Staged reconstruction of pelvic ring disruption: differences in morbidity, mortality, radiologic results, and functional outcomes between B1, B2/B3, and C-type lesions

Recovery after neurologic injury in operative acetabular and pelvic fractures: Defining the natural history of foot drop

INTRODUCTION

Dorsiflexion weakness, or footdrop, is a well-described sequela of high-energy acetabular and pelvic trauma, but little data exists describing the factors related to neurologic recovery and the timeline therein. An improved understanding of these factors would facilitate prognostication, patient education, and treatment decision-making. The aim of this study was to compare neurologic recovery between acetabular and pelvic fractures, delineate factors associated with recovery, and determine the expected timeline of recovery.

METHODS

A retrospective chart review was conducted at a level 1 tertiary referral center from 2000 to 2021 using CPT codes and keyword search functions to identify adult patients with neurologic injury in the setting of operative acetabular and/or pelvic ring trauma. Patients were included if they had documented, graded weakness not clearly explained by a concomitant injury (extremity or spine) following a pelvic/acetabular injury. Patients were followed to a minimum of 6 months follow-up or to neurologic recovery. Primary outcomes were the presence of motor recovery and time to initial and maximum recovery. The contributions of injury type and initial neurologic status were analyzed using logistic regression for impact on neurologic recovery.

RESULTS

We identified 121 patients with neurologic injury and resultant footdrop in the setting of an operative pelvic ring or acetabular fracture. From this cohort, 58 patients (47.9 %) demonstrated some degree of neurologic recovery in follow-up. There was no difference in recovery when comparing injury type (pelvis vs. acetabulum). Any motor function (including flicker) at time of initial evaluation was predictive of recovery (OR 6.18, [2.00 - 19.14]; p = 0.002). Initial neurologic function also correlated with more rapid recovery in comparison to patients with initial absent neurologic function both in time to initial recovery (56 days vs 107 days; p = 0.016) and time to maximum recovery (153 days vs 241 days; p = 0.027).

CONCLUSIONS

These results highlight the relatively poor prognosis for neurologic recovery in operative pelvic and acetabular injuries. Any initial neurologic function is predictive of likelihood of neurologic recovery and correlates with a more expedient neurologic recovery. Ultimately, this enables providers to better educate patients and facilitates decisions regarding further intervention.

Comparison of the AO/OTA 1996/2007 and 2018 pelvic ring fracture classifications

Pelvic ring fractures may present with relevant mechanical and haemodynamic instability. Classifications of the bony or ligamentous injuries of the pelvic ring are well established. The most common classifications used analyse the injury mechanisms and the resulting instability of the pelvic ring structure. Fracture classifications should be simple and easy to use, comprehensive, and radiographically and anatomically based, resulting in a hierarchical alphanumeric order of types and subtypes and thereby allow adequate treatment decisions based on a high degree of inter- and intraobserver reliability. In 2018 a new AO/OTA pelvic ring fracture and dislocation classification was published that combined the most commonly used "historical" classification schemes, e.g. the Tile/AO classification and the classification according to Young and Burgess. Compared with these older classifications, several relevant changes were integrated in the 2018 edition. The changes between the AO/OTA 1996/2007 and 2018 classifications were analysed in detail. Overall, several problems were identified regarding the type-B pelvic ring injury classification. These changes may result in difficulties in classifying pelvic ring injuries and thereby prevent relevant comparisons between former and future clinical studies on pelvic injuries.Level of Evidence: V.

Comparison of clinical and radiographic outcomes of bilateral versus unilateral ramus fixation in straddle fractures with posterior pelvic ring injury

INTRODUCTION

Superior and inferior ramus fractures, termed straddle fractures, are high-energy fractures often accompanied by unstable pelvic ring injuries. However, consensus is lacking regarding indications for surgical treatment or fixation methods. We aimed to compare clinical and radiological outcomes of unilateral ramus fixation (URF) and bilateral ramus fixation (BRF) for straddle fractures with unilateral posterior pelvic ring injuries.

MATERIALS AND METHODS

We enrolled 118 patients (73 males, 45 females; mean age, 47 years) diagnosed with straddle fractures between March 2015 and December 2021 with > 1 year of follow-up. Patients were divided into URF (n = 60) and BRF (n = 58) groups based on the anterior pelvic ring fixation method. Preoperative factors including body mass index, diabetes, smoking, injury mechanism, injury severity score, American Society of Anesthesiologists classification system, Tile classification, and Young and Burgess classification were compared. Intraoperative blood loss, operation time, postoperative bone union rate, complications, and the need for additional surgeries were analyzed.

RESULTS

There were no statistically significant preoperative differences between the two groups. However, the URF group showed a significantly lower mean operative time and blood transfusion requirement (63 min and 2 units, respectively) than the BRF group (104 min and 3 units, respectively) (both p < 0.001). Postoperatively, bone union was achieved in 57 (95.0%) and 56 (96.6%) patients in the URF and BRF groups, respectively. Complications occurred in 17 (28.3%) and 14 (24.1%) patients in the URF and BRF groups, respectively, with additional surgeries needed in 3 (5.0%) patients in the URF group and 2 (3.4%) patients in the BRF group.

CONCLUSIONS

Unilateral anterior fixation can provide sufficient stability and clinical effectiveness in the surgical treatment of straddle fractures in areas with posterior pelvic ring injuries. Compared with bilateral anterior fixation, unilateral fixation significantly reduces operation time and blood loss, making it a viable fixation method for straddle fractures.

Long-Term Follow-Up after Iliosacral Screw Fixation of Unstable Pelvic Ring Fractures

(1) Background: High-energy injuries of the pelvic ring are rare. The wide application of iliosacral screw fixation of the posterior pelvic ring is relatively new. The aim of the present study was to evaluate the long-term quality of life. (2) Methods: All patients treated with an iliosacral screw for a posterior pelvic ring stabilization after high-energy trauma at a level 1 trauma center between 2005 and 2015 were included. Pelvic ring injuries were classified according to the Tile classification adapted by AO/ASIF. The clinical evaluation included the patient-oriented questionnaires surveys of the Majeed Score, Iowa Pelvic Score (IPS), Work Ability Index (WAI), SF-36, EQ5D-5L. (3) Results: A total of 84 patients were included with a median follow-up of 130.1 months (IQR 95.0-162.0 months). The median ISS was 22.5 (IQR 16.0-29.0), mean Majeed Score 83.32 (SD ± 19.26), IPS 77.88 (SD ± 13.96), WAI 32.71 (SD ± 11.31), SF-36 PF 71.25 (SD ± 29.61) and EQ5D-5L 0.83 (SD ± 0.21). There was a notably difference between uni- and bilateral pelvic fractures (p = 0.033) as well as a correlation with the ISS (p = 0.043) with inferior functional outcome measured by IPS. (4) Conclusions: Long-term follow-up of iliosacral screw fixation of unstable pelvic ring fractures showed a good quality of life and functional outcome with equal EQ5D-5L results and inferior SF-36 physical functioning compared to the German population.

Quality of Life from Return to Work and Sport Activities to Sexual Dysfunction after Surgical Treatment of Pelvic Ring Fractures

BACKGROUND

Pelvic ring fractures are life-threatening injuries that have a severe impact on patients' lives. The aim of this clinical study was to evaluate the outcome of surgical treatment in terms of Quality of Life (QoL), return to work, functional results and sport activities, and post-operative sexual dysfunction.

METHODS

A retrospective study with patients retrieved from a Level 1 Trauma Center was performed. Minimum patient follow-up was 12 months: QoL was evaluated with the SF-12 (Short Form Survey) questionnaire, return to work with the Workplace Activity Limitation Survey (WALS), functional outcomes and sport activities with the Harris Hip Score and Tegner activity score, respectively, and sexual function damage with a 0-10 NRS.

RESULTS

Seventy-six patients (41 males and 35 females) were enrolled, with a mean age at surgery of 56.4 years (18-89 years). Overall, their quality of life remained significantly affected, with male patients reporting worse WALS outcomes (p = 0.036), sexual damage (p = 0.001), and SF-12 Bodily Pain (p = 0.046) than females. In particular, 70.7% of men and 45.7% of women reported sexual limitations, and only 53.7% returned to their job, with 35.2% losing their job as a consequence of the pelvic ring disruption.

CONCLUSIONS

An important deterioration in general health state, return to work, and sexual function was documented in patients treated surgically for pelvic trauma, especially in male patients. There are disabling secondary sequels at all levels beyond the mere functional scores, and both patients and clinicians should be aware and have the correct expectations.

Combined anterior and posterior ring fixation versus posterior ring fixation alone in the management of unstable Tile B and C pelvic ring injuries: A randomized controlled trial

PURPOSE

Combined anterior and posterior ring (APR) fixation is classically performed in Tile B2 and C1 injuries to achieve superior biomechanical stability. However, the posterior ring (PR) is the main weight bearing portion that is responsible for weight transmission from the upper parts of the body to the lower limbs through the sacrum and the linea terminalis. It is hypothesized that isolated PR fixation can achieve comparable radiological and clinical outcomes to APR fixation. Therefore, we conducted this study to compare the two fixation principles in managing Tile B2 and C1 injuries.

METHODS

Our study included 20 patients with Tile B2 injuries and 20 patients with Tile C1 injuries. This study was a randomized control single-blinded study via computerized random numbers with a 1:1 allocation by using random block method. The study was performed at a level one trauma center. A total of 40 patients with Tile B2 and C1 injuries underwent combined APR or isolated PR fixation (Group A and B, respectively). Matta & Tornetta radiological principles and Majeed pelvic scoring system were used for the assessment of primary outcomes and postoperative complications. Secondary outcomes included operative time, amount of blood loss, intraoperative assessment of reduction, need of another operation, length of hospital stay, ability to weight bear postoperatively and pain control metrics. We used student t-test to compare the difference in means between two groups, and Chi-square test to compare proportions between two qualitative parameters. We set the confidence interval to 95% and the margin of error accepted to 5%. So, p ≤ 0.05 was considered statistically significant.

RESULTS

The mean follow-up duration was 18 months. The operative time (mean difference 0.575 h) and the intraoperative blood loss (mean difference 97.5 mL) were lower in Group B. Also, despite the higher frequency of rami displacement before union in the same group, there were no significant differences in terms of radiological outcome (excellent outcome with OR = 2.357), clinical outcome (excellent outcome with OR = 2.852) and postoperative complications assessment (OR = 1.556) at last follow-up.

CONCLUSION

The authors concluded that isolated PR fixation could favorably manage Tile B2 and C1 pelvic ring injuries with Nakatani zone II pubic rami fractures and intact inguinal ligament. Its final radiological and clinical outcomes and postoperative complications were comparable to combined APR fixation, but with less morbidity (shorter operation time, lower amount of blood, and no records of postoperative wound infection).

Management of Open Tile C Pelvic Fractures and Their Outcomes: A Retrospective Study of 30 Cases

Background

Open Tile C pelvic fractures are particularly severe. However, reports on their management and outcomes are relatively rare. This study analyzed the demographic and clinical characteristics of patients with open Tile C pelvic fractures and describes our management and outcomes of these injuries.

Methods

This retrospective review included all patients with open Tile C pelvic fractures treated in our department between January 2014 and June 2021. Data on patient demographics, characteristics of the injuries, surgical management, and outcomes were analyzed.

Results

Thirty patients with a mean age of 34.0 years met the diagnostic criteria. The average Injury Severity Score was 40.3. According to the Tile fracture classification, 6 patients sustained type C1.1, 12 sustained type C1.2, 3 sustained type C1.3, 5 sustained C2 and 4 sustained type C3. Most patients had soft tissue injuries in multiple zones. All patients sustained associated injuries. Management consisted of bed rest in 8 cases, external fixation as the final strategy in 14, conversion from external fixation to internal fixation in 3, open reduction with internal fixation in 5, and amputation in 6. The average amount of packed red blood cells transfused was 33.3 units, the average intensive care unit stay was 11.3 days, the mean number of operations required was 6.2, and the mean length of hospital stay was 81.8 days. The main complications were early soft tissue infections and venous thrombosis. One patient died of sepsis and multi-organ failure. Soft tissue injuries in multiple zones increased utilization of hospital resources whereas anorectal injuries did not. Vascular damage accompanying truck crush injuries had a high amputation rate.

Conclusion

Open Tile C pelvic fractures require multidisciplinary diagnosis and management and consume considerable hospital resources. More emphasis needs to be placed on this complex injury.

Morphological Asymmetry of Pelvic Rings: A Study Based on Three-Dimensional Deviation Analysis

OBJECTIVE

To evaluate the morphological asymmetry of pelvic rings existing in healthy individuals in terms of three-dimensional (3D) geometric shapes.

METHODS

This study was a retrospective self-control study. CT images of healthy pelvises, scanned from Jan 2014 to Jan 2019, were taken from 159 subjects (88 males and 71 females) aged 20 to 59 years (39.1 ± 8.7 years). Digital pelvic ring models were reconstructed from CT images and then flipped over the corresponding sagittal planes to obtain their mirrored models. A 3D deviation analysis of a pelvic ring was conducted between the original model and its mirrored model via model registration and quantification of the geometric differences. Next, the pelvic rings were split to the left and right hipbones. The same flipping procedures as done by pelvic rings were performed for left hipbones to obtain their mirrored models. A 3D deviation analysis was also performed between the left and right hip bones. Quantitative variables representing deviation mainly included the average deviation (AD) and the maximum deviation (MD). MDs over 4 mm and 10 mm were deemed as critical levels for evaluating the severity of asymmetry as per Matta's scoring system. The quantitative assessments of the asymmetry covered pelvic rings, bilateral hip bones and the specific anatomic regions of a hip bone.

RESULTS

157 out of 159 pelvic rings (98.74%) had more than 4 mm of the MD and 27 (16.98%) of them exceeded 10 mm of the MD. The MD of pelvic rings was 1.23 times as high as that for the bilateral hip bones (7.46 mm vs. 6.08 mm, P < 0.05). The ADs of pelvic rings and bilateral hip bones were 1.28 mm and 0.94 mm, respectively (P < 0.05); 2.27% of the surface points of a pelvic ring had more than 4 mm geometric deviations compared with its mirrored model, while 0.59% (P < 0.05) of bilateral hip bones were on the same level of deviation. 119 out of 159 pelvic iliac crests (74.8%) had MDs more than 4 mm, and 15 (9.4%) reached 10 mm or more. Only 15 (9.4%) pelvises presented asymmetric features in the area of obturator foramen where the MDs exceeded 4 mm.

CONCLUSIONS

Pelvic asymmetry exists in the general population, but 3D geometric symmetry is present in specific anatomic regions. It implies that restoring the 3D symmetry of specific anatomic regions is more reliable than "restoring the symmetry of pelvic ring" in pelvic ring reduction or pelvic fixation design.

Pelvic Ring Injury Mortality: Are We Getting Better?

OBJECTIVES

To determine if changes in pelvic trauma care and treatment protocols have affected overall mortality rates after pelvic ring injury.

DESIGN

Retrospective cohort study.

SETTING

Level I trauma center.

PATIENTS/PARTICIPANTS

A total of 3314 patients with pelvic ring injuries who presented to a single referral center from 1999 to 2018 were included in the study.

INTERVENTION

Pelvic ring management, years 1999-2006 versus years 2007-2018.

MAIN OUTCOME MEASUREMENTS

In hospital mortality. Other examined variables included change in patient demographics, fracture characteristics, date of injury, associated injuries, length of hospital stay, Abbreviated Injury Severity Score.

RESULTS

The composite mortality rate was 6.5% (214/3314). The earliest cohort presented a mortality rate of 9.1% [111/1224; 95% confidence interval (CI), 7.6%-10.8%] compared with the more recent cohort mortality rate of 4.9% (103/2090; 95% CI, 4.1%-5.9%). Overall mortality was significantly lower in the more recent period, a risk difference of 4.1% (95% CI, 2.3%-6.1%; P < 0.01). After adjusting for age and Abbreviated Injury Severity Score of the brain, chest, and abdomen, the mortality reduction was more pronounced with an adjusted risk difference of 6.4% (95% CI, 4.7%-8.1%; P < 0.01).

CONCLUSION

Significant improvement in the mortality rate of pelvic ring injuries has been demonstrated in recent years (4.9% vs. 9.1%) and the difference is even large when accounting for known confounders. Improvement appears to coincide chronologically with changes in trauma resuscitation and implementation of adjuvant treatments for managing patients with severe hemorrhagic shock. Although the exact benefit of each treatment awaits further research, these data might indicate improved care over time for these difficult patients.

LEVEL OF EVIDENCE

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

Management and outcomes of open pelvic fractures: An update

BACKGROUND

Open pelvic fractures remain challenging in terms of their management. The purpose of this narrative review was to evaluate the latest advances made in the management of these injuries and report on their clinical outcome.

PATIENTS AND METHODS

A literature review was undertaken focusing on studies that have been published on the management of open pelvic fractures between January 2005 and November 2019. Information extracted from each article include demographics, mechanism of injury, injury severity score (ISS), classification of pelvic ring fracture, classification of open soft tissue, specific injury zone classification, number of cases with hemodynamic instability, number of cases that received blood transfusions, amount of packed red blood cells transfused during the first 24 h, number of cases with anorectal trauma, urogenital injury, number of fecal diversional colostomies and laparotomies, angiographies and embolization, preperitoneal pelvic packings, length of stay in intensive care unit (ICU) and in hospital, and mortality.

RESULTS

Fifteen articles with 646 cases formed the basis of this review. The majority of patients were male adults (74.9%). The mean age was 35.1 years. The main mechanism of injury was road traffic accidents, accounting for 67.1% of the injuries. The mean ISS was 26.8. A mean of 13.5 units of PRBCs were administered the first 24 h. During the whole hospital stay, 79.3% of the patients required blood transfusions. Angiography and pelvic packing were performed in a range of 3%-44% and 13.3%-100% respectively. Unstable types of pelvic injuries were the majority (72%), whilst 32.7% of the cases were associated with anorectal trauma, and 32.6% presented with urogenital injuries. Bladder ruptures were the most reported urogenital injury. Fecal diversional colostomy was performed in 37.4% of the cases. The mean length of ICU stay was 12.5 days and the mean length of hospital stay was 53.0 days. The mean mortality rate was 23.7%.

CONCLUSION

Mortality following open pelvic fracture remains high despite the evolution of trauma management the last 2 decades. Sufficient blood transfusion, bleeding control, treatments of associated injuries, fracture fixation and soft tissue management remain essential for the reduction of mortality and improved outcomes.

The FFP-classification: From eminence to evidence

Fragility fractures of the pelvis (FFP) are a clinical entity with a rapidly growing incidence among elderly women. The characteristics of these fractures are different from those appearing after high-energy trauma. In 2013, the comprehensive FFP-classification provided a new framework for analysis of these fractures. It is based on the estimation of loss of stability in the pelvic ring. It is connected with recommendations for surgical treatment, justified by the fact that higher instabilities will need surgical stabilization. Since ist appearance, we can observe an increasing clinical-scientific interest in FFP. Multiple publications use the FFP-classification studying the characteristics of fractures, choice of treatment and outcome. Other studies focus on minimal-invasive techniques for stabilization. The actual knowledge describes higher mortality rates as the reference population, lower mortality rates after operative treatment but for the price of surgery-related complications. Mobility, independency and quality of life are worse than before the fracture, independent of the FFP-classification and the type of treatment. The classification triggered a rapid increase of expertise. This publication gives a detailed overview on the evolution from eminence to evidence.

A Modified Triangular Osteosynthesis Protocol for the Rod and Pedicle Screw Fixation of Vertical Unstable Sacral Fractures

BACKGROUND

The stabilization of vertical unstable sacral fractures has been a complex problem that is a challenge to current standard approaches. Here, we attempted to evaluate a modified technique for sacral fractures.

METHODS

In the modified triangular osteosynthesis technique, we adopted a vertical and transverse fixation with a rod and pedicle screw system to reduce and fix sacral fractures in 28 subjects. The postsurgery effect of this technique was evaluated by physical examination and radiography.

RESULTS

In the postoperative day 1, the patients were able to move body position passively from the lateral side to supine and exercise their legs by themselves. After a follow up of 20 months, radiological evaluation showed that fracture fragment reduction was excellent in 18 (64%), good (displacement 5-10 mm) in 8 (29%), and fair (displacement 10-15 mm) in 2 (7%) patients. Three patients with a preoperative perineal neurological impairment had a complete recovery after surgical decompression. All patients had achieved bone union of fractures, and no loss of fracture reduction was detected.

CONCLUSIONS

The modified procedures offered an easier approach to fix vertical unstable sacral fractures, thereby achieving quicker and stable functionality. This suggests an alternative approach to manage unstable sacral fractures.

LEVEL OF EVIDENCE

4.

CLINICAL RELEVANCE

The stabilization of vertical unstable sacral fractures has been a complex problem that is a challenge to current standard approaches. We attempted to introduce a modified technique for sacral fractures.

Pelvic and acetabular trauma in amateur equestrian enthusiasts - A retrospective review

INTRODUCTION

Horse riding related accidents can present with devastating pelvic and acetabular fractures. This study examines the nature, management and treatment outcomes of severe pelvic and acetabular trauma in amateur horse riders presenting to a national tertiary referral centre. We also aim to define certain at-risk groups.

METHODS

This was a retrospective descriptive cohort of all patients who were referred to the National Centre for Pelvic and Acetabular trauma resulting from horse riding accidents. All patients who were referred to the National Centre for Pelvic and Acetabular Trauma between January 2018 and July 2020 were included. Professional horse riders were excluded. Clinical and treatment outcome measures were stratified to four different mechanisms of injury: fall from horse (FFH), horse crush (HC), Horse Kick (HK) and Saddle Injury (SI).

RESULTS

There were 31 equestrian related injuries referred to our centre between January 2018 and July 2020. One patient was a professional jockey and was thus excluded from the study. Eighteen were female and the mean age at referral was 37 years old. The majority of these were pelvic ring injuries (73%). Fifty per cent of patients required surgical intervention and the majority of these were male.

CONCLUSION

Horse riding is a potentially dangerous recreational pursuit with significant risk of devastating injury. Pelvic and acetabular fractures secondary to horse riding are frequently associated with other injuries and the need operative intervention is common in this group. Young women and older men are higher risk groups.

Interobserver and intraobserver agreement for Letournel acetabular fracture classification system using 3-dimensional printed solid models

BACKGROUND

Acetabular fractures pose diagnostic and surgical challenges. They are classified using the Judet-Letournel system, which is based solely on X-ray. However, computed tomography (CT) imaging is now more widely utilized in diagnosing these injuries. The emergence of 3-dimensional (3-D) printing technology in varying orthopedic fields has provided surgeons a solid model that improves their spatial understanding of complex fractures and ability to plan pre-operatively.

AIM

To evaluate the reliability of the Judet-Letournel classification system of acetabular fractures, when using either CT imaging or 3-D printed models.

METHODS

Seven patients with acetabular fractures underwent pelvic CT imaging, which was then used to create solid, 3-D printed models. Eighteen orthopaedic trauma surgeons responded to questionnaires regarding fracture classification and preferred surgical approach. The same questionnaire was completed using only CT imaging, and two weeks later, using only 3-D printed models. The inter- and intra-observer agreement rates were then analyzed.

RESULTS

Inter-observer agreement rates based on CT imaging or 3-D printed models were moderate for fracture classification: κ = 0.44, κ = 0.55, respectively (P < 0.001) and fair for preferred surgical approach: κ = 0.34, κ = 0.29, respectively (P < 0.005). Intra-observer agreement rates for fracture classification and preferred surgical approach comparing CT imaging or 3-D printed models were moderate: κ = 0.48, κ = 0.41, respectively. No significant difference in intra-observer agreement was detected when comparing orthopedic pelvic specialists to general orthopedic traumatologists.

CONCLUSION

The Judet-Letournel classification demonstrated only moderate rates of agreement. The use of 3-D printed models increased the inter-observer agreement rates with respect to fracture classification, but decreased it with respect to the preferred surgical approach. This study highlights the role of 3-D printed models in acetabular fractures by improving spatial understanding of these complex injuries, thus providing more reliable fracture diagnoses and alternative viewpoints for pre-operative planning.

Factors affecting quality of life after pelvic fracture

INTRODUCTION

Functional outcome and health-related quality of life (HRQOL) after pelvis fracture is suboptimal; majority of the patients do not return to their preinjury activities. Many researchers reported that late morbidity in pelvis fracture is associated with severity of the fracture, associated trauma, pelvic fracture-related complications and methods of treatment.

MATERIAL AND METHODS

One hundred and twelve patients with pelvis fracture who were treated either conservatively (n = 88) or surgically (n = 24) with a minimum of two years follow up were evaluated clinically and radiologically. The clinical outcome was evaluated using Majeed score and self-reported Short Musculoskeletal Function Assessment (SMFA). Their HRQOL was evaluated using the 36-item Short Form Survey (SF-36) and WHOQOL-BREF questionnaires. The fracture-displacement in the anterior or posterior pelvis ring was measured from the anteroposterior radiograph or inlet/outlet view.

RESULTS

The average Majeed score was 76.65 ± 14.73 (range, 36 to 96). There were 81 patients with good to excellent outcomes and 31 patients with poor to fair outcomes. The average SF-36 Physical Component Summary (PCS) score was 47.71 ± 7.88 (range, 27.3 to 61.5) and SF-36 Mental Component Summary (MCS) was 49.20 ± 9.37 (range, 23.1 to 56.8). The functional level of the general population in the physical and mental domain was achieved in 48.23% and 65.3% of pelvic-fractured patients respectively. General population norms were achieved in 56.3%, 63.4%, 65.2% and 84.8% of patients in WHOQOL-BREF domain one, two, three and four respectively. The patients had significantly worse functional outcome and HRQOL if residual displacement was > 1 cm. Age, sex, associated injuries and injury mechanism were not affecting the HRQOL in patients with acceptable residual displacement of ≤ 1 cm.

CONCLUSION

Pelvic fracture with the residual displacement of ≤ 1 cm in the sacroiliac joint/symphysis pubis result in better functional outcome and HRQOL. Injury mechanism and associated injury have no impact on the HRQOL if the residual displacement is within the acceptable limit.

Interobserver reliability of the Tile classification system for pelvic fractures among radiologists and surgeons

OBJECTIVES

To assess the interobserver reliability (IOR) of the Tile classification system, and its potential influence on outcomes, for the interpretation of CT images of pelvic fractures by radiologists and surgeons.

METHODS

Retrospective data (1/2008-12/2016) from 238 patients with pelvic fractures were analyzed. Mean patient age was 44 years (SD 20); 66% were male. There were 54 Tile A, 82 Tile B, and 102 Tile C type injuries. The 30-day mortality rate was 15% (36/238). Six observers, three radiologists, and three surgeons with different levels of experience (attending/resident/intern) classified each fracture into one of the 26 second-order subcategories of the Tile classification. Weighted kappa coefficients were used to assess the IORs for the three main categories and nine first-order subcategories.

RESULTS

The overall IORs of the Tile system for the main categories and first-order subcategories were moderate (kappa = 0.44) and fair (kappa = 0.31), respectively. IOR was fair to moderate among radiologists, but only fair among surgeons. By level of training, IOR was moderate between attendings and between residents, whereas it was only fair between interns. IOR was moderate to substantial (kappa = 0.56-0.70) between the radiology attending and resident. Association of the Tile fracture type with 30-day mortality was present based on two out of six observer ratings.

CONCLUSIONS

The overall IOR of the Tile classification system is only fair to moderate, increases with the level of rater experience and is better among radiologists than surgeons. In the light of these findings, results from studies using this classification system must be interpreted cautiously.

KEY POINTS

• The overall interobserver reliability of the Tile pelvic fracture classification is only fair to moderate. • Interobserver reliability increases with observer experience and radiologists have higher kappa coefficients than surgeons. • Interobserver reliability has an impact on the association of the Tile classification system with mortality in two out of six cases.

Deep learning evaluation of pelvic radiographs for position, hardware presence, and fracture detection

PURPOSE

Recent papers have shown the utility of deep learning in detecting hip fractures with pelvic radiographs, but there is a paucity of research utilizing deep learning to detect pelvic and acetabular fractures. Creating deep learning models also requires appropriately labeling x-ray positions and hardware presence. Our purpose is to train and test deep learning models to detect pelvic radiograph position, hardware presence, and pelvic and acetabular fractures in addition to hip fractures.

MATERIAL AND METHODS

Data was retrospectively acquired between 8/2009-6/2019. A subset of the data was split into 4 position labels and 2 hardware labels to create position labeling and hardware detecting models. The remaining data was parsed with these trained models, labeled based on 6 "separate" fracture patterns, and various fracture detecting models were created. A receiver operator characteristic (ROC) curve, area under the curve (AUC), and other output metrics were evaluated.

RESULTS

The position and hardware models performed well with AUC of 0.99-1.00. The AUC for proximal femoral fracture detection was as high as 0.95, which was in line with previously published research. Pelvic and acetabular fracture detection performance was as low as 0.70 for the posterior pelvis category and as high as 0.85 for the acetabular category with the "separate" fracture model.

CONCLUSION

We successfully created deep learning models that can detect pelvic imaging position, hardware presence, and pelvic and acetabular fractures with AUC loss of only 0.03 for proximal femoral fracture.

Safety and efficacy of 2D-fluoroscopy-based iliosacral screw osteosynthesis: results of a retrospective monocentric study

Introduction

Iliosacral screw osteosynthesis is a well-accepted procedure for stabilization of sacral fractures and iliosacral (fracture) dislocations.

Materials and Methods

In this monocentric study, safety and efficacy of conventional 2D-fluoroscopic-guided iliosacral screw insertion were evaluated.

Results

During a 10-year period (2005–2014), 98 patients between the age of 18 and 65 years received 207 iliosacral screws in 101 procedures. Average patient age was 43.2 years. There were 46 Type B and 40 Type C injuries in the AO/OTA classification, nine patients had a fragility fracture of the pelvis. In three patients, primary radiological data were missing. The indication for surgical treatment was a sacral fracture in 97 patients, a pure iliosacral dislocation in 37 patients and a fracture-dislocation in 31 patients. 70 procedures were performed with the patient in supine position, 31 with the patient in prone position. Surgery was done in a minimal-invasive technique in 76 patients, in 22 patients an open reduction was necessary before screw insertion. 81 patients received a unilateral, 17 patients a bilateral screw osteosynthesis. 199 screws were inserted in S1, only eight screws in S2. 65 patients received two screws unilaterally, ten patients two screws bilaterally. There were no vascular or neurologic complications. During in-hospital stay, there were seven complications, which needed 12 operative revisions: three wound infections, two hematomas, one screw malalignment and one early screw loosening. In 28 patients with 56 iliosacral screws, a pelvic CT-scan was performed during follow-up. A penetration of a cortical layer was diagnosed in 20 of these screws. All penetrations were seen in double screw osteosynthesis of S1. In none of the patients, complaints could be explained by the malalignment of these screws. Five operative revisions were performed during follow-up: two for screw loosening, two for fracture healing problems and one for screw malalignment. Metal removal was performed in 39 patients with 75 screws. 2D-fluoroscopic-guided iliosacral screw osteosynthesis is a safe and efficient procedure in clinical practice.

Discussion

A thorough preoperative evaluation of the morphology of the upper sacrum and careful operative procedure are indispensable. Fluoroscopic views in AP, lateral, inlet and outlet must allow recognition of all anatomical landmarks. The indication for double screw osteosynthesis in S1 should be taken with caution. Screw malalignments do not inevitably correlate with complaints.

Feasibility of anterior pelvic ring fixation alone for treating lateral compression type 1 pelvic fractures with nondisplaced complete sacral fractures: a retrospective study

Purpose

The aim of this study was to evaluate the feasibility of anterior pelvic ring fixation alone for treating lateral compression type 1 (LC-1) fractures with nondisplaced complete sacral fractures.

Methods

Patients with LC-1 type pelvic fractures with nondisplaced complete sacral fractures in the Xi’an Honghui Hospital were screened. Those who underwent surgical treatment for the anterior pelvic ring fractures and conservative treatment for the sacral factures were included in the analysis. The Majeed and Short Form-12 (SF-12) functional scores were used to evaluate these patients.

Results

Of the 123 patients enrolled, 108 (88%) responded to our enquiries regarding the outcome. The mean follow-up period was 18.37 months for the 108 patients who responded. The mean SF-12 functional score was 48.22 ± 9.68. The mean Majeed score was 83.47 ± 9.23, including 52 with excellent, 47 with good, seven with fair, two with poor outcomes. The SF-12 functional and Majeed scores were significantly higher in those aged <45 years or without lower limb injury than in those aged ≥45 years or with lower limb injury (P < 0.05).

Conclusion

Acceptable functional outcomes can be obtained for LC-1 pelvic fractures with nondisplaced complete sacral fractures by using anterior pelvic ring fixation alone.

A systematic review of combined pelvic and acetabular injuries

PURPOSE

Injuries of both pelvic ring and acetabulum as rare very few articles are available in literature. There are no set protocols in defining the injury let alone defining early and definitive management strategies. This article is an attempt to encompass all available data to give us guidelines in managing these injuries.

METHODS

An extensive literature review was carried out on PubMed/Medline, google scholar and Embase databases was done with the eligibility criteria of 1) Case series with a minimum of 20 cases. 2) The patient's outcome reported. 3) Full article available. 4) Article in English. 5) Minimum Jadad score of 3. As per PRISMA guidelines the search was done and gradually filtered down to relevant articles which were 8 in number.

RESULTS

The incidence of these injuries range from 5 to 16%. The transverse acetabular fracture pattern is the commonest followed by associated both column fractures. There is equal propensity of Anteroposterior compression and lateral compression injuries. The injury mechanism appears to transmitted lateral force from the greater trochanter inwards with an implosion injury causing acetabular and pelvic injury as a continuum. The initial management is similar to managing pelvic ring injuries with focus on patient resuscitation, hemodynamic stabilization and temporary stabilization. The injury severity score and the mortality rates are comparable to isolated unstable pelvic ring injuries. Definitive management focuses on fixing the posterior pelvic ring first followed by the acetabular fracture and then the anterior pelvic ring. The displacement rates and outcome is worse than isolated acetabular injuries or pelvic injuries.

CONCLUSION

Combined Pelvic and acetabular injuries are complex injuries which need to be managed initially as we manage pelvic injury and later as we fix as an acetabular fracture meticulously.

Risk factors for complications and in-hospital mortality: An analysis of 19,834 open pelvic ring fractures

BACKGROUND

Open pelvic fractures are rare injuries, associated with high patient morbidity and mortality. Few studies have investigated the impact of patient demographics, comorbidities, and injury related factors on complication and mortality rates. The purpose of this study was to: (1) identify the overall incidence of complications and mortality after open pelvic fractures, (2) compare patient factors between those who did and did not develop complications, (3) identify perioperative independent risk factors for complications and mortality.

METHODS

A query was performed for patients with open pelvic fractures between 2007 and 2017 using the American College of Surgeons National Trauma Data Bank. Patient and injury specific variables were collected and complications were identified using International Classification of Disease Ninth and Tenth edition Codes. Patient demographic and perioperative data was compared using Fisher's exact test and chi-square test for categorical variables, and Welch's t-test for continuous variables. Using pooled data from multiple imputations, logistic regressions were used to calculate odds ratios and confidence intervals of independent risk factors for complications.

RESULTS

A total of 19,834 open pelvic fracture cases were identified, with 9622 patients (48.5%) developing at least one complication. Patients who developed complications were older (35.0 vs 38.1 years), and had higher Injury Severity Scores (17.7 vs 26.5), lower Glasgow Coma Scores (14.2 vs 11.7), and a larger proportion presenting with hypotension (21% vs 6.9%). After pooled regression involving 19 factors, these were the strongest independent predictors of inpatient complication and mortality.

CONCLUSION

We report a mortality rate of 14%, with an inclusive complication rate of 48.5%. Evaluating risk factors for morbidity and mortality for this devastating orthopaedic injury provides knowledge of an inherently sparse population.

LEVEL OF EVIDENCE

Level II, Retrospective study.

Quality of life after pelvic ring fractures: Long-term outcomes. A multicentre study

AIMS

This study was conducted to determine long-term (5-10 years) health-related quality of life (HRQOL) and ceiling effects in patients with a pelvic ring fracture.

PATIENTS AND METHODS

We identified all patients with pelvic ring fractures after high-energy trauma admitted at two level 1 trauma centres in the Netherlands from 2006 to 2011. Patients were asked to complete the Majeed Pelvic Score (MPS), EuroQol-5D (EQ-5D) and Short Musculoskeletal Function Assessment (SMFA) questionnaires. HRQOL analysis used a multiple linear regression model.

RESULTS

In total, 136 patients returned the questionnaires. The median follow-up period was 8.7 years. The mean MPS and EQ-5D-VAS scores were 85.1 and 74, respectively. The mean EQ-5D index scores were 0.87, 0.81 and 0.82 in Tile B, A and C patients, respectively. The mean SMFA index was 24. A ceiling effect was observed for 1/3 of the patients. After multiple linear regression analysis, no differences were identified among the various fracture types for each questionnaire, with the exception of 2 subscales of the MPS.

CONCLUSION

Patients who suffer pelvic ring fractures generally have good HRQOL outcomes after 5-10 years. No significant differences were found among different fracture types. Long-term follow-up of patients with Tile C fractures is warranted.

Current Trends in the Surgical Treatment of Open-Book Pelvic Ring Injuries: An International Survey Among Experienced Trauma Surgeons

INTRODUCTION

In the open-book, rotationally unstable (OTA/AO type 61-B1.1) pelvic ring injury, the posterior sacroiliac complex is believed to remain intact. Therefore, anterior ring stabilization alone has been the standard treatment recommendation. However, treatment failures using this method have caused a reconsideration of this management strategy. Anterior plus posterior fixation is the main alternative. In the absence of any specific new guidelines, the choice of treatment currently relies on the preference of the treating surgeon. The objective of this survey was to determine the relative use of anterior plus posterior fixation, as opposed to the standard anterior fixation alone, for the treatment of open-book pelvic ring injuries.

METHODS

An international group of 176 practicing trauma surgeons experienced in pelvic ring fracture fixation participated in an AO Foundation survey asking for their preferred standard surgical fixation (anterior alone or anterior plus posterior combined) for OTA/AO type 61-B1.1 open-book pelvic fractures.

RESULTS

Anterior plate fixation alone (group 1) was preferred by 56% of the survey participants, and combined anterior plus posterior fixation (group 2) was preferred by 44%. Statistical analysis revealed that group 1 participants were significantly older than group 2 participants (P = 0.03) and had more years of surgical experience (P = 0.02).

CONCLUSIONS

Concern regarding the inadequacy of anterior fixation alone has led many surgeons, especially those more recently in practice, to add posterior fixation, despite limited data to determine its indications. No doubt the OTA/AO type B 1.1 pelvic ring disruption actually represents a wide spectrum of injury. Further study is needed to determine the best fixation method.

Digital Anatomy to Improve Screw Insertion Techniques for Plate-Screw Fixation of the Pubic Body

Objectives

This study aims to investigate screw insertion sites on the pubic body and the safe screw insertion parameters of a plate-screw fixation system based on the premise of avoiding damage to the inguinal canal and disruption of the rectus abdominis at the pubic symphysis and pubic crest.

Research Methods

Excluding cases with poor image quality, tumors, malformations, and fractures, the data of 80 healthy adults (40 males and 40 females aged from 21 to 83 years old, with an average age of 51.65 years) undergoing a computed tomography (CT) scan of the pelvis between January and June of 2017 were collected from Shandong Provincial Hospital. The CT scans were imported to Mimics® software to reconstruct three-dimensional pelvic models. A 3.5 mm pelvic reconstruction plate was placed starting at the outer edge of the pubic tubercle and along the pelvic brim. The two innermost screw insertion sites were marked. The safe range for the screw insertion sites was then determined. The screw insertion plane was selected to measure the safe screw insertion parameters. The length of the screw, the direction of insertion, and intersex differences were then explored via statistical analyses.

Results

The medial inclination angles (MIAs) of the screw insertion plane for males and females were 30.42±7.95° and 32.88±10.65°, respectively, with no statistically significant differences. For the medial screw, the maximum anterior inclination angle (MAIA), the maximum screw length, and the maximum posterior inclination angle (MPIA) were 46.51±4.01°, 12.40±9.53 mm, and 11.78±10.22° on average, respectively, with no significant differences by gender (P>0.05). For the lateral screw, the MAIA was 10.35±9.46° and showed no gender differences (P>0.05), but the male group had a greater MPIA (male 11.80±11.00° vs. female 6.23±7.91°, P<0.05) and maximum screw length (male 55.71±6.36 mm vs. female 48.68±8.65, P<0.001). For the tangential screw, the maximum screw length, MIA, and anterior/posterior inclination angle (APIA) were 52.19±8.33 mm, 31.65±9.42°, and 7.53±10.18°, respectively, with no significant differences in the angles by gender (both P>0.05), although the screw length in the male group was significantly longer than that in the female group.

Conclusions

Insertion of two screws into the pubic body through a plate from the lateral side of the pubic tubercle is safe and can maintain the origin of the rectus abdominis and the integrity of the inguinal canal compared to traditional plate-screw fixation. Considering that the pubic body is thinner on the lateral side, we suggest a more medial inclination angle for the lateral screw.

Patient Weight-bearing after Pelvic Fracture Surgery-A Systematic Review of the Literature: What is the Modern Evidence Base?

Background

Little attention in the literature appears to have been paid to the issue of postoperative weight-bearing protocols for different injury patterns after pelvic fracture surgery. The primary aim of this study is to review the currently available literature to define the level of available evidence used to inform surgical decisions on weight-bearing after pelvic fracture surgery. Secondary aims are to assess the published methods of fracture classification, surgical management, and assessment or reporting of patient outcomes.

Methods

A systematic review of the English language literature from 1990 to 2016 was undertaken. Eligible papers were all papers reporting minimum 6-month outcomes following surgery for pelvic fractures in adults. Exclusion criteria included pathological fractures or those resulting from penetrating injury, solely osteoporotic fractures, or series with less than 6 months of follow-up data.

Results

There is very little published scientific data to inform the treating surgeon on postoperative weight-bearing protocols after pelvic fracture surgery, with no randomized trials and only 1 paper out of 122 stating this as a primary aim. More than half of the papers published did not state what postoperative protocol was employed. There is no standardization of outcome measures, with less than 20% of papers using the most common validated outcome scoring system; in contrast, there is good agreement on the use of either the Tile (75%) or Burgess and Young (20%) classification.

Limitations

Due to the lack of published studies looking at the topic of postoperative weight-bearing after pelvic fractures, no specific recommendations are possible. As large numbers of papers were included, they were not individually assessed for bias.

Conclusion

A review of postoperative weight-bearing regimes reveals a nonexistent scientific evidence base from which to make recommendations, although a consensus strategy has been identified. Future research needs to be directed at this topic, as has already been the case in numerous other fracture areas, since the advantages of early mobility are potentially significant. The reported methodology for assessing and reporting patient outcomes after pelvic fracture surgery reveals no consistent standards, and the majority of papers use no specific outcome scoring system.

How to cite this article

Rickman M, Link B-C, Solomon LB. Patient Weight-bearing after Pelvic Fracture Surgery-A Systematic Review of the Literature: What is the Modern Evidence Base? Strategies Trauma Limb Reconstr 2019;14(1):45-52.

Functional outcomes in pelvic fractures and the factors affecting them- A short term, prospective observational study at a tertiary care hospital

BACKGROUND

Pelvic fractures are markers of high energy trauma and are associated with significant morbidity and mortality. With evolution of modern diagnostic tools and intervention their management has come a long way.

RESEARCH QUESTION

Whether or not modern healthcare could provide the victims of such high energy trauma with a good functional outcome and optimal quality of life, such that they are able to perform their activities of daily living independently?

OBJECTIVES

To evaluate the functional outcomes in pelvic fractures and to find out factors that could indicate the prognosis.

METHODOLOGY

Ours is a prospective observational study with 75 patients at a tertiary care hospital between September 2015 to December 2016. The minimum duration of follow up was six months. Patients' demographic profile, mode and pattern of injury, associated injuries, management and subsequent complications, if any were recorded prospectively. Functional outcomes were assessed using the Majeed score. All preoperative parameters were correlated statistically with the Majeed score to find out their association.

RESULTS

Majeed scores were excellent in 27 patients, good in 29 patients, fair in 12 patients and poor in 7 patients. Overall functional outcome were good due to availability of sophisticated diagnostic tools, dedicated trauma management team and experienced pelvi-acetabular surgeon. Poorer outcomes were seen in male gender, associated urogenital injuries, associated acetabulum and sacrum fractures, associated nerve injuries and bedsore. No association were seen with age, fracture pattern, treatment modality and timing of surgery.

CONCLUSION

With modern day diagnostic and therapeutic modalities the functional outcome a patient could achieve is promising. With associated risk factors guiding the outcome, the health care provider can individualise the management and decrease the overall morbidity and mortality of such high energy injuries.

Predictors of mortality after pelvic fractures: a retrospective cohort study from a level one trauma centre in Upper Egypt

PURPOSE

The primary objective was to identify the predictors of in-hospital mortality after pelvic ring injuries. Secondary objectives were to analyze the differences between adults and children and to analyze the causes and timing of death.

METHODS

A retrospective cohort study from the pelvic registry of Assiut University Trauma Unit (AUTU), a level 1 trauma centre in Upper Egypt, was carried out. A total of 1188 consecutive patients with pelvic ring fractures treated from January 2010 to December 2013 were eligible for analysis. Potential predictors were identified using standard statistical tests: univariable and multivariable regression analysis.

RESULTS

Nine hundred fifty-one were adults (above 16 years) and 237 were children. According to Tile's classification, fractures type A, B, and C were 31.8%, 25.1%, and 43.1%, respectively. About a third of patients had fractures with soft tissue injury. Abdominopelvic collection as diagnosed by Focused Assessment with Sonography for Trauma (FAST) was positive in 11%. Associated injuries were present in 67.3% with abdominal-urogenital injuries being the most prevalent (66.3%). Median hospital stay was five days. Fifty-two patients (4.4%) were admitted to the ICU. One hundred three patients died (8.7%) within two peaks: first 24 hours and between 48 hours and one week. Multivariable logistic regression analysis identified increasing age, fractures with soft tissue injury, associated head injury, positive FAST examination, and admission to an ICU as significant predictors of in-hospital mortality.

CONCLUSIONS

The first 24 hours were confirmed to be critical for survival in pelvic fracture patients. Advancing age, associated soft tissue injury, associated head injury, admission to ICU, and positive FAST examination can serve as reliable predictors for an elevated mortality risk in such patients.

Outcome Determinants of Patients with Traumatic Pelvic Fractures: A Cohort Study in a Level I Trauma Center in Southern Iran

Pelvic fracture is a result of devastating injuries and is usually encountered in conjunction with other life-threatening injuries. The aim of the current study was to determine the outcome determinants of patients with pelvic fractures referred to a large trauma center in southern Iran. This retrospective cross-sectional study was conducted in a level I trauma center over a period of three years from 2012 to 2015. We included all patients with pelvic fractures whose medical records had sufficient data. Data were compared between good condition and poor conditions. A total of 327 patients with mean age of 40.1 ± 19.7 years were included. Poor condition was defined as being associated with higher heart rate (p=0.002), lower systolic blood pressure (p<0.001), lower diastolic blood pressure (p=0.002) lower Glasgow Coma Scale (GCS) on admission (p<0.001) and higher Injury Severity Score (ISS) (p<0.001). Those with poor conditions had significantly higher admission to ICU (p<0.001), higher rate of surgical interventions (p<0.001) and higher mortality (p<0.001). The hospital length of stay (p<0.001) and ICU length of stay (p=0.025) were also longer in those with poor condition. Lower hemoglobin, lower pH, higher heart rate, lower systolic blood pressure, lower GCS on admission and higher ISS were important outcome determinants of traumatic pelvic fractures.

Epidemiology of Pelvic Ring Fractures in a Level 1 Trauma Center in the Netherlands

Purpose

This study was conducted to study the epidemiology, classification, treatment and outcome of a large patient group with pelvic ring injury in a level 1 trauma center in the Netherlands.

Materials and Methods

In the period of 2004 to 2014, we encountered 537 patients with a pelvic fracture. Many of them are due to a high energy trauma and therefore many concomitant injuries are observed. Tile A fractures were seen in 137 patients (25.5%), Tile B fractures in 211 (39.3%) and Tile C fractures in 189 patients (35.2%).

Results

Patients with unstable fracture types (Tile B1 and B3, Tile C) had significantly higher injury severity score, transfusion rates, need for laparotomy and definitive operative stabilization and complication rate. However, mortality did not differ significantly among Tile A, B or C fractures.

Conclusion

Overall outcome was good with a mortality rate of 13.6%, which is comparable with other rAelpmorotsst. half of the patients treated could directly be dismissed to their own homes.

Association of pelvic fracture patterns, pelvic binder use and arterial angio-embolization with transfusion requirements and mortality rates; a 7-year retrospective cohort study

Background

Pelvic fractures are severe injuries with frequently associated multi-system trauma and a high mortality rate. The value of the pelvic fracture pattern for predicting transfusion requirements and mortality is not entirely clear. To address hemorrhage from pelvic injuries, the early application of pelvic binders is now recommended and arterial angio-embolization is widely used for controlling arterial bleeding. Our aim was to assess the association of the pelvic fracture pattern according to the Tile classification system with transfusion requirements and mortality rates, and to evaluate the correlation between the use of pelvic binders and arterial angio-embolization and the mortality of patients with pelvic fractures.

Methods

Single-center retrospective cohort study including all consecutive patients with a pelvic fracture from January 2008 to June 2015. All radiological fracture patterns were independently reviewed and grouped according to the Tile classification system. Data on patient demographics, use of pelvic binders and arterial angio-embolization, transfusion requirements and mortality were extracted from the institutional trauma registry and analyzed.

Results

The present study included 228 patients. Median patient age was 43.5 years and 68.9% were male. The two independent observers identified 105 Tile C (46.1%), 71 Tile B (31.1%) and 52 Tile A (22.8%) fractures, with substantial to almost perfect interobserver agreement (Kappa 0.70-0.83). Tile C fractures were associated with a higher mortality rate (p = 0.001) and higher transfusion requirements (p < 0.0001) than Tile A or B fractures. Arterial angio-embolization for pelvic bleeding (p = 0.05) and prehospital pelvic binder placement (p = 0.5) were not associated with differences in mortality rates.

Conclusions

Tile C pelvic fractures are associated with higher transfusion requirements and a higher mortality rate than Tile A or B fractures. No association between the use of pelvic binders or arterial angio-embolization and survival was observed in this cohort of patients with pelvic fractures.

Comparisons of front plate, percutaneous sacroiliac screws, and sacroiliac anterior papilionaceous plate in fixation of unstable pelvic fractures

BACKGROUND

This observational study was aimed at comparing the clinical efficacy of sacroiliac anterior plate fixation (SAPF), sacroiliac anterior papilionaceous plate (SAPP), and percutaneous sacroiliac screw internal fixation (PSCIF) introduced for patients with unstable pelvic fracture.

METHODS

Seventy-eight patients with unstable pelvic fracture (Tile type B or C) were recruited. Twenty-six patients underwent SAPF, 26 underwent SAPP, and 26 underwent PSCIF. Matta scores were calculated to evaluate the reduction of pelvic fractures, and Majeed scores were applied for the assessment of functional recoveries after surgery. Other perioperative clinical indicators were also recorded, including operation time, bleeding status, length of incision, ambulation time, fracture healing time, and incision infection.

RESULTS

Total operation time of PSCIF was remarkably shorter than that of SAPF and SAPP (P < .05), and the bleeding volume of SAPF and SAPP group was almost 26∼29 times as high as that of PSCIF group (P < .05). Besides, SAPP resulted in significant blood loss compared with SAPF (P < .05), while SAPF resulted in significantly larger operative incision length than SAPP and PSCIF (P < .05). Moreover, patients' stay time was prolonged in both SAPF and SAPP groups than in the PSCIF group (P < .05). Patients who received PSCIF exhibited significantly higher Matta and Majeed scores than those who received SAPF (all P < .05). Finally, SAPP was associated with fewer complications than SAPF, and complications were barely observed in the PSCIF group.

CONCLUSION

PSCIF may be more appropriate for patients with unstable pelvic fractures in comparison with SAPP and SAPF. Besides, SAPP is likely to be more efficacious than SAPF especially for Tile C patients.

Functional outcome of patients with unstable pelvic ring fracture

The purpose of this study was to evaluate factors that correlated with unsatisfactory short- and long-term outcome in patients who sustained unstable pelvic ring fracture. The study subjects of this study were those of type B and C pelvic ring fractures (82 patients; mean age 54 years). Age, gender, associated injuries, fracture type, Injury Severity Score rating and treatment methods were assessed, and Majeed score for functional outcome and radiographic studies at 1 year after injury (short-term) and at final follow-up (long-term), with mean follow-up of 98 months were analyzed. Significant univariate factors ( p < 0.05) were entered in a multivariate logistic regression model to determine the independent predictors of unsatisfactory functional outcome. Univariate analysis showed that fractures of the lower extremity, nerve damage, conservative treatment, and radiological outcome correlated with unsatisfactory short-term functional outcome, while female gender, brain injury, nerve damage, conservative treatment, fracture location at the posterior portion of pelvic ring, radiological outcome, and pure sacroiliac dislocation only for type C fracture correlated with unsatisfactory long-term outcome. Multiple logistic regression analysis identified fractures of the lower extremity (odds ratio (OR): 5.364), conservative treatment (OR: 13.690), and nerve damage (OR: 21.392) as determinants of unsatisfactory short-term functional outcome and nerve damage (OR: 66.926) and poor radiological results (OR: 33.944) as determinant of long-term functional outcome. In patients with unstable pelvic ring injury, fractures of the lower extremity, conservative therapy, and nerve damage influenced short-term functional outcome, while that nerve damage and the pelvic ring displacement over 20 mm negatively affected long-term outcome.

The incidence of and factors affecting iliosacral screw loosening in pelvic ring injury

INTRODUCTION

Iliosacral screw fixation has been commonly used for stabilization of the posterior ring in unstable pelvic fractures. However, loosening of the screw may develop with or without redisplacement of the fracture. This study was undertaken to evaluate the incidence of iliosacral screw loosening and to identify its predictive factors.

MATERIALS AND METHODS

In total, 110 patients whose posterior pelvic ring was stabilized with iliosacral screws were enrolled. These included 9 cases of anteroposterior compression, 64 cases of lateral compression, and 37 cases of vertical shear (VS) injuries. Among those with posterior pelvic ring injuries, 95 had sacral fractures (zone I: 52, zone II: 43) and 15 had sacroiliac joint dislocations. The screws were fixed to the anterior one-third region of the first sacral (S1) body in 46 cases, and to the middle one-third region in the remaining 64 cases. If loosening of the iliosacral screw influenced the pelvic ring stability, it was considered a failure. The relationship between iliosacral screw loosening and the possible influencing factors were analyzed.

RESULTS

Nineteen patients (17.3 %) were found to have loosening of the iliosacral screw at a mean 25.3 days postoperatively. Of these, 13 patients (11.8 %) had failure of the screws. The incidence of iliosacral screw loosening was significantly higher in those with VS injury (29.7 %, p = 0.014), in those with screw fixed to the middle one-third region of the S1 body (23.4 %, p = 0.044), and in those with VS injury combined with zone II sacral fracture (43.5 %, p = 0.019). With respect to failure of the iliosacral screw, patients with VS injury also had a higher incidence of failure (21.6 %, p = 0.036).

CONCLUSIONS

Our findings demonstrate that cases with VS injuries are prone to screw loosening, especially when combined with zone II sacral fracture. Accordingly, alternative fixation methods should be considered in such cases.

Effectiveness of non invasive external pelvic compression: a systematic review of the literature

Introduction

Pelvic fractures might carry a significant risk of bleeding. A wide variety of pelvic binders together with pelvic sheets are available and offer an adjunct to the initial management of poly-trauma patients with pelvic injuries. These devices are collectively referred to as pelvic circumferential compression devices (PCCDs). The aim of this study was to review the literature for evidence pertinent to the efficacy and safety of PCCDs.

Methods

Using the PRISMA guidelines a systematic search on PubMed, Web of Science, CINAHL, Embase and Scopus was carried out. Articles included were in English language and published between 1999 and 2015. Studies included were appraised with narrative data synthesis.

Results

Seven articles addressed mechanical properties of non-invasive external mechanical devices, six articles focused on physiological aspects, and three studies evaluated the pressure characteristics of these devices. We found 4 case reports regarding adverse effects. None of the studies identified addressed the cost effectiveness or pain relief issues related to the use of PCCDs.

Conclusions

Based on available literature, PCCDs are widely used in the initial management of patients with suspected pelvic bleeding. There is evidence to suggest that external compression reduces disrupted pelvic rings. There are some complications reported following application of PCCDs. Hemorrhagic source and physiological effectiveness of PCCDs needs to be addressed in future studies. In the meantime judicious application of PCCDs will continue to be recommended.

The cement-augmented transiliacal internal fixator (caTIFI): an innovative surgical technique for stabilization of fragility fractures of the pelvis

INTRODUCTION

Analyzing the different age groups in a population who suffered a pelvic ring fracture it becomes obvious that there are important differences between the pelvic ring lesions of an elderly patient compared to a young adult concerning trauma mechanism, fracture pattern and therapeutic options. In the elderly patient it is very important to achieve maximum of stability if surgery is necessary in order to avoid early failure of the ostheosynthesis under mobilization with full weight bearing.

PATIENTS AND METHODS

15 patients (14 female) with fragility fractures of the pelvis that required surgical stabilization were eligible to participate in this study from December 2012 to December 2014. Such details were documented and analysed as patient demographics, mechanism of injury, fracture classification, operative treatment and postoperative radiological parameters of achieved bone-implant interface.

RESULTS

The average age of the patients was 79.9 years (SD 9.0 years). According to Rommens five patients had a fragility fracture of the pelvis Type II-c, one a Type III-c, six a Type IV-b and three a Type IV-c. Four patients were treated by a cement augmented transiliac internal fixation (caTIFI). Seven patients received a cement augmented iliolumbar fixation. In all these patients the Schanz screws applied to the ilium were placed in an oblique dorsoventral direction into the supraacetabular bone canal (mean length of screws 100 ± 20mm, max. 135 mm, min. 70 mm). Even though in four patients the iliosacral joint was hit tangential and one cortex perforation without any cement leakage appeared no revision surgery was necessary. Overall the clinical findings including mobilisation with full weight bearing showed a sufficient mechanically stability in all patients.

CONCLUSION

The focus of this study was to describe the modified surgical technique of the caTIFI with placing the Schanz screws from the posterior superior iliac spine to the anterior inferior iliac spine into the supraacetabular bone canal. Usage of cannulated and perforated Schanz screws gives the opportunity to control the correct position of the screws before implanting them. Another advantage is that additional stability can be obtained by cement augmentation. We believe that the new technique of the caTIFI provides a greater intraoperative versatility and a greater mechanical stability for fragility fractures of the pelvis.

Predictors of mortality for complex fractures of the pelvic ring in the elderly: a twelve-year review from a German level I trauma center

STUDY OBJECTIVE

To document mortality rate and predictors of mortality in elderly patients with complex pelvic fractures.

METHODS

We reviewed a total of 84 subjects whose ages were above 70 years with complex pelvic fractures, admitted to our hospital from January 2001 to December 2012. A multivariate linear regression model was used to determine the predictors of mortality in the study population. The median age of the patients was 80.4 years (range 70-94 years). 65 of 84 (77%) patients were females. There were 72 Tile Type B fractures (86%) and 12 Type C fractures (14%). The most common associated injuries were thoracic, extremity and head injuries, with incidence of 13 (15%), 11 (13%), and 9 (11%), respectively.

RESULTS

The mortality rate was 10% in our study population. The initial haemoglobin on admission (p<0.01), the presence of blood vessel injuries (p<0.01) and the number of PRBCs transfused within the first six hours after admission (p<0.01) independently predicted mortality in elderly patients with complex pelvic fractures.

CONCLUSION

Although there is a downward trend in mortality in elderly patients with complex pelvic fractures, haemodynamic instability still has a significant impact on survival of those patients.

[Current treatment of pelvic ring fractures]

Pelvic injuries are often associated with multiple injuries of other body regions, neurovascular and visceral lesions, as well as hemodynamic instability. The use of a standardized classification characterizing the severity and stability of pelvic fractures and the early stabilization of pelvic ring injuries in appreciation of damage control principles has helped to improve the number of survivors. This is particularly necessary due to the higher number of older patients. Complex pelvic trauma still represents a life-threatening situation for the patient, particularly in multiple traumatized patients. Standardized clinical investigations and modern concepts even in the preclinical therapy of complex pelvic fractures make a contribution to enhancement of treatment options. Because of the still problematic long-term results after surgery of instable pelvic fractures, the need for modern treatment concepts has to be adapted to the requirements.

Percutaneous iliosacral fixation in external rotational pelvic fractures. A biomechanical analysis

INTRODUCTION

Although the gold standard in open book pelvic fractures remains the pubic symphysis (PS) plate fixation, the clinical outcomes are not satisfactory, despite the excellent anatomical reduction assessed radiologically. Some authors suggest that residual instability of the posterior pelvic elements may be responsible for the chronic pain and the early osteoarthritic changes in the sacroiliac joint (SIJ).

OBJECTIVE

To evaluate whether the isolated posterior fixation with one or two iliosacral screws (ISSs) is sufficient to provide adequate stability for the treatment of Burgess Young APC-II (YB APC-II) type of pelvic ring injuries.

METHODS

Biomechanical experimental study using 7 fresh human pelvises, where an YB APC-II pelvic injury was previously implemented. The isolated posterior fixation of the pelvic ring with 1 or 2 ISSs directed in the S1 vertebra body was analysed in each specimen following an axial load of 300N. The different displacement of the SIJ and of the PS were analysed in all three spatial axes, using the validated optical measurement system 3D PONTOS 5M. A multivariate version of Friedman test (non-parametric ANOVA for repeated measures) was performed.

RESULTS

The isolated fixation of the SIJ with 1 ISS did not show any differences with respect to the intact pelvis (p=0.851). Regarding the PS, both type of fixations (with 1 or 2 ISSs) confirmed an acceptable correction and adequate control of the PS even though with some differences compared to the intact pelvis (p=0.01). The presence of the second ISS found not to offer any significant additional benefit. The three-dimensional analysis of the behaviour of the pelvic elements, in these two different types of fixation, did not show any statistical significant differences (p=0.645).

CONCLUSION

The posterior fixation with ISS can represent an alternative option for treatment of pelvic injuries associated with rotational instability. Further prospective clinical studies are necessary to determine, the influence of the residual pubic symphysis mobility in the every day life, when the above-mentioned technique is applied.

Nonoperative treatment of intermediate severity lateral compression type 1 pelvic ring injuries with minimally displaced complete sacral fracture

OBJECTIVES

Controversy exists regarding optimum management of lateral compression type 1 (LC1) pelvic ring injuries (OTA type 61-B2.1), particularly in patients with complete sacral fractures. We hypothesized that nonoperative treatment would result in acceptable functional outcomes.

DESIGN

Database review.

SETTING

Level I trauma center.

PATIENTS

We identified patients treated for LC1 fractures (n = 406) from 2007 to 2011 and analyzed a subset of LC1 injuries of "intermediate severity" characterized by complete sacral fracture with less than 1 cm initial displacement (n = 104).

INTERVENTION

Fifty patients were contacted for functional outcome assessment at average follow-up of 33 months.

MAIN OUTCOME MEASURES

Majeed pelvic score and physical component summary (PCS) score and mental component summary (MCS) score of 12-item Short-Form Health Survey version 2.

RESULTS

Average Majeed pelvic score was 85.5, yielding 33 excellent, 9 good, 5 fair, and 3 poor outcomes. Mean PCS and MCS scores were 48.8 and 48.9, respectively (both confidence intervals include 50, the score for a healthy normative population). Patients with lower extremity injuries had a trend toward lower PCS and MCS and statistically significant lower mean Majeed scores (P = 0.01). Thirty-five of 37 patients without lower extremity injury had good or excellent categorical outcomes based on Majeed scores. No significant differences were observed regarding weight-bearing status, extent of anterior ring injury, or injury severity score. Radiographic follow-up was available for 36 of 50 patients. No fracture was displaced >1 cm.

CONCLUSIONS

Acceptable functional outcomes can be expected after nonsurgical management of LC1 pelvic injuries with complete sacral fracture and less than 1 cm initial displacement.

LEVEL OF EVIDENCE

Therapeutic level IV.

Damage-control orthopedics versus early total care in the treatment of borderline high-energy pelvic fractures

The purpose of this study was to compare the effectiveness of damage-control orthopedics (DCO) vs early total care (ETC) in the treatment of borderline high-energy pelvic fractures. Seventy-two patients with borderline high-energy pelvic fractures were retrospectively reviewed; 39 received DCO and 33 received ETC. Demographic data and initial injury severities were comparable between groups, except for Abbreviated Injury Scale (AIS) head scores and Glasgow Coma Scale (GCS) scores. Regarding postoperative complications, the incidence rates of acute lung injury and acute respiratory distress syndrome and the mean Acute Physiology and Chronic Health Evaluation II (APACHE II) score were significantly lower in the DCO group compared with the ETC group. Similar results were also observed in subgroups stratified by age (younger than 40 years and 40 years and older). Regarding patients with Tile B fractures, there was no significant difference between groups in incidence rates of overall postoperative complications. However, in patients with Tile C fractures, especially in those 40 years and older, the DCO group had a lower incidence rate of ALI and had lower APACHE II scores than did the ETC group. This study's findings indicate that DCO is the most suitable therapeutic option for patients with Tile C fractures, especially for those 40 years and older, whereas ETC is preferred for patients with Tile B fractures, provided that it is possible to avoid a second operation as well as any delays in patient mobilization.

Radiological findings correlate with neurological deficits but not with pain after operatively treated sacral fractures

BACKGROUND AND PURPOSE

Neurological deficits and pain are common after displaced sacral fractures. However, little is known about the association between the long-term clinical outcomes and radiological findings. We examined the long-term radiological findings and their correlations with lumbosacral pain and neurological deficits in the lower extremities after surgery for sacral fractures.

METHODS

28 consecutive patients with operatively treated displaced sacral fractures were followed for mean 11 (8-13) years. Sensorimotor impairments of the lower extremities were classified according to the American Spinal Injury Association (ASIA). Pain was assessed using a visual analog scale (VAS). All patients underwent conventional radiographic examination and CT, and the images were scrutinized for nonunion, residual displacement, narrowing of the sacral foramina, and post-foraminal encroachment of the L5 and S1 nerves.

RESULTS

There was residual displacement of ≥ 10 mm in 16 of the 28 patients. 26 patients had narrowing of 1 or more neural root foramina in L5-S4. 8 patients reported having no pain, 11 had pain only in the lumbosacral area, and 9 had pain in combination with radiating leg pain. Statistically significant correlations were found between narrowing of the sacral foramina and neurological deficits in the corresponding dermatomes. Significant correlations were also found between post-foraminal encroachment of L5 nerves and both sensory and motor deficits. No correlations were found between pain and radiological findings.

INTERPRETATION

Pathological radiological findings are common 11 years after operatively treated displaced sacral fractures. Sacral foraminal and L5 post-foraminal bony encroachments were common findings and correlated with neurological deficits. However, lumbosacral pain did not correlate with radiological sequelae after fracture healing.

The extent of ligament injury and its influence on pelvic stability following type II anteroposterior compression pelvic injuries--A computer study to gain insight into open book trauma

Surgical stabilization of the pelvis following type II anteroposterior compression pelvic injuries (APCII) is based on the assumption that the anterior sacroiliac, sacrospinous, and sacrotuberous ligaments disrupt simultaneously. Recent data on the ligaments contradict this concept. We aimed at determining the mechanisms of ligament failure in APCII computationally. In an individual osteoligamentous computer model of the pelvis, ligament load, and strain were observed for the two-leg stance, APCII with 100-mm symphyseal widening and for two-leg stance with APCII-related ligament failure, and validated with body donors. The anterior sacroiliac and sacrotuberous ligaments had the greatest load with 80% and 17% of the total load, respectively. APCII causes partial failure of the anterior sacroiliac ligament and the pelvis to become horizontally instable. The other ligaments remained intact. The sacrospinous ligament was negligibly loaded but stabilized the pelvis vertically. The interosseous sacroiliac and sacrotuberous ligaments are likely responsible for reducing the symphysis and might serve as an indicator of vertical stability. The sacrospinous ligament appears to be of minor significance in APCII but plays an important role in vertical stabilization. Further research is necessary to determine the influence of alterations in ligament and bone material properties.

[Current treatment of pelvic ring fractures]

Pelvic injuries are often associated with multiple injuries of other body regions, neurovascular and visceral lesions, as well as hemodynamic instability. The use of a standardized classification characterizing the severity and stability of pelvic fractures and the early stabilization of pelvic ring injuries in appreciation of damage control principles has helped to improve the number of survivors. This is particularly necessary due to the higher number of older patients.Complex pelvic trauma still represents a life-threatening situation for the patient, particularly in multiple traumatized patients. Standardized clinical investigations and modern concepts even in the preclinical therapy of complex pelvic fractures make a contribution to enhancement of treatment options. Because of the still problematic long-term results after surgery of instable pelvic fractures, the need for modern treatment concepts has to be adapted to the requirements.