Transition to Extrauterine Life for Peds

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Author:
servinggod247
ID:
294751
Filename:
Transition to Extrauterine Life for Peds
Updated:
2015-02-03 13:36:53
Tags:
pediatrics
Folders:
pediatrics
Description:
Exam 1
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  1. What is the Ductus Venosa
    Connects the umbilical vein to the fetal inferior vena cava (IVC)
  2. What causes the blood to by pass the liver?
    The Ductus Venosus
  3. When does the Ductus Venosus close?
    about 1 week of age
  4. Most of the red blood goes across the
    PFO
  5. What connects main pulomary artery (PA) to the descending aorta (Ao)?
    ductus arteriosus
  6. What diverts blood away from the lungs
    Ductus Arteriosus
  7. The muscular structure of the ductus arteriosus is about
    10 mm in diameter
  8. Functional closure of the Ductus Arteriosus occurs when
    3-4 days
  9. Anatomic closure of the Ductus Arteriosus occurs when ?
    around 2 months
  10. After birth, what can reopen the Ductus Arteriosus?
    hypoxemia or an increase in porstaglandins E1

    IMPORTANT
  11. Patent Forman Ovale
    Flab between the right atrium and left atrium
  12. Blood shunts across from right to left atrium through what?
    Patent Foramen Ovale
  13. ________________ often persists in infancy, especially in NAS babies, of no consequence, called "normal for age"
    PFO
  14. Impediment to blood flow through a vessel
    vascular resistance
  15. Pressure as measured by the size of the arteries and arterioles in the pulmonary vascular bed
    pulmonary vascular resistance (PVR
  16. Pressure as measured by the size of the arteries in the peripheral vascular bed
    Systemic vascular resistance (SVR)
  17. Flow goes where?
    resistance is lease 


    IMPORTANT
  18. Resistance is governed by
    the size of the blood vessels (size of the vessel dictated by the muscularity 

    IMPORTANT
  19. In newborns, the _________ is the dominant pumping chamber
    RIGHT
  20. Respiratory distress is associated with
    heart failure
  21. PVR and SVR in Fetus
    • PVR is HIGH 
    • SVR is LOW

    PVR is high because you dont want blood to go to the lungs, want it to go to the body 

    PVR drops when they are born so the lungs can get blood, SVR rises
  22. Fetal breathing movements begin at
    11 weeks

    she skipped slide in class
  23. In fetal lungs, pulmonary arterioles are ________
    constricted

    she skipped slide in class
  24. Fetal lung fluid is secreted by the lungs and decreases when?
    as term approaches

    she skipped slide in class
  25. The fetus breathes in and out fetal lung fluid through
    the trachea

    she skipped slide in class
  26. Once the Cord is clamped.........
    Infant cries

    Supply from placenta is abruptly cut

    Umblical veins and arteries constrict

    Blood no longer flows through the fetal circuit

    Sudden increase in SVR

    she skipped slide in class
  27. Neonatal Circulation
    DA closes ( increase in pO2) and abesence of prostglandins

    PFO shuts (SVR rises---> LA rises and slams shut PFO)

    PFO is later sealed by fibrin 

    Often PFO persists in neonatal period (no significance)

    PFO Can reopen if RA pressure incraseas significantly

    she skipped slide in class
  28. When the PFO shuts after birth , SVR rises and the
    Left atrium rises and slams shut PFO

    she skipped slide in class
  29. What seals the PFO
    fibrin

    she skipped slide in class
  30. If the PFO persists in the neonatal period, is something wrong?
    No

    she skipped slide in class
  31. When can the PFO reopen
    If the Right Atrium pressure increases significantly

    she skipped slide in class

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