Dual-tier spinal clamp locking and retrieving system

摘要

A dual-tier spinal clamp locking and retrieving system comprises a slotted clamp member, a tongued clamp member, and a clamp adjusting device. The slotted clamp member is composed of a hooked portion to hold a vertebra intended to be locked, a connecting portion, and a locking block having a through hole. The connecting portion or the locking block has one or more locking slots. The tongued clamp member is composed of a hooked portion to-hold another vertebra intended to be locked, a connecting portion, and a tongue having thereon a locking block with a through hole. The tongue is dimensioned to fit into the locking slot of the slotted clamp member. The clamp adjusting device holds together the slotted clamp member and the tongued clamp member to effect a first tier locking mechanism. The tongue of the tongued clamp member is inserted into and held in the locking slot of the slotted clamp member so as to bring about a second tier locking mechanism.