The Chest Wall Injury Society Recommendations for Reporting Studies of Surgical Stabilization of Rib Fractures

Chest Wall Injury Society recommendations for long-term follow-up after nonoperatively and operatively managed traumatic rib and sternal fractures

LEVEL OF EVIDENCE

Systematic Review/Meta-analysis; Level IV.

Surgical stabilization of rib fractures (SSRF): the WSES and CWIS position paper

BACKGROUND

Rib fractures are one of the most common traumatic injuries and may result in significant morbidity and mortality. Despite growing evidence, technological advances and increasing acceptance, surgical stabilization of rib fractures (SSRF) remains not uniformly considered in trauma centers. Indications, contraindications, appropriate timing, surgical approaches and utilized implants are part of an ongoing debate. The present position paper, which is endorsed by the World Society of Emergency Surgery (WSES), and supported by the Chest Wall Injury Society, aims to provide a review of the literature investigating the use of SSRF in rib fracture management to develop graded position statements, providing an updated guide and reference for SSRF.

METHODS

This position paper was developed according to the WSES methodology. A steering committee performed the literature review and drafted the position paper. An international panel of experts then critically revised the manuscript and discussed it in detail, to develop a consensus on the position statements.

RESULTS

A total of 287 studies (systematic reviews, randomized clinical trial, prospective and retrospective comparative studies, case series, original articles) have been selected from an initial pool of 9928 studies. Thirty-nine graded position statements were put forward to address eight crucial aspects of SSRF: surgical indications, contraindications, optimal timing of surgery, preoperative imaging evaluation, rib fracture sites for surgical fixation, management of concurrent thoracic injuries, surgical approach, stabilization methods and material selection.

CONCLUSION

This consensus document addresses the key focus questions on surgical treatment of rib fractures. The expert recommendations clarify current evidences on SSRF indications, timing, operative planning, approaches and techniques, with the aim to guide clinicians in optimizing the management of rib fractures, to improve patient outcomes and direct future research.

The Effects of Pulmonary Risk Factors and Combination Thoracic Osseous Fractures on Mortality and Outcomes of Surgical Stabilization of Rib Fractures

BACKGROUND

Rib fixation for traumatic rib fractures is advocated to decrease morbidity and mortality in select patient populations. We intended to investigate the effect of combination osseous thoracic injuries on mortality with the hypothesis that combination injuries will worsen overall mortality and that SSRF will improve outcomes in combination injuries and in high-risk patients.

METHODS

Patients with rib fractures were identified from the Trauma Quality Improvement Project registry from 2019. Patients were then divided into rib fracture(s) alone or in combination with sternal, thoracic vertebra, or scapula fracture. Patients were also categorized into those with COPD and smokers. Patients with AIS >3 outside of thorax were excluded. Patients were subcategorized into those who had rib fixation verse nonoperative management for all subgroups. Analysis was performed to evaluate the efficacy of rib fixation.

RESULTS

A total of 111,066 patients were included for analysis. The overall mortality was 1.4%. Patients with COPD had over double the mortality risk, with an overall mortality of 3.4%. Combination injuries did not appear to increase mortality. SSRF did not decrease mortality; however, the number of patients in this group was too small to complete statistical analysis. The overall complication rate was 0.43%. There was a trend towards an increase in extrapulmonary complications in the group that underwent surgical fixation.

DISCUSSION

Mortality from rib fractures with concomitant osseous thoracic fracture appears to be low. However, mortality is increased in patients with COPD regardless of rib fracture pattern. The number of patients who underwent SSRF was too small to make a statistical comparison.

Surgical stabilisation of rib fractures: A meta-analysis of randomised controlled trials

INTRODUCTION

Rib fixation for ventilator dependent flail chest patients has become a mainstay of management in major trauma centres. However, the expansion of rib fixation for fractured ribs beyond this remains largely in the hands of enthusiasts with the benefits in non ventilator dependent groups largely unproven. Previous meta-analyses have largely included non-randomised and retrospective data, much of which is now more than two decades out of date. We wanted to perform an updated meta-analysis including only rigorous prospective trials which were randomised. Further we wanted to include quality of life outcomes which have not been previously examined in published meta-analyses.

METHODS

This meta-analysis was conducted in accordance with Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines and included randomised controlled trials only, of rib fixation compared to non-operative management in adult patients.

RESULTS

Eight studies comprising 752 patients of whom 372 had been randomised to receive rib fixation were included. Benefits of rib fixation were identified with significant reductions in mechanical ventilation and lengths of stay (both ICU and hospital) as well as rates of pneumonia and tracheostomy. No significant benefit in quality of life at 6 months was identified.

CONCLUSION

Operative intervention for rib fractures leads to significantly lower rates of pneumonia, lengths of intensive care stay and time on mechanical ventilation compared to non-operative intervention. Further study is needed to investigate quality of life improvements after rib fractures as operative rib fixation expands to non-ventilator dependent groups.

Surgical stabilization of rib fractures: The impact of volume and the need for standardized indications

INTRODUCTION

We aimed to examine impact of trauma center (TC) surgical stabilization of rib fracture (SSRF) volume on outcomes of patients undergoing SSRF.

METHODS

Blunt rib fracture patients who underwent SSRF were included from ACS-TQIP2017-2021. TCs were stratified according to tertiles of SSRF volume:low (LV), middle, and high (HV). Outcomes were time to SSRF, respiratory complications, prolonged ventilator use, mortality.

RESULTS

16,872 patients were identified (LV:5470,HV:5836). Mean age was 56 years, 74% were male, median thorax-AIS was 3. HV centers had a lower proportion of patients with flail chest (HV41% vs LV50%), pulmonary contusion (HV44% vs LV52%) and had shorter time to SSRF(HV58 vs LV76 ​h), less respiratory complications (HV3.2% vs LV4.5%), prolonged ventilator use (HV15% vs LV26%), mortality (HV2% vs LV2.6%) (all p ​< ​0.05). On multivariable regression analysis, HV centers were independently associated with reduced time to SSRF(β ​= ​-18.77,95%CI ​= ​-21.30to-16.25), respiratory complications (OR ​= ​0.67,95%CI ​= ​0.49-0.94), prolonged ventilator use (OR ​= ​0.49,95%CI ​= ​0.41-0.59), but not mortality.

CONCLUSIONS

HV SSRF centers have improved outcomes, however, there are variations in threshold for SSRF and indications must be standardized.

LEVEL OF EVIDENCE

Level III.

STUDY TYPE

Therapeutic/Care Management.

Incidence of adult rib fracture injuries and changing hospitalization practice patterns: a 10-year analysis

PURPOSE

Rib fractures are common after blunt thoracic trauma and can be associated with significant morbidity and mortality. We investigated trends of rib fracture injuries among adults presenting to United States (US) emergency departments, factors related to increased likelihood of hospitalization, and hospitalization practice patterns.

METHODS

We queried the National Electronic Injury Surveillance System database between 2012 and 2021 for all patients 18 years of age and older with rib fractures. These data were extrapolated to provide national estimates. Regression analysis was performed to identify trends for injury and risk factors for hospitalization.

RESULTS

We identified 32,233 adult patients with rib fractures; this extrapolated to a national estimate of 1,430,270 patients with rib fractures during the 10-year period. Between 2012 and 2021, there was a 52% increase in the incidence rate per 100,000 persons (R2 = 0.94, p < 0.001). Males accounted for 58% of patients with rib fractures, and 50% of patients were 65 years or older. Hospitalization was required in 38% of patients, and the hospitalization rate increased by 96% during the study period (R2 = 0.96, p < 0.001). When comparing hospitals of different sizes, a 20% greater increase in the odds of hospitalization over time was identified among patients presenting to "larger" hospitals compared to "smaller" hospitals.

CONCLUSION

The incidence of rib fractures and the associated hospitalization rates are both increasing nationally, with half of cases occurring in patients aged 65 years or older. Our findings emphasize the urgent need to implement evidence-based preventive measures and current management guidelines when managing the increasing caseload of rib fracture injuries.

Is Traumatic Anterior Stove-In Chest Truly so Rare? A Single Institution Experience

INTRODUCTION

The anterior stove-in chest (ASIC) is a rare form of flail chest involving bilateral rib or sternal fractures resulting in an unstable chest wall that caves into the thoracic cavity. Given ASIC has only been described in a handful of case reports, this study sought to review our institution's experience in the surgical management of ASIC injuries.

METHODS

A retrospective review of patients with ASIC was conducted at our level I trauma center from 1//2021 to 3//2023. Information pertaining to patient demographics, fracture pattern, operative management, and outcomes was obtained and compared across patients in the case series.

RESULTS

6 patients met inclusion criteria, all males aged 37-78 years. 5 suffered motor vehicle collisions, and 1 was a pedestrian struck by an automobile. The median injury severity score was 28. All received ORIF within 5 days of admission, most commonly for ongoing respiratory distress. Patients 2 and 4 underwent bilateral ORIF of the ribs and sternum while patients 1, 5, and 6 underwent left-sided repair. Patient 3 required ORIF of left ribs and the sternum to stabilize their injuries. 5 of 6 patients were liberated from the ventilator and survived to discharge.

CONCLUSIONS

This study demonstrates successful operative management of 6 patients with ASIC and suggests that early operative intervention with ORIF for affected segments may improve respiratory mechanics, ability to wean from the ventilator, and overall survival. Further research is needed to generate standardized guidelines for the management of this uncommon and complex thoracic injury.

Surgical versus non-surgical treatment of flail chest: a meta-analysis of randomized controlled trials

PURPOSE

Conflicting evidence exists on the choice of surgical or non-surgical treatment of flail chest injuries. We aimed to perform a meta-analysis comparing outcomes in patients presenting flail chest undergoing surgical or non-surgical treatment.

METHODS

Embase, PubMed, and Cochrane databases were searched for randomized controlled trials (RCTs) comparing surgery to no surgery in patients with acute unstable chest wall injuries. We computed weighted mean differences (WMDs) for continuous outcomes and risk ratios (RRs) for binary endpoints, with 95% confidence intervals (CIs). Random effects meta-analyses were performed. Heterogeneity was assessed using I2 statistics.

RESULTS

Six RCTs (544 patients) were included, and surgical treatment was used in 269 (49.4%). Compared to no surgery, surgery reduced mechanical ventilation days (WMD - 4.34, 95% CI - 6.98, - 1.69; p < 0.01; I2 = 87%; GRADE: very low; PI - 13.51, 4.84); length of intensive care unit stay (WMD - 4.62, 95% CI - 7.19, - 2.05; p < 0.01; I2 = 78%; GRADE: low; PI - 12.86, 3.61) and the incidence of pneumonia (RR 0.50, 95% CI 0.31, 0.81; p = 0.005; I2 = 54%; GRADE: moderate; PI 0.13, 1.91). No difference in mortality (RR 0.56, 95% CI 0.19, 1.65; p = 0.27; I2 = 23%; GRADE: moderate; PI 0.04, 7.25), length of hospital stay (WMD - 5.39, 95% CI - 11.38, - 0.60; p = 0.08; I2 = 89%; GRADE: very low; PI - 11.38, 0.60), or need for tracheostomy (RR 0.59, 95% CI 0.34, 1.03; p = 0.06; I2 = 54%; GRADE: moderate; PI 0.11, 3.24) was found.

CONCLUSIONS

Our results suggest that surgical treatment is advantageous compared to non-surgical treatment for patients with flail chest secondary to rib fractures.

Intrathoracic plates versus extrathoracic plates: a comparison of postoperative pain in surgical stabilization of rib fracture technique

Background

Surgical stabilization of rib fractures (SSRF) has been shown to improve outcomes, yet there is an absence of studies comparing SSRF techniques. An intrathoracic system that minimizes incision length has recently been developed and adopted by multiple institutions. We hypothesized that SSRF with an intrathoracic system plus intercostal nerve cryoneurolysis (IC) leads to improved pain control compared with an extrathoracic system plus IC.

Methods

A single-center, retrospective chart review was performed comparing intrathoracic SSRF versus extrathoracic SSRF, and included patients undergoing SSRF from 2015 to 2021 at a level 1 trauma center. Patients who did not undergo intercostal nerve cryoablation were excluded. The primary outcome was opioid consumption based on morphine milligram equivalent (MME) consumption. We collected Rib score, Blunt Pulmonary Contusion 18 Score, number of rib fractures, number of ribs plated, and Injury Severity Score (ISS) to compare baseline characteristics of each group.

Results

A total of 112 patients were evaluated for study inclusion. Thirty-one patients were excluded due to missing outcomes data and/or lack of cryoablation. There was no difference in ISS or Rib Score between the intrathoracic (n=33) and extrathoracic (n=48) groups. At 7-day follow-up, the median MME requirement was significantly lower in the intrathoracic group (21.25) versus the extrathoracic group (46.20) (p=0.02).

Conclusion

Intrathoracic SSRF was associated with a lower postoperative MME consumption compared with extrathoracic SSRF. These data support the use of intrathoracic SSRF to improve pain control compared to extrathoracic SSRF.

Level of evidence

III.

FasterRib: A deep learning algorithm to automate identification and characterization of rib fractures on chest computed tomography scans

OBJECTIVE

Characterizing and enumerating rib fractures are critical to informing clinical decisions, yet in-depth characterization is rarely performed because of the manual burden of annotating these injuries on computed tomography (CT) scans. We hypothesized that our deep learning model, FasterRib , could predict the location and percentage displacement of rib fractures using chest CT scans.

METHODS

The development and internal validation cohort comprised more than 4,700 annotated rib fractures from 500 chest CT scans within the public RibFrac. We trained a convolutional neural network to predict bounding boxes around each fracture per CT slice. Adapting an existing rib segmentation model, FasterRib outputs the three-dimensional locations of each fracture (rib number and laterality). A deterministic formula analyzed cortical contact between bone segments to compute percentage displacements. We externally validated our model on our institution's data set.

RESULTS

FasterRib predicted precise rib fracture locations with 0.95 sensitivity, 0.90 precision, 0.92 f1 score, with an average of 1.3 false-positive fractures per scan. On external validation, FasterRib achieved 0.97 sensitivity, 0.96 precision, and 0.97 f1 score, and 2.24 false-positive fractures per scan. Our publicly available algorithm automatically outputs the location and percent displacement of each predicted rib fracture for multiple input CT scans.

CONCLUSION

We built a deep learning algorithm that automates rib fracture detection and characterization using chest CT scans. FasterRib achieved the highest recall and the second highest precision among known algorithms in literature. Our open source code could facilitate FasterRib's adaptation for similar computer vision tasks and further improvements via large-scale external validation.

LEVEL OF EVIDENCE

Diagnostic Tests/Criteria; Level III.

Prospective single-center paradigm shift of surgical stabilization of rib fractures with decreased length of stay and operative time with an intrathoracic approach

INTRODUCTION

Intrathoracic surgical stabilization of rib fractures allows for a novel approach to rib fracture repair. This approach can help minimize muscle disruption, which may improve patient recovery compared with traditional extrathoracic plating. We hypothesized patients undergoing intrathoracic plating (ITP) to have a shorter length of stay (LOS) and intensive care unit (ICU) LOS compared with extrathoracic plating (ETP).

METHODS

A prospective observational paradigm shift study was performed from November 2017 until September 2021. Patients 18 and older who underwent surgical stabilization of rib fractures were included. Patients with ahead Abbreviated Injury Scale score ≥3 were excluded. Patients undergoing ETP (July 2017 to October 2019) were compared with ITP (November 2019 to September 2021) with Pearson χ 2 tests and Mann-Whitney U tests, with the primary outcome being LOS and ICU LOS.

RESULTS

Ninety-six patients were included, 59 (61%) underwent ETP and 37 (38%) underwent ITP. The most common mechanism of injury was motor vehicle collision (29%) followed by falls (23%). There were no differences between groups in age, comorbidities, insurance, discharge disposition and injury severity score (18 vs. 19, p = 0.89). Intrathoracic plating had a shorter LOS (10 days vs. 8 days, p = 0.04) when compared with ETP but no difference in ICU LOS (4 days vs. 3 days, p = 0.12) and ventilator days. Extrathoracic plating patients more commonly received epidural anesthesia (56% vs. 24%, p < 0.001) and intercostal nerve block (56% vs. 29%, p = 0.01) compared with ITP. However, there was no difference in median morphine equivalents between cohorts. Operative time was shorter for ITP with ETP (279 minutes vs. 188 minutes, p < 0.001) after adjusting for numbers of ribs fixed.

CONCLUSION

In this single-center study, patients who underwent ITP had a decreased LOS and operative time in comparison to ETP in patients with similar injury severity. Future prospective multicenter research is needed to confirm these findings and may lead to further adoption of this minimally invasive technique.

LEVEL OF EVIDENCE

Therapeutic/Care Management; Level IV.

A method for identifying the learning curve for the surgical stabilization of rib fractures

BACKGROUND

Surgical stabilization of rib fractures (SSRF) is an accepted efficacious treatment modality for patients with severe chest wall injuries. Despite increased adoption of SSRF, surgical learning curves are unknown. We hypothesized intraoperative duration could define individual SSRF learning curves.

METHODS

Consecutive SSRF operations between January 2017 and December 2021 at a single institution were reviewed. Operative time, as measured from incision until skin closure, was evaluated by cumulative sum methodology using a range of acceptable "missteps" to determine the learning curves. Misstep was defined by extrapolation of accumulated operative time data.

RESULTS

Eighty-three patients underwent SSRF by three surgeons during this retrospective review. Average operative times ranged from 135 minutes for two plates to 247 minutes for seven plates. Using polynomial regression of average operative times, 75 minutes for general procedural requirements plus 35 minutes per plate were derived as the anticipated operative times per procedure. Cumulative sum analyses using 5%, 10%, 15%, and 20% incident rates for not meeting expected operative times, or "missteps" were used. An institutional learning curve between 15 and 55 SSRF operations was identified assuming a 90% performance rate. An individual learning curve of 15 to 20 operations assuming a 90% performance rate was observed. After this period, operative times stabilized or decreased for surgeons A, B, and C.

CONCLUSION

The institutional and individual surgeon learning curves for SSRF appears to steadily improve after 15 to 20 operations using operative time as a surrogate for performance. The implementation of SSRF programs by trauma/acute care surgeons is feasible with an attainable learning curve.

LEVEL OF EVIDENCE

Therapeutic/Care Management; Level IV.