Variation in Cervical Length over Time during a Single Transvaginal Ultrasound Examination.
Am J Perinatol
; 36(8): 781-784, 2019 07.
Article
en En
| MEDLINE
| ID: mdl-30577059
ABSTRACT
OBJECTIVE:
To quantify the degree of change in cervical length (CL) over a 3-minute transvaginal ultrasound. STUDYDESIGN:
We conducted a prospective observational study of nulliparous patients who underwent routine transvaginal CL screening at the time of their second-trimester ultrasound. We recorded CL at four time points (0, 1, 2, 3 minutes) and compared these values to determine the minute-to-minute change within a single patient.RESULTS:
A total of 771 patients were included. The mean gestational age was 20.8 weeks (±0.84). We used a linear mixed effect model to assess if each minute during the ultrasound is associated with a change in CL. The intraclass correlation coefficient between minute 0 to minute 3 was 0.82 (95% confidence interval 0.80, 0.84). This indicates that there is a relatively high within-patient correlation in CL during their ultrasound. Additionally, we stratified patients based on their starting CL; the intraclass correlation coefficient remained high for all groups. We additionally compared CL at each minute. Although there is a statistically significant difference between several time points, the actual difference is small and not clinically meaningful.CONCLUSION:
The variation in CL over a 3-minute transvaginal ultrasound examination is not clinically significant. It may be reasonable to conduct this examination over a shorter period.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Cuello del Útero
/
Ultrasonografía Prenatal
/
Medición de Longitud Cervical
Tipo de estudio:
Diagnostic_studies
/
Observational_studies
/
Risk_factors_studies
Límite:
Female
/
Humans
/
Pregnancy
Idioma:
En
Revista:
Am J Perinatol
Año:
2019
Tipo del documento:
Article