사체를 이용한 이상근 주사 위치에 대한 해부학적 지표

민지혜,최은석,이원일,김고운,이베나 대한재활의학회 2008 Annals of Rehabilitation Medicine Vol.32 No.1

Objective: To identify the optimal site for piriformis muscle injection, using easily detectable sacroiliac joint as a landmark, under fluoroscopic guidance. Method: We examined the anatomic relationships of the sciatic nerve, piriformis muscle and sacroiliac joint in 18 buttocks from 9 cadavers. The distance from the inferior margin of the sacroiliac joint to the piriformis muscle at the crossing point with the sciatic nerve, and the width of the sciatic nerve at that point were measured. We assessed the depth of the piriformis muscle and the sciatic nerve using ultrasonography in asymptomatic controls. Results: The mean distance from the inferior margin of the sacroiliac joint to the piriformis muscle at the crossing point with the sciatic nerve was 15.7±3.4 (12∼22) mm laterally and 16.5±4.1 (10∼25) mm caudally. The mean width of the sciatic nerve at that point was 15.4±3.7 (12∼22) mm. Ultrasonographic findings revealed the mean distance as 4.48±0.49 cm from the skin to the surface of the piriformis muscle and as 5.68±0.62 from the skin to the surface of the sciatic nerve. Conclusion: The most optimal injection site for piriformis syndrome was located 15.6±3.4 (12∼22) mm laterally and 16.5±4.1 (10∼25) mm caudally from the inferior margin of the sacroiliac joint. Objective: To identify the optimal site for piriformis muscle injection, using easily detectable sacroiliac joint as a landmark, under fluoroscopic guidance. Method: We examined the anatomic relationships of the sciatic nerve, piriformis muscle and sacroiliac joint in 18 buttocks from 9 cadavers. The distance from the inferior margin of the sacroiliac joint to the piriformis muscle at the crossing point with the sciatic nerve, and the width of the sciatic nerve at that point were measured. We assessed the depth of the piriformis muscle and the sciatic nerve using ultrasonography in asymptomatic controls. Results: The mean distance from the inferior margin of the sacroiliac joint to the piriformis muscle at the crossing point with the sciatic nerve was 15.7±3.4 (12∼22) mm laterally and 16.5±4.1 (10∼25) mm caudally. The mean width of the sciatic nerve at that point was 15.4±3.7 (12∼22) mm. Ultrasonographic findings revealed the mean distance as 4.48±0.49 cm from the skin to the surface of the piriformis muscle and as 5.68±0.62 from the skin to the surface of the sciatic nerve. Conclusion: The most optimal injection site for piriformis syndrome was located 15.6±3.4 (12∼22) mm laterally and 16.5±4.1 (10∼25) mm caudally from the inferior margin of the sacroiliac joint.

A Case of Mediastinal Extramedullary Plasmacytoma Associated with Multiple Myeloma

민지혜,김태성,고영혜,김기현 대한영상의학회 2010 대한영상의학회지 Vol.62 No.4

Extramedullary plasmacytoma is a rare manifestation of multiple myeloma, and involvement of the mediastinum by extramedullary plasmacytoma is very rare. We report here on a rare case of a large mediastinal extramedullary plasmacytoma and several pleural nodules with pleural effusions in a 45-year-old male patient with multiple myeloma that involved the thoracic spine and the calvarium. The mediastinal extramedullary plasmacytoma manifested on CT as an 11 × 4.5 cm-sized, relatively homogeneous, mildly enhancing, anterior mediastinal mass with several pleural nodules, and this simulated malignant lymphoma or malignant thymic epithelial tumor.

Immobilization and Electrochemical Redox of Cytochrome c on Fullerene Nanohybrid TiO₂-Gel Layer

민지혜,박철순,양도현,오미혜,윤여성,신재섭 한국고분자학회 2008 한국고분자학회 학술대회 연구논문 초록집 Vol.33 No.2

정상 한국인 성인에서 초음파를 이용한 후경골건 직경과 단면적 연구

민지혜,이원일,고영진 대한재활의학회 2010 Annals of Rehabilitation Medicine Vol.34 No.5

Objective: To provide normal reference values of the sonographic diameters and cross sectional area (CSA) of the posterior tibialis tendon (PTT) in Korean adults for early diagnosis and treatment of PTT dysfunction. Method: 240 feet from 120 healthy volunteers (63 males; 57 females, mean age: 36.40±11.37) were included in this study. Those with a previous history of surgery or trauma to the lower extremities and systemic disease, such as, hypertension, diabetes, or rheumatoid arthritis were excluded. PTT was examined through ultrasonograhy with the patient placed in the prone oblique position, with the knee extended, and ankle dorsiflexed to neutral angle. We evaluated the anterioposterior (AP) and transverse diameter and CSA of the PTT along the line that connected from the posteroinferior angle of the medial malleolus to the heel. Results: The AP diameter of PTT measured by sonography was 3.42±0.03 mm and the transverse diameter of the PTT was 9.20±0.08 mm. The CSA was 21.46±0.26 mm2. Differences in diameters and CSA related to sidedness, sex did not show statistical significance (p>0.05). There was weak linear relationship in AP and transverse diameter and CSA with weight, height, leg and foot length. Conclusion: The normal Korean reference values of the PTT diameter and CSA that we obtained from ultrasonography can be used as useful reference data in diagnosing early pathologic conditions of PTT dysfunction. (J Korean Acad Rehab Med 2010; 34: 577-582)

Radiofrequency Ablation Combined with Chemoembolization for Intermediate-Sized (3-5 cm) Hepatocellular Carcinomas Under Dual Guidance of Biplane Fluoroscopy and Ultrasonography

민지혜,이민우,차동익,전용환,신성욱,조성기,임현철,임효근 대한영상의학회 2013 Korean Journal of Radiology Vol.14 No.2

Objective: To assess the technical feasibility and local efficacy of percutaneous radiofrequency ablation (RFA) combined with transcatheter arterial chemoembolization (TACE) for an intermediate-sized (3-5 cm in diameter) hepatocellular carcinoma (HCC) under the dual guidance of biplane fluoroscopy and ultrasonography (US). Materials and Methods: Patients with intermediate-sized HCCs were treated with percutaneous RFA combined with TACE. RFA was performed under the dual guidance of biplane fluoroscopy and US within 14 days after TACE. We evaluated the rate of major complications on immediate post-RFA CT images. Primary technique effectiveness rate was determined on one month follow-up CT images. The cumulative rate of local tumor progression was estimated with the use of Kaplan-Meier method. Results: Twenty-one consecutive patients with 21 HCCs (mean size: 3.6 cm; range: 3-4.5 cm) were included. After TACE (mean: 6.7 d; range: 1-14 d), 20 (95.2%) of 21 HCCs were visible on fluoroscopy and were ablated under dual guidance of biplane fluoroscopy and US. The other HCC that was poorly visible by fluoroscopy was ablated under US guidance alone. Major complications were observed in only one patient (pneumothorax). Primary technique effectiveness was achieved for all 21 HCCs in a single RFA session. Cumulative rates of local tumor progression were estimated as 9.5% and 19.0% at one and three years, respectively. Conclusion: RFA combined with TACE under dual guidance of biplane fluoroscopy and US is technically feasible and effective for intermediate-sized HCC treatment.

정보화현장 : 시도,새올 통합운영지원센터 소개

민지혜 한국지역정보개발원 (구 자치정보화조합) 2008 지역정보화 Vol.52 No.-

이중경매 이론을 이용한 절충교역이 무기 교역에 미치는 영향 분석

민지혜,변정욱 한국방위산업학회 2018 韓國防衛産業學會誌 Vol.25 No.4

This paper analyzes the effects of arms trade offsets on the bargaining strategy and bargaining outcomes using the double auction model. The main results are as follows. The price of arms trade with offsets increases in proportion to the buying country’s value of offsets and the selling country’s cost of offsets. If the buying country’s value of offsets is greater (less) than the selling country’s cost, offsets increase (decrease) the possibility of arms trade and the expected payoffs of both countries. The higher the buying country’s offset benefits are and the lower the selling country’s offset costs are, the greater the expected payoffs of the arms trade are for both countries. Therefore, offsets should be considered only if the buying country’s benefit is greater than the selling country‘s cost. 본 논문은 구매국과 판매국이 상대방 정보에 대한 불확실성이 존재하는 상황에서 절충교역의 존재 여부가 판매국과 구매국의 협상전략과 협상 결과에 미치는 영향을 게임이론의 이중경매(double auction) 모형을 활용하여 분석한다. 주요 결과로는 절충교역이 존재하는 경우 무기교역의 거래 가격은 절충교역이 없는 경우 대비 절충교역조건의 구매국 가치와 판매국 비용에 비례하여 상승한다. 절충교역의 구매국 혜택이 판매국 비용보다 클 경우 절충교역을 함으로써 절충교역이 없는 경우보다 무기거래 협상의 성공 가능성이 증가하며, 반대의 경우에는 협상의 성공 가능성이 감소한다. 절충교역의 구매국 혜택이 크며 판매국 비용이 적을수록 절충교역을 통해 양국 모두 절충교역의 기대이득이 커지며, 반대의 경우는 오히려 절충교역이 구매국과 판매국의 기대이득을 감소시킨다. 따라서 전자와 같은 조건에서만 절충교역을 추진하는 것이 바람직하다.

대학생들의 고카페인 에너지음료섭취 행동과 부작용 연구

민지혜,박현정,윤신영,양진솔,최서정,박지영,김범식 한국식품영양학회 2021 한국식품영양학회 학술대회논문집(학술심포지움) Vol.2021 No.11

전류제어시스템을 이용한 전동식 그리퍼의 제어방법

민지혜,김갑순 한국정밀공학회 2023 한국정밀공학회지 Vol.40 No.9

This paper describes the control method of an electric gripper using a current control system. A current control system was designed and fabricated, and it consisted of a current sensor, an amplifier, and a precision voltage regulator. As a result of calibration by applying the current control system to the electric gripper, the error was less than ±0.34%. The proportional gain for the PI control of the gripper was 0.41, and the integral gain was 0.01. As a result of the control characteristics test, the arrival time was 0.79 s and the steady-state error was ±5 mV (±0.025 N). As a result of the experiment of holding the object, the gripper was able to hold the object safely. Therefore, the electric gripper applied using the current control system performed excellently in current control based on the reference force (grabbing force); thus, it is judged that it can be used to safely grip various objects in various fields.

국가 위기 상황에서 과학 자문의 역할

민지혜 과학기술정책연구원 2022 Future Horizon Vol.- No.52