Risk Factors of Salvage Procedure for Refractory Morcellation During Holmium Laser Enucleation of the Prostate / 대한배뇨장애요실금학회지

Purpose@#We aimed to identify the risk factors for salvage procedure (SP) required for refractory adenomatous tissue resistant to morcellation during holmium laser enucleation of the prostate (HoLEP). @*Methods@#Patients who underwent HoLEP between January 2010 and April 2020 at Seoul National University Hospital were analyzed. SPs were defined as cases of conversion to resection of the prostatic tissue using an electrosurgical loop after morcellation or secondary morcellation a few days after surgery or conversion to open cystotomy. @*Results@#Among a total of 2,427 patients, 260 were identified as having SP (SP group) (transurethral resection-nodule [n = 250, 96.1%], secondary morcellation a few days after surgery [n = 9, 3.5%], and conversion to open cystotomy [n = 1, 0.4%]). Patients in the SP group were older and had higher 5-α reductase inhibitors use, higher prostate-specific antigen, larger total prostate volume, and larger transition zone volume (TZV) than those in the non-SP group. In the multivariable logistic regression analysis, only age and TZV were associated with SP. Compared to 40s and 50s, the odds ratios (ORs) were 3.84 in 60s (95% confidence interval [CI] 1.37–10.78, P = 0.011), 4.53 in 70s (95% CI, 1.62–12.62, P = 0.004), and 6.59 in 80s or older (95% CI, 2.23–19.46, P = 0.001). The ORs of the SP were analyzed per TZV quartile. Compared to TZV ≤ 20.3 mL, the OR was 3.75 in 32.0 mL 60 years or those with TZV > 32 mL. In order to more efficiently remove these resistant adenomas, it is necessary to develop more efficient morcellators in the future.

Risk Factors for Transurethral Coagulation for Hemostasis During Holmium Laser Enucleation of the Prostate / 대한배뇨장애요실금학회지

Purpose@#We aimed to identify risk factors for transurethral coagulation (TUC) using bipolar electrocautery for hemostasis during holmium laser enucleation of the prostate (HoLEP) surgery for benign prostatic hyperplasia (BPH). @*Methods@#We analyzed the clinical outcomes of HoLEP surgery performed by a single surgeon between January 2010 and April 2020 at the Seoul National University Hospital. Patient characteristics and perioperative parameters were used to identify the risk factors for TUC. The TUC group was defined as a case of conversion to hemostasis using electrocautery during the hemostasis step after enucleation. @*Results@#Of 1,563 patients, 357 underwent TUC (TUC group; 22.8%) as an adjuvant (n=299, 19.1%) or salvage (n=58, 3.7%) therapy. Patients in the TUC group were older (mean±standard deviation, 70.6±7.3 years vs. 69.3±7.0 years; P=0.002), had more 5-alpha reductase inhibitor (5-ARI) use (35.6% vs. 25.9%, P35 mL. Therefore, TUC may be potentially necessary in patients with a large transition zone volume in patients with BPH.

Maximum Voided Volume Is a Better Clinical Parameter for Bladder Capacity Than Maximum Cystometric Capacity in Patients With Lower Urinary Tract Symptoms/Benign Prostatic Hyperplasia: A Prospective Cohort Study / 대한배뇨장애요실금학회지

Purpose@#Bladder capacity is an important parameter in the diagnosis of lower urinary tract dysfunction. We aimed to determine whether the maximum bladder capacity (MCC) measured during a urodynamic study was affected by involuntary detrusor contraction (IDC) in patients with Lower Urinary Tract Symptoms (LUTS)/Benign Prostatic Hyperplasia (BPH). @*Methods@#Between March 2020 and April 2021, we obtained maximum voided volume (MVV) from a 3-day frequency-volume chart, MCC during filling cystometry, and maximum anesthetic bladder capacity (MABC) during holmium laser enucleation of the prostate under spinal or general anesthesia in 139 men with LUTS/BPH aged >50 years. Patients were divided according to the presence of IDC during filling cystometry. We assumed that the MABC is close to the true value of the MCC, as it is measured under the condition of minimizing neural influence over the bladder. @*Results@#There was no difference in demographic and clinical characteristics between the non-IDC (n=20) and IDC groups (n=119) (mean age, 71.5±7.4) (P>0.05). The non-IDC group had greater bladder volume to feel the first sensation, first desire, and strong desire than the IDC group (P<0.001). In all patients, MABC and MVV were correlated (r=0.41, P<0.001); however, there was no correlation between MCC and MABC (r=0.19, P=0.02). There was no significant difference in MABC between the non-IDC and IDC groups (P=0.19), but MVV and MCC were significantly greater in the non-IDC group (P<0.001). There was no significant difference between MABC and MVV (MABC-MVV, P=0.54; MVV/MABC, P=0.07), but there was a significant difference between MABC and MCC between the non-IDC and IDC groups (MABC-MCC, P<0.001; MCC/MABC, P<0.001). @*Conclusions@#Maximum bladder capacity from a urodynamic study does not represent true bladder capacity because of involuntary contractions.

Translation and Linguistic Validation of Korean Version of the Expanded Prostate Cancer Index Composite for Clinical Practice for Patients With Prostate Cancer / 대한배뇨장애요실금학회지

Purpose@#Advances in the diagnosis and treatment of prostate cancer have increased the patients’ stress level and decreased the quality of life. A variety of instruments are currently available to evaluate patients with prostate cancer. However, only a few tools are available to assess Korean patients, and therefore we demonstrated a linguistic validation of Korean Expanded Prostate Cancer Index Composite for Clinical Practice (EPIC-CP). @*Methods@#EPIC-CP was translated into Korean and the linguistic validation was evaluated. The evaluation process includes permission for translation, forward translation, reconciliation, backward translation, cognitive debriefing, and proofreading. Two bilingual translators independently translated the original questionnaire, discussed the feasibility and naturalness of initial translation, followed by revision to the reconciled version. Another translator then performed a backward translation into English. Ten patients with prostate cancer completed the translated questionnaire and performed cognitive debriefing. @*Results@#The original EPIC-CP was translated into 2 Korean versions. The different wording in both versions and the ordinary words in the initial translations were changed considering the nuances and meanings of medical terms. During the backward translation, the panels made slight changes to clarify the meaning and nuances of the translated questionnaire. During cognitive debriefing, 10 patients answered the questionnaire and offered their opinions regarding comprehensibility and naturalness. Most patients agreed that the translation was comprehensible in general. @*Conclusions@#Our study provides a successful linguistic validation of the EPIC-CP questionnaire. The translation is a helpful diagnostic tool to ensure the quality of life of patients with prostate cancer attending crowded clinics.

Comprehensive Review of Effective Application of Questionnaires for Clinical Research on Lower Urinary Tract Symptoms With Translation and Cultural Adaptation to the Korean Language / 대한배뇨장애요실금학회지

Lower urinary tract symptoms are highly prevalent and closely related to patients’ quality of life. Clinical research on urologic disease is essential for accumulating evidence on patient management; however, the major obstacle is converting patients’ subjective symptoms to objective parameters. The optimal application of well-developed and validated questionnaires is vital in achieving objectivity and minimizing bias in clinical research. Numerous questionnaires for measuring symptoms and quality of life in urologic diseases have been developed worldwide; however, they cannot be directly used in clinical studies without validation processes. This review aimed to explain the common procedures for translation, linguistic, and psychometric validation of developed questionnaires from other languages. Furthermore, we comprehensively reviewed currently available questionnaires for evaluating lower urinary tract symptoms in the Korean population.

The Current Positioning of Augmentation Enterocystoplasty in the Treatment for Neurogenic Bladder / 대한배뇨장애요실금학회지

Augmentation enterocystoplasty (AEC) is a surgical procedure in which the bladder is enlarged using an intestinal segment in patients with lower urinary tract dysfunction who fail to achieve satisfactory results with all conservative treatments. Currently, surgical materials and procedures, concomitant correction of upper urinary tract abnormalities, or bladder neck reconstruction may vary depending on the experience and preferences of the surgeons. AEC has been proven to be successful with respect to surgical goals, such as achieving urinary continence, improving quality of life, and preserving the upper urinary tract over the long term. The advantage of AEC over intravesical injection of botulinum toxin—a more recent and less invasive procedure—is that the prevention of upper urinary tract damage and the improvement of urinary incontinence are more reliably guaranteed, especially considering that these surgical effects are permanent. Compared to less invasive treatments, the quality of life of patients after surgery is also much higher, and AEC may be more cost-effective in the long run. Thus, in patients with neurogenic bladder, AEC is still the gold standard surgical procedure with strong evidence in support of its efficacy. In this article, the indications, surgical methods, possible complications, long-term follow-up, and current positioning of AEC in lower urinary tract dysfunction is discussed.

Korean Translation and Linguistic Validation of Urgency and Overactive Bladder Questionnaires / 대한배뇨장애요실금학회지

Purpose@#Given the importance of evaluating the severity of overactive bladder (OAB) symptoms and outcomes after treatment, several questionnaires have been developed to evaluate OAB patients. However, only limited questionnaires are available in Korea for use with Korean patients. Therefore, this study aimed to develop Korean versions of OAB questionnaires through a rigorous linguistic validation process. @*Methods@#The Indevus Urgency Severity Scale, Urgency Perception Scale, Urgency Severity Scale, and Patient Perception of Intensity of Urgency Scale underwent translation and linguistic validation. The linguistic validation procedure consisted of permission for translation, forward translations, reconciliation, back-translation, cognitive debriefing, and proofreading. Two independent bilingual translators translated the original version of each questionnaire, and a panel then discussed and reconciled the 2 initial translations. Next, a third independent bilingual translator performed a backward translation of the reconciled version into English. Five Korean patients diagnosed with OAB were interviewed for cognitive debriefing. @*Results@#Each item of the questionnaires was translated into 2 Korean versions in the forward translation process. Terms such as ‘urgency’ and ‘wetting’ were translated into ordinary language by the translators and adjusted by the panel members to more conceptually equivalent terms in a medical context. In the back-translation process, the panel made a few changes regarding details based on a comparison of the back-translated and original versions. During the cognitive debriefing process, 5 patients provided a few pieces of feedback on the naturalness of the wording of the questionnaires, but generally agreed on the translated terms. @*Conclusions@#In this study, the panel produced a successful linguistic validation of Korean versions of multiple OAB questionnaires, which can be utilized to evaluate the severity and treatment outcomes of OAB.

Comprehensive Review of Effective Application of Questionnaires for Clinical Research on Lower Urinary Tract Symptoms With Translation and Cultural Adaptation to the Korean Language / 대한배뇨장애요실금학회지

Lower urinary tract symptoms are highly prevalent and closely related to patients’ quality of life. Clinical research on urologic disease is essential for accumulating evidence on patient management; however, the major obstacle is converting patients’ subjective symptoms to objective parameters. The optimal application of well-developed and validated questionnaires is vital in achieving objectivity and minimizing bias in clinical research. Numerous questionnaires for measuring symptoms and quality of life in urologic diseases have been developed worldwide; however, they cannot be directly used in clinical studies without validation processes. This review aimed to explain the common procedures for translation, linguistic, and psychometric validation of developed questionnaires from other languages. Furthermore, we comprehensively reviewed currently available questionnaires for evaluating lower urinary tract symptoms in the Korean population.

Recent Updates in Urinary Catheter Products for the Neurogenic Bladder Patients with Spinal Cord Injury / 대한신경손상학회지

Clean intermittent catheterization (CIC) is one of the core elements of neurogenic bladder management in the patients with spinal cord injury and is effective and safe to maintain low intra-bladder pressure and achieve urinary continence. Until now, the most notable development in urinary catheter products for CIC is the introduction of hydrophilic coating. Fortunately, in Korea, the national medical insurance has recently covered the cost for urinary catheters in this patient group. The purpose of this review is to summarize the history of CIC and the recent development of urinary catheter products. From our review, we would like to suggest a way of thinking that is the way forward for the future to improve the implementation of CIC with minimal morbidity.

Linguistic Validation of the Intermittent Self-catheterization Questionnaire for Patients With Neurogenic Bladder Who Perform Intermittent Catheterization for Voiding Dysfunction / 대한배뇨장애요실금학회지

PURPOSE: In recent years, the importance of patient satisfaction and quality of life—referred to as patient-related outcomes— has been emphasized, in addition to the evaluation of symptoms and severity through questionnaires. However, the questionnaires that can be applied to Korean patients with neurogenic bladder are limited. Therefore, the current study linguistically validated the Intermittent Self-Catheterization Questionnaire (ISC-Q) as an instrument to evaluate the quality of life of Korean patients with neurogenic bladder who regularly perform clean intermittent catheterization (CIC). METHODS: The validation process included permission for translation, forward translations, reconciliation, backward translation, cognitive debriefing, and proofreading. Two bilingual translators independently translated the original version of the ISC-Q into Korean and then combined the initial translations. A third bilingual translator performed a backward translation of the reconciled version into English. Five Korean-speaking patients with neurogenic bladder carried out the cognitive debriefing. RESULTS: During the forward translation process, the 24 questions of the ISC-Q were translated into 2 Korean versions. The terms used in each version were adjusted from the original version to use more conceptually equivalent expressions in Korean. During the backward translation process, several changes were involving substitutions of meaning. In the cognitive debriefing process, 5 patients were asked to complete the questionnaire. All patients agreed that the questionnaire explained their situation well. CONCLUSIONS: This study presents a successful linguistic validation of the Korean version of the ISC-Q, which could be a useful tool for evaluating treatment satisfaction in patients with neurogenic bladder performing CIC regularly.

Adherence to the Clean Intermittent Catheterization Following a Customized Intensive Education Program for Patients with Emptying Failure

PURPOSE: The purpose of this study is to investigate adherence to the clean intermittent catheterization (CIC) and influencing factors on the adherence following a customized intensive education program (CIEP). METHODS: This work is a retrospective descriptive study. The subjects were 226 emptying failure patients who learned in a CIEP from January 2012 to July 2014. The program developed in 2011 and consisted of 1) customized theoretical education; based on the results of urologic tests, underlying disease, or surgery of the patients, 2) hands-on practice until the trainees were able to master the techniques, 3) questions about the process of catheterization and what he/she needs to know. 4) at follow-up, the survey about adherence and barrier to CIC. Clinical characteristics; the level of satisfaction, understanding, and self-confidence; the barrier in medical records were reviewed. RESULTS: The short-term adherence rate (median 22 days) is 87.6% and the long-term adherence rate (median 112 days) is 50.4%. The biggest obstacle is time management. The levels of satisfaction, understanding, and self-confidence are very high. The variable of Income is the only factor that has influence on adherence. CONCLUSION: Despite the CIEP, the adherence rate is relatively low. In addition to the education, emotional and psychological supports and regular follow-up are needed to improve long-term adherence.

Efficacy of an Alpha-Blocker for the Treatment of Nonneurogenic Voiding Dysfunction in Women: An 8-Week, Randomized, Double-Blind, Placebo-Controlled Trial / 대한배뇨장애요실금학회지

PURPOSE: To evaluate the efficacy of an alpha-1 adrenergic receptor (α1-AR) blocker for the treatment of female voiding dysfunction (FVD) through a pressure-flow study. METHODS: This was a randomized, double-blind, placebo-controlled trial. Women aged ≥18 years with voiding symptoms, as defined by an American Urological Association symptom score (AUA-SS) ≥15 and a maximum flow rate (Qmax) 100 mL and/or a postvoid residual (PVR) volume >150 mL, were randomly allocated to either the alfuzosin or placebo group. After 8 weeks of treatment, changes in the AUA-SS, Bristol female lower urinary tract symptoms (BFLUTS) questionnaire, Qmax/PVR, and voiding diary were compared between groups. Patients’ satisfaction with the treatment was compared. Patients were categorized into 3 groups according to the Blaivas-Groutz bladder outlet obstruction (BOO) nomogram: none, mild, and moderate to severe. Subgroup comparisons were also made. RESULTS: Of a total of 187 women, 154 (79 alfuzosin, 75 placebo) were included in the analysis. After 8 weeks of treatment, the AUA-SS decreased by 7.0 in the alfuzosin group and by 8.0 in the placebo group. Changes in AUA-SS subscores, BFLUTS (except the I-sum), the voiding diary, and Qmax/PVR were not significantly different between groups. Approximately 54% of the alfuzosin group and 62% of the placebo group were satisfied with the treatment. No significant difference was observed between groups according to the presence or grade of BOO. CONCLUSIONS: Alfuzosin might not be more effective than placebo for treating FVD. The presence or the grade of BOO did not affect the results. A further study with sufficient power is needed to determine the efficacy of α1-AR blockers for the treatment of FVD.

Translation and Linguistic Validation of the Korean Version of the Treatment Satisfaction Visual Analogue Scale and the Overactive Bladder Satisfaction With Treatment Questionnaire / 대한배뇨장애요실금학회지

PURPOSE: This study reports the development of the Korean Version of the Treatment Satisfaction Visual Analogue Scale (TS-VAS) and the Overactive Bladder Satisfaction with Treatment Questionnaire (OAB-SAT-q) based on the original versions, with subsequent linguistic validation by Korean patients with overactive bladder receiving active treatment from a physician. METHODS: Translation and linguistic validation were performed in 2016. The validation process included permission for translation, forward translation, reconciliation, backward translation, cognitive debriefing, and proofreading. The original versions of the TS-VAS and OAB-SAT-q were independently translated into Korean by 2 bilingual translators and were then reconciled into a single version. The third bilingual translator performed a backward translation of the reconciled version into English. A trained interviewer and 5 Korean-speaking patients with OAB carried out the cognitive debriefing. RESULTS: During the forward translation process, the terms used in the 2 questionnaires were adjusted to use more appropriate expressions in the Korean language than were used in the original versions. During the backward translation process, no changes were made in terms of semantic equivalence. In the cognitive debriefing session, 5 patients were asked to fill in the answers within 8 minutes; most of them reported that the translated questions were clear and easy to understand. CONCLUSIONS: The present study presents successful linguistic validation of the Korean version of the TS-VAS and OAB-SAT-q, which could be useful tools for evaluating treatment satisfaction in patients.

Development of Decision Support Formulas for the Prediction of Bladder Outlet Obstruction and Prostatic Surgery in Patients With Lower Urinary Tract Symptom/Benign Prostatic Hyperplasia: Part I, Development of the Formula and its Internal Validation / 대한배뇨장애요실금학회지

PURPOSE: As the elderly population increases, a growing number of patients have lower urinary tract symptom (LUTS)/benign prostatic hyperplasia (BPH). The aim of this study was to develop decision support formulas and nomograms for the prediction of bladder outlet obstruction (BOO) and for BOO-related surgical decision-making, and to validate them in patients with LUTS/BPH. METHODS: Patient with LUTS/BPH between October 2004 and May 2014 were enrolled as a development cohort. The available variables included age, International Prostate Symptom Score, free uroflowmetry, postvoid residual volume, total prostate volume, and the results of a pressure-flow study. A causal Bayesian network analysis was used to identify relevant parameters. Using multivariate logistic regression analysis, formulas were developed to calculate the probabilities of having BOO and requiring prostatic surgery. Patients between June 2014 and December 2015 were prospectively enrolled for internal validation. Receiver operating characteristic curve analysis, calibration plots, and decision curve analysis were performed. RESULTS: A total of 1,179 male patients with LUTS/BPH, with a mean age of 66.1 years, were included as a development cohort. Another 253 patients were enrolled as an internal validation cohort. Using multivariate logistic regression analysis, 2 and 4 formulas were established to estimate the probabilities of having BOO and requiring prostatic surgery, respectively. Our analysis of the predictive accuracy of the model revealed area under the curve values of 0.82 for BOO and 0.87 for prostatic surgery. The sensitivity and specificity were 53.6% and 87.0% for BOO, and 91.6% and 50.0% for prostatic surgery, respectively. The calibration plot indicated that these prediction models showed a good correspondence. In addition, the decision curve analysis showed a high net benefit across the entire spectrum of probability thresholds. CONCLUSIONS: We established nomograms for the prediction of BOO and BOO-related prostatic surgery in patients with LUTS/BPH. Internal validation of the nomograms demonstrated that they predicted both having BOO and requiring prostatic surgery very well.

Development of Decision Support Formulas for the Prediction of Bladder Outlet Obstruction and Prostatic Surgery in Patients With Lower Urinary Tract Symptom/Benign Prostatic Hyperplasia: Part II, External Validation and Usability Testing of a Smartphone A / 대한배뇨장애요실금학회지

PURPOSE: We aimed to externally validate the prediction model we developed for having bladder outlet obstruction (BOO) and requiring prostatic surgery using 2 independent data sets from tertiary referral centers, and also aimed to validate a mobile app for using this model through usability testing. METHODS: Formulas and nomograms predicting whether a subject has BOO and needs prostatic surgery were validated with an external validation cohort from Seoul National University Bundang Hospital and Seoul Metropolitan Government-Seoul National University Boramae Medical Center between January 2004 and April 2015. A smartphone-based app was developed, and 8 young urologists were enrolled for usability testing to identify any human factor issues of the app. RESULTS: A total of 642 patients were included in the external validation cohort. No significant differences were found in the baseline characteristics of major parameters between the original (n=1,179) and the external validation cohort, except for the maximal flow rate. Predictions of requiring prostatic surgery in the validation cohort showed a sensitivity of 80.6%, a specificity of 73.2%, a positive predictive value of 49.7%, and a negative predictive value of 92.0%, and area under receiver operating curve of 0.84. The calibration plot indicated that the predictions have good correspondence. The decision curve showed also a high net benefit. Similar evaluation results using the external validation cohort were seen in the predictions of having BOO. Overall results of the usability test demonstrated that the app was user-friendly with no major human factor issues. CONCLUSIONS: External validation of these newly developed a prediction model demonstrated a moderate level of discrimination, adequate calibration, and high net benefit gains for predicting both having BOO and requiring prostatic surgery. Also a smartphone app implementing the prediction model was user-friendly with no major human factor issue.

The In Vivo Effect of Ytterbium-Doped Fiber Laser on Rat Buccal Mucosa as a Simulation of Its Effect on the Urinary Tract: A Preclinical Histopathological Evaluation / 대한배뇨장애요실금학회지

PURPOSE: The aim of this study was to perform a histological analysis of the effect of a ytterbium-doped fiber (YDF) laser on oral buccal mucosa tissue in vivo to simulate its effect on the mucosa of the lower urinary tract. METHODS: A total of 90 8-week-old Sprague-Dawley rats were anesthetized with urethrane (1.2 g/kg intraperitoneally). A pre-specified inner buccal mucosal site was irradiated with a YDF master-oscillator power amplifier (MOPA) system for 60 seconds, with output power settings of 0.5, 1, and 2 W, respectively, in 3 treatment groups. Specimens of irradiated tissue were harvested at 2 hours, 24 hours, 2 weeks, and 4 weeks after irradiation. The tissue specimens were stained with hematoxylin and eosin for histological analysis. RESULTS: In the group treated with 0.5 W, basal cell elongation and vacuolization were observed at 2 hours and 24 hours after treatment, respectively. No evident injury was observed after 2 or 4 weeks. The group treated with 1 W presented partial basal layer separation, and even complete epidermal ablation, within 2 hours. At 24 hours after laser treatment, new capillaries on an edematous background of fibroblasts and myofibroblasts, as well as profuse infiltration of the neutrophils to the basal layer, were observed. Collagen deposition and reepithelization were observed in specimens taken 2 weeks and 4 weeks after treatment. The group treated with 2 W presented bigger and deeper injuries at 2 hours after irradiation. Meanwhile, subepidermal bullae with full-thickness epidermal necrosis and underlying inflammatory infiltrate were observed 24 hours after treatment. The presence of fibrous connective tissue and collagen deposition were observed 2 weeks and 4 weeks after the treatment. CONCLUSIONS: To our knowledge, this is the first report regarding the effect of a YDF laser on living tissue. Our study demonstrated that the typical histological findings of the tissue reaction to the YDF MOPA apparatus were very similar to those associated with thermal injuries. The extent and degree of tissue damage increased proportionally to the output power.

Translation and Linguistic Validation of the Korean Version of the "Benefit, Satisfaction, and Willingness to Continue" Questionnaire for Patients With Overactive Bladder / 대한배뇨장애요실금학회지

PURPOSE: The goal of this study was to develop a Korean version of the Benefit, Satisfaction, and Willingness to Continue (BSW) questionnaire from the original version, with subsequent linguistic validation by Korean patients with overactive bladder who undergo active treatment by a physician. METHODS: Translation and linguistic validation were performed in January 2013. The validation process included permission for translation, forward translation, reconciliation, backward translation, cognitive debriefing, and proofreading. RESULTS: During the forward translation process, the terms or phrases of 'benefit,' 'willingness,' 'have you had any benefit?,' 'taking all things into account' were adjusted to be more appropriate expressions in the Korean language than those used in the original version. During the backward translation process, no changes were made in terms of the sematic equivalence. In the cognitive debriefing session, 5 patients were asked to fill in the answers within 5 minutes; most reported that the translated questions were clear and easy to understand. One patient felt the questions were a little bit difficult to understand; however, the panel decided not to change the expressions because the overall level of comprehension was high and the translated terms were accurate enough to convey the meaning of the original version of the BSW. CONCLUSIONS: The present study showed a successful linguistic validation of the BSW questionnaire. Further studies are needed to assess of the psychometric properties of the BSW.

Holmium Laser Enucleation of the Prostate is Safe for Patients Above 80 Years: A Prospective Study / 대한배뇨장애요실금학회지

PURPOSE: To evaluate the effect of age on the efficacy and safety of holmium laser enucleation of the prostate (HoLEP) for the treatment of symptomatic benign prostatic hyperplasia (BPH). METHODS: A total of 579 patients underwent HoLEP procedure performed by a single surgeon (SJO) between December 2009 and May 2013. The perioperative and functional outcomes of patients in the age groups of 50-59 (group A, n=44), 60-69 (group B, n=253), 70-79 (group C, n=244), and ≥80 years (group D, n=38) were compared. The Clavien-Dindo system was used to evaluate clinical outcomes. The International Prostate Symptom Score (IPSS), maximum urinary flow rate (Qmax), postvoid residual (PVR) urine volume, and urinary continence were used to assess functional outcomes. RESULTS: In this study, the patients ≥80 years had significantly higher presence of hypertension (P=0.007), total prostate volumes (P=0.024), transitional zone volume (P=0.002), American Society of Anesthesiologists scores (P=0.006), urinary retention (P=0.032), and anticoagulation use (P=0.008) at preoperative period. Moreover, the mean values of operation time, enucleation time, morcellation time, and enucleation weight were higher in group D compared with other group patients (P=0.002, P=0.010, P0.05). All the patients in the present study showed improvement in functional outcomes after HoLEP. By the sixth month, there were no significant differences in IPSS, quality of life, Qmax, and PVR among the groups (P>0.05). CONCLUSIONS: Compared with younger patients, the patients aged ≥80 years had a similar overall morbidity and 6-month functional outcomes of HoLEP. HoLEP is a safe and effective treatment for BPH among the elderly.

Comparison of retrograde intrarenal surgery versus a single-session percutaneous nephrolithotomy for lower-pole stones with a diameter of 15 to 30 mm: A propensity score-matching study

PURPOSE: To investigate surgical outcomes between retrograde intrarenal surgery (RIRS) and percutaneous nephrolithotomy (PNL) groups for a main stone sized 15 to 30 mm and located in the lower-pole calyx. MATERIALS AND METHODS: Patients who underwent PNL or RIRS for a main stone sized 15 to 30 mm and located in the lower-pole calyx were retrospectively reviewed. Each patient in the RIRS group was matched to one in the PNL group on the basis of calculated propensity scores by use of age, sex, body mass index, previous treatment history, stone site, maximum stone size, and stone volume. We compared perioperative outcomes between the unmatched and matched groups. RESULTS: Patients underwent PNL (n=87, 66.4%) or RIRS (n=44, 33.6%). After matching, 44 patients in each group were included. Mean patient age was 54.4+/-13.7 years. Perioperative hemoglobin drop was significantly higher and the hospital stay was longer in the PNL group than in the RIRS group. The operative time was significantly longer in the RIRS group than in the PNL group. Stone-free rates were higher and complications rates were lower in the RIRS group than in the PNL group without statistical significance. The presence of a stone located in the lower-anterior minor calyx was a predictor of stone-free status. CONCLUSIONS: RIRS and single-session PNL for patients with a main stone of 15 to 30 mm located in the lower-pole calyx showed comparable surgical results. However, RIRS can be performed more safely than PNL with less bleeding. Stones in the lower-anterior minor calyx should be carefully removed during these procedures.

Urodynamic assessment of bladder and urethral function among men with lower urinary tract symptoms after radical prostatectomy: A comparison between men with and without urinary incontinence

PURPOSE: We compared bladder and urethral functions following radical prostatectomy (RP) between men with and without urinary incontinence (UI), using a large-scale database from SNU-experts-of-urodynamics-leading (SEOUL) Study Group. MATERIALS AND METHODS: Since July 2004, we have prospectively collected data on urodynamics from 303 patients with lower urinary tract symptoms (LUTS) following RP at three affiliated hospitals of SEOUL Study Group. After excluding 35 patients with neurogenic abnormality, pelvic irradiation after surgery, or a history of surgery on the lower urinary tract, 268 men were evaluated. We compared the urodynamic findings between men who had LUTS with UI (postprostatectomy incontinence [PPI] group) and those who had LUTS without UI (non-PPI group). RESULTS: The mean age at an urodynamic study was 68.2 years. Overall, a reduced bladder compliance (< or =20 mL/cmH2O) was shown in 27.2% of patients; and 31.3% patients had idiopathic detrusor overactivity. The patients in the PPI group were older (p=0.001) at an urodynamic study and had a lower maximum urethral closure pressure (MUCP) (p<0.001), as compared with those in the non-PPI group. Bladder capacity and detrusor pressure during voiding were also significantly lower in the PPI group. In the logistic regression, only MUCP and maximum cystometric capacity were identified as the related factor with the presence of PPI. CONCLUSIONS: In our study, significant number of patients with LUTS following RP showed a reduced bladder compliance and detrusor overactivity. PPI is associated with both impairment of the urethral closuring mechanism and bladder storage dysfunction.