Publications by authors named "Zahn P"

Article Synopsis
  • A significant number of patients experience chronic pain after surgery, highlighting the urgent need for predictive models that consider bio-psycho-social and physiological factors.
  • A study involving male volunteers assessed pain characteristics, psychological factors, and blood proteomics before and after an experimental incision to predict outcomes related to pain intensity and hyperalgesia.
  • The results revealed that a combination of diverse parameters could predict pain responses more accurately than single features, identified specific protein signatures associated with inflammation, and suggested repurposing existing medications for better pain management.
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Background: Cardiopulmonary bypass (CPB) triggers marked cytokine release often followed by a systemic inflammatory response syndrome, associated with adverse postoperative outcomes. This trial investigates the intraoperative use of haemoadsorption (HA) during cardiac surgery with CPB to assess its impact on postoperative systemic inflammatory response.

Methods: In this prospective randomised controlled trial (ethics approval no.

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Remote ischemic preconditioning (RIPC) reduces ischemia-reperfusion injury in aortocoronary bypass surgery, potentially via extracellular vesicles (EVs) and their micro-RNA content. Clinical data implicate that propofol might inhibit the cardioprotective RIPC effect. This prospective, randomized study investigated the influence of different anesthetic regimes on RIPC efficacy and EV micro-RNA signatures.

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Background: The limb symmetry index (LSI) is a metric of strength restoration. It is key to successfully return to sports after anterior cruciate ligament (ACL) reconstruction. The threshold for return to sports is generally considered an LSI of ≥85%.

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The inhibitory function of GABA at the spinal level and its central modulation in the brain are essential for pain perception. However, in post-surgical pain, the exact mechanism and modes of action of GABAergic transmission have been poorly studied. This work aimed to investigate GABA synthesis and uptake in the incisional pain model in a time-dependent manner.

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The mortality of severely burned patients can be predicted by multiple scores which have been created over the last decades. As the treatment of burn injuries and intensive care management have improved immensely over the last years, former prediction scores seem to be losing accuracy in predicting survival. Therefore, various modifications of existing scores have been established and innovative scores have been introduced.

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Background: The presence of Nucleated Red Blood Cells (NRBCs) in critically ill patients is associated with higher mortality and poor prognosis. Although patients on extracorporeal support such as veno-venous or veno-arterial extracorporeal membrane oxygenation (VV/VA-ECMO) are severely ill, NRBCs have rarely been investigated regarding their predictive value so far.

Methods: As part of a retrospective study, we examined all cardiothoracic surgery patients from July 2019 to September 2020 who received ECMO treatment during their inpatient stay.

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The current-voltage characteristics of a single-molecule junction are determined by the electronic coupling Γ between the electronic states of the electrodes and the dominant transport channel(s) of the molecule. Γ is profoundly affected by the choice of the anchoring groups and their binding positions on the tip facets and the tip-tip separation. In this work, mechanically controllable break junction experiments on the ,'-bis(5-ethynylbenzenethiol-salicylidene)ethylenediamine are presented, in particular, the stretch evolution of Γ with increasing tip-tip separation.

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Article Synopsis
  • Autism Spectrum Disorders (ASD) patients show abnormal pain processing, with either reduced sensitivity or heightened reactions to pain; the role of specific neural circuits in this context remains poorly understood.
  • In a study using Shank2 mouse models that mimic ASD traits, researchers found increased pain sensitivity and altered neuronal activity in the spinal cord related to nociceptive processing.
  • The research highlights that high levels of Shank2 expression correspond to a distinct group of inhibitory neurons, suggesting that disruptions in these circuits could contribute to the pain sensitivity observed in ASD.
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Game theory is used by all behavioral sciences, but its development has long centered around the economic interpretation of equilibrium outcomes in relatively simple games and toy systems. But game theory has another potential use: the high-level design of large game compositions that express complex architectures and represent real-world institutions faithfully. Compositional game theory, grounded in the mathematics underlying programming languages, and introduced here as a general computational framework, increases the parsimony of game representations with abstraction and modularity, accelerates search and design, and helps theorists across disciplines express real-world institutional complexity in well-defined ways.

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Background: In on-pump cardiac surgery, lungs are at high risk of periprocedural organ impairment because of atelectasis formation, ventilator-induced lung injury, and hyperinflammation due to the cardiopulmonary bypass which results in postoperative pulmonary complications in half of this patient population. The new ventilation mode flow-controlled ventilation (FCV) uniquely allows full control of ins- and expiratory airway flows. This approach reduces the mechanical power of invasive ventilation as a possible cause of ventilator-induced lung injury.

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Background: Acute pain after surgery is common and often leads to chronic post-surgical pain, but neither treatment nor prevention is currently sufficient. We hypothesised that specific protein networks (protein-protein interactions) are relevant for pain after surgery in humans and mice.

Methods: Standardised surgical incisions were performed in male human volunteers and male mice.

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Background: Conditioned pain modulation (CPM) and offset analgesia quantify impairment of endogenous pain modulation, but magnitude and reliability vary broadly between studies, indicating influencing factors that are not currently controlled for. The aim of this study was to quantify magnitude and retest reliability of CPM and offset analgesia in healthy participants, while investigating the influence of sex and sex hormone levels.

Methods: Sixty-two participants (30 female) completed the study.

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The dual nature of Janus particles confers fascinating properties such as a response to multiple stimuli. In this communication, we systematically study the sensitivity to a uniform external magnetic field of isolated Janus rod-shaped and spherical particles in water confined to two dimensions. The Janus asymmetry of the particles is given by magnetic [Co(0.

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Auricular acupuncture at the "relaxation point" and lavender oil aromatherapy can reduce preoperative anxiety associated with increased mortality and morbidity. Data on the effect of combined auricular acupuncture and lavender oil aromatherapy in patients undergoing cardiovascular interventions with the use of local anesthesia or under conscious sedation are sparse. The authors sought to evaluate the efficacy of auricular acupuncture and lavender oil aromatherapy in reducing preinterventional anxiety in cardiovascular patients.

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Study Objective: Postoperative pain management in opioid users remains challenging. The perioperative administration of ketamine might lead to favourable pain outcomes in these patients.

Study Design: A systematic review of randomised controlled trials (RCT) with meta-analysis and assessment of the quality of evidence by GRADE was performed.

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Article Synopsis
  • * The study involved 127 patients with traumatic fractures, assessing pain intensity and quality of life over a year, revealing a connection between higher pain levels, increased need for analgesics, and a decline in quality of life in CPSP patients.
  • * Neuropathic CPSP was identified in a smaller percentage of patients, but a significant 68.6% of those with CPSP exhibited at least one neuropathic symptom after 12 months, indicating
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The fabrication of individual nanowire-based devices and their comprehensive electrical characterization remains a major challenge. Here, we present a symmetric Hall bar configuration for highly p-type germanium nanowires (GeNWs), fabricated by a top-down approach using electron beam lithography and inductively coupled plasma reactive ion etching. The configuration allows two equivalent measurement sets to check the homogeneity of GeNWs in terms of resistivity and the Hall coefficient.

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Objectives: Inhalative anesthesia is of common use, but is generally known to potentiate postoperative nausea and vomiting (PONV). With an internal change of anesthesia regimen from total intravenous anesthesia (TIVA) to isoflurane (in terms of myocardial protection) in cardiac anesthesia a higher incidence of PONV was to be expected. Therefore, we evaluated the incidence of PONV after the simultaneous implementation of PONV prophylaxis.

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Objectives: Pain after surgery has a major impact on acute and long-term recovery and quality of life, but its management is often insufficient. To enhance the quality of research and to allow for better comparability between studies, it is important to harmonize outcomes for assessing the efficacy and effectiveness of pain management interventions after surgery. As a first step in developing a core outcome set, this study aimed to systematically search for outcome domains assessed in research regarding acute pain management after sternotomy as an example of a typically painful surgical procedure.

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Study Objective: Selective-serotonin-noradrenaline-reuptake inhibitors (SSNRI) might be an interesting option for postoperative pain treatment. Objective was to investigate postoperative pain outcomes of perioperative SSNRI compared to placebo or other additives in adults undergoing surgery.

Design: Systematic review of randomised controlled trials (RCT) with meta-analysis and GRADE assessment.

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Article Synopsis
  • Low corrugation of the Au(111) surface allows PEEB molecules to create quasi interlocked lateral patterns, as seen in low-temperature scanning tunneling microscopy experiments.
  • A multi-dimensional clustering approach is used to quantify the interactions between the PEEB molecules and explain the observed patterns.
  • High-throughput calculations reveal that the energy function, which accounts for both adsorption and intermolecular energies, shows that certain pattern formations are preferred at specific coverage densities, potentially leading to the development of molecular wires on the Au(111) surface.*
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Postoperative pain management is still insufficient, leading to major deficits, including patient suffering, impaired surgical recovery, long-term opioid intake, and postsurgical chronic pain. Yet, identifying the best treatment options refers to a heterogeneous outcome assessment in clinical trials, not always reflecting relevant pain-related aspects after surgery and therefore hamper evidence synthesis. Establishing a core outcome set for perioperative pain management of acute pain after surgery may overcome such limitations.

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Background: The largest German study on place of death was performed for deaths in selected regions of Westphalia in the years 2001 and 2011. In the period thereafter, provision of palliative care was regionally expanded. This upgrade included the establishment of palliative medicine consultation services (PMCS), combining general and specialized palliative care on an outpatient basis.

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Background: Understanding microvascular physiology is key to any reconstructive procedure. Current concepts in anesthesia increasingly involve regional peripheral nerve blockade during microvascular reconstructive procedures. Whereas favorable effects on perfusion due to these techniques have been reported earlier, little evidence focusing on its effects in most peripheral vascular compartments is available.

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