A Bacta pump was a compact emergency device that injected bacta into the blood. Bacta was then carried around the body, increasing the user's healing rate. When the bacta has been circulated, it was removed by the pump, filtered, cleaned and injected back into the body.
Bacta pumps were used during the New Sith Wars. Their relatively small size made them good for field medics to use, but they lost the effectiveness of a fully submersable Bacta tank, taking longer to heal injuries.