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Related Concept Videos

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...
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Assessment of the Abdomen III: Palpation01:23

Assessment of the Abdomen III: Palpation

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Palpation is a crucial tactile examination method for assessing abdominal organs and detecting conditions like tenderness, distention, masses, or fluid. It involves both light and deep palpation techniques, each serving specific diagnostic purposes. Light palpation helps identify tenderness and other surface-level indicators, while deep palpation locates and assess abdominal masses and organ boundaries. A skilled professional can gather valuable insights through palpation, including evaluating...
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Ultrasonography01:17

Ultrasonography

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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

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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...
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Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

Ultrasound II: Endoscopic Ultrasound and FibroScan

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Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
Endoscopic Ultrasound (EUS):
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Assessment of the Abdomen II: Percussion01:18

Assessment of the Abdomen II: Percussion

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Percussion is a fundamental technique used to assess the liver, spleen, and abdominal organs by tapping the abdomen and interpreting the resulting sounds. This method helps identify fluid, distention, and masses through variations in sound, such as the high-pitched tympany of air-filled areas and the dullness of solid masses. Understanding how to percuss these organs provides valuable information for healthcare professionals in diagnosing conditions early.
Percussion
Percussion is an essential...
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A Novel Use of Three-dimensional High-frequency Ultrasonography for Early Pregnancy Characterization in the Mouse
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Routine Third Trimester Sonogram: Friend or Foe.

Katie Stephens1, Alexandros Moraitis1, Gordon C S Smith1

  • 1Department of Obstetrics and Gynaecology, University of Cambridge, Box 223, The Rosie Hospital, Robinson Way, Cambridge CB2 0SW, United Kingdom.

Obstetrics and Gynecology Clinics of North America
|May 11, 2021
PubMed
Summary
This summary is machine-generated.

Routine third trimester ultrasound scans can identify pregnancy risks but may cause harm and anxiety due to false positives. Better screening methods are needed for overall benefit, except for near-term presentation screening.

Keywords:
DopplerFetal growth restrictionFetal presentationLarge for gestational ageScreeningSmall for gestational ageStillbirthUltrasound

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Area of Science:

  • Maternal-fetal medicine
  • Diagnostic imaging in obstetrics

Background:

  • Third trimester ultrasound screening can identify adverse pregnancy outcomes.
  • False positive results may lead to unnecessary interventions, increased anxiety, and healthcare costs.
  • Current evidence is insufficient to balance the risks and benefits of universal screening.

Purpose of the Study:

  • To evaluate the diagnostic effectiveness of universal third trimester ultrasound screening.
  • To determine if current screening methods offer a net benefit in managing pregnancy outcomes.
  • To assess the potential for improved diagnostic accuracy in obstetric screening.

Main Methods:

  • Review of existing evidence on the diagnostic accuracy of third trimester ultrasound.
  • Analysis of risk-benefit ratios associated with universal versus selective screening.
  • Evaluation of clinical and economic data for specific screening applications.

Main Results:

  • The diagnostic effectiveness of universal ultrasound screening is currently inadequate for net benefit.
  • False positives pose a significant risk, potentially outweighing benefits in many cases.
  • Screening for presentation near term demonstrates a clear clinical and economic justification.

Conclusions:

  • Improved diagnostic methods are necessary to enhance the net benefit of third trimester ultrasound screening.
  • Universal screening is not currently supported by adequate evidence, except for specific indications.
  • Targeted screening, such as for fetal presentation near term, is a justifiable application of ultrasound technology.