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Related Concept Videos

Ultrasonography01:17

Ultrasonography

6.5K
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...
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Ultrasound I: Abdominal Ultrasonography01:20

Ultrasound I: Abdominal Ultrasonography

3.5K
Introduction:
Abdominal ultrasonography, commonly known as abdominal ultrasound, is a vital, non-invasive medical imaging technique widely used in healthcare.
Procedure:
This diagnostic tool allows the clinician to visually inspect internal structures within the abdomen, including vital organs such as the liver, gallbladder, pancreas, kidneys, and spleen.
The abdominal ultrasound process begins with applying a special gel to the patient's skin over the abdomen. This gel enhances the...
3.5K
Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

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IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
925
Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

3.0K
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:
3.0K
Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

Ultrasound II: Endoscopic Ultrasound and FibroScan

1.3K
Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
Endoscopic Ultrasound (EUS):
1.3K
Imaging Studies for Cardiovascular System II:Types of Echocardiography01:20

Imaging Studies for Cardiovascular System II:Types of Echocardiography

972
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...
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Related Experiment Video

Updated: May 6, 2026

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
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Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas

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Ultrasound in twins: dichorionic and monochorionic.

Lynn L Simpson1

  • 1Department of Obstetrics and Gynecology, Columbia University Medical Center, 622 W 168th St, PH-16, NY 10032.

Seminars in Perinatology
|November 2, 2013
PubMed
Summary

This review assesses ultrasound

Area of Science:

  • Obstetrics and Gynecology
  • Fetal Medicine
  • Diagnostic Imaging

Background:

  • Obstetric ultrasound is crucial for singleton pregnancies.
  • Twin gestations present unique diagnostic challenges and require specialized imaging protocols.
  • Early and accurate assessment is vital for managing twin pregnancy complications.

Purpose of the Study:

  • To evaluate the evidence supporting ultrasound's role in twin pregnancies.
  • To highlight specific indications and conditions unique to twin gestations.
  • To emphasize ultrasound's importance in detecting and managing twin pregnancy complications.

Main Methods:

  • Review of existing literature and guidelines on ultrasound in twin pregnancies.
  • Analysis of indications for ultrasound in both singleton and twin gestations.
Keywords:
DichorionicDiscordant growthMonochorionicSonographic surveillanceTwin-twin-transfusion syndromeTwins

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Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators
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Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators
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  • Identification of specific ultrasound findings relevant to monochorionic and dichorionic twins.

    • Main Results:

    • Ultrasound is essential for pregnancy dating, chorionicity determination, and anatomical surveys in twins.
    • Specific conditions in monochorionic twins, such as twin-twin transfusion syndrome and TRAP syndrome, require vigilant ultrasound surveillance.
    • Ultrasound aids in monitoring fetal growth, cervical length, and amniotic fluid abnormalities, crucial for timely intervention.

    Conclusions:

    • Ultrasound is indispensable for the comprehensive management of twin pregnancies.
    • Specialized ultrasound protocols are necessary to address the complexities of twin gestations.
    • Effective utilization of ultrasound improves detection and management of adverse outcomes in twins.