4.1 Variations In Fetal Presentation And Position Flashcards
1
Q
Pelvis diameters
A
2
Q
fetal skull diameters
A
3
Q
fetal skull diameters in cm
A
4
Q
Occipito-frontal
A
11.5cm
5
Q
Suboccipito-frontal
A
10cm
6
Q
Submento-bregmatic
A
9.5cm
7
Q
Suboccipito-bregmatic
A
9.5 cm
8
Q
Mento-vertical
A
14cm
9
Q
Malpresentation of fetus
A
Malpresentation of the fetus refers to the presentation of any fetal part at the pelvic inlet that is NOT vertex.
Variations to presentation include:
face,
brow,
breech,
shoulder (with an oblique lie).
10
Q
ROP
A
11
Q
Face and brow presentation
A
Face and brow presentation is a malpresentation during labor when the presenting part is either the face or, in the case of brow presentation, it is the area between the orbital ridge and the anterior fontanelle.
12
Q
Face presentation
A
- fetal head is fully extended
almost at a right angle to the spine - palpation on VE - chin rather than brow
*
13
Q
Causes of a primary face or brow presentation
A
- Fetal anomalies
- ie major CNS abnormalities
- anencephaly
- Iniencephaly
- Meningomyselocoele
- fetal head conditions cause permanent extension of the fetal head
- cervical spine deformities
- goitre
- cystic hygroma
- brachial cysts
- Prematurity
- excessive tone in the extensor muscles of the fetus
- Multiparity
- Idiopathic
14
Q
Face presentations
A
15
Q
Brow presentation
A
13.5 cm
