1.Current Concepts in Management of Phalangeal Fractures
Yohan LEE ; Sunghun PARK ; Jun-Ku LEE
Journal of the Korean Fracture Society 2022;35(4):169-181
This review focused on the research published to date on the treatment of phalangeal fractures according to the anatomical location of the finger bones, excluding the thumb. In many finger fracture cases, conservative treatment should be prioritized over surgical treatment. The three determinants of surgical treatment are the presence of an intra-articular fracture, the stability of the fracture itself, and the degree of damage to the surrounding soft tissues. Surgical treatment is recommended when bone fragments of 3 mm or more and distal phalanx subluxation are present in the bony mallet finger, and the main surgical treatment is closed reduction and extension block pin fixation. It is essential to pay attention to rotational deformation asf ractures occur proximally. Since intra-articular fractures can cause stiffness and arthritis in the future, a computed tomography scan is recommended to confirm the fracture pattern. These fractures require anatomical reduction of the bone fragments within the joint, and the instability of the joint itself must be corrected. There are no superior surgical treatment methods. It is therefore advantageous for the surgeon to select a surgical method that he is familiar with and confident of performing, considering the fracture itself and various patient-related clinical factors. Nonunion is rare as a complication of a finger fracture, and finger stiffness is the most common complication. Ensuring rapid joint movement as soon as possible can reduce finger stiffness.
2.The Latest Trends in Attention Mechanisms and Their Application in Medical Imaging
Hyungseob SHIN ; Jeongryong LEE ; Taejoon EO ; Yohan JUN ; Sewon KIM ; Dosik HWANG
Journal of the Korean Radiological Society 2020;81(6):1305-1333
Deep learning has recently achieved remarkable results in the field of medical imaging. However, as a deep learning network becomes deeper to improve its performance, it becomes more difficult to interpret the processes within. This can especially be a critical problem in medical fields where diagnostic decisions are directly related to a patient's survival. In order to solve this, explainable artificial intelligence techniques are being widely studied, and an attention mechanism was developed as part of this approach. In this paper, attention techniques are divided into two types: post hoc attention, which aims to analyze a network that has already been trained, and trainable attention, which further improves network performance. Detailed comparisons of each method, examples of applications in medical imaging, and future perspectives will be covered.
3.The Latest Trends in Attention Mechanisms and Their Application in Medical Imaging
Hyungseob SHIN ; Jeongryong LEE ; Taejoon EO ; Yohan JUN ; Sewon KIM ; Dosik HWANG
Journal of the Korean Radiological Society 2020;81(6):1305-1333
Deep learning has recently achieved remarkable results in the field of medical imaging. However, as a deep learning network becomes deeper to improve its performance, it becomes more difficult to interpret the processes within. This can especially be a critical problem in medical fields where diagnostic decisions are directly related to a patient's survival. In order to solve this, explainable artificial intelligence techniques are being widely studied, and an attention mechanism was developed as part of this approach. In this paper, attention techniques are divided into two types: post hoc attention, which aims to analyze a network that has already been trained, and trainable attention, which further improves network performance. Detailed comparisons of each method, examples of applications in medical imaging, and future perspectives will be covered.
4.Case Series of Different Onset of Skin Metastasis According to the Breast Cancer Subtypes.
Junhyeon CHO ; Yohan PARK ; Jong Chan LEE ; Woo Jin JUNG ; Soohyeon LEE
Cancer Research and Treatment 2014;46(2):194-199
We report on five cases of skin metastasis according to the breast cancer (BC) subtype. Two cases of HER2 positive BC showed only skin metastasis after immediate postoperative period and rapid clinical response to targeted therapy. Another two cases of triple negative BC showed thyroid and lung metastasis in addition to skin metastasis, and their response of cytotoxic chemotherapy was not definite. The other hormone positive BC showed skin metastasis only, with a longer, slower, less progressive pattern than other subtypes. Most cases of skin metastasis were detected at terminal stage of malignancy and were considered to have a limited survival period. However, some BC patients can survive longer if the targeted agents are effective. Therefore, physicians should provide detailed follow up of BC after curative treatment and understand the metastatic pattern of BC according to the subtype.
Breast Neoplasms*
;
Drug Therapy
;
Humans
;
Lung
;
Neoplasm Metastasis*
;
Postoperative Period
;
Skin Neoplasms
;
Skin*
;
Thyroid Gland
5.The Innervated Distally Based First Dorsal Metatarsal Artery Flap with a Wide Pedicle for Reconstruction of a Great Toe Defect
Yohan LEE ; Young Ho LEE ; Min Bom KIM ; Jisu PARK ; Goo Hyun BAEK
Clinics in Orthopedic Surgery 2019;11(3):325-331
BACKGROUND: It is difficult for surgeons to reconstruct soft tissue defects of the great toe. This report aims to evaluate the utility and efficacy of innervated distally based first dorsal metatarsal artery (FDMA) flap with a wide pedicle for reconstruction of soft tissue defects of the great toe. METHODS: This is a retrospective report. Between January 2015 and December 2017, six cases of skin defect of the great toe were reconstructed with an innervated distally based FDMA flap with a wide pedicle. One case was excluded in this report because of chronic pain on the metatarsophalangeal joint due to osteoarthritis before the injury. A total of five cases were evaluated for flap survival and sensory recovery. The sensory recovery was investigated by two-point discrimination and Semmes-Weinstein monofilament tests. The average age of the selected patients was 40 years (range, 36 to 56 years), and the average size of the defect in the toe was 8.3 cm2 (range, 4 to 13.8 cm2). The average follow-up period was 29.4 months (range, 18 to 38 months). RESULTS: All patients survived without any complications. The average two-point discrimination test value was 8.0 ± 0.89 mm (range, 7 to 9 mm), and the average value obtained from the Semmes-Weinstein monofilament test was 4.53 ± 0.33 (range, 4.17 to 4.93). The average residual pain score evaluated with a visual analog scale was 1 (range, 0 to 2). Two patients complained of stiffness in the great toe below 30° of total range of motion during the early stages after surgery, but this stiffness gradually improved after rehabilitation. The average range of motion of three patients with a remaining metatarsophalangeal joint after surgery was 80° (range, 70° to 90°). All five cases could walk regularly without any unique footwear at the final follow-up. CONCLUSIONS: The innervated distally based FDMA flap with a wide pedicle could be a good alternative method for repair of soft tissue defects of the great toe.
Arteries
;
Chronic Pain
;
Discrimination (Psychology)
;
Follow-Up Studies
;
Humans
;
Metatarsal Bones
;
Metatarsophalangeal Joint
;
Methods
;
Osteoarthritis
;
Perforator Flap
;
Range of Motion, Articular
;
Rehabilitation
;
Retrospective Studies
;
Skin
;
Surgeons
;
Toes
;
Visual Analog Scale
6.Development of Virtual Reality-based Visual Perception and Cognitive Rehabilitation Service
YoHan SONG ; JinCheol KIM ; JeongA LEE ; Shin HAN ; YoonGyung LIM ; HyunMin LEE
Journal of Korean Physical Therapy 2019;31(2):67-75
PURPOSE: Patients with brain damage suffer from limitations in performing the activities of daily living (ADL) because of their motor function and visual perception impairment. The aim of this study was to help improve the motor function and visual perception ability of patients with brain damage by providing them with virtual reality-based contents. The usability results of the patients and specialists group were also evaluated. METHODS: The ADL contents consisted of living room, kitchen, veranda, and convenience store, similar to a real home environment, and these were organized by a rehabilitation specialist (e.g., neurologist, physiotherapist, and occupational therapist). The contents consisted of tasks, such as turning on the living room lights, organizing the drawers, organizing the kitchen, watering the plants on the veranda, and buying products at convenience stores. To evaluate the usability of the virtual reality-based visual cognitive rehabilitation service, general elderly subjects (n=11), stroke patients (n=7), stroke patients with visual impairment (n=4), and rehabilitation specialists (n=11) were selected. The questionnaires were distributed to the subjects who were using the service, and the subjective satisfaction of individual users was obtained as data. The data were analyzed using SPSS 21.0 software. The general characteristics of the users and the evaluation scores of the experts were analyzed using descriptive statistics. RESULTS: The usability test result of this study showed that the mean value of the questionnaire related to content understanding and difficulty was high, between 4–5 points. CONCLUSION: The virtual reality rehabilitation service of this study is an efficient service that can improve the function, interest, and motivation of stroke patients.
Activities of Daily Living
;
Aged
;
Brain
;
Cognitive Therapy
;
Humans
;
Motivation
;
Physical Therapists
;
Rehabilitation
;
Specialization
;
Stroke
;
Vision Disorders
;
Visual Perception
;
Water
7.Incidence and Risk Factors for Pregnancy-Related de Quervain’s Tenosynovitis in South Korea:A Population-Based Epidemiologic Study
Kee Jeong BAE ; Goo Hyun BAEK ; Yohan LEE ; Joonha LEE ; Yong Gil JO
Clinics in Orthopedic Surgery 2023;15(1):145-152
Background:
Although pregnant or lactating women have been recognized to be predisposed to de Quervain’s tenosynovitis (DQT), there is a lack of epidemiologic evidence. The purpose of this study was to estimate the nationwide incidence of pregnancy-related DQT (PRDQT) and to analyze risk factors using the Korean National Health Insurance (NHI) database.
Methods:
A retrospective epidemiologic study of pregnant women in South Korea from 2013 to 2017 was conducted using the NHI claims database. Using corresponding diagnostic codes, we identified women diagnosed with DQT during pregnancy or the postpartum period. We calculated the cumulative incidence and analyzed risk factors such as demographics, pregnancy type, delivery method, gestational complications, and comorbidities using multivariate logistic regression analysis.
Results:
Between 2013 and 2017, 34,342 patients with PRDQT were identified among 1,601,501 pregnant women, representing a cumulative incidence of approximately 2.1%. Age ≥ 30 years, multiple gestation, cesarean delivery, hypertensive disorders in pregnancy, and underlying rheumatoid arthritis were all identified as significant risk factors for the occurrence of PRDQT, whereas diabetic disorders in pregnancy and underlying diabetes mellitus were not.
Conclusions
In South Korea, PRDQT was found to affect approximately 2.1 out of 100 pregnant women between 2013 and 2017. The incidence and risk factors identified in this study can be used for clinical consultations and prediction, as well as for development of national health policies.
8.Laparoscopic Nissen Fundoplication in Children with Neurological Impairment versus Neurologically Normal Children.
Yohan JOO ; Ju Yeon LEE ; Jung Hyun CHOI ; Jung Man NAMGUNG ; Seong Chul KIM ; Dae Yeon KIM
Journal of the Korean Association of Pediatric Surgeons 2016;22(2):49-53
PURPOSE: This study aimed to assess the long-term clinical outcome of laparoscopic Nissen fundoplication (LNF) in children according to their neurologic status. METHODS: The study retrospectively analyzed the data of 82 children (62 neurologically impaired and 20 neurologically normal children with primary gastroesophageal reflux disease) who had undergone LNF between 2003 and 2012. The main outcome measures were the occurrence of recurrence that required reoperation and post-procedure complications such as infections, pneumonia, and gastrointestinal complications including ileus, dysphagia, and delayed gastric emptying. RESULTS: The median age at the time of the LNF was 25 months (range, 1-192 months), and the median of body weight was 10.0 kg (range, 2.8-37.0 kg). The average weight gain was 1.55±1.68 kg at 6 months, 3.32±2.30 kg at 1 year, and 5.63±4.22 kg at 2 years after surgery. Six (9.7%) of the 62 neurologically impaired patients and two (10.0%) of neurologically normal lost their body weight or had no weight changes. Eight (12.9%) of the 62 neurologically impaired children had required redo surgery because of gastroesophageal reflux disease recurrences, while 2 (10.0%) of the 20 neurologically normal children had experienced recurrences. In the neurologically impaired children, the postoperative complications included pneumonia (n=1), wound infection (n=1), urinary tract infection (n=1), dysphagia (n=1), delayed gastric emptying (n=1), and ileus (n=2). All of these complications were not found in the neurologically normal group, except for only one case of infectious colitis. However, there was no statistically significant difference between the two groups in postoperative complications. CONCLUSION: The outcomes of laparoscopic fundoplication were similar in the neurologically impaired children and in the neurologically normal children.
Body Weight
;
Child*
;
Colitis
;
Deglutition Disorders
;
Fundoplication*
;
Gastric Emptying
;
Gastroesophageal Reflux
;
Humans
;
Ileus
;
Laparoscopy
;
Neurologic Manifestations
;
Outcome Assessment (Health Care)
;
Pneumonia
;
Postoperative Complications
;
Recurrence
;
Reoperation
;
Retrospective Studies
;
Urinary Tract Infections
;
Weight Gain
;
Wound Infection
9.The Pedagogical Validity for a Six Years Curriculum in Pharmacy Education.
Eunbae YANG ; Tai Jin SHIN ; Sunghak KIM ; Yohan GO ; Seunghee LEE
Korean Journal of Medical Education 2005;17(3):225-238
PURPOSE: This study was to examine the pedagogical validity for a the six-years curriculum in pharmacy education in Korea. METHODS: The focus group, composed of 5 specialists, analyzed the pedagogical validity for a six-years curriculum from the perspective of administrative policies of higher education, educational sociology, curriculum composition, and educational economy. In addition, 3 consultants advised on the main issues related to the reformation of the school system in pharmacy education. RESULTS: It is not clear that the reformation of the school system in pharmacy education is aimed at undergraduate or graduate education in view of specialization of a higher education institute. The reformation of the school system is likely to cause educational inequality since a student who lacks financial support and cultural resources might give up entering pharmacy school. It also may ignite a struggle for power between pharmacists and physicians. The six- years curriculum is supposed to offer integrated experiences with a balance of theory and practice, representing characteristics such as consistency, clarity, reliability, and legitimacy. From the educational economy view, the validity of reformation of the school system can only be secured on the premise the expected income exceeds the total costs if the age-earning profile is constant in the current situation. CONCLUSION: Prior to discussions on the reformation of the school system in pharmacy education, the quality of pharmacy education should be improved first through multifarious efforts such as curriculum development, improvement to teaching and learning, introduction to an accreditation system, revision of the license examination, and graduate and continued pharmacy education and so on.
Accreditation
;
Consultants
;
Curriculum*
;
Education
;
Education, Graduate
;
Education, Pharmacy*
;
Financial Support
;
Focus Groups
;
Humans
;
Illegitimacy
;
Korea
;
Learning
;
Licensure
;
Pharmacists
;
Pharmacy*
;
Schools, Pharmacy
;
Socioeconomic Factors
;
Sociology
;
Specialization
10.Recurrent Transient Ischemic Attacks Caused by Postprandial Hypotension in a Patient with Occlusion of Right Internal Carotid Artery.
Jinkwon KIM ; Yohan JUNG ; Sang Won HAN ; Byung In LEE ; Kyung HEO
Journal of the Korean Neurological Association 2006;24(4):356-358
We report a 72-year-old man suffering from recurrent attacks of transient drowsy mentality during meal or on orthostatic body position. Markedly disturbed collateral blood flow to right hemisphere was observed on conventional cerebral angiography. Acute and old ischemic lesions in the right internal borderzone area were also noticed on magnetic resonance image. Postprandial and orthostatic hypotension in the present case could be the cause of the recurrent neurological deficit developed in the primarily disturbed collaterals in the right middle cerebral territory.
Aged
;
Carotid Artery, Internal*
;
Cerebral Angiography
;
Humans
;
Hypotension*
;
Hypotension, Orthostatic
;
Ischemic Attack, Transient*
;
Meals