This invention provides an ultrasound probe, a device and method for acquiring a blood flow signal of an artery and a system for measuring systolic blood pressure. The ultrasound probe comprises a plurality of ultrasound transducers, wherein each of the plurality of ultrasound transducers is configured to obtain an echo signal by transmitting an ultrasonic wave, receiving an ultrasonic wave and transforming the received ultrasonic wave into the echo signal. The device for acquiring a blood flow signal of an artery comprises the ultrasound probe, wherein the ultrasound probe is intended to be attached to the exterior of the body. The device further comprises: a first deriving unit configured to derive, from each obtained echo signal, at least one Doppler signal, the at least one Doppler signal being associated with the ultrasound transducer obtaining the echo signal and being indicative of information about Doppler shift of the echo signal a selecting unit configured to select a Doppler signal from the derived Doppler signals according to a predefined condition, the selected Doppler signal being indicative of the at least one characteristic of the blood flow in the artery of the body. In this way, the need for accurate localization of the artery by means of manual adjustment is eliminated on the proviso that the ultrasound probe is attached in such a way that the artery lies within the footprint of the ultrasound probe.Cette invention concerne une sonde à ultrasons, un dispositif et un procédé pour acquérir un signal découlement sanguin dans une artère et un système pour mesurer la pression sanguine systolique. La sonde à ultrasons comprend une pluralité de transducteurs à ultrasons, chaque transducteur de ladite pluralité de transducteurs à ultrasons étant conçu pour obtenir un signal décho par émission dune onde ultrasonore, réception dune onde ultrasonore et transformation de londe ultrasonore reçue en signal décho. Le dispositif pour acquérir un signal découlemen
