title: Doppler ultrasound compared with strain gauge for measurement of systolic ankle blood pressure.
abstract: This study assesses measurement variation in the measurement of ankle systolic blood pressure (ABP) when measured with Doppler ultrasound and with the strain gauge method. Ninety-seven patients were included. ABP was measured with Doppler ultrasound and with the strain gauge method. The methods were compared graphically by scatterplots and analyzed by paired t test, analysis of variance, and Pitman's paired variance ratio test. ABP was measured by strain gauge in all extremities, whereas no Doppler signal was obtainable in 7 limbs (4%). There was no systematic difference in measurements between the means of the two measurements. However, a substantial difference of more than 25 mm Hg was found in 15% of limbs and more than 20 mm Hg in 20%. In the majority of patients, measurements of ABP by Doppler ultrasound and the strain gauge method give similar results, but for a minority the discrepancy is substantial.
authors.affiliation: Vascular Surgery Department, Rigshospitalet, Copenhagen, Denmark. stoevrin@tiscali.dk
authors.forename: J B
authors.initials: JB
authors.lastname: Joensen
authors.forename: S
authors.initials: S
authors.lastname: Juul
authors.forename: J
authors.initials: J
authors.lastname: Abrahamsen
authors.forename: E W
authors.initials: EW
authors.lastname: Henneberg
authors.forename: Jes S
authors.initials: JS
authors.lastname: Lindholt
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000842:Ankle / Q000098:blood supply*; D001794:Blood Pressure; D001795:Blood Pressure Determination / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010991:Plethysmography; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D013599:Systole; D018608:Ultrasonography, Doppler