The present technology relates generally to blood flow measuring systems and associated devices and methods. In some embodiments, a system for measuring blood flow during a cardiac arrest configured in accordance with the technology comprises an interface element configured to be removably attached to a patients skin at a target site proximate to a carotid artery of the patient, a hand-held ultrasound transducer configured to be positioned in contact with the interface element at the target site, and a controller operably coupled to the ultrasound transducer and configured to determine a blood flow velocity of the patient based on received ultrasound data. In some embodiments, the adhesive member can include one or more reference indicia corresponding to anatomical landmarks associated with a desired position of the ultrasound transducer relative to the carotid artery.
