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신극선,백태준,이은정,이혜경 大韓成形外科學會 1993 Archives of Plastic Surgery Vol.20 No.1
Although many operative techniques have been developed to approach the parotid a gland, high recurrence rate and the occurrence of facial palsy still remain to be dilema in the parotidectomy. After reviewing 179 cases of parotid tumor retrospectively, including 8cases which utilized the peripheral approach, the authors came to the following conclusions. 1) The sex ratio is 1 : 1 and the mean age of occurrance was 43.1 for benign tumors and 43.4 for malignant tumors. 2) The histopathologic findings showed that 155 cases were benign tumors(86.5%)and 24 cases were malignant tumors(13.5%) 3) Among the benign tumors, the mixed tumor was the most common(126 cases, 81.2%)and in the malignant tumors the mucoepidermoid tumor was the most common(12 cases, 50%). 4) The truncal approach for parotidectomy was used in 171 cases, and the peripheral approach in 8 cases. 5) The peripheral approach is superior to the truncal approach because it can provide with a better surgical field ; the branches of facial nerve can be identified more superficially, and thus the liability of facial nerve injury is much lessened especially in large tumors. The peripheral approach also coincides with the embryologic development of parotid gland.
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합성배지에서 저온성 느타리 (Pleurotus ostreatus 201)의 섬유소 분해요소 생산
이극로 서강정보대학 1999 산업과학연구 Vol.1 No.-
합성배지에서 저온성 느타리( Pleurotus ostreatus 201) 의 섬유소 분해효소 생산에 미치는 질소원. 비타민 및 무기염류의 영향을 검토하였다. 효소 생산에 양호한 질소원은 urea이었고 아질산태질소는 효소생산을 억제하였으며 효소생산에 적당한 urea의 농도는 0.054%이었다. 효소 생산은 folic acid와 thiamine-HCl 에 의해 촉진되었고 KH₂PO₄와 MgSO₄의 최적 농도는 각각 0.2%, 0.04%이었으며 그 밖의 무기염류는 효과가 없었다. Nitrogen sources, vitamins and inorganic salts affecting the productivity of cellulolytic enzymes of pleurotus ostreatus 201 were examined in synthetic medium. Urea was a good nitrogen sources, while nitrite nitrogen depressed the production of enzymes. The appropriate concentration of urea was 0.054% (w/v). The enzymes production was stimulated by folic acid and thiamine-HCl. Among the inorganic salts, optimum concentration of KH₂PO₄, and MgSO₄ were 0.2% (w/v) and 0.04% respectively, but other inorganic salts were not effective on the production of enzymes.
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신극선,탁관철,윤정섭 大韓成形外科學會 1993 Archives of Plastic Surgery Vol.20 No.1
Eighty-three consesutive free-flap transfers were reviewed to analyze distribution of type of reconsturctions, kinds of donor flaps as well incidence of complications. The role of emergent exploration and the effect of preoperative wound conditions in flap survival were evaluate. Free flap transfer for head and neck reconstruciton was most common as 46 cases, followed by for upper extremity of 22cases, for lower extremity 12 cases and for trunk & breast 3 cases. Two patients exhibited within 7 days after the operation because of respiratory complications. Eight flaps exhibited signs of circulatory insufficiency between 5 hours and 7 days. three were managed conservatively with ultimate partial necrosis of the flaps. Five flaps required return to the operating room. On exploration, early arterial occlusion was revealed in 1 flap, late arterial occlusion in 2 flaps, late venous occlusion in 1 flap and hematoma in 1 flap. The average time from the first abnormal examination to exploration was 2.4 hours. There were no false-positive explorations. Two free flaps in which abonormal findings were first noticed 4 days and 7 days after microsurgical transfer respectively failed in spite of the correction of the cause of circulatory compromise. The remaining 3 flaps were salvaged following the correction of the cause. Recipient vessel problems such as irradiation and infection were the most common cause of circulatory crisis. Among the five flaps requiring return to the operating room. single vein was anastomosed in four flaps and two veins in the remaining one. In the totally failed two flaps only songle vein was anastomosed. The results of this study demonstrate the efficacy of clinical monitoring and the role of early exploration. Precautious selection of recipient vessels and two vein anastomosis are recommended for safe and better prognosis.
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신극선,이혜경,이은정 大韓成形外科學會 1990 Archives of Plastic Surgery Vol.17 No.6
The use of tissue expansion in breast reconstruction is one of the recognized alternative surgical approach. In using single lumen prostheric device, which historically has been considered to be a temporary divice,secondary operative procedure is necessarty in oder to remove the expander and replace it with another breast implant. The permanant implant is a reverse double-lumen mammary implant having the sillicon gel as the outer implant and the expander divice at the center. It has the clinical benefit of breast volume control to make symmetricity after operation with observed reduction in pain during expansion,cost savings,elimination of secondary proccedure and anesthetic exposure,high degree of patient acceptance and satisfaction. We experience breast reconstruction using permanant tissue expander in 3 cases of modified radical mstectomy and 1 case of poland's syndrome.
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