Biomedical subjects

J Blanes

Publications and source records attributed to J Blanes.

8 recordsLinked to original sources

PubMed1999

Polycystic ovarian syndrome: assessment with color Doppler angiography and three-dimensional ultrasonography.

We conducted a three-dimensional ultrasonographic evaluation of the size and structure of the ovaries of women who had clinical and biochemical findings suggestive of polycystic ovary syndrome. We carried out a comparative color Doppler frequency and color Doppler amplitude study of the vascular patterns of these ovaries. This study involved 65 women of reproductive age with polycystic ovary syndrome and 25 eumenorrheic women who were not taking hormonal contraceptives and who had a body mass index below 25 kg/m2. Compared to controls, women with polycystic ovary syndrome had larger ovaries and thicker stroma, increased impedance in the uterine arteries, increased stromal vascularity with decreased impedance that persisted throughout the menstrual cycle, and a lack of luteal conversion.

Adult↗

PubMed1998

First-trimester neck abnormalities: three-dimensional evaluation.

In order to study the first trimester ultrasonographic differences between nuchal translucency and hygroma colli, we rescanned 25 fetuses (13 with nuchal translucency and 12 with hygroma colli) using transvaginal and three-dimensional ultrasonography, after obtaining a fetal karyotype report. Our objective was to test the premise that the different physiopathologic mechanisms of both processes would be reflected in detectable sonographic differences. Our retrospective analysis showed that the most striking ultrasonographic difference was the presence of bullae as well as greater irregularity, extent, and amplitude of the membrane in cases of hygroma colli. Fetuses with simple nuchal translucency had a more homogeneous linear membrane. Although detailed analysis was impossible in 30% of cases, we found three-dimensional ultrasonography to be a useful technique for establishing the differences between these two entities.

Female↗

PubMed1998

Early diagnosis of conjoined twins using two-dimensional color Doppler and three-dimensional ultrasound.

Transvaginal three-dimensional (3-D) and color Doppler ultrasound were used to establish a first-trimester definitive diagnosis and classification of thoracoomphalopagus conjoined twins following two-dimensional (2-D) transabdominal and transvaginal scans that indicated twin gestation of uncertain classification. Color Doppler in combination with 3-D ultrasound can be a useful complement to 2-D ultrasound to confirm early diagnosis and determine the extent of organ sharing and definitive classification of conjoined twins.

Abortion, Induced↗

PubMed1997

Three-dimensional hysterosonography for the study of endometrial tumors: comparison with conventional transvaginal sonography, hysterosalpingography, and hysteroscopy.

We studied endometrial thickness and homogeneity in 36 patients with postmenopausal bleeding using three-dimensional ultrasound following distention of the uterine cavity with a sterile saline solution (3D-SHSG). Results with 3D-SHSG were compared with findings using transvaginal sonography, transvaginal sonohysterography, transvaginal color Doppler, and hysteroscopy. Sixteen patients (including three on tamoxifen) were undergoing hormone therapy at the time when they were studied. Visualization of the uterine cavity and of endometrial thickness was better with 3D-SHSG than with any of the other ultrasound techniques. The results with 3D-SHSG corresponded to the findings observed with hysteroscopy. Three-dimensional SHSG seems to improve ultrasound determination of myometrial and cervical invasion in cases of endometrial adenocarcinoma.

Endometrial Hyperplasia↗

PubMed1996

Control of intrauterine device insertion with three-dimensional ultrasound: is it the future?

A comparative study was designed to determine whether three-dimensional transvaginal sonography (3D-TVS) offered advantages over two-dimensional transvaginal sonography (2D-TVS) for the identification and location of IUDs in 66 asymptomatic women. Hysteroscopy was performed in cases in which there was a discrepancy between the information obtained by both methods (n = 14). In eight cases (12.2%) the IUD was misidentified with 2D-TVS. In six cases (9.1%) it was not possible to identify the device model with 2D-TVS. In two cases (3.0%) 2D-TVS failed to identify the position of the device. In contrast, all IUDs were identified and located accurately with 3D-TVS.

Adult↗

PubMed1996

Congenital Müllerian anomalies: diagnostic accuracy of three-dimensional ultrasound.

OBJECTIVE: To determine whether it is possible to identify and diagnose accurately Müllerian anomalies with three-dimensional (3-D) ultrasound (US). DESIGN: Controlled blinded clinical study. SETTING: Normal human volunteers undergoing infertility evaluation in a university hospital. PATIENTS: Forty-two patients who underwent laparoscopy and hysterosalpingography as part of their work up for infertility and were found to have either a normal uterus (30 patients) or a Müllerian abnormality (12 patients) consented to be evaluated with 3-D US by sonographers who were unaware of their infertility history or of their laparoscopy and hysterosalpingography diagnoses. INTERVENTIONS: Transvaginal 3-D US evaluation over a 10- to 15-minute duration. MAIN OUTCOME MEASURES: Three-dimensional imaging was successful in all cases. RESULTS: Sonographers identified a Müllerian anomaly in all cases and came up with the correct classification in 11 of 12 cases. All patients with a normal uterus were identified correctly. CONCLUSIONS: In all patients with Müllerian anomalies, 3-D US examination of the endometrial cavity correlated with hysterosalpingography. In 91.6% of patients, 3-D US correlated with the external uterine configuration observed by laparoscopy. This technique may be used reliably in an office setting to diagnose and classify Müllerian anomalies.

Adult↗

PubMed1995

Use of three-dimensional ultrasonography for the study of normal and pathologic morphology of the human embryo and fetus: preliminary report.

Our objective was to determine whether three-dimensional ultrasonography offers advantages over two-dimensional sonography for the evaluation of normal and pathologic morphology of human embryos and fetuses at various stages of pregnancy. Our studies suggest that small fetal and embryonic malformations are better defined with 3D sonography. Our experience indicates that 3D sonography allows more detailed visualization of fetal internal structures. We believe that with technical improvements 3D sonography will permit a more complete evaluation of fetuses earlier in gestation than is possible with current 2D sonographic instruments.

Adolescent↗

PubMed1987

[Sonographic diagnosis of holoacardius].

In the 28th week of gestation a normal foetus and a holoacardius were diagnosed via sonography in a biamnotic monochoriatic twin pregnancy. The growth of the foetuses was observed under continuous sonographic control up to the 40th week of pregnancy. The patient delivered a healthy twin by Caesarean section and the acardius was subjected to a postmortem. Macroscopic and histological findings in the foetus, the placenta and the umbilical cords are demonstrated. The pathogenesis of the holoacardius is discussed as being due to chromosomal aberrations and foeto-foetal transfusion syndrome.

Abnormalities, Multiple↗