Publications by authors named "Deisz R"

Background: Evidence-based infectious disease and intensive care management is more relevant than ever. Medical expertise in the two disciplines is often geographically limited to university institutions. In addition, the interconnection between inpatient and outpatient care is often insufficient (eg, no shared electronic health record and no digital transfer of patient findings).

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Microglia express Toll-like receptors (TLRs) that sense pathogen- and host-derived factors, including single-stranded RNA. In the brain, let-7 microRNA (miRNA) family members are abundantly expressed, and some have recently been shown to serve as TLR7 ligands. We investigated whether let-7 miRNA family members differentially control microglia biology in health and disease.

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The progression of complex human diseases is associated with critical transitions across dynamical regimes. These transitions often spawn early-warning signals and provide insights into the underlying disease-driving mechanisms. In this paper, we propose a computational method based on surprise loss (SL) to discover data-driven indicators of such transitions in a multivariate time series dataset of septic shock and non-sepsis patient cohorts (MIMIC-III database).

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Background: Sepsis is a major health care problem with high morbidity and mortality rates and affects millions of patients. Telemedicine, defined as the exchange of medical information via electronic communication, improves the outcome of patients with sepsis and decreases the mortality rate and length of stay in the intensive care unit (ICU). Additional telemedicine rounds could be an effective component of performance-improvement programs for sepsis, especially in underserved rural areas and hospitals without ready access to critical care physicians.

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Alterations of the hyperpolarization activated nonselective cation current (I) are associated with epileptogenesis. Accordingly, the second-generation antiepileptic drug lamotrigine (LTG) enhances I in rodent hippocampus. We directly evaluated here whether LTG fails to enhance I in neocortical slices from patients with pharmacoresistant epilepsy.

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Introduction: Tele-intensive care unit (tele-ICU) services offer the possibility to provide specialized medical care in remote areas and to improve patient outcomes. The aim of this study was to implement and evaluate an additional telepharmaceutical expert consultation as part of tele-ICU services.

Methods: This is a prospective observational study conducted in the telemedicine centre of the University Hospital RWTH Aachen, Germany.

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Background: Outcome data on fluid therapy in critically ill patients from randomised controlled trials may be different from data obtained by observational studies under "real-life" conditions. We conducted this prospective, observational study to investigate current practice of fluid therapy (crystalloids and colloids) and associated outcomes in 65 German intensive care units (ICUs). In total, 4545 adult patients who underwent intravenous fluid therapy were included.

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Gender-specific differences in the outcome of patients with burn injury have been recognized in the past with female patients being at a higher risk of mortality. We hypothesized that early post-burn interleukin-6 (IL-6) cytokine levels may contribute to the different gender-specific outcome. We retrospectively examined 94 burned patients who were treated in the Burn Intensive Care Unit at the University Hospital Aachen.

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Anasthesiol Intensivmed Notfallmed Schmerzther

February 2017

Intensive care unit (ICU) telemedicine is one option to improve clinical relevant outcomes in terms of mortality, length of stay and morbidity. Telemedicine combines the advantage of locally available intensive medical care with the shared expertise of specialized centers by data and information exchange. The article describes the organizational and technical feasibility of different options, as well as the effects and limitations of ICU telemedicine.

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Background: Intensive care medicine is challenged by demographic changes and an increasing number of patient combined with existing shortage of doctors. Telemedicine is a promising approach to ensure patient care in the coming years. Due to a shortage of intensive care physicians in the USA, comprehensive telemedicine coverage has already been established.

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Gap junctions (GJ) have been implicated in the synchronization of epileptiform activities induced by 4-aminopyrine (4AP) in slices from human epileptogenic cortex. Previous evidence implicated glial GJ to govern the frequency of these epileptiform events. The synchrony of these events (evaluated by the phase unlocking index, PUI) in adjacent areas however was attributed to neuronal GJ.

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The demographic challenge of the ageing society is associated with increasing comorbidity. On the other hand, there will be an ageing workforce in medicine, resulting in an imbalance between the demand and supply of medical care in the near future. In rural areas in particular, this imbalance is already present today.

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Cholinergic transmission plays a pivotal role in learning, memory and cognition, and disturbances of cholinergic transmission have been implicated in neurological disorders including Alzheimer's disease, epilepsy and schizophrenia. Pharmacological alleviation of these diseases by drugs including N-desmethylclozapine (NDMC), promising in animal models, often fails in patients. We therefore compared the effects of NDMC on glutamatergic and GABAergic transmission in slices from rat and human neocortex.

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The normal function of GABAA receptor-mediated inhibition is governed by several factors, including release of GABA, subunit composition and density of the receptors and in particular by the appropriate ionic gradient. In the human epileptogenic neocortex an impaired chloride (Cl(-)) gradient has been proposed, due to decreases of potassium-coupled chloride transport (KCC2) and voltage-gated Cl(-) channels (ClC). Regarding sodium- and potassium-coupled Cl(-) transport (NKCC1) both up- and downregulations have been proposed.

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Critical care medicine in severely burned patients should be adapted to the different pathophysiological phases. Accordingly, surgical and non-surgical therapy must be coordinated adequately. Initial stabilization of the burn victim during the first 24 hours (Surgical therapy and critical care medicine in severely burned patients - Part 1: the first 24 ours, AINS 9/12) is followed by a long lasting reconstructive period.

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Critical care medicine in severely burned patients should be adapted to the different pathophysiological phases. Accordingly, surgical and non-surgical therapy must be coordinated adequately. Initial wound care comprises topical treatment of less severely injured skin and surgical debridement of severely burned areas.

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Article Synopsis
  • Acetylcholine plays a key role in learning and memory, but the effects of muscarinic acetylcholine receptors (mAChRs) in the human brain remain unclear, prompting this study using human cortical slices from epilepsy surgeries.
  • The mAChR agonist carbachol (CCh) was found to increase neuronal firing and affect excitatory synaptic transmission, with different mAChR antagonists showing varying degrees of effectiveness in reversing these effects.
  • The research highlights the complex interplay of distinct mAChRs in regulating neuronal activity and synaptic transmission, suggesting that changes in mAChR signaling may impact hyperexcitability and cognitive functions in the brain.
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Article Synopsis
  • Cholinergic transmission, particularly through muscarinic acetylcholine receptors (mAChRs), plays a role in learning and memory, but its effects in the neocortex are not well understood, prompting research using rat neocortical slices.
  • The cholinergic agonist carbachol (CCh) was found to increase neuronal firing while simultaneously reducing synaptic transmission, with varying effects based on which specific mAChR antagonists were administered.
  • The study concluded that different mAChRs mediate distinct effects: M₁ mAChR increases neuronal firing, M₂ mAChR decreases inhibition, and M₄ mAChR causes depression of excitatory transmission, suggesting a
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Considerable evidence indicates disturbances in the ionic gradient of GABAA receptor-mediated inhibition of neurones in human epileptogenic tissues. Two contending mechanisms have been proposed, reduced outward and increased inward Cl⁻ transporters. We investigated the properties of Cl⁻ transport in human and rat neocortical neurones (layer II/III) using intracellular recordings in slices of cortical tissue.

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Several reference genes have been used to quantify gene expression in human epilepsy surgery tissue. However, their reliability has not been validated in detail, although this is crucial in interpreting epilepsy-related changes of gene expression. We evaluated 12 potential reference genes in neocortical tissues resected from patients with temporal lobe epilepsy (TLE) with either few or many seizures (n=6 each) and post mortem controls (n=6) using geNorm and NormFinder algorithms.

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N-desmethylclozapine (NDMC) has been reported to display partial agonism at the human recombinant and rat native M(1) mAChR, a property suggested to contribute to the clinical efficacy of clozapine. However, the profile of action of NDMC at the human native M(1) mAChR has not been reported. The effect of NDMC on M(1) mAChR function was investigated in human native tissues by assessing its effect on (1) M(1) mAChR-mediated stimulation of [(35)S]-GTPgammaS-G(q/11)alpha binding to human post mortem cortical membranes and (2) the M(1) mAChR-mediated increase in neuronal firing in human neocortical slices.

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Purpose: Hyperpolarization-activated cation currents (I(H)) play a pivotal role in the control of neuronal excitability. In animal models of epilepsy both increases and decreases of I(H) have been reported. We, therefore, characterized properties of I(H) in human epileptogenic neocortex.

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Purpose: Effects of pre- and postsynaptic γ-aminobutyric acid B (GABA(B)) receptor activation were characterized in human tissue from epilepsy surgery.

Methods: Slices of human cortical tissue were investigated in a submerged-type chamber with intracellular recordings in layers II/III. Parallel experiments were performed in rat neocortical slices with identical methods.

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Cortical information processing depends crucially upon intrinsic neuronal properties modulating a given synaptic input, in addition to integration of excitatory and inhibitory inputs. These intrinsic mechanisms are poorly understood in sensory cortex areas. We therefore investigated neuronal properties in slices of the auditory cortex (AC) of normal hearing mice using whole-cell patch-clamp recordings of pyramidal neurons in layers II/III, IV, V, and VI in the current- and voltage clamp mode.

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A 49-year-old woman was admitted to the intensive care ward with increasing shortness of breath due to a massive soft tissue swelling of the neck and face and a marked macroglossia. Similar symptoms were already observed earlier in the patient as well as her father, although such symptoms were never as dramatic as they were on this occasion. The patient was intubated bronchoscopically and treated unsuccessfully with cortisone, fresh plasma und C1-esterase inhibitor.

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