The utility model belongs to the technical field of
medical instruments, and particularly discloses a
peritoneal dialysis external short tube which comprises a
catheter, a knob switch and a sleeve, the knob switch and the sleeve are coaxially connected to the outer side of the
catheter, and one end of the sleeve can extrude the
catheter to control liquid
medicine flow by screwing the knob switch. An internal thread connector and an external thread connector are arranged at the two ends of the guide
pipe respectively, each of the internal thread connector and the external thread connector comprises a head portion and a rod portion which are coaxially connected, a first anti-
slip ring is arranged on the rod portion of the internal thread connector, and a second anti-
slip ring is arranged on the rod portion of the external thread connector. The two ends of the guide
pipe are arranged on the rod portion of the internal thread connector and the rod portion of the external thread connector in a sleeving mode respectively, and the internal thread connector and the external thread connector are covered with a protective cap and a cap shell respectively. According to the
peritoneal dialysis connecting device, liquid leakage and pipeline
pollution of connection of the
peritoneal dialysis liquid end or the peritoneal
dialysis patient end can be avoided, so that it is guaranteed that peritoneal
dialysis treatment is safely and effectively conducted on a peritoneal
dialysis patient, infection is reduced, and
peritonitis is reduced.