Week 1 Maternal & Fetal 1 of 4 Flashcards Preview

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Flashcards in Week 1 Maternal & Fetal 1 of 4 Deck (57)
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31

Maternal Cardiovascular Changes:

SVR does?

decrease ~ 20%

32

Supine hypotensive Syndrome is due to:

compression of aorta IVC by gravid uterus in supine position (at term)

33

Symptoms of Supine Hypotensive syndrome:

  • pallor
  • sweating
  • n/v
  • dizziness
  • tachycardia
  • veritgo
  • apprehension
  • Change in mental status

34

TX of supine hypotensive syndrome: 

-avoid supine position

- Left Lateral positioning - right hip up 10-15 cm

35

in supine hypotensive syndrome the inferior vena cave is compressed against:

the vertebral column

36

Maternal Respiratory Changes:

Oxygen consumption

Increases (50%)

37

Maternal Respiratory Changes:


Minute ventilation

increases ~50%

38

Maternal Respiratory Changes:


Tidal Volume

Increases

39

Maternal Respiratory Changes:


Resp. Rate

increases

40

Maternal Respiratory Changes:

PO2

increases

41

Maternal Respiratory Changes:


PCO2

Decreases

42

Maternal Respiratory Changes:


PCO2 PRODUCTION

increases

43

Maternal Respiratory Changes:


HCO3

Decreases

44

Maternal Respiratory Changes:


P50

Inceases

45

Maternal Respiratory Changes:


FRC

Decreases

46

Maternal Respiratory Changes:


risk of hypoxemia

increases 

(d/t decreased FRC)

47

Name the Respiratory Changes that happen during pregnancy that DECREASE:

  • PCO2 (production increases though)
  • HCO3
  • FRC

48

Displacement of the diaphragm is about how much (cm) and which direction? Why?

-4cm superiorly

-D/T expanding uterus

49

Increased Alveolar ventilation by what %

70%

50

How much does FRC decrease?

20%

51

There is NO change in what? (respiratory wise)

  • Dead space
  • lung compliance
  • pH
  • VC (vital capacity)
  • FEV 
  • FEV1 
  • diffusion capacity

52

Maternal hyperventilation causes;

fetal hypoxia and respiratory acidosis

53

The extreme hyperventilation of mom causes fetal hypoxia and respiratory acidosis by:

  1. Vasoconstriction of umbilical BF (decreased CO2)
  2.  LEFT shift of O2-hb curve

54

Mild hyperventilation is safe but what do we need to monitor?

fetal HR

55

Very high risk of hypoxia in preganancy d/t:

  1. Decreased FRC
  2. Increased O2 Consumption
  3. Increased A-a Gradient

56

Airway edema during pregnancy indicates what precations:

  • potentially difficult intubation
  • high risk of bleeding
  • use smaller ETT (6-7mm)

57

Is pregnancy considered a restrictive or obstructive lung condition?

Both technically. 

 

Restrictive for the most part (fetal/uterus growth restricts lung expansion) but can have Obstructive elements d/t edema, swelling, etc as well.