Ultrasound Assessment of Placenta Previa »migration« in Relationship to Maternal Demographic Factors
Year: 2007
Type: article
Study design: Observational Study
Abstract: Objective.To assess the association between maternal age, parity, history of prior cesarean delivery and placental location in evaluating the persistence and rate of placental migration in low-lying or complete placenta previas followed by serial ultrasound examination.Study design.This is a retrospective study of 92 cases of low-lying/placenta previa diagnosed at 28 weeks of gestation followed serially by transvaginal ultrasound.The patients were stratified into three groups depending on the placenta to internal cervical os distance: (1) an overlap of 0.0 cm and over the cervical os (complete previa), (2) 0.1 to 2.9 cm (marginal placenta previa), (3) 3.0 cm or above (normal placental location).The prevalence of complete and marginal placenta previas, and the mean rate of placental »migration« (mm/week) were obtained at 28 and 36 weeks of gestation, and compared with maternal age, parity, history of prior cesarean delivery and placental location.Results.At the time of delivery, 51 patients had placenta previa: 22 complete and 29 marginal placenta previas.In contrast, 41 patients had sufficient placental 'migration' to be categorized into the normal placental location group.The prevalence of complete placenta of 3.3% and 6.5% at 28 weeks, and 3.3% and 5.4% at 36 weeks' gestation, for patients who had parity ³2, or history or prior cesarean delivery (CD), respectively, was not statistically significant.The rate of placental migration was significantly associated with maternal age (p=0.002), while did not differ when stratified by parity (p=0.672) or prior history of CD (p=0.805), or placental location (p=0.147).Conclusion.Maternal age significantly modifies the rate of placenta previa migration.A history of prior CD, maternal parity and placental location did not affect the rate of placental migration in our sample of patients with complete or marginal placenta previa diagnosed by ultrasound at 28 weeks' gestation.Izvorni rad Klju~ne rije~i: placenta previja, ultrazvuk, migracija, porod, paritet [email protected] rada.Prosuditi povezanost dobi majke, pariteta, prethodnog carskog reza i smje{taja posteljice, s perzistiranjem ili migracijom posteljice kod nisko nasjele ili predle`e}e placente previje, pra}ene serijskim ultrazvu~nim pregledima.Na~in istra`ivanja.Retrospektivna studija 92 nisko nasjele posteljice ili placente previje, dijagnosticirane s 28 tjedana i serijski ultrazvu~no pra}ene.Bolesnice su bile podijeljene u tri skupine, ovisno o udaljenosti posteljice od unu-tra{njeg u{}a cerviksa: 1) prera{tanje vi{e od 0,0 mm preko u{}a cerviksa (kompletna previja); 2) 0,1 do 2,9 cm (marginalna previja); 3) 3,0 ili vi{e cm od u{}a cerviksa (normalni smje{taj posteljice).Zastupljenost kompletnih i marginalnih placenta previja i srednja vrijednost »migracije« posteljice (mm/tjedan) su utvr|eni s 28 i 36 tjedana trudno}e te uspore|eni s dobi majke, paritetom, ranijim carskim rezom i smje{tajem posteljice.Rezultati.Od 92 trudnice s 28 tjedana, u vrijeme poroda 51 trudnica je imala placentu previju: 22 kompletnu i 29 marginalnu, dok je u 41 trudnice posteljica dovoljno »migrirala« da bi bila razvrstana u skupinu s normalnim smje{tajem.Zastupljenost kompletne previje za trudnice s ³2 poroda od 3,3% s 28 i 3,3% s 36 tjedana, odnosno s prethodnim carskim rezom od 6,5% s 28 i 5,4% s 36 tjedana, nije statisti~ki signifikantno razli~ita.Stopa »migracije« posteljice je znakovito povezana s dobi trudnice (p=0,002), a nije s paritetom (p=0,672), ranijim carskim rezom (p=0,805) ili le`i{tem posteljice (p=0,147).Zaklju~ak.Dob trudnice znakovito modificira stupanj migracije placente previje.U na{em uzorku kompletnih i marginalnih posteljica otkrivenih ultrazvukom s 28 tjedana, raniji carski rez, paritet majke i le`i{te posteljice (sprijeda/straga) ne utje~u na stupanj migracije posteljice.
Language: English
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W237043855