Yang Won Nah
University of Ulsan
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Publication
Featured researches published by Yang Won Nah.
World Journal of Gastrointestinal Surgery | 2014
Chan Sung Park; Kwang Won Seo; Chang Ryul Park; Yang Won Nah; Jae Hee Suh
Gastric perforation and tuberculous bronchoesophageal fistula (TBEF) are very rare complications of extrapulmonary tuberculosis (TB). We present a case of pulmonary TB with TBEF and gastric perforation caused by a multidrug-resistant tuberculosis strain in a non-acquired immune deficiency syndrome male patient. The patient underwent total gastrectomy with Roux-en-Y end-to-side esophagojejunostomy and feeding jejunostomy during intravenous treatment with anti-TB medication, and esophageal reconstruction with colonic interposition and jejunocolostomy were performed successfully after a full course of anti-TB medication. Though recent therapies for TBEF have favored medication, patients with severe stenosis or perforation require surgery and medication with anti-TB drugs based upon adequate culture and drug susceptibility testing.
Transplantation | 2018
Yang Won Nah; Hyung Woo Park; Jin A Kwon; In Young Huh; Sun Eun Park; Seo Hee Ahn; Shin Jae Kim
Introduction Pulmonary hypertension (PH) is defined as an elevated mean pulmonary arterial pressure (mPAP) ≥25 mmHg at rest. The perioperative management can be complicated by hemodynamic instability resulting in severe hypoxemia, acute right heart failure/circulatory collapse and death. Portal hypertension is a curable cause for PH. However, Krowka et al reported that mPAP of 50 mmHg or greater was associated with 100% cardiopulmonary mortality in liver transplantation (LT) setting. Materials and Methods A 45 years old male patient underwent LDLT for HBV + alcoholic cirrhosis and HCC. MELD score was 28. Echocardiography performed 2 months before the operation showed right ventricular systolic pressure (RVSP) 62 mmHg and maximum tricuspid regurgitant jet velocity (TRVmax) 3.8m/sec, suggesting moderate resting PH. During anesthetic induction, pulmonary vascular resistance (PVR) was measured as 246 dynes/sec/cm-5 and mPAP as 52mmHg. One hour later, they were 217 and 40, respectively, with infusion of Isosorbide 1mcg/Kg/min. Vital signs were stable and PaO2 level was 223 mmHg. So we decided to proceed with surgery despite of moderate PH. Results Graft weighed 550g and GRWR was 0.74. The living donor LT procedure was done with modified right lobe graft. Additionally portal vein endthrombectomy, direct ligation of a large splenorenal shunt and splenic artery ligation was done. The operation took 850 minutes and 24 pints of RBC, 16 pints of FFP, 8 pints of PC and 10 pints of cryoprecipitate. PVR and mPAP were in the range of 217~149 and 46~31, respectively. Alprostadil 7mcg/hr was started just after finishing arterial anastomosis and was infused for 7 days thereafter. Extubation was done 9 hours after the operation and liquid diet was begun 2 days after the operation. The day after LT, RVSP was 96 mmHg and TRVmax 4.9m/sec. And 5 days after LT, he complained of dyspnea and Beraprost (prostacyclin pathway agonist) was given orally. Even with mild dyspnea, the patient was discharged on foot 19 days after LT. 6 weeks after LT RVSP was measured as 84 mmHg and TRVmax 4.0m/sec. mPAP was 63 mmHg on right heart catheterization. On CT scan, there was marked hepatic congestion resulting from pulmonary hypertension. Endothelin receptor antagonist Ambrisentan was given orally. The patients breathing difficulty almost disappeared soon. Now, 3 months after the operation, he returned to work. Conclusion The authors conducted LDLT in a case of severe pulmonary hypertension with mean PAP 50 mmHg successfully by careful intraoperative monitoring and postoperative management. When encountered a case of moderate to severe pulmonary hypertension during LT, initial response to anesthetic management might dictate whether to proceed with LT or not.
Transplantation Proceedings | 2008
Yang Won Nah; Chang-Woo Nam; Jae-Hee Suh; Hee Jeong Cha; Gyu-Yeol Kim; Sang Jun Park; Y. Oh; Hong-Rae Cho
Simultaneous liver and kidney transplantation (SLKT) is now considered the treatment of choice for patients with concurrent end-stage liver and kidney diseases. Even though the early postoperative mortality rate following SLKT is reported to be high compared to that of liver transplantation alone, the liver graft from the same donor has been argued to induce better kidney graft acceptance as evidenced by a low rate of acute renal rejection episodes. There have been many reports of a low incidence of acute renal rejection following SLKT; however, only a few cases were proven by simultaneous biopsies. The authors experienced a case of biopsy-proven isolated acute cellular rejection of the liver graft following SLKT.
Hepato-gastroenterology | 2005
Yang Won Nah; Jae-Hee Suh; Dae Hwa Choi; Byung Kyun Ko; Chang Woo Nam; Gyu Yeol Kim; Young Cheol Im; Hong Rae Cho
Hepato-gastroenterology | 2014
Kyoung Kh; Sung-Gyu Lee; Chang Woo Nam; Yang Won Nah
Journal of The Korean Surgical Society | 2008
Gyu Yeol Kim; Dae Hwa Choi; Young Chul Lim; Byung Kyun Ko; Sang June Park; Yang Won Nah; Hong Rae Cho; Chang Woo Nam
The Journal of The Korean Society for Transplantation | 2014
Kyoung Jee Seo; Yang Won Nah; Chang Woo Nam; Sang Jun Park; Hong Rae Cho
Nuclear Medicine Communications | 2018
Hyung Rae Kim; Minjung Seo; Yang Won Nah; Hyung Woo Park; Seol Hoon Park
The Journal of The Korean Society for Transplantation | 2016
Byeong Ju Kang; Hyung Woo Park; Yang Won Nah
Journal of Acute Care Surgery | 2015
Yo Hwan Kim; Hong Rae Cho; Byung Kyun Ko; Yang Won Nah; Chang Woo Nam; Sang Jun Park; Song-Soo Yang; Kyu-Hyouck Kyoung