| 主权项 |
1. An intravenous catheter for guiding tip placement into a peripheral vein, comprising:
a flexible, tubular cannula including an insertion tip that is insertable into a peripheral vein; an sensor mounted external of the cannula for sensing and then generating an output signal representative of a sensed biological material including blood at the insertion tip of the cannula, wherein the sensor is mounted at a hub adapted to attach the cannula to an IV bag and the sensor comprises an acoustical transducer; a processor circuitry connected to the sensor output signal for receiving and then generating a display; and wherein the display provides a feedback to a medical personnel of insertion tip placement during transition into, placement within, and withdrawal from the peripheral vein of a patient body, wherein the feedback comprises a first signal during skin penetration, a second and different signal after skin penetration, and a third and further different signal upon the proper insertion of the cannula within the peripheral vein. |
