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[Ultrasonography of normal vermiform appendix].

E Ferri1, U Bonvicini, M Pisani

  • 1Unità Operativa Chirurgia II, AUSL 3, Via Taverna, 29100 Piacenza.

Chirurgia Italiana
|June 9, 2001
PubMed
Summary

Ultrasonography can visualize the normal vermiform appendix in adults, aiding diagnosis. This imaging technique helps identify appendix characteristics and exclude appendicitis.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Gastrointestinal Imaging

Background:

  • The vermiform appendix is a crucial anatomical structure.
  • Accurate visualization of the appendix is essential for diagnosing abdominal conditions, particularly appendicitis.
  • Conventional diagnostic methods may have limitations in visualizing the normal appendix.

Purpose of the Study:

  • To detect and visualize the normal vermiform appendix using ultrasonography in adults without acute or chronic abdominal disease.
  • To characterize the normal appendix's features via ultrasound.
  • To assess the efficacy of graded-compression ultrasonography in visualizing the appendix.

Main Methods:

  • A prospective study involving 200 adult subjects.
  • Utilized graded-compression ultrasonography with 4 MHz sector, 7.5 MHz linear, and occasionally 10 MHz linear array transducers.
  • Focused on the lower right quadrant of the abdomen and pelvis.

Main Results:

  • The vermiform appendix was visualized in 54% of patients.
  • The appendix was located on the ileo-psoas muscle or beneath the abdominal wall when visualized.
  • The ileo-caecal valve was seen in 78% of cases; normal appendix diameter was ≤6.5 mm, wall thickness ≤2.5 mm.

Conclusions:

  • Graded-compression ultrasonography is effective for visualizing the normal vermiform appendix more frequently than previously reported.
  • Patient's physical constitution and appendix anatomical location significantly impact visualization.
  • Successful ultrasonographic visualization of the normal appendix supports clinical diagnosis and helps rule out acute appendicitis.

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