World Library  
Flag as Inappropriate
Email this Article

Reid index

Article Id: WHEBN0007601777
Reproduction Date:

Title: Reid index  
Author: World Heritage Encyclopedia
Language: English
Subject: Respiratory system, Curschmann's spirals, Hampton hump, Whispered pectoriloquy, Trepopnea
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Reid index

The Reid Index is a mathematical relationship that exists in a human bronchus section observed under the microscope. It is defined as ratio between the thickness of the submucosal mucus secreting glands and the thickness between the epithelium and cartilage that covers the bronchi. The Reid index is not of diagnostic use in vivo since it requires a dissection of the airway tube, but it has value in post mortem evaluations and for research.[1]

Calculation

\ RI = \frac {gland}{wall}

where:

RI is the Reid Index
wall is the thickness of the airway wall between the epithelium and the cartilage's perichondrium
gland is the thickness of the mucous producing gland at the location of inspection.

Interpretation

A normal Reid Index should be smaller than 0.4, the thickness of the wall is always more than double the thickness of the glands it contains. Chronic smoking causes submucosal gland hypertrophy and hyperplasia, leading to a Reid Index of >0.5 indicating chronic bronchitis.[2]

References

  1. ^ B. Karger, T. Fracasso, B. Brinkmann and T. Bajanowski. Evaluation of the Reid index in infants and cases of SIDS. International Journal of Legal Medicine. Volume 118, Number 4 / August, 2004. [1]
  2. ^ School of Medicine, Tulane University
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.