METHOD OF DISTAL BLOCKING OF INTRAMEDULLARY IMPLANTS Russian patent published in 2023 - IPC A61B17/58 A61B17/72 

FIELD: medicine; operative traumatology; orthopedics.

SUBSTANCE: invention can be used for distal blocking of intramedullary implants. If there is a channel in the implant, a guide rod corresponding to the diameter of the channel is inserted into it to the level of the proximal hole in the distal part of the implant. The first guide in the form of a cylinder is installed in the drilled proximal through hole, at one end of which there is a through hole, the axis of which is perpendicular to the axis of the first guide, and at the other end there is a groove corresponding in shape to the side surface of the guide rod inserted into the channel. The axis of the groove corresponds to the axis of the through hole of the first guide. A block for positioning drills is installed on the first guide, having the first and second through parallel holes, the axes of which correspond to the axes of the implant holes, as well as the third through hole, the axis of which is located perpendicular to the axes of the above holes, crosses them and is parallel to the axis of the groove of the first guide. The drill positioning block is installed so that the first guide is located in the first through hole. A needle is inserted into the third through hole, passing into the through hole of the first guide. A drill is inserted into the second through hole of the drill positioning block and a through hole is formed in the bone through the hole in the implant. The drill is left in the bone to fix the block for positioning the drills. A drill is inserted into the fourth through hole located in the block for positioning drills and corresponding to the hole in the implant located perpendicular to the first and second through holes, and a through hole is formed in the bone. The drill is left in the bone. Then, the guide rod and the first guide are removed, a drill is inserted into the first through hole of the drill positioning block, and a through hole is formed in the bone through the hole in the implant. The drills and the drill positioning block are removed and screws are screwed into the resulting holes. If there is no channel in the implant, a retainer in the form of a screw with a longitudinal groove in its head is inserted into the 5th proximal hole of the implant before its installation. It is screwed into the expansion block. The expansion block is enlarged in the transverse dimension, resting against the walls of the implant hole until it is fixed in a position in which the longitudinal axis of the screw groove corresponds to the longitudinal axis of the implant. A second guide in the form of a cylinder is installed in the fixator into the drilled through hole in the bone, at one end of which there is a through hole, the axis of which is perpendicular to the axis of the second guide, and at the other end there is a tip corresponding in shape to the longitudinal groove of the screw, and the longitudinal axis of the tip corresponds to axis of the through hole of the second guide. A block for positioning drills is installed on the second guide, having the first and second through holes, the axes of which correspond to the axes of the implant holes, as well as the third through hole, the axis of which is perpendicular to the axes of the above holes, crosses them and is parallel to the longitudinal axis of the tip of the second guide. The drill positioning block is installed so that the second guide is located in the first through hole. A needle is inserted into the third through hole, passing into the through hole of the second guide. A drill is inserted into the second through hole of the drill positioning block and a through hole is made in the bone through the hole in the implant. The drill is left in the bone to fix the block for positioning the drills. A drill is inserted into the fourth through hole, also located in the block for positioning drills and corresponding to the hole in the implant, located perpendicular to the first and second through holes, and a through hole is formed in the bone. The second guide is removed, the screw is unscrewed from the expansion block and the retainer is removed through the hole formed. A drill is inserted into the first through hole, a through hole is formed in the bone through the hole in the implant. Drills, block for positioning drills are removed and screws are screwed into the formed holes.

EFFECT: method provides reduction of radiation exposure to the patient and medical personnel, reduction of the duration of the operation due to the use of a guide.

1 cl, 7 dwg, 2 ex