股骨髓内钉远端锁钉置入的模型骨实验.

BACKGROUND: Intramedullary nail is a classical scheme for the treatment of femoral shaft fracture. Its distal aiming frame is widely used in the placement of distal locking nail, which improves the accuracy of distal locking nail placement, but its failure rate cannot be ignored. It is urgent to develop a new technology that can actualize the rapid and accurate locking of distal locking nail and reduce the X-ray radiation damage of bare-handed locking nail. OBJECTIVE: To compare the effect of place-occupying compression rod technique and bare-hand locking nail technique in distal locking nail placement of femoral intramedullary nail. METHODS: The eight model bones with the deviation of the compression rod that could not be accurately placed into the distal locking nail were divided into two groups. The place-occupying compression rod group (n=4) adopted the place-occupying compression rod technology. After drilling the hole adjacent to the original pressure rod hole, the accurate pressing rod was carried out, and then the distal locking nail placement carried on. In the bare-hand locking nail group (n=4), the technique of bare-hand nail under the supervision of C-arm was used to complete the placement of locking nail in the distal locking hole. The X-ray exposure times, nail locking time and nail placement accuracy were compared between the two groups. RESULTS AND CONCLUSION: (1) The number of X-ray exposure in the place-occupying compression rod group was significantly less than that in the bare-hand locking nail group (P < 0.05). The time of locking nail in the place-occupying compression rod group was significantly shorter than that in the bare-hand locking nail group (P < 0.05). The accuracy of nail placement in both groups was 100%. (2) The results showed that the technique of place-occupying compression rod and the technique of bare-hand locking nail could complete the placement of distal locking nail accurately, and the technique of place-occupying compression rod has the advantages of shorter operation time and less X-ray radiation compared with the technique of bare-hand locking nail. [ABSTRACT FROM AUTHOR]