{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,3,31]],"date-time":"2022-03-31T19:52:29Z","timestamp":1648756349204},"reference-count":0,"publisher":"Georg Thieme Verlag KG","issue":"04","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Ultrasound Int Open"],"published-print":{"date-parts":[[2017,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>\nPurpose To investigate the variability of the normal-sized fetal renal pelvis (\u22645\u2009mm) over time and to analyze repeatability of measurements.<\/jats:p><jats:p>\nMaterials and Methods 98 fetal renal pelvises and 49 fetal urinary bladders were analyzed at a gestational age of 17\u201320 weeks at St. Olavs Hospital, Trondheim, Norway. The anterior-posterior diameter (APD) of the fetal renal pelvis and two diameters of the fetal bladder were measured with an interval of at least 30\u2009min. Intra- and interobserver variations and variations over time and in association with bladder size were investigated.<\/jats:p><jats:p>\nResults The mean difference in renal pelvis size between the first and second measurements was 0.09\u2009mm (95% CI, \u22120.09 to 0.26\u2009mm). The variation over time was \u22641\u2009mm in 85% of cases and the renal pelvis was \u22644\u2009mm in both the first and second examinations in 92% of cases. The intraclass correlation coefficient (ICC) was 0.54 (95% CI: 0.31 to 0.69). We did not observe any association between variation of bladder size and variation of APD. The difference in fetal renal pelvis size was \u22641\u2009mm in 70% of observations for the first examiner and 58% for the second examiner. The intraobserver ICCs were 0.71 (95% CI: 0.62\u20130.78) and 0.60 (95% CI: 0.50\u20130.70) for the two observers respectively. The interobserver difference was \u22641\u2009mm in 72% of cases and the interobserver ICC was 0.56 (95% CI: 0.34\u20130.71).<\/jats:p><jats:p>\nConclusion The variation of the APD of the fetal renal pelvis over time was small in fetuses with the APD in the lower range and can mainly be explained by intraobserver variation.<\/jats:p>","DOI":"10.1055\/s-0043-116661","type":"journal-article","created":{"date-parts":[[2017,9,26]],"date-time":"2017-09-26T18:40:50Z","timestamp":1506451250000},"page":"E131-E136","source":"Crossref","is-referenced-by-count":0,"title":["Variability Over Time of Normal-Sized Fetal Renal Pelvis During the Second Trimester Scan"],"prefix":"10.1055","volume":"03","author":[{"given":"Maria","family":"R\u00f8set","sequence":"additional","affiliation":[{"name":"National Center for Fetal Medicine, Trondheim University Hospital (St Olav\u2019s Hospital), Trondheim, Norway"},{"name":"Institute of clinical and molecular medicine, Norwegian University of Science and Technology, Trondheim, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Harm-Gerd","family":"Blaas","sequence":"additional","affiliation":[{"name":"National Center for Fetal Medicine, Trondheim University Hospital (St Olav\u2019s Hospital), Trondheim, Norway"},{"name":"Institute of clinical and molecular medicine, Norwegian University of Science and Technology, Trondheim, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tove","family":"Fagerli","sequence":"additional","affiliation":[{"name":"National Center for Fetal Medicine, Trondheim University Hospital (St Olav\u2019s Hospital), Trondheim, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Torbj\u00f8rn","family":"Eggeb\u00f8","sequence":"additional","affiliation":[{"name":"National Center for Fetal Medicine, Trondheim University Hospital (St Olav\u2019s Hospital), Trondheim, Norway"},{"name":"Institute of clinical and molecular medicine, Norwegian University of Science and Technology, Trondheim, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"194","published-online":{"date-parts":[[2017,9,26]]},"container-title":["Ultrasound International Open"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/www.thieme-connect.de\/products\/ejournals\/pdf\/10.1055\/s-0043-116661.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,5,6]],"date-time":"2019-05-06T15:30:14Z","timestamp":1557156614000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.thieme-connect.de\/DOI\/DOI?10.1055\/s-0043-116661"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,9]]},"references-count":0,"journal-issue":{"issue":"04","published-online":{"date-parts":[[2017,9,26]]},"published-print":{"date-parts":[[2017,9]]}},"URL":"https:\/\/doi.org\/10.1055\/s-0043-116661","relation":{},"ISSN":["2509-596X","2199-7152"],"issn-type":[{"value":"2509-596X","type":"print"},{"value":"2199-7152","type":"electronic"}],"subject":[],"published":{"date-parts":[[2017,9]]}}}