콘크리트 포장의 표층 거친면마무리

박권재,안지환,민욱,조윤호,Park, Gwon-Jae,An, Ji-Hwan,Mim, Uk,Jo, Yun-Ho 한국도로학회 2002 도로포장공학회지 Vol.4 No.1

Outcomes of Mitral Valve Repair: Quadrangular Resection versus Chordal Replacement

박권재,우종수,이정훈,박종윤 대한흉부외과학회 2013 Journal of Chest Surgery (J Chest Surg) Vol.46 No.2

Background: Mitral valve repair for posterior mitral leaflet (PML) prolapse has been considered to be a standard treatment because of its high success rate and high level of patient satisfaction. The aim of this study was to evaluate the clinical results of two different techniques of PML prolapse, quadrangular resection (QR) and chordal replacement (CR). Materials and Methods: The subjects consisted of 56 patients who had undergone mitral valve repair for PML prolapse between November 1997 and December 2010. The patients were divided into two groups according to surgical technique. Among them, 31 patients underwent QR (group QR) and 25 patients had CR (group CR). We reviewed the medical records of the patients retrospectively to compare the clinical outcomes of both groups. Results: After mitral valve repair, the degree of mitral regurgitation (MR) in both groups decreased to the to a mild degree or less and the amount of remnant MR was slightly higher in the CR group but it was not statistically different. Three patients received mitral valve-related reoperation (2 in the QR group and 1 in the CR group). Freedom from mitral valve-related reoperation at 7 years was 93% for the QR group and 96% for the CR group and was not significantly different between the two groups. Conclusion: Both QR and CR showed excellent long-term results and were considered equally effective methods for PML prolapse.

대동맥 근부 복합 인공 판막 도관 치환술에 관한 임상적 고찰

박권재,우종수,조광조,방정희,정상석 대한흉부외과학회 2010 Journal of Chest Surgery (J Chest Surg) Vol.43 No.3

Background: A composite valve graft replacement has been used for a variety of aortic root diseases. The aim of this study was to evaluate the mid-term results of this technique. Material and Method: We conducted a retrospective analysis of aortic root composite valve graft replacements in 39 patients and these procedures were done at our institution between 1992 and 2009. The mean age of the patients was 49.2±16.4 years. The mean follow-up was 64.2±53.4 months (maximum: 176 months). Result: There were 4 hospital deaths (8.6%) due to emergency aortic dissection and 4 late deaths owing to several causes. The causes of late death were 2 ruptures of a remnant aneurysm, 1 subdural hemorrhage and 1 paravalvular leakage. The calculated survival rate was 93.5%, 85.0% and 85.0% at 1, 5 and 10 years, respectively. There were 3 cerebrovascular accidents during the follow up period. The rate of freedom from cerebrovascular accidents was 97.0%, 92.0% and 80.0% at 1, 5 and 10 years, respectively. All of these brain accidents were hemorrhage-related complications. Conclusion: A composite valve graft replacement of the aortic root was associated with favorable results. So, this technique seems to be a good method to treat various aortic root diseases. 배경: 복합 인공 판막 도관(composite valve graft) 치환술은 다양한 대동맥 근부 질환들에 사용되어 왔다. 이 연구의 목적은 이 술기에 대한 중기 결과를 알아보는 데 있다. 대상 및 방법: 1992년부터 2009년까지 대동맥 근부 복합 인공 판막 도관 치환술을 받은 39명의 환자를 대상으로 후향적 조사를 하였다. 환자들의 평균 나이는 49.2±16.4세였고, 평균 추적 관찰 기간은 64.2±53.4개월이었다(최대 기간, 176개월). 결과: 4명(8.6%)의 병원 내 사망이 있었고 모두 응급 대동맥 박리인 경우였다. 4명의 만기 사망이 있었는데 2명은 잔류 대동맥류, 1명은 경막하 출혈, 1명은 판막 주위 역류가 원인이었다. 생존율은 각각 1년, 5년, 10년에 93.5%, 85.0%, 85.0%였다. 추적 관찰 기간 동안 3명의 환자에서 뇌혈관 사고가 발생하였고, 뇌혈관 사고로부터의 자유율은 각각 1년, 5년, 10년에 97.0%, 92.0%, 80.0%였다. 모든 뇌혈관사고는 출혈과 연관된 합병증이었다. 결론: 복합 인공 판막 도관을 이용한 대동맥 근부 치환술은 좋은 결과를 보여 왔다. 그러므로 이 술기는 다양한 대동맥 근부 질환의 치료에 좋은 방법이라 할 수 있다.

Clinical Effect of Left Ventricular Dysfunction in Patients with Mitral Stenosis after Mitral Valve Replacement

박권재,우종수,박종윤,정재화 대한흉부외과학회 2016 Journal of Chest Surgery (J Chest Surg) Vol.49 No.5

Background: Mitral stenosis (MS) remains one of the important heart diseases. There are many factors that influence the clinical outcomes, and little is known about how left ventricular (LV) dysfunction clinically affects the prognosis of the patient with MS after mitral valve replacement (MVR). We reviewed our clinical experiences of MVR in patients with MS who had LV dysfunction. Methods: Between January 1991 and January 2013, 110 patients with MS who underwent MVR were analyzed and divided into two groups according to ejection fraction (EF). Group 1 (EF≤45%) included 13 patients and group 2 (EF>45%) included 97 patients. Results: Thromboembolism occurred in 8 patients after MVR (group 1: n=3, 23.1%; group 2: n=5, 5.2%) and its incidence was significantly higher in group 1 than in group 2 (p=0.014). There were 3 deaths each in groups 1 and 2 during follow-up. The overall rate of cardiac-related death in group 1 was significantly higher than in group 2 (group 1: n=3, 23.1%; group 2: n=3, 3.1%; p=0.007). The cumulative survival rate at 1 and 15 years was 83.9% and 69.9% in group 1 and 97.9% and 96.3% in group 2 (p=0.004). The Cox regression analysis revealed that survival was significantly associated with postoperative stroke (p=0.011, odds ratio=10.304). Conclusion: This study identified postoperative stroke as an adverse prognostic factor in patients with MS a fter MV R, a nd a s more p revalent in patients w ith LV d ysfunction. Postoperative stroke should be reduced to improve clinical outcomes for patients. Preventive care should be made in multiple ways, such as management of LV dysfunction, atrial fibrillation, and anticoagulation.

Continuous “Over and Over” Suture for Tricuspid Ring Annuloplasty

박권재,우종수,정상석,이정훈 대한흉부외과학회 2012 Journal of Chest Surgery (J Chest Surg) Vol.45 No.1

Background: A ring implantation in the tricuspid annulus requires many interrupted mattress sutures for correction of tricuspid regurgitation (TR). In this study, tricuspid ring annuloplasty was performed by 2-0 polypropylene continuous suture instead of multiple interrupted 2-0 polyester mattress sutures, and the efficacy of the method was evaluated. Materials and Methods: This study included 20 patients who underwent tricuspid ring annuloplasty by continuous suture between May 2009 and July 2010. Four of the patients had an isolated TR, and the rest had a left-sided cardiac lesion. The concomitant tricuspid annuloplasty was performed after the left-sided heart surgery was completed and a Duran flexible ring prosthesis was used. Results: There was no perioperative mortality or conduction problem. More than a moderate degree of TR was improved to less than a mild degree after the procedure. After the ring annuloplasty, the right atrial volume decreased from 123.7±69.2 mL to 74.5±37.4 mL, and the mean right atrial pressure was lowered from 18.7±12.2 mmHg to 8.9±5.5 mmHg. Conclusion: The continuous “over and over” suture may be a useful procedure for fixing the ring to the annulus and making an intentional annular placation in performing tricuspid ring annuloplasty.

Left Atrial Myxoma Presenting with Unusual Cystic Form

박권재,우종수,박종윤 대한흉부외과학회 2013 Journal of Chest Surgery (J Chest Surg) Vol.46 No.5

Cardiac myxomas are the most common primary benign tumors of uncertain etiology. They usually present as polypoid or oval-shaped masses projecting into a heart chamber from the interatrial septum and have a soft, gelatinous consistency without a cystic structure. We report a case of left atrial myxoma with a single cystic form.

냉동 절제를 이용한 변형된 Maze술 식의 중장기 결과

박권재,우종수,방정희 대한흉부외과학회 2008 Journal of Chest Surgery (J Chest Surg) Vol.41 No.6

Background: Atrial fibrillation is associated with several complications such as cerebro-vascular accidents and peripheral arterial embolism. Most of the patients who have this arrhythmia chronically feel their heart beating and so they are frightened; therefore, the quality of a patient's life is decreased. The purpose of this article is to determine the long term results of a modified Maze procedure and the factors that influence the success of the procedure. Material and Method: This study enrolled 88 patients who underwent the modified Maze with using cryoablation between June, 2001 and February, 2007. The 88 consecutive patients were divided into two groups according to how the pulmonary veins were isolated, that is, with or without cryoablation. There were 58 patients who were isolated by cutting and sewing in the right pulmonary veins and by cyroablation in the left pulmonary veins in group 1 (group 1, n=58), and 30 patients who underwent isolation by cryoablation in the right & left pulmonary veins were placed in group 2 (group 2, n=30). The ECG was checked at discharge to determine the sinus conversion rate and we followed up the patients to determine whether or not the patients maintained sinus rhythm. We also checked the ECG at the last visit to determine the patients' heart rhythm. Result: The mean follow up time was 44.3±19.2 months. At discharge, 72.4% of the patients in group 1 were in proper sinus rhythm and 66.7% of the patients in group 2 were in proper sinus rhythm. At the last follow up, 81% of the patients in group 1 were in normal sinus rhythm and 60% of the patients in group 2 were in normal sinus rhythm. When we analyzed the data via the Kaplan-Meier method, 86.5% of the patients were free from atrial fibrillation (% free from AF) at 1 year, 80% of the patients were free from atrial fibrillation at 5 year in group 1 and 70% of the patients were free from atrial fibrillation at 1 year and 51% of the patients in group 2 were free from atrial fibrillation at 5 year. Conclusion: The modified Maze technique using cryoablation was a simple and effective procedure. But the success rate of the Maze technique using cryoblation is lower than that of the standard Maze Ⅲ. The method using cryoablation shorten the operation time, but we must conduct more studies to get a better result of the modified Maze technique with using cryoablation.

OPCAB 시행 전 Clopidogrel 사용이 술 후 출혈경향에 미치는 임상적 고찰

박권재,우종수,방정희,정상석 대한흉부외과학회 2009 Journal of Chest Surgery (J Chest Surg) Vol.42 No.3

Background: Clopidogrel is widely used just before coronary artery bypass surgery, yet its pharmacological effect can cause postoperative bleeding-related complications. The purpose of this study was to find the effect of preoperative clopidogrel exposure on the blood transfusion requirement and on the rate of reexploration for bleeding control and the rate of readmission caused by bleeding in patients who undergo off-pump coronary artery bypass surgery (OPCAB). Material and Method: This study included 103 patients who had been on clopidogrel preoperatively and they underwent OPCAB by one surgeon from January, 2005 to November, 2007. We divided the patients into two groups. Group 1 consisted of 45 patients who stopped cloidogrel 5 days before surgery and group 2 consisted of 58 patients who were taking clopidogrel within 5 days before surgery. Two groups were compared in terms of the bleeding related reoperation rate and the readmission rate, the amount of postoperative bleeding and the required amount of transfusion. Result: There were no significant differences between the two groups concerning the demographic, echocardiographic and hematologic features. There were no significant differences in the postoperative bleeding amount, but the amount of required transfusion was greater in group 2 (p=0.018). While group 1 showed a 0% reoperation rate for hemostasis and a 0% readmission rate as related to postoperative bleeding, group 2 showed a 6.9% reoperation rate and a 5.2% readmission rate, but there were no statistically significant differences between the two groups. Conclusion: Continuous use of clopidogrel did not cause postoperative major bleeding, but it can increase the amount of bleeding and the amount of required transfusion postoperatively. We think that discontinuation of clopidogrel for a while before elective OPCAB can help the patient`s postoperative recovery. 배경: 광범위한 clopidogrel의 사용으로 인해 관상동맥우회로술 전 많은 경우에서 clopidogrel 복용 환자들을 경험하게 된다. 그러나 clopidogrel은 그 고유한 약리 작용으로 인하여 술 후 출혈과 관련한 합병증을 일으킬 수 있다. 저자들은 술 전 clopidogrel의 사용이 무심폐기하 관상동맥우회로술(off-pump coronary bypass grafting, OPCAB)후의 수혈 요구량, 지혈을 위한 재수술율 및 출혈과 관련한 재입원율 등에 미치는 영향을 알아 보고자 하였다. 대상 및 방법: 이 연구는 2005년 1월부터 2007년 11월까지 단일 수술자에 의해 시행된 무심폐기하 관상동맥우회로술을 받은 환자 중, 수술 전 clopidogrel을 복용하고 있던 103명의 환자를 대상으로 하였다. 이 중 clopidogrel을 수술 5일 전에 복용을 중단한 군을 그룹 1 (n=45)으로 하고, 수술 5일 이내에도 계속 복용한 군을 그룹 2 (n=58)로 나누어 출혈과 관련한 재수술율 및 재입원율, 혈액 투여량, 술 후 출혈양 등을 비교 검토하였다. 결과: 두 군 간의 인구학적 특성, 심초음파, 혈액학적인 특성은 비슷하였다. 술 후 출혈양은 통계적으로 유의하게 차이가 나지는 않았지만, 술 후 수혈양은 그룹 2에서 더 많았다(p=0.018). 지혈을 목적으로 한 재수술율과 출혈과 연관된 재입원율은 그룹 1에서는 각각 0%, 0%였고, 그룹 2에서는 6.9%, 5.2%였다. 그러나 두 군 간의 통계적인 차이는 없었다. 결론: 무심폐기하 관상동맥우회로술 시행 전 clopidogrel의 계속적인 사용은 술 후 주요한 출혈을 일으키지는 않지만 어느 정도는 출혈에 영향을 주고, 술 후 수혈양은 증가시켰다. 응급인 경우가 아니라면 술 전 clopidogrel을 일정 기간 끊는 것이 술 후 회복에 좋으리라 생각된다.

호흡기 보조를 받는 환자에서 발생한 하인두 천공

박권재 ( Kwon Jae Park ),박창민 ( Chang Min Park ),정상석 ( Sang Seok Jung ),방정희 ( Jung Hee Bang ) 대한외상학회 2014 大韓外傷學會誌 Vol.27 No.3

Hypopharyngeal perforation is a rare, but fatal, complication. Clinical signs and symptoms of this condition are neck pain, odynophagia, dysphagia, fever, vomiting, cervical swelling and subcutaneous emphysema. However, these signs are obscured in patient suffering from severe trauma who has had an endotracheal tube inserted, which delay proper evaluation and treatment. Here, we report a case of hypopharyngeal perforation in a trauma patient who had an endotracheal tube inserted for mechanical ventilation. [ J Trauma Inj 2014;27:75-78 ]

복재정맥 수확방법에 따른 이식편의 손상과 수술창의 합병증의 빈도

최종범,박권재,양현웅,이삼윤,최순호 대한흉부외과학회 2003 Journal of Chest Surgery (J Chest Surg) Vol.36 No.7

배경: 최근 들어 관상동맥 우회술에 장기 열림이 우수한 동맥 이식편이 주로 이용되고 있으나, 복재정맥도 부가되어 이용될 중요한 이식편으로 남아 있다. 더욱이 정맥의 주위조직의 손상이 적으면 이식편으로서 장기 열림도 우수하다는 보고가 있다. 본 연구는 복재정맥의 수확 방법 중 정맥 이식편의 손상을 줄이고 정맥수확 부위의 수술창 합병증을 줄일 수 있는 방법을 찾고자 하였다. 대상 및 방법: 관상동맥 우회술시 이식편으로서 대 복재정맥을 사용했던 34예의 환자들에서 50개의 수확 부위를 선택하여 비교 관찰하였다. 25 정맥 이식편의 수확부위(제 1군)는 무릎아래의 장딴지에 대복재정맥을 따라 긴 절개를 하고 정맥의 주위조직을 깨끗이 박리하였으며, 10 수확부위(제 2군)는 무릎위의 대퇴부에서 내시경을 이용하여 정맥 이식편을 수확하였다. 다른 15 수확부위(제 3군)는 대퇴부의 대 복재정맥을 따라 3개의 분리된 절개를 만들어 정맥의 주위 조직을 일부 포함하여 무딘 박리로 복재정맥을 박리하였다. 결과: 정맥 이식편의 수확시간은 내시경 방법에서 가장 길었고(44.7±9.8분) 대퇴부위의 절개방법에서 가장 짧았다(24.2±5.9분) (p=0.000). 수확 시 이식편의 분지 손상은 내시경 수확방법에서 가장 많았다. 대퇴부에서 수확한 정맥 이식편은 이식편당 연속문합수가 1.72±0.98개로 장딴지의 정맥 이식편(1.16±0.37개)보다 더 많았다(p=0.02). 가장 많은 수술창의 합병증으로는 입원 중 다리 부종으로 제 1군이 20부위(80%)에서 발생하여 가장 많았고(p=0.000) 수술창의 신경증상(저림)도 제 1군의 7부위(28%)에서 발생하여 제 1군이 다른 두 군보다 더 많은 합병증을 보였다(p=0.013). 수술창합병증의 위험인자는 절개방법이었으며, 부위별 위험도는 무릎하방(장딴지)이 상방(대퇴부)보다 더 높았다. 결론: 정맥 이식편의 수확에 있어 대퇴부의 분리 절개방법은 내시경 방법이나 장딴지부위의 절개 방법보다 더 빠르고 정맥의 손상이 더 적으며 창상의 합병증도 상대적으로 적어 정맥 이식편의 우수한 수확방법으로 생각된다.