Abstract:
PURPOSE:To investigate 100 consecutive cases of videoscopic retrograde intrarenal surgery (RIRS) by a single surgeon and to evaluate factors associated with stone-free status and the learning curve thereof. MATERIALS AND METHODS:We analyzed the results of videoscopic RIRS in 100 patients who underwent primary treatment for renal stones from January 2015 to August 2016. Videoscopic RIRS were performed with URF-V and URF-V2 flexible video uteroscopes (Olympus) or a Flex-Xc flexible ureterorenoscope (KARL STORZ). Non-contrast computed tomography was taken at 3 months postoperatively to confirm the absence of stones. The stone characteristics included the location, maximal stone length (MSL), stone heterogeneity index (SHI), and mean stone density (MSD). Fragmentation efficacy was calculated as operative time (min) divided by removed MSL (mm), and was evaluated in the sequential order of operations. RESULTS:The mean age of the total patient was 60.0±14.0 years. The mean MSL was 13.1±6.2 mm. The average MSD was 734.2±327.6 Hounsfield unit (HU) and the SHI was 241.0±120.0 HU. The mean operation time was 65.1±45.7 min considering each renal unit. The stone-free rate at 3 months post-surgery was 87%. The estimated cut-off of the time-to-MSL ratio below 5 min/mm was 50. Multivariate analyses indicated a lower MSD [odds ratio (OR): 0.998; 95% confidence interval (CI): 0.996-0.999; p=0.047) and the last 50 cases (OR: 5.408, 95% CI: 1.337-30.426; p=0.030) as independent predictors of stone-free status after videoscopic RIRS. CONCLUSION:Low MSDs and the last 50 cases were significant predictors of stone-free rate in videoscopic RIRS.
journal_name
Yonsei Med Jjournal_title
Yonsei medical journalauthors
Jeong JY,Kim JC,Kang DH,Lee JYdoi
10.3349/ymj.2018.59.2.303subject
Has Abstractpub_date
2018-03-01 00:00:00pages
303-309issue
2eissn
0513-5796issn
1976-2437pii
59.303journal_volume
59pub_type
杂志文章abstract::CSF flow dynamics has been known to have a key role the pathogenesis of syringomyelia. Our purpose was to evaluate the CSF flow pattern in syringomyelia with spatial modulation of magnetization (SPAMM) that can depict directional flow, and to determine the relationship between flow dynamics and clinical outcome after ...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2002.43.1.37
更新日期:2002-02-01 00:00:00
abstract:PURPOSE:Hypoxia-inducible factor-1α (HIF-1α) increases transcription of the vascular endothelial growth factor (VEGF) gene. Inhibition of VEGF abolishes VEGF mediated induction of HIF-1α. Recent reports suggested that HIF-1α also mediated the induction of class III β-tubulin (TUBB3) in hypoxia. TUBB3 confers resistance...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2013.54.2.374
更新日期:2013-03-01 00:00:00
abstract:PURPOSE:Wnt and mammalian target of rapamycin (mTOR) are major molecular signaling pathways associated with the development and progression of tumor, as well as the maintenance and proliferation of cancer stem cells (CSCs), in colorectal cancer (CRC). Identifying patients at risk of poor prognosis is important to deter...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2020.61.7.572
更新日期:2020-07-01 00:00:00
abstract::Robotic colorectal surgery has gradually been performed more with the help of the technological advantages of the da Vinci system. Advanced technological advantages of the da Vinci system compared with standard laparoscopic colorectal surgery have been reported. These are a stable camera platform, three-dimensional im...
journal_title:Yonsei medical journal
pub_type: 历史文章,杂志文章,评审
doi:10.3349/ymj.2008.49.6.891
更新日期:2008-12-31 00:00:00
abstract::The infusion and persistence in a transplant recipient of donor-derived bone marrow cells (DBMC) of multi-lineage can lead to a state of permanent chimerism. In solid vascular organ transplantation, the donor bone marrow lineage cells can even be derived from the transplant organ, and these cells can be detected in ve...
journal_title:Yonsei medical journal
pub_type: 杂志文章,评审
doi:10.3349/ymj.2004.45.6.998
更新日期:2004-12-31 00:00:00
abstract::Campylobacter fetus subsp. fetus is a rare human pathogen, but can cause serious extraintestinal infections. Effective antimicrobial agent is required for the therapy, but we have very limited knowledge on the susceptibility of the organism. In this study, the susceptibility of 25 isolates of the organism to 14 antimi...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.1994.35.3.314
更新日期:1994-09-01 00:00:00
abstract::Dieulafoy's lesion is an uncommon cause of gastrointestinal bleeding. Hemorrhage occurs through mucosal erosion from an abnormally dilated submucosal artery. Although Dieulafoy's lesion is usually located in the stomach, it may occur anywhere in the gastrointestinal tract. We report here on a case of jejunal Dieulafoy...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2005.46.3.445
更新日期:2005-06-30 00:00:00
abstract::As the Korean government's recognition of the importance of hospice service grows, the government has initiated a variety of hospice services in Korea. Each hospice organization has shown a significant difference in its health care delivery methods, constitution and care content. Developing a clinical protocol is esse...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2005.46.1.8
更新日期:2005-02-28 00:00:00
abstract::The clinicopathological features of 9 cases of Kimura's disease and 5 cases of epithelioid hemangioma(EH) were reviewed. Patients with Kimura's disease presented with multiple or solitary large tumors occurring in the thigh, arms as well as parotid gland. Histologically, the lesions were characterized by numerous lymp...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.1990.31.3.205
更新日期:1990-09-01 00:00:00
abstract::We measured plasma levels of fibrinogen degradation products (FgDP) with newly developed enzyme-linked immunosorbent assay based on monoclonal antibody to assess the fibrinogenolytic state in 52 patients with various liver diseases (27 patients with liver cirrhosis, 10 with chronic hepatitis, 7 with acute hepatitis, 6...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.1993.34.3.234
更新日期:1993-09-01 00:00:00
abstract::Presently, allergy diagnosis and therapy procedures are undergoing a transition phase in which allergen extracts are being step-by-step replaced by molecule-based products. The new developments will allow clinicians to obtain detailed information on sensitization patterns, more accurate interpretation of allergic symp...
journal_title:Yonsei medical journal
pub_type: 杂志文章,评审
doi:10.3349/ymj.2014.55.4.839
更新日期:2014-07-01 00:00:00
abstract::This study was performed to investigate the effect of peritoneal glucose load on plasma leptin concentrations in the continuous ambulatory peritoneal dialysis (CAPD) performed on 13 non-diabetic ESRD patients. Plasma leptin and insulin concentrations were measured for 2 hours during a single 2 liter exchange of 1.5% g...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2000.41.4.485
更新日期:2000-08-01 00:00:00
abstract::Gastrointestinal stromal tumors (GISTs) are rarely noted in association with neurofibromatosis-1 (NF-1, von Recklinghausen disease) as an individual gastrointestinal manifestation. We report here a case of multiple GISTs with an abundant skeinoid fiber in the jejunum of a 43-year-old woman diagnosed as NF-1. Histologi...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2004.45.3.564
更新日期:2004-06-30 00:00:00
abstract::Although primary cardiac lymphoma was a near fatal disease in the past, recent advances in imaging diagnosis and chemotherapy have dramatically improved survival. We describe the CT and MR findings of primary cardiac lymphoma in two immunocompetent subjects who recovered after chemotherapy. The primary cardiac lymphom...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2001.42.4.451
更新日期:2001-08-01 00:00:00
abstract::Many features of the developing nervous system are visible from external observations of intact human embryos. In this study, a photographic atlas from the 4th to the 7th week after ovulation (Carnegie stages 10-18) is provided. The neural folds began to fuse at stage 10, and the rostral and caudal neuropore were clos...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.1997.38.1.26
更新日期:1997-02-01 00:00:00
abstract:PURPOSE:This study aimed to elucidate which echocardiographic criteria at three time points, for cardiac resynchronization therapy (CRT) response, are accurate in discriminating the hierarchical clinical composite end point (HCCEP). MATERIALS AND METHODS:We included 120 patients (age, 66.1±12.6 years; men, 54.2%) who ...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2019.60.1.48
更新日期:2019-01-01 00:00:00
abstract:PURPOSE:The association of interleukin-10 (IL-10) polymorphisms (-1082G/A, -819C/T, -592A/C) and interleukin-6 (IL-6) poly-morphisms (-174G/C) with tuberculosis (TB) risk has been widely reported. However, the results are controversial. To clarify the role of these polymorphisms in TB, we performed a meta-analysis of a...
journal_title:Yonsei medical journal
pub_type: 杂志文章,meta分析
doi:10.3349/ymj.2015.56.5.1274
更新日期:2015-09-01 00:00:00
abstract:PURPOSE:Data comparing the clinical benefits of medical treatment with those of percutaneous coronary intervention (PCI) in an elderly population with angina pectoris are limited. Therefore, we evaluated the efficacy of elective PCI versus optimal medical treatment (OMT) in elderly patients (between 75 and 84 years old...
journal_title:Yonsei medical journal
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.3349/ymj.2016.57.2.382
更新日期:2016-03-01 00:00:00
abstract:PURPOSE:To introduce a new simple technique using suture anchors and ceramic spacers to stabilize the elevated laminae in open-door cervical laminoplasty. Although ceramic spacers were placed in the opened laminae and fixed with nylon threads in this series, it was occasionally difficult to fix the nylon threads to the...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2015.56.6.1651
更新日期:2015-11-01 00:00:00
abstract:PURPOSE:The aim of this study was to investigate noninfectious complications of peritoneal dialysis (PD), including mechanical and metabolic complications, at a single center in Korea. MATERIALS AND METHODS:We analyzed data from 60 PD patients aged ≤18 years (40 boys and 20 girls) during the period between 1986 and 20...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2015.56.5.1359
更新日期:2015-09-01 00:00:00
abstract:PURPOSE:Spontaneous bacterial peritonitis (SBP) frequently develops in patients with liver cirrhosis; however, there is little data to suggest whether the acquisition site of infection influences the prognosis. This study compared the bacteriology, clinical characteristics and treatment outcomes of community-acquired S...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2012.53.2.328
更新日期:2012-03-01 00:00:00
abstract:PURPOSE:Tenofovir disoproxil fumarate (TDF) is commonly prescribed as a fixed-dose, co-formulated antiretroviral drug for HIV-1 infection. The major concern of long-term TDF use is renal dysfunction. However, little is known about the long-term patterns of changes in renal function in HIV-infected Koreans receiving TDF...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2017.58.4.770
更新日期:2017-07-01 00:00:00
abstract::Calcineurin Inhibitors (CNIs) and Corticosteroids have been the main immunosuppressive agents in solid organ transplantation. Many studies have confirmed the positive impacts of withdrawal/avoidance of these agents, separately, on their side effect profiles. A pilot study was performed avoiding both agents among low-i...
journal_title:Yonsei medical journal
pub_type: 临床试验,杂志文章
doi:10.3349/ymj.2004.45.6.1143
更新日期:2004-12-31 00:00:00
abstract::The inactivation of p53 and p105RB by viral proteins or by mutations plays a key role in the oncogenesis of cervical carcinoma. The E6 and E7 proteins of HPV type 16 can bind to p53 and p105RB tumor suppressor gene products, respectively. In the present study, we tested a simple in vivo model that could explain the in...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.1995.36.3.287
更新日期:1995-07-01 00:00:00
abstract:PURPOSE:Activation of the innate immune system and chronic low-grade inflammation are thought to be involved in the pathogenesis of atherosclerosis and also thought to be associated with type 2 diabetes and its complications. As a receptor for bacterial lipopolysaccharide and heat-shock proteins, Toll-like receptor 4 (...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2008.49.1.58
更新日期:2008-02-29 00:00:00
abstract::Since the Gordius worm is a parasite of crickets and several arthropods, cases of humans infected with this worm have been rare and accidental. A Gordius worm was obtained from a three-year-old girl who consulted a local clinic in Gwangju, Kyunggi-do, Korea. She lived in a rural area, and had eaten an insect that look...
journal_title:Yonsei medical journal
pub_type: 杂志文章,评审
doi:10.3349/ymj.2003.44.3.557
更新日期:2003-06-30 00:00:00
abstract:PURPOSE:Obstructive sleep apnea (OSA) is considered an independent risk factor for hypertension. However, it is still not clear which clinical factors are related with the presence of hypertension in OSA patients. We aimed to find different physical features and compare the sleep study results which are associated with...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2014.55.5.1310
更新日期:2014-09-01 00:00:00
abstract::Although nitric oxide (NO) plays an important role in the pathophysiological process of cerebral ischemia or severe traumatic brain injury, its contribution to the pathogenesis of moderate diffuse axonal injury (mDAI) remains to be clarified. The alterations in nitric oxide synthase (NOS) activity and the histopatholo...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2001.42.5.518
更新日期:2001-10-01 00:00:00
abstract:PURPOSE:Since 1993, Koreans have used diagnostic criteria set by the Korean Society on Thrombosis and Hemostasis (KSTH) in the diagnosis of overt disseminated intravascular coagulation (DIC). In 2001, the Scientific and Standardization Committee (SCC) of the International Society on Thrombosis and Hemostasis (ISTH) pro...
journal_title:Yonsei medical journal
pub_type: 杂志文章
doi:10.3349/ymj.2007.48.4.595
更新日期:2007-08-31 00:00:00
abstract:PURPOSE:A meta-analysis of empirical studies performed in Korea was conducted to systematically investigate the associations between the indices of Internet addiction (IA) and psychosocial variables. MATERIALS AND METHODS:Systematic literature searches were carried out using the Korean Studies Information Service Syst...
journal_title:Yonsei medical journal
pub_type: 杂志文章,meta分析
doi:10.3349/ymj.2014.55.6.1691
更新日期:2014-11-01 00:00:00