Preterm labor diagnosis by sonographic measurement of the uterine cervical length (original) (raw)
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Radiologia Brasileira, 2010
OBJETIVO: Avaliar o comprimento do colo uterino pela ultrassonografia transvaginal em uma população de gestantes normais e construir uma curva de normalidade no período de 20 a 34 semanas de gestação. MATERIAIS E MÉTODOS: Estudo de corte transversal, incluindo 145 gestantes normais, com feto único, vivo, sem enfermidades, entre 20 e 34 semanas de gravidez, examinadas nos serviços de ultrassonografia do Hospital Universitário Júlio Müller e de uma clínica privada. As gestantes foram submetidas a ultrassonografia endovaginal, com registro do comprimento cervical. Critérios de exclusão foram: parto prematuro, rotura prematura pré-termo das membranas, placenta prévia, uso de fármacos tocolíticos e/ou progesterona, cerclagem ou qualquer intervenção cirúrgica prévia no colo. A associação entre o comprimento do colo uterino e a idade gestacional foi examinada por regressão linear. RESULTADOS: O comprimento cervical diminuiu progressivamente em 0,8 mm a cada semana, à medida que a idade ges...
Revista da Associação Médica Brasileira, 2013
fosse transformada em um modo em tempo real foi introduzida e tem sido chamada de ultrassonografia em quarta dimensão (4D), a qual permite o monitoramento contínuo da face fetal e de outras áreas da superfície do feto, como, por exemplo, suas extremidades. Alguns estudos já se ocuparam em avaliar esta nova metodologia na observação do comportamento fetal durante diferentes estágios da gestação, na tentativa de melhor entender as relações entre a maturação do sistema nervoso central do feto e suas implicações em seu padrão de comportamento. No presente artigo, os autores realizam uma revisão sobre o uso atual da ultrassonografia 4D na avaliação do comportamento fetal, discorrendo sobre as perspectivas da técnica em espelhar, por meio da observação de padrões de movimentos e expressões faciais, o desenvolvimento neurológico do feto, destacando as potenciais aplicabilidades dessa tecnologia como nova área de pesquisa em medicina fetal.
Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics, 2021
Preterm birth (PTB) is a major obstetric problem associated with high rates of neonatal morbidity and mortality. The prevalence of PTB has not changed in the last decade; thus, the establishment of a screening test and effective treatment are warranted. Transvaginal ultrasound measurement of the cervical length (TUCL) has been proposed as an effective method to screen pregnant women at a higher risk of experiencing PTB. Objective To evaluate the applicability and usefulness of second-trimester TUCL to predict PTB in a cohort of Portuguese pregnant women. Methods Retrospective cross-sectional cohort study including all singleton pregnant women who performed their second-trimester ultrasound (between weeks 18 and 22 + 6 days) from January 2013 to October 2017 at Centro Hospitalar Universitário São João. Results Our cohort included 4,481 women. The prevalence of spontaneous PTB was of 4.0%, with 0.7% occurring before the 34th week of gestation. The mean TUCL was of 33.8 mm, and percent...
Preterm labor is a regular occurrence in pregnancy; an estimated 15 million babies are born prematurely each year, with the number increasing. This was a prospective study of pregnant women who came to the Maternity Teaching Hospital in Erbil, Kurdistan Province, Iraq, for an outpatient clinic. On a manageable sample of 150 singleton pregnancies. In this study, one hundred fifty singleton asymptomatic pregnancies encountered the inclusion criteria during the study period, 69 primi gravid, 81 multi gravid. The correlation between the cervical length at 20-24 weeks and preterm delivery was moderately poor (r =0.715), and this correlation was highly significant (P < 0.001). In another word, a better correlation was found between preterm delivery and cervical length at 20-24 weeks than at 10-14 weeks in the prediction of preterm delivery. This study also points towards the importance of serial ultrasound scans to detect those who are at higher risk. There was no statistically significant effect of age, parity. Finally, the findings revealed that trans vaginal ultrasound is more accurate at 20-24weeks than 10-14weeks gestation for prediction of preterm labor, it can be used routinely to prevent preterm birth.
Preterm delivery and ultrasound measurement of cervical length in Gran Canaria, Spain
International Journal of Gynecology & Obstetrics, 2010
To study the relationship between cervical length measured by ultrasound and risk of preterm delivery.We measured cervical length in 2351 women between the 18th and 22nd week of pregnancy. Preterm delivery was categorized as before 37 weeks, before 34 weeks, and before 30 weeks.Before the 37th week, the odds ratios (ORs) of spontaneous delivery for cervical lengths in the 3rd, 5th, and 10th percentiles were, respectively, 25.47 (95% confidence intervals [CI], 15.5–41.73); 16.98 (95% CI, 11.51–25.05); and 7.55 (95% CI, 5.44–10.5). Before the 34th week the ORs were 28.7 (95% CI, 14.54–41.73); 20.5 (95% CI, 11.51-25.05); and 10.3 (95% CI, 5.44–10.5). And before the 30th week they were 29.8 (95% CI, 15.54–41.73); 23.1 (95% CI, 11.51–25.05); and 19.1 (95% CI, 7.44–31.5). In predicting premature delivery, the sensitivity, specificity, positive predictive value, and negative predictive value of cervical length were 26%, 98%, 63.6%, and 93.57% for the 3rd percentile; 34%, 97%, 51%, and 94% for the 5th percentile; and 39%, 92%, 31%, and 94% for the 10th percentile.Transvaginal measurement of cervical length during routine fetal morphological examination between the 18th and 22nd week of pregnancy helps identify asymptomatic women at risk for preterm delivery.
Preterm labor is the major cause of preterm birth that affects 12–18% of all births in India. Cervical shortening or effacement is one of the first steps in the parturition process. In the present study the mean cervical length at 11-14weeks for the term delivered group is 4.04+-0.35cms and the mean cervical length for the preterm delivered group 3.85±0.33 cms. The cervical length at 18-22 weeks was significantly shorter in the group that had preterm deliveries (2.77 cms) than in those who had term deliveries (3.74 cms) (P < 0.001). The cervical length at 18-22 weeks in the group that delivered preterm was significantly shorter than in those who had delivered at term. The mean cervical length showed a gradual decrease from the first to the second scan and an increased risk for preterm delivery was seen in those cases which demonstrated a rapid shortening in cervical length. Introduction Preterm birth, defined as birth at less than 37 weeks of gestation, is the most important single determinant of adverse infant outcome in terms of both survival and quality of life. Preterm deliveries present a problem, because of the several neonatal complications and the long term sequelae which includes cerebral palsy, developmental delay, chronic lung diseases, visual loss and hearing loss. Preterm labour is the major cause of preterm birth that affects 12 –18% of all births in India 1,2. Cervical length is considered as one of the key predictors of preterm delivery 3. Cervical length assessment by ultrasound is now routinely used during obstetric scan. Transvaginal scan (TVS) of the cervix is now considered as an important screening tool for preterm delivery. When cervical length (CL) on TVS is less than 15 mm, 40‐47% of these women will deliver within 7 days, irrespective of any interventions or use of tocolysis 4. In contrast, a CL ≥15mm is reassuring since less than 1‐2% will deliver within 7 days. In asymptomatic women, TVS of the cervix is most beneficial for the identification of women at low risk for preterm delivery 5. However, a short cervix detected by ultrasound around mid trimester increases the risk of preterm delivery in this group. Transvaginal cervical length
Sonographic measurement of cervical length in preterm prelabor amniorrhexis
Ultrasound in Obstetrics and Gynecology, 2004
K E Y W O R D S: cervical length; preterm premature rupture of membranes; ultrasound ABSTRACT Objective To determine whether sonographic measurement of cervical length in pregnancies complicated by preterm prelabor amniorrhexis helps distinguish between those women who deliver within 7 days and those who do not.
Online Brazilian Journal of Nursing, 2024
Objective: To identify and map the professional practice of nurse midwives regarding the use of ultrasound technology tools worldwide. Method: Scope review protocol according to the Joanna Briggs Institute (JBI) methodology and checklist Preferred Reporting Items for Systematic Reviews and Meta--Analyses extension for Scoping Reviews (PRISMA-ScR). The search strategy will be applied to the selected databases, and resolutions and opinions of the Federal Nursing Council (Cofen) and Regional Nursing Council of Minas Gerais (Coren-MG) will also be added. Two self-employed researchers will carry out the entire process of searching, evaluating, selecting, and extracting data, and if there are disagreements, a third reviewer will assist in the process. A table, elaborated by the researchers, will be used to extract the data. The results will be presented in a narrative form, with the support of tables and pictures. The protocol is registered at Open Science Framework (OSF): .
2020
Objective: To establish the prognostic usefulness of cervical length and uterine artery pulsatility index for imminent preterm delivery in symptomatic patients. Design: Case-control study. Setting: Central Hospital "Dr. Urquinaona ", Maracaibo, Venezuela. Participants: Patients with preterm delivery within 7 days (group A) and pregnant women with preterm delivery within more than 7 days (group B). Methods: Cervical length and uterine artery pulsatility index were determined at hospital admission and all were followed until delivery. Main outcome measures: General characteristics, cervical length, uterine artery pulsatility index, imminent preterm delivery, and prognostic efficacy. Results: 119 participants were assigned to group A and 362 patients to group B. Cervical length was lower in group A, and the uterine artery pulsatility index was higher compared with group B (p <0.0001). Cervical length showed an area under the curve of 0.972, while the uterine artery pulsati...