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  • Title: Minimally invasive stabilisation of posterior pelvic ring instabilities with pedicle screws connected to a transverse rod.
    Author: Wang H, Fu YH, Ke C, Zhuang Y, Zhang K, Wei X, Li Z, Lei JL, Zhang BF, Liu P.
    Journal: Int Orthop; 2018 Mar; 42(3):681-686. PubMed ID: 29238871.
    Abstract:
    PURPOSE: The goal was to evaluate the clinical outcomes, quality of reduction and complications of pelvic fractures treated by minimally invasive stabilisation of posterior pelvic ring instabilities with pedicle screws connected to a transverse rod. METHODS: Retrospective analysis of prospectively collected data in a consecutive patient series with pelvic fractures treated by minimally invasive stabilisation of posterior pelvic ring instabilities with pedicle screws between January 2010 and January 2016. The functional outcomes evaluated by Majeed scores, and fracture reduction results were evaluated using the Tornetta and Matta standard. As well as recording the duration of the surgical procedure, intraoperative blood loss, the times of intra-operative fluoroscopy and complications. RESULTS: A total of 29 patients (15 men and 14 women; age range, 21-72 years; mean, 40.8 years) could be followed-up after an average of 38.2 ± 21.3 months (range, 12-84 months). According to the AO/OTA classification, there were 24 patients with B2 injury and five patients with C1 injury of the pelvic ring. For the sacral fractures, according to Denis classification, four cases were zone I fractures and 25 cases were zone II fractures. The duration of the surgical procedure, intra-operative blood loss and the times of intra-operative fluoroscopic of the posterior-ring surgical procedure was 28.2 ± 4.6 minutes (range, 20-38 minutes), 46.7 ± 4.9 ml (range, 39-56 ml), and 13.1 ± 1.6 seconds (range, 10-17 seconds) respectively. Posterior-ring fracture reduction was excellent in 11 patients and 15 were good, three cases were fair; the excellent and good rate was 89.7% (26/29). At the final follow-up, the function result was rated as excellent in ten cases, good in 16, fair in three, and poor in zero cases; the excellent and good rate was 89.7% (26/29). There was no incision infection, intra-operative neurovascular injury, pedicle screw loose or breakage, and non-union of the posterior arch did not occur. Two patients requested removal of the fixator: one patient with breakage of the anterior pelvic ring internal fixator, and the pedicle screw was also taken out in the same operative session; another one with moderate pain on the posterior pelvic ring. CONCLUSIONS: Minimally invasive stabilisation of posterior-pelvic-ring instabilities with pedicle screw connected to a transverse rod may be a good alternative to sacroiliac screw fixation because it is quick, safe and associated with a good functional outcome; thus being a useful option in patients who do not qualify for sacroiliac screw fixation.
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