{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T13:52:12Z","timestamp":1780581132512,"version":"3.54.1"},"reference-count":0,"publisher":"Georg Thieme Verlag KG","issue":"05","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Ultraschall in Med"],"published-print":{"date-parts":[[2017,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>\n          Purpose\u2002To investigate the predictive capacity of a new method for sound spectrum analysis of Doppler signals recorded from the umbilical artery in high-risk pregnancies.<\/jats:p><jats:p>\n          Material and Methods\u2002The retrospective study comprised 127 pregnant women with various pregnancy complications between 23 and 39 gestational weeks. Umbilical artery blood flow velocity waveforms were recorded with Doppler ultrasound and characterized by pulsatility index (PI) and blood flow class (BFC). Doppler audio signals were stored on a digital video recorder and the sound frequency at the energy level 15\u200adB below its peak (MAXpeak-15\u200adB) was estimated off-line. The prediction of probability for composite adverse pregnancy outcome (operative delivery for fetal distress, admission to neonatal intensive care unit, perinatal death) was evaluated using the area under the curve (AUC) of the receiver operating characteristics (ROC) curve.<\/jats:p><jats:p>\n          Results\u2002With increasing umbilical artery BFC, the MAXpeak-15\u200adB frequencies decreased (p\u200a&lt;\u200a0.0001) and the PI increased (p\u200a&lt;\u200a0.0001). The ROC AUCs for adverse outcome for MAXpeak-15\u200adB and for PI were 0.842 and 0.836 (p\u200a=\u200a0.88), respectively. For the combination of MAXpeak-15\u200adB and PI, the corresponding AUC was 0.894, significantly higher than that of PI (p\u200a&lt;\u200a0.03) and of MAXpeak-15\u200adB (p\u200a&lt;\u200a0.05).<\/jats:p><jats:p>\n          Conclusion\u2002Umbilical artery Doppler sound spectrum analysis might be a useful supplement to PI in the clinical evaluation of fetoplacental circulation.<\/jats:p>","DOI":"10.1055\/s-0035-1553302","type":"journal-article","created":{"date-parts":[[2015,9,30]],"date-time":"2015-09-30T22:48:26Z","timestamp":1443653306000},"page":"549-555","source":"Crossref","is-referenced-by-count":5,"title":["Doppler Audio Signal Analysis as an Additional Tool in\u00a0Evaluation of Umbilical Artery Circulation"],"prefix":"10.1055","volume":"38","author":[{"given":"Ann","family":"Thuring","sequence":"additional","affiliation":[{"name":"Obstetrics and Gynecology, Lund University, Lund, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karin","family":"K\u00e4ll\u00e9n","sequence":"additional","affiliation":[{"name":"Reproduction and epidemiology, Lund University, Lund, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.","family":"Br\u00e4nnstr\u00f6m","sequence":"additional","affiliation":[{"name":"Logopedics, phoniatrics and audiology, Lund University, Lund, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomas","family":"Jansson","sequence":"additional","affiliation":[{"name":"Biomedical engineering, Lund University, Lund, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karel","family":"Mar\u0161\u00e1l","sequence":"additional","affiliation":[{"name":"Obstetrics and Gynecology, Lund University, Lund, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"194","published-online":{"date-parts":[[2015,9,30]]},"container-title":["Ultraschall in der Medizin - European Journal of Ultrasound"],"original-title":[],"language":"de","link":[{"URL":"http:\/\/www.thieme-connect.de\/products\/ejournals\/pdf\/10.1055\/s-0035-1553302.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2017,12,19]],"date-time":"2017-12-19T12:33:08Z","timestamp":1513686788000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.thieme-connect.de\/DOI\/DOI?10.1055\/s-0035-1553302"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,9,30]]},"references-count":0,"journal-issue":{"issue":"05","published-online":{"date-parts":[[2017,9,25]]},"published-print":{"date-parts":[[2017,10]]}},"URL":"https:\/\/doi.org\/10.1055\/s-0035-1553302","relation":{},"ISSN":["0172-4614","1438-8782"],"issn-type":[{"value":"0172-4614","type":"print"},{"value":"1438-8782","type":"electronic"}],"subject":[],"published":{"date-parts":[[2015,9,30]]}}}