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Congenital Epidermoid Cyst of the Oral Cavity: Prenatal Diagnosis by Sonography
박승완,이정주,채수안,유병훈,김광준,이세영 대한이비인후과학회 2013 Clinical and Experimental Otorhinolaryngology Vol.6 No.3
Epidermoid cysts are benign developmental anomalies that are rarely observed in the oral cavity of neonate. If large in size,especially in the developing fetus or newborn infant, they can cause swallowing difficulty and occasionally respiratory difficulty. We report a case of epidermoid cyst in the oral cavity detected prenatal sonography. The sonographic finding was large cystic mass, measuring 30×25 mm. In this case, supplies and equipment for an emergency tracheostomy were made available prior to the delivery. However, the infant did not require intervention to secure the airway. The lesion was surgically excised, and histologic diagnosis was epidermoid cyst. After 6 months of follow up, the cyst had not recurred. This case illustrates the value of accurate prenatal diagnosis and planned perinatal management using a team approach.
Unilateral Pes Cavus as an lnitial Sign of Tethered Cord Syndrome in an Adolescent: A Case Report
박승완,문정보,류병주 대한근전도전기진단의학회 2018 대한근전도 전기진단의학회지 Vol.20 No.2
A 14-year-old student presented with a 2-year history of progressive left foot deformity. High elevated medial arch, hindfoot varus deformity and second to fourth claw toes were idenfied in the left foot without a familial history. Neurologic examinations showed left distal lower extremity weakness and bilateral increased deep tendon reflexes. MRI of whole spine demonstrated thickened filum terminale and spinal defect covered with pulled skin which findings consistent with tethered cord syndrome (TCS). He was referred to neurosurgery department and had a detethering operation of the spinal cord. Two years later, he underwent foot surgery because his foot deformity progressed despite the detethering operation. It is very rare for TCS to present with pes cavus as the only symptom, also in Korea. We suggest that TCS should be considered as one of the differential diagnoses associated with unilateral pes cavus in adolescence so as not to miss the proper period of surgery.
박승완,김남규 대한의학회 2015 Journal of Korean medical science Vol.30 No.7
The conventional laparoscopic approach to rectal surgery has several limitations, and therefore many colorectal surgeons have great expectations for the robotic surgical system as an alternative modality in overcoming challenges of laparoscopic surgery and thus enhancing oncologic and functional outcomes. This review explores the possibility of robotic surgery as an alternative approach in laparoscopic surgery for rectal cancer. The da Vinci® Surgical System was developed specifically to compensate for the technical limitations of laparoscopic instruments in rectal surgery. The robotic rectal surgery is associated with comparable or better oncologic and pathologic outcomes, as well as low morbidity and mortality. The robotic surgery is generally easier to learn than laparoscopic surgery, improving the probability of autonomic nerve preservation and genitourinary function recovery. Furthermore, in very complex procedures such as intersphincteric dissections and transabdominal transections of the levator muscle, the robotic approach is associated with increased performance and safety compared to laparoscopic surgery. The robotic surgery for rectal cancer is an advanced technique that may resolve the issues associated with laparoscopic surgery. However, high cost of robotic surgery must be addressed before it can become the new standard treatment.
항중성구세포질항체 연관 혈관염에서 망막중심동맥 폐쇄, 급속진행토리콩팥염이 동반된 말초 다발신경병증: 증례보고
박승완,류병주,문정보,곽호준,김윤희 대한근전도전기진단의학회 2018 대한근전도 전기진단의학회지 Vol.20 No.1
We report a case of asymmetric polyneuropathy with left central retinal artery occlusion, rapid progressive glomerulonephritis (RPGN) due to Antineutrophil cytoplasmic antibody (ANCA) associated vasculitis (AAV). A-64-year-old man started to have numbness and weakness in both legs. One month later, he suddenly lost a vision in his left eye and had swelling in both legs. Thereafter, weakness progressed to both upper extremities. Multiple eye retinal hemorrhages and cherry-red spots were observed on fundus examination and were diagnosed as central retinal artery occlusion. Pauci-immune crescentic glomerulonephritis were identified after renal biopsy. Nerve conduction study was performed and the patient was diagnosed by peripheral polyneuropathy involving both upper and lower extremities. Clinically, we diagnosed a vasculitis, especially microscopic polyangiitis (MPA).
박승완,정재동 대구대학교 산업기술연구소 2008 産業技術硏究 Vol.19 No.-
The objective of this study is to investigate the degree of surface-glossing of cement mortar with kinds of compounds, contents and forms. According to the test results, degree of surface-glossing of cement mortar using High-effectiveness water-reducing agent is higher that no add High-effectiveness water-reducing agent. In mixing proportions, cement mortar made by mix proportion of 1:1(cement : sand) has the highest degree of surface-glossing. In case of surface-with the kind of the form made of acryl has the best performance among the form kinds tested in this experiment. Also, surface glossing-glossing get worse with the elapse of age.
진동 파ㆍ분쇄기를 이용한 고품질 순환골재 생산기술의 개발에 관한 연구
박승완,조현대,김성수,김성수 대구대학교 산업기술연구소 2009 産業技術硏究 Vol.20 No.1
Skyscrapers and mass housings which built in the time of high economic growth since economic development are renovated as deterioration. And amounts of construction wastes are increasing constantly by demanding new constructions to supply mass housing as well. Hereupon, but construction wastes are being recycled more than 80%, recycle is not enough by the problems on quality of aggregates or user's miss understanding. Due to absent from a core technology, vibrate crusher, or other technology in middle treatment process, people are using inefficient equipments. This caused energy waste, producing efficiency decrease, a falling off in quality and production cost rising etc. Therefore, a purpose on this project is to reduce in a social, environmental and technical charge, and improve a producing technology of high quality cycle aggregates with economical efficiency, productivity and environmental effect from middle treatment process.
박승완,허혁,민병소,김남규 대한대장항문학회 2016 Annals of Coloproctolgy Vol.32 No.1
Purpose: This study compared the perioperative and pathologic outcomes between an extralevator abdominoperineal resection (APR) in the prone position and a conventional APR. Methods: Between September 2011 and March 2014, an extralevator APR in the prone position was performed on 13 patients with rectal cancer and a conventional APR on 26 such patients. Patients’ demographics and perioperative and pathologic outcomes were obtained from the colorectal cancer database and electronic medical charts. Results: Age and preoperative carcinoembryonic antigen (CEA) level were significantly different between the conventional and the extralevator APR in the prone position (median age, 65 years vs. 55 years [P = 0.001]; median preoperative CEA level, 4.94 ng/mL vs. 1.81 ng/mL [P = 0.011]). For perioperative outcomes, 1 (3.8%) intraoperative bowel perforation occurred in the conventional APR group and 2 (15.3%) in the extralevator APR group. In the conventional and extralevator APR groups, 12 (46.2%) and 6 patients (46.2%) had postoperative complications, and 8 (66.7%) and 2 patients (33.4%) had major complications (Clavien-Dindo III/IV), respectively. The circumferential resection margin involvement rate was higher in the extralevator APR group compared with the conventional APR group (3 of 13 [23.1%] vs. 3 of 26 [11.5%]). Conclusion: The extralevator APR in the prone position for patients with advanced low rectal cancer has no advantages in perioperative and pathologic outcomes over a conventional APR for such patients. However, through early experience with a new surgical technique, we identified various reasons for the lack of favorable outcomes and expect sufficient experience to produce better peri- or postoperative outcomes.