• Archives of Reconstructive Microsurgery
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• 제17권1호
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• pp.1-6
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• 2008

Medial gastrocnemius flap has been known as a useful option for soft tissue reconstruction of the knee and upper 1/3 of lower extremity, but it has a limitation to cover the lateral defect of the knee joint. We performed the combined gastrocnemius-medial sural artery perforator flap for coverage of the anterolateral defects of the knee joint, which is compound flap using a medial gastrocnemius flap and a medial sural artery perforator flap. This flap is a useful method for reconstruction of anterolateral knee defects, providing a easy dissection without the microsurgery and intramuscular dissection of the perforators.

• Archives of Plastic Surgery
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• 제36권5호
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• pp.597-604
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• 2009

Purpose: Compound tissue defects remain a challenge to reconstructive surgeons. The objective of this study was to introduce examples of successful reconstruction of compound defects of the head and neck and upper and lower limbs, using chimeric flaps based on the subscapular vascular system. Methods: We report 19 reconstruction cases using chimeric flaps based on the subscapular vascular system. The scapular flap, scapular fascia, scapular bone, parascapular flap, latissimus dorsi, latissimus dorsi perforator flap, latissimus dorsi myocutaneous perforator flap, serratus anterior, serratus anterior fascia, and rib bone were used as components for chimeric flaps. 12 cases had defects of the upper limb, three in the lower limb, three in the head and neck area, and one case had a defect of the thoracoabdominal wall. Results: Defect sizes ranged from $6{\times}8cm$ to $20{\times}22cm$. The component used most often for skin coverage was the latissimus dorsi perforator flap; for soft tissue bulk, the latissimus dorsi; for fascia coverage, the serratus anterior fascia flap; and for bone reconstruction, the scapular bone flap respectively. All cases were successfully reconstructed without additional operative procedures or flap necrosis. Conclusion: Because it is fairly easy to employ vascular pedicles of sufficient length and diameter, enabling the use of diverse types of tissue with various shapes and sizes, the use of chimeric flaps based on the subscapular vascular system allows one - stage reconstruction tailored to the characteristics of the defect area.

• Archives of Reconstructive Microsurgery
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• 제4권1호
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• pp.33-42
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• 1995

Frequently, a single muscle flap is not enough to cover a large compound defects after extensive trauma or ablation of tumor. For a extensive defects, several kinds of flaps are available for various needs of reconstruction. The combined latissimus dorsi and serratus anterior flaps provide the largest possible soft tissue coverage. Two flaps composed of latissimus dorsi and serratus anterior muscles are consistently nourished through the subscapular-thoracodorsal vessels and their many branches, and thus the two flaps can be isolated with one vascular pedicled free flap. We experienced 4 cases of reconstruction in closure of extensive compound defects using the combined latissimus dorsi and serratus anterior muscles with one vascular pedicled free flap. The advantages of using these flaps are : 1) its versatlity and excellent malleability 2) easy to dissection 3) long-stalked pedicle 4) the use of a vascularized rib 5) negligible motor dysfunction from the muscle removal.

• Archives of Plastic Surgery
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• 제33권2호
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• pp.263-267
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• 2006

In both cosmetic and functional aspects, loss of digital pulp is a common problem. Compound or composite defects of the hand and fingers with exposed denuded tendon, bone, joint, or neurovascular structures may require flap coverage. Most often these lesions can be repaired by using simple local flap, neurovascular flap, thenar flap, and cross-finger flap. But microvascular reconstruction is sometimes needed for large defects. But Authors do not recommend these procedures in case of severe crushing injuries involving multiple finger pulp losses because they have possibility of damage of the vascular network and infection. So we applied distant flaps such as chest flaps, groin flaps, abdominal flaps and etc. And then we applied surgical rubber gloves for remodeling the flap after cutaneous healing. We have acquired satisfactory results, after the simple molding method for distant flap finger by using surgical rubber gloves treatment.

• Archives of Reconstructive Microsurgery
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• 제16권2호
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• pp.68-74
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• 2007

Soft-tissue reconstruction of the foot and ankle has long been a challenge for reconstructive surgeons. Limitations in the available local tissue and donor-site morbidity restrict the options. In an effort to solve these difficult problems, the authors have begun to use a subcutaneous fascial pedicled lateral supramalleolar flap. This report presents the authors' experience with five patients treated with this flap. The patients’ ages ranged from 26 to 72 years; four of the patients were male and one was female. The cause of the soft-tissue defects involved acute trauma and malignant melanom. All flaps survived and provided satisfactory coverage of the defect. Compared with the classic lateral supramalleolar flap, when the perforating branch is interrupted in its course, it is possible to elevate this subcutaneous fascial pedicled flap. The distally based flap with a compound pedicle which is continuous with a vascular axis and a band of subcutaneous fascial pedicle has long pedicle. This procedure is valuable for remote defect of the foot. It is believed that this flap is versatile and effective and is a good addition to the available techniques used by reconstructive surgeons for coverage of the foot and ankle.

• 복식
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• 제50권7호
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• pp.129-139
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• 2000

The Chonmachong (Tumulus No. 155 in Whangnam-dong, Kyungju, Korea), which was unearthed in 1973, is an ancient tomb built in the Shilla Era between the 5th∼6th centuries by the method of Juk-suk-mok-gwak. With the excavation of this tomb more than 11,500 articles of luxurious and splendid relics including gold and silver ornaments, weaponry and horse gears were obtained. Among the excavated articles, the saddle flap with a drawing of flying horse on it is the first relic of its kind from the Shilla Era. and 'Chonma'(a flying horse), the name of the tomb. was named after this drawing. The saddle flap is highly valuable in that it provides the idea of how goad the people of Shilla were at drawing. Although a lot of researches have been released about the relics from the Chonmachong, this study is to focus on the fabrics from the excavation, all of which are in the Kyongiu Museum's collection. The findings of this study are as follows : 1 The subject of this study is mainly on the fabrics used in horse gears, the pieces of cloth that were used to spread on a saddle or to underlay beneath a saddle. As the Shilla Dynasty tried to restrict excessive ornamentation on horses and it is assumed that the fabrics used are different. according to the social status. 2. The subject articles are four plain fabrics, three fabrics of combined -construction and one braid, the warp-faced compound woven silks of combined-construction was found for the first tinge in Korea, and is the typical quality sick with patterns woven with dyed threads in different colors. 3. It is ascertained by the Chonmachong excavation that polychrome woven silk was used not only for the clothes of the upper classes but also for the ornaments of their horses in the Era of the Three Kingdoms.

• 항공우주시스템공학회지
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• 제12권2호
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• pp.30-36
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• 2018

본 연구에서는 무인복합형 회전익기 연구의 일환으로 축소형 Tip Jet 로터 시험장치를 개발하였으며, 이를 이용하여 Tip Jet 로터에 대한 성능 및 동특성 연구를 수행하였다. 축소로터는 시험장 여건 및 공압조건 등을 고려하여 2m급이 되도록 하였으며, 압축공기를 이용하여 구동된다. 축소로터의 회전속도는 압축공기의 압력을 이용하여 조절되며, 별도의 하중측정부를 두어 회전 시 발생하는 추력과 각 방향의 하중 데이터를 획득하게 된다. 동특성 시험을 위해 별도의 유압 가진기가 장착되어 있으며, 로터 가진 시 발생하는 블레이드의 flap, lag 및 torsion 방향에 대한 동적 응답을 확인하기 위해, 각 블레이드의 익근부에는 full-bridge strain gage를 부착하였다. 성능 및 동특성 시험은 로터 회전수 및 블레이드 피치각을 변경해가며 실시되었다. 아울러 시험 결과의 유효성을 확인하기 위해 CAMRAD II 해석 결과와 비교하였다.

• Journal of Korean Neurosurgical Society
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• 제60권4호
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• pp.397-403
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• 2017

Objective : Cranioplasty using a cryopreserved skull flap is a wide spread practice. The most well-known complications of cranioplasty are postoperative surgical infections and bone flap resorption. In order to find biological evidence of cryopreserved cranioplasty, we investigated microorganism contamination of cryopreserved skulls and cultured osteoblasts from cryopreserved skulls. Methods : Cryopreserved skull flaps of expired patients stored in a bone bank were used. Cryopreserved skulls were packaged in a plastic bag and wrapped with cotton cloth twice. After being crushed by a hammer, cancellous bone between the inner and outer table was obtained. The cancellous bone chips were thawed in a water bath of $30^{\circ}C$ rapidly. After this, osteoblast culture and general microorganism culture were executed. Osteoblast cultures were done for 3 weeks. Microorganism cultures were done for 72 hours. Results : A total of 47 cryopreserved skull flaps obtained from craniectomy was enrolled. Of the sample, 11 people were women, and the average age of patients was 55.8 years. Twenty four people had traumatic brain injuries, and 23 people had vascular diseases. Among the patients with traumatic brain injuries, two had fracture compound comminuted depressed. The duration of cryopreservation was, on average, 83.2 months (9 to 161 months). No cultured osteoblast was observed. No microorganisms were cultured. Conclusion : In this study, neither microorganisms nor osteoblasts were cultured. The biological validity of cryopreserved skulls cranioplasty was considered low. However, the usage of cryopreserved skulls for cranioplasty is worthy of further investigation in the aspect of cost-effectiveness and risk-benefit of post-cranioplasty infection.

• Journal of Periodontal and Implant Science
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• 제34권2호
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• pp.449-459
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• 2004

Bacterial byproducts and volatile sulfur compounds(VSC) have been found to be the leading intra-oral agents, specifically, the byproducts of gram negative anaerobic bacteria have been implicated as primary factors of halitosis in patients presenting with periodontal disease. The objective of this study was to determine the correlation between periodontal treatment and the subsequent reduction in the level of halitosis. Forty-three subjects presenting with periodontal disease were examined before periodontal treatment, one week after treatment, one month after treatment, and finally, two months after treatment, using a portable sulfide monitoring $Halimeter^{(R)}$ to measure the VSC concentrations at the prescribed intervals. The results of the study were as follows: 1. Significant decreases in the mean VSC concentration were observed at the one week, one month, and two month post-op intervals relative to the pre-op measurement. (p<0.05) 2. Significant decreases in the mean VSC concentration were observed in subjects after completion of flap operations. Significant decreases in the mean VSC concentration were observed at the one and two month post-flap operation measurement relative to the VSC concentration at one week (p<0.05), but no significant differences between the one month and two month VSC concentrations were found. (p<0.05) 3. Significant decreases in the mean VSC concentration were observed in subjects after completion of subgingival curettage (p<0,05). Significant decreases were found between the one week and one month measurements and between the one month and two month measurements, but significant differences were not observed between the one week and two month measurements. (p<0.05) The results of this study show significant decreases in VSC concentration in test subjects after periodontal treatment. It can be inferred from the results above, that periodontal disease is a significant contributing factor of halitosis, and that treatment of periodontal disease can been an effective means of reducing VSC concentration in patients presenting with halitosis concurrent with periodontal disease.

• 한국수산과학회지
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• 제41권2호
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• pp.119-124
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• 2008

Reproductive ecology of the snow crab Chionoecetes opilio was investigated in terms of the reproductive organs, abdominal flap, fecundity, and maturity. Specimens were collected with gill nets and trawls from June 2002 to May 2003 in the eastern waters of Korea. The female and male C. opilio are distinguished only by the shape of the abdominal flap, which is triangular in males and circular in females. The gonads of female and male crabs are generally X-shaped. The male gonad is white, while the female gonad appears milk-white after spawning and then turns from light orange to dark orange with maturation. The female gonads matured from June, and mature and immature groups could be distinguished from December to February or March. Brooding eggs changed from bright orange to dark brown with formation of the compound eye immediately before hatching. Accordingly, the main spawning season is February and March. The minimum maturity carapace width of female crabs was 61.1 mm, and the mean fecundity is about 108,300 eggs.