Apparatus for assessing risk of cerebrovascular diseases

摘要

The apparatus for assessing the risk of cerebrovascular diseases comprises a sensor part 1, a circuit part 2, a computation part 3 and an output part 4, where the circuit part 2 is a functional part for driving the sensor part 1 and transmitting a signal detected at the sensor part 1 to the computation part 3 and comprises a transmission circuit 21, a first receiving circuit 22, a second receiving circuit 23 and the like. The transmission circuit 21 is in connection with a transmission device 111 and a transmission device 121, for driving these devices to generate a continuous wave. A rate wave form computation part 31 is in connection with the first receiving circuit 22 and the second receiving circuit 23 to obtain the frequency of the reflected continuous wave as detected with the receiving units 112 and 122. Comparing the frequency with the frequency from the transmission circuit 21, the variation of the frequency is detected. Based on these values, blood flow rate “v” can be determined. In such manner, an apparatus for assessing the risk of cerebrovascular diseases with fewer burdens to persons to be examined and with simple measurement units can be provided.

主权项

1. An apparatus for assessing risk of cerebrovascular disease, comprising:
a blood flow rate-measuring part for measuring flow rate value of blood circulating in a vascular tube of skin of a human subject from outside thereof by transmitting a continuous ultrasonic wave to blood flow, receiving one or more signals reflected from the blood flow and determining one or more variations in frequency between the transmitted continuous ultrasonic wave and the received one or more signals to determine the flow rate of blood, a blood pressure acquiring part for acquiring a blood pressure value of the vascular tube, a risk computation part of cerebrovascular diseases for assessing the risk of cerebrovascular diseases, using a maximal blood pressure value acquired at the blood pressure-acquiring part and using one or plural maximal blood flow rate values among blood flow rate values variable over time measured at the blood flow-rate measuring part, wherein the risk computation part assesses the risk by determining a value for blood flow rate per unit pressure as a ratio of the one or plural maximal blood flow rate values and the maximal blood pressure value, wherein the risk computation part assesses the risk of cerebrovascular diseases at a number of grades of deep subcortical white matter hypersensitivity based on a correlation between grades of deep subcortical white matter hypersensitivity and blood flow rates per unit pressure using results obtained by prior head magnetic resonance imaging (MRI) examinations of human subjects other than the human subject; and an output part including a display apparatus to display an indicator corresponding to the risk of cerebrovascular diseases as assessed by the risk computation part without invasive procedure or MRI examination of the human subject.