Advantage of monitoring skin vibration as an index of arteriovenous fistular blood flow.
Monitoring of the skin vibration is disturbed little by environmental noise. Therefore, the skin vibration is more relevant than bruit on the skin by means of monitoring the fistular blood flow. Frequency analysis of the skin vibration generated by an internal arteriovenous fistula indicated two peaks of power spectral density (PSD), one in the frequency range of 4-10 Hz and the other from 100-300 Hz. The analysis of the skin vibration generated by an external fistula, however, showed only one peak in the range of 4-10 Hz and a moderate flat PSD level in the range of 100-300 Hz. The PSD level in the range of 100-300 Hz decreased dramatically or disappeared when the fistular blood flow diminshed or ceased. Therefore, the optimal frequency for monitoring skin vibration may be the range of 100-300 Hz.
Aoki
T
T
Nagoya Municipal Industrial Research Institute, Branch Hospital, Nagoya University School of Medicine, Japan.
Shinzato
T
T
Itani
H
H
Kato
T
T
Miwa
M
M
Nakai
S
S
Maeda
K
K
D001164:Arteriovenous Fistula / Q000503:physiopathology*; D005542:Forearm; D006801:Humans; D009622:Noise; D012039:Regional Blood Flow / Q000502:physiology; D012879:Skin Physiological Phenomena; D013927:Thrombosis / Q000175:diagnosis / Q000503:physiopathology; D014732:Vibration