Gauge for measuring height of external ventricular drainage pipe

The utility model relates to a gauge for measuring the height of an external ventricular drainage pipe. The gauge comprises a pipe-shaped body, a telescopic plug rod and a telescopic pull rod. The telescopic plug rod and the telescopic pull rod are both telescopically sleeved by the body of the gauge. A laser light is arranged at the bottom of the body of the gauge, and the light emission direction of the laser light is perpendicular to the axial direction of the telescopic plug rod. According to the utility model, while the gauge is in use, the telescopic plug rod is plugged into a transfusion pole hole to make the emission direction of the laser light to be horizontal, and a certain reference position, which is pointed by the light beam of the laser light, of a patient is used as a 0 point; the telescopic pull rod is pulled out and adjusted to a proper height, and then the drainage can be started; and if the body position of the patient is changed, the telescoping distance of the telescopic plug rod is adju