MATERNAL PELVIS
MATERNAL PELVIS
* Total Bones-04 (Innominate-02, Sacrum-01, Coccyx-01)
Single Innominate Bone Consist of 3 Bone - Ileum, Ischium & Pubis
* Types of Pelvis
1. Gynecoid 50%- Rounded shape (1" Most common in female)
2. Android 20%- Heart Shape (Most common in male)
3. Anthropoid 25%- Long Ovale shape (2nd Most common in female)
4. Platypelloid 5%- Kidney shape (Vaginal Delivery not possible
* Parts of true pelvis
1. Inlet/ brim- bounded rounded shape
2. Cavity/ greatest pelvic dimesion- circular shape
3. Outlet/least pelvic pelvic dimesion- long ovale
* Abnormalities of pelvis
1. congenital
A. Negel's Pelvis- one sacral ala absent
B. Roberts kotch- Both sacral ala absent
C. Kyphotic pelvis- pelvis is funnel shape
2. Acquired abnormalities
A. Osteomalasic-deficiency of calcium
B. Ricketic-deficiency of Vitamin D
* Diameters of pelvic inlet
The True Conjugate = 11 cm
The Obstet. Conjugate = 10.5cm
The Diagonal Conjugate = 12 cm
* Pelvic diameter -
Fetal Skull
➤Total bones-23
➤ Cranium bones-09 (Frontal Bone is extra)
► Facial Bone- 14
Parts of fetal skull-04
1. Face
2. Brow/ sinciput
3. Vertex
4. Occiput
Fontanels
Total - 06
Total clinical present- 02
A. Anterior (bregma)- diamond shape, closed at 18 month
B. Posterior (lambda)- reverse triangular shape, closed at 6-8 weeks
Sutures-05
1. Frontal- Between Both Frontal Bone
2. Coronal- Between Frontal & Parietal Bone
3. Sagital Between Both Parietal Bone
4. Lamboidal - Between Parietal & Occipital Bone
5. Sequomus - Between Temporal & Parical Bone
❖ Diameters- Antero-posterior & Transverse
1. Antero-posterior
a. Suboccipito- Bregmatic-9.5 Cm (Smallest)
b. Suboccipito- Frontal- 10.5 Cm
C.Occipito- Frontal - 11.5 Cm
d. Submento- Bregmatic- 10 Cm
e. Submento Vetical- 11.5 Cm
f. Mento- Vertical -13-14 Cm (Longest)
2.Transverse diameter
Me -bi-Mastoid- 7.5 Cm
Tum - bi-Temporal- 8 Cm
Se - supra-Subparietal- 8.5 Cm
Pyar - bi- Parietal -8.5 To 9.5 Cm (Approx 9.5cm)
Karti
