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IR-UWB 레이다 기반의 무호흡 검출 및 호흡수 측정
고인창(Inchang Ko),박형철(Hyung Chul Park) 한국전자파학회 2017 한국전자파학회논문지 Vol.28 No.10
본 논문에서는 IR-UWB 레이다 신호를 이용하여 무호흡 검출과 호흡수를 측정할 수 있는 방법을 제안한다. 제안한 방법에서는 무호흡 검출과 호흡수 측정을 동시에 지원하기 위해서 레이다 신호의 크기, 도래시간 및 선택된 주파수 대역에서의 전력 정보를 이용한다. 하드웨어 실험을 통해서 제안한 방법을 사용하여 정확한 호흡수 측정이 가능함을 보인다. 또한, 제안한 방법을 사용하여 무호흡과 호흡의 선택비가 최소 50 dB 이상이 됨을 보인다. This paper presents a novel apnea detection and respiration rate estimation method using impulse-radio ultra-wideband (IRUWB) radar. The proposed method utilizes amplitude, time of arrival, and power in the selected band. The experimental results show that respiration rate can be estimated accurately using proposed method. And, it is shown that the selectivity between apnea and respiration can be improved more than 50 dB using the proposed method.
上顎骨折의 治驗例 : Le Fort Ⅲ Case Report
高仁昌,李世一,柳在德,李英浩 대한성형외과학회 1976 Archives of Plastic Surgery Vol.3 No.2
The mid-facial area lodges the organs of vision, the ocular glove and the organ of olfaction, the olfactory groove and nerve. The clinicl importance of facial middle third fracture is explained not only by the deformity and the danger of intracranial complication, but also by the functional disturbance of these structure which is the consequence of inadquate treatment. The maxilla, the largest bone in the middle face and centrally located, is frequently fractured in association with other bones of the mid-facial area. During recent years numerous articles have documented the steady increse in the incidence of maxilla fracture which have been observed within the framework of our mobile and violent society. This paper reviews our experience of severe maxillary fracture, Le Fort Ⅲ, among the many facial fractures who have been treated by the division of Plastic Surgery at Severance Hospital, Yonsei University.
혈관기원종양으로 오인된 귓바퀴의 색소 모기질종: 증례 보고
임석범,고인창,김훈,권건영,임수연 대한두경부종양학회 2023 대한두경부 종양학회지 Vol.39 No.2
Pilomatricoma is characterized by a semi-transparent epidermis, especially pigmented pilomatricoma, containing melanocytes in basaloid cells, which are dark and purple, resembling vessel-derived skin masses. If the vascularity at doppler ultrasound is high before surgery, it may be misdiagnosed. A 10-year-old female patient visited our clinic because of a mass in the right ear triangular fossa. Ultrasonography was performed, and a vascular-origin tumor was suspected because of the high vascularity. The excised mass was diagnosed as pigmented pilomatricoma by a pathologist. Pilomatricoma is mistaken for other masses owing to its various phenotypes. A misdiagnosis can lead to misdirected strategies which can cause delayed treatment and can result in an increase in the size of the pilomatricoma, making the sequalae of surgery more complicated. For proper treatment, careful examination and evaluation are required before surgery.
肥厚性瘢痕 및 Keloid 治療에 Madecassol의 臨床的 應用
李英浩,高仁昌,柳在德,李世一 대한성형외과학회 1976 Archives of Plastic Surgery Vol.3 No.2
Keloids and hypertrophic scars are benign tumor like over proliferation of dense fibrous tissue which developed in the dermis as an excessive accumulation of collagen fibres and Hyaline material during a healing process of the wound. The clinical features of hypertrophic scars and keloids varies with the process and time of their occurence. Successful treatment with resolution of the fibrous mass, a cosmetically attractive scar and no recurrence of the lesion is an extremely difficult goal to achieve but it is one of vital interest to the plastic surgeon. The goal is to control the over production of collagen in the early stages and enhance maturation of wound healing. The authors have recently used madecassol for the teatment of hyperophic scars and keloids. The patients were selected in random sample and treated with madecassol for one and two months and got the following results. 1) Symptomatic improvements of itching sensation and pressure pain were noted 43 cases (70.5%) in 61 cases. The group teated with madceassol for one month showed 60.7% and the other group treated for two months with madecassol showed 78.7% improvement. 2) The color change usually appeared two to three weeks after medication and the total cases vith improvement in color were 39 cases (64%) among 61 follow up cases. 3) In 23 cases (37.7%), hypertrophic scars and Keloid of one month treated group became thin in 25% and the other hand two months treated group 48.4%. 4) The softening of hard scar represented in 44 cases (72.1%) in total. The one month group became soft in 68% and the two month treated group 75.7%. 5) The additional surgery were performen in 58 cases during or after the medication. There are no recurrence of lesions but recurrence of symptoms(itching and prssure pain) showed in 7 cases. In addition to madecassol trestment, surgical intervention was carried out in 58 cases madecassol was usually given during or after.
아랫입술의 편평세포암 환자에서 아랫 입술 폭 손실을 최소화하고 입벌림 기능을 보존하기 위한 새로운 점막지붕 피판 재건술
김종협,고인창,임수연,김훈 대한두경부종양학회 2023 대한두경부 종양학회지 Vol.39 No.2
Lower lip reconstruction in cases with a full-thickness defect over one-third of the vermilion is challenging. Numerous conventional techniques have been applied with unsatisfactory surgical outcomes because of microstomia and oral commissure blunting due to shortened horizontal lip length. Herein, we present a case in which a full-thickness lower lip defect of more than one-third of the horizontal lip length was covered with a novel mucosal roofing flap reconstruction to minimize the loss of horizontal lip length and to preserve mouth opening. No recurrences or metastases were observed during 3 years and 6 months of follow-up, with horizontal lower lip length maintained and mouth opening of 2.5 finger breadths.
Concordant Surgical Treatment: Non-melanocytic Skin Cancer of the Head and Neck
류완철,고인창,이용해,차종현,김상일,김창균 대한두개안면성형외과학회 2017 Archives of Craniofacial Surgery Vol.18 No.1
Background: Skin cancer is the most common type of cancer. Of the 4 million skin lesions excised annually worldwide, approximately 2 million are considered cancerous. In this study, we aimed to describe a regional experience with skin cancers treated by a single senior surgeon and to provide a treatment algorithm. Methods: The medical records of 176 patients with head and neck non-melanocytic skin cancer (NMSC) who were treated by a single surgeon at our institution between January 2010 and May 2016 were retrospectively reviewed, and their data (age, sex, pathological type, tumor location/size, treatment modality) were analyzed. Patients with cutaneous squamous cell carcinoma (cSCC) who were classified as a high-risk group for nodal metastasis underwent sentinel node mapping according to the National Comprehensive Cancer Network guidelines. Results: Among the patients with NMSC who were treated during this period, basal cell carcinoma (BCC; n=102, 57.9%) was the most common pathological type, followed by cSCC (n=66, 37.5%). Most lesions were treated by complete excision, with tumor-free surgical margins determined via frozen section pathology. Thirty-one patients with high-metastasisrisk cSCC underwent sentinel node mapping, and 17 (54.8%) exhibited radiologically positive sentinel nodes. Although these nodes were pathologically negative for metastasis, 2 patients (6.5%) later developed lymph node metastases. Conclusion: In our experience, BCC treatment should comprise wide excision with tumorfree surgical margins and proper reconstruction. In contrast, patients with cSCC should undergo lymphoscintigraphy, as nodal metastases are a possibility. Proper diagnosis and treatment could reduce the undesirably high morbidity and mortality rates.
高明奎,柳在萬,高仁昌 大韓成形外科學會 1982 Archives of Plastic Surgery Vol.9 No.3
Since Cruvelhier reported one case of the dermoid cyst of nose, about 100 cases have been reported. Congenital dermoid cysts and fistulae of the nose usually present at birth but may go unrecognized until childhood or adult life. Their most common location is at the lower margin of the nasal bone, although they may be found at any point from the glabella to the base of the columella along the midline of the nose or septum. they are clinically significant for their potential for enlargement, erosion, and infection with subsequent recurrences and cosmetic deformities. Confusion with other lesions such as glioma, neurofibroma, encephalocele, pilonidal sinus, hemangioma, sebaceous cyst, lipoma and nasolacrimal obstruction is possible. It is the purpose of this paper to report the one lesion which have cyst on each side of the nose and common sinus tract along the midline treated surgically.