Objective To investigate the curative effect of using new irrigation pump in acute hematogenous osteomyelitis.Methods Forty patients with acute hematogenous osteomyelitis were divided into the control group and observation group,20 cases in each group.The control group adopted the conventional lavage for drainage,while the observation group used self-made irrigation pump.Then the clinical curative effect and cure time were compared between the two groups.Results The total effective rate in the observation group was 100.00 ％,which was significantly higher than 80.00 ％ in the control group(P＜0.05),and the difference was statistically significant(P＜0.05).The cure time in the observation group was(10.13 ± 8.03)d,which was significantly shorter than (18.14-±5.43)in the control group,and the difference was statistically significant(P＜0.05).Conclusion The curative effect of new type irrigation pump in acute hematogenous osteomyelitis is more acurate than that of conventional lavage for vacuum darianage.

BACKGROUND:Many scholars have developed a variety of dynamic elastic spine fixator. After biomechanical research, animal experiments and clinical application found that no one elastic spine fixator was general y recognized clinical y. OBJECTIVE:To compare the stress difference between“X”-shaped spine dynamic fixation and traditional pedicle screw fixation. METHODS:Three-dimensional finite element models of“X”-shaped spine dynamic fixation and traditional pedicle screw fixation were established according to adult spine imaging data. Mechanical differences in vertical compression, flexion, extension, lateral bending and rotation were compared between the two groups. RESULTS AND CONCLUSION:The stress at vertical compression was lower than that at flexion, extension, lateral bending and rotation in both groups. The stress at“X”-shaped spine dynamic fixation mainly focused on“X”-shaped connecting rod, but the stress of traditional pedicle screw fixation mainly focused on conjunction of screw-rod. Moreover, the stress of the screw of“X”-shaped spine dynamic fixation was significantly less than that of traditional pedicle screw fixation (P<0.001). These results suggest that“X”-shaped spine dynamic fixation system can share stress of screws and reduce the postoperative stress concentration compared with traditional pedicle screw fixation.