Week 5: Third stage of labour and immediate care post birth Flashcards
Define the third stage of labour
period from the birth of the baby through to delivery of the placenta and membranes and ends with the control of bleeding
Describe some physiological changes that occur post-birth
- uterus reduces in size
- placenta site is now diminished by reduces uterus
- blood is forced back into the decidua basalis by this shrinking uterus.
- Simultaneously the oblique uterine muscle
fibers constrict clamping down on the blood
vessels so that they do not drain back into the
placenta
How does the placenta detach from the uterine wall?
- As uterus shrinks
- the pressure increases within the blood
vessels the vessels burst and blood tracks
between the decidua and placenta - The leakage of blood and the diminished
surface of the placental site results in the
placenta detaching from the uterine wall - Extra weight of placenta helps to strip membranes off uterine wall
- There is formation of retro placental clot may
aid complete separation
What is a retro placental clot?
Clot that forms over the site where the placenta has just detached from.
Formation of retro placental clot may
aid complete separation of placenta from uterus.
How does the body control bleeding after birth of the placental?
Living ligatures that surround the uterus.
- Oblique muscle fibres surrounding the blood vessels contract and seal off ends of maternal vessels
Pressure
- Further contractions causes opposing walls to exert pressure on placental site
Blood clotting
- Transitory activation of the coagulation system to
intensify clot formation
- Activation of fibrinolytic system so the placental
site is covered by fibrin mesh
Placenta descends into vagina expelled by maternal
effort
What are the two ways the third stage can be managed?
Physiological management (Expectant management)
Active management
Explain physiological management, when it is safest and what it look like.
No interventions
Safest when a physiological labour & birth has occurred
- of aiming for a physiological third stage, a physiological 1st and 2nd would need to have occurred.
• Informed consent (with risks of both)
Looks like
• No clamping of cord until stopped pulsating
• Initiation of breastfeeding to initiate contraction (oxytocin) + bonding and to meet babys needs
Explain the practice of lotus birth
The spiritual practice of Lotus birth: cord is not
clamped or cut. Placenta salted and wrapped with
baby.
Explain how the placenta can be assisted to be born both actively and physiologically and what should we do post expulsion.
- Expelled by maternal effort
Assisted by maternal positioning
e. g. squatting or sitting (toilet/ relaxes/familia), by utilising the forces of gravity, will aid expulsion
- woman will usually do what feels most comfortable
- Following birth of placenta palpate the fundus to ensure it is well contracted
- Monitor PV (per vaginal) bleeding
- Takes 15 – 60mins
Always have a uterotonic drawn up ready to be given if clinically needed.
Explain active management in the second stage of labour, why is it carried out, when it is safest and what 4 key pratice points it includes.
Active management involved interventions.
Goal of active management: prevent PPH
Purpose
- Helps prevent postpartum haemorrhage (blood loss
>500ml)
- Anticipated completion fo active management 30 minutes
Active management includes:
1. The use of a uterotonic agent
- Clamping and cutting of the umbilical cord within 2-3
minutes of birth - Controlled cord traction while ‘guarding the uterus’
- Uterine massage after the expulsion of the placenta
What amount of blood is considered a post partum haemorrhage?
Postpartum haemorrhage= blood loss > 500ml
Whar are uterotonic agents and what is their role? list some examples.
- artificial hormones that stimulate string contractions
e. g. (most common)
- syntocinon
- Ergometrine
- Syntometrine (combination of the above two)
What do you need to be aware of when using ergometrine? (uterotonic caution)
- it is associated with hypertension, nausea and vomiting.
History of pre eclampsia just go with syntocinon not syntometrine or ergometrine
Describe syntocinon. Its dose, mode of action, response time and length of action.
Dose: 10 IU IM
Mode of action: rapid uterine contraction by smooth muscle tissue contraction
Response time: 2-3 mins
Length of action: 15-30 mins
Describe syntometrine. Its dose, mode of action, response time and length of action.
Dose: 1ml IM
which contains 5 IU oxytocin (half dose) and 0.5mg ergometrine
Mode of action: combines the rapid uterine action of oxytocin/syntocinon, with the sustained uterotonic effects of ergometrine
Response time: 2-3 mins
(Oxytocin/Syntocinon acts in 2-3 mins)
(Ergometrine acts in 6-7 mins)
Length of action: 2-4 hours
Describe ergometrine. Its dose, mode of action, response time, length of action and a key practice point of when it is used.
Dose: 2.5mgs IM or IV (diluted)
Mode of action: Sustained uterotonic effect on
smooth muscle
Response time 6-7 mins if given IM
Length of action: 2 - 4 hours
Usually not the drug of choice in the
management of the third stage, more so in the
management of PPH.
Explain early cord clamping and the benefits it prevents.
clamping of the cord <1 minute following
the birth of the baby
- Reduces transfer of blood to baby
- Placenta does not reduce so much in size therefore…
- Delayed separation (thus increased risk of retained placenta)
• Reduced iron stores for the infant, and increased incidence of
hypotension and intraventricular haemorrhage
• Early umbilical cord clamping (less than 1 min after birth) is not recommended unless the neonate is asphyxiated and needs to be moved immediately for resuscitation (WHO, 2012)
Explain delayed cord clamping and the benefits
Delayed cord clamping (performed approximately 1–3min after birth) for all births, while initiating
simultaneous essential neonatal care.
- Delayed CC for approximately two minutes in
healthy term infants, will promote better iron
stores in infants in the longer term. - Delayed CC does not require delayed
administration of oxytocin in the active
management of the third stage of labour.
Define a retained placenta
If a placenta hasn’t been born within
Active management: 30mins after baby
Physiological: 60mins after baby
When should the uterotonic/oxytocic be administered?
when anterior shoulder shows or immediatley following the borth of the baby (within 1 minute)
- wait 2-3mins for ocytocic to have effect then cord can be reviewed for clamp and cut.
- clamp or cut cord
Whos role is the prep and administration of the uterotonic/oxytocics?
The secondary/receiving midwife.
Primary midwife/acousha
not their job
Explain the active management technique of CCT
Controlled cord traction
- place hand on abdomen to find fundus
- detect contractions and placental separation.
- gently but firmly pull on word in a downward motion
0 hold caord and apply tension then wait for next contraction to put on more tension.
- continually apply counter traction to the uterus with other hand.
When placenta separates
- mother will feel the urge to push again
- mother may feel same pain
- uterus begins to rise and involute
- small trickle of blood
List some signs the placenta has seperated and what can be done if none are observed?
- small trickle of blood
- mother will feel the urge to push again
- urterus contracting or rising up
- lengthening of the cord
If no signs of separation are observed
- gently begin gentle controlled cord traction in. a downwards motion whilst guarding the uterus.
What are key points of practice points for delayed cord camping?
- firm but cautious
- gentle
- clamp cord close to perineum
- hold cord and clamp in one hand
- use other hand to stabilise the uterus on abdomen ()this will also allow you to feel if it is not separated