1.Use of quadruple bags for pediatric transfusion.
Nam Yong LEE ; Suk Woon KWON ; Sang In KIM
Korean Journal of Blood Transfusion 1992;3(1):9-13
No abstract available.
2.An experimental study on the fatigue fracture of laminate porcelain.
Charn Woon PARK ; Tae Sung BAE ; Sang Don LEE
The Journal of Korean Academy of Prosthodontics 1993;31(4):482-505
No abstract available.
Dental Porcelain*
;
Fatigue*
;
Fractures, Stress*
3.Congenital Cavernous Lymphangioma in Wrist
Seung Koo LEE ; Han CHANG ; Woon Sang KWAK
The Journal of the Korean Orthopaedic Association 1987;22(2):569-572
Lymphangioma is composed of lymphatic tissue and filled with clear or chylous fluid that develops most often in the skin and subcutaneous tissue of neck but relatively rare in extremities. It is perhaps a congnital malformation rather than a true neoplasm, and so most of these lesions are usually present at birth and have a tendency to grow very slowly. If it is developed with a cavernous type of lymphangioma, it will have more aggressive and infiltrative tendency because their margin is usually adhesive with adjacent normal tissue. A case of cavernous lymphangioma on the right wrist of an eight month old female infant, treated by surgical excision is followed up over one year and presented here with a review of the literature.
Adhesives
;
Extremities
;
Female
;
Humans
;
Infant
;
Lymphangioma
;
Lymphoid Tissue
;
Neck
;
Parturition
;
Skin
;
Subcutaneous Tissue
;
Wrist
5.Accuracy of 18F FDG PET after Surgery and Radiotherapy in Head and Neck Cancers.
Weon Il YANG ; Chang Woon CHOI ; Yong Sik LEE ; Byeung Il KIM ; Jae Sung LEE ; Sang Moo LIM ; Yoon Sang SHIM ; Sung Woon HONG
Korean Journal of Nuclear Medicine 1999;33(6):466-474
PURPOSE: The purpose of this study was to evaluate the diagnostic accuracy of [18F]FDG PET in the diagnosis of recurrent head and neck cancer after the completion of surgery and radiotherapy in patients with head and neck cancers. MATERIALS AND METHODS: In fifty-nine patients with head and neck cancers, whole body [18F]FDG PET studies were performed. According to the different therapeutic modalities, patients were divided into four groups (Group I; pre-treatment, Group II; surgery, Group III; radiotherapy, Group IV; both surgery and radiotherapy). [18F]FDG PET images were compared with clinical, CT and histopathologic findings. RESULTS: For detection of metastatic lymph nodes in 14 patients of pre-treatment group (group I), the sensitivity and specificity of PET were 100% (10/10) and 75% (3/4), and those of CT were 80% (8/10) and 100% (4/4). For detection of recurrence in 45 patients of post-treatment group, overall sensitivity and specificity of PET were 96.2% (25/26) and 78.9% (15/19) [(100% and 75% in group II, 80% and 50% in group III, and 100% and 100% in group IV)] without significant difference from pre-treatment group (p>0.1). In detecting recurrence, the sensitivity and specificity of [18F]FDG PET were 90.9% (10/11) and 20% (1/5) in 16 patients who underwent [18F]FDG PET within 2 months after the completion of treatment. The specificity of these patients was significantly lower than that of 29 patients (100% of sensitivity and specificity) who underwent [18F]FDG PET 2 months after treatment (p<0.05). CONCLUSION: [18F]FDG PET is an accurate diagnostic modality for the detection of recurrence in head and neck cancer. Post-therapy [18F]FDG PET should be obtained at least 2 months after the completion of surgery or radiotherapy.
Diagnosis
;
Head and Neck Neoplasms
;
Head*
;
Humans
;
Lymph Nodes
;
Neck*
;
Radiotherapy*
;
Recurrence
;
Sensitivity and Specificity
6.Amniotic Fluid Embolism during Dilatation and Curettage in a Second Trimesteric Missed Aborted Pregnant Patient.
Bong Il KIM ; Seung Hee PAEK ; Woon Seok RHO ; Sang Pyung LEE ; Soung Kyung CHO ; Sang Hwa LEE
Korean Journal of Anesthesiology 1997;33(4):778-783
Amniotic fluid embolism (AFE) is a rare but devasting obstetric emergency. We experienced a case of AFE during dilatation and curettage (D & C) in a 15 2/7 weeks pregnant woman, age 30, who was diagnosed as having a missed abortion. Sudden rapid hypoxemia, low SpO2, hypotension, low PETCO2, high CVP, and tachycardia, right axis deviation and right bundle branch block in 12 leads ECG were developed during D &C under general anesthesia, and signs of disseminated intravascular coagulation (DIC) followed after the operation, which are consistent with the findings of AFE. Even though there was no definite pathologic and radiologic confirmation of AFE, laboratory findings showed 100 times higher level of alpha-fetoprotein in her central venous blood than same weeks of missed abortion woman's blood. Though it is rare, the anesthesiologist should always suspect the possibility of AFE, when the patient shows an unexplained collapse, cyanosis, low PETCO2, high CVP, low SpO2, ECG change and DIC during any kind of obstetric procedure.
Abortion, Missed
;
alpha-Fetoproteins
;
Amniotic Fluid*
;
Anesthesia, General
;
Anoxia
;
Axis, Cervical Vertebra
;
Bundle-Branch Block
;
Cyanosis
;
Dacarbazine
;
Dilatation and Curettage*
;
Dilatation*
;
Disseminated Intravascular Coagulation
;
Electrocardiography
;
Embolism, Amniotic Fluid*
;
Emergencies
;
Female
;
Humans
;
Hypotension
;
Pregnancy
;
Pregnancy Trimester, Second*
;
Pregnant Women
;
Tachycardia
7.A Case of Hyperthyroidism.
Cheol Woon BEAK ; Seung Geun HONG ; Sang Geel LEE ; Im Joo KANG
Journal of the Korean Pediatric Society 1983;26(10):1033-1038
No abstract available.
Hyperthyroidism*
8.Thallium-201 uptake and washout in T1-201 brain SPECT of various brain tumors.
Sang Moo LIM ; Sung Woon HONG ; Chang Hun RHEE ; Seung Hoon LEE ; Jong Hyun KIM
Korean Journal of Nuclear Medicine 1992;26(2):360-364
No abstract available.
Brain Neoplasms*
;
Brain*
;
Tomography, Emission-Computed, Single-Photon*
9.Improved Activity Estimation using Combined Scatter and Attenuation Correction in SPECT.
Jeong Rim LEE ; Chang Woon CHOI ; Sang Moo LIM ; Seong Wun HONG
Korean Journal of Nuclear Medicine 1998;32(4):382-390
PURPOSE: The pvrpose of this study was to evaluate the accuracy of radioactivity quantitation in Tc-99m SPECT by using combined scatter and attenuation correction. MATERIALS AND METHODS: A cylindrical phantom which simulates tumors (T) and normal tissue (B) was filled with varying activity ratios of Tc-99m. We acquired emission scans of the phantom using a three-headed SPECT system (Trionix, Inc.) witb two energy windows (photopeak window: 126 154 keV and scatter window: 101 123 keV). We performed the scatter correction with dual-energy window subtraction method (k=0.4) and Chang attenuation correction. Three sets of SPECT images were reconstructed using combined scatter and attenuation correction (SC+AC', attenuation correction (AC) and without any correction (NONE). We compared T/B ratio, irnage contrast [(T-B)/(T+B)) and absolute radioactivity with true values. RESULTS: SC+AC images had the highest mean values of T/B ratios. Image contrast was 0.92 in SC+AC, which was close to the true value of 1, and higher than AC (0.77) or NONE (0.80). Errors of true activity by SPECT images ranged from 1 to 11% for SC+AC, 22-47% for AC, and 2 16% for NONE in a phantom which was located 2.4cm from the phantom surface. In a phantom located 10,0cm from the surface, SC+AC underestimated by ?4%, NON.E 40%. However, AC overestimated by 10%. CONCLUSION: We conclude that accurate SPECT activity quantitation of Tc-99m distribution can be achieved by dual window scatter correc.tion combined with attenuation correction.
Radioactivity
;
Tomography, Emission-Computed, Single-Photon*
10.Membranes for the Guided Bone Regeneration.
Maxillofacial Plastic and Reconstructive Surgery 2014;36(6):239-246
Many kinds of membrane have been used for the guided bone regeneration (GBR) technique. However, most membranes do not fulfill all requirements for the ideal membrane for the GBR technique. Among them, collagen membrane has been most widely used. However, its high price and weak tensile strength in wet condition are limitations for wide clinical application. Synthetic polymers have also been used for the GBR technique. Recently, silk based membrane has been considered as a membrane for the GBR technique. Despite many promising preclinical data for use of a silk membrane, clinical data regarding the silk membrane has been limited. However, silk based material has been used clinically as vessel-tie material and an electrospun silk membrane was applied successfully to patients. No adverse effect related to the silk suture has been reported. Considering that silk membrane can be provided to patients at a cheap price, its clinical application should be encouraged.
Bone Regeneration*
;
Collagen
;
Humans
;
Membranes*
;
Polymers
;
Silk
;
Sutures
;
Tensile Strength