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김송이,조성신,조민지,민상일,안상현,하종원,민승기 대한혈관외과학회 2017 Vascular Specialist International Vol.33 No.1
A 71-year-old woman presented with an enlarging mass in the right buttock, with pain and tingling sensation in sitting position. Five years ago, she was diagnosed with acute limb ischemia due to acute thrombosis of right persistent sciatic artery (PSA), and she underwent successful thromboembolectomy and femorotibioperoneal trunk bypass. Computed tomography angiography revealed a huge PSA aneurysm (PSAA). During the previous bypass, the distal popliteal artery was ligated just above the distal anastomosis to exclude the PSAA, whose proximal end was already thrombosed. However, PSAA has grown to cause compression symptoms, and the mechanism of aneurysm growth can be ascribed to type 1a or type 2 endoleak. In order to relieve the compression symptoms, aneurysm excision was performed without any injury to the sciatic nerve. A postoperative tingling sensation due to sciatic-nerve stimulation in the supine position resolved spontaneously one month after surgery.
Femoral Endovenectomy with Iliac Stenting for Chronic Iliofemoral Venous Occlusion
조원표,조성신,조민지,안상현,민상일,하종원,민승기 대한혈관외과학회 2017 Vascular Specialist International Vol.33 No.4
A 62-year-old man with progressive swelling on his left thigh and leg was referred to the Division of Vascular Surgery. Anticoagulation therapy did not prevent or improve the symptoms of chronic deep vein thrombosis (DVT) from his left external iliac vein to posterior tibial vein. He had no trauma history nor any accidents. He underwent femoral endovenectomy, thrombectomy and stent insertion in left iliac vein. The patient had additional balloon angioplasty for stenosis in left common femoral vein. He had an uneventful postoperative recovery without complication. Leg swelling has been improving and follow-up continues under anticoagulation. We report a case of femoral endovenectomy with iliac stenting, which may be an efficacious treatment for chronic DVT.
박대도,조성신,한아람,최찬중,안상현,민상일,하종원,민승기 대한의학회 2018 Journal of Korean medical science Vol.33 No.40
Background: Limb salvage surgery with vascular reconstruction is currently considered as the standard treatment for extremity soft tissue sarcoma (STS), showing equivalent oncologic outcome compared with amputation. In this retrospective study, the surgical and functional outcomes after arterial or venous reconstruction in limb salvage surgery for STS were analyzed. Methods: Consecutive patients who underwent vascular resection and reconstruction as part of limb salvage surgery for extremity STS from July 2009 to June 2015 were included in this study. Incidence of surgical complication, graft patency, and patients' functional outcome were reviewed. Results: During the study period, 14 arteries and 13 veins were reconstructed in 17 patients (artery only in 4, vein only in 3, artery and vein in 10). Autologous great saphenous vein (GSV) was the most commonly used vascular conduit in both arterial and venous reconstruction (78.6% and 77.0%). The patency of synthetic graft was significantly lower than that of the autologous vein conduit (log rank test, P = 0.001). Among 15 patients with tumors in lower extremity, 13 were ambulatory after limb salvage surgery. During median follow up of 23.3 months (interquartile range 39.9 months), 2 patients (11.7%) needed amputation of the initially salvaged limb due to local recurrence. Conclusion: Limb salvage surgery of soft tissue tumor combined with vascular reconstruction showed favorable functional outcome with good local control. Autologous vein conduit is preferred over synthetic graft both in arterial and venous reconstruction.
Late Type 3b Endoleak Mimicking Type 2 Endoleak after Endovascular Aortic Aneurysm Repair
조민지,최찬중,조성신,김송이,민상일,안상현,하종원,민승기 대한혈관외과학회 2017 Vascular Specialist International Vol.33 No.2
Endovascular abdominal aortic aneurysm (AAA) repair has been widely used for the treatment of AAA as a safe and efficient method, but endoleaks causing persistent expansion of aneurysm sac may cause aneurysmal rupture and death. Type 3 endoleak is rare but a predominant cause of late rupture. Type 3b endoleak can be misdiagnosed as type 2 endoleak, which is more frequent. Here we report two cases of type 3b endoleak mimicking type 2 endoleak, which were successfully treated by open surgery of partial explantation of the stent-graft and endoaneurysmal interposition graft replacement.
맹선재,신동혁,주연준,하종신 대한금속재료학회(대한금속학회) 1992 대한금속·재료학회지 Vol.30 No.2
The superplastic properties of fine-grained 7475 Al alloy were investigated at 516℃ over the strain-rate range of 2.8 × 10^(-4)s : to 1.7 × 10^(-2)s^(-1). A significant improvement in superplastic elongation was achieved by adopting two-stage strain-rate deformation compared to a usual single strain-rate test. The initially higher strain-rate deformation in the first stage caused rapid microstructural changes including the conversion of subboundaries to high angle grain boundaries, The optimum stain-rate in the first stage was found to be 8.3 × 10^(-3)s^(-1). The specimens tested at lower strain-rates, revealed the dispersoid-free zones(DFZs) near grain boundaries normal to the stress axis. When a higher strain-rate was applied to the specimens with DFZs, the grain refining was not observed. This absence of grain refining was due to the concentration of plastic deformation in the weak DFZs.