scholarly journals Reference Ranges for Ultrasonographic Measurements of the Uterine Cervix in Low-Risk Pregnant Women

2017 ◽  
Vol 39 (09) ◽  
pp. 443-452 ◽  
Author(s):  
Kleber Andrade ◽  
Thaísa Bortoletto ◽  
Cristiane Almeida ◽  
Renan Daniel ◽  
Heloísa Avo ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Uterine Cervix ◽  
Transvaginal Ultrasound ◽  
Cervical Length ◽  
T Test ◽  
Low Risk ◽  
Reference Ranges ◽  
Mean Values ◽  
Reference Curves ◽  
Dependent Samples

Objective To define transvaginal ultrasound reference ranges for uterine cervix measurements according to gestational age (GA) in low-risk pregnancies. Methods Cohort of low-risk pregnant women undergoing transvaginal ultrasound exams every 4 weeks, comprising measurements of the cervical length and volume, the transverse and anteroposterior diameters of the cervix, and distance from the entrance of the uterine artery into the cervix until the internal os. The inter- and intraobserver variabilities were assessed with the linear correlation coefficient and the Student t-test. Within each period of GA, 2.5, 10, 50, 90 and 97.5 percentiles were estimated, and the variation by GA was assessed with analysis of variance for dependent samples. Mean values and Student t-test were used to compare the values stratified by control variables. Results After confirming the high reproducibility of the method, 172 women followed in this cohort presented a reduction in cervical length, with an increase in volume and in the anteroposterior and transverse diameters during pregnancy. Smaller cervical lengths were associated with younger age, lower parity, and absence of previous cesarean section (C-section). Conclusion In the studied population, we observed cervical length shortening throughout pregnancy, suggesting a physiological reduction mainly in the vaginal portion of the cervix. In order to better predict preterm birth, cervical insufficiency and premature rupture of membranes, reference curves and specific cut-off values need to be validated.

scholarly journals Assessment of Length of Maternal Cervix between 18 and 24 weeks of Gestation in a Low-Risk Brazilian Population

2017 ◽  
Vol 39 (12) ◽  
pp. 647-652
Author(s):  
Soraya Andrade ◽  
Fernando Andrade ◽  
Edward Araujo Júnior ◽  
Cláudio Pires ◽  
Rosiane Mattar ◽  
...  
Keyword(s):  
Linear Regression ◽  
Pregnant Women ◽  
Gestational Age ◽  
Polynomial Regression ◽  
Transvaginal Ultrasound ◽  
Cervical Length ◽  
Low Risk ◽  
Cross Sectional ◽  
Significant Difference ◽  
The Ideal

Purpose To determine cervical biometry in pregnant women between 18 and 24 weeks of gestation and the ideal mode of measurement of cervical length in cases of curved and straight cervical morphology. Methods The uterine cervices of 752 low-risk pregnant women were assessed using transvaginal ultrasound in a prospective cross-sectional study. In women with straight uterine cervices, cervical biometry was performed in a continuous manner. In women with curved uterine cervices, the biometry was performed using both the continuous and segmented techniques (in segments joining the cervical os). Polynomial regression models were created to assess the correlation between the cervical length and gestational age. The paired Student t-test was used to compare measuring techniques. Results The cervical biometry results did not vary significantly with the gestational age and were best represented by linear regression (R2 = 0.0075 with the continuous technique, and R2 = 0.0017 with the segmented technique). Up to the 21st week of gestation, there was a predominance of curved uterine cervix morphology (58.9%), whereas the straight morphology predominated after this gestational age (54.2%). There was a significant difference between the continuous and the segmented measuring methods in all the assessed gestational ages (p < 0.001). Conclusion Cervical biometry in pregnant women between 18 and 24 weeks was represented by a linear regression, independently of the measuring mode. The ideal measuring technique was the transvaginal ultrasound performed at a gestational age ≥21 weeks.

The comparison of USG measured cervical length in pregnant women with previous induced abortion versus those who have not had an induced abortion

2019 ◽  
Vol 8 (10) ◽  
pp. 4024
Author(s):  
Harshita Naidu ◽  
Nivedita Hegde ◽  
Anjali M. ◽  
Rohini Kanniga ◽  
Akhila Vasudeva
Keyword(s):  
Pregnant Women ◽  
Preterm Delivery ◽  
Transvaginal Ultrasound ◽  
Induced Abortion ◽  
Cervical Length ◽  
Care Hospital ◽  
Spontaneous Preterm Delivery ◽  
Increased Risk ◽  
Significant Difference ◽  
History Of

Background: The majority of women who undergo induced abortion are young and of low parity. Hence, it is desirable to look for any association effects of induced abortion with future reproductive outcomes. In this study, we aim to compare ultrasound measured cervical length in pregnant women with previous induced abortion versus those who have not had an induced abortion.Methods: This was a prospective observational study performed at tertiary care hospital. Total of 400 patients were recruited, divided into two groups. Patients with an induced abortion in previous pregnancy were included as cases and those with no history were taken as controls. Cervical length was measured by transvaginal ultrasound in all participants at 11-14, 18-22 and 28-32 weeks. Pregnancies were followed up to note incidence of spontaneous preterm delivery, preterm pre labour rupture of membranes (PPROM), threatened preterm, and second trimester miscarriage.Results: Authors have found that there was no significant difference in the cervical length of pregnant patients with or without a history of prior induced abortions.  In our study authors found that mean cervical length at 11-14weeks, 18-22 weeks, and 28-32 weeks was 3.47±0.126cm and 3.48±0.195cm; 3.44±0.296cm and 3.49±0.182cm; 3.36±0.477cm and 3.42±0.310cm respectively among cases and controls. However, there was a demonstrably increased risk of spontaneous preterm delivery, PPROM and threatened preterm in patients with a history of prior induced abortion.Conclusions: Authors conclude that previous induced abortion increases the risk of threatened preterm, PPROM, spontaneous preterm delivery in the subsequent pregnancy. But, this risk is not predictable by measuring cervical length as the mean cervical length remained the same in both the groups.

Fetal Heart Function by Tricuspid Annular Plane Systolic Excursion and Ventricular Shortening Fraction Using STIC M-Mode: Reference Ranges and Validation

2017 ◽  
Vol 34 (13) ◽  
pp. 1354-1361 ◽  
Author(s):  
Giselle Tedesco ◽  
Marilim de Souza Bezerra ◽  
Fernanda Barros ◽  
Wellington Martins ◽  
Luciano Nardozza ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Polynomial Regression ◽  
Heart Function ◽  
Left Ventricular ◽  
Image Correlation ◽  
Coefficient Of Determination ◽  
Reference Ranges ◽  
Concordance Correlation ◽  
Reference Curves ◽  
Cardiac Volumes

Objective To determine the reference values for fetal tricuspid annular plane systolic excursion (f-TAPSE) and fetal ventricular shortening fraction (f-VSF) using spatiotemporal image correlation (STIC) with M-mode, and validate these curves in fetuses of pregnant women with preexisting diabetes mellitus (DM) and with intrauterine growth restriction (IUGR). Study Design Crosssectional study assessed 300 fetal cardiac volumes of normal pregnancies between 20 and 33 + 6 weeks of gestation. For the construction of the reference curves, we used a polynomial regression model adjusted with the coefficient of determination (R2). For the calculation of reproducibility, the concordance correlation coefficient (CCC) was used. Results f-TAPSE value correlated with gestational age (GA, R2 = 0.46), whereas fetal right ventricular shortening fraction (f-RVSF, R2 = 0.02) and fetal left ventricular shortening fraction (f-LVSF, R2 = 0.005) did not vary with GA. Fetuses of pregnant women with preexisting DM (30) had lower values of f-RVSF (p = 0.028), f-LVSF (p = 0.001), and f-TAPSE (p = 0.009) than normal fetuses. The f-TAPSE values were lower (p = 0.005) in IUGR group (17). The f-TASPSE values showed adequate reliability as well as good intra and interobserver concordance (CCC = 0.95 and 0.79, respectively). Conclusion The reference ranges for f-TAPSE, f-RVSF, and f-LVSF using the STIC M-mode were established and had good reproducibility for f-TAPSE measurements.

Wybrane zagadnienia położnicze: stosowanie leczenia tokolitycznego po przedwczesnym przerwaniu błon płodowych oraz znaczenie oceny długości szyjki macicy w przezpochwowym badaniu ultrasonograficznym

2018 ◽  
Vol 21 (2) ◽  
Author(s):  
Grażyna Jarząbek-Bielecka ◽  
Paulina Wojtyła-Buciora ◽  
Magdalena Pisarska-Krawczyk ◽  
Witold Kędzia ◽  
Dawid Luwański ◽  
...  
Keyword(s):  
Health Care ◽  
Pregnant Women ◽  
Transvaginal Ultrasound ◽  
Care Center ◽  
Family Doctor ◽  
Cervical Length ◽  
Daily Work ◽  
Health Care Center ◽  
The Family ◽  
Work Family

In our health care system, family doctor is the first physician that patients have contact with. Family medicine provides basic health care. In his daily work, family doctor independently consults both children and adults regardless of the reason of visit, if necessary, cooperating with consulting physicians working in outpatient specialist centers or referring patients for diagnosis and treatment in specialist centers (hospitals). This also applies to pregnant women. Two specific issues requiring consultation with gynecology clinics are discussed: tocolytic treatment after premature rupture of membranes and the importance of assessing cervical length in transvaginal ultrasound. When discussing obstetric problems from the family doctor’s perspective, the importance of education should be emphasized. The basis of prenatal education for pregnant women, including high-risk pregnant women, consists of an education plan developed by a midwife working in the Primary Health Care Center. The plan is an integral part of the patient’s medical record and includes both practical and theoretical preparation for childbirth, puerperium, breastfeeding and parenting (also in case of group services).

Reference ranges for ultrasound measurements of fetal kidneys in a cohort of low-risk pregnant women

2019 ◽  
Vol 299 (2) ◽  
pp. 585-591
Author(s):  
Ricardo M. Barbosa ◽  
Renato T. Souza ◽  
Carla Silveira ◽  
Kleber C. Andrade ◽  
Cristiane M. Almeida ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Low Risk ◽  
Reference Ranges ◽  
Ultrasound Measurements

Prediction of Preterm Delivery by Late Cervical Length Measurement after 24 Weeks

2015 ◽  
Vol 38 (3) ◽  
pp. 200-204 ◽  
Author(s):  
Ioannis Papastefanou ◽  
Athanasios Pilalis ◽  
Makarios Eleftheriades ◽  
Athena P. Souka
Keyword(s):  
Preterm Delivery ◽  
Transvaginal Ultrasound ◽  
False Positive Rate ◽  
Cross Sectional Study ◽  
Cervical Length ◽  
Low Risk ◽  
Cross Sectional ◽  
Spontaneous Preterm Delivery ◽  
Positive Rate ◽  
Singleton Pregnancies

Objective: To examine the value of the cervical length (CL) measurement at 24-30 gestational weeks in the prediction of spontaneous preterm delivery (SPD) between 30 and 34 weeks (SPD34) and between 34 and 37 weeks (SPD37). Methods: We performed a prospective cross-sectional study. CL was measured once by transvaginal ultrasound examination between 24 and 30 weeks. Results: The study sample consisted of 1,180 low-risk singleton pregnancies. 10 women (0.85%) had a SPD34 and 60 (5.08%) had a SPD37. CL was shorter (p < 0.001) in the women who had a SPD34 (median 11 mm) compared to the women who delivered after 34 weeks (median 31 mm). CL was shorter (p < 0.001) in the women who had a SPD37 (median 22 mm) compared to the women who delivered after 37 weeks (median 31 mm). CL predicted SPD34 (OR = 0.837, R2 = 0.2768, AUC = 0.9406, p < 0.001) and SPD37 (OR = 0.907, R2 = 0.1085, AUC = 0.7584, p < 0.001). The model achieved a sensitivity of 70.0 and 38.3% for 10% false-positive rate for SPD34 and SPD37, respectively. Conclusions: CL after 24 weeks is significantly shorter in women destined to have a SPD. In low-risk singleton pregnancies CL performs very well in predicting SPD34 and adequately in predicting SPD37.

scholarly journals INFLUÊNCIA DA DISTÂNCIA NA EXATIDÃO DA CUBAGEM NÃO DESTRUTIVA DE QUALEA SP. NO BIOMA AMAZÔNIA

Nativa ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 663-670
Author(s):  
Rafaella De Angeli Curto ◽  
Arthur Faganello Teodoro Dos Anjos ◽  
Emanuel José Gomes De Araújo ◽  
Charlote Wink ◽  
Sintia Valerio Kohler
Keyword(s):  
Residual Analysis ◽  
T Test ◽  
Mean Values ◽  
Significant Difference ◽  
Standing Trees ◽  
The Mean ◽  
Dependent Samples ◽  
Non Destructive

Objetivou-se avaliar o efeito da distância na exatidão do dendrômetro digital Criterion RD 1000®, na estimativa do diâmetro e volume de Qualea sp. no bioma Amazônia. Foram selecionadas 30 árvores e cubadas pelo método de Smalian até a altura comercial com escalada e com Criterion RD 1000®, nas distâncias entre observador e a árvore de 11 m, 13 m, 15 m e à maior distância que o observador conseguiu instalar o equipamento em relação a árvore. Para avaliar o diâmetro ao longo do fuste, o volume comercial e por segmento, realizou-se o teste t pareado, com 95% de probabilidade, a análise de resíduos e as estatísticas complementares. Não houve diferença significativa entre os valores médios das variáveis analisadas, obtidos com a escalada e os estimados pelo Criterion. Houve menor amplitude dos resíduos nas seções inferiores do fuste com tendência em subestimar os menores diâmetros. As estatísticas complementares demonstraram maiores erros quando o equipamento estava mais próximo da árvore e menores quando estava a 15 m, correspondendo a uma distância superior à média da altura comercial das árvores. O equipamento permitiu estimar com exatidão diâmetros e volumes de árvores em pé, viabilizando a cubagem não destrutiva de Qualea sp. no bioma Amazônia.  Palavras-chave: mensuração; volumetria; Criterion RD 1000®.   INFLUENCE OF DISTANCE ON THE ACCURACY OF THE NON-DESTRUCTIVE OF Qualea sp. IN THE AMAZON BIOME   ABSTRACT: The objective was to evaluate the effect of distance on the accuracy of the digital dendrometer Criterion RD 1000®, on the estimate of the diameter and volume of Qualea sp. in the Amazon biome. Thirty trees were selected and scaled by the Smalian method to commercial height with climbing and with a Criterion RD 1000®, in the distances between the observer and the 11 m, 13 m, 15 m and the longest distance that the observer managed to install the equipment in relation to the tree. To analyze diameter along the stem, commercial volume and volume per segment, the t test for dependent samples was performed, with a 95% probability, as well as residual analysis and complementary statistics. There was no significant difference between the mean values ​​of the variables analyzed, obtained with the climb and estimated with a Criterion. There was a smaller amplitude of residues in the lower sections of the stem with tendency to underestimate smaller diameters. The complementary statistics showed greater errors with the equipment closest to the tree and smaller when it was 15 m away, corresponding to a distance greater than the average commercial height of the trees. The equipment made it possible to accurately estimate the diameters and volumes of standing trees, enabling the non-destructive scaling of Qualea sp. in the Amazon biome forest. Keywords: measurement; volumetry; Criterion RD 1000®.

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