Congenital Talipes Equinovarus (CTEV) is one
of the most common congenital limb deformities. We reviewed the records
of infants who had received treatment for structural CTEV between
1 January 2007 and 30 November 2012. This was cross-referenced with
the prenatal scans of mothers over a corresponding period of time.
We investigated the sensitivity, specificity, and positive and negative
predictive values of the fetal anomaly scan for the detection of CTEV
and explored whether the publication of Fetal Anomaly Screening
Programme guidelines in 2010 affected the rate of detection. During the study period there were 95 532 prenatal scans and
34 373 live births at our hospital. A total of 37 fetuses with findings
suggestive of CTEV were included in the study, of whom 30 were found
to have structural CTEV at birth. The sensitivity of screening for
CTEV was 71.4% and the positive predictive value was 81.1%. The negative
predictive value and specificity were more than 99.5%. There was
no significant difference between the rates of detection before
and after publication of the guidelines (p = 0.5). We conclude that a prenatal fetal anomaly ultrasound screening
diagnosis of CTEV has a good positive predictive value enabling
prenatal counselling. The change in screening guidance has not affected
the proportion of missed cases. This information will aid counselling
parents about the effectiveness and accuracy of prenatal ultrasound
in diagnosing CTEV. Cite this article:
Congenital Talipes Equinovarus (CTEV) has been excluded from the standards set by the NHS fetal anomaly screening programme (NHS FASP) for the 18+0–20+6 week fetal ultrasound scan (USS). Whilst adhering to NHS FASP guidelines, the antenatal ultrasound department at our centre performs “incidental screening” for CTEV; parents are informed if CTEV is noted incidentally during the scan and referral made to the fetal medicine department. Our aim was to investigate the effectiveness of incidental antenatal screening for structural CTEV. The database of the antenatal ultrasound department was interrogated for all suspected cases of CTEV on the 18+0–20+6 week USS, between August 2006 and June 2012. Terminations, stillbirths and outside referrals were excluded. Our Ponseti-service database was searched to identify all patients treated for structural CTEV between January 2007 and November 2012. Cases were excluded if the mother did not receive antenatal-care at our centre. Results from the two searches were cross-referenced, and statistical analysis performed.Aim
Method
