The invention provides a double-
saccule remaining needle, and belongs to the field of
medical device structure design. An upper cavity
saccule and a lower cavity
saccule are arranged in an infusion pipeline, an elastic saccule is arranged on the inner side of the
tail end of a remaining needle
pipe port, the upper cavity saccule is communicated with an
infusion catheter, and the lower cavity saccule is filled with air or safety liquid and communicated with the elastic saccule. When infusion is paused, a stop clamp is closed, so that infusion can be paused, firstly, a second upper
infusion catheter is compressed and closed by the stop clamp, secondly, the upper cavity saccule is compressed, so that
infusion solution in the upper cavity saccule is pushed into a remaining needle
pipe, the
pipe is automatically flushed, finally, the lower cavity saccule is compressed, so that the elastic saccule expands, and the remaining needle pipe is closed. When infusion is restarted, the stop clamp is opened, so that infusion can be restarted, the lower cavity saccule rebounds, the remaining needle pipe is opened, the upper cavity saccule rebounds, blood flows into the remaining needle pipe and a first
infusion catheter, and the blood is automatically pumped back. According to the double-saccule remaining needle, operation is simplified, patient pain is relieved, nurse
workload is reduced, the problem of blood
embolism easily caused by the remaining needle is completely solved, and patient safety is improved.