Complications of pelvic ring fixation in patients requiring laparotomy

Factors Associated With Infection in Patients With Combined Pelvic Ring and Bladder Injuries

OBJECTIVES

To identify the infection rate in patients with combined pelvic ring and bladder injuries. Secondary aims included identifying treatment and injury factors associated with infection.

METHODS

DESIGN

Retrospective review.

SETTING

Single Level I Tertiary Academic Center.

PATIENTS SELECTION CRITERIA

All patients over a 12-year period with combined pelvic ring and bladder injuries were evaluated. Exclusion criteria were nonoperative management of the pelvic ring, isolated posterior fixation, and follow-up <90 days.

OUTCOME MEASURE AND COMPARISONS

Primary outcome measured was deep infection of the anterior pelvis requiring surgical irrigation and debridement.

RESULTS

In total, 106 patients with anterior stabilization of the pelvis in the setting of a bladder injury were included. Seven patients (6.6%) developed a deep infection and required surgical debridement within 90 days. Patients undergoing open reduction and internal fixation with plating of the anterior pelvis and acute concomitant bladder repair had an infection rate of 2.2% (1/43). Patients undergoing closed reduction and anterior fixation with either external fixation or percutaneous rami screw after bladder repair had an infection rate of 17.6% (3/17). There was a higher infection rate among patients with combined intraperitoneal (IP) and extraperitoneal (EP) bladder injuries (23%) when compared with those with isolated EP (3.8%) or IP (9.1%) bladder injuries (P = 0.029).

CONCLUSIONS

Acute open reduction and internal fixation of the anterior pelvis in patients with combined pelvic ring and bladder injuries has a low infection rate. Patients with combined IP and EP bladder injuries are at increased risk of infection compared with those with isolated IP and EP injuries.

LEVEL OF EVIDENCE

Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

Surgical site infections after stabilization of pelvic ring injuries: a retrospective analysis of risk factors and a meta-analysis of similar studies

PURPOSE

Pelvic ring fractures requiring surgical stabilization are severe injuries. Surgical site infections occurring after stabilization of the pelvis are serious complications, requiring complex and multidisciplinary treatment.

METHODS

This is a retrospective observational study from a level I trauma centre. One hundred and ninety-two patients who underwent stabilization of closed pelvic ring injuries without signs of pathological fracture were selected for inclusion into the study. After excluding seven patients for having incomplete data, the final study group consisted of 185 patients (117 men and 68 women). Basic epidemiologic data and potential risk factors were recorded and analyzed by Cox regression, Kaplan-Meier curves, and risk ratios in 2 × 2 tables. Categorical variables were compared by Fisher exact tests and chi squared tests. Parametric variables were analyzed with Kruskal-Wallis tests with post hoc Wilcoxon tests.

RESULTS

Surgical site infections occurred in 13% of the study group (24 from 185). Eighteen infections occurred in men (15.4%) and six in women (8.8%). There were two significant risk factors in women: age over 50 years (p = 0.0232) and concomitant urogenital trauma (p = 0.0104). The common risk ratio for both these factors was 212.59 (8.78-5148.68), p = 0.0010. No significant risk factors were identified in men despite younger men having a higher incidence of infection (p = 0.1428).

CONCLUSION

Overall rate of infectious complications was higher than in the literature, but this might be caused by inclusion of all patients regardless of surgical strategy. Higher age in women and lower age in men were associated with higher infection rates. Concomitant urogenital trauma was a significant risk factor in women.

Posterior pelvic ring injury of straddle fractures: Incidence, fixation methods, and clinical outcomes

Straddle fracture, a superior and inferior ramus fracture of both sides, is generally treated conservatively. However, posterior pelvic ring injury is often associated with straddle fracture, leading to unstable pelvic bone fracture that requires surgical treatment. The present study reports the clinical and radiological outcomes of straddle fracture with posterior pelvic ring injury. This study included 73 patients (41 men, 32 women) with a straddle fracture injury. The injury mechanism, injury severity score (ISS), accompanying injuries, presence of posterior pelvic ring injury, and fixation methods for the pelvic fracture were analyzed, and outcomes were evaluated functionally and radiologically. Of the 73 patients, 56 (77%) had a posterior pelvic ring injury and 7 died. In 43 patients, the posterior pelvic ring injuries constituted unstable pelvic injury and were treated surgically. The fixation method was determined based on the severity of the posterior pelvic injury. The patients' mean ISS was 24.7 points. Radiological evaluation of surgical outcomes in 43 patients revealed the outcomes as anatomic in 20, nearly anatomic in 14, moderate in 5, and poor in 4, whereas functional evaluation revealed the outcomes as excellent in 21, good in 9, fair in 7, and poor in 6. Posterior pelvic ring fracture can accompany straddle fractures, which may lead to pelvic injury instability. Thus, special attention is required for patients with a straddle fracture.

Radiological measurement of pelvic fractures using a pelvic deformity measurement software program

BACKGROUND

It is difficult for the surgeon to measure pelvic displacement in the closed reduction operation for unstable pelvic fracture. We therefore developed a pelvic deformity measurement software program based on standardized radiographs. The objectives of the present study were to evaluate the inter-observer reliability of the program for measuring specific fracture types on preoperative pelvic films and to assess the validity of the measurement software program by comparing it with a gold standard.

METHODS

Twenty-five patients diagnosed with AO/OTA type B or C pelvic fractures with the unilateral pelvis fractured and dislocated were included in this study. Four separate observers repeatedly determined the translational and rotational patterns and outcomes using the software program and hand measurement, and calculated the displacement using computed tomography (CT) coupled with a three-dimensional (3D) CT model. The validity of the measurement software was calculated by assessing the consistency between the software measurements and the gold standard. Additionally, inter-observer reliability was assessed for the software. The software was also applied in preliminary clinical practice for closed reduction procedures.

RESULTS

The overall inter-observer reliabilities of the software program, CT coupled with 3D reconstruction, and hand measurements were high, with kappa values of 0.956, 0.958, and 0.853, respectively. The software showed validity similar to that of CT coupled with 3D reconstruction (0.939 vs. 0.969), and better than that of hand measurement (0.939 vs. 0.858). A preliminary clinical application demonstrated that the software is effective for guiding closed reduction of pelvic fractures.

CONCLUSIONS

Our newly established pelvic deformity measurement program is a reliable and accurate tool for analyzing pelvic displacement patterns and can be used for guidance of closed reduction and planning of the reduction pathway.

LEVEL OF EVIDENCE

III.

Effectiveness and complications of primary C-clamp stabilization or external fixation for unstable pelvic fractures

BACKGROUND AND PURPOSE

Unstable pelvic fractures frequently require emergency stabilization using a C-clamp or external (CC/EF) fixation. However, the effectiveness of this intervention and associated complications are still a matter of debate.

PATIENTS AND METHODS

The analysis used data available from the German Pelvic Trauma Registry to study general complications, infections and mortality after primary stabilization using CC/EF in 5,499 patients (n = 957 with vs n = 4,542 without). Furthermore, the subgroups with secondary surgery (n = 713 vs n = 1,695), and ilio-sacral screw implantation following C-clamp stabilization were evaluated (n = 24 vs n = 219). Calculated odds ratios were adjusted for potential confounders.

RESULTS

Patients treated by CC/EF were younger (45 ± 20 vs 62 ± 24 years), had more C-type fractures (65% vs 28%), higher ISS (≥25 63% vs 20%) and displacement (≥3 mm 81% vs 41%), and more complex fractures (32% vs 5%). These features were independent risk factors for complications (p < 0.001). While mortality was reduced after CC/EF stabilization by 32% (OR 0.68 95%CI 0.49-0.95), the risk for general complications was slightly increased (OR 1.25 95% CI 1.02-1.53). In patients undergoing secondary surgery, CC/EF fixation had no influence on mortality, general complications or infections. Related to preceding C-clamp stabilization (OR 4.67 95% CI 1.06-20.64), the risk for infection increased from 3.2% to 20.8% in ilio-sacral screw fixation.

INTERPRETATION

Primary stabilization of unstable pelvic fractures with C-clamp or external fixation is associated with a decreased mortality and was not an independent risk factor for complications after secondary surgery. However, the risk for infection after ilio-sacral screw fixation increased almost 5-fold after C-clamp use.

Strategies for the management of hemodynamically unstable pelvic fractures: From preperitoneal pelvic packing to definitive internal fixation

BACKGROUND/OBJECTIVE

Preperitoneal pelvic packing is useful, and favorable treatment outcomes have been reported. However, the timing of subsequent internal fixation of the pelvis is still debatable. We report the outcomes of a study on patients that underwent internal fixation after preperitoneal packing.

METHODS

A retrospective review was performed for patients with hemodynamically unstable pelvic fracture who underwent preperitoneal pelvic packing and internal fixation. Patients who underwent internal fixation with simultaneous packing removal were placed in Group 1. Patients who underwent definitive internal fixation later were placed in Group 2.

RESULTS

Of the 56 patients (mean age 44.7 years), 36 were male. The mean time from injury to internal fixation was 1.3 (1-2) days and 5.6 (3-10) days in Group 1 and 2, respectively. There was a significant difference in the mean duration of stay in the intensive care unit: 10.9 (3-54) days in Group 1 vs. 14.4 (5-43) days in Group 2 (p = 0.019). Thirty-one cases of complications occurred among 14 patients (25%), including six cases of surgical site infection. Among the six cases of infection, four were superficial and two were deep; five of these cases occurred in Group 2, including both cases of deep infection (p = 0.013).

CONCLUSION

Performing internal fixation with packing removal should aid the return of the patient to a stable state, as it is possible to utilize the same incision line used for the original packing procedure, while providing stability to the pelvis.

Predictors of Unplanned Reoperation After Operative Treatment of Pelvic Ring Injuries

OBJECTIVES

To evaluate the incidence of unplanned reoperations after pelvic ring injuries and to develop a risk prediction model.

DESIGN

Retrospective review.

SETTING

Level I Trauma Center.

PATIENTS

The medical records of 913 patients (644 male and 269 female patients; mean age, 39 years; age range, 16-89 years) with unstable pelvic ring fractures operatively treated at our center from 2003 to 2015 were reviewed.

INTERVENTION

Multiple logistic regression analysis was conducted to evaluate the relative contribution of associated clinical parameters to unplanned reoperations. A risk prediction model was developed to assess the effects of multiple covariates.

MAIN OUTCOME MEASUREMENTS

Unplanned reoperation for infection, fixation failure, heterotopic ossification, or bleeding complication.

RESULTS

Unplanned reoperations totaled 137 fractures, with an overall rate of 15% (8% infection, 6% fixation failure, <1% heterotopic ossification, and <1% bleeding complication). Reoperations for infection and fixation failure typically occurred within the first month after the index procedure. Four independent predictors of reoperation were open fractures, combined pelvic ring and acetabular injuries, abdominal visceral injuries, and increasing pelvic fracture grade. No independent association was shown between reoperation and patient, treatment, or other injury factors.

CONCLUSIONS

Unplanned reoperations were relatively common. Infection and fixation failure were the most common indications for unplanned reoperations. Factors associated with reoperation are related to severity of pelvic and abdominal visceral injuries. Our findings suggest that these complications might be inherent and in many cases unavoidable despite appropriate current treatment strategies.

LEVEL OF EVIDENCE

Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

Updated Outcomes of Early Endoscopic Realignment for Pelvic Fracture Urethral Injuries at a Level 1 Trauma Center

OBJECTIVE

To present our updated experience and discuss potential benefits of early endoscopic realignment (EER) for patients with pelvic fracture urethral injuries (PFUIs).

METHODS

A retrospective review of patients treated with EER after blunt PFUIs was performed. EER was performed with a retrograde or a combined antegrade or retrograde approach with a cystoscope. Treatment success was defined as no secondary procedure or the ability to pass a cystoscope across the area of injury or surgical anastomosis.

RESULTS

Thirty-two patients (mean age 38 years, range 17-73) underwent EER between 2004 and 2016 with a mean follow-up of 26 months (range 1-102). Median time to realignment was 2 days (range 0-6) and was performed concomitantly with another surgical service in 72% of cases. Median operative time for EER was 38 minutes (range 8-100). Using an intent-to-treat analysis, 29 patients (91%) failed EER. Nine patients underwent a subsequent endoscopic procedure with 22% success rate. Excision and primary anastomotic urethroplasty was performed in 24 patients as a primary or secondary treatment with 96% success rate.

CONCLUSION

Our overall success rate for EER was 9%, but did not hinder subsequent urethroplasty success. The decision for performing EER should not be based on success alone. Secondary benefits of EER exist and may assist with the multidisciplinary care of a patient with complex trauma. The management of PFUI is challenging and these patients should be referred to tertiary centers.