Alle geziene leerstof over respiratoire insufficiëntie in fundament 2 van verpleegkunde in Leuven - Duidelijke structuur - Duidelijke foto's - Genummerde pagina's
- Luchtwegobstructie als gevolg va chronische bronchitis, longemfyseem
- Plotse toename van hypoxemie, hypercapnie
3. Alveolaire ventilatie
AV = TTV – DRV
TTV: totale ventilatie
DRV: dode ruimte ventilatie
= Hoeveelheid lucht/min in contact met respiratoir epitheel
3.2.2 Fysiologische dode ruimte
= Volume van ingeademde luchtmengsel dat niet deelneemt aan gasuitwisseling
3.3 Ventilatie, perfusieverhouding (V/Q)
V = 4l/min
Q = 5l/min
V/Q = 0,5 - 2
Va/Q mismatching
3.3.2 Shunting
= zuurstofarm bloed in arteriële circulatie
Longgebeiden die goed doorbloed zijn slecht geventileerd bloed neemt onvoldoende zuurstof
op geshunt bloed V/Q ratio is laag (V: laag, Q: hoog)
- Anatomische shunting: 2% van totale longcirculatie (pleura, bronchi)
- Rechts-linksshunt: cyanotisch congenitaal hartgebrek (patent foramen)
3.3.3 Belang hartdebiet
Speelt grote rol in de aanpassing van zuurtsofaanvoer aan zuurstofgebruik (HD = PF X SV)
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