생체 이식형 무선에너지 전송 시스템 개발

유동수,이준하,서희돈,이상학,Yoo Dong-Soo,Lee Joon-Ha,Seo Hee-Don,Lee Sang-Hag 한국의학물리학회 2005 의학물리 Vol.16 No.3

생체에 이식되는 장치에 사용하기 위한 무선에너지 전송 시스템을 개발하였다. 이것은 체내에 이식된 장치에 경피적으로 전기에너지를 공급할 수 있는 것이다 경피적으로 결합된 트랜스포머의 권선간의 거리는 인간의 피부 두께를 고려하여 약 10$\~$20 mm이다. 본 연구에서는 Class-E 공진증폭기를 사용하여 높은 효율을 얻고자 하였다. 최대 전류는 각 주파수에서 50 mA 이상의 전류를 얻을 수 있었다. 개발된 시스템은 500 kHz, 1 MHz 및 4 MHz의 서로 다른 주파수에서 정확하게 동작하고 있다는 것을 보여주고 있다. As a part of implantable device in body, a transcutaneous energy transmission system has been developed. It would be desirable to tansfer electrical energy to implantable devices transcutaneously. The distance between transcutaneous transformer windings are approximately equal to the thickness of the human's skin, nominally between 10$\~$20 mm. Class-E resonant amplifier is used to drive a primary coil for high efficiency. Maximum current is above 50 mA at any frequency. The developed system shows that the circuit operates correctly at each frequency; 500 kHz, 1 MHz and 4 MHz.

초지연제를 이용한 매스콘크리트의 수화열 조정에 관한 연구

유동수(Yoo, Dong-Soo),심보길(Sim, Bo-Kil),윤치환(Yoon, Chi-Whan),한민철(Han, Min-Cheol),한천구(Han, Cheon-Goo) 한국콘크리트학회 2001 한국콘크리트학회 학술대회 논문집 Vol.2001 No.5

초지연제를 이용한 매스 콘크리트의 수화열 및 부착강도 특성

유동수 ( Yoo Dong-soo ),심보길 ( Sim Bo-kil ),윤치환 ( Yoon Chi-whan ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2001 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.5 No.1

Mass concrete is placed considering placing lifts in order to reduce the defects of qualities like the thermal cracks caused by hydration heat. But, construction joints occurred between placing lifts which cause the loss of strength, water tightness and unfavorable appearance. Therefore, in this paper, tests are carried out using concrete containing developed super retarding agent and plain concrete respectively in order to improve the qualities of mass concrete related to placing lift. Control of hydration heat and method to avoid placing lift are investigated. Adhesion strength between placing lift of the concrete containing super retarding agent is similar to that of the concrete without placing lift. Crack index of concrete by hydration heat is reduced to be a quarter compared to that of plain concrete without placing lift, and a half compared to that of plain concrete with placing lift.

측두하악관절의 초음파영상과 자기공명영상에서 하악과두 외측면과 관절낭간 거리 측정치 비교

이태완,유동수,한원정,김은경,Lee Tae-Wan,Yoo Dong-Soo,Han Won-Jeong,Kim Eun-Kyung 대한영상치의학회 2006 Imaging Science in Dentistry Vol.36 No.1

Purpose : To evaluate the reliability and clinical usefulness of ultrasonography in the temporomandibular joint (TMJ). Materials and Methods : Parasagittal and paracoronal 1.5 T MR images and 7.5 MHz ultrasonographs of 40 TMJs in 20 asymptomatic volunteers were obtained. Disc position using MR imaging was evaluated and the distance between the lateral surface of mandibular condyle and the articular capsule using MR image and ultrasonograph of 27 TMJs with normal disc position was measured and compared. Intraobserver and interobserver measurements reliability was evaluated by using interclass correlation coefficients (ICC) and measurement error. Also, the distance measured on ultrasonographs was compared, according to mouth position and disc postion. Results : The normal disc position was found in 27 of 40 asymptomatic joints. At the intraobserver reliability of measurement, ICC at the closed and open mouth position were 0.89 and 0.91. The measurement error was 0.4% and 0.5%. At the interobserver reliability, ICC at the closed and open mouth position were 0.92 and 0.81. The measurement error was 0.4% and 0.7%. At the TMJ with normal disc position, the distances between the lateral surface of mandibular condyle and the articular capsule measured on MR images and ultrasonographs were $2.0{\pm}0.7mm,\;1.8{\pm}0.5mm$, respectively (p<0.05). On the ultrasonographs, the distances at open mouth position were $1.2{\pm}0.5mm$ (p<0.05). At the TMJ with medially displaced disc, the distances at the closed and open mouth position were $1.3{\pm}0.3\;mm\;and\;0.9{\pm}0.2\;mm$ (p<0.05). Conclusion : The results suggest ultrasonography of TMJ is a reliable imaging technique for assessment of normal disc position.

Subtraction법을 이용한 악관절 X-선사진 판독에 관한 연구

라춘화,유동수,Na Choon-Wha,Yoo Dong-Soo 대한영상치의학회 1987 Imaging Science in Dentistry Vol.17 No.1

The purpose of this study is to know the value of the photographic subtraction technic in the transcranial oblique lateral projection of the TMJ. The author examined the transcranial oblique lateral projection radiographs which comprise 50 cases of 32 persons, compared the transcranial oblique lateral projection films and those subtraction films. The following results were obtained. 1) The condyle at closed jaw position had showed a reversed tone image, but the condyle at the opening position had showed a re-reversed ordinary image. Both condyles had showed one subtraction film because radiographic interpretation of TMJ was easy. 2) On 50 cases of subtraction films, 46 cases had showed same radiographic images compared with trascranial oblique lateral projection films. Four cases (3 cases of erosion, 1 cases of sclerosis) had showed additional changes of images so that capability of interpretation was improved.

하악골 부분절제술 시행한 부분 무치악 환자에서 보철 수복 증례

이동훈,유동수,이종혁,Lee, Dong-Hun,Yoo, Dong-Soo,Lee, Jong-Hyuk 대한치과보철학회 2015 대한치과보철학회지 Vol.53 No.1

하악골 연속성의 상실은 하악 기능의 균형과 대칭에 영향을 주며, 하악의 움직임에 변화를 유발하고 절제된 부위로 잔존하악골을 편위시킨다. 또한 연하, 발음, 하악의 운동, 저작, 호흡과 같은 다른 부분에서도 기능이상을 나타낸다. 하악골의 일부가 결손된 환자의 경우, 일반적으로 외과적 재건에 이어 보철적 수복이 이루어진다. 하지만 BRONJ (Bisphosphonate related osteonecrosis of the Jaw)와 같은 전신적 질환을 가진 환자의 경우, 외과적 재건의 적용에 제한이 있게 되고 전적으로 보철적 수복에 의지하게 된다. 다양한 보철적 방법이 하악의 변위를 최소화하고 저작 효율과 기능 및 심미를 개선하기 위하여 제시되었다. 가철성 국소의치로 치료 시, 입술, 뺨, 혀의 운동에 의해 측방 및 수평력이 발생하며 기능 인상을 통해 이를 최대한 줄여 주어야 한다. 또한, Twin occlusion을 사용하면 적절한 구순 및 협측의 지지를 얻으면서 교합관계의 형성을 가능하게 할 수 있다. 이 증례보고에서는 하악골 결손 증례에서 중립대 인상 방법과 twin occlusion을 통하여 기능적 심미적으로 만족할 만한 결과를 얻었기에 이를 보고하고자 한다. Loss of continuity of the mandible destroys the balance and symmetry of mandibular function, leading to altered mandibular movements and deviation of the residual fragment towards the resected side. Apart from deviation, other dysfunctions include difficulty in swallowing, speech, mandibular movements, mastication, and respiration are accompanied. In general, surgical reconstruction is considered first then proceeds to the prosthetic restorations. However, patients with systemic disease such as BRONJ (Bisphosphonate related osteonecrosis of the Jaw), surgical reconstruction may be limited. Thus, the prosthetic restoration remains as the only resort. Numerous prosthetic methods are employed to minimize deviation and to improve masticatory efficiency, function and esthetics. If a removable partial denture is the selected treatment modality, maximum stability of the partial denture base may be accomplished with a functional impression procedure by means of eliminating lateral and horizontal forces caused by the functional movements of the lips, cheeks and tongue. Also, Twin occlusion is used to obtain a favorable occlusal relationship and check support for esthetics. The purpose of this case report is to demonstrate how neutral zone impression technique and twin occlusion scheme were applied to restore a hemi-mandiblectomy patient with BRONJ syndrome to achieve satisfactory results in functional and esthetic aspects.

성도착증 혹은 성적 가해자의 인지행동치료

임명호,유동수,이재우,Lim, Myung Ho,Yoo, Dong Soo,Lee, Jae Woo 대한불안의학회 2014 대한불안의학회지 Vol.10 No.2

Non-pharmacological treatments have long been used for paraphilia or sexual offenders, but few clinical studies were conducted. However, recently there were issued cognitive behavioral therapy of paraphilia or sexual offenders based on the research findings obtained so far. In addition, there were the changes of Diagnostic and Statistical Manual of Mental Disorder by American Psychiatric Association at 2014. The methods of cognitive behavioral therapy for paraphilia or sexual offenders were electric aversion therapy, olfactory aversion therapy, ammonia aversion therapy, covert sensitization, masturbatory reconditioning, directed masturbation, verbal satiation, social skill training, assertiveness training etc. By synthesizing the newly reported foreign guidelines for treatment and review articles, the aim of this study is to investigate the non-pharmacologic therapies used for treatment of paraphilia or sexual offenders.

유육종성 수지.족지염

김주원(Joo Won Kim),유동수(Dong Soo Yoo),김일환(Il Hwan Kim),송해준(Hae Jun Song),심재정(Jae Jung Shim),강경호(Kyung Ho Kang),오칠환(Chill Hwan Oh) 대한피부과학회 1999 대한피부과학회지 Vol.37 No.10

N/A

모소의 동 2예

김상백 ( Sang Baik Kim ),유동수 ( Dong Soo Yoo ),송해준 ( Hae Jun Song ),김일환 ( Il Hwan Kim ) 대한피부과학회 2002 대한피부과학회지 Vol.40 No.11

Pilonidal sinus is a chronic inflammatory disease that is associated with hair; a midline hairy patch or pit in the sacral region with a sinus orifice in the bottom, or a cyst beneath it, in which hair is growing. Also, it is considered to belong in the category of follicular occlusion tetrad. It sometimes becomes inflamed, resulting in a subcutaneous abscess with recurrent infection. It becomes symptomatic during adolescence and presents as a foreign body abscess, with hair as the offender. Histological findings show follicular hyperkeratosis of the infundibulum with plugging and dilatation of follicle. Infiltration of hair occurs in one half of the specimens. Also, inflammatory cells are gathering to meet the challenge. The recommended treatment has been surgical excision of the lesion.

손발톱주위 및 손발바닥 사마귀에서 Acyclovir 병변내주사 요법의 효과 및 안전성

민경현 ( Kyung Hyun Min ),유은희 ( Eun Hee Yoo ),구하예린 ( Ha Yeh Rin Koo ),윤소연 ( So Yeon Yun ),최진영 ( Jin Young Choi ),유동수 ( Dong Soo Yu ),이영복 ( Young Bok Lee ) 대한피부과학회 2024 대한피부과학회지 Vol.62 No.3

Background: Warts are benign hyperkeratotic proliferative skin lesions caused by the human papillomavirus (HPV). Traditional destructive treatments, such as cryotherapy, have limited effectiveness and can lead to substantial adverse effects. Acyclovir, an antiviral agent against human herpes viruses, may be effective in the treatment of warts, as HPV is also a DNA virus. Objective: This study aimed to evaluate the efficacy of intralesional acyclovir for the treatment of warts. Methods: We conducted a retrospective study of 21 patients diagnosed with periungual or palmoplantar warts who were treated with intralesional acyclovir (25 mg/mL) injections between January 2022 and December 2022. The treatment was repeated at 3- to 4-week intervals, and the therapeutic effect was evaluated one month after the final treatment session. Results: Complete resolution of warts was observed in nine patients (42.9%), partial response in seven patients (33.3%), and no response in five patients (23.8%). Injection-related transient pain and hemorrhage were reported by all patients, with a hemorrhagic crust observed in one patient (4.76%) and transient onycholysis noted in another patient (4.76%). No permanent nail deformities have been reported. Conclusion: Intralesional acyclovir is a potentially effective and safe treatment modality for periungual and palmoplantar warts. (Korean J Dermatol 2024;62(3):129∼135)