Dys dystocia Second part: abnormalities of birth canal
Dystocia Second part: abnormalities of birth canal
Pelvic contraction Birth canal bony canal Soit cana abnormal bony canal: pelvic contraction any contraction of the pelvic diameters that diminishes the capacity of the pelvis can creat dystocia during labor
Pelvic contraction Birth canal – bony canal – soft canal abnormal bony canal: pelvic contraction – any contraction of the pelvic diameters that diminishes the capacity of the pelvis can creat dystocia during labor
Classification Contraction of the pelvic inlet contraction of the midpelvis and pelvic outlet general contraction of the pelvis pelvic deformities
Classification Contraction of the pelvic inlet contraction of the midpelvis and pelvic outlet general contraction of the pelvis pelvic deformities
Contracted pelvic inlet Anteroposterior d<lOcm diagonal conjugate d<1l.5cm external conjugate d<l 8cm simple flat pelvIs rickets flat pelvis
Contracted pelvic inlet Anteroposterior d<10cm diagonal conjugate d<11.5cm external conjugate d<18cm – simple flat pelvis – rickets flat pelvis
Contracted midpelvis Midpelvis: from inferior margin of the symphysis pubis through the ischial spines touches the sacrum near the junction of the 4th and 5th vertebrae contraction: interischial spinous diameter is smaller than &cm(spines are prominent, the pelvic Side walls converge or the sacrosciatic notch is narrow)
Contracted midpelvis Midpelvis: from inferior margin of the symphysis pubis through the ischial spines,touches the sacrum near the junction of the 4th and 5th vertebrae contraction: interischial spinous diameter is smaller than 8cm(spines are prominent, the pelvic side walls converge or the sacrosciatic notch is narrow)