1.Mammaplasty by the periareolar "round block" technique.
Kyeong Sook CHO ; Chin Ho YOON ; Han Joong KIM
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1993;20(5):1064-1071
No abstract available.
Female
;
Mammaplasty*
2.Histologic study of chemical peel in guinea pig after pretreatment with tretinoin and tretinoin-combined pretreatment kit.
Won June YOON ; Heung Sik PARK ; Dong Jin LEE ; Chin Ho YOON ; Han Joong KIM
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1998;25(6):988-996
The purpose of this study was to evaluate the histologic difference that occured after trichloroacetic acid(TCA) chemical peel in an animal model that was pretreated with Tretinoin alone or Tretinoin-based combined pretreatment kit. Eight Hartley white guinea pigs were used in our study. The dorsal skin of the guinea pigs was divided into six equal squares(2x2 cm). Upper two areas of these six were not pretreated, middle two areas were pretreated for 4 weeks with Tretinoin alone and lower two areas were pretreated for 4 weeks with Tretinoin-based combined kit. Each guinea pig underwent chemical peel with 50% TCA. The wounded areas were biopsied at post-peeling 3 weeks and 6 weeks. The histology revealed that those animals pretreated with combined kit healed quicker than the animals pretreated with Tretinoin alone. This study implies that if patients are treated with Tretinoin-based-combined pretreatment kit before undergoing chemical peel, the pretreatment time will be shortened.
Animals
;
Guinea Pigs*
;
Guinea*
;
Humans
;
Models, Animal
;
Skin
;
Tretinoin*
;
Wounds and Injuries
3.Experimental microarterial grafts: glutaraldehyde-tanned microvascular heterografts versus autografts.
Dong Hoon WOO ; Dae Sup KIM ; Chin Ho YOON ; Han Joong KIM ; Hong Mee YOUCK
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1992;19(3):359-364
No abstract available.
Autografts*
;
Heterografts*
;
Transplants*
4.MASTOPEXY AND REDUCTION MAMMOPLASTY THROUGH THE PERIAREOLAR INCISION.
Bae Won BAE ; So Ra KANG ; Heung Sik PARK ; Chin Ho YOON ; Han Joong KIM
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1997;24(5):1145-1152
No abstract available.
Female
;
Mammaplasty*
5.The Effect of Freezing on Acute Damaged Endothelium in Rat Femoral Vein.
Min Wha NA ; Heung Sik PARK ; Chin Ho YOON ; Han Joong KIM
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1999;26(5):1007-1013
In the case of crush injury, the failure rate of replantation of free tissue transfer is high. Recently, the freezing of intact and repaired microarteries has been known to relieve spasm without inducing thrombosis in vivo. Therefore, the author thought that the vascular freezing of crushed vein showing only unrecognized endothelial damage after adequate debridement of a damaged vessel can also relieve spasm without inducing thrombosis and improve the patency rate of microvascular anastomosis. In this study, the process of vascular freezing was investigated in veins with acutely damaged endothelium using ethly chloride in a rat model. Two experiments were performed in 30 Sprague-Dawley rats, weighing about 250 gm. In the first experiment, a new crush model was established on the femoral vein of the rats. The degree of vessel injury was evaluated as crush energy. The proper crush energy was determined only by the endothelial damage without inducing thrombosis(0.037 J). In the second experiment, femoral veins were crushed with the energy of 0.037 J on the left side and then frozen after inflicted crush injury with the same energy on the right side. The gross and pathologic findings and patency rates were observed at postoperative day 2, 10 and 30. Patency in both the crushed and crush-freezing group was 100%. Pathlolgic findings in the crush-freezing group were more severe loss of the intima and most parts of the media, as well as cellular depopulation of the media when compared to the crushed group. Microthrombi adherent to the wall were demonstrated in several crush-freezing specimens, but the crush-freezing group showed relief of crush-induced vasopasm and endothelial regeneration. In conclusion, the freezing of microveins with acute endothelial damage relieves spasm without inducing thrombosis. Therefore, this study presents the posslbility of clinical application of vascular freezing in a case of crush injury requiring microvascualr anastomosis.
Animals
;
Debridement
;
Endothelium*
;
Femoral Vein*
;
Freezing*
;
Models, Animal
;
Rats*
;
Rats, Sprague-Dawley
;
Regeneration
;
Replantation
;
Spasm
;
Thrombosis
;
Veins
6.Dual X-ray Absortiometry(DXA) in the Detection of Loosening in the Total Hip Replacement Arthroplasty' Preliminary Study.
Young Min KIM ; Hee Joong KIM ; Man Chung HAN ; Heung Sik KANG ; Hye Kyung YOON
Journal of the Korean Radiological Society 1994;30(2):369-374
PURPOSE: Algorithms to get cross-sectional bone density pattern(transverse histogram) to predict the loosening of hip prosthesis using DXA(Dual X-ray Absorptiometry) have been developed. We performed this study to analyze the correlation between radiologic findings and densitometric pattern of the THRA(Total Hip Replacement Arthroplasty) patients. MATERIALS AND METHODS: Thirty-six hips of 32 THRA patients were evaluated. The duration between THRA and DXA was from 1 year 7 months to 15 years. On transverse histogram, the periprosthetic bone density patterns were classified as 3 types;type I, rigid fixation in 17, type II, definite loosening in 8, and type III, partial loosening in 11 cases. Surgical findings, plain X-ray findnings and transverse histogram using DXA were correlated. RESULTS: Among 14 cases performing revision for acetabular prosthesis loosening, 5 cases revealed loosening of fernoral stems while 9 cases revealed rigid fixation of femoral stems. Sensitivity was 100% for either plain X-ray or DXA. Specificity was 88%, 77% for plain X-ray and DXA respectively. CONCLUSION: This preliminary study reveals that periprosthetic bone density pattern on transverse histogram on DXA may be useful in the evaluation of the loosening. However, further study will be needed for clinical application.
Acetabulum
;
Arthroplasty, Replacement, Hip*
;
Bone Density
;
Hip
;
Hip Prosthesis
;
Humans
;
Prosthesis Failure
;
Sensitivity and Specificity
7.Comparative study between using co2-laser(ryj-II) and classic method in frenulotomy.
Chin Ho YOON ; You Hwan RHO ; Heung Sik PARK ; Han Joong KIM
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1998;25(8):1475-1479
Tongue-tie is recognized to have adverse influences in sucking and swallowing(infant feeding), growth of jaw, speech, and mechanical movement due to restrictions of tongue mobility. We used CO2-laser(RYJ-II) in frenulotomy of tongue-tie patients with expectations in reducing intraoperative bleeding, postoperative pain and edema. We operated 32cases of the patient group utilizing CO2-laser(RYJ-II) in frenulotomy, 20 cases of the patient group using classic frenulotomy method with scalpel. We compared following variables in two groups: intraoperative bleeding, operation time and postoperative pain and edema. Frenulotomy using CO2-laser(RYJ-II) resulted in reduction in bleeding, postoperative pain and postoperative edema, while reduction in operation time and wound healing time were not confirmed in this study. Authors suggest the ideal suitability of CO2-laser(RYJ-II) in frenulotomy of tongue-tie patients with a brief review of literature.
Edema
;
Hemorrhage
;
Humans
;
Jaw
;
Pain, Postoperative
;
Tongue
;
Wound Healing
8.Radiologic Findings of Bronchiectasis: Tuberculous versus Non-Tuberculous.
Jung Gi IM ; Man Chung HAN ; Kyung Mo YEON ; Joong Mo AHN ; Yong Kyu YOON
Journal of the Korean Radiological Society 1994;31(2):273-277
PURPOSE: To describe the radiological differences between tuberculous(TBB) and non-tuberculous bronchiectasis(NTBB). MATERIALS AND METHODS: Chest radiographs(n=62), bronchograms(n=18), and CT scans(n=52) of 37 patients with TBB and 25 patients with NTBB were reviewed retrospectively. Diagnostic basis for TBB were positive sputum AFB with or without history of anti-tuberculous chemotherapy(n=35), and radiological findings of pulmonary tuberculosis (n=2). Four of NTBB had a history of severe respiratory tract infection in childhood. RESULTS: Air-fluid levels on chest radiographs were seen in 2% of TBB, and 20% of NTBB. On bronchograms, all patients with TBB had combined focal bronchostenosis, whereas patients with NTBB had tubular(50%), cystic(17%), or mixed(33%) pattern of dilatation without stenosis. On CT scans, focal emphysema was seen in 86% of the patients with TBB, and 38% of the patients with NTBB. Peribronchiolar infiltration were seen in 78% and 44% of patients with TBB and NTBB, retrospectively. CONCLUSION: Basic radiological difference between TBB and NTBB was that the former had coexistent sten.
Bronchiectasis*
;
Constriction, Pathologic
;
Dilatation
;
Humans
;
Pulmonary Emphysema
;
Radiography, Thoracic
;
Respiratory Tract Infections
;
Retrospective Studies
;
Sputum
;
Thorax
;
Tomography, X-Ray Computed
;
Tuberculosis, Pulmonary
9.Callosotomy for Intractable Epilepsy in Children.
Joong Uhn CHOI ; Soo Han YOON ; Byung In LEE
Journal of Korean Neurosurgical Society 1992;21(9):1110-1120
Four children with medically refractory multiform seizures were submitted for section of the corpus callosum for last 3 years. These patients had medically intractable generalized seizures diagnosed preoperatively as the Lennox-Gastaut syndrome characterized by a combination of seizure patterns, most frequently drop attack with generalized tonic-clonic, generalized tonic and atonic seizure. Guided by pre- and intra-operative electroencephalographic monitoring, the section was carried out in the anterior 2/3 or 4/5 part of callosum. Five to 28 months' postoperative follow-up suggests good results:Three patient showed no more drop attack except intermittent focal myoclonic seizures in 1 case and one patient had generalized seizures less in frequency than preoperative state. Corpus callosotomy seems to be an effective surgical approach for the intractable epilepsy with drop attack of multifocal origin, but longer follow-up is needed.
Child*
;
Corpus Callosum
;
Electroencephalography
;
Epilepsy*
;
Follow-Up Studies
;
Humans
;
Seizures
;
Syncope
10.A clinical study of donor site care in the split thickness skin graft with thrombin application.
Kang Won LEE ; Hong Mi YOUCK ; Chin Ho YOON ; Han Joong KIM
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1991;18(3):528-532
No abstract available.
Humans
;
Skin*
;
Thrombin*
;
Tissue Donors*
;
Transplants*