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변형된 Round Block Technique을 이용한 유방 축소술
이윤호,이석준 대한성형외과학회 2002 Archives of Plastic Surgery Vol.29 No.4
The goals of reduction mammoplasty are to remove the appropriate amount of breast tissue and to make the nice cone-shaped breast. For these goals, various methods have been used and newly introduced. Recently, as women's interest in cosmetic attractiveness increases, surgeons make attempts to minimize postoperative scars. Periareolar approach has an advantage of invisible postoperative scar, but has many disadvantages - flattening of breast shape, recurrence of breast ptosis, hypertrophy and widening of periareolar scar, enlargement and distortion of areola caused by tension. After Benelli introduced Round block technique, this approach became one of the most popular methods. The characteristics of Round block technique are periareolar approach, superiorly based dermoglandular pedicle, criss-cross mastopexy, and Round block suture. Authors modified periareolar Round block technique to adjust to Korean women and have operated on 11 patients since 1997. We focused on medializing the lateral portion of inframammary fold and avoiding asymmetry and protrusion of nipple-areolar complex. Round block suture with uniform thickness and length must be applied at the same time to prevent areolar complications. In design, authors referred to the statistical analysis on Korean female. The results are aesthetically and functionally satisfactory and there has been no significant complication. In conclusion, this method is effective for young woman or mild macromastia with moderate ptosis. Besides, an accurate understanding of each step of operative procedure and enough knowledge of anatomy and physiology of the breast are essential.
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협부 종양에 동반된 구각의 처짐 교정을 위한 비순주름 부위 진피피판을 이용한 현수 고정
이윤호,노종훈,최순우 대한성형외과학회 2002 Archives of Plastic Surgery Vol.29 No.5
Benign tumor in the cheek area such as hemangioma, lymphangioma and neurofibroma causes the drooping of affected side soft tissue involving cheek, mouth corner and nasolabial fold due to its heavy weight and bulkiness. The drooping of mouth corner may remain even after partial subcutaneous excision of the mass. The authors suspended the drooped mouth corner with dermal flap which could be elevated through the nasolabial fusiform de-epithelization simultaneously while the mass was removed by the incision. A total of 14 patients with hemangioma, lymphangioma and neurofibroma in the cheek area were operated between February 1998 and November 2001. The age distribution was 5 to 21-years-old and the follow-up period ranged from 5 to 37 months. There were 1 case of epidermal inclusion cyst and 1 case of hematoma, but no infection or facial nerve palsy was reported as complication. The aesthetic results were considered favorable. This technique prevents the drooping of mouth corner or asymmetry of mid-face without remaining any significant deformity at the donor site, and helps to make more normalized facial feature after the removal of soft tissue mass in the cheek.
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두개저를 통한 두개안면골 성형술후 생긴 비-전두간 교통의 차단법
이윤호,김우정 대한성형외과학회 2002 Archives of Plastic Surgery Vol.29 No.3
Craniofacial surgery for facial advancement or correction of severe craniofacial malformations such as orbital hypertelorism, Crouzon's disease and Apert's syndrome may bring about great risk. Especially postoperative infection in the craniofacial surgery is a life threatening complication. Ascending infection via nasofrontal communication in frontofacial monobloc advancement, intracranial Le Fort III osteotomy, correction of hypertelorism(intracranial approach) and acute trauma of cribriform plate can lead to life threatening meningitis and meningoencephalitis. A 4 layer sealing technique for the closure of nasofrontal communication using Gelfoam??, the inferiorly based, galeo-pericranial flap, rib bone graft, Tissel?? is a very effective method. Until the rib bone graft is completely uptaken, Gelfoam?? is used as a temporary blockage of bony defect and prevents displacement of rib bone graft. We used galeo-periosteal flap for the sufficient blood supply to the rib bone graft. And Tissel?? is used as a biologic adhesive and blockage of the surrounding gaps.
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이윤호,최중혁 대한성형외과학회 2003 Archives of Plastic Surgery Vol.30 No.4
Prominent ear means congenital ear anomaly which has the obtuse conchoscapal angle caused by underdeveloped antihelix and has the larger concha shape than normal. It can be corrected by non-surgical method such as molding process with splint when ear cartilage keep flexibility right after birth and by surgical method with manipulating the ear cartilage directly. To correct prominent ear, we used simple and effective technique consisted of (1)anterior cartilage surface scoring and (2)two horizontal mattress suture without skin excision because we have the opinion that the most important deformity in prominent ear is lesser projection of antihelical fold. From March 1998 to February 2003 this method was applied to 12 patients. During the follow-up period no particular side effects were detected and we had an excellent aesthetic result.
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Optimal ultrasonic cleaning conditions for regeneration of separation membranes
이윤호,이병대 한국응용과학기술학회 2024 한국응용과학기술학회지 Vol.41 No.6
In this study, ultrasonic waves were combined with chemical cleaning to regenerate expensive membranes or solid filters. Nitric acid cleaning alone achieved a flux recovery rate of 68%, but when ultrasonic waves were applied simultaneously, the rate increased to 91%. Similarly, cleaning with HYDREX 4710, a membrane detergent, achieved a flux recovery rate of 76%, which improved to 95% when combined with ultrasonic waves. The operational lifespan of the membranes increased by 125 hours when ultrasonic waves were used in conjunction with cleaning agents compared to using an organic detergent alone. SEM and EDX analyses of unused membranes and membranes prior to chemical cleaning revealed significant adsorption of both organic and inorganic substances, such as aluminum (Al) and silicon (Si). These findings demonstrate that combining chemical cleaning with ultrasonic waves is a highly efficient method for membrane regeneration.
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