String body model device for ultrasonic transcranial Doppler blood flow analyzer

Abstract

The invention discloses a String body model device for an ultrasonic transcranial Doppler blood flow analyzer. A cavity of a water tank is provided with a support rod for hanging a Doppler probe, and a Doppler string rotates on the bottom surface of the water tank through a pulley block driven by a first motor. The first motor is driven by a controller unit. The main calibration items are blood flow velocity error, blood flow detection depth and blood flow direction identification. By injecting a proper amount of water or medium into the water tank as a human body medium and by clamping the Doppler probe with a rotatable, identifiable and angle-adjustable clamp unit, a spectrum is acquired. By moving the Doppler probe along a horizontal direction of the string transmission through a screw rod and performing the motion measurement, the parameters required for the blood flow velocity error, the blood flow detection depth and the blood flow direction identification are measured. The string body model device is simple in structure, cheap in production and maintenance cost, difficult to damage, easy to scrub, and compliant to relevant standards as a whole, and has high practicability and wide applicability.

Description

technical field [0001] The invention relates to a string type phantom device, in particular to a string type phantom device for an ultrasonic transcranial Doppler blood flow analyzer, belonging to the technical field of blood flow analysis quality detection. Background technique [0002] Transcranial Doppler ultrasound (transcranial Doppler ultrasound): the use of ultrasound Doppler technology to measure intracranial and extracranial blood flow, referred to as TCD. [0003] TCD mainly evaluates the blood flow status based on the blood flow velocity. Since the inner diameter of the cerebral blood vessels is almost constant under the same conditions, the local cerebral blood flow can be inferred according to the decrease or increase of the cerebral blood flow velocity. Change accordingly. [0004] Blood flow velocity reflects the size of cerebral artery lumen and blood flow. When the blood flow is constant, the blood flow velocity is inversely proportional to the size of the...

AI Technical Summary

Problems solved by technology

However, at present, most of the testing equipment still mainly relies on imports, and the test specimens are mainly imitation blood fluid phantoms (Pharmaceutical Industry Standard of the People's Republic of China YY / T 0458-2003 "Technical Requirements for Ultrasonic Doppler Imitation Blood Fluid Phantoms") 》), the purpose of imitating the blood flow model is to generate the Doppler frequency spectrum of the blood in the blood vessels of the simulated human body, and generally only set, monitor and calibrate the flow rate, although some manufacturers on the market provide reference flow rate values ​​corresponding to the flow rate , but due to the large and unstable flow velocity difference between the pipe center and near the pipe wall, this method is more suitable for design verification and factory inspection

Secondly, the phantom is more complicated to carry, assemble, detect and operate.

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