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IOKIMIA
PERNAPASAN
dr. Edyson, M. Kes.
Bagian Kimia-Biokimia
KedokteranFK Unlam-RSUD Ulin
2014
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Tujuan
Menjelaskan struktur hemoglobin
Menjelaskan tranpor O2
Menjelaskan tranpor O2
Menjelaskan keseimbangan asam basa
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Struktur !emoglobin
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"ambaran #mum Transpor O2 $ O2
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Transpor %i Paru& Eritrosit $ 'aringan
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Kur(a Saturasi
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Keseimbangan Asam Basa
Terjadi dalam darah
Organ yang terlibat langsung :
paru & ginjal
Sistem buffer
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Konsentrasi Ion ! %alam %arah
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Sistem u))er %alam Plasma
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Penilaian Status
Keseimbangan asam basa normal
melibatkan sistem dapar bikarbonat
[H+] + [HO!"] [H#O!]
[H+] $ K [H#O!] % [HO!"] [H+] $ O# % [HO!"]
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Konsep $ Terminologi
enilaian status asam basa dgn' (gukur
[H+] ) [HO!"] & O# yg merupakan
komponen sistem dapar bikarbonat dlm'
plasma
(enambah [H+]) mgeluarkn [HO!"] atau
mningkatkn O# knaikan [H+]
(ngeluarkn [H+]) menambah [HO!"] atau
mnurunkan O# mnurunkan [H+]
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"angguan Asam Basa Metabolik
Kasus"kasus bhub' produksi & ekskresi H+
tlihat dari [HO!"]
*sidosis $ ekskresi H+ terganggu)
pbentukn%ingesti H+ mningkat) khilangan
[HO!"]
*lkolosis $ khilangan H+) muntah) ingesti
alkali) defisiensi kalium
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"angguan Asam Basa Respiratorik
Kasus"kasus bhub' produksi & ekskresi H+) O# & [HO!"]
*sidosis $ sesak napas) bronkopneumonia) cronicobstructive airways disease COAD, "- .ontoh
serangan asma mdadak
*lkolosis $ bnapas --- histeris) o/er/entilasi
mekanis) pningkatn tekanan intrakranial
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