Bladder (San Francisco, Calif.)最新文献

{"title":"Biomarker discovery and beyond for diagnosis of bladder diseases.","authors":"Sungyong Jung,&nbsp;Jayoung Kim","doi":"10.14440/bladder.2020.813","DOIUrl":"https://doi.org/10.14440/bladder.2020.813","url":null,"abstract":"<p><p>Molecular biosignatures of altered cellular landscapes and functions have been casually linked with pathological conditions, which imply the promise of biomarkers specific to bladder diseases, such as bladder cancer and other dysfunctions. Urinary biomarkers are particularly attractive due to costs, time, and the minimal and noninvasive efforts acquiring urine. The evolution of omics platforms and bioinformatics for analyzing the genome, epigenome, transcriptome, proteome, lipidome, metabolome, <i>etc</i>., have enabled us to develop more sensitive and disease-specific biomarkers. These discoveries broaden our understanding of the complex biology and pathophysiology of bladder diseases, which can ultimately be translated into the clinical setting. In this short review, we will discuss current efforts on identification of promising urinary biomarkers of bladder diseases and their roles in diagnosis and monitoring. With these considerations, we also aim to provide a prospective view of how we can further utilize these bladder biomarkers in developing ideal and smart medical devices that would be applied in the clinic.</p>","PeriodicalId":72421,"journal":{"name":"Bladder (San Francisco, Calif.)","volume":"7 1","pages":"e40"},"PeriodicalIF":0.0,"publicationDate":"2020-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/3b/7a/bladder-7-1-e40.PMC7401981.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38247408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Malignant transformation of inflammatory myofibroblastic tumor of urinary bladder: A rare case scenario.","authors":"Arati A Inamdar,&nbsp;Rajiv Pulinthanathu","doi":"10.14440/bladder.2019.805","DOIUrl":"https://doi.org/10.14440/bladder.2019.805","url":null,"abstract":"<p><p>Inflammatory myofibroblastic tumor (IMT) previously known as inflammatory pseudotumor, plasma cell granuloma, pseudosarcoma, myxoid hamartoma or inflammatory myofibrohistiocytic proliferation is recently recognized by World Health Organization (WHO) as \"IMT\" and is considered as a rare benign tumor of soft tissues occurring commonly in lung, liver and mesentry and omentum. IMT is mainly identified as a lesion of children and young population. In this report, we describe a rare case of IMT occurring in a 93-year-old female in urinary bladder with initial benign presentation but demonstrating rapid malignant transformation as confirmed with morphology and immunohistochemical (IHC) stains. Our report highlights the importance of close follow for IMT showing malignant transformation along with utility of IHC stains to evaluate the degree of malignant transformation in such cases.</p>","PeriodicalId":72421,"journal":{"name":"Bladder (San Francisco, Calif.)","volume":"6 2","pages":"e39"},"PeriodicalIF":0.0,"publicationDate":"2019-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/78/9e/bladder-6-2-e39.PMC7401991.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38247406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Purinergic P2X7 receptors as therapeutic targets in interstitial cystitis/bladder pain syndrome; key role of ATP signaling in inflammation.","authors":"Zhinoos Taidi,&nbsp;Kylie J Mansfield,&nbsp;Lucy Bates,&nbsp;Hafiz Sana-Ur-Rehman,&nbsp;Lu Liu","doi":"10.14440/bladder.2019.789","DOIUrl":"https://doi.org/10.14440/bladder.2019.789","url":null,"abstract":"<p><p>Interstitial cystitis/bladder pain syndrome (IC/BPS) is a chronic lower urinary tract condition. Patients with IC/BPS suffer from debilitating pain and urinary urgency. The underlying etiology of IC/BPS is unknown and as such current treatments are mostly symptomatic with no real cure. Many theories have been proposed to describe the etiology of IC/BPS, but this review focuses on the role of inflammation. In IC/BPS patients, the permeability of the urothelium barrier is compromised and inflammatory cells infiltrate the bladder wall. There are increased levels of many inflammatory mediators in patients with IC/BPS and symptoms such as pain and urgency that have been associated with the degree of inflammation. Recent evidence has highlighted the role of purinergic receptors, specifically the P2X7 receptor, in the process of inflammation. The results from studies in animals including cyclophosphamide-induced hemorrhagic cystitis strongly support the role of P2X7 receptors in inflammation. Furthermore, the deletion of the P2X7 receptor or antagonism of this receptor significantly reduces inflammatory mediator release from the bladder and improves symptoms. Research results from IC/BPS patients and animal models of IC/BPS strongly support the crucial role of inflammation in the pathophysiology of this painful disease. Purinergic signaling and purinergic receptors, especially the P2X7 receptor, play an undisputed role in inflammation. Purinergic receptor antagonists show positive results in treating different symptoms of IC/BPS.</p>","PeriodicalId":72421,"journal":{"name":"Bladder (San Francisco, Calif.)","volume":"6 1","pages":"e38"},"PeriodicalIF":0.0,"publicationDate":"2019-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/70/05/bladder-6-1-e38.PMC7401983.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38247407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Outcomes of patients undergoing radiation therapy for bladder cancer.","authors":"Salman Hasan,&nbsp;Eva Mercedes Galvan,&nbsp;Courtney Shaver,&nbsp;Michael Hermans,&nbsp;Chul Soo Ha,&nbsp;Gregory P Swanson","doi":"10.14440/bladder.2018.785","DOIUrl":"https://doi.org/10.14440/bladder.2018.785","url":null,"abstract":"<p><strong>Objectives: </strong>To review our two institutional experiences regarding the historical referral patterns of bladder cancer patients to receive radiation therapy, characteristics of these referred patients, and their treatment outcomes.</p><p><strong>Methods: </strong>A retrospective review was performed analyzing patients who underwent radiation therapy for bladder cancer from 2005 to 2015 (<i>n</i> = 69) at two regional referral institutions. The age-adjusted Charlson comorbidity index (AACCI) was calculated for each patient. Patients were divided into three groups: definitive concurrent chemoradiation (CCR), aggressive radiation (AR) alone ≥ 50 Gy, or palliative radiation alone (PR) < 50 Gy. Gastrointestinal (GI) and genitourinary (GU) acute toxicities were recorded.</p><p><strong>Results: </strong>The median overall AACCI score was 7, which correlates to a two-year expected survival of 55% ± 11%. Thirty-five (50.7%) patients received CCR, 19 (27.5%) received AR, and 15 (21.7%) received PR. Patients presented with hematuria (<i>n</i> = 43, 62%), pain (<i>n</i> = 18, 26%), or obstruction (<i>n</i> = 12, 17%). Of symptomatic patients, treatment improved hematuria in 86%, pain in 75%, and obstruction in 42%. Twenty-two recurrences (32%) were identified at follow-up. Local, regional, and distant recurrences developed in 20%, 14%, and 17% of patients who received CCR. There were two grade 3 GU toxicities and one grade 3 GI toxicity; all grade 3 toxicities were in patients receiving CCR.</p><p><strong>Conclusions: </strong>Bladder preservation is possible with chemoradiation therapy; however, urologists rarely refer patients for consideration of chemoradiation. The limited patients who are referred for radiation generally have limited life expectancy, significant comorbidities, or have advanced disease amenable only to palliation. Palliative radiation improves symptoms with minimal toxicity.</p>","PeriodicalId":72421,"journal":{"name":"Bladder (San Francisco, Calif.)","volume":"5 4","pages":"e37"},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ee/e7/bladder-5-4-e37.PMC7401990.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38247405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of bladder voiding efficiency in women when calculated from a free flow versus an intubated flow.","authors":"Françoise A Valentini,&nbsp;Brigitte G Marti,&nbsp;Philippe E Zimmern,&nbsp;Gilberte Robain,&nbsp;Pierre P Nelson","doi":"10.14440/bladder.2018.790","DOIUrl":"https://doi.org/10.14440/bladder.2018.790","url":null,"abstract":"<p><strong>Objectives: </strong>To assess the reproducibility of bladder voiding efficiency (BVE, Void%) between free flow (FF) and intubated flow (IF) and to correlate BVE measurements with urinary incontinence (UI) complaints and urodynamic (UDS) findings in women.</p><p><strong>Methods: </strong>UDS recordings of women referred for LUTD evaluation to our UDS center were reviewed. Each file included FF at arrival, filling cystometry, and IF. Post-void residual volumes (PVR) were measured by catheterization after FF and IF. Women unable to void during the study or who expelled the catheter during IF, as well as studies with voided volume < 100 ml were excluded. Data was sub-analyzed according to 3 age categories, and UI complaints and UDS findings.</p><p><strong>Results: </strong>Over the past 3 years, 237 UDS studies for FF and IF met all criteria. There was significant difference between voided volumes (232 <i>vs</i>. 335 ml) and PVR (24 <i>vs</i>. 71 ml) respectively (<i>P</i> < 0.0001). For the whole population, BVE IF (79.8 ± 28.6) was significantly lower than BVE FF (90.7 ± 15.9) (<i>P</i> < 0.0001). A significant decrease of BVE during IF was only noted for UI. BVE IF was significantly different in women in the peri-menopause and older groups. PVR IF increased with age and was significantly higher than PVR FF for women older than 45 years (<i>P</i> < 0.0001).</p><p><strong>Conclusions: </strong>BVE measurement in women has a role, but is most reliable from a FF. BVE is influenced by age and urinary incontinence complaints as well as UDS findings.</p>","PeriodicalId":72421,"journal":{"name":"Bladder (San Francisco, Calif.)","volume":"5 4","pages":"e36"},"PeriodicalIF":0.0,"publicationDate":"2018-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/6d/8b/bladder-5-4-e36.PMC7401985.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38247404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Increased utilization of external beam radiotherapy relative to cystectomy for localized, muscle-invasive bladder cancer: a SEER analysis.","authors":"Tyler J Wilhite,&nbsp;David Routman,&nbsp;Andrea L Arnett,&nbsp;Amy E Glasgow,&nbsp;Elizabeth B Habermann,&nbsp;Thomas M Pisansky,&nbsp;Stephen A Boorjian,&nbsp;Krishan R Jethwa,&nbsp;Lance A Mynderse,&nbsp;Kristofer W Roberts,&nbsp;Igor Frank,&nbsp;Richard Choo,&nbsp;Brian J Davis,&nbsp;Bradley J Stish","doi":"10.14440/bladder.2018.639","DOIUrl":"https://doi.org/10.14440/bladder.2018.639","url":null,"abstract":"<p><strong>Objective: </strong>To assess recent utilization patterns of radiotherapy (RT) relative to cystectomy for muscle-invasive bladder cancer (MIBC) and evaluate survival trends over time in patients receiving RT.</p><p><strong>Materials and methods: </strong>The surveillance, epidemiology, and end results program (SEER) was used to identify patients diagnosed between 1992 and 2013 with localized MIBC. Patients with a prior history of non-bladder malignancy, who received no treatment, or did not have available treatment information, were excluded. Treatment utilization patterns were assessed using Cochran-Armitage tests for trend, and patient characteristics were compared using chi-square tests. Overall survival (OS) and cause-specific survival (CSS) were estimated using the Kaplan-Meier method. All-cause (ACM) and cause-specific mortality (CSM) were evaluated with multivariable Cox proportional hazards regression.</p><p><strong>Results: </strong>Of 16175 patients analyzed, 11917 (74%) underwent cystectomy, and 4258 (26%) were treated with RT. Patients who received RT were older (median age 79 <i>vs</i>. 68, <i>P</i> < 0.01). Over time, the proportion of patients receiving RT relative to cystectomy increased (24% 1992-2002 <i>vs</i>. 28% 2003-2013, <i>P</i> < 0.01), despite median patient age throughout the study period remaining unchanged (71 for each 1992-2002 and 2003-2013, <i>P</i> = 0.41). For RT, compared with patients diagnosed earlier, those diagnosed from 2010-2013 showed improved OS (64% <i>vs</i>. 60% at 1 year, <i>P</i> < 0.01; 38% <i>vs</i>. 29% at 3 years, <i>P</i> < 0.01) and CSS (71% <i>vs</i>. 67% at 1 year, <i>P</i> = 0.01; 51% <i>vs</i>. 40% at 3 years, <i>P</i> < 0.01). On multivariable analysis, diagnosis from 2010-2013 was associated with a lower estimated risk of ACM (hazard ratio 0.77; 95% confidence interval 0.66-0.89, <i>P</i> < 0.001) and CSM (hazard ratio 0.81; 95% confidence interval 0.67-0.97, <i>P</i> = 0.02).</p><p><strong>Conclusion: </strong>Utilization of RT for localized MIBC increased relative to cystectomy from 1992 to 2013, despite the median age of treated patients remaining unchanged. More recent survival outcomes for patients receiving RT were improved, supporting continued use of bladder preservation strategies utilizing RT.</p>","PeriodicalId":72421,"journal":{"name":"Bladder (San Francisco, Calif.)","volume":"5 3","pages":"e34"},"PeriodicalIF":0.0,"publicationDate":"2018-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/8f/89/bladder-5-3-e34.PMC7401988.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38246986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antibiotic prophylaxis is not associated with reduced urinary tract infection-related complications after cystectomy and ileal conduit.","authors":"Carson Kirkpatrick,&nbsp;Allan Haynes,&nbsp;Pranav Sharma","doi":"10.14440/bladder.2018.722","DOIUrl":"https://doi.org/10.14440/bladder.2018.722","url":null,"abstract":"<p><strong>Objectives: </strong>Majority of complications after ileal conduit urinary diversion with cystectomy are related to urinary tract infections (UTIs). Controversy exists regarding use of prophylactic antibiotics after surgery. We determined if prophylactic antibiotic use during ureteral stent placement after ileal conduit urinary diversion decreased incidence of UTI-related complications.</p><p><strong>Methods: </strong>We retrospectively identified 75 consecutive patients who underwent ileal conduit urinary diversion with cystectomy at our institution from 2010 to 2016. Patients were stratified based on presence or absence of a UTI-related complication in the 90-day postoperative period. Means were compared with independent <i>t</i>-test and proportions with chi-square analysis. Multivariate logistic regression was performed to determine independent predictors of UTI-related complications.</p><p><strong>Results: </strong>Forty-five patients (60%) were prescribed prophylactic antibiotics after surgery. Mean duration of antibiotic use was 15 d, and mean duration of ureteral stenting was 25 d. Most common antibiotics used included fluoroquinolones (<i>n</i> = 23, 30.7%) followed by sulfamethoxazole-trimethoprim (<i>n</i> = 14, 18.7%). Rate of 90-day UTI-related complications was 36% (<i>n</i> = 27), and 90-day UTI-related readmission rate was 14.7% (<i>n</i> = 11). On bivariate and multivariate analysis, prophylactic antibiotic use was not associated with reduced 90-day UTI-related complications (<i>P</i> > 0.05). Patients prescribed prophylactic antibiotics had increased incidence of <i>Clostridium difficile</i> infections in the 90-day postoperative period compared to controls (20% <i>vs</i>. 3.3%; <i>P</i> = 0.038).</p><p><strong>Conclusions: </strong>Prophylactic antibiotic use after ileal conduit urinary diversion with cystectomy was not associated with reduced UTI-related complications, and rate of <i>Clostridium difficile</i> infections was higher in this patient cohort. The effect of early removal of ureteral stents on UTI risk still has to be elucidated.</p>","PeriodicalId":72421,"journal":{"name":"Bladder (San Francisco, Calif.)","volume":"5 3","pages":"e35"},"PeriodicalIF":0.0,"publicationDate":"2018-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/92/e0/bladder-5-3-e35.PMC7401989.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38246985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-invasive voiding assessment in conscious mice.","authors":"Martin Sidler,&nbsp;Karen J Aitken,&nbsp;Sarah Forward,&nbsp;Alex Vitkin,&nbsp;Darius J Bagli","doi":"10.14440/bladder.2018.582","DOIUrl":"https://doi.org/10.14440/bladder.2018.582","url":null,"abstract":"<p><strong>Objective: </strong>To review available options of assessing murine bladder function and to evaluate a non-invasive technique suitable for long-term recording.</p><p><strong>Methods: </strong>We reviewed previously described methods to record rodent bladder function. We used modified metabolic cages to capture novel recording tracings of mouse micturition. We evaluated our method in a pilot study with female mice undergoing partial bladder outlet obstruction or sham operation, respectively; half of the partial obstruction and sham group received treatment with an S6K-inhibitor, targeting the mTOR pathway, which is known to be implicated in bladder response to obstruction.</p><p><strong>Results: </strong>Our non-invasive method using continuous urine weight recording reliably detected changes in murine bladder function resulting from partial bladder outlet obstruction or treatment with S6K-inhibitor. We found obstruction as well as treatment with S6K-inhibitor to correlate with a hyperactive voiding pattern.</p><p><strong>Conclusions: </strong>While invasive methods to assess murine bladder function largely disturb bladder histology and intrinsically render post-cystometry gene expression analysis of questionable value, continuous urine weight recording is a reliable, inexpensive, and critically non-invasive method to assess murine bladder function, suitable for a long-term application.</p>","PeriodicalId":72421,"journal":{"name":"Bladder (San Francisco, Calif.)","volume":"5 2","pages":"e33"},"PeriodicalIF":0.0,"publicationDate":"2018-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/92/a4/bladder-5-2-e33.PMC7401987.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38246984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of 2D and 3D ultrasound methods to measure serial bladder volumes during filling: Steps toward development of non-invasive ultrasound urodynamics","authors":"Anna S Nagle, Rachel J. Bernardo, Jary Varghese, L. Carucci, A. Klausner, J. Speich","doi":"10.14440/bladder.2018.565","DOIUrl":"https://doi.org/10.14440/bladder.2018.565","url":null,"abstract":"OBJECTIVES Non-invasive methods to objectively characterize overactive bladder (OAB) and other forms of voiding dysfunction using real-time ultrasound are currently under development but require accurate and precise serial measurements of bladder volumes during filling. This study’s objective was to determine the most accurate and precise ultrasound-based method of quantifying serial bladder volumes during urodynamics (UD). METHODS Twelve female participants with OAB completed an extended UD procedure with the addition of serial bladder ultrasound images captured once per minute. Bladder volume was measured using three ultrasound methods: (1) Vspheroid: two-dimensional (2D) method calculated assuming spheroid geometry; (2) Vbih: 2D correction method obtained by multiplying Vspheroid by a previously derived correction factor of 1.375; and (3) V3D: three-dimensional (3D) method obtained by manually tracing the bladder outline in six planes automatically reconstructed into a solid rendered volume. These volumes were compared to a control (Vcontrol) obtained by adding UD infused volume and the volume of estimated urine production. RESULTS Based on linear regression analysis, both Vbih and V3D were fairly accurate estimators of Vcontrol, but V3D was more precise. Vspheroid significantly underestimated Vcontrol. CONCLUSIONS Although the Vbih and V3D methods were more accurate than the more-commonly used Vspheroid method for measuring bladder volumes during UD, the V3D method was the most precise and could best account for non-uniform bladder geometries. Therefore, the V3D method may represent the best tool required for the continued development of non-invasive methods to diagnose OAB and other forms of voiding dysfunction.","PeriodicalId":72421,"journal":{"name":"Bladder (San Francisco, Calif.)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44762008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of 2D and 3D ultrasound methods to measure serial bladder volumes during filling: Steps toward development of non-invasive ultrasound urodynamics.","authors":"Anna S Nagle,&nbsp;Rachel J Bernardo,&nbsp;Jary Varghese,&nbsp;Laura R Carucci,&nbsp;Adam P Klausner,&nbsp;John E Speich","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Objectives: </strong>Non-invasive methods to objectively characterize overactive bladder (OAB) and other forms of voiding dysfunction using real-time ultrasound are currently under development but require accurate and precise serial measurements of bladder volumes during filling. This study's objective was to determine the most accurate and precise ultrasound-based method of quantifying serial bladder volumes during urodynamics (UD).</p><p><strong>Methods: </strong>Twelve female participants with OAB completed an extended UD procedure with the addition of serial bladder ultrasound images captured once per minute. Bladder volume was measured using three ultrasound methods: (1) V_spheroid: two-dimensional (2D) method calculated assuming spheroid geometry; (2) V_bih: 2D correction method obtained by multiplying V_spheroid by a previously derived correction factor of 1.375; and (3) V_3D: three-dimensional (3D) method obtained by manually tracing the bladder outline in six planes automatically reconstructed into a solid rendered volume. These volumes were compared to a control (V_control) obtained by adding UD infused volume and the volume of estimated urine production.</p><p><strong>Results: </strong>Based on linear regression analysis, both V_bih and V_3D were fairly accurate estimators of V_control, but V_3D was more precise. V_spheroid significantly underestimated V_control.</p><p><strong>Conclusions: </strong>Although the V_bih and V_3D methods were more accurate than the more-commonly used V_spheroid method for measuring bladder volumes during UD, the V_3D method was the most precise and could best account for non-uniform bladder geometries. Therefore, the V_3D method may represent the best tool required for the continued development of non-invasive methods to diagnose OAB and other forms of voiding dysfunction.</p>","PeriodicalId":72421,"journal":{"name":"Bladder (San Francisco, Calif.)","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/63/10/bladder-5-1-e32.PMC5771657.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35754471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}