Publications by authors named "Guowei Tu"

Background: Pleural effusion (PE) commonly occurs in cardiac surgery patients, often requiring tube drainage. This study aimed to investigate associations between PE drainage trajectories and clinical outcomes in patients undergoing cardiac surgery.

Methods: Patients who underwent cardiac surgery and subsequent tube drainage during hospitalization in the intensive care unit, due to substantial PE, were enrolled.

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Objectives: In this retrospective study, we investigated the incidence of postoperative acute kidney injury (AKI) and determined the predictors associated with AKI in patients underwent surgeries for acute type A aortic dissection (ATAAD).

Methods: We enrolled patients diagnosed with ATAAD and received operation. AKI was defined based on the Kidney Disease: Improving Global Outcomes criteria.

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Ischemia reperfusion injury (IRI) is commonly seen in surgical procedures involving cardiopulmonary bypass and post-shock reperfusion. Sudden restoration of blood flow after a period of ischemia triggers a rapid accumulation of reactive oxygen species (ROS) and oxidative stress that promote pathological injury. Macrophage-derived inflammatory responses are also thought to contribute to such injury, but how ROS influences tissue macrophages and their elaboration of inflammatory cytokines in IRI remains poorly understood.

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Objectives: This study aimed to investigate the value of brain computed tomography perfusion (CTP) imaging in predicting neurological outcomes early in patients with suspected ischemic cerebral events after cardiac surgery.

Design: Retrospective observational study.

Setting: A university teaching hospital.

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Objectives: This study aims to evaluate the organ-protective efficacy of postoperative glucocorticoid in patients with type A aortic dissection.

Methods: Postoperative type A aortic dissection patients were randomly allocated to receive either postoperative glucocorticoid or standard-of-care treatment. Intravenous methylprednisolone was administered for 3 days.

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Article Synopsis
  • The study investigates the effectiveness of the modified furosemide responsiveness index (mFRI) as a biomarker for predicting the progression of acute kidney injury (AKI) and adverse outcomes in patients who experienced mild to moderate AKI after cardiac surgery.
  • It compared mFRI with other renal biomarkers and cytokines, finding that mFRI performed equally or better in predicting AKI progression and other serious outcomes like hospital mortality and renal replacement therapy (RRT).
  • The research suggests that using a combination of mFRI and urinary injury biomarkers improves the prediction of adverse renal outcomes more effectively than using either biomarker alone.
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  • The study evaluated the effectiveness and safety of remifentanil compared to dexmedetomidine in cardiac surgery patients experiencing moderate-to-severe intolerance to noninvasive ventilation (NIV).
  • The results indicated that while both medications had similar mitigation rates for NIV intolerance overall, remifentanil showed a significant advantage at the 15-minute mark and had a higher odds ratio for success after accounting for time.
  • Adverse effects were noted in the dexmedetomidine group, including instances of bradycardia and severe hypotension, whereas no adverse effects were reported for the remifentanil group.
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Article Synopsis
  • - The study explores using pulse oximetry waveforms to identify aortic dissection (AD), which is often misdiagnosed and can lead to severe complications.
  • - Researchers recruited patients with chest pain from emergency departments, utilizing a random forest algorithm to analyze waveform data alongside demographic information to create a predictive model.
  • - The model showed high accuracy in detecting AD, with an impressive area under the ROC curve of 0.979 in the training set and 0.855 in the external validation set, demonstrating its potential as a diagnostic tool.
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Thoracic aortic aneurysm and dissection (TAAD) is a life-threatening cardiovascular disorder lacking effective clinical pharmacological therapies. The underlying molecular mechanisms of TAAD still remain elusive with participation of versatile cell types and components including endothelial cells (ECs), smooth muscle cells (SMCs), fibroblasts, immune cells, and the extracellular matrix (ECM). The main pathological features of TAAD include SMC dysfunction, phenotypic switching, and ECM degradation, which is closely associated with inflammation and immune cell infiltration.

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Article Synopsis
  • Endothelins and their receptors are crucial for vascular health and can be targeted for treating conditions like pulmonary arterial hypertension.
  • Recent studies using cryo-electron microscopy reveal the structures of endothelin in complex with various PAH drugs, enhancing our understanding of how these drugs interact with receptors.
  • Key findings indicate specific residues that determine antagonist selectivity and suggest potential new strategies for designing drugs and antibodies targeting endothelin receptors.
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Background: No reliable clinical tools exist to predict acute kidney injury (AKI) progression. We aim to explore a scoring system for predicting the composite outcome of progression to severe AKI or death within seven days among early AKI patients after cardiac surgery.

Methods: In this study, we used two independent cohorts, and patients who experienced mild/moderate AKI within 48 h after cardiac surgery were enrolled.

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Background: Skin mottling is a common manifestation of peripheral tissue hypoperfusion, and its severity can be described using the skin mottling score (SMS). This study aims to evaluate the value of the SMS in detecting peripheral tissue hypoperfusion in critically ill patients following cardiac surgery.

Methods: Critically ill patients following cardiac surgery with risk factors for tissue hypoperfusion were enrolled (n = 373).

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Background: Obesity may increase perioperative mortality of acute Stanford type A aortic dissection (ATAAD). However, the available evidence was limited. This study aimed to systematically review published literatures about body mass index (BMI) and perioperative mortality of ATAAD.

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Background: Postoperative patients with Type A aortic dissection (TAAD) often experience severe inflammatory responses caused by multiple factors perioperatively. However, the effect of postoperative glucocorticoid (GC) use, which is a potent anti-inflammatory agent, on complications or all-cause mortality is unclear.

Methods: Patients with TAAD who underwent surgical repair requiring deep hypothermic circulatory arrest between January 2020 and December 2021 were included in the study.

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Background: As patients with acute kidney injury (AKI) progress to a higher stage, the risk for poor outcomes dramatically rises. Early identification of patients at high risk for AKI progression remains a major challenge. This study aimed to evaluate the value of furosemide responsiveness (FR) for predicting AKI progression in patients with initial mild and moderate AKI after cardiac surgery.

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Background: Patients receiving surgical treatment of acute type A Aortic Dissection (aTAAD) are common to suffer organ dysfunction in the intensive care unit due to overwhelming inflammation. Previous studies have revealed that glucocorticoids may reduce complications in certain patient groups, but evidence between postoperative glucocorticoids administration and improvement in organ dysfunction after aTAAD surgery are lacking.

Methods: This study will be an investigator-initiated, prospective, single-blind, randomized, single-center study.

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Tricuspid regurgitation (TR) may occur late after left-sided valve surgery (LSVS). Isolated tricuspid regurgitation after left-sided valve surgery (iTR-LSVS) refers to isolated TR without significant lesions in the mitral and/or aortic position late after mitral and/or aortic replacement or repair. Severe TR has a negative impact on long-term prognosis and requires surgical or transcatheter treatment.

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Background: Sepsis is an abnormal immune response after infection, wherein the lung is the most susceptible organ to fail, leading to acute lung injury. To overcome the limitations of current therapeutic strategies and develop more specific treatment, the inflammatory process, in which T cell-derived extracellular vesicles (EVs) play a central role, should be explored deeply.

Methods: Liquid chromatography-tandem mass spectrometry was performed for serum EV protein profiling.

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Background: Hypoperfusion, a common manifestation of many critical illnesses, could lead to abnormalities in body surface thermal distribution. However, the interpretation of thermal images is difficult. Our aim was to assess the mortality risk of critically ill patients at risk of hypoperfusion in a prospective cohort by infrared thermography combined with deep learning methods.

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