| 摘要 |
<p>PURPOSE: To eliminate a fluctuation of pump characteristic and a main tube's dependence on its instability by comparing a measured pulse width with the pre-determined pulse width threshold and by indicating the on-use cuff size in terms of the pulse width measured. CONSTITUTION: The sphygmomanometer for newborn babies starts the pump- pouring operation via the pump 1 for making a positive pressure before identifying the cuff, whose ON/OFF valve 2 is kept opened for a short period. Either the pressure or the acoustic pulse reaching the pressure detector 12 via the cuff 8 or bypassing it, and the controller calculates the pulse width based on the signal transmitted from the pressure detector 12. Every threshold value for the pulse widths or sections are kept set into the controller 16 that compare the measured pulse width with the threshold value to identify a larger or smaller cuff, according to the finding which side the measured width falls, below or above the threshold value. If the measured width exceeds the threshold value, the controller identifies it as a smaller cuff to operate the system required for the smaller cuff 8. This avoids the defects of the main tube and the fluctuation problem of the pump characteristic.</p> |
