Comparing Shape Categorization to Circularity Measurement in the Evaluation of Median Nerve Compression Using Sonography

Details

• Personal Author:
  Gan K ; Lee A ; Roll SC ; Yao B
• Description:
  Purpose: This study aimed to develop a subjective categorization of nerve shape and to examine the relationship of shape categorizations to measurement of nerve circularity. Methods: Wrists were evaluated with sonography in healthy participants. Images of the median nerve were obtained in the transverse plane at the level of pisiform with the fingers resting, gripping, and pinching. Nerves were categorized as ovoid, angular, or irregular, and the cross-sectional area and perimeter were measured to calculate nerve circularity. Results: Across 167 participants, the median nerve shifted from being primarily ovoid at rest to angular shaped when the fingers were in a full fist or pinching. Approximately three-quarters of subjects exhibited a shape change during dynamic movement. Irregular nerves had the lowest circularity values; however, the majority of nerves had similar circularity measures despite having different shapes. Conclusions: Subjective categorization of shape has the potential to be a valid technique for evaluation of the median nerve using sonography, and this evaluation may provide additional information regarding nerve compression that is not fully captured by a circularity measure. Further investigation is needed to determine how these two techniques may be best used individually or together to advance clinical diagnosis, prevention, and rehabilitative interventions. [Description provided by NIOSH]
• Subjects:
  Diagnosis Health Care Facilities Workforce And Services Musculoskeletal Diseases Musculoskeletal System Nervous System Occupational Health Safety
• Keywords:
  Author Keywords: Sonography Carpal Tunnel Syndrome Circularity CTS Diagnostic Techniques Humans Imaging Techniques Measurement Equipment Median Nerve Medical Equipment Motion Studies MSD Musculoskeletal Disorders Musculoskeletal System Nerve Function Nerves Ultrasonic Testing Ultrasound

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• ISSN:
  1552-5430
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  California ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  224-232
• Volume:
  36
• Issue:
  3
• NIOSHTIC Number:
  nn:20058711
• Citation:
  J Diagn Med Sonogr 2020 May; 36(3):224-232
• Contact Point Address:
  Shawn C. Roll, PhD, OTR/L, RMSKS, FAOTA, Chan Division of Occupational Science and Occupational Therapy, University of Southern California, 1540 Alcazar Street, CHP 133, Los Angeles, CA 90089-9003, USA
• Email:
  sroll@usc.edu
• Federal Fiscal Year:
  2020
• Performing Organization:
  University of Southern California - Los Angeles
• Peer Reviewed:
  True
• Start Date:
  20150930
• Source Full Name:
  Journal of Diagnostic Medical Sonography
• End Date:
  20190929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7e8a8bfbd3dd65bc02a18826aa9e78542028c19b1a37a498c462f185acc185e98b4577464af86fb3ea6fb89eb343fcfa1bd283f84ed951a27bd0327b285a3a9f
• Download URL:
  https://stacks.cdc.gov/view/cdc/223112/cdc_223112_DS1.pdf
• File Type:
  [PDF - 524.92 KB ]