Publications by authors named "Byungjoon Park"

Article Synopsis
  • * The SEB operates wirelessly using a continuous 60-Hz sinusoidal electrical potential derived from the human body and surrounding electrical waves, enhanced by a special composite material.
  • * Preclinical studies show that SEBs can significantly accelerate wound recovery, suggesting their potential application in various wound care technologies.
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Chest wall reconstruction is challenging due to the complex shape and large defect size. The three-dimensional printing technology enables the fabrication of customized implants, and 3D-printed pure-titanium could provide superior mechanical properties to conventional materials. The aim of this study was to evaluate long-term outcomes of patients undergoing chest wall reconstruction with a 3D-printed pure-titanium implant.

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Bioresorbable bioelectronics, with their natural degradation properties, hold significant potential to eliminate the need for surgical removal. Despite notable achievements, two major challenges hinder their practical application in medical settings. First, they necessitate sustainable energy solutions with biodegradable components via biosafe powering mechanisms.

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Article Synopsis
  • The text discusses advancements in implantable bioelectronics focused on creating devices that can be used semipermanently with safe energy sources and protective packaging.
  • It introduces a new type of triboelectric implant that is powered by ultrasound, is miniatured, battery-free, and made with full titanium packaging, achieving high energy transmission efficiency.
  • An in vivo study with rats shows that this device effectively relieves urinary symptoms, representing a significant leap towards permanent implants for controlling organs and treating diseases.
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General anesthesia providing one-lung ventilation (OLV) with double-lumen endotracheal intubation has been considered inevitable for thoracic surgery. However, with the recent trend of less invasive surgical technique and enhanced recovery after surgery, tubeless anesthesia has been performed in various thoracic surgeries. The aim of this study was to establish a feasible and safe strategy of ventilator-assisted tubeless anesthesia in video-assisted thoracoscopic surgeries (VATS) based on single-institution experiences.

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Implantable medical devices (IMDs) provide practical approaches to monitor physiological parameters, diagnose diseases, and aid treatment. However, device installation, maintenance, and long-term implantation increase the risk of infection with conventional IMDs. Therefore, medical devices with biocompatibility, controllability, and miniaturization are highly demandable.

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A bioadhesive triboelectric nanogenerator (BA-TENG), as a first-aid rescue for instant and robust wound sealing and ultrasound-driven accelerated wound healing, is designed. This BA-TENG is fabricated with biocompatible materials, and integrates a flexible TENG as the top layer and bioadhesive as the bottom layer, resulting in effective electricity supply and strong sutureless sealing capability on wet tissues. When driven by ultrasound, the BA-TENG can produce a stable voltage of 1.

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To prevent surgical site infection (SSI), which significantly increases the rate morbidity and mortality, eliminating microorganisms is prominent. Antimicrobial resistance is identified as a global health challenge. This work proposes a new strategy to eliminate microorganisms of deep tissue through electrical stimulation with an ultrasound (US)-driven implantable, biodegradable, and vibrant triboelectric nanogenerator (IBV-TENG).

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Background: This study aimed to investigate the early and late outcomes of mechanical tricuspid valve replacement (mTVR).

Methods: We evaluated 113 patients (82 women; median age, 53 years) who underwent mTVR between 1995 and 2017. Based on a history of cardiac surgery, patients were divided into primary (n=42) and reoperative mTVR (n=71) groups.

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Omega-3 polyunsaturated fatty acids (ω3-PUFAs) have potential protective activity in a variety of infectious diseases, but their actions and underlying mechanisms in infection remain poorly understood. Here, we report that docosahexaenoic acid (DHA) robustly induced autophagy in murine bone marrow-derived macrophages (BMDMs). Treatment of -infected macrophages with DHA resulted in colocalization of parasitophorous vacuoles with autophagosomes and reduced intracellular survival of .

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Objective: To quantify the degree of lethal and sublethal damage to red blood cells (RBCs) by cell saver (CS) processing among different conditions of shed blood in cardiac surgery.

Design: Prospective randomized, double-blinded, controlled study.

Setting: Single university hospital.

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Stellaria dichotoma var. lanceolata (SdLv), a member of the Caryophyllaceae, is a traditional herbal medicine that has been used to treat fever, night sweats, and malaria in East Asia. Inflammation plays an essential role in both host defense and pathogenesis during infection by diverse intracellular pathogens.

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Background: This study aimed to evaluate the early and late clinical outcomes after repeat aortic valve replacement (AVR) for subaortic pannus in patients with mechanical valves.

Methods and results: Between 2001 and 2017, 51 patients (median age, 59 years; 42 women) with prosthetic aortic stenosis (AS) caused by pannus ingrowth underwent repeat AVR because of acute malfunction of monoleaflet valve (3 patients), severe prosthetic AS (30 patients), and moderate prosthetic AS at the time of tricuspid or mitral valve surgery (18 patients). The median follow-up duration was 100 (interquartile range, 64-138) months.

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Background: The aim of this study was to analyze the surgical outcomes of locally advanced lung cancer invading the great vessels or heart, according to the extension of cancer invasion.

Methods: From 1995 to 2015, 59 patients who were surgically treated and pathologically diagnosed with T4N0-1 non-small cell lung cancer with invasion to the great vessels or heart were enrolled. Surgical outcomes were compared between patient groups with and without intrapericardial invasion.

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Background: This study aimed to evaluate the safety and feasibility of transaortic mitral pannus removal (TMPR).

Methods and results: Between 2004 and 2016, 34 patients (median age, 57 years; 30 women) with rheumatic disease underwent pannus removal on the ventricular side of a mechanical mitral valve through the aortic valve during reoperation. The median time interval from the previous surgery was 14 years.

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Nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (Nox) are an important family of catalytic enzymes that generate reactive oxygen species (ROS), which mediate the regulation of diverse cellular functions. Although phagocyte Nox2/gp91phox is closely associated with the activation of host innate immune responses, the roles of Nox family protein during Toxoplasma gondii (T. gondii) infection have not been fully investigated.

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Immunoglobulin G4 (IgG4)-related sclerosing disease is a recently proposed systemic fibroinflammatory disease entity, with periaortitis as a representative manifestation in the cardiovascular system. We present a case of IgG4-related periaortitis involving the aortic arch and proximal great vessels, mimicking an anterior mediastinal tumor on computed tomography. In patients with a soft tissue mass along the aortic wall, IgG4-related periaortitis should be included as a differential diagnosis and timely serologic investigation should be performed to prevent unnecessary surgery, because the disease shows a remarkable response to corticosteroids.

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We present a case of retained placenta accreta treated by high-intensity focused ultrasound (HIFU) ablation followed by hysteroscopic resection. The patient was diagnosed as submucosal myoma based on ultrasonography in local clinic. Pathologic examination of several pieces of tumor mass from the hysteroscopic procedure revealed necrotic chorionic villi with calcification.

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 In patients with synchronous esophageal and gastric cancers, selecting an optimal conduit for esophageal reconstruction is a critical decision. The aim of this study was to evaluate the surgical outcomes after simultaneous resection of esophageal and gastric cancers according to the type of esophageal conduit used.  Clinicopathologic features and surgical outcomes were analyzed in 66 patients who underwent esophageal reconstruction with colon ( = 41, group C), jejunum ( = 11, group J), and stomach ( = 14, group S).

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Background: Age has been a critical predictor for immediate postoperative and long-term results after the pulmonary resection for lung cancer. In this study, we evaluated and compared surgical outcome of stage I non-small cell lung cancer and associated predictive factors between elderly and younger groups.

Methods: Short- and long-term outcomes of elderly group (≥70 years) who were surgically treated and pathologically diagnosed as stage I non-small cell lung cancer from 2004 to 2010 were compared to the results of younger group (<70 years).

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[Purpose] This study was performed to provide evidence for the therapeutic exercise approach through a compative analysis of muscle activities according to climbing wall inclination. [Subjects and Methods] Twentyfour healthy adult subjects without climbing experience performed static exercises at a therapeutic climbing at with various inclination angles (0°, 10°, 20°), and the activities of the trunk muscles (rectus abdominis, obliquus externus abdominis, obliquus internus abdominis, erector spinae) were measured using surface electromyography (EMG) for 7 seconds. [Results] Significant differences were found between the inclination angles of 10° and 0°, as well as 20° in the rectus abdominis, obliquus internus abdominis, right obliquus externus abdominis, and right erector spinae.

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Background Aims: Perinatal tissues are considered an attractive source of mesenchymal stem/stromal cells (MSCs) and have unique characteristics depending on their origin. In this study, we compared the basic characteristics of unrestricted somatic stem cells isolated from cord blood (CB-USSCs) and MSCs isolated from Wharton's jelly of umbilical cords (WJ-MSCs). We also evaluated the effect of basic fibroblast growth factor (bFGF) supplementation on the growth and differentiation of these cells.

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Aim: To identify alkyl hydroperoxide reductase subunit C (AhpC) homologs in Bacillus subtilis (B. subtilis) and to characterize their structural and biochemical properties. AhpC is responsible for the detoxification of reactive oxygen species in bacteria.

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Background: Lobectomy is the generally accepted standard treatment for early-stage non-small cell lung cancer (NSCLC). However, especially in elderly patients, it is often necessary to perform pneumonectomy in order to maximize the likelihood of curative treatment, although pneumonectomy is a challenging procedure.

Methods: We analysed patients who were clinically diagnosed with stage I NSCLC and underwent pneumonectomy with curative intent from 2004 to 2011.

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