• Journal of Medicine and Life Science
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• 제19권3호
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• pp.109-115
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• 2022

During emergencies, the time from symptom onset to definitive treatment determines the final outcome. Therefore, the emergency medical service (EMS) system in Korea, aims to transfer patients requiring emergency care to appropriate medical facilities within 30 minutes. This is in an attempt to improve the chances of survival and reduce sequelae. We attempted to locate areas vulnerable to prehospital transportation and identify hot spots with high demand for emergency medical helicopters in Jeju, by using a grid-based geospatial analysis. This retrospective cross-sectional observational study employed EMS data of 119 ambulance run sheets spanning from January 1, 2010 to September 30, 2018 in Jeju. The location data of emergency patients was superimposed on the spatial analysis frame using the geographic information system (GIS). Subsequently, the locations of long-distance transfer and delayed transfers to the hospital were analyzed, to identify hot spots where the demand for helicopter emergency services would be high. Of the total analysis targets, 42.2% (20,288 people) took more than 30 minutes from reporting to 119 dispatchers to hospital transfer. As the transfer time interval increased, the patient occurrence time increased in the city of Jeju, increased in Seogwipo, and the ratio of patients/guardians to select a transfer hospital rose with significant differences. This study identified the characteristics related to time delays in prehospital transfer of emergency patients in Jeju, and the areas vulnerable to prehospital emergency care were derived and visualized through spatial analysis using the GIS.

• Journal of Medicine and Life Science
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• 제20권2호
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• pp.83-88
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• 2023

Metal artifacts cause inaccuracies in target delineation, radiation treatment planning, and delivery when computed tomography images of a radiotherapy patient implanted with a high-density material in the body are acquired. In this study, we investigated the possibility of obtaining improved images in clinical trials through metal artifact reduction using silicon impression materials without the need for a specific metal artifact reduction algorithm. A silicon impression material exhibiting a constant Hounsfield unit (HU) value according to the mixing ratio of the catalysts and bases was selected. The material did not exhibit any change in weight or shape over time. For both the instances of inserting the metal material and applying the silicon impression material, the HU value and dose were compared with homogeneous cases filled with water-equivalent materials. When the silicon impression material was applied to the region where the high-density material was located, the HU value was within 5% and the dose was within 3% compared with those of the homogeneous cases. In this study, the silicon impression materials reduced metal artifacts. However, because the composition, shape, size, and location of high-density materials differ, further studies are required to consider these factors in clinical applications.

• 대한족부족관절학회지
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• 제27권2호
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• pp.55-57
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• 2023

Purpose: Tibialis anterior tendon rupture is uncommon and usually caused by laceration. Rupture with an open window is often considered simple laceration, and thus diagnosis is often overlooked or delayed. The purpose of this study was to analyze the clinical features of tibialis anterior tendon rupture. Materials and Methods: Twenty-two patients treated for tibialis anterior tendon rupture from March 2015 to December 2019 were examined. Age, sex, rupture etiology, rupture location, and diagnostic and treatment delays were investigated. Results: Mean patient age was 45.7 years, and there were 14 males and 8 females. In 18 cases, rupture was caused by laceration and in 4 by spontaneous rupture. Of the 18 cases caused by laceration, 8 were lawnmower related, 8 were glass injuries, and 2 were caused by crush or degloving injuries, respectively. Three of the 4 spontaneous rupture cases and 4 of the 18 caused by laceration were overlooked. Conclusion: Tibialis anterior tendon rupture is rare and is easily overlooked. Close physical examination is essential to arrive at a correct initial diagnosis in patients with acute or chronic rupture, and greater care is needed in cases of glass injury.

• Korean Journal of Acupuncture
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• 제40권2호
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• pp.33-43
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• 2023

Objectives : Floating acupuncture (FA) is a kind of newly developed acupuncture technique that contains its own apparatus. The technique has unique points that the body of the acupuncture needle stays intradermal space and manipulation is performed by shaking the needle horizontally; after manipulation, part of the needle remained in the intradermal space for 2~3 days. FA is not a common acupuncture methodology while various clinical study claims its efficacy on musculoskeletal disorders. In this study, the authors aimed to enhance the use of FA by comparing related theories. Methods : The authors reviewed classics, books, and articles related to FA, Meridian Muscle (MM), Myofascial Pain Syndrome (MPS), and Wrist-Ankle Acupuncture (WAA), and compared its characteristics by related theory, related symptoms, apparatus, and performing procedures. Results : FA was related and had various common parts with MM, MPS, and WAA, however, there were unique parts in the manipulation, apparatus, and stimulation location. FA is based on MM and MPS which pointing 'ashi points' or 'trigger points' as a treating target while FA does not stimulate the points directly. FA also targets subcutaneous space by inserting the needle horizontally as WAA does, while FA remains the needle handle part in the subcutaneous area for 2~3 days for more stimulation. Conclusions : FA has a unique manipulation procedure and potential benefit for musculoskeletal disorders despite the crude theological base written by Fu himself. Thus, developing a new explanation and patient-friendly methodology/apparatus is required for further down-to-earth studies.

• 대한중풍순환신경학회지
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• 제7권1호
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• pp.59-64
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• 2006

Objective : This study was aimed to investigated the warning signs and its relationship with the other characteristics in acute stroke patients. Methods : Three-hundred sixty three acute stroke patients were recuited in the oriental medical hospitals of 3 universities located in metropolitan region from October in 2005 to October in 2006. We evaluated their stroke type with brain MRI, their waring signs, and general characteristics such as age, sex, past history, risk factor, etc. Result : Of the 363 patient, 138(38%) patients were experience of warning signs. The frequency of Stress were found more in experience of warning signs than none of them. Warning signs were more common in Large Artery Atherosclerosis than in the other etiology. Conclusion : Although a concrete conclusion can hardly be drawn from this study, it reminds physicians of the importance of warning signs which their patients appeal. For the further investigation, it seems to be necessary to construct fundamental databases for stroke by increasing the number of patients and by examination into the etiology and location.

• The Journal of Advanced Prosthodontics
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• 제15권3호
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• pp.126-135
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• 2023

PURPOSE. The aim of this study was to evaluate the reliability of implant stability measuring devices depending on the location of the implant and the position of the patient. MATERIALS AND METHODS. Six implants were installed in different dentate sextants of six artificial bone models. Implant stability was measured in three conditions of the bone model (without mounting on a phantom head, mounted on a phantom head in supine position, and mounted on a phantom head in upright position). A resonance frequency analysis device (Osstell) and two damping capacity analysis devices (Periotest and Anycheck) were used to measure implant stability. The values measured outside the phantom head were treated as controls, and the values inside the phantom head were compared using an independent t-test. RESULTS. Osstell showed different results in two of the six divisions in both the supine and upright positions compared to outside of the mouth (P < .05). Periotest showed different results in all six parts in the supine position and in five parts in the upright position compared to outside of the mouth (P < .05). While Anycheck showed different results in five areas in the supine position compared to outside of the mouth, it showed different results in only one area in the upright position (P < .05). CONCLUSION. In the difficult implant position for the operator to access, the implant stability measuring devices show less reliability. The accessibility of implant is greatly affected in the order of Osstell, Anycheck, and Periotest.

• Journal of Yeungnam Medical Science
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• 제40권2호
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• pp.202-206
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• 2023

Cesarean scar pregnancy (CSP) is a rare complication that occurs in less than 1% of ectopic pregnancies, and uterine didelphys is one of the rarest uterine forms. We report a successful laparoscopic excision and repair of CSP in a woman with uterine didelphys and a double vagina. A 34-year-old gravida one, para one woman with a history of low transverse cesarean section presented to our hospital with a suspected CSP. She was confirmed to have uterine didelphys with a double vagina during an infertility examination 7 years earlier. Magnetic resonance imaging showed a 2.5-cm gestational sac-like cystic lesion in the lower segment of the right uterus at the cesarean scar. We decided to perform a laparoscopic approach after informing the patient of the surgical procedure. The lower segment of the previous cesarean site was excised with monopolar diathermy to minimize bleeding. We identified the gestational sac in the lower segment of the right uterus, which was evacuated using spoon forceps. The myometrium and serosa of the uterus were sutured layer-by-layer using synthetic absorbable sutures. No remnant gestational tissue was visible on follow-up ultrasonography one month after the surgery. This laparoscopic approach to CSP in a woman with uterine didelphys is an effective and safe method of treatment. In women with uterine anomalies, it is important to confirm the exact location of the gestational sac by preoperative imaging for successful surgery.

• 한국컴퓨터정보학회논문지
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• 제28권10호
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• pp.257-266
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• 2023

본 연구의 목적은 언론빅데이터를 활용하여 1990년 이후 최근까지 치매환자의 배회와 실종에 관련된 기술특성과 변화를 이해하는데 있다. 언론빅데이터인 빅카인즈를 활용하여 두 단계로 분석하였다. 1단계는 기술변화의 일반적 특성을 분석하였고 2단계는 1단계에서 추출된 가중치가 높은 연관키워드의 상세분석을 하였다. 연구결과, 첫째, 언론보도는 2000년 초반부터 보도되기 시작하였고 2014년 이후에야 점차 보도가 증가되는 추세를 나타냈다. 둘째, 기술 및 기기활용의 변화특성으로 GPS를 중심으로 AI, IoT등의 기술과 융합되는 특성을 보였다. '드론'은 고도의 기술로 최근에 보도가 증가하였지만 실제 적용을 위한 윤리적 문제해결이 요구되었다. 마지막으로, 경찰과 보호자를 중심으로 위치확인 기술에 집중된 특성이 나타났다. 본 연구결과를 토대로 지역사회에서 치매환자의 배회와 실종을 예방하고 안전보행을 지원할 수 있는 기술개발 및 지역사회 협력에 대해 논의하였다.

• Advances in nano research
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• 제15권5호
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• pp.451-466
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• 2023

Gastrointestinal cancer (GC) is a prevalent malignant tumor of the digestive system that poses a severe health risk to humans. Due to the specific organ structure of the gastrointestinal system, both endoscopic and MRI diagnoses of GIC have limited sensitivity. The primary factors influencing curative efficacy in GIC patients are drug inefficacy and high recurrence rates in surgical and pharmacological therapy. Due to its unique optical features, good biocompatibility, surface effects, and small size effects, nanotechnology is a developing and advanced area of study for the detection and treatment of cancer. Because of its deep location and complex surgery, diagnosing and treating gastrointestinal cancer is very difficult. The early diagnosis and urgent treatment of gastrointestinal illness are enabled by nanotechnology. As diagnostic and therapeutic tools, nanoparticles directly target tumor cells, allowing their detection and removal. XGBoost was used as a classification method known for achieving numerous winning solutions in data analysis competitions, to capture nonlinear relations among many input variables and outcomes using the boosting approach to machine learning. The research sample included 300 GC patients, comprising 190 males (72.2% of the sample) and 110 women (27.8%). Using convolutional neural networks (CNN) and artificial neural networks (ANN)-EXtreme Gradient Boosting (XGBoost), the patients mean± SD age was 50.42 ± 13.06. High-risk behaviors (P = 0.070), age at diagnosis (P = 0.037), distant metastasis (P = 0.004), and tumor stage (P = 0.015) were shown to have a statistically significant link with GC patient survival. AUC was 0.92, sensitivity was 81.5%, specificity was 90.5%, and accuracy was 84.7 when analyzing stomach picture.

• 한국방사선학회논문지
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• 제17권6호
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• pp.897-902
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• 2023

본 논문에서는 휴대용 X-ray 검출기의 방사선 고감도 검출에 대한 실현 가능 여부를 확인하기 위한 SiPM의 특성 분석을 목적으로 한다. 휴대용 X-ray 검출기는 환자의 위치에 빠르게 접근하여 실시간 이미지를 획득함으로써 의사들은 신속하게 진단을 수행할 수 있는 장점이 있지만 이러한 이동성은 선량 감지의 어려움을 동반한다. 기존 검출기에서는 SiPM을 X-ray Trigger를 판별하는 단순한 용도로 사용하고 있다. SiPM을 통한 X-ray의 고감도 검출 가능 여부를 확인하기 위해 7종의 SiPM Sensor를 비교 선정하고 특성 분석을 진행하였다. 최종 시험에 사용한 SiPM은 10 nGy 수준의 극저선량 조사 조건에서 Signal 구분이 가능하며, 관전압에 따라 Signal 상승곡선의 기울기가 변하는 것이 확인되었다. X-ray 선량에 따라 SiPM의 signal level 및 지속시간이 변화되는 특성을 이용한 고감도 측정이 가능할 것으로 보인다.