{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T03:27:25Z","timestamp":1785295645608,"version":"3.55.0"},"reference-count":29,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2019,11,6]],"date-time":"2019-11-06T00:00:00Z","timestamp":1572998400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Neurourology and Urodynamics"],"published-print":{"date-parts":[[2020,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>The aim of this study is to develop a method to evaluate the fluid dynamics of urine flow in the lower urinary tract (LUT), especially that of vorticity.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>This investigation included three sub\u2010studies to demonstrate urine flow in the entire LUT. First, we attempted to observe vorticity generation in the urinary bladder during spontaneous voiding using transabdominal color Doppler ultrasonography (CDUS). Second, we performed transrectal CDUS to evaluate the vorticity of urine flow in the prostatic urethra. Patients with prostate cancer were enrolled before robotic surgery and divided into the vorticity and non\u2010vorticity groups based on CDUS findings for comparisons of longitudinal urethral diameter and prostatic urethral angle. Third, the vorticity of the voided urine stream was observed using a high\u2010speed video\u2010camera. Micturition was done in a standing position while synchronously monitored for urine flow using uroflowmetry.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Vorticity formation could be dynamically demonstrated in the urinary bladder and prostatic urethra using CDUS. The prostatic urethral angle of the vorticity group was more than that of the non\u2010vorticity group. High\u2010speed video recording could clearly capture vorticity and spiral shape generation in voided urine. The distance from the external urethral orifice to the first twist changed in accordance with urine flow rate.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>In a series of sub\u2010studies, this investigation proved vorticity generation in the LUT and voided urine. Vorticity was detectable in the LUT and in voided urine using CDUS and a high\u2010speed video\u2010camera. Vorticity generation might be associated with urethral morphology.<\/jats:p><\/jats:sec>","DOI":"10.1002\/nau.24193","type":"journal-article","created":{"date-parts":[[2019,11,6]],"date-time":"2019-11-06T12:02:32Z","timestamp":1573041752000},"page":"286-294","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Vorticity in lower urinary tract can be assessed and associates with urinary tract morphology in men"],"prefix":"10.1002","volume":"39","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5910-2808","authenticated-orcid":false,"given":"Tomonori","family":"Minagawa","sequence":"first","affiliation":[{"name":"Department of Urology Shinshu University School of Medicine  Matsumoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masato","family":"Tezuka","sequence":"additional","affiliation":[{"name":"Department of Urology Shinshu University School of Medicine  Matsumoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Teruyuki","family":"Ogawa","sequence":"additional","affiliation":[{"name":"Department of Urology Shinshu University School of Medicine  Matsumoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Osamu","family":"Ishizuka","sequence":"additional","affiliation":[{"name":"Department of Urology Shinshu University School of Medicine  Matsumoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2019,11,6]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/1961080b0"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1017\/S0022112062001044"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0047133"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/iju.14029"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1093\/ehjci\/jes149"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00380-017-0967-6"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.juro.2014.06.094"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0104395"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.4111\/kju.2012.53.6.410"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1111\/luts.12203"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.mehy.2007.07.012"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ultrasmedbio.2017.07.006"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.153.3.6387797"},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-5347(17)42391-3"},{"key":"e_1_2_9_16_1","doi-asserted-by":"crossref","first-page":"791","DOI":"10.1016\/S0094-0143(21)01812-7","article-title":"Sonourethrography in the evaluation of urethral stricture disease","volume":"16","author":"Klosterman PW","year":"1989","journal-title":"Urol Clin North Am"},{"key":"e_1_2_9_17_1","doi-asserted-by":"publisher","DOI":"10.1002\/jcu.1870210404"},{"key":"e_1_2_9_18_1","first-page":"249","article-title":"Sonourethrography in anterior urethral stricture: comparison to radiographic urethrography","volume":"67","author":"Arda K","year":"1995","journal-title":"Arch Ital Urol Androl"},{"key":"e_1_2_9_19_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-5347(01)64219-8"},{"key":"e_1_2_9_20_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.urology.2011.04.051"},{"key":"e_1_2_9_21_1","doi-asserted-by":"publisher","DOI":"10.1111\/iju.12816"},{"issue":"43","key":"e_1_2_9_22_1","first-page":"443","article-title":"Modified sonourethrography assists urethral catheterization","volume":"2016","author":"Minagawa T","year":"2001","journal-title":"J Med Ultrason"},{"key":"e_1_2_9_23_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4612-5476-8_44"},{"key":"e_1_2_9_24_1","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1520-6777(1997)16:1<1::AID-NAU1>3.0.CO;2-I"},{"key":"e_1_2_9_25_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.ju.0000173637.07357.9e"},{"key":"e_1_2_9_26_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.juro.2012.11.021"},{"key":"e_1_2_9_27_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-5347(17)62626-0"},{"key":"e_1_2_9_28_1","first-page":"552","article-title":"The interrelationship of some hydrodynamic parameters of voiding","volume":"5","author":"Gleason DM","year":"1968","journal-title":"Invest Urol"},{"key":"e_1_2_9_29_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-5347(17)62498-4"},{"key":"e_1_2_9_30_1","first-page":"585","article-title":"The shape and cross\u2010sectional area of the distal urethra critically affects urinary flow","volume":"8","author":"Gleason DM","year":"1971","journal-title":"Invest Urol"}],"container-title":["Neurourology and Urodynamics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fnau.24193","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/nau.24193","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/nau.24193","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/nau.24193","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,9,2]],"date-time":"2023-09-02T00:50:28Z","timestamp":1693615828000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/nau.24193"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,11,6]]},"references-count":29,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2020,1]]}},"alternative-id":["10.1002\/nau.24193"],"URL":"https:\/\/doi.org\/10.1002\/nau.24193","archive":["Portico"],"relation":{},"ISSN":["0733-2467","1520-6777"],"issn-type":[{"value":"0733-2467","type":"print"},{"value":"1520-6777","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,11,6]]},"assertion":[{"value":"2019-07-18","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2019-09-29","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2019-11-06","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}