The invention relates to the technical field of dilators, in particular to a device for dilating a
urethral stricture and assisting in indwelling a
ureter. Comprising a holding
handle, one end of the holding
handle is provided with an expansion body, the bottom of the holding
handle is detachably connected with a miniature water pump, the water outlet end of the miniature water pump is detachably connected with a liquid inlet
pipe, the liquid inlet
pipe is detachably connected with the expansion body, the water inlet end of the miniature water pump is connected with a water inlet
pipe, the water inlet pipe is inserted into a
water storage tank, and normal
saline is placed in the
water storage tank. A water outlet pipe is arranged on the expansion body, water in the expansion body flows back into the
water storage tank through the water outlet pipe, the normal
saline entering speed is larger than the
backflow speed, stable expansion of the medical rubber layer can be achieved, the expansion volume can be accurately adjusted by controlling the conveying speed of the micro water pump, and the expansion state of the expansion body can be maintained; meanwhile, the temperature of normal
saline can be prevented from rising, the
mucous membrane is prevented from being scalded, and the expansion body can be always kept in a proper temperature range.