Publications by authors named "Seungkyu Han"

Article Synopsis
  • This study evaluated the use of artificial dermal grafts for lower eyelids after removing basal cell carcinoma (BCC) to assess scar contracture.
  • Postoperative evaluations included four quantitative and two qualitative parameters, revealing no significant differences in measurements.
  • The results suggest that artificial dermal grafts can be effectively used without causing complications like eyelid retraction or ectropion.
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Background: This study aimed to compare the degree of scar contracture following artificial dermis grafting after excision of basal cell carcinoma on the nose categorized by defect location into three nasal subunits.

Methods: Anthropometric analysis was conducted on seven parameters using patients' photographs to compare changes between preoperative and postoperative measurements based on nasal subunits. Defect locations were classified as: (1) dorsum and sidewalls (D zone), (2) tip (T zone), and (3) alar lobule (A zone).

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This paper proposes a novel drone detection method based on a convolutional neural network (CNN) utilizing range-Doppler map images from a frequency-modulated continuous-wave (FMCW) radar. The existing drone detection and identification techniques, which rely on the micro-Doppler signature (MDS), face challenges when a drone is small or located far away, leading to performance degradation due to signal attenuation and faint (MDS). In order to address these issues, this paper suggests a method where multiple time-series range-Doppler images from an FMCW radar are overlaid onto a single image and fed to a CNN.

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Article Synopsis
  • * A retrospective study analyzed the effects of SLEG on patients undergoing septorhinoplasty, revealing significant improvements in nasal function as measured by the NOSE score and nasal geometry.
  • * Results indicated that SLEG, particularly when combined with turbinoplasty, led to notable enhancements in airway function, making it effective for East Asian patients with nasal deviations.
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Background: Recently, micronized adipose tissue (MAT) grafts have shown promising results in wound healing, including diabetic ulcers.

Objective: To assess the possibility of using 3D printed MAT niche grafts in the management of skin and soft tissue defects resulting from non-melanoma skin cancer (NMSC) resections.

Materials And Methods: A retrospective feasibility study was conducted on patients with skin and soft tissue defects resulting from NMSC resections.

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Reconstruction of vermillion defects of the lower lip requires careful consideration of functional and aesthetic aspects. Traditionally, various local flap methods involving tissue advancement from the corner of the mouth, lateral chin, and medial cheek have been commonly employed to fill lower lip defects. However, these approaches have inherent limitations, which include technical complexity, disruption of the orbicularis oris muscle, lip tightening, microstomia, and visible scarring.

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This paper introduces an approach to the automated measurement and analysis of dairy cows using 3D point cloud technology. The integration of advanced sensing techniques enables the collection of non-intrusive, precise data, facilitating comprehensive monitoring of key parameters related to the health, well-being, and productivity of dairy cows. The proposed system employs 3D imaging sensors to capture detailed information about various parts of dairy cows, generating accurate, high-resolution point clouds.

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The rapid evolution of 3D technology in recent years has brought about significant change in the field of agriculture, including precision livestock management. From 3D geometry information, the weight and characteristics of body parts of Korean cattle can be analyzed to improve cow growth. In this paper, a system of cameras is built to synchronously capture 3D data and then reconstruct a 3D mesh representation.

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Article Synopsis
  • The study aims to create a risk scoring system to gauge the likelihood of amputation in patients with diabetic foot ulcers by evaluating the levels of vasculopathy and infection severity.
  • Researchers graded the severity of vasculopathy (blood flow issues) and infection using specific scores, and combined these to give a total risk score ranging from 0 to 4.
  • Results indicated that higher risk scores correlated with a significantly increased likelihood of both major and minor amputations, suggesting the scoring system is a useful predictive tool for clinical outcomes.
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Transconjunctival orbital fat repositioning is a surgical technique that resolves protruding orbital fat and sunken tear troughs through a single procedure. The procedure involves incision of the conjunctiva and dissection of the tear trough and orbicularis retaining ligaments, followed by repositioning of the sufficiently released orbital fat as a pedicle. Various techniques have been used to fixate the repositioned fat, including direct suturing of the fat to the target area (internal fixation) and suturing the repositioned fat pedicle and pulling out the suture toward the lower eyelid skin (external fixation).

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  • DFUs (diabetic foot ulcers) are chronic wounds prone to infections, and a new fluorescence imaging device was developed to identify bacterial presence based on the type of fluorescence emitted when illuminated by violet light.
  • The study assessed the diagnostic accuracy of this device by comparing its results with tissue culture outcomes from 35 patients and 48 wounds, categorizing the bacterial presence accordingly.
  • Results showed that the device had varying accuracy levels for detecting different types of bacteria, with an overall accuracy of 62.5%, indicating its potential utility in detecting bacterial bioburden but also suggesting lower accuracy than previously reported in other studies.
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  • The study focuses on creating a specialized wound-dressing team at Korea University Guro Hospital to assist patients who don't need complex wound care, highlighting the lack of existing information on such teams.
  • Over four years, the team managed a total of 180,872 cases, with catheter-related wounds being the most common, and conducted satisfaction surveys that showed high scores from patients and healthcare providers.
  • Results indicate that the wound-dressing team improves overall satisfaction with low complication rates, suggesting a successful model for similar services in other healthcare settings.
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Extensive inferomedial blow-out fractures involving the inferomedial orbit strut frequently result in severe ophthalmic complications. Therefore, anatomical reconstruction is essential but is still technically challenging. Thus, the authors have used a novel technique using a combination of single fan-shaped titanium-reinforced porous polyethylene (TR-PPE) implants and a bidirectionally extended transconjunctival approach.

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Background: Free tissue transfer to the knee region in patients with chronic post-traumatic knee osteomyelitis (CTKOM) poses a great challenge to surgeons because the remaining soft tissues adjacent to defects, including vascular structures, are usually damaged by chronic inflammation and multiple debridements. Thus, we developed an algorithm to help select the optimal recipient vessels and appropriate anterolateral thigh perforator (ALTP) flap type. In addition, we performed surgery using this algorithm and achieved successful reconstructions.

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Three-dimensional point cloud generation systems from scanning data of a moving camera provide extra information about an object in addition to color. They give access to various prospective study fields for researchers. With applications in animal husbandry, we can analyze the characteristics of the body parts of a dairy cow to improve its fertility and milk production efficiency.

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The development of the maritime industry has led to a corresponding increase in maritime accidents. Maritime accidents are major events that are costly to recover and can cause casualties. Moreover, individuals who are brought to the scene for recovery or rescue are at risk.

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Background: Extensive traumatic soft tissue defects in the lower extremities typically require complete coverage of exposed bone because inadequate coverage, such as partial flap loss, may result in bony infection and ultimately lead to limb salvage failure. To achieve complete coverage of these defects, we used the wide anterolateral thigh perforator flap in which the turbocharging procedure augments the blood flow. Herein, we describe our turbocharging technique and discuss its effectiveness.

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Aims: Transcutaneous oxygen pressure (TcPO) is a reliable predictor of wound healing in diabetes patients; however, measurements are cumbersome. Previously, we demonstrated that skin hydration in the feet of patients with diabetic foot ulcers (DFU) is influenced by microcirculation rather than peripheral nerve function. Furthermore, skin hydration level before recanalization can predict wound healing better than TcPO.

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Background: The free anterolateral thigh perforator (ALTP) flap has been successfully adopted to reconstruct traumatic soft tissue defects in the lower extremities. However, the occurrence of deep vein thrombosis (DVT) in donor or recipient veins has been overlooked, and there has been no reliable guideline to manage it. Therefore, in this study, we review our cases where the ALTP flaps were transferred to traumatic lower limbs even though DVT was found in the pedicle or recipient veins.

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Numerous studies have demonstrated the various properties of micronized adipose tissue (MAT), including angiogenic, anti-inflammatory, and regenerative activities, which can be helpful in wound healing. This exploratory clinical trial aimed to report the efficacy and safety of MAT niche for treating diabetic foot ulcers. Twenty subjects were randomly divided into MAT niche treatment ( = 10) and control groups ( = 10).

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Patients and surgeons are often disappointed with the scar length after conventional staged excision of large disfiguring skin lesions. We have developed an alternative approach to facilitate scar length reduction. We aimed to report the efficacy of our staged excision method, which includes a hexagonal-pattern excision, wide undermining, and purse-string suture.

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Background: Autologous material remains the preferred graft material for use in rhinoplasty. However, resorption rates of autografts remain controversial. In addition, long-term follow-up studies on autografts are rare.

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Purpose: The purpose of this study was to investigate the risk factors for major amputation in persons hospitalized with diabetic foot ulcers involving the midfoot.

Design: Retrospective study.

Subjects And Setting: Between January 2003 and May 2019, a total of 1931 patients with diabetes were admitted to the diabetic wound center for the management of foot ulcers.

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Background: Septal extension grafting (SEG) is used for nasal tip projection and positioning. Often, insufficient quadrangular cartilage is available for grafting in Asians, and in most secondary cases the septum is already harvested. We utilized the folded cymba concha as an alternative for caudal SEG (CSEG) by modifying a tongue-in-groove technique.

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