title: Neonatal hip instability: results and experiences from ten years of screening with the anterior-dynamic ultrasound method.
abstract: OBJECTIVE
  To record the results and experiences from a 10-y screening period with the anterior-dynamic ultrasound method for detecting neonatal hip instability.
  
  
  METHODS
  An ultrasonographic improvement of the Palmén/Barlow test was used. The screening programme included 22,047 newborns. Decisions about treatment were made solely on the ultrasound result.
  
  
  RESULTS
  It was found that 175 infants (7.9/1000) had at least one unstable hip--dislocated or dislocatable. Dislocated hips were found in 1.1/1000. Dislocatable hips were found in 6.8/1000 but only 1.1/1000 needed treatment. The total frequency of treatment was 2.2/1000. All cases but one were diagnosed before discharge from the maternity ward. The rate of surgery was 0.1/1000 newborns. Girls were more affected than boys, by a ratio of 3:1. Among the affected hips 64.4% were a left hip.
  
  
  CONCLUSIONS
  Neonatal hip instability is always present at birth and can be diagnosed immediately after birth. We have no indications that instability can appear at a later stage. The anterior-dynamic ultrasound screening programme is an efficient tool to diagnose neonatal hip instability and to decide when to begin treatment.
authors.affiliation: Department of Paediatrics, Blekingesjukhuset, Karlskrona, Sweden. john.andersson@blf.net
authors.forename: J E
authors.initials: JE
authors.lastname: Andersson
mesh_terms: D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007593:Joint Instability / Q000000981:diagnostic imaging* / Q000628:therapy; D008297:Male; D015997:Neonatal Screening / Q000379:methods*; D017063:Outcome Assessment, Health Care; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D013997:Time Factors; D014463:Ultrasonography