Drainage needle tube for abdominal cavity double-sleeve lavage

A drainage needle tube for abdominal cavity double-sleeve lavage belongs to the technical field of medical apparatuses and instruments and comprises a needle head, a needle head location ring, a three-way through pipe, a filling catheter, a drainage catheter and a control switch. The needle head location ring is arranged on the outside of the tail end of the needle head, the tail end of the needle head is connected with the three-way through pipe, one connector in the three-way through pipe is connected with the filling catheter, and another connector is connected with the drainage catheter. The control switch of the drainage catheter is arranged on the drainage catheter. The feeding end of the filling catheter is communicated with a liquid heater, drainage and filling can be finished once by means of the double-sleeve structure design, and operation change is reduced. A drainage channel and a filling channel are divided through the three-way through pipe, so that cross infection is effectively avoided. The l