Control device of belt type continuously variable transmission

The utility model discloses an epidural puncture needle, which comprises a needle body, a needle core and a water holding device. The needle core is sleeved in the needle body, and the water holding device is installed at the tail of the needle core. The tail end of the needle core is the bottom Larger and smaller cones, the front end of the cone is a torus, and the front end of the torus is the connecting body and the core in turn; the core is a straight rod plus an arc elbow at the front end, and the needle core has a longitudinal through The water cavity, the water passage has a corresponding through hole from the arc elbow to the outer slope of the arc elbow, and the outer slope is affixed with a diaphragm; the water holding device includes a connecting sleeve, a silicon capsule, and a plastic bag. The continuous shrinkage of the silicon capsule is used to judge that the needle tip has entered the epidural space, and the puncture operation is stopped, which overcomes the difference in sensitivity of different operators, brings great convenience to the operator, and reduces the mental pressure during the operation. More importantly, it reduces the pain of repeated puncture for the patient, and it will not pierce the dura mater to bring life-threatening to the patient.

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