Comparison Between the Roles of Trans-abdominal 3D Ultrasound Versus Transvaginal 2D Ultrasound in Evaluation of Placental Invasion in Cases of Placenta Previa with Previous Uterine Scar

Abstract The incidence of placenta accreta/percreta should rise steadily over the next century as the frequency of cesarean sections and advanced maternal age, both independent risk factors, increases. Patients who are at risk should be identified. The diagnosis of placenta previa accreta/percreta is possible by using gray-scale sonography, conventional color Doppler imaging and MRI through studying the relation of placenta to the uterine wall and nearby pelvic structures. The potentially new modality of 3D and 3D color power Doppler ultrasound has it's value as a tool to achieve significantly increased diagnostic accuracy in the prediction of massive hemorrhage by assessing the extent, location and quantification of abnormal uteroplacental neovascularization. Hence, 3D ultrasound has the potential for providing additional information over conventional 2D ultrasound studies in the diagnosis of placenta previa percreta. The diagnosis and anticipation of the problem achieve the best results for the obstetrician and the patient.

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A Phantom Study Comparing Ultrasound-Guided Liver Tumor Puncture Using New Real-Time 3D Ultrasound and Conventional 2D Ultrasound

American Journal of Roentgenology ◽

10.2214/ajr.10.5552 ◽

2011 ◽

Vol 196 (6) ◽

pp. W753-W757 ◽

Cited By ~ 8

Author(s):

Katsutoshi Sugimoto ◽

Fuminori Moriyasu ◽

Junji Shiraishi ◽

Masahiko Yamada ◽

Yasuharu Imai

Keyword(s):

Real Time ◽

Liver Tumor ◽

3D Ultrasound ◽

Phantom Study ◽

Ultrasound Guided ◽

2D Ultrasound

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The possibility of high-precision ultrasound diagnosis of placenta ingrowth into the uterine scar after cesarean section

10.21516/2413-1458-2020-19-4-336-342 ◽

2020 ◽

Author(s):

V.N. Demidov, A.I. Gus, T.A. Yarygina

Keyword(s):

Statistical Analysis ◽

Cesarean Section ◽

Pregnant Women ◽

High Precision ◽

Ultrasound Examination ◽

Placenta Previa ◽

Ultrasound Diagnosis ◽

Lower Segment ◽

Uterine Scar

Our statistical analysis, based on ultrasound examination of 7069 pregnant women, showed that both in the absence and in the presence of a scar on the uterus in the region of its lower segment, the placenta in the 3rd trimester of pregnancy was located extremely rarely, only in 0.1%. It was either primarily located in other parts of the uterus, or migrated from the lower segment of the uterus towards the bottom. In the case of the location of the placenta in this area, its ingrowth was not observed only in 2.3% of women. The main ultrasound signs of ingrowth of the placenta into the scar was the absence of its migration, as well as the presence of a combination of placenta previa with its localization in the scar zone. From the data obtained, it follows that the sensitivity of ultrasound diagnosis of placental accreta was 97.7%, and the specificity was 99.9%. According to our data, ingrown placenta in most cases can be delivered as early as 14–19 weeks, and the time spent on detecting this pathology usually does not exceed one minute.

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A left ventricular phantom for 3D echocardiographic twist measurements

Biomedical Engineering / Biomedizinische Technik ◽

10.1515/bmt-2019-0096 ◽

2020 ◽

Vol 65 (2) ◽

pp. 209-218

Author(s):

Johannes Just Hjertaas ◽

Knut Matre

Keyword(s):

Stroke Volume ◽

Spatial Resolution ◽

Reference Method ◽

3D Ultrasound ◽

Left Ventricular ◽

Apical Rotation ◽

Mock Circulation ◽

Custom Made ◽

Wide Range ◽

2D Ultrasound

AbstractTraditional two-dimensional (2D) ultrasound speckle tracking echocardiography (STE) studies have shown a wide range of twist values, also for normal hearts, which is due to the limitations of short-axis 2D ultrasound. The same limitations do not apply to three-dimensional (3D) ultrasound, and several studies have shown 3D ultrasound to be superior to 2D ultrasound, which is unreliable for measuring twist. The aim of this study was to develop a left ventricular twisting phantom and to evaluate the accuracy of 3D STE twist measurements using different acquisition methods and volume rates (VR). This phantom was not intended to simulate a heart, but to function as a medium for ultrasound deformation measurement. The phantom was made of polyvinyl alcohol (PVA) and casted using 3D printed molds. Twist was obtained by making the phantom consist of two PVA layers with different elastic properties in a spiral pattern. This gave increased apical rotation with increased stroke volume in a mock circulation. To test the accuracy of 3D STE twist, both single-beat, as well as two, four and six multi-beat acquisitions, were recorded and compared against twist from implanted sonomicrometry crystals. A custom-made software was developed to calculate twist from sonomicrometry. The phantom gave sonomicrometer twist values from 2.0° to 13.8° depending on the stroke volume. STE software tracked the phantom wall well at several combinations of temporal and spatial resolution. Agreement between the two twist methods was best for multi-beat acquisitions in the range of 14.4–30.4 volumes per second (VPS), while poorer for single-beat and higher multi-beat VRs. Smallest offset was obtained at six-beat multi-beat at 17.1 VPS and 30.4 VPS. The phantom proved to be a useful tool for simulating cardiac twist and gave different twist at different stroke volumes. Best agreement with the sonomicrometer reference method was obtained at good spatial resolution (high beam density) and a relatively low VR. 3D STE twist values showed better agreement with sonomicrometry for most multi-beat recordings compared with single-beat recordings.

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Abdominal Tumor in a 14-Year-Old Adolescent: Imperforate Hymen, Resulting in Hematocolpos—A Case Report and Review of the Literature

Case Reports in Obstetrics and Gynecology ◽

10.1155/2015/429740 ◽

2015 ◽

Vol 2015 ◽

pp. 1-3 ◽

Cited By ~ 1

Author(s):

George Marios Makris ◽

Doris Macchiella ◽

Dennis Vaidakis ◽

Charalampos Chrelias ◽

Marco Johannes Battista ◽

...

Keyword(s):

Differential Diagnosis ◽

3D Ultrasound ◽

Medical Advice ◽

Female Adolescents ◽

Review Of The Literature ◽

Abdominal Tumor ◽

Imperforate Hymen ◽

Abdominal Masses ◽

2D Ultrasound

Background. Abdominal masses in female adolescents are uncommon. A rare cause of this condition is hematocolpos due to imperforate hymen.Case. We present a case of an unusually massive asymptomatic abdominal bulk in a 14-year-old female patient, who sought for medical advice after unusual abdominal pain lasting for few weeks. The patient was otherwise asymptomatic, apart from an unusual dramatic expansion of her abdominal wall during the last month. We describe the surgical management and the follow-up of the patient.Summary and Conclusion. Clinicians should keep in mind that an imperforate hymen can cause abdominal growth due to hematocolpos and include it in the differential diagnosis of such a clinical entity in female adolescents. 2D ultrasound is usually efficient for the confirmation of the diagnosis of hematocolpos, but 3D ultrasound is more accurate. Wide excision should be undertaken, as an initial approach, to avoid recurrence.

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OC20.08: 3D ultrasound does not improve diagnosis of retained placental tissue compared to 2D ultrasound

Ultrasound in Obstetrics and Gynecology ◽

10.1002/uog.12700 ◽

2013 ◽

Vol 42 (s1) ◽

pp. 42-42

Author(s):

J. Belachew ◽

K. Eurenius ◽

O. Axelsson ◽

A. Mulic-Lutvica

Keyword(s):

Placental Tissue ◽

3D Ultrasound ◽

2D Ultrasound ◽

Retained Placental Tissue

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Virtual embryoscope for detection of structural abnormalities in first trimester pregnancy

International Journal of Reproduction Contraception Obstetrics and Gynecology ◽

10.18203/2320-1770.ijrcog20171950 ◽

2017 ◽

Vol 6 (5) ◽

pp. 1924

Author(s):

Sumesh Choudhary ◽

Vineet Mishra ◽

Rohina Aggarwal

Keyword(s):

First Trimester ◽

3D Ultrasound ◽

P Value ◽

Detection Rates ◽

Significant Difference ◽

Structural Abnormalities ◽

Innovative Tool ◽

2D Ultrasound ◽

Additional Value ◽

A Prospective Study

Background: To determine whether there is an additional value of virtual embryoscopy with 3Dimensional (3D) ultrasound above (2D) ultrasound regarding detection rates of structural abnormalities in first trimester pregnancy.Methods: This was a prospective study consisting of 52 pregnant women with gestational age ranging from 6 to 12 weeks. 2D and 3D ultrasound scan was performed using GE voluson E8 transvaginal probe. All scans were evaluated by ten gynecologists trained in USG. The observations were noted and compared for anatomical details and detection of structural defects.Results: It was found that images were seen well with 3D (virtual embryoscope). i.e. maximum count 19 in the table and there is statistically significant difference between 3D and 2D images with a p-value <0.01 at 95% confidence interval (CI).Conclusions: Virtual embryoscope is an innovative tool for evaluation of developing embryo and early foetal morphology. The advantages are the ability to reconstruct 3D images with the stored scanned volume and examine without having to rescan the patient.

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Clinical outcomes of placenta previa with and without coverage of a uterine scar: A retrospective cohort study in a tertiary hospital

10.21203/rs.2.13946/v1 ◽

2019 ◽

Author(s):

Jiaming Rao ◽

Dazhi Fan ◽

Zixing Zhou ◽

Gengdong Chen ◽

Huiting Ma ◽

...

Keyword(s):

Cohort Study ◽

Postpartum Hemorrhage ◽

Retrospective Cohort ◽

Placenta Previa ◽

Fetal Distress ◽

Neonatal Outcomes ◽

Intraoperative Blood Loss ◽

Maternal And Neonatal Outcomes ◽

Uterine Scar ◽

Singleton Pregnancies

Abstract Background To compare the maternal and neonatal outcomes of placenta previa (PP) with and without coverage of a uterine scar in China. Methods A retrospective cohort study comparing all singleton pregnancies with PP was conducted at a tertiary, university-affiliated medical center between January 2012 and April 2017. Maternal and neonatal outcomes of PP with and without coverage of a uterine scar were compared. Results There were 58,062 deliveries during the study period, of which 738 (1.27%) were complicated PP in singleton pregnancies and were further classified into two groups: the PP with coverage of a uterine scar group (PPCS, n=166) and the PP without coverage of a uterine scar group (Non-PPCS, n=572). Overall, the PPCS group had poorer maternal and neonatal outcomes for premature birth (< 37 weeks,68.1% vs 54.8%; P=0.010), cesarean section(100% vs 97.6%; P=0.042), Intraoperative blood loss > 1000 ml (78.3% vs 16.0%; P<0.001) or > 3000ml (29.5% vs 3.0%; P<0.001), postpartum hemorrhage(48.8% vs 15.7%; P<0.001), transfusion (35.2% vs 16.1%; P<0.001), hemorrhage shock(8.4% vs 1.9%; P<0.001), hysterectomy (3.0% vs 0.5%; P=0.006) and fetal distress (36.1% vs 12.0%; P<0.001) than the Non-PPCS group. In pregnancies complicated without abnormal invasive placenta (AIP, n=587), the PPCS group had poorer maternal and neonatal outcomes for Intraoperative blood loss > 1000 ml (69.0% vs 12.5%; P<0.001) or > 3000ml (9.2% vs 1.0%; P<0.001), bleeding within 2-24 hours after delivery (114.7±283.9 vs 47.7±45.1 ml, P<0.001), postpartum hemorrhage (70.1% vs 15.2%, P<0.001), transfusion (28.7% vs 13.6%, P<0.001) and fetal stress (35.6% vs 11.4%, P<0.001) than the Non-PPCS group. Conclusion The PPCS group had poorer maternal and neonatal outcomes than the Non-PPCS group. Women with PPCS were more likely to have intraoperative and postpartum hemorrhage, transfusion and fetal distress, even without AIP.

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Maternal and neonatal outcomes of placenta previa with and without coverage of a uterine scar: A retrospective cohort study in a tertiary hospital

10.21203/rs.3.rs-31117/v1 ◽

2020 ◽

Author(s):

Jiaming Rao ◽

Dazhi Fan ◽

Zixing Zhou ◽

Gengdong Chen ◽

Pengsheng Li ◽

...

Keyword(s):

Cohort Study ◽

Blood Loss ◽

Retrospective Cohort ◽

Placenta Previa ◽

Fetal Distress ◽

Neonatal Outcomes ◽

Intraoperative Blood Loss ◽

Maternal And Neonatal Outcomes ◽

Uterine Scar ◽

Singleton Pregnancies

Abstract Background To compare the maternal and neonatal outcomes of placenta previa (PP) with and without coverage of a uterine scar in Foshan, China. Methods A retrospective cohort study comparing all singleton pregnancies with PP was conducted at a tertiary, university-affiliated medical center from 1 January 2012 to 31 April 2017 in Foshan, China. Demographic, clinical and laboratory data were extracted from electronic medical records. Maternal and neonatal outcomes of PP with and without coverage of a uterine scar were compared by statistical method. Results There were 58,062 deliveries during the study period, of which 738 (1.27%) were complicated PP in singleton pregnancies and were further classified into two groups: the PP with coverage of a uterine scar group (PPCS, n = 166) and the PP without coverage of a uterine scar group (Non-PPCS, n = 572). Overall, premature birth (< 37 weeks,68.1% vs 54.8%; P = 0.010), cesarean section(100% vs 97.6%; P = 0.042), Intraoperative blood loss > 1000 ml (78.3% vs 16.0%; P < 0.001) or > 3000 ml (29.5% vs 3.0%; P < 0.001), postpartum hemorrhage(48.8% vs 15.7%; P < 0.001), transfusion (35.2% vs 16.1%; P < 0.001), hemorrhage shock(8.4% vs 1.9%; P < 0.001), hysterectomy (3.0% vs 0.5%; P = 0.006) and fetal distress (36.1% vs 12.0%; P < 0.001) had a significant difference between PPCS group and Non-PPCS group. After grouping by whether complicated with AIP, we found that PPCS was significant associated with more intraoperative blood loss༞1000 ml, intraoperative blood loss༞3000 ml, bleeding within 2–24 hours after delivery, fetal distress and higher hospitalization expenses than the Non-PPCS group. After grouping by whether complicated with AIP and different placenta positions(Anterior, Posterior and Ante-posterior or laterally positioned), we found that PPCS was significant associated with more intraoperative blood loss༞1000 ml and higher hospitalization expenses than the Non-PPCS in AIP women and more intraoperative blood loss༞1000 ml, postpartum hemorrhage and higher hospitalization expenses in Non-AIP women. Conclusion The PPCS group had poorer maternal and neonatal outcomes than the Non-PPCS group after grouping by whether pregnancies complicated with AIP or with different placental positions.

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