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https://www.readbyqxmd.com/read/28461768/cervical-elastography-during-pregnancy-clinical-perspectives
#1
REVIEW
Malgorzata Swiatkowska-Freund, Krzysztof Preis
Uterine cervix is a part of the uterus responsible for maintaining pregnancy till term. As long as the cervix remains long and firm and its internal orifice (os) is closed, it can withstand enlargement of the uterine contents and resultant growing pressure. Mechanical properties of the cervix change during pregnancy; the cervix ripens prior to delivery, then effaces and dilates with contractions of the uterus. Ripening of the cervix can be assessed using the Bishop score and ultrasonographically determined length of the cervical canal and internal os...
2017: International Journal of Women's Health
https://www.readbyqxmd.com/read/28258974/assessment-of-cervical-elastography-strain-pattern-and-its-association-with-preterm-birth
#2
Vera Oturina, Kerstin Hammer, Mareike Möllers, Janina Braun, Maria Karina Falkenberg, Kathrin Oelmeier de Murcia, Ute Möllmann, Maria Eveslage, Arrigo Fruscalzo, Walter Klockenbusch, Ralf Schmitz
OBJECTIVE: The aim of the study was to assess the cervical strain pattern by an ultrasound elastography cervix examination and to determine its association with preterm delivery. METHODS: In this study, 30 cases resulting in preterm birth and 30 gestational age-matched controls were included. A vaginal ultrasound examination with cervical length and elastography measurement was performed. We calculated four strain ratios (SR1-SR4) of the regions of interest (ROIs) arranged in pairs in four different positions on the anterior cervical lip...
March 4, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28217665/elastographic-measurement-of-the-cervix-during-pregnancy-current-status-and-future-challenges
#3
REVIEW
Hyunjung Kim, Han Sung Hwang
The cervix is a cylindrical structure that is proximally connected to the uterus and distally to the vaginal cavity. The Bishop score has been used to evaluate the cervix during pregnancy. However, alternatives have been evaluated because the Bishop score is uncomfortable for patients, relies on a subjective examination, and lacks internal os data. Elastography has been used to assess the cervix, as it can estimate tissue stiffness. Recent articles on elastography for cervical assessment during pregnancy have focused on its usefulness for prediction of preterm birth and successful labor induction...
January 2017: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/27645916/ep22-04-reference-cap-of-polyvinyl-alcohol-for-quantitative-elastography-of-the-human-uterine-cervix
#4
A Leonhard, P Sandager, C K Rasmussen, H Lene, N Uldbjerg
No abstract text is available yet for this article.
September 2016: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27259500/cervical-elastography-during-pregnancy-a-critical-review-of-current-approaches-with-a-focus-on-controversies-and-limitations
#5
REVIEW
Arrigo Fruscalzo, Edoardo Mazza, Helen Feltovich, Ralf Schmitz
In normal pregnancy, the cervix functions as a protective mechanical barrier that must remain tight and closed. Premature remodeling and consecutive shortening occur in many cases of spontaneous preterm birth. Although the complex underlying physiology of normal and abnormal cervical remodeling is not fully understood, it is clear that cervical softening occurs prior to delivery, and inappropriate timing seems to be associated with preterm delivery. Also, degree of cervical softness is a component of the Bishop score currently used clinically to predict successful induction of labor...
October 2016: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/26845371/tomoelastography-by-multifrequency-wave-number-recovery-from-time-harmonic-propagating-shear-waves
#6
Heiko Tzschätzsch, Jing Guo, Florian Dittmann, Sebastian Hirsch, Eric Barnhill, Korinna Jöhrens, Jürgen Braun, Ingolf Sack
Palpation is one of the most sensitive, effective diagnostic practices, motivating the quantitative and spatially resolved determination of soft tissue elasticity parameters by medical ultrasound or MRI. However, this so-called elastography often suffers from limited anatomical resolution due to noise and insufficient elastic deformation, currently precluding its use as a tomographic modality on its own. We here introduce an efficient way of processing wave images acquired by multifrequency magnetic resonance elastography (MMRE), which relies on wave number reconstruction at different harmonic frequencies followed by their amplitude-weighted averaging prior to inversion...
May 2016: Medical Image Analysis
https://www.readbyqxmd.com/read/26278635/assessment-of-the-cervix-in-pregnant-women-using-shear-wave-elastography-a-feasibility-study
#7
Marie Muller, Dora Aït-Belkacem, Mahdieh Hessabi, Jean-Luc Gennisson, Gilles Grangé, François Goffinet, Edouard Lecarpentier, Dominique Cabrol, Mickaël Tanter, Vassilis Tsatsaris
The quantitative assessment of the cervix is crucial for the estimation of pre-term delivery risk and the prediction of the success of labor induction. We conducted a cross-sectional study using shear wave elastography based on the supersonic shear imaging technique. The shear wave speed (SWS) of the lower anterior part of the cervix was quantified over an 8-mm region of interest in 157 pregnant women. Cervical SWS is slightly but significantly reduced in patients diagnosed with pre-term labor and in patients who actually delivered pre-term...
November 2015: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/26251994/transient-elastography-to-assess-the-cervical-ripening-during-pregnancy-a-preliminary-study
#8
L Peralta, F S Molina, J Melchor, L F Gómez, P Massó, J Florido, G Rus
Purpose: To explore the feasibility of transient elastography (TE) to quantify cervical stiffness changes during normal pregnancy and its spatial variability. Materials and Methods: TE was used to quantify the cervical stiffness in four anatomical regions. 42 women between 17 and 43 years of age and at 6 - 41 weeks of gestation were studied. The stiffness was related to gestational age at the time of examination, interval from ultrasound examination to delivery and cervical length to evaluate the potential of TE to assess cervical ripening...
August 7, 2015: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/26139036/-prediction-of-spontaneous-preterm-birth-in-symptomatic-patients-a-review
#9
REVIEW
C Compan, A Rossi, G Piquier-Perret, A Delabaere, F Vendittelli, D Lemery, D Gallot
OBJECTIVE OF THE REVIEW: To identify predictors of preterm delivery in the context of threatened preterm labour. MAIN POINTS: Tobacco use and previous history of preterm delivery are the main anamnestic elements to predict preterm birth. High positive predictive value of vaginal examination is restricted to cases with strong cervical alterations like dilatation over 4 cm. In case of discrete cervical alterations, literature confirms the great interest for cervical length ultrasonographic measurement as it reduces false positive cases...
October 2015: Journal de Gynécologie, Obstétrique et Biologie de la Reproduction
https://www.readbyqxmd.com/read/26044410/usefulness-of-elastography-in-predicting-the-outcome-of-foley-catheter-labour-induction
#10
Slawomir Wozniak, Piotr Czuczwar, Piotr Szkodziak, Tomasz Paszkowski
BACKGROUND: Incorrect selection of women for labour induction may increase the risk of caesarean section and other postpartum and neonatal complications. It has been recently shown that elastography of the uterine cervix holds the potential to predict the outcome of pharmacological labour induction. There are no data on the usefulness of elastography in predicting the outcome of mechanical induction of labour. AIM: To assess the usefulness of elastographic cervical assessment in predicting the success of Foley catheter labour induction...
June 2015: Australian & New Zealand Journal of Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/26011923/diagnostic-accuracy-of-cervical-elastography-in-predicting-labor-induction-success-a-systematic-review-and-meta-analysis
#11
REVIEW
Ambrogio P Londero, Ralf Schmitz, Serena Bertozzi, Lorenza Driul, Arrigo Fruscalzo
AIM: To determine the accuracy of cervical elastography in predicting labor induction success. MATERIALS AND METHODS: A systematic search, review, and meta-analysis of observational studies published in English language between January 2000 and October 2014 was performed. It included studies considering cervix sonoelastography as the index test and successful labor or vaginal delivery as the reference standard. As cervix length and Bishop score were considered comparator tests, the quality of the included studies was assessed using quality assessment tool for diagnostic accuracy studies (QUADAS) tool...
March 2016: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/26003483/a-hertzian-contact-mechanics-based-formulation-to-improve-ultrasound-elastography-assessment-of-uterine-cervical-tissue-stiffness
#12
Brandi N Briggs, Michael E Stender, Patrick M Muljadi, Meghan A Donnelly, Virginia D Winn, Virginia L Ferguson
Clinical practice requires improved techniques to assess human cervical tissue properties, especially at the internal os, or orifice, of the uterine cervix. Ultrasound elastography (UE) holds promise for non-invasively monitoring cervical stiffness throughout pregnancy. However, this technique provides qualitative strain images that cannot be linked to a material property (e.g., Young's modulus) without knowledge of the contact pressure under a rounded transvaginal transducer probe and correction for the resulting non-uniform strain dissipation...
June 25, 2015: Journal of Biomechanics
https://www.readbyqxmd.com/read/25791058/challenging-the-in-vivo-assessment-of-biomechanical-properties-of-the-uterine-cervix-a-critical-analysis-of-ultrasound-based-quasi-static-procedures
#13
M M Maurer, S Badir, M Pensalfini, M Bajka, P Abitabile, R Zimmermann, E Mazza
Measuring the stiffness of the uterine cervix might be useful in the prediction of preterm delivery, a still unsolved health issue of global dimensions. Recently, a number of clinical studies have addressed this topic, proposing quantitative methods for the assessment of the mechanical properties of the cervix. Quasi-static elastography, maximum compressibility using ultrasound and aspiration tests have been applied for this purpose. The results obtained with the different methods seem to provide contradictory information about the physiologic development of cervical stiffness during pregnancy...
June 25, 2015: Journal of Biomechanics
https://www.readbyqxmd.com/read/25781664/strain-at-the-internal-cervical-os-assessed-with-quasi-static-elastography-is-associated-with-the-risk-of-spontaneous-preterm-delivery-at-%C3%A2-34-weeks-of-gestation
#14
Edgar Hernandez-Andrade, Maynor Garcia, Hyunyoung Ahn, Steven J Korzeniewski, Homam Saker, Lami Yeo, Tinnakorn Chaiworapongsa, Sonia S Hassan, Roberto Romero
AIM: To evaluate the association between cervical strain assessed with quasi-static elastography and spontaneous preterm delivery. METHODS: Quasi-static elastography was used to estimate cervical strain in 545 pregnant women with singleton pregnancies from 11 weeks to 28 weeks of gestation. Cervical strain was evaluated in one sagittal plane and in the cross-sectional planes of the internal cervical os and external cervical os. The distribution of strain values was categorized into quartiles for each studied region and their association with spontaneous preterm delivery at ≤34 weeks and at <37 weeks of gestation was evaluated using logistic regression...
November 2015: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/25775282/-elastography-assessment-of-the-cervix-during-cervical-maturation
#15
COMPARATIVE STUDY
Dimassi Kaouther, Ami Olivier
BACKGROUND: The issue of cervical tissue imaging is to enable the provision of Obstetricians an objective tool for measuring cervical changes more accurate than the vaginal touch. Hitachi software "Real-time Tissue Elastography" allows an analysis of tissue elasticity, evaluated on a Young's modulus theory. This imagery evaluated for mammary tumors and liver changes elasticity, would objectively show changes in cervical consistency. AIMS: The authors of the following work have attempted to: - Assess the usefulness of elastography in the uterine cervix examination...
July 2014: La Tunisie Médicale
https://www.readbyqxmd.com/read/25766389/mechanical-assessment-of-cervical-remodelling-in-pregnancy-insight-from-a-synthetic-model
#16
L Peralta, G Rus, N Bochud, F S Molina
During the gestation and the cervical remodelling, several changes occur progressively in the structure of the tissue. An increase in the hydration, disorganisation of collagen network and decrease in elasticity can be observed. The collagen structure disorganisation is particularly complex: collagen fibres turn thicker and more wavy as the gestation progresses in a transition from relatively straight fibres to wavy fibres, while pores between collagen fibres become larger and separated. Shear wave elastography is a promising but not yet fully understood tool to assess these structural changes and the cervix׳s ability to dilate...
June 25, 2015: Journal of Biomechanics
https://www.readbyqxmd.com/read/25734411/cervical-strain-elastography-in-pregnancy-and-association-with-maternal-factors
#17
Gabriele Meyberg-Solomayer, Christoph Gerlinger, Amr Hamza, Frederike Schlaegel, Zoltan Takacs, Erich Franz Solomayer
Purpose To assess cervical elasticity in different regions by sonoelastography, to compare the results to the Bishop score, cervical length, week of pregnancy and other maternal factors (age, weight, parity) and to evaluate the reproducibility of the method. Materials and Methods 131 patients between 17 - 41 gestational weeks were examined by transvaginal cervical strain elastography. In the sagittal view strain values were calculated in 7 regions of interest (ROI; external and internal os anterior/posterior, middle part anterior/posterior, cervical canal)...
January 2017: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/25666343/cervical-hi-rte-elastography-and-pregnancy-outcome-a-prospective-study
#18
Laura Sabiani, Jean-Baptiste Haumonte, Anderson Loundou, Anne-Sophie Caro, Julie Brunet, Jean-Francois Cocallemen, Claude D'ercole, Florence Bretelle
OBJECTIVE: To study cervix elastography measurement and its relation with pregnancy outcome. DESIGN: A two year prospective longitudinal study evaluated cervical elasticity by HI-RTE (Hitachi real-time tissue elastography) imaging during three trimesters of pregnancy. The main outcome measure was elastography index the cervical elastogram color-coded. RESULTS: Three hundred eighty seven measurements were realized among 72 pregnant women prospectively enrolled...
March 2015: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/25472166/117-in-vivo-evaluation-of-the-cervical-stiffness-evolution-during-induced-labor-in-ewes-using-elastography
#19
L Peralta, E Mourier, C Richard, P Chavette-Palmer, M Muller, M Tanter, G Rus
Despite numerous advances and intensive research in perinatal medicine, spontaneous preterm birth (PTB) is the leading global cause of neonatal mortality and morbidity. On the other hand, labour has to be induced in ~23% of pregnancies worldwide. Both issues may be related to the distensibility of the cervical tissue. Quantitative and objective monitoring of the cervix ripening may provide a complementary method to identify cases at risk of PTB and assess the likelihood of successful induction of labour. Currently, however, no reliable clinical tools for such a quantitative and objective evaluation exist...
December 2014: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/25458805/-elastography-of-cervix-to-predict-delay-from-induction-to-delivery
#20
L Sonnier, P Bouhanna, C Arnou, P Rozenberg
OBJECTIVE: Induction of labor for medical indications has become a routine practice. To date, the Bishop score remains as the standard method to predict the duration of induced labor. Elastography is an objective method of assessing the relative consistency of tissues. Therefore, we sought to assess strain elastography of cervix to predict delay from induction to delivery in pregnant women with a low Bishop score. PATIENTS AND METHODS: Ultrasound elastography was immediately performed before induction of labor for medical indications among patients with a singleton pregnancy at>36 weeks of gestation and a Bishop score<6...
December 2014: Gynécologie, Obstétrique & Fertilité
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