Sungkyunkwan University · 医学
Professor Hyun Joo Ahn's research lab focuses on translational critical care and oncology, with a strong emphasis on perioperative medicine in thoracic surgery. The lab investigates novel therapeutic strategies for cancer, particularly exploring repurposed drugs like phenformin and morphine through mechanisms involving mitochondrial function, oxidative stress, and receptor signaling. It also examines respiratory protective strategies, including protective ventilation and hemodynamic management, to improve outcomes in high-risk surgical patients. A recurring theme is the intersection of cancer biology, pain management, and critical care interventions to enhance survival and reduce complications.
Figures are computed from collected data and may differ slightly.
Phenformin (phenethylbiguanide; an anti-diabetic agent) plus oxamate [lactate dehydrogenase (LDH) inhibitor] was tested as a potential anti-cancer therapeutic combination. In in vitro studies, phenformin was more potent than metformin, another biguanide, recently recognized to have anti-cancer effects, in promoting cancer cell death in the range of 25 times to 15 million times in various cancer cell lines. The anti-cancer effect of phenformin was related to complex I inhibition in the mitochondr
Fluid restriction neither increased nor was a risk factor for AKI. HES should be administered with caution in high-risk patients undergoing thoracic surgery.
Dynamic preload indicators are not useful for predicting fluid responsiveness in VATS or open thoracic surgery.
Lung cancer tissues and cell lines express OGFR. Morphine interacts with OGFR and may suppress lung cancer progression.
Pain-control methods are not related to cancer recurrence. However, PVB may have a beneficial effect on overall survival of patients with lung cancer.
Protective ventilation is a prevailing ventilatory strategy these days and is comprised of small tidal volume, limited inspiratory pressure, and application of positive end-expiratory pressure (PEEP). However, several retrospective studies recently suggested that tidal volume, inspiratory pressure, and PEEP are not related to patient outcomes, or only related when they influence the driving pressure. Therefore, this review introduces the concept of driving pressure and looks into the possibility
In conclusion, robotic thoracoscopic esophagectomy lowers the incidence of POD 0.55-fold compared with open transthoracic esophagectomy.
Recent papers suggest protective ventilation (PV) as a primary ventilation strategy during one-lung ventilation (OLV) to reduce postoperative pulmonary morbidity. However, data regarding the advantage of the PV strategy in patients with normal preoperative pulmonary function are inconsistent, especially in the case of minimally invasive thoracic surgery. Therefore we compared conventional OLV (VT 10 ml/kg, FiO2 1.0, zero PEEP) to protective OLV (VT 6 ml/kg, FiO2 0.5, PEEP 5 cmH2O) in patients wi
Atrial fibrillation is the most frequent arrhythmia after thoracic surgery and is associated with increased hospital costs, morbidity and mortality. In this study, we aimed to identify potentially modifiable risk factors for postoperative atrial fibrillation following lung resection surgery and to suggest possible measures to reduce risk. We retrospectively reviewed the medical records of 4731 patients who underwent lobectomy or more major lung resection over a 6-year period. Patients who develo
This result shows that TEA was not beneficial to reduce the incidence of arrhythmias in the transthoracic esophagectomy patients.
The use of skull block during EDAMS surgery provided easy hemodynamic control, calm awakening, and better pain relief and may be related to the reduced postoperative morbidity.
Systemic oxygen delivery (DO<sub>2</sub>) is a more comprehensive marker of patient status than arterial oxygen saturation (SaO<sub>2</sub>), and DO<sub>2</sub> in the range of 330-500 mL min<sup>-1</sup> is reportedly adequate during anaesthesia. We measured DO<sub>2</sub> during one-lung ventilation (OLV) for thoracic surgery-where the risk of pulmonary shunt is significant, and hypoxia occurs frequently-and compared sevoflurane and propofol, the two most commonly used anaesthetics in terms of
Paraesthesia during regional anaesthesia is an unpleasant sensation for patients and, more importantly, in some cases it is related to neurological injury. Relatively few studies have been conducted on the frequency of paraesthesia during combined spinal epidural anaesthesia. We compared two combined spinal epidural anaesthesia techniques: the needle-through-needle technique and the double segment technique in this respect. We randomly allocated 116 parturients undergoing elective Caesarean sect
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