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Titolo:
Comparison between two- and three-dimensional ultrasound measurements of nuchal translucency
Autore:
Clementschitsch, G; Hasenohrl, G; Schaffer, H; Steiner, H;
Indirizzi:
St Johannsspital Salzburg, Prenatal Diag & Therapy Unit, Dept Obstet & Gynecol, A-5020 Salzburg, Austria St Johannsspital Salzburg Salzburg AustriaA-5020 5020 Salzburg, Austria
Titolo Testata:
ULTRASOUND IN OBSTETRICS & GYNECOLOGY
fascicolo: 5, volume: 18, anno: 2001,
pagine: 475 - 480
SICI:
0960-7692(200111)18:5<475:CBTATU>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRENATAL-DIAGNOSIS; FIRST-TRIMESTER; 1ST TRIMESTER; MATERNAL AGE; ABNORMALITIES; TRISOMY-21; PREGNANCY; THICKNESS; GESTATION;
Keywords:
nuchal translucency; prenatal diagnosis; three-dimensional ultrasound; ultrasound screening;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Steiner, H St Johannsspital Salzburg, Prenatal Diag & Therapy Unit, Dept Obstet & Gynecol, Mullner Hauptstr 48, A-5020 Salzburg, Austria St Johannsspital Salzburg Mullner Hauptstr 48 Salzburg Austria A-5020
Citazione:
G. Clementschitsch et al., "Comparison between two- and three-dimensional ultrasound measurements of nuchal translucency", ULTRASOUN O, 18(5), 2001, pp. 475-480

Abstract

Objective Fetal nuchal translucency measurement has been introduced as a screening test for the calculation of risk of chromosomal abnormalities. Thepurpose of this study was to investigate. (1) the feasibility of obtainingnuchal translucency measurements using three-dimensional ultrasound; (2) whether three-dimensional ultrasound could improve and facilitate the required repeated measurements of nuchal translucency; (3) the correlation between two- and three-dimensional nuchal translucency measurement values. Subjects and methods Between September 1999 and May 2000, in a prospectivecohort study, 229 unselected pregnant women with a mean age of 34.6 (range, 20-46) years were examined. The mean fetal crown-rump length was 64.3 (range, 45-84) mm. Nuchal translucency thickness was measured first by two- and then by three-dimensional ultrasound in two planes (three-dimensional mid-sagittal and three-dimensional transverse). An attempt was made to repeat each nuchal translucency measurement three ti. mes (totalling nine measurements per patient) and the means of the two- and three-dimensional measurements were compared. The majority (95%) of the measurements were made transabdominally and 5% were made transvaginally. The time limit for each examination was 20 min. Results With the two-dimensional method, nuchal translucency could be measured in 96.8% of cases. Of these, three measurements could be obtained in 51.7%, two in 23.2% and only one in 25.1%. The three-dimensional examinationwas successful in 98.6% of cases. Of these, three measurements could be obtained in 60%, two in 22.8% and one in 17.2%. Transvaginally, all examinations were successful. The main reason for the failure of two-dimensional ultrasound was the fetal position, which in some cases precluded the distinction between fetal skin and amnion or the uterine wall. Using two-dimensionalultrasound, 6.3% of the cases of measurement failure were due to an inability to differentiate clearly between fetal skin and amnion, whilst the equivalent value for the three-dimensional method was only 3.3%. For the three-dimensional technique, fetal movement was the main reason for failure. The mean time for both methods was similar (9 min and 10 min for two- and three-dimensional ultrasound, respectively) and the correlation between the measurements obtained by the two-and three-dimensional techniques was very high(r = 0.97). Conclusion The number of fetuses in which nuchal translucency could be measured tended to be higher with three-dimensional ultrasound, although the difference was not statistically significant. The possibility of rotating a stored volume and inspecting it in three orthogonal planes makes three-dimensional ultrasound a useful tool for nuchal translucency measurements, especially in doubtful cases.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 23:10:47