Publications by authors named "Filip de Somer"

Article Synopsis
  • This study aimed to assess how deep hypothermia affects oxygen extraction (OE) and oxygen consumption (VO) in patients undergoing a specific heart surgery at different temperatures (normothermic, 30°C, 25°C, and 18°C).
  • Over 3 months, 24 patients' hemodynamic and blood gas data were collected, revealing significant decreases in VO (from 65.9 to 25.1 mL O/min/m) and OE (from 18% to 9%) as temperature dropped to 18°C.
  • The results indicate that metabolic needs are primarily met by dissolved oxygen during the cooling phase, highlighting the importance of increasing arterial oxygen pressure to prevent hypoxia in patients undergoing deep hyp
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Unfractionated heparin is the most used anticoagulative agent for extracorporeal settings in children, including acute hemodialysis modalities. In certain situations, such as heparin-induced thrombocytopenia, alternatives must be applied. The direct thrombin inhibitor bivalirudin has come forth as an attractive substitute.

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Article Synopsis
  • Electroencephalography (EEG) is a tool that helps doctors monitor how well anesthesia is working during surgeries, especially heart surgeries that involve machines called cardiopulmonary bypass (CPB).
  • During these surgeries, doctors can't always rely on usual signs like heart rate because they can change a lot.
  • Using processed EEG can help medical teams check if patients are getting the right amount of anesthesia and spot problems that could harm the brain, which is super important for patient safety.
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Objectives: Adequate theoretical and practical training of prospective clinical perfusionists is essential for maintaining clinical standards and ensuring patient safety during cardiac surgery procedures. Perfusion schools play a crucial role in establishing and maintaining higher education and training standards in clinical perfusion. The aim of this study is to obtain a comprehensive overview of European training standards in clinical perfusion in 2023.

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Background: Cardiac catheterizations in horses are mainly performed in the right heart, as access to the left heart traditionally requires an arterial approach. Transseptal puncture (TSP) has been adapted for horses but data on follow-up and closure of the iatrogenic atrial septal defect (iASD) are lacking.

Hypothesis/objectives: To perform TSP and assess postoperative complications and iASD closure over a minimum of 4 weeks.

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Background: During extended (nocturnal) hemodialysis (ENHD), the dose of low-molecular-weight heparin (LMWH) can be administered as a single injection or as a divided dose over different time points. Our hypothesis was that a single injection might be sufficient to maintain dialyzer fiber patency. In addition, we investigated whether the biochemical clotting parameter anti-Xa accurately predicts fiber blocking.

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Cardiac Surgery-Associated Acute Kidney Injury (CSA-AKI) is a serious complication seen in approximately 20-30% of cardiac surgery patients. The underlying pathophysiology is complex, often involving both patient- and procedure related risk factors. In contrast to AKI occurring after other types of major surgery, the use of cardiopulmonary bypass comprises both additional advantages and challenges, including non-pulsatile flow, targeted blood flow and pressure as well as the ability to manipulate central venous pressure (congestion).

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The consensus in aging is that inflammation, cellular senescence, free radicals, and epigenetics are contributing factors. Skin glycation through advanced glycation end products (AGEs) has a crucial role in aging. Additionally, it has been suggested that their presence in scars leads to elasticity loss.

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Background: Activated clotting times (ACTs) are used to screen for coagulopathies and monitor heparin therapy.

Objectives: To determine a reference interval (RI) for ACT in dogs using a point-of-care analyser, to quantify intra-subject within- and between-day variability, to quantify analyser reliability and inter-analyser agreement and to study the influence of a delay in measurement.

Methods: Forty-two healthy dogs were included.

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Cardiac surgery on cardiopulmonary bypass (CPB) is associated with postoperative renal dysfunction, one of the most common complications of this surgical cohort. Acute kidney injury (AKI) is associated with increased short-term morbidity and mortality and has been the focus of much research. There is increasing recognition of the role of AKI as the key pathophysiological state leading to the disease entities acute and chronic kidney disease (AKD and CKD).

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Background: Education in ECMO starts with basic theory and physiology. For this type of training, self-assessment e-learning modules may be beneficial. The aim of this study was to generate consensus on essential ECMO skills involving various professional groups involved in caring for ECMO patients.

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Neurologic complications, associated with cardiac surgery and cardiopulmonary bypass (CPB) in adults, are common and can be devastating in some cases. This comprehensive review will not only consider the broad categories of stroke and neurocognitive dysfunction, but it also summarises other neurological complications associated with CPB, and it provides an update about risks, prevention and treatment. Where appropriate, we consider the impact of off-pump techniques upon our understanding of the contribution of CPB to adverse outcomes.

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Article Synopsis
  • The 2016 MiECTiS position paper encouraged collaboration among cardiac surgeons, anesthesiologists, and perfusionists to establish a common language and framework for minimal invasive perfusion technologies.
  • Recent consensus updates confirm that modular minimal invasive extracorporeal circulation (MiECC) is a safe and effective technique for adult cardiac surgeries, enhancing biocompatibility and ensuring patient safety.
  • The MiECTiS supports MiECC as a multidisciplinary approach that significantly benefits patient care, urging its broader adoption to improve healthcare outcomes.
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Article Synopsis
  • The study investigates the relationship between hemodynamics and the development of acute kidney injury (AKI) in patients after cardiac surgery.
  • It found that low mean perfusion pressure (MPP) and high central venous pressure (CVP) are linked to the onset of severe AKI, while MPP, not vaso-inotropic support, is crucial for AKI recovery before ICU discharge.
  • Ultimately, maintaining optimal MPP and managing CVP can help in preventing and reversing CSA-AKI in cardiac surgery patients.
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Background: Viscoelastic tests (VETs) are recommended during cardiac surgery to monitor coagulation status and guide transfusion. We compared the results of two VETs, the Sonoclot Analyzer and the ROTEM Sigma. Agreement between viscoelastic tests' subdiagnoses and overall diagnosis severity was assessed.

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Extracorporeal membrane oxygenation (ECMO) is frequently used in many centers around the globe for various indications. However, prognosis is often poor even with all supportive therapies, and in many cases, clinical deterioration is associated with inflammation. Hemoadsorption with CytoSorb is a novel approach to limit the inflammatory response, and the device can be safely and easily installed into ECMO circuits.

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Cataracts are the major cause of blindness worldwide, largely resulting from aging and diabetes mellitus. Advanced glycation end products (AGEs) have been identified as major contributors in cataract formation because they alter lens protein structure and stability and induce covalent cross-linking, aggregation, and insolubilization of lens crystallins. We investigated the potential of the deglycating enzyme fructosamine-3-kinase (FN3K) in the disruption of AGEs in cataractous lenses.

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Objectives: The aim of this study was to investigate the effect of short- versus long-segment aortic stiffness and stenosis on ventriculo-arterial interaction in a porcine model of coarctation repair.

Methods: Short-long aortic stiffness was created by transection/suture [coarctation (CoA) suture, n = 6] and stenting (stent, n = 5) of the proximal descending aorta. Short-long aortic stenosis was achieved by wrapping a prosthetic graft around the aorta to 1/3-circumference reduction, over a segment length of 1 cm (CoA suture stenosis, n = 5) and 4.

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