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Accuracy of Methods for Urinary Detection in Women with Stress Urinary Incontinence
정해도,이훈재,정연구,성도환,윤상민,이택 대한비뇨의학회 2010 Investigative and Clinical Urology Vol.51 No.8
Purpose: We assessed the accuracy of urinary detection by visualization compared with a method using the urethral channel of a transurethral, three-channel urodynamic catheter. Materials and Methods: This was a case series of 52 patients presenting with stress urinary incontinence over 2 years. Patients underwent video-urodynamic studies in both the supine and the erect positions by use of two techniques for measuring leak point pressure (LPP) by one examiner. LPP was determined as the intravesical pressure simultaneous to the starting point of urethral pressure changes through the urethral channel of a urodynamic catheter (LPP-ure) and then by visualization (LPP-vis) during different events. We also measured the time related to the provocations and the time to mark the leakage on the urodynamic machine by the examiner. Results: The LPP-ure values (cough supine: 42.1±18.7, cough erect: 42.1±21.8, Valsalva supine: 42.2±23.3, Valsalva erect: 41.0±22.6 cmH2O) were significantly lower than the LPP-vis values (89.9±29.4, 97.4±30.4, 70.6±25.2, and 74.4±32.6 cmH2O, respectively, all p<0.001). Whereas the actual leakages happened during the pressure increases, urodynamic recording by visualization was done after those increases had finished. Conclusions: The use of visualization as a urinary detection method entails potential errors that cannot be adjusted for on that time scale. Our results emphasize the need to standardize the methodologies used for urinary leakage detection, because this measurement is closely related to the accuracy of measurement of leak point pressure.
슬러리 캐스팅과 흡인주조기술을 이용한 알루미늄 금형의 쾌속제작
정해도,배원병 한국주조공학회 2000 한국주조공학회지 Vol.20 No.4
The RP&M (Rapid prototyping and Manufacturing) is the most appropriate technology for the small-lot production system, in which the production cycle is getting shorter owing to various needs from consumers. In this paper, RP&M is applied to a casting process. A casting process has a merit of being able to reflect complicated shapes at one time. But it has not been applied to the precision industry because of bad quality on surface. So we will improve characteristics of aluminum casting process using vacuum sealed casting process and porous ceramic mold which is made by slurry casting process.
정해도,문영준,Ahmad J. Almujalhem,Ali Abdullah Alqahtani,Mohammed Ali Alkhureeb,이주용 연세대학교의과대학 2022 Yonsei medical journal Vol.63 No.5
Purpose: This study presents our initial experience with endoscopic combined intrarenal surgery (ECIRS) for large renal stonesand compares the results of a propensity score-matched cohort of patients undergoing shock-wave lithotripsy (SWL). Materials and Methods: A total of 100 adults underwent ECIRS for renal stones between August 2017 and January 2019. For comparison,2172 patients who underwent a first session of SWL between January 2005 and May 2018 were included in the SWL cohort. Propensity score matching was performed using maximal stone length (MSL), mean stone density (MSD), and stone heterogeneityindex (SHI) scores. Stone-free rate (SFR) and success rate were compared between ECIRS and SWL. Results: In the ECIRS group, the mean MSL, mean MSD, and mean SHI were 28.7±15.2 mm, 1013.9±360.0 Hounsfield units (HU),209.4±104.0 HU, respectively. The SFR was 70%, and the success rate was 82.0% in this group. Although the ECIRS group had larger,harder, and more homogeneous stones than the SWL group, ECIRS showed a higher SFR and success rate than SWL. After propensity-score matching, SFR and success rate remained higher with ECIRS than with SWL (both, p<0.001). In multivariate logistic regression,smaller stone size [odds ratio (OR): 0.947, 95% confidence interval (CI): 0.913–0.979, p=0.002] and lower Seoul NationalUniversity Renal Stone Complexity score (OR: 0.759, 95% CI: 0.610–0.935, p=0.011) were independent predictors of successful ECIRS. Conclusion: ECIRS showed a higher SFR and success rate than SWL for large renal stones. Smaller stone size and lower complexityof stones were associated with a higher likelihood of successful ECIRS.
정해도,이주용,강동혁,고경태,고동훈,권오성,구교철,김광택,김명수,김범수,김현우,박주현,방우진,오경진,윤영은,이기수,이동섭,이상협,이승수,이헌주,정원호,조대성,조성용,추민수,최재영,최태수,한덕현,한병규,전승현,백성현,서일영,김형준 대한비뇨의학회 2023 Investigative and Clinical Urology Vol.64 No.4
This article provides evidence-based recommendations and expert opinions to aid urologists in making optimal decisions regarding managing urolithiasis in various clinical scenarios. The most frequently asked questions by urologists in their clinical practice have been collected and answered in the form of FAQs; based on the latest evidence and expert opinions. The natural history of urolithiasis is divided into active treatment and silent phases, with the active treatment stage divided into typical and special situations and peri-treatment management. The authors address 28 key questions, offering practical guidance for the proper diagnosis, treatment, and prevention of urolithiasis in clinical practice. This article is expected to be served as a valuable resource for urologists.
정해도,서일영,이주용 대한비뇨의학회 2021 Investigative and Clinical Urology Vol.62 No.4
Purpose: To evaluate the characteristics of urinary stone composition in a Korean population using a large database of stone composition. Materials and Methods: From January 1, 2014, to June 30, 2019, a total of 33,078 urinary stone composition data were analyzed. Stone composition was classified into four main groups: calcium oxalate (CaOx), struvite, uric acid (UA), and calcium phosphate (CaP). We examined the relationship between stone composition and sex, age, geographic region, calendar month, and season. Results: The CaOx group (46.41%) was the largest, followed by the struvite group (29.66%), UA group (19.61%), and CaP group (4.32%). The CaOx group tended to decrease with age, but the UA group increased with age. Also, the CaOx group had the highest percentage in summer and the lowest in spring (p<0.001). The struvite and CaP groups had higher percentages of females than males (struvite: 36.6% vs. 25.7%, p<0.001; CaP: 6.2% vs. 3.3%, p<0.001). Conversely, the UA stones were more common in males than in females (24.5% vs. 11.0%, p<0.001). The UA group had the lowest percentage in the capital region (p<0.001). The total male-to-female ratio decreased over time from 1.95:1 in 2014 to 1.67:1 in 2018 (p<0.001). Conclusions: There were differences for each stone composition in the percentages according to sex, age, geographic region, month, and season. Identifying these differences based on the stone composition is vital for the treatment and prevention of urinary stones.