Publications by authors named "Chih-Heng Chang"

Article Synopsis
  • This study examines the impact of point-of-care ultrasound (PoCUS) on hospital length of stay (LOS) and mortality rates in stable patients experiencing chest pain or dyspnea between June 2020 and May 2021.
  • Out of 465 patients, findings showed that PoCUS had minimal influence on LOS and mortality for those with ST-segment elevation (STE) but significantly reduced LOS and improved survival in non-STE patients, especially when administered within 90 minutes of arrival.
  • The study concluded that while PoCUS is beneficial for non-STE cases and helps identify unforeseen conditions, its effects on STE patients were limited despite a high overall diagnostic accuracy of 96.6%.*
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Introduction: Whether ultrasonography (US) contributes to delays in chest compressions and hence a negative impact on survival is uncertain. In this study we aimed to investigate the impact of US on chest compression fraction (CCF) and patient survival.

Methods: We retrospectively analyzed video recordings of the resuscitation process in a convenience sample of adult patients with non-traumatic, out-of-hospital cardiac arrest.

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Background: Current studies assessed the learning efficacy of e-learning in ultrasound (US) training using questionnaires, or simulation in well-controlled conditions. This study investigates the effect of e-learning on the clinical US performance of the first postgraduate year (PGY-1) residents.

Methods: In this prospective observational study, we enrolled PGY-1 and second postgraduate year (PGY-2) residents.

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Aim: Little is known regarding the actual utilization of point-of-care ultrasound (PoCUS) after training. This study aims to investigate the clinical utilization of PoCUS by first post-graduate year (PGY-1) residents after training.

Material And Methods: This prospective study was conducted at the emergency department (ED).

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The US-CAB (Ultrasound, Circulation/Airway/Breathing) protocol integrates several sonographic techniques into a structured assessment of the circulation, airway, and breathing status of a patient during cardiopulmonary resuscitation (CPR) in an advanced life support-compliant manner. US-C provides a subxiphoid view of the heart, to look for potentially reversible causes of disease, such as pericardial effusion, pulmonary embolism, hypovolemia, and acute coronary thrombosis. Sonographic cardiac activity during CPR not only helps differentiate pseudo-pulseless electrical activity (PEA) from true PEA but also represents a higher chance of the return of spontaneous circulation (ROSC) and survival.

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Background: Diagnosis of gastrointestinal stromal tumors (GISTs) in the distal small intestine is difficult by endoscopic ultrasound. This is the first reported case of an ileal GIST, which is diagnosed by transabdominal sonography and strain elastography.

Case Presentation: A 75 y/o woman presented with tarry stool and dizziness.

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Palpebral emphysema is a rare occurrence after a dental procedure. However, it can be associated with severe complications, such as soft tissue infection, pneumomediastinum, pneumothorax, optic nerve ischemia or even blindness. Early diagnosis and prompt management are mandatory for emergency physicians.

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