Ultrasonographic evaluation of the state of the hip joints in newborns

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Abstract

Two hundred fifty newborns (110 girls and 140 boys) were examined with ultrasonography. The method of acetabular index measurement was used to assess the hip joint status. High efficacy of sonography in differentiation of true and false-positive Marks-Ortholani symptom was noted. High correlation between sonography data and radiography ones was detected. Absence of irradiation, possibility of examination in real time and repeated examinations make sonography one of the main methods for hip joint screening.

About the authors

H. A. Eskin

Central Research Institute of Traumatology and Orthopedics. N.N. Priorova

Email: info@eco-vector.com
Russian Federation, Moscow

L. K. Mikhaylova

Central Research Institute of Traumatology and Orthopedics. N.N. Priorova

Author for correspondence.
Email: info@eco-vector.com
Russian Federation, Moscow

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Supplementary files

Supplementary Files
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1. JATS XML
2. Fig. 1. The correct position of the child on the side during sonography of the hip joint: the shoulder and back are parallel, the thigh is bent at an angle of 30-60° and is fixed by an assistant (parents).

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3. Fig. 2. Positions of the ultrasonic sensor: a — examination without fixation of the child's lower back by hand, b — with fixation of the lower back, shoulder and hip flexion at an angle of 30-60°.

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4. Fig. 3. Longitudinal ultrasonogram of a normal hip joint of a newborn. 1 - ilium; 2 - bone protrusion of the roof; 3 - the bottom of the depression; 4 - lateral joint capsule; 5 - femur (for other designations, see text).

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5. Fig. 4. Longitudinal ultrasonogram of a normal hip joint in a 4-month-old child. There is a nucleus of ossification of the femoral head (arrow). AI, acetabular index; LP — Perkins line (for other designations, see the text).

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6. Fig. 5. Scheme for measuring distance p and acetabular index (AI) on radiographs. LP - Perkins line.

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7. Fig. 6. Longitudinal ultrasonograms of a 2-month-old child with hip dysplasia (arrows indicate the contours of the femoral head; other designations are the same as in Fig. 3). a — in the neutral position of the limb, the femoral head is subluxated to the lateral side; b - when the limb is abducted, the head returns to the acetabulum.

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8. Fig. 7. Ultrasonograms (a, b) and X-ray (c) of the hip joints of a patient of the 3rd group. a — at birth, the head of the right femur is not completely covered by the acetabular roof; b — by 5 months, the head of the right femur is subluxed to the lateral side (the arrow shows the center of ossification); c — subluxation confirmed radiographically.

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