Publications by authors named "Byeongcheol Lee"

Introduction: This case report presents an instance of an S-Series™ slim paddle lead fracturing during extraction, highlighting potential risks associated with the removal of this lead.

Case Report: A 47-year-old male with complex regional pain syndrome type 2, unresponsive to pharmacotherapy, had undergone the implantation of two spinal cord stimulator (SCS) leads, an Octrode™ cylindrical and an S-series™ slim paddle, using the Epiducer™ system (St Jude Medical) 9 years earlier, with a subsequent intrathecal baclofen pump installed 1 year after SCS. Initially, these interventions stabilized the patient's pain symptoms.

View Article and Find Full Text PDF

For perioperative hypothermia prevention, a heated, humidified breathing circuit equipped with a fluid-warming unit inside the inspiratory limb has been developed. We report a ventilation difficulty caused by an obstructed heated breathing circuit. Cotton surrounding the hot wire, temperature sensor, and fluid tubing in the distal inspiratory limb was irregularly thicker than that of a normal circuit and nearly blocked the lumen.

View Article and Find Full Text PDF

We report a case of transurethral resection of the prostate (TURP) syndrome with mild hyponatremia, severe lactic acidosis, and hypotension. A 73-year-old man with benign prostatic hyperplasia underwent monopolar TURP. Two episodes of hypotension occurred during the operation.

View Article and Find Full Text PDF

BACKGROUND Herpes zoster caused by the reactivation of latent varicella-zoster virus is thought to result from the waning of specific cell-mediated immunity. Scrub typhus, an acute infectious disease caused by Orientia tsutsugamushi, affects multiple organs and is characterized by microangiopathies that result in significant vascular leakage and subsequent end-organ injury. Very few cases of reactivation of the varicella-zoster virus following scrub typhus occurrence have been reported.

View Article and Find Full Text PDF

Background and Objectives: Evidence regarding the prevalence of neuropathic pain in patients with cervical radicular pain is limited. This study aimed to investigate the prevalence of neuropathic pain components in patients with cervical radicular pain using established screening tools and identify the relationship between neuropathic pain components and clinical factors. Materials and Methods: Data from 103 patients (aged ≥ 20 years) with cervical radicular pain who visited our pain clinic were analyzed retrospectively.

View Article and Find Full Text PDF

Although echocardiography is widely used for preoperative cardiac risk evaluation, few studies have analyzed the effect of performing preoperative echocardiography on intraoperative anesthetic management and postoperative outcomes. We investigated the effect of performing echocardiography on intraoperative anesthetic management and postoperative outcomes in patients with cardiovascular risk. We retrospectively evaluated patients who had undergone major abdominal surgery and satisfied 2 or more of the following criteria: hypertension, diabetes mellitus, age ≥70 years, and previous cardiac disease.

View Article and Find Full Text PDF

Objectives: This study aimed to present our experiences with various approaches for endoscopic thyroidectomy (ET) and to offer lessons for choosing an approach.

Methods: The medical records of 701 patients who underwent ET via the transaxillary (TA), bilateral axillo-breast (BABA), unilateral axillo-breast with carbon dioxide insufflation (UABA), retroauricular (RA), or transoral vestibular (TO) approach between May 2008 and March 2020 were retrospectively reviewed. Postoperative pain and cosmetic outcomes were evaluated using visual analog scales.

View Article and Find Full Text PDF

Background: Strabismus surgery and the use of opioid are risk factors of postoperative vomiting. We evaluated whether there is a dose-dependent effect of remifentanil on the incidence of postoperative vomiting.

Methods: Sixty pediatric patients who were scheduled for strabismus surgery were enrolled.

View Article and Find Full Text PDF

The purpose of this study aims at segmenting the urban forest users' market by motivation and analyzing the difference in perceived effects of urban forests. Based on a literature review, the study selected seven motivating factors of urban forest users: experiential activity, relaxatin/healing, health management, escape from everday life, daily leisure, affinity toward nature. Data were collected online from 21 to 29 Sepember 2020 with urban forest visitors.

View Article and Find Full Text PDF

Despite the unique characteristics of urban forests, the motivating factors of urban forest visitors have not been clearly differentiated from other types of the forest resource. This study aims to identify the motivating factors of urban forest visitors, using latent Dirichlet allocation (LDA) topic modeling based on social big data. A total of 57,449 cases of social text data from social blogs containing the keyword "urban forest" were collected from Naver and Daum, the major search engines in South Korea.

View Article and Find Full Text PDF

Introduction: Leriche syndrome is an aortoiliac occlusive disease caused by atherosclerotic occlusion. We report a case of Leriche syndrome with a fracture that was suspected as complex regional pain syndrome (CRPS), as the post-traumatic pain gradually worsened in the form of excruciating neuropathic pain.

Case Report: A 52-year-old woman with a history of hypertension was referred to the Department of Pain Medicine from a local orthopedic clinic because of suspected CRPS for excruciating neuropathic pain for one month.

View Article and Find Full Text PDF

Pathology of the lumbar spine and hip joint can commonly coexist in the elderly. Anterior and lateral leg pain as symptoms of hip osteoarthritis and spinal stenosis can closely resemble each other, with only subtle differences in both history and physical examinations. It is not easy to identify the origin of this kind of hip pain.

View Article and Find Full Text PDF

Background And Objectives: Non-linear frequency compression (NLFC) technology compresses and shifts higher frequencies into a lower frequency area that has better residual hearing. Because consonants are uttered in the high-frequency area, NLFC could provide better speech understanding. The aim of this study was to investigate the clinical effectiveness of NLFC technology on the perception of speech and music in patients with high-frequency hearing loss.

View Article and Find Full Text PDF

The purpose of this study was to compare and to analyze contrast spread patterns between the paramedian and midline approaches to cervical interlaminar epidural injection (CIEI). We retrospectively enrolled 84 CIEI cases that had been performed for unilateral cervical spinal pain from April 2019 to April 2020. After 3 mL of contrast had been injected into the epidural space, fluoroscopic images were obtained.

View Article and Find Full Text PDF

A 76-year-old man with no notable medical history was scheduled for a robot-assisted radical prostatectomy. After the operation, he was given sugammadex. Two minutes later, ventricular premature contraction bigeminy began, followed by cardiac arrest.

View Article and Find Full Text PDF

Bispectral index (BIS) is a reliable parameter for measuring depth of hypnotic level during anesthesia. Convective air warming system is an effective equipment to maintain normothermia during operation. We report falsely elevated BIS value due to convective air warming system while undergoing kidney transplantation.

View Article and Find Full Text PDF

Backgrounds: The heartbeat is fundamental cardiac activity which is straightforwardly detected with a variety of measurement techniques for analyzing physiological signals. Unfortunately, unexpected noise or contaminated signals can distort or cut out electrocardiogram (ECG) signals in practice, misleading the heartbeat detectors to report a false heart rate or suspend itself for a considerable length of time in the worst case. To deal with the problem of unreliable heartbeat detection, PhysioNet/CinC suggests a challenge in 2014 for developing robust heart beat detectors using multimodal signals.

View Article and Find Full Text PDF

Background: Recently, various endoscopic thyroidectomy techniques have been introduced for cosmetic purposes. However, few reports have compared the quality of life (QOL) between post-endoscopic thyroidectomy and post-conventional open thyroidectomy. In this study, we investigated whether endoscopic thyroidectomy was comparable to conventional open thyroidectomy with respect to QOL.

View Article and Find Full Text PDF

Objectives: We investigated the expression of oestrogen receptors (ERs) in papillary thyroid cancers (PTCs) and evaluated their prognostic role.

Methods: We enrolled 81 female patients who underwent thyroid surgery and had a confirmed diagnosis of PTC between 01 January 1995 and 31 December 1996. Data on clinicopathologic parameters were obtained from patients' medical records.

View Article and Find Full Text PDF

Background: Gasless transaxillary approach (TA) and the bilateral axillo-breast approach (BABA) are 2 distinctive approaches for endoscopic thyroidectomy. The purpose of this study was to evaluate and compare these 2 procedures.

Methods: From May 2008 to July 2011, we performed endoscopic hemithyroidectomy via gasless TA (83 cases) and BABA (45 cases).

View Article and Find Full Text PDF