/ / Hip joint, ultrasound: norm in newborns

Hip joint, ultrasound: norm in newborns

Parents are fervent about newborn babies. Any medical appointments cause them a lot of questions. When the doctor directs the baby to check the hip joint, ultrasound seems to be something dangerous and undesirable. However, ultrasound examination does not have a negative effect on the baby's body. This technique is harmless. Parents should understand that the doctor is called upon to protect their child from serious problems, so his appointments must be carried out. What can alert the doctor and why should she have an ultrasound of the hip joint in the baby?

coxofemoral joint of ultrasound

Indications for ultrasound examination

Children can come into the world with a dysplasia of oneor both hip joints. According to statistics, this problem is manifested in 15% of newborns. The first signs of attentive parents notice themselves. Usually they are alarmed by one of the following signs:

  • one leg of the baby looks shorter than the other;
  • when bathing or dressing, it is difficult for the toddler to fully bend the legs, the movement is limited;
  • when one or both hips are withdrawn, clicks are heard in the joint;
  • folds on the legs and buttocks are asymmetrical;
  • the muscles of the legs are in hypertonia.

However, if the parents did not notice these abnormalities, then the doctor will see them necessarily. He will test mobility and examine the hip joint. Ultrasound will be the best option for clarifying the diagnosis.

Ultrasound of the hip joints of newborns

Risk group

All babies in 1 and 3 months passcompulsory medical examination by specialists. However, there is a risk group for hip dysplasia. Particular attention is required for premature babies born at 7-8 months of pregnancy, and children whose mothers had a similar anomaly. In addition, the risk group includes children from multiple pregnancies and those born with pelvic presentation. Ultrasound of the hip joints of newborns from this group can be considered obligatory. Since the earlier the pathology is detected, the greater the chance of completely correcting the situation. Dysplasia of newborns can be cured completely, and in the future the child will not feel any discomfort.

What is dysplasia?

Dysplasia is called an innate disease, which is characterized by underdevelopment or incorrect formation of the hip joint. Medicine distinguishes 3 degrees of the disease:

  • I - pre-development of an underdeveloped hip joint without visible changes in the position of the femoral head in relation to the articular cavity.
  • ІІ - a subluxation, that is, the hip bone is partially shifted relative to the joint depression.
  • ІІІ - dislocation, that is, the head of the hip bone is completely shifted or left from the deepening of the hip joint.

Preparation of the baby for ultrasound

How should parents act if the monthlythe baby needs to examine the hip joint? Ultrasound will be performed in the supine position on the side. The baby during the examination should be calm and motionless. The main task of parents is to ensure a comfortable state of the child so that he can safely transfer the examination.

To babe was calm, he should be full andhealthy. On the day of the examination, it should not be disturbed by colic. 30 minutes before the procedure, the newborn should be fed. If this is done earlier, the baby can get hungry, and if later, then regurgitate during the procedure.

Ultrasound of the hip joint in infants

How is ultrasound performed?

Ultrasound of the hip joint in children - the procedure is safe. It does not result in irradiation of a small patient. The investigations are carried out by a linear scanning sensor.

The kid is placed on a hard top, on his side,The legs should be tightened in the hips at an angle of 30 °. In the field of research, a hypoallergenic gel is applied to the skin. The sensor is located above the large spit. For clarity of the image, it is shifted to the necessary side. To reveal the decentralization of the joint head, the hips are pulled to the stomach and rotated. After having examined one hip joint, ultrasound is repeated on the other side.

The results of the examination are recorded on thermal paper. After visual examination, the specialist conducts interpretation of the indicators.


There are angular rates with whichproduce a transcript of the survey results. For this, 4 lines are drawn on the ultrasound picture: basic, acetabular, inclinational, convective.

Ultrasound of hip joints norm

Further, angular values ​​are measured and dysplastic changes are evaluated according to the classification list:

  • Normal, that is, a full hip joint, is designated as type 1A.
  • The transient form of dysplasia, i.e. short with an extended limbus, but without displacements from the center, is designated as type 1B.
  • The joint with developmental delay, at which the cartilaginous part of the roof is expanded over the depression, is designated as type 2.
  • Joint with delayed formation (for children younger than 3 months) - as type 2A.
  • Joint with delayed maturation at the age of over 3 months - type 2B.
  • The changes with minor decentralization are designated as type 2B.
  • The joint with a delay in development and a flattened roof of the cavity is designated as type 3.
  • Underdevelopment of the joint without structural changes is designated as type 3A.
  • Underdevelopment with structural rearrangement of cartilage is type 3B.
  • Severe underdevelopment with the exit of the head from the joint cavity - type 4.

After decoding the ultrasound of the hip jointsthe rate of development or pathology is described and transmitted to the treating physician. However, if the examination was conducted by a medical professional without appropriate qualification, the sensor could be located at the wrong places. This means that the result will be incorrect.

Are there any contraindications for babies?

Nervous about the appointmentparents should not. Ultrasound of the hip joints of newborns, whose age is 1 month, has no contraindications. Starting from 2 months, the ossification of the head of the hip bone can become a contraindication. In this case, starting from the age of three months, an x-ray of the hip joints can be prescribed.

Ultrasound of the hip joint in children

In some cases, the love of children takesstrange character. Parents are afraid that orthopedic constructions (stirrups, struts) cause inconvenience to the baby, and remove them. They think that they have pitied the little man, but the consequence of such "pity" may be disability. The child with age will begin to experience pain, his legs will have different lengths. In time, an operation to replace the joint may be necessary. Is this what the "compassionate" parents wanted for their treasure?

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