A medical guide wire comprising a guide wire hollowed sleeve member and a retention member provided through a hollowed central portion of the sleeve member. The sleeve member includes at least one retention member operational port allowing the retention arm to laterally extend therethrough and retract therein as desired. The functional end of the locking member can be of any reasonable shape and may include one or multiple extending retention arms. A solid penetrating head is integrated into the hollowed sleeve member or the retention member allowing for direct insertion during use. The operational port may be located through either a sidewall or the distal end of the sleeve member. The medical guide wire can be functionally reversed using a feature of a central actuating member to retain the retention arms of a respective hollowed sleeve member in a retracted, insertion configuration and release the retention arms for deployment.
