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ABNORMAL
PELVIS
MBBS 2020
KGMU
ABUNASAR AZIZ
ABHINAV CHAURASIA
CONTENT
Different Abnormal Pelvis
​Contracted Pelvis
Cephalopelvic Dysproportion
DIFFERENT DIAMETER OF PELVIS
3
AP DIAMETER
INLET 11 cm
CAVITY 12 cm
OUTLET 13 cm
TRANSVERSE
13 cm
12 cm
11 cm
OBLIQUE
12 cm
12 cm
12 cm
DIFFERENT ABNORMAL PELVIS
 CONTRACTED PELVIS
 RACHITIC PELVIS
 OSTEOMALACIC PELVIS
 NAEGELE PELVIS
 ROBERT’S PELVIS
Presentation title 4
CONTRACTED PELVIS-
INLET CAVITY
CONTRACTION CONTRACTION
↓ ↓
If obstetric conjugate Interspinous diameter
˂ 10cm ˂ 8cm
If transverse diameter
˂ 12cm
Mild- OC ˂ 10 cm
Moderate- OC 7.5 to 9.5cm
Severe- OC ˂ 7.5cm
Management- LSCS(lower segment caesarean
If any of the major diameter of pelvis is shortened by 0.5cm or
more.
OUTLET
CONTRACTION
↓
Intertuberous
diameter ˂ 8cm
5
2. Rachitic Pelvis
- in rickets
- Shortening of inlets and widening of transverse diameter
3. Osteomalacic Pelvis
- Promontry is pushed downwards and forwards and the lateral pelvic
wall pushed inward.
- The shape of inlet becomes triradiate.
4. Naegele Pelvis- one ala of sacrum is absent
5. Robert’s Pelvis- both ala of sacrum is absent
6
CONTINUE
7
RACHITIC PELVIS OSTEOMALACIC PELVIS NAEGELE”S PELVIS
CEPHALOPELVIC DYSPROPORTION
• Fetus is too big or Pelvis is small for a particular pregnancy
• CPD can occur at level of pelvic inlet, mid pelvis or pelvic outlet
• Assessment- 1) Abdominal method
2) Muller-Munro-Kerr method
1. Abdominal method
Semirecumbent (45°)
Head grasped by left hand
Index, middle finger of Rt hand over PS
Head pushed downward and backward
Presentation title 8
2. Abdomino-vaginal method
(Muller - Munro - Kerr)-
Lt hand pushes head into pelvis
Rt. Index, middle fingers at level of IS
to note descent
Thumb placed over PS to note
overlapping
9
THANK YOU

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Abnormal pelvis.pptx

  • 2. CONTENT Different Abnormal Pelvis ​Contracted Pelvis Cephalopelvic Dysproportion
  • 3. DIFFERENT DIAMETER OF PELVIS 3 AP DIAMETER INLET 11 cm CAVITY 12 cm OUTLET 13 cm TRANSVERSE 13 cm 12 cm 11 cm OBLIQUE 12 cm 12 cm 12 cm
  • 4. DIFFERENT ABNORMAL PELVIS  CONTRACTED PELVIS  RACHITIC PELVIS  OSTEOMALACIC PELVIS  NAEGELE PELVIS  ROBERT’S PELVIS Presentation title 4
  • 5. CONTRACTED PELVIS- INLET CAVITY CONTRACTION CONTRACTION ↓ ↓ If obstetric conjugate Interspinous diameter ˂ 10cm ˂ 8cm If transverse diameter ˂ 12cm Mild- OC ˂ 10 cm Moderate- OC 7.5 to 9.5cm Severe- OC ˂ 7.5cm Management- LSCS(lower segment caesarean If any of the major diameter of pelvis is shortened by 0.5cm or more. OUTLET CONTRACTION ↓ Intertuberous diameter ˂ 8cm 5
  • 6. 2. Rachitic Pelvis - in rickets - Shortening of inlets and widening of transverse diameter 3. Osteomalacic Pelvis - Promontry is pushed downwards and forwards and the lateral pelvic wall pushed inward. - The shape of inlet becomes triradiate. 4. Naegele Pelvis- one ala of sacrum is absent 5. Robert’s Pelvis- both ala of sacrum is absent 6
  • 7. CONTINUE 7 RACHITIC PELVIS OSTEOMALACIC PELVIS NAEGELE”S PELVIS
  • 8. CEPHALOPELVIC DYSPROPORTION • Fetus is too big or Pelvis is small for a particular pregnancy • CPD can occur at level of pelvic inlet, mid pelvis or pelvic outlet • Assessment- 1) Abdominal method 2) Muller-Munro-Kerr method 1. Abdominal method Semirecumbent (45°) Head grasped by left hand Index, middle finger of Rt hand over PS Head pushed downward and backward Presentation title 8
  • 9. 2. Abdomino-vaginal method (Muller - Munro - Kerr)- Lt hand pushes head into pelvis Rt. Index, middle fingers at level of IS to note descent Thumb placed over PS to note overlapping 9