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Diagnostic values of the femoral pulse palpation test
Fatine Khammari Nystrom1, Gunnar Petersson1, Olof Stephansson1,2
1Department of Medicine Solna, Clinical Epidemiology Unit, Karolinska Institutet, Stockholm, Sweden.
Objectives:
To calculate diagnostic values of the femoral pulse palpation to detect coarctation of the aorta or other left-sided obstructive heart anomalies in newborn infants.
Design:
Population-based cohort study.
Setting:
Stockholm-Gotland County 2008-2012.
Patients:
All singleton live-born infants without chromosomal trisomies, at ≥35 gestational weeks, followed-up until 1-2 years of age.
Main Outcome Measures:
Diagnostic values and ORs for the femoral pulse test and subsequent diagnosis of coarctation of the aorta or left-sided obstructive heart malformation.
Results:
Among the 118 592 included infants, 432 had weak or absent femoral pulses at the newborn examination. Seventy-eight infants were diagnosed with coarcation of the aorta and 48 with other left-sided obstructive heart malformations. The diagnostic values for the femoral pulse palpation test to detect coarctation of the aorta were: sensitivity: 19.2%, specificity: 99.6, positive predictive value: 3.5% and negative predictive value: 99.9%. For left-sided heart malformations: sensitivity: 8.3%, specificity: 99.6%, positive predictive value: 0.9% and negative predictive value: 100%. Sensitivity for coarctation of the aorta increased from 16.7% when examined at <12 hours of age to 30.0% at ≥96 hours of age.
Conclusions:
The femoral pulse test to detect coarctation of the aorta and left-sided heart malformations has limited sensitivity, whereas specificity is high. As many infants with life-threatening cardiac malformations leave the maternity ward undiagnosed, further efforts are necessary to improve the diagnostic yield of the routine newborn examination.
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