From an experienced clinician, those techniques must be learnt by practical instruction.
Well-fed, relaxed, warm, and lain on a firm surface should be given to the infant. The knees and hips are flexed to ninety degree with one examining hand to each leg. What is more, on the inner side of the baby’s knee should be the thumb. Behind the greater trochanter is the ring and little fingers. Gentle but firm pressure is required in the line of the femur in order to a lax hip would be dislocated posteriorly.
Next, the thighs are abducted fully with a light motion, and lifting the greater trochanter forwards at the same time. This motion is more like opening a surgical peel pack rather than like opening a book. It is the movement which has to be got.
Once a hip is lax, the reduction which happens when the legs are abducted will be felt as a jumping sensation. Lots of normal hips crack and only experience can give the distinction between clicks and clunks.
The pelvis with one hand with the thumb over the pubic symphysis, and the fingers of the same hand behind the buttocks, a varies of this test is to steady. Next, with the other hand holding the examined leg as before, try to rock forwards in and out of the socket and the head of the femur backwards. This test must be applied in various degrees of abduction till the lax arc is checked. Any doubt about a hip should result in referral to an arthopaedic surgeon with paediatric experience.
Between three and six months of the age is the best time for those children, whose hip has been suspect should be X-rayed. In addition, babies at high risk of hip instability can have ultrasound examination to check matters.