The team isolated 719 neurons from 1,302 valid channels, with a maximum of 135 neurons recorded simultaneously in one patient. The first 10 successful cases used 128-channel arrays and the final case used an upgraded 256-channel device. The flexible shanks moved with brain pulsation, and the researchers reported stable waveforms during recordings lasting as long as 36.5 minutes.
Five early cases produced no valid single-unit recordings, mainly because of operating-room electrical noise or damaged insertion-needle tips. Those failures are important for assessing clinical usability. The study tested short intraoperative recording and did not evaluate chronic tissue response, signal longevity or long-term device safety. StairMed provided electrode fabrication, hardware, software and medical support.