Publications by authors named "Uwe Ebmeyer"

Article Synopsis
  • This study investigates the effects of asphyxia cardiac arrest/resuscitation (ACA/R) on different retinal cell populations in rats, focusing on their degeneration patterns using various immuno-histological techniques.
  • Key findings include significant retinal thinning, ganglion cell degeneration, and the decline of amacrine and cone bipolar cells, while rod photoreceptors showed enhanced resistance to ACA/R damage.
  • The research highlights the activation of Müller cells and the role of calcium-binding proteins in the retina's response to stress, suggesting potential avenues for improving outcomes after stroke-related vision loss.
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Background: After cardiac arrest/resuscitation (CA/R), animals often had massive functional restrictions including spastic paralysis of hind legs, disturbed balance and reflex abnormalities. Patients who have survived CA also develop movement restrictions/disorders. A successful therapy requires detailed knowledge of the intrinsic damage pattern and the respective mechanisms.

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The European Resuscitation Guidelines recommend that survivors of cardiac arrest (CA) be resuscitated with 100% O and undergo subsequent-post-return of spontaneous circulation (ROSC)-reduction of O supply to prevent hyperoxia. Hyperoxia produces a "second neurotoxic hit," which, together with the initial ischemic insult, causes ischemia-reperfusion injury. However, heterogeneous results from animal studies suggest that normoxia can also be detrimental.

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Background: In studies on cardiac arrest (CA)/resuscitation (R) injury, Purkinje cell degeneration was described, however, with inconsistent data concerning severity and time point of manifestation. Moreover, CA/R studies paid only limited attention to inhibitory stellate interneurons. To this aim, the hypothesis that cerebellar could be relatively resilient toward CA/R because of diverse cellular defense mechanisms including interaction with stellate cells was tested.

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Objective: To evaluate two standard procedure-specific pain regimens and to assess independent predictors for higher pain intensity after thoracic surgery.

Methods: Patients received either oral opioid analgesia (Opioid Group) or epidural analgesia and were then bridged to systemic opioid analgesia (EDA + O Group) in this retrospective observational study. Medical history, discharge letters, anesthetic protocols, and pain protocols were evaluated in 621 patients after open thoracotomy and assessed with a stepward back elimination in a multivariate logistic regression model.

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Asphyxial cardiac arrest (ACA)-induced ischemia results in acute and delayed neuronal cell death. The early reperfusion phase is critical for the outcome. Intervention strategies directed to this period are promising to reduce ACA/resuscitation-dependent impairments.

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Cardiac arrest (CA) is a common cause of disability and mortality and thus an important risk for human health. Circulatory failure has dramatic consequences for the brain as one of the most oxygen-consuming organs. Hippocampus, striatum and neocortex rate among the most vulnerable brain regions.

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Article Synopsis
  • The study aimed to replace halothane with sevoflurane in a rat model of asphyxia cardiac arrest (ACA) to reduce health risks and align with clinical practices, given halothane's toxicity.
  • Adult rats underwent ACA followed by resuscitation, with observations on vital signs and blood parameters during recovery, and brain tissue evaluated after 7 days.
  • Results showed that sevoflurane anesthetized rats had better heart rate and blood pressure, along with reduced neurological damage in the hippocampus compared to those treated with halothane, validating the model's effectiveness despite necessary adjustments.
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Background: Chronic post-thoracotomy pain (CPP) has a high incidence. However, less is known about risk factors and the influence of different analgesia therapies.

Methods: In this prospective cohort study, patients either received standardized epidural analgesia or began an oral analgesic protocol with controlled-release oxycodone immediately postoperatively.

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We present a 54 year old female patient who had undergone a Ross procedure in 2009, and in 2013 again a replacement of the aortic root and arch with bioprothetic material and homograft replacement of the pulmonalis walve. Postoperatively the patient had experienced a functional compromising tracheal stenosis and a persistent esophago-tracheal fistula. Endoscopic attempts to close the fistula were not successful, and the fistula was "bridged" with an endoscopically positioned tracheal stent.

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The acute ischemic stroke (AIS) is a major cause of death and disability in Germany. The treatment of patients with AIS focuses on rapid recanalization of close brain vessels. Anaesthesiologists are likely to encounter patients with AIS and must be aware of the anaesthetic considerations for these patients.

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The development of the physician based prehospital emergency medicine system of the former GDR started in the early 1960th. Initially the use of ambulances was trauma-orientated. Because of the increasing number for non-traumatic emergencies the so called SMH-system (emergency medical services) was stepwise established.

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Objective: The aim of this study was to evaluate the outcome of intravenously applied nitroglycerine (NTG, 1μgkg(-1)min(-1) for 1h) after resuscitation from an asphyxia cardiac arrest (ACA) insult. We hypothesized that NTG infused for 1h after the return of spontaneous circulation (ROSC) would improve functional and neuro-morphological outcomes.

Methods: Adult rats were subjected to 8min of ACA followed by resuscitation.

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Background: Minocycline, a second-generation tetracycline antibiotic, exhibits anti-inflammatory and neuroprotective effects in various experimental models of neurological diseases, such as stroke, Alzheimer's disease, amyotrophic lateral sclerosis and spinal cord injury. However, conflicting results have prompted a debate regarding the beneficial effects of minocycline.

Methods: In this study, we analyzed minocycline treatment in organotypic spinal cord cultures of neonatal rats as a model of motor neuron survival and regeneration after injury.

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Vijlbrief et al. [Neonatology 2012;102:243-248] reported a beneficial effect of hypothermia on cardiac function after perinatal asphyxia indicated by low levels of B-type natriuretic peptide (BNP). Elevated troponin I plasma levels, however, reflects impairment of cardiomyocytes under hypothermic conditions.

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Objective: The study investigated a possible neuroprotective potency of minocycline in an experimental asphyxial cardiac arrest (ACA) rat model. Clinically important survival times were evaluated thus broadening common experimental approaches.

Methods: Adult rats were subjected to 5 min of ACA followed by resuscitation.

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[Anaesthesia for interventional procedures].

Anasthesiol Intensivmed Notfallmed Schmerzther

October 2009

Interventional radiologists perform a wide range of procedures. The anaesthesiologist takes care for provision of a physiologically stable and immobile patient, alteration of arterial blood pressure as necessary, and appropriate and timely management of complications. In this article we discuss the anaesthetic considerations for procedures like embolization of arterio-venous malformations, coiling of cerebral aneurysms, kyphoplasty and vertebroplasty including the preprocedure preparation, monitoring requirements, suitable anaesthetic techniques, postprocedure management and complication.

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Background: Cardiac arrest, and the associated arrest of blood circulation, immediately leads to permanent brain damage because of the exhaustion of oxygen, glucose and energy resources in the brain. Most hippocampal CA1 neurons die during the first week post the insult. Molecular data concerning the recovery after resuscitation are sparse and limited to the early time period.

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Oxidative stress is one of the major pathological factors in the cascade that leads to cell death in cerebral ischemia. Here, we investigated the neuroprotective effect of a naturally occurring antioxidant, oxyresveratrol, to reduce brain injury after cerebral stroke. We used the transient rat middle cerebral artery occlusion (MCAO) model of brain ischemia to induce a defined brain infarction.

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