• Maxillofacial Plastic and Reconstructive Surgery
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• v.13 no.4
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• pp.355-369
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• 1991

미세수술을 이용한 재건외과 분야에서 빈번히 혈관이식이 요구된다. 이러한 경우 자가정맥이 가장 널리 사용되고 있으며 그의 신뢰성도 인정되어 있다. 그러나 정맥 채취에 따르는 부가적인 수술이 요구되며 혈관 공여부에 또다른 결손을 초래한다. 동결건조동종정맥은 이러한 점을 보완하고 자가정맥을 대체할 수 있는 잠재성이 있다. 이에 동결건조동종정맥의 효율성을 알아보고자 2.5cm 길이의 가토대퇴정맥을 $-65^{\circ}C$, 200 mtorr의 음압으로 동결건조시킨 다음 대퇴동맥 결손부에 동종이식하고(n=24), 신선한 가토대퇴정맥 동종이식군(n=24)과 자가정맥이식군(n=24)을 1주 간격으로 4주간 비교 관찰하였다. 2주 개존율은 동결건조동종정맥 이식군, 100%;동종정맥이식군, 50%; 자가정맥이식군, 100%이었으며 4주 개존율은 동결건조동종정맥이식군, 83.3%;동종정맥이식군, 50%;자가정맥이식군, 100%로서 동결건조처치만으로 동종정맥이식의 생존율을 증가시켰다. 미세임파구세포독성검사에서는 동결건조정맥의 항원성이 상당히 낮아져있음을 알 수 있었다. 그러나 동결건조정맥의 내막세포화가 주사전자현미경 및 광학현미경 소견상 자가정맥보다 지연됨이 관찰되었다. 이러한 결과를 종합해 볼 때 동결건조동종정맥은 아무런 처치를 하지않은 신선 동종정맥보다 현저한 장점이 있었지만, 자가정맥이식을 대신할 수 있는 보다 더 좋은 대체방법이라는 견지에서는 임상 적용이 어려울 것으로 사료되었다.

• Journal of Chest Surgery
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• v.34 no.3
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• pp.231-234
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• 2001

배경: 하지 정맥률의 치료법중의 하나인 압박경화요법의 치료효과를 알아보고자 하였다. 대상 및 방법: 영동세브란스병원에서 1997년 8월부터 1999년 8월까지 복대-대퇴정맥판막 부전이 없는 하지정맥류 환자 중 압박경화용법을 시행 받은 94명을 대상으로 하였다. 병역 및 이화학적 검사결과, 압박경화용법의 치료효과와 합병증 등을 살펴보았다. 결과: 환자의 연령은 20대에서부터 70대까지 있었으며, 평균 43.4세였고 성별은 남자가 28명 여자가 66명 이었다, 정맥의 돌출 이외에 다른 증상은 없는 환자가 87명이었으며, 다리가 무거운 증사, 피로, 통증도 각각 1예, 2예, 2예가 있었다. 대상 환자 중에서는 소복재정맥에 이환된 사람이 83예이었다. 50명환자에서 1회의 시술만으로 만족할 만한 결과를 보였으며, 시술 후의 합병증으로 부분적인 열감, 정맥염, 괴사가 있었다. 결론: 복재-대퇴정맥판막 부전이 없는 하지정맥류의 치료에 있어 경화요법은 미용적으로 우수한 효과적인 치료법으로 생각된다.

• Journal of Chest Surgery
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• v.40 no.2 s.271
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• pp.97-102
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• 2007

Background: Endovenous laser treatment has recently been introduced as a less invasive technique, with many good results reported, A 980-nm diode laser was used on the great saphenous vein (GSV) occlusions in patients with varicose veins, due to GSV reflux, and the therapeutic effects analyzed. Material and Method: Between September 2003 and February 2006, 238 patients (332 cases) with GSV reflux underwent endovenous laser treatment with a 980-nm diode laser. Operative procedures were simultaneous endovenous laser treatment and ambulatory phlebectomy. The preoperative clinical findings, postoperative complications and postoperative duplex US follow up results at 1 and 3 months were reviewed. Result: Postoperative complications were ecchymosis in almost cases, paresthesia 68 cases (20.5%) and skin burn in 3 cases (0.9%). Follow up duplex US revealed 26 and 10 cases at 1 and 3 months of GSV reflux or partial recanalization, with therapeutic success rates of 91.3 and 87.9%, respectively. Conclusion: The treatment of GSV occlusion with an endovenous laser is less invasive than traditional GSV stripping, but relatively high recanalization was experienced, possibly due to inadequate laser power, laser fiber pullback speed or an extremely dilated GSV. However, continuous attempts will be required to reduce the recanalization after the procedure, with accurate follow up using duplex US.

• Investigative Magnetic Resonance Imaging
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• v.16 no.2
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• pp.152-158
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• 2012

Purpose : To compare the arterial and venous detection sites of triggering methods in contrast-enhanced-MR-venography (CE-MRV) for the evaluation of intracranial venous system. Materials and Methods: 41 healthy patients underwent CE-MRV with autotriggering at either the cavernous segment of internal carotid artery with an inserted time-delay of 6 seconds (n = 20) or the superior sagittal sinus without any timedelay (n = 21). 0.1 mmol/kg gadolinium-based contrast material ($Magnevist^{(R)}$, Schering, Germany) was intravenously injected by hand injection. A sagittal fast-spoiled-gradient-echo-sequence ranging from one ear to the other was performed (TR/TE5.2/1.5, Matrix $310{\times}310$, 124 sections in the 15-cm-thick volume). 17 predefined venous structures were evaluated on all venograms by two neuroradiologists and defined as completely visible, partially visible, or none visible. Results: The rate of completely visible structures were 272 out of 323 (84%) in the arterial triggering CE-MRV and 310 out of 340 (91%) in the venous triggering CE-MRV. The venous triggering CE-MRV demonstrated an overall superior visualization of the cerebral veins than the arterial triggering CE-MRV (Fisher exact test, p < 0.006). Conclusion: CE-MRV using venous autotriggering method provides higher-quality images of the intracranial venous structures compared to that of arterial.

• Journal of Chest Surgery
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• v.31 no.6
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• pp.619-623
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• 1998

A 51-year-old male with chronic renal failure had marked swelling and tenderness of the right arm. Venography revealed central vein occlusion involving stenosis of right proximal subclavian vein, right internal jugular vein, and left distal innominate vein, and obstruction of right brachiocephalic vein. Multiple obstruction of these veins was thought to have resulted from repeated subclavian catheterization. Right subclavian-superior vena cava was bypassed with 10 mm Gore-tex vascular graft and then left subclavian vein with 8 mm Gore-tex vascular graft was bypassed to the 10 mm Gore-tex vascular graft. The results were excellent.

• Journal of Chest Surgery
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• v.39 no.1 s.258
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• pp.72-75
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• 2006

In a 40 year-old man who has complained of epigastric pain and dyspnea for 10 days including melena for 1 month, abdominal ultrasonography and computerized tomography revealed a large, solid mass in the right kidney and thrombus of inferior vena cava (IVC) that extended to the cavoatrial junction. Renal cell carcinoma was performed by percutaneous needle biopsy. IVC thromboembolectomy was performed using centrifugal pump driven venovenous bypass without cardiac arrest and cardiopulmonary bypass (CPB).

• 대한생식의학회:학술대회논문집
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• 2005.06a
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• pp.31-64
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• 2005

위에서 살펴본 바와 같이 준임상적 정계정맥류이 존재가 불임 환자에서 가지는 중요성에 관하여는 아직 논란이 많다. 하지만 실제적인 정계정맥류의 크기와 신체검사에서 촉진되는 정계정맥류의 크기가 항상 일치하지는 않는다는 사실과 준임상적인 정계정맥류라 할지라도 고환에 악영향을 끼칠 수 있는 잠재력이 있음을 고려할 때, 준임상적 정계정맥류의 임상적 중요성을 결코 간과해서는 안 될 것이다. 비록 현재는 불임의 치료로서 준임상적 정계정맥류의 제거술의 잇점이 뚜렷이 규명되지는 않았지만, 불임을 주소로 내원한 환자에 있어 준임상적 정계정맥류의 존재는 항상 염두에 두어야 할 사항이라 생각된다. 또한 앞으로도 준임상적 정계정맥류의 치료 효과 및 필요성에 관하여는 잘 계획된 많은 연구들이 필요할 것으로 사료된다.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.687-689
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• 2021

정맥을 이용한 생체 인식 방법은 신체의 노화에 영향을 받지 않고 높은 사용 편의성과 변조의 위험이 적어 인증 수단으로 폭넓게 활용되고 있다. 그러나 가짜 정맥 영상을 통한 스푸핑 공격 위험이 존재한다. 이러한 문제를 해결하기 위해 실제 정맥 영상과 가짜 정맥 영상을 구분하는 기술이 필요하다. 본 연구에서는 실제 정맥 데이터의 마디와 뼈의 밝기 차이를 이용해 진짜 정맥 영상과 가짜 정맥 영상을 구분하는 기술을 연구했다.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.15 no.6
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• pp.485-491
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• 2022

Intravenous injection is the most frequent invasive treatment for inpatients and is widely used for parenteral nutrition administration and blood products, and more than 1 billion procedures are used for peripheral catheter insertion, blood collection, and other IV therapy per year. Intravenous injection is one of the difficult procedures to be performed only by trained nurses with intravenous injection training, and failure can lead to thrombosis and hematoma or nerve damage to the vein. Accordingly, studies on auxiliary equipment capable of visualizing the vein structure of the back of the hand or arm are being published to reduce errors during intravenous injection. This study is a study on the performance difference according to the number of LEDs irradiating the 850nm wavelength band on a vein detector that visualizes the vein during intravenous injection. Four LED PCBs were produced by attaching NIR filters to CCD and CMOS camera lenses irradiated on the skin to acquire images, sharpen the acquired images using image processing algorithms, and project the sharpened images onto the skin. After that, each PCB was attached to the front end of the vein detector to detect the vein image and create a performance comparison questionnaire based on the vein image obtained for performance evaluation. The survey was conducted on 20 nurses working at K Hospital.

• Journal of Chest Surgery
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• v.43 no.5
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• pp.534-537
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• 2010

A twenty six year old man was admitted to our clinic for bleeding from a venous ulcer of the left leg. His left femoral vein had been ligated for bleeding control after a traffic accident that happened when he was 5 years old. He had a varicose vein, stasis dermatitis, and a venous ulcer on his left leg. To shunt left femoral venous return to the right femoral vein, we did a crossover bypass with arteriovenous fistula using the right greater saphenous vein. To get good patency of the arteriovenous fistula, the bypass graft was closed 6 weeks after the initial operation. He maintained his left leg circumference relatively well for 6 months after the operation. We report the case of a patient who had a vein crossover bypass for a chronic femoral vein ligation.