Method for identifying dicrotic notch point in arterial tension signal
A technology of dicrotic notch and identification method, which is applied in vascular assessment, cardiac catheterization, etc., and can solve problems such as low efficiency, heavy manual identification workload, and difficulty in ensuring accuracy.
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[0107] In this embodiment, arterial pressure signals are collected by an arterial pressure detector (VP-2000, Kelin Company, Japan), and these signals are input into a computer for low-pass filtering and sampling preprocessing. The filter adopts a second-order Butterworth low-pass filter, the cutoff frequency is 25Hz, and the sampling frequency is 250Hz, so as to obtain an arterial pressure signal to be measured, whose waveform is as follows figure 2 shown. Utilize the method of the present invention, adopt computer to carry out dicrotic notch point recognition to this arterial pressure signal to be measured, the dicrotic notch point recognition process is carried out according to the following steps:
[0108] A) build template database; This step specifically comprises:
[0109] a1) The arterial pressure detector collects multiple known arterial pressure signals (period, amplitude, location of dicrotic notch point and other parameters are known) with different period...
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