| 摘要 |
PROBLEM TO BE SOLVED: To obtain a needle assembly where a spinal code needle is surely locked as against a dura mater needle. SOLUTION: The needle assembly consists of an assembly 1 having a first needle 10 and the assembly 2 having the second needle 30 insertion possible into the first needle 10. Grasp forming parts are provided, which permit one of a rear projecting material 16 in the rear end part of the first needle 10 or a front projecting material 32 in the second needle 30 to be insertion possible into the other material and are mutually engaged with the outer surface of one material and with the inner surface of the other material so as to execute a linkage operation. Then, one of the grasp forming part is provided with an elastic material 33 and the other grasp forming part is provided with a first thin and long area 20 which contains the elastic material 33 so as to permit it to slide along length and to be fitted and the second thin and long area 21 which prevents the elastic material from moving in a longitudinal direction through the elastic material 33 is slid in a horizontal direction when the two materials 16 and 32 are mutually twisted and forms a surface forming part for locking correlative movement in the longitudinal direction. |
