Obstetrics Flashcards
Nullipara
A woman who has never been pregnant beyond 20 weeks gestation
Gravid
The number of pregnancies, regardless of outcome
Para/parity
The number of babies born after 20 weeks gestation
G6,P4
Pregnant 6 times (includes current pregnancy) and previously delivered 4 babies at more than 20 weeks gestation
Grand multipara
A woman who has delivered 5 or more babies at more than 20 weeks gestation
Abortion/miscarriage
Pregnancy loss before 20 weeks gestation
Labour
Regular painful contractions with cervical change after 20 weeks gestation
Lower uterine segment caesarean section
Operative delivery of a baby through an incision in the lower uterine segment
Classical caesarean section
Operative delivery of a baby through a vertical incision in the upper segment of the uterus
Hysterotomy
Operative delivery of a baby through a uterine incision at less than 20 weeks gestation
Preterm labour
Labour at less than 37 weeks gestation
Prelabour rupture of membranes (PROM)
Rupture of membranes before onset of labour
Premature prelabour rupture of membranes (PPROM)
Rupture of the membranes before labour at less than 37 weeks gestation
ARM/AROM
Artificial rupture of membranes
SROM
Spontaneous rupture of membranes
Braxton Hicks contractions
Painless uterine contractions in the antenatal period
Naegele’s rule
To estimate the probable date of confinement
Add 9 months and 7 days to the first day of the last menstrual period
(Correction for cycle length (if not 28 days))
First stage of labour
From start of labour until full dilatation of the cervix
Second stage of labour
From full dilatation of the cervix until birth of the baby
Third stage of labour
From birth of the baby until delivery of the placenta and membranes
Spurious or false labour
Uterine contractions which may be regular and/or painful, but are not associated with cervical effacement and dilatation
Oxytocic
Medication that stimulates contractions of uterine muscle
Tocolytic
Medication to stop uterine contractions
Induction of labour
Process of causing labour to commence
Cord prolapse
The cord is alongside or below the presenting part in the presence of ruptured membranes
Episiotomy
Surgical incision of the perineum during the second stage of labour
Third degree tear
Perineal trauma which involves the vaginal mucosa, perineal muscles and external anal sphincter
Second degree tear
Perineal trauma which involves the vaginal mucosa and perineal muscles
Lochia
Vaginal discharge during the puerperium
Oligohydramnios
Reduced amniotic fluid
Polyhydramnios
Excess amniotic fluid
Pre-eclampsia
Hypertension and proteinuria in pregnancy
Eclampsia
Seizure in the clinical setting of pre-eclampsia
Amniocentesis
Sampling of amniotic fluid using a needle through the abdominal wall of the woman
Chorionic villus sampling (CVS)
Sampling of the placenta using a needle under ultrasound guidance
External cephalic version
Turning a breech baby to cephalic presentation through the maternal abdominal wall
Retained placenta
Placenta still in utero 1 hour after delivery of the baby
Precipitate labour
Labour less than 4 hours duration
Shoulder dystocia
Difficulty delivering the shoulders after delivery of the fetal head
Puerperium
The 6 weeks following delivery
Quickening
Maternal perception of fetal movements
Restitution
Rotation of the fetal head after delivery to align with the back and shoulders
Show
A discharge of blood and mucus from the vagina in early labour or the days preceding labour
Phototherapy
Use of standard fluorescent white light or blue light therapy to photoisomerise bilirubin to allow for its excretion
Exchange transfusion
Procedure to treat severe newborn pathological jaundice in which blood is removed and replaced with donor blood. This removes the bilirubin and also the antibodies that have been causing haemolysis and jaundice
Low birthweight
<2500 gm
Very low birthweight
<1500 gm
Neonatal respiratory distress
Tachypnoea, increased effort of breathing, noisy breathing and central cyanosis
Caesarean hysterectomy
Laparotomy at which the contents of the gravid uterus are delivered, then the uterus is excised (e.g. due to placenta accreta)
Perimortem CS
Caesarean performed on a moribund or dead woman with a view to preserving her life
Augmentation of labour
The process of stimulating a labour that has already started
Placenta praevia
Placenta that approaches or covers the internal cervical os in late second or third trimester
Vasa praevia
Fetal vessels lying in the membranes in front of the presenting part
Antepartum haemorrhage
Bleeding >5ml from the vagina after 20 weeks gestation
Abruption
Separation of the placenta from the uterus in the antenatal or intrapartum period
Post partum haemorrhage
Vaginal bleeding of more than 500 ml in the first 24 hours after delivery
Secondary post partum haemorrhage
Vaginal bleeding of more than 500 ml more than 24 hours after delivery
Placenta accreta
Placenta that invades the myometrium
Uterine atony
Abnormal relaxation of the uterus after delivery, usually causing bleeding
Isoimmunisation
Blood group antibodies cross the placenta resulting in haemolysis of fetal red blood cells. Antibodies include D, c, K (Kell), Kidd, Duffy etc.
CTG
Cardiotocograph
Neonatal death
A liveborn infant who dies within 28 days of birth, of at least 20 weeks gestation or weighing >400gm if gestation is unknown
Stillbirth
An infant born after 20 weeks gestation (or birthweight over 400gm if gestation is unknown) who did not show any signs of life after birth
Perinatal mortality rate
The number of stillbirths plus neonatal deaths per 1000 births
Maternal death
The death of a woman while pregnant (irrespective of the gestation) or within 42 days of the conclusion of the pregnancy irrespective of the cause of death or gestation at delivery
Maternal mortality rate
Number of maternal deaths per 100,000 live births
Infant death
Death of an infant between 29 days and 1 year of life
Station
The level of descent of the presenting part relative to the pelvic brim or symphysis on abdominal palpation, or to the ischial spines on vaginal examination
Lie
The relationship between the long axis of the fetus and the long axis of the uterus e.g. longitudinal, oblique, transverse
Position
The relationship of a defined area on the presenting part (the ‘denominator’) to the mother’s pelvis. In a cephalic presentation, the denominator is the occiput, thus the fetal position is described as occipito-anterior (OA), occipito-posterior (OP), left or right occipito-transverse (L/ROT). In a breech presentation, the denominator is the sacrum (SA, SP, ST)
Presentation
The part of the fetus which is presenting eg vertex, breech
Asyncitism
Side to side tilt of the fetal head
Caput
Oedema from obstructed venous return in the fetal scalp caused by pressure of the head against the cervix
Cervical incompetence
Painless cervical dilatation in the second trimester causing preterm labour