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Related Concept Videos

Spinal Nerves: Plexus I01:22

Spinal Nerves: Plexus I

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Nerve plexuses are networks of interlacing nerves that serve as communication hubs to distribute and organize nerve action across various body regions. The nerve plexuses are organized into the cervical plexus located in the neck region, brachial plexus in the shoulder area, lumbar plexus found in the lower back, sacral plexus situated in the pelvis, and coccygeal plexus located in the coccygeal region.
The Cervical Plexus
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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.
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Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
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This procedural guide systematically measures blood pressure using an oscillometric digital sphygmomanometer, emphasizing accuracy, patient safety, and comfort.
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Updated: Jun 28, 2025

Nerve Ultrasound Protocol to Detect Dysimmune Neuropathies
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Ultrasound accuracy for brachial plexus pathology.

S W Y Yip1, J F Griffith1, C S L Tong1

  • 1Department of Imaging and Interventional Radiology, The Chinese University of Hong Kong, Prince of Wales Hospital, 30-32 Ngan Shing Street, Shatin, Hong Kong.

Clinical Radiology
|April 21, 2024
PubMed
Summary
This summary is machine-generated.

Ultrasound accurately detects brachial plexus pathology with 98% efficacy, matching MRI. This makes ultrasound a valuable initial imaging tool for suspected brachial plexus conditions.

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Area of Science:

  • Radiology
  • Neurology
  • Musculoskeletal Imaging

Background:

  • Brachial plexus pathology can be challenging to diagnose.
  • Accurate imaging is crucial for effective treatment planning.

Purpose of the Study:

  • To evaluate the accuracy of ultrasound in diagnosing brachial plexus pathology.
  • To compare ultrasound's advantages and limitations against MRI for brachial plexus imaging.

Main Methods:

  • 143 patients with suspected brachial plexus pathology underwent both ultrasound and MRI.
  • Final diagnosis was confirmed by ultrasound, MRI, clinical follow-up, and surgical findings.
  • Ultrasound accuracy was assessed against the final diagnosis.

Main Results:

  • Ultrasound demonstrated 98% diagnostic accuracy for brachial plexus pathology.
  • Sensitivity was 94%, specificity 100%, PPV 100%, and NPV 97%.
  • Common pathologies included post-radiation fibrosis, nerve sheath tumors, and traumatic injuries.

Conclusions:

  • Ultrasound is a highly accurate and specific imaging modality for brachial plexus pathology.
  • It shows diagnostic efficacy comparable to MRI.
  • Ultrasound is recommended as a first-line investigation for suspected brachial plexus conditions.