SDN members see fewer ads and full resolution images. Join our non-profit community!

lung compliance

Discussion in 'NBDE Exams & Licensure Exams' started by mission dds, May 10, 2007.

  1. mission dds

    mission dds 2+ Year Member

    31
    0
    Apr 2, 2007
    can anyone plz explain me the relationship between lung compliance and lung recoil.thanks in advance
     
  2. SDN Members don't see this ad. About the ads.
  3. asdf84

    asdf84 5+ Year Member

    153
    0
    Nov 18, 2006
    recoil is d force to expel air from lung.and compliance is lung capacity for air volume.more compliance needs larger recoil to expel out large volume of air.okie.
     
  4. mission dds

    mission dds 2+ Year Member

    31
    0
    Apr 2, 2007
    thanks a lot
     
  5. edentulous

    edentulous 2+ Year Member

    16
    0
    Oct 3, 2006
    Hi!
    recoil and compliance are a bit difficult to grasp, But Ill try to explain

    Compliance : The ease of distensibility of lungs with an increase of air pressure entering the lung . (it is not the distensibility itself). Say u increase the pressure in 2 different lungs by 1mm of hg , 1 lung expands by 10ml (more compliant) and teh other by 5 ml (less compliant)

    Interplural pressure : The -ve pressure in the thin film of "plural fluid" bw chest wall and the lung ( THIS KEEPS THE LUNG INFLATED and i given a ngtive value as there is a partial vaccume in the thorasic cavity )

    Recoil : The force that tries to "collapse" the lungs (OPPOSES INTERPLEURAL PRESSURE and thus has a positive value) And is contributed by elastic property of collage and elastin in the lung (alpha-antitrypsin deficiency targets this property)

    Relation b/w compliance and recoil : The more force that pulls lungs inwards (recoil) the harder it is to expand/distend the lungs , Therefore the LESS is the compliance and vice versa .

    SO in a nutshell " recoil and interpleural pressure are opposite forces of deflation and inflation respectively , and the interplay b/w them determines the lung compliance ( easy of inflation)
    good luck with that
     
  6. DENTZY

    DENTZY 2+ Year Member

    71
    0
    Sep 14, 2006
    That is the right explanation.:thumbup:
     
  7. pacbum

    pacbum 7+ Year Member

    431
    0
    Oct 9, 2006

    pretty good explanation of lung mechanics...now let's see some differential equations, haha
     
  8. mission dds

    mission dds 2+ Year Member

    31
    0
    Apr 2, 2007
    hi edentulous
    thanks a ton for the explanation.:)
     
  9. edentulous

    edentulous 2+ Year Member

    16
    0
    Oct 3, 2006
    You are most welcome sir/madame !
     

Share This Page