A Doppler ultrasound device comprising: a Doppler ultrasound instrument including: ultrasound pulse control and data acquisition electronics configured to acquire Doppler ultrasound data; an N-channel connector port configured to simultaneously operatively connect up to N ultrasound transducer patches with the ultrasound pulse control and data acquisition electronics where N is an integer equal to or greater than two, wherein each ultrasound transducer patch includes an ultrasound transducer array comprising ultrasound transducers ; and an electronic processor programmed to concurrently determine up to N blood flow velocities corresponding to up to N ultrasound transducer patches operatively connected to the N-channel connector port from Doppler ultrasound data acquired using the respective ultrasound transducer patches, characterized in that the electronic processor is further programmed to determine the blood flow velocity for each ultrasound transducer patch by operations including: determining a transducer blood flow velocity for each ultrasound transducer of an array of ultrasound transducers of the ultrasound transducer patch from Doppler ultrasound data acquired using the ultrasound transducer; and determining the blood flow velocity for the ultrasound transducer patch as a highest determined transducer blood flow velocity of the array of ultrasound transducers or as an aggregation of a set of highest determined transducer blood flow velocities of the array of ultrasound transducers. a Doppler ultrasound instrument including: ultrasound pulse control and data acquisition electronics configured to acquire Doppler ultrasound data; an N-channel connector port configured to simultaneously operatively connect up to N ultrasound transducer patches with the ultrasound pulse control and data acquisition electronics where N is an integer equal to or greater than two, wherein each ultrasound transducer patch includes an ultrasound transducer array comprising ultrasound transducers ; and an electronic processor programmed to concurrently determine up to N blood flow velocities corresponding to up to N ultrasound transducer patches operatively connected to the N-channel connector port from Doppler ultrasound data acquired using the respective ultrasound transducer patches, characterized in that the electronic processor is further programmed to determine the blood flow velocity for each ultrasound transducer patch by operations including: ultrasound pulse control and data acquisition electronics configured to acquire Doppler ultrasound data; an N-channel connector port configured to simultaneously operatively connect up to N ultrasound transducer patches with the ultrasound pulse control and data acquisition electronics where N is an integer equal to or greater than two, wherein each ultrasound transducer patch includes an ultrasound transducer array comprising ultrasound transducers ; and an electronic processor programmed to concurrently determine up to N blood flow velocities corresponding to up to N ultrasound transducer patches operatively connected to the N-channel connector port from Doppler ultrasound data acquired using the respective ultrasound transducer patches, characterized in that the electronic processor is further programmed to determine the blood flow velocity for each ultrasound transducer patch by operations including: determining a transducer blood flow velocity for each ultrasound transducer of an array of ultrasound transducers of the ultrasound transducer patch from Doppler ultrasound data acquired using the ultrasound transducer; and determining the blood flow velocity for the ultrasound transducer patch as a highest determined transducer blood flow velocity of the array of ultrasound transducers or as an aggregation of a set of highest determined transducer blood flow velocities of the array of ultrasound transducers. <EOS>