Vasten's symptom is the ratio of the head of the child to the pelvis of a woman. It is determined by the location of the head relative to the symphysis. A manual determination is made. If the child’s head sticks out and is above the symphysis, then delivery is not possible in a natural way.
Method of determining
Obstetricians determine Vasten's symptom using simple techniques.
- The woman lies on the couch and straightens her legs.
- The doctor places a hand with straightened fingers on the pubis and begins to slide it up to the stomach.
If the obstetrician stumbles on a raised edge (the child’s head), which protrudes above the edge of the symphysis, this means that the head is not inserted into the pelvis. In this case, the woman in labor put a positive symptom of Vasten.
If the edge of the palm slides off the edge of the symphysis (above), this means that the child's head can enter the pelvis, and it is located below the symphysis. In this case, the woman in labor put a negative symptom of Vasten.
If the edge of the palm moves unhindered, being in the same plane, then this means that there is a sign of Vastena "flush." In this case, the difference between the pelvis of a woman and the head of a child is very small.
This is determined as indicated in the photograph.
Causes of occurrence
A sign of Vasten can provoke the following reasons:
- large fruit;
- hydrocephalus;
- asynclitic inserts (high and straight rifle-shaped seam);
- weak labor activity;
- the fetus in the pelvic presentation;
- fetus in transverse presentation;
- childbirth after 41 weeks;
- myoma;
- scars on the uterus and vagina.
Types of childbirth and the degree of the syndrome
Depending on the degree, childbirth can be natural, using cesarean section and natural with notches of the edge of the birth canal.
- 1 degree. It is considered the simplest in which you can give birth in a natural way.
- 2 degree. It is considered complicated, in which only a premature baby can be born naturally. If the baby is full-term, then cutting the edge of the birth canal or cesarean section is used. It depends on the size of the fetus and the width of the pelvis. The decision is made individually.
- 3 degree. It is considered difficult, in which it is impossible to give birth even to a premature baby in a natural way. Obstetricians perform a caesarean section.
- 4 degree. It is considered the most difficult in which natural birth is impossible.
If a woman has a narrow pelvis, then with a fetal weight of more than 3 kg 600 g, only a caesarean section is performed.
If Vasten's syndrome was detected in a woman in labor, then it is necessary to listen to the advice of doctors that relate to childbirth. When a woman is asked to undergo a caesarean section, this means that the risk of injuries to the mother and baby during natural birth is too great.
Possible injuries
When a woman has a narrow pelvis or a large fetus, and childbirth takes place in a natural way, that is, there are risks of injury to the child and mother.
These include:
- child oxygen starvation (hypoxia);
- dislocations and fractures;
- neck curvature;
- infection of the child and mother;
- hemorrhage in the brain or under the periosteum;
- cephalohematomas;
- death.
Sometimes there is an early outflow of amniotic fluid due to the high presence of the fetal head. During the passage of water from the uterus, part of the umbilical cord or limb may exit. When the baby begins to walk along the birth canal, the umbilical cord is pressed and makes it difficult for him. If you squeeze it, asphyxiation will occur, which can cause severe harm and even lead to death. It is also possible infection of the fetus and woman in childbirth.
A narrow pelvis can deform the head and delay the process of childbirth. Due to long fights and attempts, the woman will weaken, and the baby may be stuck. In this case, hypoxia occurs.
If the birth is delayed, and the fetus is in the birth canal for too long, then this can lead to circulatory disorders, which, in turn, will provoke the appearance of fistulas.
When childbirth is prolonged, blood flow in the uterus and placenta is possible. This can cause asphyxiation, which will cause a brain hemorrhage.
Such injuries can greatly affect the health of the baby in the future.
Genkel-Vasten symptom is determined at 30–33 weeks of pregnancy, and every month before birth, control is brought. If the symptom is caused by the incorrect position of the fetus in the uterus, then it is likely that when it rolls over, natural birth will become possible.