CBL 7_Third Stage Management, Placentas, Newborn Innocent Heart Murmur Flashcards

1
Q

Recs on VEs and PROM?

A

Don’t do till active labour or IOL = the increased risk of infection

Risk rises with the number of examinations done.

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2
Q

Baths with PROM?

A

There is no evidence that bathing or showering increases the risk of infection. (8) But at the same time, AOM patient handout: Recommends NO baths until active labour!

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3
Q

Does PROM alone as a risk factor merit CEFM?

A

Fetal monitoring and PROM: No research literature was found to suggest that PROM or prolonged ROM in the absence of any evidence of fetal compromise is an indication for continuous electronic fetal monitoring”

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4
Q

What is considered a normal Apgar score?

A

7-10

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5
Q

What APGAR needed for transfer of care to peds?

A

Lower than 7 at 10 mins

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6
Q

Supporting PMTSL? (9)

A
  • supporting psychosocial, emotional, and spiritual needs, including cultural and traditional practices of the woman/person’s choice (see also Cultural Safety and Cultural Humility and Beliefs and Practices)
  • presence of support person(s) of the woman/person’s choice to promote feelings of comfort and safety (12)
  • comfortable and warm environment conducive to feelings and sensations of calm, relaxation, mindfulness, and safety (see also Birth Options and Practices that Promote Healthy Birthing and Planned Place of Birth)
  • encouraging an upright position to facilitate birth of the placenta, with or without bearing down with contractions
  • no fundal massage prior to expulsion of the placenta
  • watching for signs of excessive blood loss
  • observing for direct and indirect signs of placental separation, including signs observed by the woman/person
  • occasionally lifting or easing the cord to bring out the placenta once separation has occurred
  • facilitating immediate skin-to-skin care and early breast/chest feeding (see Lactation and Newborn Feeding Support [Postpartum], Safer Infant Sleep, and Golden Hour for Healthy Late Preterm and Term Babies)
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7
Q

How much oxy for AMTSL IV?

A

3 IU now

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8
Q

Is CCT necessary for AMTSL?

A

Not a fundamental component but may aid quicker delivery of the placenta with skilled provider

Does not significantly reduce occurrence of PPH

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9
Q

When should CCT be done if done at all?

A

After admin of oxy

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10
Q

How does delayed cord clamping support newborn transition? (6)

A
  • Increases RBCs and Hgb
  • Improves iron stores
  • Increase blood volume
  • Improves transitional circulation
  • Decreases need for transfusion
  • Does not increase risks PPH
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11
Q

Mechanics/Impact of cutting cord too early? (4)

A

Early cord clamping prior to onset of lung aeration:

  • restricts flow to the ventricles.
  • failure to establish ventilation
  • pulmonary vascular resistance (PVR) remains high and compromises pulmonary blood flow (increased right to left DA shunt) and venous return to the left ventricle.
  • Decreased filling of the left ventricle (preload) and increased afterload (due to removal of low-resistance placenta) compromise cardiac output. DA, ductus arteriosus; LA, left atrium
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12
Q

How long should you delay cord clamping?

A

1) Most guidelines recommend 60s; controversy about >60sec for possible jaundice, but
2) timing of CC and association with hyperbilirubinemia is not evidence-based
3) new research is emerging for benefits for >120s for preterm babes with ventilation at 30sec that may change future practice for term babes

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13
Q

Explain jaundice and DCC?

A

Benefits of DCC = reduced risk of anemia

Risk of jaundice needing phototherapy if >60 s (but need more research) - this appears to no longer be evidence based

ONTARIO data has shown NO increased risk of neonatal jaundice in midwifery clients who have had DCC

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14
Q

How long is reccomended time for DCC the new research for preterm infants?

A

120 seconds from 60 seconds

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15
Q

Technique for cord gas collection?

A

There are two possible approaches to sampling
1. Draw samples as soon as possible after birth.
* The care provider double clamps the cord and takes the two samples using heparinized syringes.
* Draw the arterial sample first, as these are the smaller vessels and are easier to visually identify when compared to the plump vein vessel. If only one sample can be obtained, take the blood sample from the umbilical artery.
* Avoid drawing air bubbles and/or carefully expel any air from the syringe
* Cap the heparinized syringes and place on ice to stop the glycolysis.
* Samples are stable at room temperature for 60 minutes (Manor, et al., 1998). If not analyzed within 60 minutes, the sample should be stored at 4−8°C and the time of analysis documented.
2. Set aside a double-clamped segment of the cord for blood to be drawn later after the baby’s condition is assessed.
* The umbilical cord can be doubly clamped and cut to isolate a 20–30 cm segment and set aside for later sampling and analysis, collecting samples as described above.
* Lynn & Beeby (2007) found that when a segment of cord was obtained and set aside for sampling, there was a continuous fall in both pH and BE/BD by 30 minutes after birth and ongoing to further sampling at 60 and 90 minutes post birth. They concluded that sampling should be done as soon as possible following birth to best reflect the neonatal acid-base status at the time of birth.
* A sample taken from an unclamped cord is unreliable for pH, base deficit or lactate by 2 minutes (Armstrong & Stenson, 2006).
Based on current evidence and pending further research, it would appear prudent to obtain the sample as soon as possible after birth. If delays in sampling occur, this should be noted on the medical record for interpretation and quality assurance review’

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16
Q

Describe metabolic acidosis?

A

From FHS online manual, Chapter 3; ‘Metabolic acidosis is a pH imbalance that occurs when the level of hydrogen ions (H+) in the body increases and there is insufficient bicarbonate (HCO3) or other buffer bases to neutralize the acid. Metabolic acidosis occurs when:
Glucose metabolism + lack of oxygen = production of lactic acid
When the fetus is in a less-than-optimal oxygen environment (e.g., uteroplacental dysfunction, decreased maternal oxygenation), it generates required energy from glucose stores through a process of anaerobic metabolism. This leads to the production of lactic acid and other acids which build up in cells throughout the body and in organ systems which leads to metabolic acidosis. The body will attempt to maintain a state of equilibrium and use a buffer (bicarbonate) to “mop up” the excess hydrogen ions (the acid). Lactic acid, unlike carbonic acid, is a fixed acid and is excreted across the placenta at a slow rate. Metabolic acidosis takes hours to correct, even when sufficient oxygen is restored’
HCO3 = bicarb (buffer/ substance that interacts with acids in the body to minimize change in pH
BE or BD = base deficit/ excess; refers to the # of units of base required to neutralize the amount of acidosis occurring. Will be +/-

17
Q

When should we do cord gases?

A

Before DCC not after

18
Q

Should cord gases be taken routinely?

A

probably not
Abnormal cord gases is an uncommon finding in low risk births and the gases asssociaton with composite adverse neonatal outcomes is not clinically relevant. So routinely cord gases should be questioned.

19
Q

How does dcc effect blood volume? (4)

A

Newborn’s blood volume is key to successful transition. DCC:

Intact NB blood volume:

1 – capillaries scafold the alveioli assisting in the opening of the alveoli – at birth the capillaries (attached to the alveoli) fill fully with blood for the first time (blood volume going to the lungs increases from 8 to 45-50%). The capillaries expand, become erect and actively open and support the alveoli. This erect scaffolding supports them to remain open and not collapse with exhalation.
2 – Clears lung fluid out assisting in clearing lung fluid from the alveoli immediately following birth - this does not happen with suctioning or the physical ‘squeeze’ of being born. Neither is lung fluid absorbed into ‘lung tissue’ as this does not exist. The only way to clear ‘lung fluid’ is through circulation established at birth. Higher colloidal osmotic pressure of the blood in the capillaries surrounding each alveoli draws the fluid from the alveoli into the systemic circulation.
3 - increased perfusionUmbilical circulation continues to provide O2, volume expansion, pH correction, and enhanced perfusion to all organs
4 – oxygen to brain = better breathing Enhanced blood volume means better brain perfusion which will support stimulation of the respiratory centre

20
Q

How much does AMTSL reduce PPH?

A

reduces PPH by up to 40% and severe PPH by 60-70%

21
Q

What are heart murmers?

A

result of turbulent blood flow in the chambers of the heart; often sound like low pitched humming sounds and are a longer duration than other sounds; can be normal adaptation to extrauterine life

22
Q

What should you identify w heart murmer? (5)

A
  • timing
  • location
  • intensity
  • radiation
  • quality
  • pitch
23
Q

What is a systolic murmur?

A

when heart contracts (following closure mitral and tricuspid valves just after S1)

24
Q

What is a diastolic murmur?

A

when heart relaxes and chambers fill with blood (following closure aortic and pulmonary valves just after S2)

25
Q

What does a murmur need to be benign?

A

present without other signs of distress in newborn

26
Q

Common benign murmurs? (3)

A

Early soft mid-systolic ejection murmur
Systolic ejection murmur
Continous systolic murmur

27
Q

Common pathological murmurs? (2)

A

Loud systolic ejection murmur
Continous murmur

28
Q

Common characteristics of benign murmurs?(3)

A

Usually systolic
Common first 24-48 hours
Usully soft

29
Q

Contraindications to DCC? (4)

A
  • Fetal hydrops
  • Need for immediate maternal/fetal resuscitation (unless ability to do so cord intact)
  • Vasa previa
  • Twin-to-twin transfusion syndrome
30
Q

You hear a soft (grade 1-2/6) murmur in the along the mid-left sternal border immediately after S1. What kind of murmur is this likely?

A

a systolic ejection murmur

31
Q

When does BCCNM say to consult peds for murmur?

A

Abnormal heart rate pattern or persistent/symptomatic murmur

32
Q

Why does systolic ejection murmur happen?

A

Happens because of the dramatic increase in flow of blood across the pulmonary valve with the quickly decreasing pulmonary vascular resistance as newborrn heart transitions from fetal heart

33
Q

What does an systolic ejection murmur sound like?

A

heard along mid/upper sternal border and sounds ‘vibratory’

Usually appears a few hours after birth

34
Q

What should you do with any murmur?

A

All newborn murmurs require ongoing surveillance and further investigation – including pulse oximetry and/or consultation with a doctor

35
Q

Cord gases for metabolic acidosis? **

A

arterial blood
pH less than 7.0
base deficit = or greater than 12.0

36
Q

What does a base deficit/excess mean?

A

metabolic acidosis - compromised babe

37
Q

Strong risk factor for PPH? (6)

A

History of PPH (3x increase)
Placenta Previa
Uterine fibroids
High vaginal lacerations
Cervical lacerations
Retained Placenta