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Samenvatting OWG 3.6 Foetale circulatie $7.07   Add to cart

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Samenvatting OWG 3.6 Foetale circulatie

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Uitgewerkte OWG over de fysiologie van de foetale circulatie. Inclusief probleemstelling en leerdoelen.

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  • January 16, 2024
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  • 2022/2023
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OWG 3.6 Foetale circulatie
Probleemstelling: Wat is de anatomie en fysiologie van de foetale tractus circulatorius en
respiratorius?

Leerdoelen:
1. Wat is de anatomie en de fysiologie van de foetale tractus circulatorius?
2. Wat is de anatomie en de fysiologie van de foetale tractus respiratorius?
3. Hoe ontwikkelen de foetale longen zich?
4. Wat is het verschil in de bloedsamenstelling van de foetus t.o.v. maternaal?
5. Hoe ontwikkelt de foetale hartfrequentie zich, en hoe wordt deze beïnvloed?

, 1. Wat is de anatomie en de fysiologie van de foetale tractus circulatorius?

De foetus is afhankelijk van de placenta voor ademhaling, voeding en uitscheiding. Het foetale bloed
circuleert door de placenta om aan deze behoeften te voldoen. De foetale circulatie verschilt van de
circulatie bij volwassenen doordat het bloed zuurstof krijgt in de placenta en niet in de longen.
Hiervoor is nodig:
- Grotere en talrijkere erytrocyten (6 tot 7 miljoen/mm3 )
- Hoger hemoglobinegehalte (20,7 g/dL) om de maximale hoeveelheid zuurstof op te nemen
- Gewijzigde vorm van hemoglobine (HbF), die actief is in het iets zuurdere bloed
- Extra foetale structuren
* Ductus arteriosus
* Ductus venosus
* Foramen ovale
* Twee hypogastrische slagaders

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