Summary: (Hbm3106) Reproductive And Developmental Biology
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5 Modern Obstetrics
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What are the 4 aspects of foetal health that modern obstetrics allow doctors to monitor?
Foetal heart rate, urine, blood acidity, oxygen and uterine contractions of the mother -
What are the 3 groups that modern obstetric tests fall into?
Foetal heart rate monitoring
ultrasound foetal heart rate monitoring
Foetal blood sampling -
Foetal Heart Rate Monitoring encompasses 2 monitoring techniques. What are they called and what are their subgroups if they have any?
Auscultation
Cardiotocography (CTG) → External EFM & Internal EFM -
What are the names of the 4 Ultrasound based Foetal heart rate monitoring techniques?
Biophysical profile
Foetal growth assessment
Vascular doppler studies
Amniotic fluid volume -
How do you conduct auscultation fetal heart rate monitoring and by which gestational stage is it common practice to routinely do an auscultation?
Place a doppler transducer on the abdominal wall of the mother to pick up the sound of the fetus heart
From 20 weeks -
Which specific 5 instances in time does the doctor want to record with the doppler transducer when conducting an auscultation?
60s during contraction
30s after contraction
15-30 mins in the 1st ½ of labour
5 mins in the 2nd ½ of labour -
Cardiotocography (CTG) picks up the baby heart rate response to what event?
Uterine contractions, to see how the baby's heart responds to the physical stress of each contraction -
What are the components to an internal and external EFM CTG’s and how are they conducted?
Components to aninternal EFM =electrodes &internal pressure catheter Internal EFM process =records FHR viaECG fromfoetal scalp electrodes ,Internal pressure catheter indicatesstrength ofcontractions +timing Components to an external EFM = ultrasound transducer & pressure sensitive toco transducer
External EFM process = ultrasound transducer placed on maternal abdomen measures baby heart rate, tocotransducer placed on the fundus picks up timing of uterine contractions not strength -
When is it suitable to do internal and external EFM CTG’s and what is the special condition for internal EFM and why?
External and Internal = ante-natally & in labour
But for internal the cervix has to be dilated > than 2-3cm and membranes have to be erupted because electrodes will be placed on baby's head -
In what two instances (one setup and one unfortunate) can CTG give off wrong results
Electrodes placed on cervix
Baby has died
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