Use of a high‐frequency linear transducer and MTI filtered color flow mapping in the assessment of fetal heart anatomy at the routine 11 to 13 + 6‐week scan: a randomized trial

Votino, Carmela; Kacem, Y.; Dobrescu, Oana Gabriela; Dessy, Hugues; Cos, T.; Foulon, Walter; Jani, Jacques

doi:10.1002/uog.9015

Cited by 14 publications

(25 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the combined use of HFLT and CCT improved successful examination of some optional anatomical structures including lens, three-vessel view, left ventricular outflow tract, umbilical artery and kidneys, the final success rate of cardiac examination was just around 50% which was not high. Our findings on cardiac assessment was similar to a previous study by Votini et al that using HFLT alone without colour flow mapping did not improve cardiac assessment [16]. Our result on success rate on cardiac assessment was also similar to the study by Ebrashy et al that the fetal heart was not properly visualized in 42% using both transabdominal and transvaginal sonography without colour flow mapping [8].…”

Section: Discussionsupporting

confidence: 91%

“…In literature search, the first paper on the use of HFLT was published in 1981, reporting the use of HFLT in examining neonatal intracranial pathology [10]. HFLT have been used for the examination of smaller structures in radiology [11], internal medicine [12] and recently used more in obstetrics [13]- [16]. According to American Institute of Ultrasound in Medicine, a 3 -5 mega Hertz (MHz) abdominal transducer will usually provide sufficient penetration while providing adequate resolution in most patients, however, in early pregnancy, HFLT with higher frequency like 5 MHz abdominal transducer may improve resolution while allowing adequate penetration [17].…”

Section: Introductionmentioning

confidence: 99%

“…However, a subsequent randomized trial showed that the use of a high-frequency (at 7.5 MHz) linear transducer alone without colour flow mapping did not improve visualization of cardiac anatomy [16], probably because of its limited penetration, given that the visibility of cardiac anatomy was inversely correlated with the transducer-heart distance [16].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Use of a High Frequency Linear Transducer in the Assessment of Fetal Anatomy at the Routine 11 to 13 + 6-Week Scan among Chinese Population

Mak¹,

Kou²,

Poon³

et al. 2015

OJOG

View full text Add to dashboard Cite

Objectives: To determine if the use of high frequency linear transducer (HFLT) in addition to conventional curvilinear transducer (CCT) aids assessment of fetal cardiac and non-cardiac anatomy in the first trimester. Methods: Transabdominal CCT (4 -8 MHz) followed by HFLT (9 MHz) was used to study prospectively the visualization rate of basic and optional anatomical structures according to international guidelines. McNemar and Chi-square test were used to compare correlated and independent proportions respectively. Postnatal outcomes were traced. Results: Comparing with CCT alone, additional use of HFLT did not improve the completion rate of basic anomaly screen (95.0% vs. 97.0%, p = 0.5) in the 101 women studied, but it improved the visualization rate of some optional structures including lens (57.4% vs. 73.3%), three-vessel view (3 VV) (17.8% vs. 48.5%), left ventricular outflow tract (17.8% vs. 51.5%), kidneys (8.9% vs. 47.5%), and umbilical artery (86.1% vs. 93.1%) (all p < 0.05). Favourable fetal position was associated with a better visualisation of four-chamber view and 3VV (p < 0.05). Conclusions: Our findings supported that the use of HFLT in addition to CCT does not improve the completion of basic anomaly screen, nor does it achieve a high visualisation rate of different cardiac views in the first trimester.

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Use of a High Frequency Linear Transducer in the Assessment of Fetal Anatomy at the Routine 11 to 13 + 6-Week Scan among Chinese Population

Mak¹,

Kou²,

Poon³

et al. 2015

OJOG

View full text Add to dashboard Cite

show abstract

“…This seems to be a characteristic of first trimester heart scan [16,17]. We acquired also a mean examination time significantly smaller (3-4 minutes) than previous published results, which vary from less than 5 to 15-20 minutes, but with the same visualization rate [2,3,17,21,26]. Thus, our result may occur because of the use of the ultrasound machine cine-loop facility and by studying a smaller number of fetal heart parameters.…”

Section: Figmentioning

confidence: 48%

“…Even if a detailed examination is not possible with current ultrasound technology, a basic assessment of the fetal heart at 11 to 14 weeks of gestation has been used mainly in high-risk patients [1,2] and some groups have investigated its routine incorporation into the first-trimester scan [3,4].…”

mentioning

confidence: 99%

Variation of safety indices during in the learning curve for color Doppler assessment of the fetal heart at 11+0 to 13+6 weeks’ gestation

2015

View full text Add to dashboard Cite

Aims: The aim of our study was to analyze the variation of acoustic output, as expressed by the thermal (TI) and mechanical index (MI), during the learning curve for a fetal heart scan at 11-13 gestational weeks, with the introduction of a new ultrasound system. Material and methods: This was a prospective, observational study on 303 normal fetuses. The fetal heart was examined transabdominally using B-Mode and high definition (HD) color Doppler to obtain standard parameters: fourchamber, outflow tracts and three-vessel-trachea views. Data were analyzed in groups of 20 consecutive examinations and the percentage of successful examinations was calculated. TI and MI were retrieved from HD color Doppler examinations of the fetal heart and from pulsed-wave Doppler assessment of the tricuspid flow and ductus venosus. Results: MI values from the color Doppler examination of the fetal heart showed a continuous decrease (0.81 to 0.75, p<0.001), along the learning phase. TI and MI indices from pulsed-wave Doppler evaluation of the tricuspid flow increased at the beginning of the learning phase and stabilized afterwards (0.34 to 0.36, p<0.05 and 0.37 to 0.4, p<0.001, respectively). TI from color Doppler exam of the heart and indices from ductus venosus assessment were very constant and did not change along the studied periods. The length of Doppler examination of the heart increased after about 80 cases by 25%, to a mean of 4 minutes (p<0.05). Conclusions: Safety indices from Doppler evaluation of the fetal heart and tricuspid flow vary during the learning curve for fetal heart assessment. Also, the occurrence of constant values suggests the potential for their supplementary active reduction. For a better adaptation to a new ultrasound technology, the sonographer should scan the fetal heart longer in the first trimester and follow displayed safety indices along the first 80 cases.

show abstract

Ultrasound for fetal assessment in early pregnancy

Whitworth

Bricker

Mullan³

2015

Cochrane Database of Systematic Reviews

216

114

View full text Add to dashboard Cite

Background-Diagnostic ultrasound is a sophisticated electronic technology, which utilises pulses of high frequency sound to produce an image. Diagnostic ultrasound examination may be employed in a variety of specific circumstances during pregnancy such as after clinical complications, or where there are concerns about fetal growth. Because adverse outcomes may also occur in pregnancies without clear risk factors, assumptions have been made that routine ultrasound in all pregnancies will prove beneficial by enabling earlier detection and improved management of pregnancy complications. Routine screening may be planned for early pregnancy, late gestation, or both. The focus of this review is routine early pregnancy ultrasound.

show abstract

Use of a high‐frequency linear transducer and MTI filtered color flow mapping in the assessment of fetal heart anatomy at the routine 11 to 13 + 6‐week scan: a randomized trial

Abstract: Objective To prospectively assess the contribution of a high-frequency linear transducer and of moving target indicator (MTI) filtered color flow mapping in the visualization

Cited by 14 publications

References 23 publications

The Use of a High Frequency Linear Transducer in the Assessment of Fetal Anatomy at the Routine 11 to 13 + 6-Week Scan among Chinese Population

The Use of a High Frequency Linear Transducer in the Assessment of Fetal Anatomy at the Routine 11 to 13 + 6-Week Scan among Chinese Population

Variation of safety indices during in the learning curve for color Doppler assessment of the fetal heart at 11+0 to 13+6 weeks’ gestation

Ultrasound for fetal assessment in early pregnancy

Contact Info

Product

Resources

About