• Journal of Korean Neurosurgical Society
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• 제58권6호
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• pp.571-577
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• 2015

Direct removal of beak-type ossification of posterior longitudinal ligament at thoracic spine (T-OPLL) is a challenging surgical technique due to the potential risk of neural injury. Slipping off the cutting surface of a high-speed drill may result in entrapment in neural structures, leading to serious complications. Removal of T-OPLL with an ultrasonic osteotome, utilizing back and forth micro-motion of a blade rather than rotatory-motion of drill, may reduce such complications. We have applied the ultrasonic osteotome for posterior circumferential decompression of T-OPLL for three consecutive patients with beak-type OPLL and have described the surgical techniques and patient outcomes. The preoperative chief complaint was gait disturbance in all patients. Japanese orthopedic association scores (JOA) was used for functional assessment. Scores measured 2/11, 5/11, 2/11, and 4/11 for each patient. The ventral T-OPLL mass was exposed after posterior midline approach, laminotomy and transeversectomy. The T-OPLL mass was directly removed with an ultrasonic osteotome and instrumented segmental fixation was performed. The surgeries were uneventful. Detailed surgical techniques were presented. Gait disturbance was improved in all patients. Dural tear occurred in one patient without squeal. Postoperative JOA was 6/11, 10/11, 8/11, and 8/11 (recovery rate; 44%, 83%, 67%, and 43%) respectively at 18, 18, 10, and 1 months postoperative. T-OPLL was completely removed in all patients as confirmed with computed tomography scan. We hope that surgical difficulties in direct removal of T-OPLL might be reduced by utilizing ultrasonic osteotome.

• 전자공학회논문지S
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• 제35S권6호
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• pp.66-71
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• 1998

본 연구에서 피부계통의 진단에 이용될 수 있는 고해상도 영상진단기를 개발하였으며 개발된 영상진단기는 sector scanning 방식으로서 A-mode, B-mode, M-mode의 80${\mu}m$ 축방향, 250${\mu}m$ 축방향 해상도로 $5mm {\times} 5mm$의 인체 단면 영상을 초당 20frame으로 나타낸다. 이 영상장치는 대부분의 피부학(dermatology) 계통의 질환에 그 병리학적인 연구에 이용될 수 있을 뿐만 아니라 안과(ophthalmology)나 치과(odontology) 계통의 병리학적인 판단에도 도움을 줄 수 있다고 생각되며 또한 피부미용(dermato-cosmetology)을 위한 분야에도 응용 가능하다.

• 대한두경부종양학회지
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• 제12권2호
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• pp.177-180
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• 1996

Warthin's tumor is a benign and slow growing tumor found exclusively in the parotid gland or the periparotid lymph nodes. It mostly affects males between the age of forty to seventy years and is closely related with smoking history. Between January 1981 and June 1996, 42 patients underwent surgical excision of Warthin's tumor of the parotid gland; which made up 10.6% of all parotid gland surgeries(398 cases) during the same period. Their ages ranged from 36 to 75 years with a mean age of 56 years. There were 33 male and 9 female patients with a 4.3 : 1 male to female ratio. The majority of the tumors were situated in the parotid tail whereas one was in the deep lobe. Bilateral simultaneous involvements of the parotid gland were found in 4 patients(9.5%) ; therefore total of 46 parotid glands were involved. Four(8.7%) of the 46 parotid glands had multifocal tumors ranginging from two to three lumps. Tumor sizes varied from 1.5 to 6.0cm with mean diameter of 3.lcm. Of the 42 patients, 26(61.9%) were diagnosed preoperatively or peroperatively by means of CT scans, ultrasound, 99m-Tc. scan, fine needle aspiration cytology or intraoperative frozen section biopsy. Of the 46 tumors, 30 underwent a superficial(n=29) or total(n=1) parotidectomy and for 16 cases with tumors suspected preoperatively or peroperatively of being single Warthin's tumor, only enucleation was performed. No cases of recurrence were identified during the follow up period regardless of type of operation performed, however the postoperative complication rate was much higher in the parotidectomy group(33.3%) than in the enucleation only group(12.5%). We feel that an enucleation procedure may be appropriate for the patients with single Warthin's tumor.

• 비파괴검사학회지
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• 제28권1호
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• pp.46-53
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• 2008

복합재료의 내부 결함 평가를 위해 일반적으로 적용되어온 초음파 C-스캔 기법은 섬유자동 배열을 통한 정밀 성형 공정에 적용하기에는 많은 어려움이 있다. 따라서 본 연구는 복합재료의 정밀 성형 공정 중에 발생되는 각종 내부 결함들을 비파괴적, 비접촉으로 평가하기 위한 새로운 하이브리드 초음파 평가 기법을 확립하는데 목적이 있다. 이를 위하여 본 연구에서는 초음파 산란 반사(scattering reflection) 방식을 토대로 한 새로운 이중 피치-캐치(dual pitch-catch) 기법을 확립하여 기존의 결함평가를 위해 시험편의 스캔에 소요되는 시간을 줄이면서 우수한 결함 영상을 얻을 수 있는 새로운 하이브리드 기법을 개발하였다. 즉 두 가지 종류의 열경화성 및 열가소성 복합재료(carbon/epoxy, carbon/PPS) 적층판의 내부 박리(delamination) 결함의 영상화를 위하여 레이저를 이용한 유도 초음파의 발생 및 이중 피치-캐치(pitch-catch)방식을 토대로 한 비접촉식 공기 정합 트랜스듀서(air-coupled transducer)를 이용하여 결함 영상을 얻기 위한 핵심 알고리즘을 확립하였다.

• 대한의용생체공학회:의공학회지
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• 제41권5호
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• pp.173-178
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• 2020

Remote control intervention surgery robotic system improves treatment effect on cardiovascular patients and reduces X-ray exposure. However, at the time of the first procedure, CT (computerized tomography) and other ultrasound diagnostic equipment should be used because the operator must insert the cannula directly into the patient's leg. Improvements to this have been un-met-needs of hospitals. In this paper, we developed a system that can insert the cannula intuitively and quickly by displaying blood vessels at a glance through the system using smart wearable glasses. The core development method is as follows. In order to project augmented reality onto the surgical image, CT scan angiography image is extracted and processed. In the process, three CT-Markers are used to create a coordinate system of blood vessel images. Additionally, a reference marker is photographed on a single camera to obtain a camera coordinate system. Since the CT marker and the reference marker are in the same position, 3D registration is performed. In the text, a detailed explanation will be given.

• 여성건강간호학회지
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• 제11권3호
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• pp.218-224
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• 2005

Purpose: The Purpose of this study was to investigate the relationship between state anxiety and maternal fetal attachment of unmarried mothers in a welfare center. Methods: The subjects were 25 unmarried mothers in a welfare center. The data was collected through personal interviews using a questionnaire. The instruments used for this study were the modified Spielberger's state anxiety inventory and Cranley's Maternal-Fetal Attachment Scale. Data was analyzed descriptive statistics, mean, standard deviation, t-test and the pearson correlation coefficient with the SPSS computer program. Results: The age of the subjects ranged from 15 to 25, and their average age was 20.0. The mean score of state anxiety was 58.2. There was significant difference in the degree of maternal state anxiety between the group whose pregnancy was known by their family and the group whose pregnancy was hidden. The group whose pregnancy was known showed a low state anxiety score. There was a significant difference in the degree of maternal state anxiety by the gestational period. The group who were in the second and third gestational trimester showed lower state anxiety score than in the first trimester. The mean score of maternal-fetal attachment(MFA) was 64.9. There were significant differences in the degree of maternal fetal attachment, by an ultrasound scan experience. The most frequently practiced attachment item was "I think the fetus is able to feel(mean 3.8)". Unmarried mothers degree of state anxiety showed a negative correlation with the degree of maternal fetal attachment(r=-.25), but there was no significant difference between the two variables. Conclusions: The unmarried mothers made an effort in striving to reduce their high state anxiety and to enhance maternal fetal attachment. They also realize how to take care of their state anxiety.

• 대한한방부인과학회지
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• 제33권1호
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• pp.116-127
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• 2020

Objectives: The purpose of this study is to analyze csatisfaction with clinica1 training in the department of Korean Medicine Obstetrics and Gynecology and the related factors. Methods: All the students on the graduating class of school of Korean Medicine, Dong-Shin University must be trained for 1 year in the department of Korean Medicine Obstetrics and Gynecology according to clinical training guideline including Objective Structured Clinical Examination (OSCE). After completing clinical training, we distributed questionaries to them about a reflex of the object of study, usefulness, difficulty, satisfaction and preference. And then, we analyzed the related factors including descriptive statistics, frequency analysis and correlation analysis by SPSS 12.0. Results: In general, a reflex of the aim of study (7.31±1.59), satisfaction with contents (7.44±1.58), and difficulty (6.13±1.34) were evaluated restectively. There is no statistically significant difference with sex. There is a statistically significant positive correlation between a reflex of the aim of study and satisfaction with contents. The primary preferences of clinical practice were Clinic Training, Ward Training, PBL (Problem Based Learning), OSCE. In OSCE, a reflex of the aim of study (7.04±1.83) and usefulness (7.02±1.97) were highly evaluated. There is no statistically significant difference with sex. The primary preferences for clinical OSCE practice were breast examination, genital examination, ultrasound scan, and pap smear. Facilities and equipment (6.84±2.01), contents of clinical training (7.29±1.83), the handout (7.20±1.98) and time scheduling (7.29±1.90) were evaluated respectively in general composition of clinical training. Conclusions: Clinical training program in the department of Korean Medicine Obstetrics and Gynecology can be highly estimated from the viewpoint of satisfaction with clinical training and the related factors.

• 대한한방내과학회지
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• 제42권5호
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• pp.916-922
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• 2021

Objectives: This study aimed to determine whether Korean medicine could improve unilateral testicular pain caused by recurrent varicocele without unfavorable side effects. Methods: A 46-year-old man diagnosed with varicocele, identified with a scrotal ultrasound scan, had right-side testicular pain. We administered Banchong-san and Eunhoebanchong-san to observe changes in the degree of pain. Results: After one month of taking Banchong-san and Eunhoebanchong-san, testicular pain improved. Conclusion: This study suggests that Korean medicine might be effective for managing testicular pain caused by varicocele.

• 대한한의학회지
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• 제42권1호
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• pp.75-98
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• 2021

Objectives: The purpose of this study is to investigate the characteristics, validity, and reliability of non-radiological assessment tools of scoliosis that have been studied so far. Methods: Electronic databases including Pubmed, Cochrane Library, CNKI, Science On, RISS, OASIS were searched by keywords including 'scoliosis assessment', 'scoliosis screening', 'physical examination', 'functional measurement', 'photography', and 'smartphone'. Results: 32 articles using radiation-free assessments were identified from 1,011 records. The mostly used non-radiological methods were Surface topography, Scoliometer, Ultrasound, Digital Infrared Thermal Imaging, and Photography. The other methods were Gait analysis, 3D depth sensor imaging, and Low intensity electromagnetic scan. Conclusions: It was found that non-radiological assessment tools might reduce the number of radiographs taken in scoliosis patients. To increase the reliability and validity, further research on the measurement tools of scoliosis will be needed.

• Urogenital Tract Infection
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• 제13권3호
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• pp.58-65
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• 2018

Purpose: This study aimed to investigate the relationship between uropathogens of infants with febrile urinary tract infection (UTI) and vesicoureteral reflux (VUR). Materials and Methods: We analyzed 308 infants hospitalized for febrile UTI between January 2010 and December 2015, and assessed the voiding cystourethrography (VCUG). The medical records, including clinical symptoms, laboratory findings, urinalysis, urine culture tests, ultrasound (US), dimercaptosuccinic acid scan, and VCUG, were retrospectively obtained. The incidences of VUR and high-grade VURs (III, IV, and V) were analyzed in 4 groups categorized by uropathogens and renal US findings. Results: The mean age of 308 infants was $3.29{\pm}2.18months$. The male-to-female ratio was 3.46:1. In urine culture tests, 267 infants (86.69%) showed single bacterial uropathogen; Escherichia coli in 241 infants (78.25%) and non-E. coli uropathogens in 26 infants (8.44%). Multiple distinctive microorganisms were identified as causative uropathogens in 41 infants (13.31%). Abnormal findings of US and VCUG were identified in 216 and 64 patients, respectively. In 308 infants, the incidences of VUR and high-grade VUR were not different among the 4 groups. In 239 male infants, the incidences of high-grade VUR were higher in patients with non-E. coli single or multiple uropathogen and with abnormal US findings (p=0.042). Conclusions: In male infants with non-E. coli uropathogen or multiple uropathogens and with abnormal US findings at febrile UTI, there was an increased chance of finding high-grade VURs on subsequent VCUG tests.