1.Effects of Power Output and Energy Density on the Histologic Change of Guinea pig Skin Following Copper Vapor Laser Irradiation.
Woo Seok KOH ; Jin Ho CHUNG ; Jai Il YOUN
Korean Journal of Dermatology 1994;32(4):591-598
BACKGROUND: Recentliy copper vapor laser(CVL) has been applied with encouraging results in the treatment of port wine stain. The CVL emits yellow light(578nm) in a sequence of about 10,000 to 15,000 pulses/second(10-15kHz) with a pulse duration of 15-50 cases. One of the basic methods of evaluationg the effects of laser lights is to study histologic changes after laser irradiation. OBJECTIVE: The effects of power output and energy density on the histologic change of guinea pig skin following CVL irradiation was evaluted to suggest a way of deciding parameters of CVL to achieve the best clinical results. METHODS: After setting the power output for one of 0.8W, 1.6W and 2.4W, the laser was irradiated with an energy density of 10, 12, 14, 16, 18, 20J/cm. A biopsy was done 15 minutes after irradiation and the biopsy specimens was stained with H&E and NBTC histocberr ical method. RESULTS: 1. At the power of 0.8W, specimens irradiated with an energy density above 14J/cm showed diffuse nonspecific coagulation necrosis of the epidermis and upper dermis. 2. At the power of 1.6W, specimens irradiated with energy density of 14, 16J/cm showed coagulation necrosis of dermal vessel and perivascular collagen. With energe density of 18, 20J/cm, diffuse nonspecific coagulat,ion necrosis of epidermis and upper dermis were observed. 3. At the power of 2.4W, specimens irradiated with an anergy density of 12, 14, 16, 18J/cm showed coagulation necrosis of the dermal vessel and perivascular collagen. With an energy density of 20J/cm, diffuse nonspecific coagulation necrosis of the epidermis and upper dermis was observed. CONCLUSIONS : With the above results it was found that t,he higher power output of CVL enlarged the range of energy density confining thermal damage to the dermal v-ssels and perivascular collagen. Additionally the higher power raised the upper limit of energy density with which t,he epidermis was viable.
Animals
;
Biopsy
;
Collagen
;
Copper*
;
Dermis
;
Epidermis
;
Guinea Pigs*
;
Guinea*
;
Herpes Zoster
;
Humans
;
Inpatients
;
Lasers, Gas*
;
Necrosis
;
Port-Wine Stain
;
Skin*
2.Effects of Power Output and Energy Density on the Histologic Change of Guinea pig Skin Following Copper Vapor Laser Irradiation.
Woo Seok KOH ; Jin Ho CHUNG ; Jai Il YOUN
Korean Journal of Dermatology 1994;32(4):591-598
BACKGROUND: Recentliy copper vapor laser(CVL) has been applied with encouraging results in the treatment of port wine stain. The CVL emits yellow light(578nm) in a sequence of about 10,000 to 15,000 pulses/second(10-15kHz) with a pulse duration of 15-50 cases. One of the basic methods of evaluationg the effects of laser lights is to study histologic changes after laser irradiation. OBJECTIVE: The effects of power output and energy density on the histologic change of guinea pig skin following CVL irradiation was evaluted to suggest a way of deciding parameters of CVL to achieve the best clinical results. METHODS: After setting the power output for one of 0.8W, 1.6W and 2.4W, the laser was irradiated with an energy density of 10, 12, 14, 16, 18, 20J/cm. A biopsy was done 15 minutes after irradiation and the biopsy specimens was stained with H&E and NBTC histocberr ical method. RESULTS: 1. At the power of 0.8W, specimens irradiated with an energy density above 14J/cm showed diffuse nonspecific coagulation necrosis of the epidermis and upper dermis. 2. At the power of 1.6W, specimens irradiated with energy density of 14, 16J/cm showed coagulation necrosis of dermal vessel and perivascular collagen. With energe density of 18, 20J/cm, diffuse nonspecific coagulat,ion necrosis of epidermis and upper dermis were observed. 3. At the power of 2.4W, specimens irradiated with an anergy density of 12, 14, 16, 18J/cm showed coagulation necrosis of the dermal vessel and perivascular collagen. With an energy density of 20J/cm, diffuse nonspecific coagulation necrosis of the epidermis and upper dermis was observed. CONCLUSIONS : With the above results it was found that t,he higher power output of CVL enlarged the range of energy density confining thermal damage to the dermal v-ssels and perivascular collagen. Additionally the higher power raised the upper limit of energy density with which t,he epidermis was viable.
Animals
;
Biopsy
;
Collagen
;
Copper*
;
Dermis
;
Epidermis
;
Guinea Pigs*
;
Guinea*
;
Herpes Zoster
;
Humans
;
Inpatients
;
Lasers, Gas*
;
Necrosis
;
Port-Wine Stain
;
Skin*
3.UVB Induced Minimal Erythema Dose ( MED ) and Minimal Melanogenic Dose ( MMD ) in Young Adult Koreans.
Woo Seok KOH ; Jin Ho CHUNG ; Jai Il YOUN ; Young Woo SHIN
Korean Journal of Dermatology 1994;32(2):253-257
BACKGROUND: The erythemal response and delayed tanning of the skin to UV radiations which are used as diagnostic phototest and guideline of phototherapy are different according to the races and light sources. OBJECTIVE: The MED and MMD induced by UVB radiation were measured in 130 normal young adult Koreans. METHODS: In this study, a high pressure mercury are lamp(Burdick UV-800) and a sunlight fluorescent lamp(Waldmann UV 800) were used as UVB light sources. Multiple sites of the lower baek or buttock skin were irradiated with an increasing dose by a constant, anount. The minimal doses of erythema response and delayed tanning of the skin were assessed visaually at 24 hours and 7 days after irradiation, respectively. RESULTS: MED and MMD of Burdick UV-800 are 18.0+/-9.8mJ/cm2 (mean+/-S.D.), 29.7+/-12.5mJ/cm2, respectively. MED and MMD of Waldmann UV 800 are 70.8+/-28.5mJ/cm2 and 91.2+/-33.1mJ/cm2, respecively. The most frequent MED by Burdick UV-800 is 10mJ/cm2 and those by Waldmann UV 800 are 50m J/cm2 and 60m J/cm2. CONCLUSION: In this study MED and MMD of young adult Koreans by two kinds of UVB light sources were assessed. The RESULTS: how that MED is less than MMD and the levels of MED under which the photosensitivity is suggested are 5.6mJ/cm2 by Burdick UV-800 anr 32.4mJ/cm2 by Waldmann UV 800.
Buttocks
;
Continental Population Groups
;
Erythema*
;
Humans
;
Phototherapy
;
Skin
;
Sunlight
;
Tanning
;
Triacetoneamine-N-Oxyl
;
Young Adult*
4.A Case of Mllerian adenosarcoma of vaginal stump after total abdominal hysterectomy.
Kyung Hee LEE ; Eun Mi KOH ; Man Chul PARK ; Yong Woo LEE ; Jin Hee SOHN
Korean Journal of Obstetrics and Gynecology 2000;43(6):1109-1113
Mllerian adenosarcoma of uterus usually present as pedunculated endometrial masses in postmenopausal women with vaginal bleeding. Extraendometrial variants are much less common. A 50-year-old woman, after total abdominal hysterectomy with bilateral salpingo-oophorectomy due to adenomyosis and benign ovarian mass, presented with protruding mass through vagina. The mass, originated from vaginal stump, was diagnosed as Mllerian adenosarcoma. We report a case of extrauterine Mllerian adenosarcoma with a review of literatures.
Adenomyosis
;
Adenosarcoma*
;
Female
;
Humans
;
Hysterectomy*
;
Middle Aged
;
Uterine Hemorrhage
;
Uterus
;
Vagina
5.A case of acute intermittent porphyria in pregnancy.
Woo Hyun CHANG ; Hyun Soo CHUNG ; Jong Woo SOHN ; Young Ho KOH ; Jin Ki HONG ; Byung Hee SUH
Korean Journal of Obstetrics and Gynecology 1993;36(7):2435-2440
No abstract available.
Porphyria, Acute Intermittent*
;
Pregnancy*
6.Lyophilized allogeneic costal cartilage graft for septorhinoplasty
Jin Sup EOM ; Dong Jin KIM ; Jin Woo SONG ; Jong Woo CHOI ; Kyung Suck KOH
Archives of Aesthetic Plastic Surgery 2023;29(4):190-194
Background:
As rhinoplasty techniques have become more complex, surgeons often need more than what septal or conchal cartilage can provide. While costal cartilage became more popular for that reason, some surgeons are still uncomfortable with its invasiveness and donor site morbidity. Here, we used lyophilized allogeneic costal cartilage for septorhinoplasty and investigated its safety and usefulness.
Methods:
The costal cartilage was harvested from a cadaveric donor and treated via multiple steps, including defatting and lyophilization, to remove all viable cells and antigenicity. The cartilage was then stored at room temperature and rehydrated 24 hours before use. Lyophilized cartilage allografts were used in 20 patients. Three types of septal graft were performed — spreader, batten, and extension — to correct septal or columellar deviation and enhance the nasal tip.
Results:
The mean follow-up period was 4.3 years. In all cases, the graft successfully met the rhinoplasty purpose. No significant deformation was detected in any of the patients. Although warping was observed in one patient (5%), there was no case of clinical infection, extrusion, or graft removal and no revisional surgery for an unfavorable aesthetic result.
Conclusions
Lyophilized allogeneic cartilage was used for septorhinoplasty very safely and effectively. It can be carved into any shape and has all other properties required for perfectly replacing autologous costal cartilage. The main advantage of cartilage allografts is a limitless supply of high-quality cartilage without donor site morbidity. The disadvantages include the need for special facilities and manpower and extra covering cost.
7.Reevaluation of the thyroid scan for the assessment of pathophysiologic status of thyroid disease.
In Sook WOO ; Jung Il NAH ; Deog Yoon KIM ; Eun Mi KOH ; Sung Woon KIM ; In Myung YANG ; Jin Woo KIM ; Young Seol KIM ; Kwang Woo KIM ; Young Kil CHOI
Korean Journal of Nuclear Medicine 1991;25(1):101-109
No abstract available.
Thyroid Diseases*
;
Thyroid Gland*
8.Reevaluation of the thyroid scan for the assessment of pathophysiologic status of thyroid disease.
In Sook WOO ; Jung Il NAH ; Deog Yoon KIM ; Eun Mi KOH ; Sung Woon KIM ; In Myung YANG ; Jin Woo KIM ; Young Seol KIM ; Kwang Woo KIM ; Young Kil CHOI
Korean Journal of Nuclear Medicine 1991;25(1):101-109
No abstract available.
Thyroid Diseases*
;
Thyroid Gland*
9.Thallium-201 perfusion scan in peripheral arterial disease.
Jung Il NAH ; In Sook WOO ; Deog Yoon KIM ; Eun Mi KOH ; Jin Woo KIM ; Young Seol KIM ; Kwang Woo KIM ; Young Kil CHOI
Korean Journal of Nuclear Medicine 1991;25(2):192-199
No abstract available.
Perfusion*
;
Peripheral Arterial Disease*
10.Traumatic Pericallosal Artery Aneurysm.
Won Chul WOO ; Shi Hun SONG ; Nyeon Song KOH ; Jin Young YEOM ; Seng Ho KIM ; Youn KIM
Journal of Korean Neurosurgical Society 2000;29(2):265-269