Cervical length for predicting preterm birth and a comparison of ultrasonic measurement techniques

O'Hara, Sandra; Zelesco, Marilyn; Sun, Zhonghua

doi:10.1002/j.2205-0140.2013.tb00100.x

Cited by 32 publications

(33 citation statements)

References 35 publications

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“…The TPU CL technique has not been wellstudied and should be reserved only for women at an increased risk for sPTB whose TAUCLimagingisinadequateortheTAU CLr35 mm, and in whom vaginal assessment is unavailable or unacceptably invasive or uncomfortable (eg, a history of vaginismus or sexual trauma). 16 Recommendation #1:…”

Section: Tpumentioning

confidence: 99%

Cervical Length Screening in Asymptomatic Women at High Risk and Low Risk for Spontaneous Preterm Birth

Orzechowski

Boelig

Berghella

2016

Clinical Obstetrics &Amp; Gynecology

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Cervical length (CL) screening should be offered to singletons because there are interventions for those with a short CL. A transvaginal ultrasound (TVU) is the ''gold standard'' for CL. In singletons with prior spontaneous preterm birth, serial TVU CL screening isrecommended between16and236/7weeks. Universal TVU CL screening between 18 and 24 weeks may be considered for low-risk singletons with the administration of vaginal progesterone for TVU CLr20 mm; alternatively, transabdominal ultrasound CL screening may be considered with reflux to TVU CL screening for a transabdominal ultrasound CL<35 mm or inadequate visualization. CL screening is not recommended in multiples.

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Section: Tpumentioning

confidence: 99%

Cervical Length Screening in Asymptomatic Women at High Risk and Low Risk for Spontaneous Preterm Birth

Orzechowski

Boelig

Berghella

2016

Clinical Obstetrics &Amp; Gynecology

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“…Routine transvaginal assessment of cervical length is required for any patient considered to be at high risk for preterm delivery. Risk factors may include multiple pregnancy, history of previous preterm delivery (prior to 37 weeks gestation), cervical cerclage, use of assisted reproductive techniques, antepartum bleeding, uterine anomalies, fetal anomalies, polyhydramnios, infection, demographic factors (low socioeconomic status, single marital status, low level of education, young patient or advanced maternal age) and lifestyle issues (cigarette smoking, illicit drug use, stress, physical abuse and inadequate prenatal care) …”

Section: Methodsmentioning

confidence: 99%

“…There is however much debate on how best to assess low‐risk women; whether these women should all have a cervical length measured transvaginally at the mid‐trimester scan or if screening with a transabdominal approach is appropriate in identifying those women that would benefit from transvaginal assessment …”

Section: Introductionmentioning

confidence: 99%

Is the current measurement criteria appropriate for selecting women who require transvaginal assessment of cervical length in a low-risk population?

Harrington

2014

Sonography

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Introduction The aim of this study was to assess the number of low‐risk women in our population that would require transvaginal examination of cervical length on the basis of current transabdominal screening criteria. Also, if the currently used length of 35 mm transabdominally (at 12–40 weeks gestational age) could be lowered while still accurately identifying all cervical lengths that would be less than 25 mm measured transvaginally. Method Over a 3‐month period, all patients presenting for obstetric scanning between 12 and 40 weeks gestation were included in the study. Details to be recorded included sonographer initials, scan date, patient identification number, gestational age, transabdominal cervical length, transvaginal cervical length and relevant risk factors. Patients who were subsequently identified as being high risk for preterm delivery were excluded from the data analysis. Results Recent literature suggests that using a cut‐off length of 36 mm transabdominally for a well‐visualized cervix will result in a 40% reduction of women requiring transvaginal examinations of cervical length at the mid‐trimester scan. Our current practice protocol is to use a similar cut‐off of 35 mm measured transabdominally less than which transvaginal assessment of cervical length is indicated. It was found that only 13% of low‐risk women in our practice required a transvaginal scan for cervical length (a reduction of 87%) at the mid‐trimester scan. At 12–40 weeks gestational age, using a transabdominal cut‐off as low as 25 mm would have allowed for the identification of all patients in the study group with transvaginal measurements of less than 25 mm. Discussion Across 12–40 weeks gestational age, an average of 17% of women required transvaginal assessment of cervical length on the basis of current criteria. Allowing for measurement error practice protocol could be amended to using a transabdominal cut‐off of 30 mm at all gestational ages when deciding which patients would benefit from transvaginal assessment of cervical length.

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“…The main clinical parameter taken into consideration is represented by the cervical length measured during the beginning of the third trimester (weeks 25 to 28). Clinical observation has shown that patients that present a cervical length less than 25 mm are indicative of high risk situations (preterm birth risk) whereas patient with cervical length over 25 mm are indicative of low risk situations (normal recordings) [19]. Based on these parameters the database was divided into two groups: the control group which consists of 64 normal recordings and the study group with 48 pathological or suspicious recordings of high preterm birth risk.…”

Section: Databasementioning

confidence: 99%

Antepartum Fetal Monitoring and Spectral Analysis of Preterm Birth Risk

Păsăricără

Nemescu

Arotăriței

et al. 2017

J. Phys.: Conf. Ser.

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On the multidimensional inverse problem of spectral analysis V V Dubrovskii -Low-complexity intrauterine pressure estimation using the Teager energy operator on electrohysterographic recordings Michael J Rooijakkers, Chiara Rabotti, S Guid Oei et al. Abstract. The monitoring and analysis of antepartum fetal and maternal recordings is a research area of notable interest due to the relatively high value of preterm birth. The interest stems from the improvement of devices used for monitoring. The current paper presents the spectral analysis of antepartum heart rate recordings conducted during a study in Romania at the Cuza Voda Obstetrics and Gynecology Clinical Hospital from Iasi between 2010 and 2014. The study focuses on normal and preterm birth risk subjects in order to determine differences between these two types or recordings in terms of spectral analysis. IntroductionPreterm birth risk is an issue of interest for health care professionals given the most recent European statistics presented in the European Perinatal Health Report 2010 [1], which show rates is between 5 and 10% for all European countries, and 8% for Romania. A method used due to the advancement of technology is fetal and maternal monitoring that can be done both invasively and non-invasively. Of course, non-invasively techniques are desired due to the low risk involved for both the mother and the child. These devices are attached to the patient's abdomen and acquire data from the mother and the fetus. The data acquired can vary, but the main signals are the fetal and maternal heart rate and the maternal uterine contractions [2]. Long term monitoring of these parameters during the later stages of pregnancy, the third trimester, can be used as a screening technique in order to reduce preterm birth risk. The monitoring technique is always accompanied by the expertise of health care professionals [3]. The results presented in this paper represent the spectral analysis of antepartum recordings of fetal and maternal heart rate (FHR and MHR) during the third trimester of pregnancy. The analysis focuses on both normal and preterm birth risk recordings in order to determine the differences between the two types of recordings. The spectral analysis method is well established as a reliable method for identifying relevant information from HR recordings [4]. The method can be used for long term recordings, such as those acquired during fetal and maternal monitoring. The purpose is to show the efficiency of this type of clinical practice as a complimentary procedure to standard testing such as echography during key stages of pregnancy and close observation from health care specialists.

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Cervical length for predicting preterm birth and a comparison of ultrasonic measurement techniques

Cited by 32 publications

References 35 publications

Cervical Length Screening in Asymptomatic Women at High Risk and Low Risk for Spontaneous Preterm Birth

Cervical Length Screening in Asymptomatic Women at High Risk and Low Risk for Spontaneous Preterm Birth

Is the current measurement criteria appropriate for selecting women who require transvaginal assessment of cervical length in a low-risk population?

Antepartum Fetal Monitoring and Spectral Analysis of Preterm Birth Risk

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