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Kang-neung, South Korea

Yi J.S.,University of Ulsan | Lim H.W.,Gangneung Asan Hospital | Chang Y.S.,Samsung | Choi S.H.,Jeju National University | And 2 more authors.
Annals of Otology, Rhinology and Laryngology | Year: 2014

Objectives: The purpose of this study was to estimate the rates of functional recovery of the facial nerve and of total tumor resection in patients who undergo short anterior rerouting and long anterior rerouting of the facial nerve in removal of skull base tumors. Methods: We retrospectively collected data on 37 patients with skull base tumors who underwent facial nerve rerouting during the procedure for tumor removal. Information on the rerouting technique, the completeness of tumor resection, and changes in facial nerve function were obtained from the medical records. Rerouting techniques were classified as short anterior rerouting or long anterior rerouting. Results: Ten of 16 patients (62.5%) in the group with short anterior rerouting showed postoperative facial palsy, and all completely recovered within 1 year. In the group with long anterior rerouting, 18 of 21 patients (85.7%) showed postoperative facial palsy, and recovery to a preoperative level of facial function was found in 10 patients at 1 year of follow-up. Total tumor resection was possible in 94% and 81% of patients with short rerouting and long rerouting, respectively. The mean operation time was not significantly related to the postoperative recovery of facial function. Conclusions: Short rerouting techniques, when appropriately chosen on the basis of tumor and patient characteristics, offer excellent preservation of facial function and tumor resection, comparable to those of long rerouting techniques. © The Author(s) 2014.


Won J.H.,Ajou University | Bista A.B.,Ajou University | Bae J.I.,Ajou University | Oh C.K.,Ajou University | And 3 more authors.
American Journal of Roentgenology | Year: 2012

OBJECTIVE. The objective of our study was to evaluate the efficacy and safety of a venotomy and manual propulsion technique that is performed to treat failed native arteriovenous fistulas (AVFs) with chronic organized thrombi. MATERIALS AND METHODS. For this study, we retrospectively reviewed a total of 69 venotomy and manual propulsion procedures performed from October 2005 to July 2009 in 56 patients for the treatment of native AVFs occluded by chronic thrombi. Inflow, anastomotic, and outflow veins were occluded using balloon catheters. Venotomy was made in the thrombi-bearing vein, and thrombi were propelled toward the venotomy site in a "milking" manner and were removed. After repair of the venotomy using simple interrupted sutures, the occlusion balloons were deflated. Angioplasty of the underlying stenosis was performed. RESULTS. Technical success was achieved in 95.7% of the procedures and clinical success was achieved in 91.3%. The follow-up duration was 1-50 months (mean, 16.7 months), with 3-, 6-, and 12-month primary patency rates of 92.5%, 80.8%, and 58.1%, respectively, and secondary patency rates of 98.1%, 96.2%, and 91.7%. The complication rate was 7.24%, with two major and three minor complications. CONCLUSION. The venotomy and manual propulsion technique is effective and safe for the removal of chronic and organized thrombi from occluded native AVFs. © American Roentgen Ray Society.


Sin H.Y.,Gangneung Asan Hospital | Kim J.Y.,Endocrinology | Jung K.H.,Duksung Womens University
Archives of Pharmacal Research | Year: 2011

Metformin reduces total cholesterol level, low density lipoprotein cholesterol (LDL-C) level, blood glucose level and increases high density lipoprotein cholesterol (HDL-C) level associated with cardiovascular disease. We evaluated effect of metformin on lipid profile in Korean patients with type 2 diabetes aged 64 yeras or older. We retrospectively examined 307 outpatients treated with metformin in a hospital setting with a follow-up period of 4.7 years. Metformin was not associated with the improvement in total cholesterol level (adjusted mean difference; 30.6 mg/dl, 95% CI: 24.9 to 36.4) and HDL-C level (adjusted mean difference; 2.6 mg/dl, 95% CI: 0.09 to 4.64) but may be associated with improvement in triglyceride level (adjusted mean difference; 41.5 mg/dl, 95% CI: 24.7 to 58.3). In comparison to the placebo groups (Kooy et al., 2009), there was a 1.5-fold decrease in triglyceride level and a 2-fold decrease in HDL-C level in our study. The frequency of Scr level that increased above the defined level [Scr ≥ 1.5 mg/dl for male, ≥ 1.4 mg/dl for female] was 6.7% [mean difference of elevated Scr: -0.9 mg/dl, 95% CI: -0.41 to -1.44, p < 0.002]. To confirm the efficacy of metformin use on triglyceride level and HDL-C level associated with the risk of cardiovascular disease in patient with diabetes, further placebo-controlled investigations are required. © 2011 The Pharmaceutical Society of Korea and Springer Netherlands.


Kweon H.,National Academy of Agricultural Science | Lee S.-W.,Gangneung Asan Hospital | Hahn B.-D.,Korea Institute of Materials Science | Lee Y.-C.,Bestian Hospital | Kim S.-G.,Gangneung - Wonju National University
Journal of Oral and Maxillofacial Surgery | Year: 2014

Purpose: The objective of this study was to compare bone formation after installation of uncoated (UC), hydroxyapatite-coated (HA), collagen plus HA-coated (CH), and silk plus HA-coated (SH) implants. Materials and Methods: Implants in the UC group had acid-etched surfaces. Surface coating was applied using the aerosol deposition method. Cellular responses on the coated surfaces were examined with scanning electron microscopy. Cellular responses to the surfaces were studied with the corresponding coated discs and MG63 cells. Subsequently, 3-(4, 5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and alkaline phosphatase (ALP) assays were performed. Peri-implant bone formation was evaluated with the rabbit tibia model. Twenty-four implants from each group were installed. The animals were sacrificed 6 weeks after implant installation. Peri-implant bone formation and implant-to-bone contact were measured in histologic sections. Significance of differences across groups was evaluated using analysis of variance. Results: Scanning electron microscopic images showed that the CH and SH groups exhibited cells that appeared more spread out than those in the other groups. The SH group exhibited the highest value in the MTT assay. The CH group exhibited the highest level of ALP activity. Comparisons of these modifications with the acid-etched surfaces showed that the CH and SH groups displayed significantly greater periimplant bone formation (P < .001). Conclusion: The SH group displayed significantly greater new bone formation and bone-to-implant contact than did the other groups. © 2014 American Association of Oral and Maxillofacial Surgeons


Lim J.,Gangneung Asan Hospital | Lyu J.,University of Ulsan | Choi C.-M.,University of Ulsan | Oh Y.-M.,University of Ulsan | And 5 more authors.
International Journal of Tuberculosis and Lung Disease | Year: 2010

SETTING: South Korea, 2005-2007. BACKGROUND: Non-tuberculous mycobacterial diseases presenting as solitary pulmonary nodules (NTM-SPN) are rare and may be misdiagnosed as tuberculoma. DESIGN: Eleven NTM-SPN patients were enrolled retrospectively and compared with two groups each of 33 patients with upper lobe cavitary (UC) and nodular bronchiectatic (NB) type NTM diseases, respectively. RESULTS: The patients' median age was 52 years. Compared with UC-type disease, NTM-SPN patients showed female (n = 9) and never smoker (n = 8) predominance and fewer comorbidities (n = 0; P < 0.05 for each). M ycobacterium avium (n = 9) was predominant in NTM-SPN patients, followed by M. intracellulare (n = 2), whereas M. intracellulare was most frequently isolated from patients with both UC- and NB-type NTM (P < 0.05). The nodules were a median of 2.3 cm in diameter (range 1.6-6.3 cm) and were distributed evenly in all lobes. In all patients, percutaneous needle aspiration/ biopsy was performed with a median 71 days of diagnostic delay. Ten patients successfully completed treatment, and one showed spontaneous reduction of nodule size without treatment. Reverse blot hybridisation assays of six DNA samples identified four subjects with M. avium-intracellulare complex (MAC), in line with conventional test data. CONCLUSION: NTM-SPN was caused exclusively by MAC. Although clinical outcome was favourable, confirmatory diagnosis was delayed. Molecular methods are needed for early diagnosis of NTM-SPN. © 2010 The Union.

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