the birth canal dr. radu alexandru pintilie. - the bony pelvis - the birth canal
TRANSCRIPT
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THE BIRTH THE BIRTH CANALCANAL
Dr. Radu Alexandru PintilieDr. Radu Alexandru Pintilie
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- the bony pelvis -- the bony pelvis -
THE BIRTH CANALTHE BIRTH CANAL
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The true pelvis is an obliqualy truncated, bent cylinder
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The pelvis forms a bony ring through which the body weight is transmitted to the lower extremities
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Sacrospinous ligament
Sacrotuberous ligament
Sacroiliac syncondroses
Symphisys pubis
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Sacrospinous ligament
Sacrotuberous ligament
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1=11 cm 2=12.5 cm 3=13.5 cm 5=12-12.5 cm
5
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1 2
3 4
1 - gynaecoid
2 - android
3 - platypelloid
4 - anthropoid
PELVIC TYPES
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True conjugate
Obstetrical conjugate ˃10 cm
Diagonal conjugate – 12 cm
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11.5 cm
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9 cm
11 cm
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1 – first plane of Hodge2 – the descending cilinder( Pigeaud )3 – the releasing triangle ( Fochier )
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The base of Trillat triangle
The romb of Michaelis
PELVIMETRY
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PELVIMETRY
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PELVIMETRY
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THE BIRTH CANAL
-soft tissues of the pelvis-
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-fetus as a passenger--fetus as a passenger-
FETUS AT TERMFETUS AT TERM
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The sacro-femural diameter (9 cm)
The sacro-pretibial diameter (12 cm) The
bitrohanterian diameter (9-10 cm)