Publications by authors named "Jeong-Heon Park"

Article Synopsis
  • Maladaptive feeding behaviors are identified as a leading cause of obesity in modern society, and while research on the lateral hypothalamic area (LHA) and its influence on eating exists for rodents, similar studies in primates were lacking.
  • A study involving three macaques utilized chemogenetics to activate LHA GABAergic neurons, revealing that this activation increased goal-directed eating behaviors and heightened motivation for palatable food.
  • The research confirmed the effects using imaging techniques, showing that LHA activation enhanced connectivity with frontal brain areas while reducing connectivity among those areas, suggesting potential implications for understanding obesity therapies in both primates and humans.
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Chemical and physical elements affecting the production of bacterial extracellular vesicles (BEVs) of the human pathogen were quantitatively assessed to optimize the conditions for the BEV production by using the western blot quantification for an outer membrane porin OmpU and by fluorescent dye FM4-64. When cells were cultured at 37°C in an enriched medium (2 × Luria Bertani; 2 × LB) in the presence of EDTA, they produced about 70% more BEVs. BEVs were purified from the cells cultured in the established optimal conditions by the density gradient ultracentrifugation.

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Background: Major depressive disorder (MDD) is characterized by depressed mood or loss of interest or pleasure. Generally, women are twice as likely as men to have depression. Taurine, a type of amino acid, plays critical roles in neuronal generation, differentiation, arborization, and formation of synaptic connections.

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Central venous catheter (CVC) insertion is commonly used in the operating room and intensive care unit to monitor central venous pressure and secure an intravenous route to deliver medications and nutritional support that cannot be safely infused into peripheral veins. However, CVC insertion may be associated with serious complications such as arterial puncture, hematoma, pneumothorax, hemothorax, catheter infections, and thrombosis. Several methods have been recommended to prevent these complications.

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Background: Morbidly adherent placenta (MAP) may cause life-threatening postpartum hemorrhage (PPH) requiring massive transfusions. Furthermore, it could endanger the lives of both mother and baby. Despite various efforts, such as adjuvant endovascular embolization and hysterectomy, massive PPH due to MAP still occurs and is difficult to overcome.

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Background: Tracheostomy tube exchange is a common and safe procedure. However, when the tracheocutaneous tract is not completely mature, cannula exchange or endotracheal tube insertion via the tracheostomy site can rarely induce life-threatening complications, including subcutaneous emphysema, loss of airway, tension pneumothorax, and pneumoperitoneum.

Case: We report a case of life-threatening tension pneumothorax developed during tracheostomy tube exchange with a reinforced endotracheal tube for a planned facial surgery after recent tracheostomy in a trauma patient.

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Background: Endotracheal intubation can cause focal ischemia, damage or edema to the laryngeal mucosa, and may be followed by serious complications such as vocal cord paralysis, ulcers, and granulation tissue formation. Laryngeal granuloma is rare but also a significant late complication of endotracheal intubation, and anesthesiologists should be concerned about it.

Case: We experienced four cases of laryngeal granuloma that developed after two-jaw surgery January 2017-December 2018 in our hospital and would like to report these cases with brief review of literature.

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A dental bridge impacted in the esophagus of a 43-year-old man was successfully removed using endoscopy, without any further complications. It is of utmost importance that the medical staff carefully assess the patient's dental condition, provide clear documentation, and notify the patient appropriately to prevent dental prosthesis-related complications and claims. Anesthesiologists also need to be more cautious in the perioperative period, even after extubation, because this complication may not be completely avoidable.

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We report an anesthetic experience in a clinically euthyroid patient with hyperthyroxinemia (elevated free thyroxine, fT4 and normal 3, 5, 3'-L-triiodothyronine, T3) and suspected impairment of conversion from T4 to T3. Despite marked hyperthyroxinemia, this patient's perioperative hemodynamic profile was suspected to be the result of hypothyroidism, in reference to the presence of T4 to T3 conversion disorder. We suspected that pretreatment with antithyroid medication before surgery, surgical stress and anesthesia may have contributed to the decreased T3 level after surgery.

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Pulmonary aspiration of gastric contents is one of the most frightening complications during anesthesia. Although pulmonary aspiration of gastric contents in general surgical patients is not common and resulting long-term morbidity and mortality are rare, severe hypoxemia and other sequelae of pulmonary aspiration continue to be reported. We report a case of massive aspiration of gastric contents during induction of general anesthesia, resulting in cardiac arrest due to severe pulmonary hypertension and myocardial infarction.

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Many factors are associated with the development of low back pain. Among them, exercise, obesity, smoking, age, educational level and stress are the most common. This study examined the association of these factors with low back pain.

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