title: Accuracy of the ankle-brachial index using the SCVL(®), an arm and ankle automated device with synchronized cuffs, in a population with increased cardiovascular risk.
abstract: OBJECTIVE
  To evaluate the accuracy of the ankle brachial index (ABI) measured with the SCVL(®) ("screening cardiovascular lab"; GenNov, Paris, France), an automated device with synchronized arm and ankle cuffs with an automatic ABI calculation.
  
  
  METHODS
  Patients were consecutively included in a cardiovascular prevention unit if they presented with at least two cardiovascular risk factors. ABI measurements were made using the SCVL, following a synchronized assessment of brachial and ankle systolic pressure. These values were compared to the ABI obtained with the usual Doppler-assisted method.
  
  
  RESULTS
  We included 157 patients. Mean age was 59.1 years, 56.8% had hypertension, 22.3% had diabetes mellitus, and 17.6% were current smokers. An abnormal ABI was observed in 17.2% with the SCVL and in 16.2% with the Doppler. The prevalence rates of an abnormal ABI by patient measured with each device, ie, 15.7% (confidence interval [CI] 0.95: [11.8; 20.4]) or 14.3% (CI 0.95: [10.7; 18.9]), did not differ. The coefficient of variation of Doppler and SCVL measures was 15.8% and 15.1%, respectively. The regression line between the two measurement methods was statistically significant. The value-to-value comparison also shows a difference of mean equal to 0.010 (CI 0.95: [-0.272; 0.291]) (r = -0.055). Reproducibility of ABI measurements with the SCVL showed a difference of mean equal to 0.009 (CI 0.95: [-0.203; 0.222]), without heteroscedasticity (r = -0.003).
  
  
  CONCLUSIONS
  The SCVL is a fast and easy to use automated oscillometric device for the determination of ABI. The use of this two-synchronized-cuff device correlates well with the gold standard Doppler ultrasound method and is reproducible. The SCVL may ease the screening for peripheral arterial disease in routine medical practice.
authors.affiliation: Unité de Prévention Cardiovasculaire, Service d'Endocrinologie-Métabolisme, Assistance Publique/Hôpitaux de Paris, Groupe Hospitalier Pitié-Salpêtrière - Université Pierre et Marie Curie.
authors.forename: David
authors.initials: D
authors.lastname: Rosenbaum
authors.forename: Sandra
authors.initials: S
authors.lastname: Rodriguez-Carranza
authors.forename: Patrick
authors.initials: P
authors.lastname: Laroche
authors.forename: Eric
authors.initials: E
authors.lastname: Bruckert
authors.forename: Philippe
authors.initials: P
authors.lastname: Giral
authors.forename: Xavier
authors.initials: X
authors.lastname: Girerd
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D055109:Ankle Brachial Index / Q000295:instrumentation*; D001331:Automation; D002318:Cardiovascular Diseases / Q000453:epidemiology* / Q000503:physiopathology; D004867:Equipment Design; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D008422:Materials Testing; D008875:Middle Aged; D010297:Paris; D058729:Peripheral Arterial Disease / Q000175:diagnosis* / Q000453:epidemiology / Q000503:physiopathology; D011237:Predictive Value of Tests; D015995:Prevalence; D015203:Reproducibility of Results; D018570:Risk Assessment; D012307:Risk Factors; D019722:Sphygmomanometers; D018608:Ultrasonography, Doppler / Q000295:instrumentation