1.An experimental study on balloon catheter pulmonary valvuloplasty: Comparison between single and double balloon catheters.
Kyung Mo YEON ; Ho Kyu LEE ; Yong Soo YOON ; Yong Moon SHIN ; Man Chung HAN
Journal of the Korean Radiological Society 1993;29(3):410-420
Balloon pulnounary valvuloplasty is an established method in the treatment of congenital valvular pulmonary stenosis. Balloon valvuloplasty was performed by using one or two balloons in a total of 19 mongrel dogs. Cross sectional area ratio ranging 145-406% was used to compare the relative sizes of the pulmonary annulus the balloon Hemodynamic changes and cardiac damages in single and double balloon groups were analyzed. Survival time of double balloon group was longer than that of single balloon group(P<0.05). Increment of the right ven?dular systolic pressure in single balloon group (mean 38 mmHg) was greater than that in double balloon group (mean 18 mmHg) (p<0.05). Decrement of the femoral arterial pressure in single balloon group (mean 87 mmHg) was greater than in double balloon group (mean 41 mmHg) (p<0.05). The locations of trauma were mainly the right ventricular free wall, the main pulmonary artery, the anterior leaflet of the pulmonary valve and in a less degree, anterior wall of the right atrium, the right ventricular outflow tract and the left pulmonary artery in the order of frequency. There were no significant differences in cardiac damages between single and double balloon groups (P>0.05). Major microscopic findings were sloughing of the endotheliu, fibrin deposition, hemorrhage, localized myocardial infarction and so on. In conclusion, double balloon pulmonary valvuloplasty is superior to single balloon technique in survival time and hemodynamics. Therefore, double, balloon technique is recommended for the pulmonary valvuloplasty.
Animals
;
Arterial Pressure
;
Balloon Valvuloplasty
;
Blood Pressure
;
Catheters*
;
Dogs
;
Fibrin
;
Heart Atria
;
Hemodynamics
;
Hemorrhage
;
Methods
;
Myocardial Infarction
;
Pulmonary Artery
;
Pulmonary Valve
;
Pulmonary Valve Stenosis
2.An experimental study on balloon catheter pulmonary valvuloplasty: Comparison between single and double balloon catheters.
Kyung Mo YEON ; Ho Kyu LEE ; Yong Soo YOON ; Yong Moon SHIN ; Man Chung HAN
Journal of the Korean Radiological Society 1993;29(3):410-420
Balloon pulnounary valvuloplasty is an established method in the treatment of congenital valvular pulmonary stenosis. Balloon valvuloplasty was performed by using one or two balloons in a total of 19 mongrel dogs. Cross sectional area ratio ranging 145-406% was used to compare the relative sizes of the pulmonary annulus the balloon Hemodynamic changes and cardiac damages in single and double balloon groups were analyzed. Survival time of double balloon group was longer than that of single balloon group(P<0.05). Increment of the right ven?dular systolic pressure in single balloon group (mean 38 mmHg) was greater than that in double balloon group (mean 18 mmHg) (p<0.05). Decrement of the femoral arterial pressure in single balloon group (mean 87 mmHg) was greater than in double balloon group (mean 41 mmHg) (p<0.05). The locations of trauma were mainly the right ventricular free wall, the main pulmonary artery, the anterior leaflet of the pulmonary valve and in a less degree, anterior wall of the right atrium, the right ventricular outflow tract and the left pulmonary artery in the order of frequency. There were no significant differences in cardiac damages between single and double balloon groups (P>0.05). Major microscopic findings were sloughing of the endotheliu, fibrin deposition, hemorrhage, localized myocardial infarction and so on. In conclusion, double balloon pulmonary valvuloplasty is superior to single balloon technique in survival time and hemodynamics. Therefore, double, balloon technique is recommended for the pulmonary valvuloplasty.
Animals
;
Arterial Pressure
;
Balloon Valvuloplasty
;
Blood Pressure
;
Catheters*
;
Dogs
;
Fibrin
;
Heart Atria
;
Hemodynamics
;
Hemorrhage
;
Methods
;
Myocardial Infarction
;
Pulmonary Artery
;
Pulmonary Valve
;
Pulmonary Valve Stenosis
3.A study on the liver dysfunction due to dimethylformamide.
Seong Kyu KANG ; Jae Yeon JANG ; Kyung Yong RHEE ; Ho Keun CHUNG
Korean Journal of Occupational and Environmental Medicine 1991;3(1):58-64
No abstract available.
Dimethylformamide*
;
Liver Diseases*
;
Liver*
4.Metric dimensions and morphological characteristics of the superior articular surface of the atlas in Koreans.
Kyu Seok LEE ; Hee Jin KIM ; Hye Yeon LEE ; In Hyuk CHUNG
Korean Journal of Physical Anthropology 1993;6(2):229-238
No abstract available.
5.Morphology of the mylohyoid bridging in Korean mandibles.
Hee Jin KIM ; Kyu Seok LEE ; Hye Yeon LEE ; In Hyuk CHUNG
Korean Journal of Physical Anthropology 1993;6(2):219-227
No abstract available.
Mandible*
6.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
7.A Case of SRY Positive 46,XX Male.
Na Young CHUNG ; Yeong Heum YEON ; Min Ho JUNG ; Byung Kyu SUH ; Byung Churl LEE
Journal of Korean Society of Pediatric Endocrinology 2003;8(2):184-188
46,XX male is a rare abnormality of sex determination with an incidence of 1 in 20,000 male neonates. The clinical manifestations of 46,XX males are usually hypogonadism, gynecomastia, azoospermia, and hyalinations of seminiferous tubules, with altered hormonal levels at puberty. Less frequently, some sexual ambiguities are found, always with sterility owing to reduced testicular development. The origin of male phenotype in 46,XX male could be the results of at least three different mechanisms:translocations of Y sequence, including the SRY gene, to an X chromosome or to an autosome(about 90% of cases); a mutation in a yet unknown X-linked or autosomal gene in the testis-determinating pathway, and cryptic Y chromosome mosacism. We experienced a case of SRY-positive 46,XX male in a 21-year-old man with small testes. (J Korean Soc Pediatr Endocrinol 2003;8:184-188)
Adolescent
;
Azoospermia
;
Genes, sry
;
Gynecomastia
;
Humans
;
Hyalin
;
Hypogonadism
;
Incidence
;
Infant, Newborn
;
Infertility
;
Male*
;
Phenotype
;
Puberty
;
Seminiferous Tubules
;
Testis
;
X Chromosome
;
Y Chromosome
;
Young Adult
8.A Case of SRY Positive 46,XX Male.
Na Young CHUNG ; Yeong Heum YEON ; Min Ho JUNG ; Byung Kyu SUH ; Byung Churl LEE
Journal of Korean Society of Pediatric Endocrinology 2003;8(2):184-188
46,XX male is a rare abnormality of sex determination with an incidence of 1 in 20,000 male neonates. The clinical manifestations of 46,XX males are usually hypogonadism, gynecomastia, azoospermia, and hyalinations of seminiferous tubules, with altered hormonal levels at puberty. Less frequently, some sexual ambiguities are found, always with sterility owing to reduced testicular development. The origin of male phenotype in 46,XX male could be the results of at least three different mechanisms:translocations of Y sequence, including the SRY gene, to an X chromosome or to an autosome(about 90% of cases); a mutation in a yet unknown X-linked or autosomal gene in the testis-determinating pathway, and cryptic Y chromosome mosacism. We experienced a case of SRY-positive 46,XX male in a 21-year-old man with small testes. (J Korean Soc Pediatr Endocrinol 2003;8:184-188)
Adolescent
;
Azoospermia
;
Genes, sry
;
Gynecomastia
;
Humans
;
Hyalin
;
Hypogonadism
;
Incidence
;
Infant, Newborn
;
Infertility
;
Male*
;
Phenotype
;
Puberty
;
Seminiferous Tubules
;
Testis
;
X Chromosome
;
Y Chromosome
;
Young Adult
9.Evaluation of biological metabolites among the workers exposed todimethylformanide.
Ho Keun CHUNG ; Seong Kyu KANG ; Kyung Yong RHEE ; Jae Yeon JANG
Korean Journal of Occupational and Environmental Medicine 1992;4(2):144-150
No abstract available.
10.Evaluation of biological metabolites among the workers exposed todimethylformanide.
Ho Keun CHUNG ; Seong Kyu KANG ; Kyung Yong RHEE ; Jae Yeon JANG
Korean Journal of Occupational and Environmental Medicine 1992;4(2):144-150
No abstract available.