FIELD: medicine, in particular, devices for introducing the catheter through the vein. SUBSTANCE: the device has a body for receiving the cannula needle, means for needle protection, rear member of the protection, front member of the protection installed for sliding on the rear member of the protection. The front member of the protection is made for removal to the body in the working position of the cannula needle. The front and rear members of the protection can be telescopically withdrawn relative to each other and the body for formation of a protective cavity for the cannula needle after its removal from the patient's body. EFFECT: complete and reliable withdrawal of the cannula to the protecting medium. 13 cl, 2 dwg
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