Complex Care Exam Flashcards
What are the 4 types of malpresentation?
- Face
- Brow
- Breech
- Shoulder
What is the definition of the lie?
The relationship of the long axis of the fetus to the long axis of the uterus.
It can be longitudinal, transverse or oblique
What is the definition of the presentation?
The part of the fetus which enters the brim of the pelvis first and occupies the lower pole of the uterus.
It can be vertex, face, brow, breech or shoulder.
What is the definition of the position?
The relationship of the denominator to the 6 areas of the pelvic brim.
It can be ROA, ROP, ROL, LOA, LOP or LOL
How is the engagement of the head measured?
Measured by the amount of fetal skull (in fifths) palpated abdominally above the pelvic brim.
What is the definition of malposition of the occiput?
When the occiput occupies the posterior quadrant of the maternal pelvis
If the occiput is in the posterior quadrant of the pelvis, what is the:
- Presenting part
- Denominator
- Attitude
- Presenting diameter
- Presenting part : vertex
- Denominator : occiput
- Attitude : deflexed
- Presenting diameter : occipitofrontal 11.5cm
List 4 possible causes of malposition of the occiput
- Type of pelvis
- Flat sacrum
- Large or small fetus
- Anteriorally situated placenta
On inspection of the abdomen, what can suggest malposition of the occiput?
Saucer dip below umbilicus
Loss of fetal curvature - curve of back cannot be seen
On palpation of the abdomen, what can suggest malposition of the occiput?
Limbs will be easily palpable and back unable to be palpated
Head may be high and free
On auscultation of the fetal heart, what can suggest malposition of the occiput?
The FH can be heard midline under the umbilicus or in the flanks
What 4 signs during labour would suggest malposition of the occiput?
- Early SRM, prior to the onset of regular contractions
- Presenting part is high and held up at brim
- Presenting part is not well applied to the cervix
- On VE the anterior fontanelle is felt anteriorally
What 3 things will affect the outcome of an OP position?
- Shape of pelvis
- Size of fetal head
- Strength of uterine contractions
What are the 3 possible outcomes of an OP position?
- Long internal rotation
- Short internal rotation
- Deep transverse arrest
Describe a long internal rotation from an OP position
Occurs with good uterine contractions
The occiput rotates 3/8ths of a circle to an OA position and birth continues normally
Describe a short internal rotation from an OP position
Occurs when there is insufficient flexion of the head
Head rotates 1/8th of a circle and sinciput becomes the leading part
Baby is born face to pubes
Describe a deep transverse arrest
Head remains deflexed
Occipitofrontal diameter is caught above the ischial spines
During VE, diagnosed when able to palpate both fontanelles and saggital suture in transverse diameter
How should a deep transverse arrest be managed?
Using Kiellands forceps to rotate to OA position
List 10 possible effects that OP position might have on labour
- Prolonged latent phase
- Slow descent of fetal head
- Poorly effaced cervix causes incoordinate uterine action
- Early SRM - risk of infection and cord prolapse
- Severe backache
- Difficulty in micturition
- Dehydration and exhaustion - maternal ketoacidosis
- Fetal distress
- Operative intervention
- Maternal tissue trauma
List 7 points to consider in the care of a woman in labour whose baby is lying in the OP position
- Change positions, keep mobile, birthing pool
- Heat pads, massage, acupressure
- Hydration
- Pain relief
- Bladder care
- Documentation
- Position for second stage
List 3 maternal and 2 neonatal points to consider in the postnatal care following an OP delivery
Maternal
- Pain relief for perineum
- Observe for infection
- Education on caring for perineum and hygiene
Neonatal
- Observe for caput, cephalhaematoma and note type of moulding
- Observe for signs of intracranial injury
Describe a face presentation
Face is directly over the internal os
The attitude of the head is complete extension
Occiput is in contact with the spine
When does primary face presentation develop?
Before the onset of labour
When does secondary face presentation develop?
After the onset of labour
List 2 potential causes of primary face presentation
- Anencephaly (absence of a large part of brain, skull and scalp)
- Fetal goitre (an enlargement of the thyroid gland in utero)
List 6 possible causes of secondary face presentation
- Deflexed OP position
- Contracted pelvis
- Lax uterus
- Polyhydramnios
- Multiple pregnancy
- Prematurity
What is the denominator of a face presentation?
The mentum (chin)
List 7 points in the management of a mento-anterior face presentation
- Notify obstetrician
- Check for cord prolapse once membranes have ruptured
- Monitor fetal and maternal wellbeing
- When face appears at vulva, hold back sinciput to allow chin to free
- Episiotomy and forceps may be necessary
- Monitor baby following delivery - facial bruising etc
- Reassurance for parents
Is vaginal delivery possible with a mento-posterior presentation?
No
What types of presentation can brow presentations convert to?
- Face presentation by becoming fully extended
- Vertex presentation following flexion
What type of delivery will be required if a brow presentation persists?
Caesarean section
Describe a shoulder presentation
The long axis of the fetus lies across the long access of the uterus
List 7 pre-disposing causes of shoulder presentation
- Multiparity
- Lax abdominal and uterine contractions
- Placenta praevia
- Fibroids
- Polyhydramnios
- Prematurity
- Multiple pregnancy
On inspection of the abdomen, what would suggest a shoulder presentation?
Low fundus and wide uterus
On palpation of the abdomen, what would suggest shoulder presentation?
No fetal pole felt in fundus or pelvis and fetal head felt in left or right iliac fossa
During a VE, what would suggest a shoulder presentation?
Presenting part would be high and ill fitting
Scapula or ribs may be felt
What 2 options are available for shoulder presentation?
- Early cephalic version
- Caesarean section
List 4 possible complications of a shoulder presentation
- Prolapsed cord
- Prolapsed arm
- Caesarean section
- Obstructed labour/ruptured uterus
List 3 factors in pregnancy that significantly increases the risk for women with thrombophilia
- Increase in hypercoagulability
- Decreased venous return secondary to the compression of the pelvic veins
- Reduced vessel tone with venous pooling
What is thrombophilia?
Disorders of the haemostat if system that result in an increased risk of thrombosis
What prophylactic treatments should be given to women with thrombophilia?
Low molecular weight heparin, aspirin, TED stockings
Where do 85% of deep vein thrombosis occur in pregnant women and why?
In the left leg due to compression of the left iliac vein by the right iliac artery as they cross
List 6 possible symptoms of a DVT
- Pain in area of clot
- Unilateral and occasionally bilateral swelling
- Redness or discolouration
- Difficulty weight bearing on affected leg
- Low grade pyrexia
- Lower abdominal pain if the pelvic veins are affected
List 6 pieces of advice for pregnant women to reduce the risk of DVT
- Keep hydrated
- Remain as active as possible
- Avoid standing for long periods
- Elevate feet when sitting
- Leg care (massage gently with oil or cream)
- Avoid unnecessary long journeys by car, train or plane
What are the 3 possible side effects of heparin?
- Osteoporosis
- HIT (heparin induced thrombocytopenia) - low platelet count
- Cutaneous allergy
For labour, when and why should women stop their LMWH injections?
At the start of contractions.
This facilitates the use of an epidural and decreases the risk of PPH
Is breastfeeding safe for women on heparin or warfarin?
Yes
When should LMWH be restarted following delivery?
4 hours after removal of epidural catheter
OR
2 hours after vaginal delivery with no epidural
When does the coagulation status return to pre-pregnancy levels?
6 weeks postpartum
List 3 typical symptoms of a pulmonary embolism
- Severe sudden onset of shortness of breath
- Sharp chest pain which is worse on inspiration
- Cough with blood
List 5 possible complications of a pulmonary embolism
- Cardiac arrest or sudden death
- Heart failure or shock
- Severe breathing difficulty
- Arrythmias
- Pleural effusion
What type of third stage management is recommended for women with thrombo-embolic disorders?
Active management
How many times more likely is a venous thromboembolism to occur in pregnancy?
10 times
At what stage of pregnancy and birth is a woman most likely to develop a VTE?
Puerperium
List 10 pre-existing risk factors for a VE in pregnancy
- Previous VTE
- Thrombophilia
- Age over 35
- BMI over 30
- Parity greater than 2
- Smoking
- Medical co-morbidities
- IV drug user
- Gross varicose veins
- Paraplegia
List 6 obstetric risk factors known to increase the risk of VTE
- Emergency c-section
- Instrumental delivery
- Pre-eclampsia
- Prolonged labour
- Blood loss of more than a litre
- Blood transfusion
What can be recommended to women during labour to reduce the risk of VTE and promote natural childbirth?
Mobilisation and avoidance of lithotomy
Describe a monozygotic pregnancy
Identical twins
Develop from one egg and one sperm
Will be the same sex and same genes
Can be different sizes
Describe a dizygotic pregnancy
Unidentical twins
Develop from two eggs and two sperm
Will be no more alike than normal brothers and sisters
Describe a dichorionic pregnancy
Two placentae
Two chorions
Two amnions
Twins can be mono or dizygotic
Describe a monochorionic pregnancy
One placenta
One chorion
Two amnions
Twins can only be monozygotic
What is the average gestation of a multiple pregnancy?
37 weeks
List 4 effects that a multiple pregnancy can have on the pregnancy
- Exacerbation of common disorders such as sickness, nausea and heartburn
- Iron and folic acid deficiency anaemia
- Polyhydramnios
- Pressure symptoms such as impaired venous return, backache and indigestion
Which antenatal screening test is not recommended in a multiple pregnancy?
Chorionic villus sampling
Why should monozygotic twins have an ECG at approximately 24 weeks?
There is a higher risk of cardiac abnormalities
Why are monochorionic pregnancies scanned every 2 weeks from diagnosis?
To check growth and signs of twin-to-twin transfusion syndrome
From what gestation and then how often should dichorionic pregnancies be scanned?
From 20 weeks they should be scanned every 4 weeks
At what gestation is a multiple pregnancy usually induced?
38 weeks
Who should be informed and when, when a multiple pregnancy lady is in labour?
Neonatal unit should be advised when the woman is in established labour.
Paediatric team should be summoned when the birth is imminent
Describe the management of the birth of a twin pregnancy
- If first twin is vertex presentation, birth can proceed same as singleton pregnancy
- Following the birth of the first twin, baby and cord should be immediately labelled “twin 1”
- Twin 1 can be put to the breast for feeding and to help stimulate further contractions
- The abdomen should then be palpated to determine the lie, presentation and position of twin 2
- If longitudinal, VE to confirm presentation. If not, ECV can be attempted
- Fundal pressure can be used to engage the head
- Birth of twin 2 should ideally be complete within 45 minutes of twin 1 delivery but can be longer if no signs of fetal distress
- Oxytocic drugs given at delivery of anterior shoulder of twin 2
- Baby and cord labelled “twin 2”
- Once oxytocics working, controlled cord traction to both cords simultaneously
What postnatal advice should be given to new parents of twins or triplets?
They should be encouraged to treat each baby as an individual and spend time interacting with each separately to aid development of speech and social skills.
They may bond with one baby more quickly which is normal so reassurance should be given.
Encouragement of the father to be involved in the care and suggest extra help for the first few days
List 11 complications associated with multiple pregnancies
- Polyhydramnios
- Twin-to-twin transfusion syndrome
- Fetal abnormality
- Conjoined twins
- Malpresentations
- PROM
- Cord prolapse
- Prolonged labour
- Locked twins
- Premature expulsion of placenta
- Postpartum haemorrhage
What is the definition of shoulder dystocia and what happens?
Failure of the shoulders to traverse the pelvis spontaneously after birth of the head.
The anterior shoulder becomes trapped behind the symphysis pubis while the posterior shoulder may be in the hollow of the sacrum or high above the sacral promontory
List 9 antenatal risk factors of shoulder dystocia
- Previous birth with shoulder dystocia
- Previous macrosomic fetus
- Maternal birthweight greater than 4000g
- Diabetes and gestational diabetes
- Obesity greater than 90kg
- Post-dates
- Pelvic abnormality
- Advanced maternal age
- Higher parity
List 6 intrapartum risk factors for shoulder dystocia
- Oxytocin augmentation
- Prolonged labour
- Prolonged second stage
- Macrosomia
- Arrest or failure of descent
- Need for assisted delivery
List 2 warning signs of shoulder dystocia
- “Turtle-necking”
- Failure of restitution and descent of shoulders
What 3 things are the various manoeuvres to assist shoulder dystocia, designed to do?
- Increase functional size of the pelvis
- Decrease bisacromial diameter
- Change relationship between bisacromial diameter and pelvis
What are the 8 important things that should be documented during a shoulder dystocia?
- Time of delivery of the head
- Time appropriate assistance was called
- Who arrived and when
- Which manoeuvres were tried, when, by who and for how long
- Episiotomy
- Number of times traction was tried
- Time of delivery of shoulders
- Apgar score