Fontanelle beating

Introduction The top of the baby's head has a soft, sometimes beating, medically known as the cardia. There are two main types of sputum at birth: one is called static sputum, and the front part of the head is composed of the upper anterior horn of the parietal bone and the frontal bone. The slant diameter at birth is 2.5 cm, usually closed at 1 to 1.5 years old. The other is called posterior malleolus, which is composed of the parietal bone and the occipital bone. At the back of the head, it is usually small or closed at birth, and closed at 2 to 4 months at the latest.

Cause

The beating of the cardia is that the baby's cardia is not closed. The posterior malleolus is usually closed within three months after birth, and the anterior hernia is closed approximately 1 to 1.5 years after birth. Since there is no hard skull cover at the cardia, care should be taken to prevent damage to the brain. Under normal circumstances, your baby's voice is flat or slightly sunken. It is usually caused by the following conditions: The biggest reason is the lack of water in the body. If the body fluid is lost after diarrhea or vomiting, the water is not replenished in time. . In addition, if the baby uses a large dose of dehydrating agent, it will also cause the front door to sag due to dehydration. In addition, malnourished, thin baby, their front door often shows a depression.

an examination

Related inspection

Brain ultrasonography, brain MRI, intracranial pressure monitoring, skull size, brain CT examination

At the age of one, the front door has been closed a lot, and by the age of one and a half, 95% of the childrens front door has been completely closed. Tuen Mun Beat Examination: B-mode ultrasound brain examination, brain CT examination.

B-mode ultrasound craniocerebral examination: mainly used for children under 2 years of age who are not closed, through the Tuen Mun as a "sound window" for scanning.

Head CT is a convenient, rapid, safe, painless, non-invasive new examination method that clearly shows the anatomical relationship of different cross sections of the brain and the specific brain tissue structure. Therefore, the detection rate of the lesion and the accuracy of the diagnosis are greatly improved.

Differential diagnosis

Differential diagnosis of cardia jumping:

1, some children can not touch the front, before the age of one is completely closed, more common in the head deformity.

2, the child before the sputum closure late, to the age of one and a half has not been completely closed, and the gap is still large, the teeth grow very slow, more common in rickets; In addition, hydrocephalus, stagnation and growth of infants can also be seen The front door is closed late. Therefore, children who have a late closure of the sacral door should check with a pediatric hospital.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.