What are the diameters of fetal skull?
What are the diameters of fetal skull?
At its widest part, the fetal skull is (on average) 9.5 cm wide. This is 3.5 cm less than the widest diameter of the pelvic inlet, and 1.5 cm less than the widest diameter of the pelvic outlet.
What are the diameters of female pelvis?
Diameters
| Name | Description | Average measurement in female |
|---|---|---|
| Anatomical conjugate | Extends from the pubic symphysis to the promontory; | about 120 mm. |
| Diagonal conjugate | Extends from lower margin of the pubic symphysis to the sacral promontory; | about 130 mm. |
What are the diameters of the pelvis?
History
| Measurement | From | Length |
|---|---|---|
| Transverse diameter (of inlet) | Between extreme lateral points of pelvic inlet | 13.5-14 cm |
| Oblique diameter I | Right sacroiliac joint | 12-12.5 cm |
| Oblique diameter II | Left sacroiliac joint | 11.5-12 cm |
| Anatomical conjugate | Pubic symphysis | ~12 cm |
What are the three pelvic diameters?
[1] The dimensions of its anteroposterior, oblique, and transverse diameters vary according to the morphological type of the pelvis.
What part of the skull is weakest?
pterion
Clinical significance The pterion is known as the weakest part of the skull. The anterior division of the middle meningeal artery runs underneath the pterion. Consequently, a traumatic blow to the pterion may rupture the middle meningeal artery causing an epidural haematoma.
Which is the highest diameter of female pelvis?
Gynaecoid pelvis(50%): It is the normal female type. Inlet is slightly transverse oval. Sacrum is wide with average concavity and inclination….
- between the farthest two points on the iliopectineal lines.
- It lies 4 cm anterior to the promontory and 7 cm behind the symphysis.
- It is the largest diameter in the pelvis.
What is the other name of bregma?
Development. The bregma is known as the anterior fontanelle during infancy.
What is lambda in skull?
The lambda is the midline bony landmark where the lambdoid sutures and sagittal suture meet, between the occipital and two parietal bones. It may be a depression and therefore palpable. Accessory occiptal bones are common near the lambda, usually associated with the lambdoid sutures.
What is the weakest part of the female body?
Women are weak in the small muscles of the feet, the calf muscles and the stabilisers of the feet and the direct support muscles of the arch of the foot, the tibialis posterior muscle, which mean they develop shin splints when starting a running program.
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