Patent ID: 9265480
Filing Date: 2016-02-23
CPC Classification: A61B

Claim Text:
1. A cerebrovascular analyzer, comprising: a bio-signal measurement system including a bio-signal measuring sensor unit that comprises an electrocardiogram (ECG) sensor, a phonocardiogram (PCG) sensor, an accelerated plethysmogram (APG) sensor and an ultrasonic sensor, and a bio-signal reception and process unit that is connected to each of the sensors of the bio-signal measuring sensor unit for receiving and processing bio-signals measured by the sensors; and an analysis indicator calculation system including a main processing unit that is connected to the bio-signal reception and process unit for communicating and calculating biodynamic indicators of a cerebrovascular system from the bio-signals, an input unit that is connected to the main processing unit for receiving control commands of a user, and an output unit that is connected to the main processing unit for displaying the calculated results, wherein the APG sensor is a cuff pulse wave sensor, a carotid artery pulse wave sensor or a femoral artery pulse wave sensor; wherein the bio-signal measurement system is configured to obtain an ECG waveform, a PCG waveform and an APG waveform synchronously by the bio-signal measuring sensor unit; wherein the main processing unit is programmed to calculate the biodynamic indicators from basic data including a cerebrovascular pressure curve synthesized with the bio-signals of the bio-signal measurement system, a systolic area and a diastolic area of the cerebrovascular pressure curve and a cerebrovascular blood flow volume; wherein the main processing unit is programmed to carry out the steps of: (1) receiving basic information data from the input unit and receiving the bio-signals from the bio-signal measurement system; (2) analyzing waveforms from the bio-signals and obtaining the cerebrovascular pressure curve, the systolic area and the diastolic area of the cerebrovascular pressure curve and the cerebrovascular blood flow volume from the waveforms; and (3) calculating the biodynamic indicators from the cerebrovascular pressure curve, the areas of the cerebrovascular pressure curve, the cerebrovascular blood flow volume and the basic information data and displaying the results of cerebrovascular analysis; wherein the cerebrovascular system comprises a left posterior cerebral artery and a right posterior cerebral artery; and wherein step 3 further comprises calculating compliances C the compliance of the left posterior cerebral artery is the compliance of the right posterior cerebral artery is the resistance of the left posterior cerebral artery is and the resistance of the right posterior cerebral artery is where P