fetal lung development

  1. 5 periods of embryonic lung development
    • Embryonic Period
    • Pseudoglandular Period
    • Canalicular Period
    • Saccular Period
    • Alveolar Period
  2. ages of neonate
    birth - 1st month
  3. ages of infant
    month - 1 year
  4. ages of child
    > 1 year
  5. how many weeks is a normal gestation
    40 weeks
  6. 15 million alveoli when born -- 200 million in what age?
    8 years old
  7. goblet cells produces
  8. when molecules pull tight together at air liquid surface it is called:
    cohesion forces
  9. surfactant lowers
    surface tension
  10. what is the function of lung surfactant
    lowers pt pace of breathing from the alveoli
  11. 3 composition of surfactant
    • sphingomyelin
    • phosphatidylglycerol (PG)
    • phosphatidylcholine (PC--Lecithin)
  12. immature surfactant occurs
    first 24 weeks, not in ratio
  13. mature surfactant occurs
    34 weeks gestation -- big peak in Lecithin and PG occurs
  14. what is L/S ratio

    accesses lung maturity
  15. how many umbilical vein?
  16. what does the umbilical vein carry?
  17. how many umbilical arteries
  18. what does the umbilical arteries carry
  19. what are the 3 unique shunts
    • ductus venosus
    • foramen ocale
    • ductus arteriosus
  20. where can you find the ductus venosus
    within the liver, 50% of blood
  21. where can you find the foramen ovale
    btwn right and left atrium
  22. where can you find the ductus arteriosus
    commonly btwn aorta and pulm arteries
  23. what is the l/s ratio that considers mature ratio
  24. where in the heart of the fetal lung that the pressure is higher?
    right side has higher pressure than the left side of the heart
  25. fetal lung serves no gas exhange before birth -- therefore, gas exhange via
    umbilical cord and placenta
  26. premature babies has not enough surfactant therefore developes
    resp distress
  27. what is the primary reason that the ductus arteriosus closes
    increase po2
  28. how many percent of blood goes to the fetal lung
  29. what happens once the umbilical cord is clamped
    • flips pressures around
    • dec blood flow from lower extremities
    • fetus starts to breath/cry
    • inc pulm blood flow
    • inc po2
    • dec pressure on right of the heart
  30. in utero the fetus lives in
    hypoxic stage
  31. what age is a high risk delivery
    • < 16
    • > 40
  32. what medical factors risk delivery
    • htn
    • diabetes
    • miscarriages
  33. what type of toxic habits factors risk delivery
    • alcohol
    • drugs
    • cig smoking
    • cocaine
  34. gestational diabetes - glucose tolerance =
    large babies
  35. how many weeks is pre term labor
    < 38 weeks
  36. how many weeks is post term labor
    > 42 weeks
  37. what can stop contraction
    magnesium sulfate
  38. what type of drug can induce labor or contraction
  39. name 3 problems thats associated with the umbilical cord and placenta
    • prolapse of the umbilical cord
    • placenta previa
    • placental abruption
  40. compressed btwn birth canel to fetus
    prolapse of the umbilical cord
  41. partially or complete covers opening of cervix
    placenta previa
  42. premature seperation of placenta. common cause of meternal htn. fetal blood loss and vaginal bleeding
    placental abruption
  43. assessing the fetus in utero
    • ultrasound
    • amniocentesis
    • fetal heart monitoring
  44. access fetus in utero
    sees organs, fetal growth, abnormality
  45. l/s ratio test, genetic chromosomes, down syndrome testing and macronium (fetal poop)
  46. name 2 types of fetal heart monitoring
    • non stress test NST
    • contraction stress test CST
Card Set
fetal lung development
fetal lung development