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Related Concept Videos

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...
Imaging Studies for Cardiovascular System I:Echocardiography01:17

Imaging Studies for Cardiovascular System I:Echocardiography

Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion, evaluates...
Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

Ultrasound II: Endoscopic Ultrasound and FibroScan

Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
Endoscopic Ultrasound (EUS):
Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

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...
Ultrasound I: Abdominal Ultrasonography01:20

Ultrasound I: Abdominal Ultrasonography

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...
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:

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Related Experiment Video

Updated: May 27, 2026

Screening of Axonal Degeneration in Carpal Tunnel Syndrome Using Ultrasonography and Nerve Conduction Studies
06:40

Screening of Axonal Degeneration in Carpal Tunnel Syndrome Using Ultrasonography and Nerve Conduction Studies

Published on: January 11, 2019

Screening for carpal tunnel syndrome using sonography.

Shawn C Roll1, Kevin D Evans, Xiaobai Li

  • 1College of Medicine, The Ohio State University, Columbus, OH, USA.

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine
|November 30, 2011
PubMed
Summary

New sonography methods accurately diagnose carpal tunnel syndrome by measuring median nerve swelling. These techniques show high correlation with electrodiagnostic testing, improving diagnostic accuracy.

Related Experiment Videos

Last Updated: May 27, 2026

Screening of Axonal Degeneration in Carpal Tunnel Syndrome Using Ultrasonography and Nerve Conduction Studies
06:40

Screening of Axonal Degeneration in Carpal Tunnel Syndrome Using Ultrasonography and Nerve Conduction Studies

Published on: January 11, 2019

Area of Science:

  • Musculoskeletal sonography
  • Diagnostic imaging techniques

Background:

  • Carpal tunnel syndrome diagnosis relies on inconsistent sonographic measurements.
  • Novel internal comparison methods are needed to assess median nerve swelling.

Purpose of the Study:

  • To compare novel sonographic measurements of median nerve swelling with established electrodiagnostic testing for carpal tunnel syndrome.
  • To investigate the diagnostic accuracy of flattening ratio, retinacular bowing, and cross-sectional area measurements.

Main Methods:

  • Sonographic measurements (flattening ratio, retinacular bowing, cross-sectional area) were taken at multiple forearm and wrist locations in 166 participants.
  • Electrodiagnostic testing served as the gold standard for symptomatic patients.

Main Results:

  • Flattening ratio showed no correlation with electrodiagnostic testing.
  • Sonographic measurements of cross-sectional area at the pisiform, retinacular bowing, and cross-sectional area changes demonstrated moderate to strong correlations with electrodiagnostic results.
  • Receiver operating characteristic curves showed high diagnostic accuracy (AUC 0.759-0.899) and sensitivity (80.4%-82.4%).

Conclusions:

  • Sonographic measurement of median nerve swelling, using ratios or absolute changes, offers comparable diagnostic accuracy to individual cross-sectional area measurements.
  • These refined sonographic techniques may enhance diagnostic precision in varied clinical settings.
  • Further research should focus on optimizing protocols for identifying maximal cross-sectional area and advanced statistical analysis for improved diagnostics.