Role of ultrasound in developmental dysplasia of the infants hip (DDH) joint very informative and valuable before 6 months infants age.
1) '' Ultrasound screening had a sensitivity of 88.5% (95% confidence interval 84.1% to 92.1%), specificity of 96.7% (96.4% to 97.4%), a positive predictive value of 61.6% and a negative predictive value of 99.4%. ''
Woolacott NF, Puhan MA, Steurer J, Kleijnen J. Ultrasonography in screening for developmental dysplasia of the hip in newborns: systematic review. BMJ. 2005 Jun 18;330(7505):1413. Epub 2005 Jun 1.
2) See also
Shorter D, Hong T, Osborn DA. Cochrane Review: Screening programmes for developmental dysplasia of the hip in newborn infants. Evid Based Child Health. 2013 Jan;8(1):11-54. doi: 10.1002/ebch.1891.
some other potential useful references:
Screening in Developmental Dysplasia of the Hip (DDH).
Paton RW.
Surgeon. 2017 Oct;15(5):290-296. doi: 10.1016/j.surge.2017.05.002
How to use… Hip examination and ultrasound in newborns.
Collins-Sawaragi YC, Jain K.
Arch Dis Child Educ Pract Ed. 2018 Feb;103(1):34-40
Screening with ultrasound increases curative rates of DDH because it is more sensitive than clinical examination alone. Late DDH is very rare if both ultrasound and clinical examination were normal.
High sensitivity and specificity both in screening for DDH and in clinically suspected cases of DDH . The real time nature of examination helps to identify dislocatable hip as well as the frankly dislocated hip . Useful to identify reduction during treatment with harness and to confirm stabiity before weaning from the harness . Use limited to early infancy and efficacy reduces after ossification of femoral head . Another limitation is that it is operator dependant
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