Related Experiment Video

Updated: Jul 27, 2026

Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
14:19

Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction

Published on: June 29, 2013

[Ultrasound study of blood flow velocity in the umbilical artery]

A Pál, A Kurjak

    Zentralblatt Fur Gynakologie
    |January 1, 1986
    PubMed

    The blood flow velocity waveforms fo the umbilical artery were examined in 101 healthy pregnant women in 146 occasions. A Kranzbühler 8130 Duplex Doppler equipment was used in all of the examinations. Their results were estimated by the A/B ratios (A = systolic peak, B = end diastole) and the Resistance Indexes (Formula: see text). It was found that the A/B ratio decreased from 3.0 to 2.0 and the Resistance Index from 0.6 to 0.5 from the 28th week of pregnancy till term. The changes showed that the resistance of the placental bed decreased continuously in healthy pregnant woman during the third trimester.

    More Related Videos

    Fetal Mouse Cardiovascular Imaging Using a High-frequency Ultrasound (30/45MHZ) System07:34

    Fetal Mouse Cardiovascular Imaging Using a High-frequency Ultrasound (30/45MHZ) System

    Published on: May 5, 2018

    High Frequency Ultrasound for the Analysis of Fetal and Placental Development In Vivo06:43

    High Frequency Ultrasound for the Analysis of Fetal and Placental Development In Vivo

    Published on: November 8, 2018

    Related Concept Videos

    Assessing Blood pressure using a doppler ultrasound01:19

    Assessing Blood pressure using a doppler ultrasound

    To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
    Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
    Preparation of Equipment:
    Ultrasonography01:17

    Ultrasonography

    Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
    During an ultrasonography procedure, a handheld device called a...
    Fetal Circulation01:14

    Fetal Circulation

    Fetal circulation is a unique system that facilitates the exchange of gases, nutrients, and waste products between the developing fetus and the mother. This intricate process takes place through a special organ called the placenta.
    Two umbilical arteries transport blood from the fetus to the placenta. At the placenta, the blood absorbs oxygen and nutrients while simultaneously eliminating waste products. This oxygen-enriched and nutrient-rich blood then returns to the fetus through one...
    Imaging Studies for Cardiovascular System II:Types of Echocardiography01:20

    Imaging Studies for Cardiovascular System II:Types of Echocardiography

    Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
    Types of Echocardiography
    Transthoracic Echocardiography (TTE)
    TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...
    Urodynamic Studies: Uroflowmetry01:19

    Urodynamic Studies: Uroflowmetry

    Uroflowmetry is a non-invasive urodynamic test designed to measure various aspects of urination, including volume, flow rate, and the time to void. This test is crucial for diagnosing and assessing conditions such as bladder outlet obstruction, bladder dysfunction, incomplete bladder emptying, incontinence, and urinary tract blockages caused by benign prostatic hyperplasia (BPH) and urethral strictures.Pre-Test Instructions:Before a uroflowmetry test, patients are typically advised to drink...