describe physicians' perspectives on the use of computed tomography (CT) in patients with sepsis.

Methods: In January 2022, physicians of a large European university medical center were surveyed using a web-based questionnaire asking about their views on the role of CT in sepsis. A total of 371 questionnaires met the inclusion criteria and were analyzed using work experience, workplace, and medical specialty of physicians as variables.

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Importance: After aneurysmal subarachnoid hemorrhage, the use of lumbar drains has been suggested to decrease the incidence of delayed cerebral ischemia and improve long-term outcome.

Objective: To determine the effectiveness of early lumbar cerebrospinal fluid drainage added to standard of care in patients after aneurysmal subarachnoid hemorrhage.

Design, Setting, And Participants: The EARLYDRAIN trial was a pragmatic, multicenter, parallel-group, open-label randomized clinical trial with blinded end point evaluation conducted at 19 centers in Germany, Switzerland, and Canada.

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Introduction: Cerebral infarction from delayed cerebral ischemia (DCI) is a leading cause of poor neurological outcome after aneurysmal subarachnoid hemorrhage (aSAH). We performed an international clinical practice survey to identify monitoring and management strategies for cerebral vasospasm associated with DCI in aSAH patients requiring intensive care unit admission.

Methods: The survey questionnaire was available on the European Society of Intensive Care Medicine (May 2021-June 2022) and Neurocritical Care Society (April - June 2022) websites following endorsement by these societies.

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Lipedema, lipohypertrophy and secondary lymphedema are three conditions characterized by disproportionate subcutaneous fat accumulation affecting the extremities. Despite the apparent similarities and differences among their phenotypes, a comprehensive histological and molecular comparison does not yet exist, supporting the idea that there is an insufficient understanding of the conditions and particularly of lipohypertrophy. In our study, we performed histological and molecular analysis in anatomically-, BMI- and gender-matched samples of lipedema, lipohypertrophy and secondary lymphedema versus healthy control patients.

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Objective: Lumbar drainage of cerebrospinal fluid for treatment of refractory increased intracranial pressure (ICP) is associated with the risk of infratentorial herniation, but real-time biomarkers for signaling herniation at bedside are lacking. Here, the authors tested whether an alteration of pulsatile waveform conduction across the level of the foramen magnum could serve as an indicator of insufficient hydrostatic communication and impending herniation.

Methods: This prospective observational cohort study included patients with severe acute brain injury who underwent continuous external ventricular drain monitoring of ICP and lumbar drain pressure monitoring.

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