1.The Effect of CO2 Insufflation and Trendelenburg-lithotomy Position on Intraocular Pressure during Laparoscopy.
Bo Ryoung LEE ; Young Cheol WOO ; Gill Hoi KOO
Korean Journal of Anesthesiology 1997;33(3):529-532
BACKGROUND: The laparoscopy requires carbon dioxide (CO2) insufflation and Trendelenburg position for operational convenience. However, the above circumstances affect the cardiopulmonary systems significantly and intraocular pressure (IOP) may be also influenced. METHODS: In 27 non-glaucoma patients right and left intraocular pressure (RIOP, LIOP) were measured 5 minutes after induction of general anesthesia (control value), 15 and 30 minutes after CO2 insufflation and endelenburg-lithotomy position. RESULTS: The control values of RIOP and LIOP were 11.3 4.7 mmHg and 11.5 4.7 mmHg respectively. At 15 minutes after CO2 insufflation and Trendelenburg-lithotomy position, they increased to 16.6 5.3 mmHg and 17.0 5.9 mmHg (p<0.05). At 30 minutes, 18.4 3.5 mmHg and 18.2 4.1 mmHg (p<0.05). CONCLUSION: CO2 insufflation and Trendelenburg-lithotomy position increase IOP significantly in non-glaucoma patients during laparoscopy.
Anesthesia, General
;
Carbon Dioxide
;
Head-Down Tilt
;
Humans
;
Insufflation*
;
Intraocular Pressure*
;
Laparoscopy*
2.Hypocalcemic Convulsion in Formula Feeding Young Infants.
Cheol Woo KO ; Ja Hoon KOO ; Mi Jung KIM
Journal of the Korean Society of Pediatric Nephrology 1998;2(1):14-19
Adenoid cystic carcinoma arising from the submucosal glands of the trachea and bronchial tree is rare. The histopathology and natural history of bronchial adenoid cystic carcinoma have been well documented, but detailed descriptions of its cytomorphology are few. We report a case of primary bronchial adenoid cystic carcinoma in a 20-year-old female, diagnosed by bronchial brushing cytology. The cytologic specimens showed large clusters of small cells arranged around cystlike spaces containing globular basophilic material.
Basophils
;
Bronchi
;
Carcinoma, Adenoid Cystic
;
Ependymoma
;
Female
;
Humans
;
Infant*
;
Natural History
;
Seizures*
;
Spinal Cord
;
Trachea
;
Young Adult
3.Idiopathic hypercalciuria in children with hematuria.
Ki Young KOO ; Jong Ho LEE ; Cheol Woo KO ; Ja Hoon KOO
Korean Journal of Nephrology 1992;11(3):248-252
No abstract available.
Child*
;
Hematuria*
;
Humans
;
Hypercalciuria*
4.Effects of surface coating on the screw release of dental implant screw.
Cheol In KOO ; Chae Heon CHUNG ; Han Cheol CHOE
The Journal of Korean Academy of Prosthodontics 2004;42(2):210-225
STATEMENT OF PROBLEM: Implant screw loosening has been remained problem in restorative practices. Surface treatment of screw plays a role of preventing screw from loosening in implant screw mechanism. PURPOSE: The purpose of this study was to investigate surface characteristics of TiN and ZrN film ion plated screw with titanium and gold alloy screw and to evaluate wear resistance, surface roughness, and film adhesion on screw surface using various instruments. MATERIAL AND METHODS: GoldTite screws and titanium screws provided by 3i (Implant Innovation, USA) and TorqTite screws or titanium screws by Steri-Oss (Nobel Biocare, USA) and gold screws and titanium screws by AVANA (Osstem Implant, korea) were selected. Ion plating which is much superior to other surface modification techniques was carried out for gold screws and titanium screws using Ti and Zr coating materials with nitrogen gas. Ion nitrided surface of each abutment screw was observed with field emission scanning electron microscopy(FE-SEM), micro-diamond scratch tester, vickers hardness tester, and surface roughness tester. RESULTS: 1) The surface of gold screw and GoldTite is more smooth than ones of other kinds of non coated screw. 2) The ZrN and TiN coated surface is the more smooth than ones of other kinds of screw. 3) The hardness of TiN and ZrN coated surface showed higher than that of non coated surface. 4) The TiN coated titanium screw and ZrN coated gold screw have a good wear resistance and adhesion on the surface. 5) The surface of ZrN coated screw showed low surface roughness compared with the surface of TiN coated screw. CONCLUSION: It is considered that the TiN and ZrN coated screw which would prevent a screw from loosening can be appilcable to implant system and confirmed that TiN and ZrN film act as lubricant on surface of screw due to decrease of friction for recycled tightening and loosening.
Alloys
;
Dental Implants*
;
Friction
;
Hardness
;
Hardness Tests
;
Nitrogen
;
Tin
;
Titanium
5.Chronic mercury vapor poisoning of the lung plain radiograph and high resolution CT.
Choong Ki PARK ; Woo Cheol HWANG ; Joon Young NHO ; Bum Gyu AHN ; Hyo Cheol WOO ; Heung Cheol KIM ; Myoung Koo LEE
Journal of the Korean Radiological Society 1993;29(5):961-966
Authors analyzed the findings of findings of chest radiographs and high-resolution CT(HRCT) of chronic mercury vapor poisoning in 12 patients who were diagnosed by previous working history for mercury-thermometer and high level of mercury in blood and urine. The purpose of this paper is to introduce the HRCT findings of chronic mercury vapor poisoning. Duration of mercury exposure was ranged from 10 to 41 months(mean, 21.8 months). Estimated value of serum mercury was ranged from 3.6 to 8.7µg/dl(mean, 5.3 µg/dl: normal value is less than 0.5µg/dl). Estimated value of mercury in urine was ranged from 104 to 482µg/1(mean, 291.4µg/1: normal value is less than 20µg/1). Chest radiographs showed positive findings such as ground-glass opacities and peribronchial cuffings in only 2 out of 12 patients, but HRCT showed positive findings such as ground-glass opacities in 8 patients, peribronchial cuffings in 7 patients, centrilobular abnormalities in 5 patients, interface sign in 4 patients, interlobular septal thickening with intralobular lines in 2 patients and lobular consolidation in one patient. In conclusion, chest HRCT is superior to chest radiograph to show the pulmonary manifestation of chronic mercury vapor poisoning. In patients with chronic mercury vapor poisoning, HRCT findings of centrilobular distributed ground-glass opacities and peribronchial cuffinges are characteristic.
Humans
;
Lung*
;
Poisoning*
;
Radiography, Thoracic
;
Reference Values
;
Thorax
6.Asymptomatic Primary Hematuria in Children.
Min Hyun CHO ; You Cheol JANG ; Young Cheol KIM ; Cheol Woo KO ; Ja Hoon KOO
Journal of the Korean Society of Pediatric Nephrology 2004;8(2):166-175
PURPOSE: Present study has been undertaken to determine the distribution of various renal diseases causing asymptomatic hematuria in children and to evaluate the benefit of doing renal biopsy in these children. METHODS: Study population consisted of 146 children with asymptomatic primary hematuria who had been admitted to the pediatric department of Kyungpook National University Hospital for the past 4 years from 1999 to 2002. In 122 out of 146 cases, renal biopsy was performed percutaneously and in 24 out of 146 cases, diagnosed as idiopathic hypercalciuria, oral calcium loading test was performed. RESULTS: The age(mean+/-SD) at onset or discovery of hematuria of the 146 children included in this study was 8.0+/-3.2 years and the proportion of boys and girls was 54.8% and 45.2%, respectively. In 76 out of 146 cases(52%), asymptomatic hematuria was first diagnosed by school urinalysis screening. The proportion of histopathologic findings based on 122 biopsies was as follows : Thin Glomerular Basement Membrane(TGBM) 73 cases(50%); IgA nephropathy 20 cases(14%); Alport syndrome 6 cases(4%); Membranous Glomerulonephropathy(MGN) 4 cases(3%); Membranoproliferative Glomerulonephritis(MPGN) 2 cases(1%); IgA nephropathy with TGBM 3 cases(2%); "normal" glomeruli 14 cases(10%). Twenty four cases (16%) were diagnosed as idiopathic hypercalciuria. During follow-up periods, 15% of 146 cases became hematuria-free and renal function did not deteriorate in any cases. CONCLUSION: Unless hematuric children manifest poor prognostic indicators for renal survival, we would recommend long term regular follow-up prior to a renal biopsy.
Biopsy
;
Calcium
;
Child*
;
Female
;
Follow-Up Studies
;
Glomerulonephritis, IGA
;
Gyeongsangbuk-do
;
Hematuria*
;
Humans
;
Hypercalciuria
;
Mass Screening
;
Nephritis, Hereditary
;
Urinalysis
7.Two Cases of Allergic Contact Dermatitis to Rosehip Oil.
Hun Young JANG ; Yun Jeong LEE ; Dae Won KOO ; Chun Wook PARK ; Cheol Heon LEE
Annals of Dermatology 1996;8(2):114-116
No abstract available.
Dermatitis, Allergic Contact*
;
Rosa*
8.A Case of Infantile Acute hemorrhagic Edema.
Yun Jeong LEE ; Dae Won KOO ; Chun Wook PARK ; Cheol Heon LEE
Korean Journal of Dermatology 1994;32(2):332-336
Infantile acute hemorrhagic edema is a benign disease followed by a spontaneous eomplete recovery without sequelae, characterized by cockade purpura and inflamrntory edema on the face and extremities without any internal origin involvement in 4-month to 2-year-old infants. We report a case of infaniile acute hemorrhagic edema which occared in a 2-year-old female after an upper respiratory illness and compare the clinical and histologic features of this disorder with Henoch-Schonlein purpura.
Child, Preschool
;
Edema*
;
Extremities
;
Female
;
Humans
;
Infant
;
Purpura
;
Purpura, Schoenlein-Henoch
9.Asymptomatic Primary Hematuria in Children.
Jung Mi LEE ; Woo Saeng PARK ; Cheol Woo KO ; Ja Hoon KOO ; Jung Sik KWAK
Journal of the Korean Society of Pediatric Nephrology 2000;4(1):25-32
Localized or solitary fibrous tumor (SFT) of the pleura has been classified as a type of mesothelioma, arising from the submesothelial connective tissue cells. The preoperative diagnosis of the tumor at the cytologic or histologic level is very important for the proper handling of the lesion. This preoperative diagnosis is now possible by means of the advance in the transthoracic fine needle aspiration biopsy (FNA) techniques and in the very experience of the cytopathologists. We describe FNA cytologic feature of two cases of SFT arising from the pleura. Cytologic, histologic, immunohistochemical, and electron microscopic characteristics of pleural SFT are discussed. The tumor cells of SFT are spindle or oval in shape with a variable amount of cytoplasm. They are arranged in irregular trabeculae intimately ass- ociated with capillaries. A unique cytologic feature observed in this tumor is that thick, eosinophilic, amorphous collagen bundles are scattered between tumor cells
Biopsy
;
Biopsy, Fine-Needle
;
Capillaries
;
Child*
;
Collagen
;
Connective Tissue Cells
;
Cytoplasm
;
Diagnosis
;
Eosinophils
;
Hematuria*
;
Humans
;
Mesothelioma
;
Pleura
;
Rhabdomyosarcoma
;
Solitary Fibrous Tumors
10.Long-term Follow-up of Children with Idiopathic Hypercalciuria.
Cheol Woo KO ; Ja Hoon KOO ; Yong Seok LEE ; Won Hye SHIN
Journal of the Korean Society of Pediatric Nephrology 1998;2(1):34-40
Malignant fibrous histiocytoma is the most common soft tissue sarcoma of late adult life, but it is rare in the pleura. We recently experienced a case of cytology of malignant fibrous histiocytoma in pleural fluid. The smear revealed histiocytic malignant cells, spindle malignant cells and inflammatory cells. The histiocytic cells showed abundant, pale cytoplasm and ovoid, irregular, eccentrically-placed nuclei. The spindle cells showed elongated nuclei. Intercellular collagen was also present.
Adult
;
Child*
;
Collagen
;
Cytoplasm
;
Diagnostic Errors
;
Follow-Up Studies*
;
Histiocytoma, Malignant Fibrous
;
Humans
;
Hypercalciuria*
;
Pilomatrixoma
;
Pleura
;
Sarcoma