Obs and Gynae Peer Teaching Flashcards
What gestation is normal labour
37 to 42 weeks
Role of prostaglandin in labour
Reduces cervical resistance (cervical ripening) and increased release of oxytocin from posterior pituitary
Role of oxytocin in labour
Stimulates uterine contraction
2 things needed for diagnosis of labour
Painful, regular, progressive uterine contractions
Cervical dilatation and effacement
Describe the latent first phase of labour
Cervix efface and dilate up to 4cm
Describe the active first phase of labour
Progressive cervical dilatation from 4-10cm. Regular painful contractions
Describe the second stage of labour
Full cervical dilatation until birth of baby
Describe the third stage of labour
Delivery of baby to delivery of placenta
How long is latent phase
18hr first, then 12 hour for second baby
What makes you suspect fialure to progress
Less than 2cm dilatation in 2 hours. Arrested descent/ slowing of progress in multips
Causes of abnormal first stage of labour
Inefficient uterine contractions
Cephalopelvic disproportion
Who most commonly gets inefficient uterine contractions in labour and what is the management
Nulliparous.
Amniotomoy and syntocin
Who most commonly gets cephalopelvic disproportion, what are the signs and whats the management
Multiparous women
Caput and moulding are the signs. Secondary arrest (previously good progress).
Do a c section
What counts as a prolonged 2nd stage of labour
2hr of active pushing in nulliparous, 1hr of active pushing in multiparous
What is the management of prolonged 2nd stage
Assisted vaginal delivery or c section
What is a 1st degree tear
Laceration of vaginal epithelium or perineal skin only
What is a 2nd degree tear
Involvement of the perineal muscles but not the sphincter
What is a 3rd degree tear
Disruption of the anal sphincter muscles
What is a 4th degree tear
Disruption of the anal epithelium as well
What is physiological management of 3rd stage
No Syntometrine or syntocin
Cord stops pulsating before clamping
Maternal effort to deliver placenta
When do you change to active 3rd stage of labour management
Haemorrhage or placenta not delivered by 1hr. Reduces risk of PPH
What is the active management of the 3rd stage of labour
IM syntocin
Deferred clamping and cutting of cord
Controlled cord traction
Definition of gestational diabetes
Carbohydrate intolerance which is diagnosed in pregnancy
Why does gestational diabetes happen
Reduced glucose tolerance due to change in carbohydrate metabolism
Antagonistic effect of human placental lactogen, progesterone and cortisol