| 摘要 |
<p>The blood pressure measuring system preferably uses a two-chamber sleeve. In a connecting passage with low flow resistance between the two chambers is a flow-sensitive converter, whose upper frequency limit allows conversion of flow modulation in the Korotkoff Tone frequency range. The converter output signal has electronically selected from it according to amplitude, phase, frequency, relative time, and absolute time duration those portions caused by the patient and attributable to heartbeats, opening and closing of arteries, and alteration of the volume of the part of the body below the sleeve on occurrence of the Korotkoff Tones. These signal portions are selected and compared for sorting into true blood pressure signals and unusable ones, which are re-processed to stop signal emission and emit a fault signal. Electronic equipment selects typical fault surge signals occuring for pulse duration, amplitude and group number and emits a gating signal.</p> |
