1.Multiple primary lung cancer: A case report.
Young Han YOON ; Doo Yeon LEE ; Ki Beom LEE
The Korean Journal of Thoracic and Cardiovascular Surgery 1993;26(9):722-725
No abstract available.
Lung Neoplasms*
;
Lung*
2.Videothoracoscopic operation.
Hae Kyoon KIM ; Doo Yun LEE ; Yong Han YOON ; Ki Man BAE
The Korean Journal of Thoracic and Cardiovascular Surgery 1993;26(2):86-88
No abstract available.
3.Effects of Female Hormones and Menstrual Cycle on Female Relaxed G-Tolerance.
Sang Ho HWANG ; Ki Young CHUNG ; Han Doo YOON
Korean Journal of Aerospace and Environmental Medicine 2005;15(1):1-5
BACKGROUND: With increasing number of female pilots who fly high-performance aircraft, the gender specific factors have become one of the most important aeromedical considerations. It has been raised that the changes of serum female hormone levels by menstrual cycle may affect vasoregulation and female G-tolerance ultimately. However, the exact relationship between serum female hormone levels and G-tolerance is still unknown. Moreover, well-controlled subjects without taking oral contraceptives are needed to examine the possible effect of menstrual cycle on female G-tolerance. The purpose of this study was to determine how female hormones and menstrual cycle affect female relaxed G-tolerance. METHODS: Eight female subjects were studied to test their relaxed G-tolerance. Seven out of 8 subjects had regular menstrual cycle during the study period. Each subject were exposed to human centrifuge once a week for 4 weeks (one complete menstrual cycle) and blood samplings were performed twice at 2nd and 4th week just before exposure to human centrifuge. The profile of centrifuge training consisted of gradual-onset run (0.1 G/sec) acceleration to the visual endpoint. RESULTS: The changes of 4 different serum female hormone levels failed to show any trend related to relaxed G-tolerance including estrogen. There was no significant difference in relaxed G-tolerance in any menstrual cycle time points. CONCLUSION: We conclude that the changes of female hormone levels and the menstrual cycle have no effect on female relaxed G-tolerance.
Acceleration
;
Aircraft
;
Contraceptives, Oral
;
Diptera
;
Estrogens
;
Female*
;
Humans
;
Menstrual Cycle*
4.Clinical experience of cartilage allograft.
Kyung Suck KOH ; Doo Young OH ; Jeong Hoon KANG ; Sang Hoor HAN ; Kun Chul YOON
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1998;25(4):573-580
Bony defect is one of the most common problems in craniomaxillofacial surgery. Although aurogenous bone graft is the best choice for the treatment of bone defect, it provides many problems such as donor site morbidity, irregular absorption, and limited amount of harvest. To overcome the shortcomings of autogenous bone graft many bone substitutes have been introduced. The ideal bone substitution is to have characteristics such as cheap, easy to obtain, rapid fusion to recipient bone, hard structure, long maintenance of shape and volume, low infection rate, and low exposure rate. Among those bone substitutes which have been widely used we chose lyophilized cartilage allograft because of low antigenecity, low resorption rate, easiness of carving and ling term preservation. From August 1993 to August 1997, 66 patients had been performed craniomaxillofacial reconstruction with lyophilized cartilage allograft. Orbital wall reconstruction and correction of enophthalmos were 24, correction of cleft lip and nose deformity were 19, temporal augmentations were 7, and others 16. Complications such as infection, exposure were not common. And partially removed cartilage was proved some calcification. Radiologic follow-up presented well positioned lyophilized cartilage allograft. Two radiologic works revealed haziness of bone density at the site of cartilage allograft. This suggests the ossification of lyophilized cartilage allograft. Together with liw infection rate, low exposure rate, and good framework for osteoconduction, lyophilized cartilage allograft are regarded as one of the good bone substitutes.
Absorption
;
Allografts*
;
Bone Density
;
Bone Regeneration
;
Bone Substitutes
;
Cartilage*
;
Cleft Lip
;
Congenital Abnormalities
;
Enophthalmos
;
Follow-Up Studies
;
Humans
;
Nose
;
Orbit
;
Tissue Donors
;
Transplants
5.Relationship between G-induced Loss of Consciousness and Parameters of Vestibulo-ocular Reflex.
Korean Journal of Aerospace and Environmental Medicine 2007;17(1):22-27
BACKGROUND: Vestibular reflexes, such as vestibulo-sympathetic reflex, have been considered as an important physiologic mechanism to maintain peripheral vascular resistance in case of orthostatic stress. Vestibular function may play an important role not only in maintaining spatial orientation, but also in determining G-tolerance. The purpose of this study was to investigate the possible contribution of vestibular function to G-tolerance. METHODS: Vestibular function was measured indirectly in 86 subjects by analyzing vestibulo-ocular reflex (VOR) using a rotating chair test. They were also exposed to +6Gz acceleration for 30 seconds with rapid onset run (1 G/sec). After G-exposure, they were classified into the Pass and the G-LOC group according to their success or failure to maintain consciousness during G-exposure. The VOR parameters of the G-LOC group were compared with those of the Pass group. RESULTS: While VOR gain values of one subset of the G-LOC group (low gain G-LOC group, N=8) were significantly lower than those of the Pass group at rotation frequencies of 0.02, 0.04, 0.08, and 0.32 Hz, VOR gain values of the other subset of the G-LOC group (high gain G-LOC group) were significantly higher than those of the Pass group at all rotation frequencies. There was no difference of VOR phase value between the Pass and the G-LOC groups. CONCLUSIONS:This study suggests the vestibular function may be involved in determining G-tolerance. According to VOR gain values, we were able to recognize two distinct G-LOC subgroups compared with the Pass group. The difference between afferent or efferent vestibular flows and target organ response can be a possible explanation for different VOR parameters of G-LOC subgroups.
Acceleration
;
Consciousness
;
Reflex
;
Reflex, Vestibulo-Ocular*
;
Unconsciousness*
;
Vascular Resistance
6.Lobectomy with video-assisted thoracoscopy.
Yong Han YOON ; Doo Yun LEE ; Hae Hyoon KIM ; Gi Man BAE
The Korean Journal of Thoracic and Cardiovascular Surgery 1993;26(3):236-240
No abstract available.
Thoracoscopy*
7.The Results of Aeromedical Consultation, ROKAF: 1991-2000.
Sang Ho HWANG ; Han Doo YOON ; Moo Hoon LEE
Korean Journal of Aerospace and Environmental Medicine 2001;11(4):187-193
BACKGROUND: This study is aimed to analyze the results of aeromedical consultation of ROKAF for recent 10 years. METHODS: We reviewed the records of all ROKAF rated personnel who developed a medical problem requiring aeromedical consultation during the period from 1991 to 2000. RESULTS: We collected 263 cases. The most frequent clinical categories were ENT and musculoskeletal problems. In the group of fighter pilots, 30 cases were classified into permanent grounding. Chronic hepatitis and Herniated disc were the main causes. In the group of undergraduate pilots, aerotitis media by high altitude flight and airsickness by high performance flight, were the main causes. CONCLUSION: According to this study, we need to reinforce the supervision about the revealed major causes.
Altitude
;
Hepatitis, Chronic
;
Intervertebral Disc Displacement
;
Motion Sickness
;
Organization and Administration
8.Stevens-Johnson Syndrome Associated with Toxic Hepatitis.
Doo Han KIM ; Jung Bock LEE ; Yoon Kee PARK ; Sung Nack LEE
Korean Journal of Dermatology 1977;15(2):205-209
Pseudoxanthoma. elasticum is a rare, heritable, systemic disease of connective tissue characterized by degeneration of elastic tissue and mainly affecting the skin, eyes and blood vessels. Recently, according to Pope (1974), it can be inherited as an autosomal dominant or recessive trait. We presented a study of 5 cases of pseudoxanthoma elasticum of autosomal recessive inheritance, which showed typical peau d'orange skin lesions. Two among the 5 cases were associated with angioid streaks, a case with myopia and broderline mental retardation, and 2 cases without any other systemic disturbances.
Angioid Streaks
;
Blood Vessels
;
Connective Tissue
;
Drug-Induced Liver Injury*
;
Elastic Tissue
;
Intellectual Disability
;
Myopia
;
Pseudoxanthoma Elasticum
;
Skin
;
Stevens-Johnson Syndrome*
;
Wills
9.Pseudozanthoma Elasticum: Report of 5 Case.
Doo Han KIM ; Yoon Kee PARK ; Jung Bock LEE ; Sung Nack LEE
Korean Journal of Dermatology 1977;15(2):197-203
Pseudoxanthoma. elasticum is a rare, heritable, systemic disease of connective tissue characterized by degeneration of elastic tissue and mainly affecting the skin, eyes and blood vessels. Recently, according to Pope (1974), it can be inherited as an autosomal dominant or recessive trait. We presented a study of 5 cases of pseudoxanthoma elasticum of autosomal recessive inheritance, which showed typical peau d'orange skin lesions. Two among the 5 cases were associated with angioid streaks, a case with myopia and broderline mental retardation, and 2 cases without any other systemic disturbances.
Angioid Streaks
;
Blood Vessels
;
Connective Tissue
;
Elastic Tissue
;
Intellectual Disability
;
Myopia
;
Pseudoxanthoma Elasticum
;
Skin
;
Wills
10.The Outcomes of Proximal Humerus Fractures with Medial Metaphyseal Disruption Treated with Fibular Allograft Augmentation and Locking Plate.
Doo Sup KIM ; Yeo Seung YOON ; Sang Kyu KANG ; Han Bin JIN ; Dong Woo LEE
Clinics in Shoulder and Elbow 2017;20(2):90-94
BACKGROUND: Proximal humerus fracture is considered to be the third most common fracture for patients aged 65 years or older. Conservative treatment has been known to treat most of humerus fracture. However, fractures with severe displacement or dislocation may require surgical treatment. Intramedullary fibular allograft with a locking plate is frequently used in patients accompanying medial metaphyseal disruption. In this study, author intends to evaluate clinical and imaging results based on patients who underwent surgical treatment using fibular allograft with a locking plate. METHODS: This study is conducted prospectively at Wonju Severance Christian Hospital, targeting patients who previously underwent surgical treatment using open reduction and intramedullary fibular allograft with a locking plate between 2011 and 2015. A total of 26 patients were evaluated on the following: postoperational clinical assessment measuring Constant score, American Shoulder and Elbow Society (ASES) score, and the Disabilities of the Arm, Shoulder and Hand (DASH) score. Postoperational imaging assessments are evaluated via measuring the neck-shaft angle. The study subject were Neer classification type 3, 4 proximal humerus fracture cases with disrupted medial hinge and having cortical comminution in the region of the surgical neck. RESULTS: The average period of progression was 22.5 months, and the average age of patients was 72.6 years. At the final follow-up, the average Constant, average ASES, and average DASH scores were 80.1, 78.5, and 20.6 respectively. The average neck-shaft angle was 127.5°. CONCLUSIONS: In conclusion, fibular allograft augmentation with a locking plate showed satisfying results in both clinical and imaging studies.