scholarly journals A Retrospective Analysis of S2 Iliosacral Screw Fixation Using Robot-Assisted Navigation for Unstable Pelvic Injuries and Sacral Dysmorphism: a Report of 16 Cases

10.29007/nppx ◽  
2018 ◽  
Author(s):  
Wang Junqiang ◽  
Han Wei ◽  
Zhang Teng ◽  
Su Yonggang ◽  
Wu Xinbao ◽  
...  
Keyword(s):  
Retrospective Analysis ◽  
Screw Fixation ◽  
Pelvic Ring ◽  
Guide Wire ◽  
Operation Time ◽  
High Rate ◽  
Iliosacral Screw ◽  
Robot Assisted ◽  
Assisted Navigation ◽  
Screw Insertion

Objective The second sacral segment iliosacral screw (S2 screw) insertion is a demanding technique, with a high rate of screw malposition due to the complex pelvic anatomy. TiRobot™ is an orthopedic surgery robot which can be used for S2 screw fixation. We carried out a retrospective analysis of the accuracy of S2 screws using robot-assisted navigation.Methods A retrospective analysis of 16 patients admitted and managed by S2 screw fixation for unstable pelvic fractures was carried out for evaluation of its efficacy and safety. all patients with pelvic ring disruptions and sacral dysmorphism were evaluated radiographically and S2 screws were placed using a robot-assisted navigation technique. Screw position was assessed and classified using postoperative computed tomography. Fisher’s exact probabilities test was used to analyse the screws’ positions. Surgical time after reduction of the pelvis, insertion time for guide wire, number of guide wire attempts, and radiation exposure without pelvic reduction were also assessed.Results The excellent and good rate of screw placement was 100%. The fluoroscopy time after pelvic reduction was 7 (7, 9) seconds. The operation time after reduction of the pelvis was 29 (27,33). Time for guide wire insertion was 2.0 (2, 2) minutes. The number of guide wire attempts was 0.0 (0, 0). No postoperative complications or revisions were reported.Conclusion S2 iliosacral screws can be safely and accurately accomplished using a robot-assisted navigation technique in patients with unstable posterior pelvic ring disruptions and sacral dysmorphism.

scholarly journals Percutaneous iliosacral screw fixation for posterior pelvic ring injuries: the first experience, complicatons

2013 ◽  
Vol 12 (4) ◽  
pp. 233-237
Author(s):  
Valentinas Uvarovas ◽  
Andrius Vaitiekus ◽  
Igoris Šatkauskas ◽  
Donatas Ulevičius
Keyword(s):  
Screw Fixation ◽  
Pelvic Ring ◽  
Operation Time ◽  
Definitive Treatment ◽  
Invasive Technique ◽  
Iliosacral Screw ◽  
Early Results ◽  
First Results ◽  
Group B ◽  
Iliosacral Screw Fixation

BackgroundPercutaneous iliosacral screw fixation is a minimally invasive technique for the treatment of unstable pelvic injuries involving the posterior ring. Nevertheless, screw malposition may result in dangerous complications involving injury to adjacent neurological structures. This study was conducted in order to evaluate the first results of using the percutaneous iliosacral screw technique at the Republican Vilnius University Hospital.ObjectiveTo report the early results and possible complications of percutaneous iliosacral screw fixation in the management of unstable pelvic ring injuries.MethodsThe data for the period 2011–2013 were collected retrospectively. Fifty-five patients who suffered from injury to the pelvic ring requiring surgical treatment were included in this study. Twenty-two operations were done using canulated screws(group A, 20 operations using 7.3 mm and 2 operations 8.3 mm screws), and 33 (group B) operations were done using noncanulated 6.5 mm screws. We compared our first results of using canulated and non-canulated screws. The data were analysedusing MS Exel.ResultsFrom the analysed 55 patients, 20 (36.4%) were men and 35 (63.6%) women; the average age of the patients was 51 (range, 21–98) years. According to the AO (Arbeitsgemeinschaft für Osteosynthesefragen) classification, there were 49 patients withtype B and 6 patients with type C. The mean operation time was 36 min (range, 10–115). Three patients from group B required reoperation because of a neurological injury. Two of these patients suffered from L5 neuropathy and one from S1 radiculalgy.The complication rate was 9.1 per cent in group B, and they were now complicationa in group B. Twelve patients underwent percutaneous iliosacral screw fixation and anterior fixation, one patient underwent percutaneous iliosacral conversion to open posterior SI fixation osteosynthesis because of neurological complications, while the other 43 patients underwent percutaneous screw fixation only.ConclusionsPercutaneous iliosacral screw fixation is a rapid, safe and definitive treatment for unstable pelvic ring injury. The technique using standard C-arm fluoroscopy may allow accurate location of the screw placed in S1 and result in fewer complications when using percutaneous canulated screws. Key words: percutaneous iliosacral fixation, canulated iliosacral screws, three-dimensional fluoroscopyPerkutaninė kryžkaulio klubikaulio sąnario fiksacija esant užpakalinio dubens žiedo sužalojimams: pirmoji patirtis, komplikacijos  Įvadas / tikslasPerkutaninė kryžkaulio klubakaulio sąnario fiksacija sraigtais yra minimaliai invazinis operacinio gydymo metodas nestabiliems užpakalinio dubens žiedo sužalojimams gydyti. Vis dėlto gretimos nervinės struktūros gali būti pažeistos dėl blogossraigto padėties. Mūsų darbo tikslas – įvertinti Respublikinės Vilniaus universitetinės ligoninės pirmuosius kryžkaulio klubikaulio sąnario operacinio gydymo perkutaninės fiksacijos būdu rezultatus ir nustatyti nestabilių dubens žiedo sužalojimųgydymo komplikacijų dažnį.MetodaiRetrospektyviai išanalizuoti 2011–2013 metais gydytų 55 pacientų duomenys. Atliktos 22 operacijos naudojant kaniuliuotus (A grupė, 20 operacijų naudojant 7,3 mm ir 2 operacijos 8,3 mm sraigtus) ir 33 (B grupė) – nekaniuliuotus 6,5 mm sraigtus.Palyginome pirmuosius operacinio gydymo kaniuliuotais ir nekaniuliuotais sraigtais rezultatus. Duomenys analizavome MS Exel programa.RezultataiOperuoti 55 pacientai, iš jų 20 (36,4 %) vyrų ir 35 (63,6 %) moterys. Tiriamųjų amžiaus vidurkis – 51 (21–98) metai. Pagal AO (Arbeitsgemeinschaft für Osteosynthesefragen) klasifikaciją buvo 49 pacientai. Trys B grupės (9,1 %) pacientai buvo peroperuoti dėl neurologinių komplikacijų (du pacientai dėl L5 neuropatijos ir vienas dėl S1 radikulialgijos). A grupės pacientams komplikacijų nebuvo. Dvylikai pacientų atlikta perkutaninė kryžkaulio klubakaulio sąnario fiksacija ir kartu priekinė fiksacija ir 43 pacientams – tik užpakalinė kryžkaulio klubakaulio sąnario fiksacija sraigtu.IšvadosPerkutaninė kryžkaulio klubakaulio sąnario fiksacija yra greitas, saugus ir galutinis nestabilių užpakalinio dubens žiedo sužalojimų operacinio gydymo metodas. Naudojant standartinį rentgeno C-lanką galima tiksliai lokalizuoti sraigto padėtį S1slankstelio lygyje. Naudojant kaniuliuotus sraigtus komplikacijų nepasitaikė, o naudojant nekaniuliuotus sraigtus galimos neurologinės komplikacijos.Reikšminiai žodžiai: perkutaninė kryžkaulio klubakaulio sąnario fiksacija, kaniuliuoti kryžkaulio klubakaulio sraigtai, trijų dimensijų fluoroskopija.

Robot-assisted S2 screw fixation for posterior pelvic ring injury

Injury ◽  
2020 ◽  
Author(s):  
Junqiang Wang ◽  
Teng Zhang ◽  
Wei Han ◽  
KeHan Hua ◽  
Xinbao Wu
Keyword(s):  
Screw Fixation ◽  
Pelvic Ring ◽  
Pelvic Ring Injury ◽  
Robot Assisted ◽  
Posterior Pelvic Ring ◽  
Posterior Pelvic Ring Injury

scholarly journals Comparison of Lumbopelvic Fixation and Iliosacral Screw Fixation for the Treatment of Bilateral Sacral Fractures

2021 ◽  
Author(s):  
Katharina E. Wenning ◽  
Emre Yilmaz ◽  
Thomas A. Schildhauer ◽  
Martin F. Hoffmann
Keyword(s):  
Operative Time ◽  
Screw Fixation ◽  
Pelvic Ring ◽  
Weight Bearing ◽  
Iliosacral Screw ◽  
Posterior Pelvic Ring ◽  
Sacral Fractures ◽  
Lumbopelvic Fixation ◽  
Pelvic Ring Injuries ◽  
Iliosacral Screw Fixation

Abstract Background: Bilateral sacral fractures result in traumatic disruption of the posterior pelvic ring. Treatment for unstable posterior pelvic ring fractures should aim for fracture reduction and rigid fixation to facilitate early mobilization. Iliosacral screw fixation (ISF) and lumbopelvic fixation (LPF) were recommended for the treatment of these injuries. No algorithm or gold standard exists for surgery of these fractures. Purpose: The purpose of this study was to evaluate the differences between ISF and LPF in bilateral sacral fractures regarding intraoperative procedures, complications, and postoperative mobilization. The secondary aim was to determine if demographics influence surgical treatment.Methods: Over a 4-year period (2016-2019) 188 consecutive patients with pelvic ring injuries were treated at one academic level-1 trauma center and retrospectively identified. Fractures were classified according to the AO/OTA classification system. 77 patients were treated with LPF or ISF in combination with internal fixation of pubic rami fractures and could be included in this study. Comparisons were made between demographic and perioperative data. Infection, hematoma, and hardware malpositioning were used as complication variables. Mobilization with unrestricted weight-bearing was used as outcome variable. Follow-up was at least 6 months postoperatively.Results: Operative stabilization of bilateral posterior pelvic ring injuries was performed in 77 patients. Thereof, 29 patients (females 59%) underwent LPF whereas 48 patients (females 83%) had bilateral ISF. The ISF group was older (76 yrs.) compared to the LPF group (62 yrs.) (p=0.001), but no differences regarding BMI or comorbidities were detected. Time for surgery was reduced for patients who were treated with ISF compared to lumbopelvic fixation (165 min vs. 73 min; respectively, p<0.001). But this did not result in reduced fluoroscopic time or radiation exposure. Overall complication rate was not different between the groups. Patients with LPF had a greater length of stay (p=0.008) but were all weight-bearing as tolerated when discharged (p<0.001). Conclusion: Bilateral posterior pelvic ring injuries of the sacrum can be sufficiently treated by LPF or ISF. LPF allows immediate weight-bearing which may benefit younger patients and patients with an elevated risk for pneumonia or other pulmonary complications. Treatment with ISF reduces operative time, length of stay and postoperative wound infection. Elderly patients may be better suited for treatment with ISF if there is concern that the patient may not tolerate the increased operative time.

COMPARISON OF X-RAY AND CT METHODS FOR ASSESSING SACRAL SHAPE VARIANTS AND IDENTIFYING A SECURE SACROILIAC SCREW FIXATION CORRIDOR

2019 ◽  
Vol 22 (03n04) ◽  
pp. 1950007
Author(s):  
Florian Radetzki ◽  
Felix Goehre ◽  
Stefan Schwan ◽  
Andreas Wienke ◽  
Lars Jansch ◽  
...  
Keyword(s):  
Predictive Value ◽  
Screw Fixation ◽  
Pelvic Ring ◽  
Invasive Technique ◽  
Posterior Pelvic Ring ◽  
Predictive Values ◽  
X Ray ◽  
Sacroiliac Screw ◽  
Screw Insertion ◽  
Sacroiliac Screw Fixation

Sacroiliac screw fixation is the only minimally invasive technique for stabilizing unstable posterior pelvic ring fractures. X-ray/CT methods identify sacral shape variants, which influence screw fixation feasibility at sacral segment S1. As no reliability analysis was previously published, this study analyzed four X-ray/CT-based screw corridor evaluation methods. CT datasets of 80 human pelvises (♂[Formula: see text][Formula: see text], ♀[Formula: see text][Formula: see text], [Formula: see text] years, [Formula: see text][Formula: see text]cm, [Formula: see text][Formula: see text]kg) were used. CTs were post-processed using Amira 5.2 software to generate 3D models and analyzed for S1 transverse 7.3[Formula: see text]mm screw corridors using a C++ program. CT-slices and radiograph-like images were generated per each classification’s requirements. Five surgeons independently assessed sacral shape and transverse screw insertion feasibility. Sensitivity, specificity, and positive/negative predictive values were calculated. C++ analysis indicated feasible screw insertion in 66 cases (82%). Sensitivities were 86% (Mendel), 75% (Routt), 74% (Carlson), and 67% (Kim). Specificities were 73% (Mendel) and 79% (Kim). Mean positive predictive value spanned from 54.6% (Mendel) to 26.2% (Carlson); negative predictive value spanned from 94.5% (Kim) to 90.4% (Carlson). No significant differences existed between surgeons. Mendel’s classification provides reliable and reproducible assessment via the lateral sacral triangle, without additional CTs like Carlson or Routt or the subjectivity of Kim’s method.

scholarly journals Robot-assisted treatment of unstable pelvic fractures with a percutaneous iliac lumbar double rod fixation combined with a percutaneous pelvic anterior ring INFIX fixation

2020 ◽  
Vol 44 (6) ◽  
pp. 1223-1232
Author(s):  
Wei Du ◽  
Tao Sun ◽  
Yan Ding ◽  
Chuanqiang Jiang ◽  
Wenqing Qu ◽  
...  
Keyword(s):  
Pelvic Ring ◽  
Vena Cava ◽  
Operation Time ◽  
Pelvic Fractures ◽  
Robot Assisted ◽  
Posterior Pelvic Ring ◽  
Vein Thrombosis ◽  
Pelvic Ring Fractures ◽  
A Prospective Study ◽  
Anterior Ring

Abstract Objective To investigate the clinical effect of robot-assisted treatment of unstable pelvic fractures through a percutaneous iliac lumbar double rod fixation combined with a percutaneous pelvic anterior ring INFIX (internal fixator) fixation. Methods This was a retrospective analysis of 17 cases of unstable anterior and posterior pelvic ring fractures treated between April 2016 and October 2018 by the third Ti-robot system produced in China. The posterior ring was supported with an iliac lumbar double rod fixation and the anterior ring with an INFIX fixation. Operation time and peri-operative bleeding were recorded. The reduction of pelvic fracture displacement was evaluated by Matta score, the post-operative results were evaluated according to Majeed score, and the complications were recorded. Results Twelve males and five females, aged 21–71 years (mean 40.1 ± 3.8 years) were followed up for three to 12 months, (median 6.7 months). Tile typing showed seven B1 type, two B2 type, and eight C1 type cases. Operation time was 90–160 minutes (mean 112.9 ± 16.8 minutes), bleeding was 80–150 mL (mean 105.9 ± 20.6 mL). X-ray three to five  days after operation was evaluated by Matta score as excellent in 15 and good in two cases. Majeed score at last follow-up was 85–98 points, excellent in 17 cases. Two cases of lower extremity deep vein thrombosis received an inferior vena cava filter. The filters were removed after two  weeks. One case showed incision fat liquefaction healing and the wound healed three  weeks after surgery. Conclusion Orthopedic robot-assisted treatment of unstable pelvic fractures by a percutaneous iliac lumbar double rod fixation and a percutaneous pelvic anterior ring INFIX fixator was minimally invasive and feasible. A prospective study is needed.

Percutaneous Iliosacral Screw Fixation for Pelvic Ring Injury

2005 ◽  
Vol 40 (1) ◽  
pp. 1
Author(s):  
Taek Rim Yoon ◽  
Jong Keun Seon ◽  
Jun Yub Lee ◽  
Hyoung Won Kim
Keyword(s):  
Screw Fixation ◽  
Pelvic Ring ◽  
Iliosacral Screw ◽  
Pelvic Ring Injury ◽  
Iliosacral Screw Fixation

scholarly journals Comparison of lumbopelvic fixation and iliosacral screw fixation for the treatment of bilateral sacral fractures

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Katharina E. Wenning ◽  
Emre Yilmaz ◽  
Thomas A. Schildhauer ◽  
Martin F. Hoffmann
Keyword(s):  
Operative Time ◽  
Screw Fixation ◽  
Pelvic Ring ◽  
Weight Bearing ◽  
Iliosacral Screw ◽  
Posterior Pelvic Ring ◽  
Sacral Fractures ◽  
Lumbopelvic Fixation ◽  
Pelvic Ring Injuries ◽  
Iliosacral Screw Fixation

Abstract Background Bilateral sacral fractures result in traumatic disruption of the posterior pelvic ring. Treatment for unstable posterior pelvic ring fractures should aim for fracture reduction and rigid fixation to facilitate early mobilization. Iliosacral screw fixation (ISF) and lumbopelvic fixation (LPF) were recommended for the treatment of these injuries. No algorithm or gold standard exists for surgery of these fractures. Purpose The purpose of this study was to evaluate the differences between ISF and LPF in bilateral sacral fractures regarding intraoperative procedures, complications and postoperative mobilization. The secondary aim was to determine whether demographics influence surgical treatment. Methods Over a 4-year period (2016–2019), 188 consecutive patients with pelvic ring injuries were treated at one academic level 1 trauma center and retrospectively identified. Fractures were classified according to the AO/OTA classification system. Seventy-seven patients were treated with LPF or ISF in combination with internal fixation of pubic rami fractures and could be included in this study. Comparisons were made between demographic and perioperative data. Infection, hematoma and hardware malpositioning were used as complication variables. Mobilization with unrestricted weight bearing was used as outcome variable. Follow-up was at least 6 months postoperatively. Results Operative stabilization of bilateral posterior pelvic ring injuries was performed in 77 patients. Therefore, 29 patients (females 59%) underwent LPF whereas 48 patients (females 83%) had bilateral ISF. The ISF group was older (76 yrs.) compared to the LPF group (62 yrs.) (p = 0.001), but no differences regarding BMI or comorbidities were detected. Time for surgery was reduced for patients who were treated with ISF compared to lumbopelvic fixation (73 min vs. 165 min; respectively, p < 0.001). But this did not result in reduced fluoroscopic time or radiation exposure. Overall complication rate was not different between the groups. Patients with LPF had a greater length of stay (p = 0.008) but were all weight bearing as tolerated when discharged (p < 0.001). Conclusion Bilateral posterior pelvic ring injuries of the sacrum can be sufficiently treated by LPF or ISF. LPF allows immediate weight bearing which may benefit younger patients and patients with an elevated risk for pneumonia or other pulmonary complications. Treatment with ISF reduces operative time, length of stay and postoperative wound infection. Elderly patients may be better suited for treatment with ISF if there is concern that the patient may not tolerate the increased operative time.

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