physics of the lungs and breathing

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    PHYSICS OF THE LUNGSPHYSICS OF THE LUNGS

    AND BREATHINGAND BREATHING

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    PARTIKEL-PARTIKEL UDARAPARTIKEL-PARTIKEL UDARA

    INSPIRASI = 77%N2, 20,9%O2,

    0,04%CO2

    EKSPIRASI = 77%N2, 16,%O2 ,4,!%CO2

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    SISTE" PERNAFASANSISTE" PERNAFASAN

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    SISTE" PADA PARU-PARUSISTE" PADA PARU-PARU

    P#$&' ('&)*'#)+

    I*&' (#$&'

    P#$&'

    )+$&'#)+

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    SISTE" PERTUKARAN OSISTE" PERTUKARAN O22. CO. CO22

    DI AL/EOLI SECARA DIFFUSIDI AL/EOLI SECARA DIFFUSI

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    G''& #')G''& #')

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    Jarak difusi (D)Jarak difusi (D)

    GambarGambar RumusRumus

    D=D=.(N.t).(N.t)

    N=Jumlah tumbukan tiapN=Jumlah tumbukan tiapmolekul denganmolekul dengan

    molekulmolekul lainlain

    =jarak ratarata=jarak ratarata antarantar

    tumbukantumbukant=laman!a tumbukant=laman!a tumbukan

    D

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    C*3 '&'5 )+)

    8'&'5 )+) #$5# O2) '&' *)'( 1+$5, N=1010*5' *)'( 1 +$5,=10-7

    D=10-7:1010;1

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    HUKUM HUKUM FISIKA DALAM

    PERNAFASAN

    1> H5 D'#*, *$5'' ('&*)5$# '&'

    2> H5 B?#$, *$5'' '&' ) )*&'(#$&'

    > H5 L'(#'@$, *$5'' '&' ) '#$#)

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    HUKU" DALTONHUKU" DALTON

    S'* @'(&' :'&'; *$&)&) '*'+

    ('&*)5$#-('&*)5$# '+, *)'(-*)'( ('&*)5$# '+

    $$&) 5*&)+) *$5'' **'# +$'5'-

    '5' ('&*)5$# '+ )* $&'' +$)&)

    C*3 '&' '#' &'' :O2 20% .

    N20%;$&*$5'' 760 H

    T$5'' ('&*)5$# O2 20%>7601!0H

    T$5'' ('&*)5$#N2 0%>760 610H

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    T'$# *$5'' ('&+)'# OT'$# *$5'' ('&+)'# O22. CO. CO22

    S)+*$ %O2 P O2

    :H;

    %CO2 P CO2

    :H;

    I+()&'+) 20,9 1!0 0,04 0,

    '#$#) 14,0 100 !,6 40

    E()&'+) 16, 116 4,! 2

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    H5 B?#$ :P>/ = KONSTAN;

    T$5'' $&') *$&'#)5 $' #$SISTE" KER8A 5$*)5' ()+* )*'&)5, P/ .

    PP '5' $&5$' 8)5' ($'+ 5'5 5$*)5'

    ()+* )*'&)5 #$

    )*&'(#$&' $)5'*+$3)' *$5'' *&+$@'&' &'+*)+

    8)5' ($'+ #$'3, 5$*)5'()+* )*'&)5 #$)*&'(#$&' $&*''3+$)5)* +$3)' *$5''*& +$)5)*

    P$&'3' )) /

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    KO"PLIANSI

    G&')5 K$*$&'' K>N&'# &' $'+'

    0,1-0,27 #)*$&R$'3 +$)5)*($&'3' #$ *5($&'3' *$5''$+'&:)&+)+ ('&-('&;

    K>T)) ($&'3' #$

    ?' $+'& *5 ($&'3'*$5'' ?' 5$@)#:R$+()&'*&? )+*&$+++?&$TINGGI

    K>NO

    R"AL

    K>RENDAH

    /

    P

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    Resistansi "istem perna#asan(RResistansi "istem perna#asan(Rgg)$)$

    %onstanta &aktu paruparu (')%onstanta &aktu paruparu (')

    ukum ohm padaukum ohm padakelistrikan R=*+,kelistrikan R=*+,

    RRgg== --+/+/ RRgg=resistansi=resistansi

    perna#asan..perna#asan..0m0m112+(liter+se3on)2+(liter+se3on)--=erubahan=erubahantekanan40mtekanan40m1122

    /=debit 4.5iter+se3on/=debit 4.5iter+se3on

    6ntuk orang de&asa6ntuk orang de&asanormal Rnormal Rgg=787 3m =787 3m 112+2+(liter+se3on)(liter+se3on)

    ' = R' = Rg.g.00'= konstanta &aktu4"ekon'= konstanta &aktu4"ekon

    RRgg=resistansi..=resistansi..

    3m3m112+(liter+sekon)2+(liter+sekon)

    0=3ompliansi4liter+3m0=3ompliansi4liter+3m1122 %onstanta &aktu%onstanta &aktuberhubungan denganberhubungan denganbagian paruparubagian paruparu

    Jika ada bagian paruJika ada bagian paru

    paru konstantaparu konstanta&aktun!a lebih&aktun!a lebihlama8bagian tersebutlama8bagian tersebuttidak memperolahtidak memperolahudaraudara

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    H5 L'(#'@$H5 L'(#'@$

    P = 4>

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    SURFACTANTSURFACTANT

    ALVEOLIALVEOLI

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    SISTE" KER8A SURFACTANT

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    ND RITA

    ND RITA

    A(')#' '?) ?' '& #'3)& *'('A(')#' '?) ?' '& #'3)& *'('

    +&'@*'* ) ('&-('& B'?) $$&)*'+&'@*'* ) ('&-('& B'?) $$&)*'

    RDS :R$+()&'*&? )+*&$+ +?&$;RDS :R$+()&'*&? )+*&$+ +?&$;

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    PENGUKURAN PERNAFASANPENGUKURAN PERNAFASAN

    D$' +()&$*$&D$' +()&$*$&

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    *olume perna#asan*olume perna#asan