Factors affecting the accuracy of volume-oscillometric blood pressure measurement during partial pressurization of the wrist.
We compared the volume-oscillometric responses of the airbag pressure sensor and the contact force sensor across and along the radial artery on the wrist during partial pressurization by an airbag. Because of the anatomic structure and non-uniform pressurization pressure distribution, elongated and shifted oscillometric pressure waveform envelope variations are observed. For the contact force sensors directly above the radial artery, S-shaped pressurization curves can be seen possibly due to temporal softening of the radial artery stiffness at near zero transmural pressure. These differences in the shape of oscillometric envelope as well as pressurization curve may be the leading factors for inaccuracies of volume-oscillometric blood pressure measurement by partial pressurization method using an airbag.
Kim
Jong Pal
JP
Samsung Advanced Institute of Technology, Korea. jongpalk@samsung.com
Kim
Youn Ho
YH
Bae
Sangkon
S
Kim
Seok Chan
SC
Shin
Kunsoo
K
D001794:Blood Pressure / Q000502:physiology*; D001795:Blood Pressure Determination / Q000295:instrumentation* / Q000379:methods*; D015924:Blood Pressure Monitors; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D009991:Oscillometry / Q000295:instrumentation* / Q000379:methods*; D011312:Pressure; D017534:Radial Artery / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity