Antepartum Haemorrhage Flashcards
What is antepartum haemorrhage?
It is defined as external bleeding from the genital tract of a pregnancy woman after 22 weeks gestation
What is bleeding before 22 weeks classified as?
It is a threatened or inevitable miscarriage
What does the bleeding entail?
Usually fresh blood or clots or soaking of a pad
Why must we be worried if a woman presents with antepartum haemorrhage?
- It is a medical emergency
2. Transfer the mother to the nearest hospital with ultrasound, blood transfusion and c-section facilities
What are the 4 major causes of antepartum haemorhhage?
- Abruptio placentae
- Placenta praevia (including vasa praevia
- Antepartum Haemmorhage from local lesions including cancer of the cervix
- Antepartum haemorrhage of unknown origin
What is the management of antepartum haemorhhage?
- the first thing we need to do is resuscitate the patient
- the second thing is to find the diagnosis
How do we resuscitate the patient?
- Make sure you check vital signs: blood pressure and heart rate ands assess colour off mucous membranes
- Give an infusion of ringers lactate
- If there’s heavy bleeding insert two large bore(16G) intravenous cannulae , do a blood transfusion and prepare to do a C-section if necessary
How do we get to the diagnosis of a patient with antepartum haemorrhage?
- Start with history-previous pregnancies, previous antepartum haemorrhages, current pregnancy, abdominal pain, discharge, fetal movements, recent external or genital injuries
- Then examine-vital signs, abdominal exam, type of vaginal bleeding, vaginal speculum exam
- Special investigations
What special investigations would you do in as patient with antepartum haemorrhage?
- Hb or haematocrit
- Ultrasound(to look at fetal size and placental position)
- Resus blood group
- Clotting time
- Cardiotocogrtaphy from 24 weeks
Why would we not do a vaginal examination in a patient with antepartum haemorrhage?
-this is because we still need to exclude placenta praevia as a cause for the bleeding
The examining fingers may dislodge the placenta from the uterine decides and cause life-threatening haemmorhage
What is abruptio placenta?
It is when there is premature separation of the normally situated placenta
This separation causes haemorhhage from the deciduous basalis with bleeding between the placenta and the uterine wall
How does abruptio placentae usually present?
It presents with vaginal bleeding but can also cause a retroplacental haemmorhage and clot with no external bleeding
What percentage of pregnancies experience abruptio placentae?
0,5-2% and causes fetal death in 25-30% of cases
What is the grading system for abruptio placenta?
- Mild
2. Severe
What is mild abruptio placenta?
The mom shows no signs of haemodynamic instability and the baby is still alive
What is severe abruptio placenta?
The fetus has died or the mother is shocked
What are the causes /risk factors of abruptio placenta?
- Pre-eclampsia
- Cigarette smoking
- Cocaine
- Blunt abdominal trauma to the mother
- Pre-labour rupture of the membranes
- Chorioamnionitis
- Previous abruptio placentae
What are the causes of antepartum haemorrhage?
- Abruptio placentae
- Placenta praevia
- Vasa praevia
- Deciduous bleeding
- Ruptured uterus
- Cancer of the cervix
- Other local lesions
- APH of unknown cause
What are the symptoms of early abruptio placentae?
- Tender uterus
- Irritable uterus
- Decreased fetal movement
- Pain between uterine contractions
- Uterine or lower abdominal pain
- Small or no antepartuma haemmorhage
How does a severe abruptio placenta present?
The uterus is usually hard and tender and is large for gestational age because of the accumulation of blood
What can we expect on ultrasound of the patient in abruptio placenta?
- Blood- mixed clot, serum and fresh blood between the placenta and uterine wall
- We can see if the fetus is alive or not-
What do we measure on the ultrasound?
The bi-parietal diamter, femur length and abdominal circumference to allow estimation of mass and viability
What size fetus is not viable in public hospitals?
1 kilogram (28 weeks)
What bloods would you order for a patient with abruptio placentae?
- Hb and haematocrit for potential transfusion
- Clotting profiles and platelet counts
- Urea and creatinine-renal function