American scientists develop injection robots that use ultrasound to locate patients' blood vessels.

 

It is relatively easy to draw blood from patients whose veins are more obvious, but it is much more difficult for patients who cannot see or touch the veins. In this case, the staff may have to turn to the ultrasound machine to locate the vein more clearly. The blood-drawing robot jumps directly to this step, using built-in ultrasonic technology to guide the placement of needles. The whole system also includes a module for processing blood samples and a blood analyzer.

Because of its easy access to veins, the machine had a 97% chance of successfully drawing blood, and the overall success rate of 31 participants was 87%, the researchers said. For patients with difficult access to veins, the probability of clinicians failing is between 27% and 60%, depending on the nature of the patient's problem, according to the report. However, for inaccessible veins, the success rate of this machine seems to be lower than that of medical staff.

However, the robot is still a prototype, and researchers may improve its success rate in the future. One day, it may be used in ambulances. In addition, it can also be used in emergency rooms for procedures such as intravenous intubation, dialysis and placement of arterial tubes.

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