PURPOSE: The aim of this study was to evaluate the effectiveness and indication of radiofrequency ablation(RFA) using renal VX2 tumors by implantation of VX2 tumor cells under the renal capsule in rabbits. MATERIALS AND METHODS: Ten rabbits were injected with 30-40microliter VX2 tumor cells(1.2x10(7) viable cells/ml) under the renal capsule of the right kidney by right subcostal incision. On the 14th day after the tumor cells were implanted, we checked for the development of renal tumors, and the sizes and shapes(exophytic or central) of the tumors by the use of computed tomography. We performed RFA in the renal VX2 tumors with a 17G StarBurst electrode through kidney exposure. After the first and third day following RFA, renal function was checked. On the third day, we performed CT and harvested the kidneys for gross and microscopic evaluation. RESULTS: We confirmed the development of renal VX2 tumors in nine cases. Tumor shapes were exophytic in seven cases and central in two cases; the mean size of the tumors was 2.1 cm(range, 1.1-3.8cm). In all tumors, RFA was performed. From the use of enhanced CT after RFA on the third day, all of the lesions treated with RFA showed no enhancement. From the pathological findings, coagulative necroses were seen on all of the lesions treated with RFA. The necrotized tumor size after RFA was not different statistically as measured by CT and a pathological examination (p=0.833) CONCLUSIONS:: In centrally located renal tumors, we experienced thermal injury in pelvocalyceal systems. RFA is an effective method for nephron sparing surgery as the tumor cells completely disappear and there is preserved renal function and the procedure is easy to apply. We suggest that the RFA method for exophytic renal tumors is more effective than other procedures.
Rabbits ; Animals

No abstract available.
Brain* ; Child* ; Humans ; Nervous System Diseases*

BACKGROUND: We studied the hemodynamic changes associated with steep Trendelenburg position and prolonged pneumoperitoneum during robot-assisted laparoscopic prostatectomy in elderly patients with cardiac diseases. METHODS: Hemodynamic variables were measured at baseline supine position, at 30 min, 1, 2, 3 and 4 h during CO2 insufflation in post-Trendelenburg position, and after deflation in the supine position. RESULTS: In comparison with normal subjects, the cardiac index and systemic vascular resistance index of patients with cardiac diseases were significantly affected by the Trendelenburg position and pneumoperitoneum (P < 0.001). However, other variables of heart rate, mean arterial pressure and central venous pressure were not differed between the groups. CONCLUSIONS: We conclude that attention should be paid to maintain adequate hemodynamic status during prolonged pneumoperitoneum in the Trendelenburg position, and which is unfeasible in patients with severe heart failure and unstable angina.
Aged ; Angina, Unstable ; Arterial Pressure ; Central Venous Pressure ; Head-Down Tilt ; Heart Diseases ; Heart Failure ; Heart Rate ; Hemodynamics ; Humans ; Insufflation ; Pneumoperitoneum ; Prostatectomy ; Supine Position ; Vascular Resistance

Septic arthritis of the hip is rarely caused by Mycoplasma hominis. It rarely develops in a patient during the postpartum period. However, delayed treatment of septic arthritis of the hip may lead to serious sequelae; therefore, it is important for clinicians not to overlook patients with the disease. This case illustrates the clinical steps in diagnosis and treatment of M. hominis septic arthritis of the hip.
Arthritis, Infectious* ; Diagnosis ; Hip* ; Humans ; Mycoplasma hominis* ; Postpartum Period*

PURPOSE: The urinary mass screening program for the detection of proteinuria had been performed for a school age population in the city of Seoul since 1981. However, systematic evaluation for this program had never been done. We, therefore, designed a systematic evaluation in corporation with the Seoul School Health Center for students with proteinuria identified in the mass screening to determine the prevalence of asymptomatic proteinuria, and to estimate the risk of incipient renal diseases and incidences of some of them. And also, we attempted to reveal the significance of urinary mass screening. METHODS: In the period of 8 years betwen 1987 and 1994, annually about a half million students, who comprised 3 different age groups, 5th grade of elementary school, 2nd grade of junior school and 2nd grade of high school were chosen, corresponding to the approximate ages of 11, 14 and 17 years, respectively. These subjects accounted for 25% of total school children in Seoul. The screening program was carried out in 3 steps. The 1st test was performed at schools and the 2nd at the School Health Center. Those students who showed proteinuria in the 1st and 2nd tests were referred to the hospital. Laboratory examinations including renal biopsies were performed in those students with pathologic proteinuria to clarify the incipient renal diseases. RESULTS: 1) The prevalences of asymptomatic proteinuria were 0.2-0.36% (average 0.28%) in the 1st test. It peaked at the age of 14 years 0.36%, compared to 0.2% in the 11 age group and 0.25% in the 17 age group. 2) There was a difference of asymptomatic proteinuria by sex and age, higher prevalence in the female in the 11 age group but higher in the male in the 17 age group. 3) The distribution of proteinuria in accordance with various types classified by us at the 3rd test showed as follows: transient proteinuria (type 1) 17%, orthostatic proteinuria (type 2) 55%, constant proteinuria (type 3) 6%, proteinuria with hematuria (type 4) 20%, isolated proteinuria (type 5) 2%. Pathologic proteinuria comprised of type 3, 4 and 5, accounted for 28%, which was 1/10 of proteinuria in the 1st test. 4) The annual incidence of renal glomerular diseases among the age goup of 7-18 years was estimated to be 2.8 per 10,000. 5) Renal pathologic studies on 80 children with proteinuria and hematuria (66) or constant proteinuria (14) revealed IgA Nephropathy (38.9%) was the most frequent glomerular diease. MPGN 10.0%, MGN 7.5%, Reflux Nephropathy 7.5%, FSGS 6.2% were followed, respectively. HBV asssociated Nephropathy was 7.5%. 6) 4 of Reflux Nephropathy and 2 of FSGS were found in the 14 children with constant proteinuria in the screening test. Among these children, 5 progressed to chronic renal failure. 7) The annual incidence of IgA Nephropathy among the age group of 7-18 years was 1.1 per 10,000. 8) The morbidity of chronic renal failure was estimated to be 9.8 per 1 million of 7 to 18 years age group. CONCLUSIONS: 1) Most Students, approximately 90%, who were found to have asymptomatic proteinuria in the initial screening were normal so clinical evaluations for them should be very much cautious. Only 10% of them had pathologic proteinuria which denoted incipient renal diseases. 2) Annual incidences of incipient renal glomerular diseases, IgA Nephropathy and chronic renal failure were estimated to be 2.8 per 10,000, 1.1 per 10,000 and 9.8 per 1 million among school children in Seoul. 3) Because of the high incidence of significant glomerular changes and the high rate of progression to chronic renal failure in children with constant proteinuria, it should be regarded as serious one. 4) The definite conclusion that a urinary mass screening program can alter the prognosis of children with renal diseases identified in the mass screening can not be drawn with this study. Further study must be necessary.
Biopsy ; Child* ; Female ; Glomerulonephritis, IGA ; Glomerulonephritis, Membranoproliferative ; Hematuria ; Humans ; Incidence ; Kidney Failure, Chronic ; Male ; Mass Screening* ; Prevalence ; Prognosis ; Proteinuria ; School Health Services ; Seoul*

Background/Aims: Comparative occurrence of ischemic stroke for rhythm versus rate control strategy in patients with non-valvular atrial fibrillation (NVAF) is still inconclusive. The purpose of this study was to investigate whether the rhythm control strategy is associated with a lower risk of ischemic stroke compared to the rate control strategy in NVAF patients. Methods: The CODE-AF registry prospectively enrolled 6,280 consecutive patients who were treated for NVAF at 10 tertiary referral centers in South Korea. Of these, 2,513 NVAF patients (age, 67 ± 10 years; male, 61.8%) were clinically followed up for over 1-year and divided into rate and rhythm control groups. Results: Those treated with the rhythm control strategy were younger and had less proportions of underlying disease compared to those treated with the rate control strategy. After the propensity matching analysis, those treated with the rhythm control strategy had similar baseline characteristics including the CHA 2 DS 2 -VASC score compared to those treated with the rate control strategy.The rate of oral anticoagulation, all bleeding, and hospitalization were also similarly between the two groups. The incidence rate of ischemic stroke in the rhythm control group was significantly lower than in the rate control group (0.7 vs. 6.9 per 1,000 person-years, p = 0.011). Conclusions The rhythm control strategy demonstrated a beneficial effect to lower the risk of ischemic stroke during a 1-year follow-up compared to the rate control strategy.

Background and Objectives: Atherectomy as a pretreatment has the potential to improve the outcomes of drug-coated balloon (DCB) treatment by reducing and modifying atherosclerotic plaques. The present study investigated the outcomes of atherectomy plus DCB (A+DCB) compared with DCB alone for the treatment of femoropopliteal artery disease. Methods: A total of 311 patients (348 limbs) underwent endovascular therapy using DCB for native femoropopliteal artery lesions at two endovascular centers. Of these, 82 limbs were treated with A+DCB and 266 limbs with DCB alone. After propensity score matching based on clinical and lesion characteristics, a total of 82 pairs was compared for immediate and mid-term outcomes. Results: For the matched study groups, the lesion length was 172.7±111.2 mm, and severe calcification was observed in 43.3%. The technical success rate was higher in the A+DCB group than in the DCB group (80.5% vs. 62.2%, p=0.015). However, the A+DCB group showed more procedure-related minor complications (37.0% vs. 13.4%, p=0.047). At 2-year follow-up, primary clinical patency (73.8% vs. 82.6%, p=0.158) and the target lesion revascularization (TLR)-free survival (84.3% vs. 88.2%, p=0.261) did not differ between the two groups. In Cox proportional hazard analysis, atherectomy showed no significant impact on the outcome of DCB treatments. Conclusions The pretreatment with atherectomy improved technical success of DCB treatment; however, it was associated with increased minor complications. In this study, A+DCB showed no clinical benefit in terms of TLR-free survival or clinical patency compared with DCB treatment alone.

Background and Objectives: Endovascular therapy (EVT) first strategy has been widely adopted for the treatment of chronic limb threatening ischemia (CLTI) patients in realworld practice. This study aimed to investigate long-term outcomes of CLTI patients who underwent EVT and identify prognostic factors. Methods: From the retrospective cohorts of a Korean multicenter endovascular therapy registry, 1,036 patients with CLTI (792 men, 68.8 ± 9.5 years) were included. The primary endpoint was amputation-free survival (AFS) defined as the absence of major amputation or death. Secondary endpoints were major adverse limb events (MALE; a composite of major amputation, minor amputation, and reintervention). Results: Five-year AFS and freedom from MALE were 69.8% and 61%, respectively. After multivariate analysis, age (hazard ratio [HR], 1.476; p<0.001), end-stage renal disease (ESRD; HR, 2.340; p<0.001), Rutherford category (RC) 6 (HR, 1.456; p=0.036), and suboptimal EVT (HR, 1.798; p=0.005) were identified as predictors of major amputation or death, whereas smoking (HR, 0.594; p=0.007) was protective. Low body mass index (HR, 1.505; p=0.046), ESRD (HR, 1.648; p=0.001), femoropopliteal lesion (HR, 1.877; p=0.004), RC-6 (HR, 1.471;p=0.008), and suboptimal EVT (HR, 1.847; p=0.001) were predictors of MALE. The highest hazard rates were observed during the first 6 months for both major amputation or death and MALE. After that, the hazard rate decreased and rose again after 3–4 years. Conclusions In CLTI patients, long-term outcomes of EVT were acceptable. ESRD, RC-6, and suboptimal EVT were common predictors for poor clinical outcomes.

Considerable evidence has been published since the 2020 Korean Cardiopulmonary Resuscitation Guidelines were reported. The International Liaison Committee on Resuscitation (ILCOR) also publishes the Consensus on CPR and Emergency Cardiovascular Care Science with Treatment Recommendations (CoSTR) summary annually. This review provides expert opinions by reviewing the recent evidence on CPR and ILCOR treatment recommendations. The authors reviewed the CoSTR summary published by ILCOR in 2021 and 2022. PICO (population, intervention, comparator, outcome) questions for each topic were reviewed using a systemic or scoping review methodology. Two experts were appointed for each question and reviewed the topic independently. Topics suggested by the reviewers for revision or additional description of the guidelines were discussed at a consensus conference. Forty-three questions were reviewed, including 15 on basic life support, seven on advanced life support, two on pediatric life support, 11 on neonatal life support, six on education and teams, one on first aid, and one related to coronavirus disease 2019 (COVID-19). Finally, the current Korean CPR Guideline was maintained for 28 questions, and expert opinions were suggested for 15 questions.

Background: and Purpose Previous research on patients with acute ischemic stroke (AIS) has shown a 0.5% incidence of major gastrointestinal bleeding (GIB) requiring blood transfusion during hospitalization. The existing literature has insufficiently explored the long-term incidence in this population despite the decremental impact of GIB on stroke outcomes. Methods: We analyzed the data from a cohort of patients with AIS admitted to 14 hospitals as part of a nationwide multicenter prospective stroke registry between 2011 and 2013. These patients were followed up for up to 6 years. The occurrence of major GIB events, defined as GIB necessitating at least two units of blood transfusion, was tracked using the National Health Insurance Service claims data. Results: Among 10,818 patients with AIS (male, 59%; mean age, 68±13 years), 947 (8.8%) experienced 1,224 episodes of major GIB over a median follow-up duration of 3.1 years. Remarkably, 20% of 947 patients experienced multiple episodes of major GIB. The incidence peaked in the first month after AIS, reaching 19.2 per 100 person-years, and gradually decreased to approximately one-sixth of this rate by the 2nd year with subsequent stabilization. Multivariable analysis identified the following predictors of major GIB: anemia, estimated glomerular filtration rate <60 mL/min/1.73 m2 , and a 3-month modified Rankin Scale score of ≥4. Conclusion Patients with AIS are susceptible to major GIB, particularly in the first month after the onset of AIS, with the risk decreasing thereafter. Implementing preventive strategies may be important, especially for patients with anemia and impaired renal function at stroke onset and those with a disabling stroke.