Lecture on the mechanism of laying the crown of the left-first...

2021-03-21 12:00 AM

The cusp, the previous left-sided occipital position, is found in mothers with a normal pelvis, firm abdominal wall (giving birth less), the genitals are not deformed, and the fetus, amniotic fluid, and vegetables are also normal.

Define

The fetus is the part of the fetus presenting to the upper waist of the mother's pelvis.

The landmark in the crown is the occipital bone (posterior). The inner diameter of the throne in the lower occipital - anterior tapering 9.5 cm.

Mother's pelvis is 01 tube-shaped with 3 waists: upper waist, middle waist and lower waist.

The most important diameter of the upper waist is the front and back diameter (protrusion - defender), the normal protrusion - defender ³10.5 cm.

The fetus passes through the mother's pelvis from the upper waist to the middle waist to the lower waist out during childbirth according to a certain mechanism called the delivery mechanism.

The crown of the crown must go through 3 phases: birth, body and buttock.

Each stage consists of 4 stages: fall, down, spin, book.

The left anterior pelvic occipital cusp is the most common and convenient type of labor for a labor.

The anterior pelvic occipital pattern is found in 65% of all fertility parietals, while the apical crown accounts for 95% of all-natural births.

The cusp, the previous left-sided occipital position, is found in mothers with a normal pelvis, firm abdominal wall (giving birth less), the genitals are not deformed, and the fetus, amniotic fluid, and vegetables are also normal.

Piecing the crown of the parietal apical position anterior to the left is also through 3 phases: head birth, shoulder laying and buttock laying and also includes 4 tenses: fall, down, spin, book for each stage.

Headed

Including 4 tenses.

Drop

Prepare to fall: good bow, overlap, create serous tumor.

Official drop: The throne crosses the left diagonal diameter of the upper waist, diagnosed with leap by the sign Farabeuf. There are two types of passes: symmetrical (uncommon) and asymmetric either before or after, but the latter is more common.

Down

The fetus is down.

Inside the sub-frame from the upper waist to the middle waist to the lower waist.

Spinning

When the throne touches the pot diaphragm will rotate 450 counter-clockwise to the saturation to prepare the book.

Book

Along with the mother's tension, the fetus will be carried out under the effect of uterine contractions. There are two ways to book: the book of polynomial or occipital type.

Shoulder

Since the shoulder is perpendicular to the head, the shoulder will fit the diagonal right diagonal of the upper waist, which also includes 4 tenses:

Drop

Getting ready: Shoulders shrink from 12cm in diameter to 9cm in diameter.

Formal Slip: Shoulder circumference passing right diagonal of upper waist.

Down

Shoulders go down in the lap from the upper waist to the middle waist to down to the lower waist.

Spinning

The shoulder rotates at 45 0 clockwise to get the front and back diameter of the lower waist to prepare for the taper.

Book

The shoulders move out of the vulva under the effect of uterine contractions and squeezing the mother and in some cases with the help of the midwife.

Butt splits

In general, after 4, it is like giving birth and giving birth, but because the buttocks are small, after the head and shoulders are closed, the buttocks will drop out quickly.

Diagnosis of the anterior left anterior occipital apical crown is generally not difficult, with careful physical examination and, if necessary, an ultrasound or x-ray.

Management must always remember the principle of obeying the laws of nature, the more intervention it is, the more complications for the mother and the child, sometimes leading to trauma and even death for the fetus and mother.