Abstract: A vaporizer includes: a vaporization shell; a vaporization assembly; and a protective assembly. The vaporization shell includes a liquid storage cavity. The vaporization assembly is arranged in the vaporization shell and has a heating structure and a liquid flowing channel, the liquid flowing channel being in communication with the heating structure so as to allow a vaporizable liquid medium in the liquid storage cavity to be outputted to the heating structure. The protective assembly is linked with the vaporization shell, the protective assembly being driven by rotating the vaporization shell to regulate an amount of a flowing liquid outputted from the liquid storage cavity to the liquid flowing channel, an amount of air entering the vaporization assembly, and on/off of a circuit between the vaporization assembly and a power supply assembly of an electronic vaporization device.

Abstract: A guiding apparatus for x-ray-free screw placement by a spinal posterior approach, comprising an interspinous spacer, a slide scale (1), and an angle-changing rod. The apparatus is simple to operate, easy to grasp, and well accepted by physicians. A reliable effect is provided in screw placement. Significantly reduced X-ray exposure is allowed for patients and medical staff. In a small-incision minimally invasive screw placement operation, even without exposing the spinal ligament, a small spike-like protrusion of a base (2) of the interspinous spacer can ensure accurate interspinous positioning across the skin. This is applicable for both minimally invasive and incision surgeries and has a wide range of uses.

Abstract: A guiding apparatus for x-ray-free screw placement by a spinal posterior approach, comprising an interspinous spacer, a slide scale (1), and an angle-changing rod. The apparatus is simple to operate, easy to grasp, and well accepted by physicians. A reliable effect is provided in screw placement. Significantly reduced X-ray exposure is allowed for patients and medical staff. In a small-incision minimally invasive screw placement operation, even without exposing the spinal ligament, a small spike-like protrusion of a base (2) of the interspinous spacer can ensure accurate interspinous positioning across the skin. This is applicable for both minimally invasive and incision surgeries and has a wide range of uses.