Publications by authors named "Stephanie Cha"

Background And Objectives: Preoperative red blood cell (RBC) transfusions increase post-operative venous thromboembolic (VTE) events. Erythropoietin-stimulating agents (ESAs) increase VTE risk in cancer patients; we aimed to assess ESA versus RBC-associated VTE risks in a broad population of surgical patients.

Materials And Methods: We queried TriNetX Diamond Network from 2006 to 2023, comparing patients with anaemia within 3 months preoperatively who received preoperative ESAs with or without intravenous (IV) iron to patients who received preoperative RBCs.

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Veno-arterial (V-A) and Veno-venous (V-V) extracorporeal membrane oxygenation (ECMO) support is increasingly utilized for acute cardiogenic shock and/or respiratory failure. Echocardiography and point-of-care ultrasonography (POCUS) play a critical role in the selection and management of these critically ill patients, however, there are limited guidelines regarding their application. This comprehensive review describes current and potential application of echocardiography and POCUS for pre-ECMO assessment and patient selection, cannulation guidance with emphasis on dual-lumen configurations, diagnosis of ECMO complications and trouble-shooting of cannula malposition, diagnosis of common cardiac or pulmonary pathologies, and assessment of ECMO weaning appropriateness including identification of the aortic mixing point in V-A ECMO.

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Background: Perioperative red blood cell (RBC) transfusions increase venous thromboembolic (VTE) events. Although a previous study found that plasma resuscitation after trauma was associated with increased VTE, the risk associated with additional perioperative plasma is unknown.

Methods: A US claims and EHR database (TriNetX Diamond Network) was queried.

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Whether through minimally invasive or conventional open techniques, thoracic surgery is often reported to be one of the most painful surgical procedures due to the incision of intercostal and respiratory muscles, rib injury or resection, and placement of surgical drains. Some of the more severe complications related to poor analgesia include prolonged intensive care unit stay, mechanical ventilation, pneumonia, and the development of chronic postoperative pain syndromes. Over the past few decades, much progress has been made in recognizing the importance of multimodal analgesic techniques.

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Article Synopsis
  • The study focused on the prevalence and characteristics of delirium in COVID-19 patients undergoing VV-ECMO, finding that 98% of patients experienced delirium during treatment.
  • Delirium onset occurred around day 9 for both survivors and non-survivors, with non-survivors showing longer periods when delirium assessments were not possible and lower sedation scores.
  • The duration of delirium correlated with sedation levels and the use of neuromuscular blockers, but overall, delirium duration did not predict in-hospital mortality.
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Vascular surgical patients present unique challenges for anesthesiologists, because of their medical vulnerabilities as well as their tendency for rapid intraoperative hemodynamic changes. Intraoperative monitors have been used for decades to reduce adverse outcomes, improve mortality, and create optimal surgical conditions. Understanding the indications and appropriate management of monitoring modalities is essential for optimizing patient care, and preventing harm associated with misinterpretation.

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In appropriately selected patients with COVID-19 acute respiratory distress syndrome, venovenous extracorporeal membrane oxygenation (VV ECMO) may offer a promising bridge to lung recovery or lung transplantation if lung recovery fails. Although the cannulation technique for VV ECMO via a right internal jugular (RIJ) dual-lumen catheter (DLC) requires expertise and guidance by either fluoroscopy or transesophageal echocardiography (TEE), it offers theoretical circulatory support advantages by using bicaval venous drainage to deliver oxygenated blood systemically with minimal recirculation as compared with the femoral vein and RIJ dual-site cannula configuration. In addition, patients are often too unstable to transport safely to an operating room or catheterization laboratory, and fluoroscopy is not always readily available to guide RIJ DLC placement.

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(1) Importance: Abnormal left ventricular (LV) diastolic function, with or without a diagnosis of heart failure, is a common finding that can be easily diagnosed by intra-operative transesophageal echocardiography (TEE). The association of diastolic function with duration of hospital stay after coronary artery bypass (CAB) is unknown. (2) Objective: To determine if selected TEE parameters of diastolic dysfunction are associated with length of hospital stay after coronary artery bypass surgery (CAB).

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Background: Reducing depth of anesthesia and anesthetic exposure may help prevent delirium, but trials have been conflicting. Most studies were conducted under general anesthesia or in cognitively impaired patients. It is unclear whether reducing depth of anesthesia beyond levels consistent with general anesthesia reduces delirium in cognitively intact patients.

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Article Synopsis
  • - A 70-year-old male with no coronary artery disease history and normal heart function developed severe heart issues during surgery for a liver transplant due to an acute myocardial infarction.
  • - The intra-operative heart dysfunction required the insertion of an intra-aortic balloon pump to improve blood flow to the heart but was complicated by bleeding and clotting problems.
  • - After stabilizing the patient's bleeding, doctors performed a coronary angiography and inserted a stent to repair a ruptured plaque in the coronary artery.
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Iatrogenic aortic injury is a rare but potentially lethal complication of cardiac surgery. While sometimes resulting in aortic dissection or intramural hematoma, injury more frequently results in subadventitial hematoma, a more benign pathology. Here, we describe a case where intraoperative transesophageal echocardiography (TEE) identified such a hematoma but was unable to rule out dissection.

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Sepsis and septic shock are medical emergencies, with high associated mortality. The Surviving Sepsis Campaign has developed definitions and management guidelines, emphasizing the use of hour-1 care bundle. Anesthesiologists frequently encounter sepsis when source control is required.

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Objective: Previous computer simulations of shoulder dystocia (SD) explored the effect of SD itself on the mechanical response of the fetus. Our objective was to perform a mechanical simulation study to explore the variations in fetal response during routine, unilateral SD (USD), and bilateral SD (BSD) deliveries.

Study Design: Using a biofidelic birthing simulator, we performed 30 experiments mimicking passage of the fetus through the pelvis.

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TNF can potentiate IFN-gamma production by activated T cells and other members of the TNF-superfamily play key roles in this effect. A newly discovered TNF-superfamily cytokine (TL1A) could also be involved in initiating or promoting the Th1 response by enhancing IFN-gamma production. The purpose of this study was to assess the role of recombinant TL1A on IFN-gamma production by cultured PBMC and lamina propria LPMC and to determine whether TL1A expression is altered in inflammatory bowel disease.

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TL1A, a recently described TNF-like cytokine that interacts with DR3, costimulates T cells and augments anti-CD3 plus anti-CD28 IFN-gamma production. In the current study we show that TL1A or an agonistic anti-DR3 mAb synergize with IL-12/IL-18 to augment IFN-gamma production in human peripheral blood T cells and NK cells. TL1A also enhanced IFN-gamma production by IL-12/IL-18 stimulated CD56(+) T cells.

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