Prognostic factors for outcomes following surgical stabilization of rib fractures: A review of the literature

Rib fractures are a common injury following blunt thoracic trauma, often resulting in high levels of morbidity and mortality. With the ageing global population, the incidence of rib fractures is expected to increase, posing a significant burden on healthcare systems worldwide. With advancements in surgical techniques and pioneering research on the topic the use of surgical stabilisation of rib fractures (SSRF) has increased significantly over the past two decades. However, the relationship between certain prognostic factors and patient outcomes following surgery is still contested and there lacks a consensus on definitive indications for the operation. This literature review presents the current research on SSRF outcomes for; patients with flail chest injuries and multiple-non flail rib fractures, optimal timing between injury and operation, and patient age. This article contributes to the ongoing dialogue surrounding chest wall trauma management and may be drawn upon to aid future research and develop clinical practice guidelines.

Efficacy and safety of the serratus anterior plane block (SAP block) for pain management in patients with multiple rib fractures in the emergency department: a retrospective study

PURPOSE

Chest trauma is a severe and frequent cause of admission to the emergency department (ED). The serratus anterior plane (SAP) block seems to be an effective method of pain management; however, data on efficacy and safety of a single SAP block performed in the ED by emergency physicians (EP) are limited. This study aimed to compare SAP block performed by the EP in the ED plus standard therapy to standard therapy alone in terms of pain severity at 0-3-6-12-18 and 24 h, total opioid consumption (milligrams of morphine equivalents, MME), respiratory function (SpO2/FiO2 ratio), and adverse events (i.e. pneumothorax, infections in the site of injection, or Local Anaesthetic Systemic Toxicity syndrome due to SAP block) in the first 24 h.

METHODS

This retrospective, monocentric study included adult patients admitted to the Sub-intensive Care Unit (SICU) of the ED with multiple rib fractures between 01/2022 and 03/2023.

RESULTS

156 patients (65.4% male; median age 62 years; median injury severity score 16; median thoracic trauma severity score 8) were included. 75 (48.2%) underwent SAP block. Patients undergoing SAP block showed significantly less pain 3-6-18 h after a single block, required less MME (0 [0-20] vs. 20 [0-40], p < 0.001), showed higher SpO2/FiO2 ratio, and no adverse events were reported.

CONCLUSION

The SAP block, in combination with standard therapy, appeared to be more effective in providing pain relief than standard therapy alone in patients admitted to the SICU for traumatic rib fractures.

Perioperative considerations for patients undergoing surgical stabilization of rib fractures: A narrative review

Surgical stabilization of rib fractures (SSRF) has become an increasingly common management strategy for traumatic rib fractures. Although historically managed with supportive care, patients with multiple rib fractures and flail chest increasingly undergo SSRF, and so the anesthesiologist must be well-versed in the perioperative management and pain control for these patients, as controlling pain in this population is associated with decreased length of stay and improved outcomes. There are multiple modalities that can be used for both pain control and as part of the anesthetic plan in patients undergoing SSRF. This narrative review provides a comprehensive summary of anesthetic considerations for surgical rib fracture patients, covering the preoperative, intraoperative, and postoperative periods. We describe an approach to the assessment of high-risk patients, analgesic and anesthetic techniques including emerging techniques within locoregional anesthesia, ventilation strategies, and potential complications. This review also identifies areas where additional research is needed to ensure optimal anesthetic management for patients undergoing SSRF.

Effects of loading rate, age, and morphology on the material properties of human rib trabecular bone

The material and morphometric properties of trabecular bone have been studied extensively in bones bearing significant weight, such as the appendicular long bones and spine. Less attention has been devoted to the ribs, where quantification of material properties is vital to understanding thoracic injury. The objective of this study was to quantify the compressive material properties of human rib trabecular bone and assess the effects of loading rate, age, and morphology on the material properties. Material properties were quantified via uniaxial compression tests performed on trabecular bone samples at two loading rates: 0.005 s^-1 and 0.5 s^-1. Morphometric parameters of each sample were quantified before testing using micro-computed tomography. Rib trabecular bone material properties were lower on average compared to trabecular bone from other anatomical locations. Morphometric parameters indicated an anisotropic structure with low connectivity and a sparser density of trabeculae in the rib compared to other locations. No significant differences in material properties were observed between the tested loading rates. Material properties were only significantly correlated with age at the 0.005 s^-1 loading rate, and no morphometric parameter was significantly correlated with age. Trabecular separation and thickness were most strongly correlated with the material properties, indicating the sparser trabecular matrix likely contributed to the lower material property values compared to other sites. The novel trabecular bone material properties reported in this study can be used to improve the thoracic response and injury prediction of computational models.

Surgical stabilization of rib fracture patients versus nonoperative controls treated by a multidisciplinary team in a single institution

Introduction

Despite promising evidence, surgical stabilization of rib fractures (SSRF) is not ubiquitously offered in all trauma centers. Some centers struggle with patient selection while some struggle due to surgeon comfort with the technique. To address this issue, our trauma center developed a multidisciplinary SSRF approach between orthopedic and trauma surgery.

Methods

This retrospective study compared 43 patients who underwent SSRF at a level 1 trauma center with 43 nonoperatively managed controls. Our study Indications were flail chest with >3 segments; non-flail with severe, bi-cortical displacement of >3 contiguous segments. Main outcome measures included mortality, ICU duration, hospital stay LOS, rates of ventilator-associated pneumonia (VAP) and ventilator days.

Results

Results of SSRF included decreases in mortality (2% vs 16.3%; p = 0.03) and in ICU duration. Patients with SSRF had a significantly shorter duration in the ICU than the nonoperative group (8.72 vs 14 days; p = 0.013) but a similar hospital duration (LOS mean, 12.81 vs 15.2; p = 0.29). Less patients in the SSRF group developed VAP but the difference was not significant (2% vs 14%, p = 0.055).

Discussion

SSRF patient outcomes supported prior evidence. The tandem approach had benefits as surgeons were able to leverage skills and expertise, increase collaboration between services, and complete more difficult reconstructions. Our experience may serve as a model for trauma centers interested in starting a new program or enhancing current service offerings.

Rib fractures in the elderly population: a systematic review

BACKGROUND

Multiple rib fractures are associated with significant morbidity and mortality, especially in elderly patients. There is growing interest in surgical stabilization in this subgroup of patients. This systematic review compares conservative treatment to surgical fixation in elderly patients (older than 60 years) with multiple rib fractures. The primary outcome is mortality. Secondary outcomes include hospital and intensive care length of stay (HLOS and ILOS), duration of mechanical ventilation (DMV) and pneumonia rates.

METHODS

Multiple databases were searched for comparative studies reporting on conservative versus operative treatment for rib fractures in patients older than 60 years. Both observational studies and randomised clinical trials were considered.

RESULTS

Five observational studies (n = 2583) were included. Mortality was lower in operatively treated patients compared to conservative treatment (4% vs. 8%). Pneumonia rate and DMV were similar (5/6% and 5.8/6.5 days) for either treatment modality. Overall ILOS and HLOS of stay were longer in operatively treated patients (6.5 ILOS and 12.7 HLOS vs. 2.7 ILOS and 6.5 ILOS). There were only minimal reports on perioperative complications. Notably, the median number of rib fractures (8.4 vs. 5) and the percentage of flail chest were higher in operatively treated patients (47% vs. 39%).

CONCLUSION

It remains unknown to what extent conservative and operative treatment contribute individually to reducing morbidity and mortality in the elderly with multiple rib fractures. To date, the quality of evidence is rather low, thus well-performed comparative observational studies or randomised controlled trials considering all confounders are needed to determine whether operative treatment can improve a patient's outcome.

Single injection, ultrasound-guided planar nerve blocks: An essential skill for any clinician caring for patients with rib fractures

In patients with acute rib fractures, regional anesthesia has the potential to reduce suffering, decrease opiate use, lower rates of in-hospital delirium, and improve pulmonary function. While many regional anesthesia techniques are complex and time consuming, two single injection nerve blocks, the serratus anterior plane block and erector spinae plane block, are particularly fast, safe, and simple methods to anesthetize the chest wall. Herein we describe two cases in which the serratus anterior plane block and erector spinae plane block were each used with great success in achieving improved pain control in trauma patients with multiple rib fractures. We believe that any provider who routinely cares for patients with rib fractures (emergency physicians and trauma surgeons alike) can and should learn to use these straightforward nerve blocks.

Is There a Role for Rib Plating in Thoracic Trauma?

Rib fractures are a morbid consequence of blunt trauma and are associated with a highly variable clinical presentation ranging from nondisplaced rib fractures causing limited, manageable pain to severely displaced rib fractures with concomitant thoracic injuries leading to respiratory failure. Due to an evolution of techniques, hardware technology, and general acceptance, rib plating has increased substantially at trauma centers all throughout the United States over the past decade. This article aims to review the most recent and current reports for rib plating with respect to indications, preoperative evaluation and imaging, approaches, timing for intervention, outcomes in patients with flail chest and nonflail injuries, and the management of complications. From these data, it becomes clear that the surgical stabilization of rib fractures (SSRF) has a firm place in the management of thoracic trauma.

Surgical Rib Fixation of Multiple Rib Fractures and Flail Chest: A Systematic Review and Meta-Analysis

BACKGROUND

Multiple rib fractures and flail chest are common in trauma patients and may result in significant morbidity and mortality. While rib fractures have historically been treated conservatively, there is increasing interest in the benefits of surgical fixation. However, strong evidence that supports surgical rib fixation and identifies the most appropriate patients for its application is currently sparse.

METHODS

A systematic review and meta-analysis following PRISMA guidelines was performed to identify all peer-reviewed papers that examined surgical compared to conservative management of rib fractures. We undertook a subgroup analysis to determine the specific effects of rib fracture type, age, the timing of fixation and study design on outcomes. The primary outcomes were the length of hospital and ICU stay, and secondary outcomes included mechanical ventilation time, rates of pneumonia, and mortality.

RESULTS

Our search identified 45 papers in the systematic review, and 40 were included in the meta-analysis. There was a statistical benefit of surgical fixation compared to conservative management of rib fractures for length of ICU stay, mechanical ventilation, mortality, pneumonia, and tracheostomy. The subgroup analysis identified surgical fixation was most favorable for patients with flail chest and those who underwent surgical fixation within 72 h. Patients over 60 y had a statistical benefit of conservative management on length of hospital stay and mechanical ventilation.

CONCLUSIONS

Surgical fixation of flail and multiple rib fractures is associated with a reduction in morbidity and mortality outcomes compared to conservative management. However, careful selection of patients is required for the appropriate application of surgical rib fixation.

Discrepancies in rib fracture severity between radiologist and surgeon: A retrospective review

BACKGROUND

Chest computed tomography (CT) scans are important for the management of rib fracture patients, especially when determining indications for surgical stabilization of rib fractures (SSRFs). Chest CTs describe the number, patterns, and severity of rib fracture displacement, driving patient management and SSRF indications. Literature is scarce comparing radiologist versus surgeon rib fracture description. We hypothesize there is significant discrepancy between how radiologists and surgeons describe rib fractures.

METHODS

This was an institutional review board-approved, retrospective study conducted at a Level I academic center from December 2016 to December 2017. Adult patients (≥18 years of age) suffering rib fractures with a CT chest where included. Basic demographics were obtained. Outcomes included the difference between radiologist versus surgeon description of rib fractures and differences in the number of fractures identified. Rib fracture description was based on current literature: 1, nondisplaced; 2, minimally displaced (<50% rib width); 3, severely displaced (≥50% rib width); 4, bicortically displaced; 5, other. Descriptive analysis was used for demographics and paired t test for statistical analysis. Significance was set at p = 0.05.

RESULTS

Four hundred and ten patients and 2,337 rib fractures were analyzed. Average age was 55.6(±20.6); 70.5% were male; median Injury Severity Score was 16 (interquartile range, 9-22) and chest Abbreviated Injury Scale score was 3 (interquartile range, 3-3). For all descriptive categories, radiologists consistently underappreciated the severity of rib fracture displacement compared with surgeon assessment and severity of displacement was not mentioned for 35% of rib fractures. The mean score provided by the radiologist was 1.58 (±0.63) versus 1.78 (±0.51) by the surgeon (p < 0.001). Radiologists missed 138 (5.9%) rib fractures on initial CT. The sensitivity of the radiologist to identify a severely displaced rib fracture was 54.9% with specificity of 79.9%.

CONCLUSION

Discrepancy exists between radiologist and surgeon regarding rib fracture description on chest CT as radiologists routinely underappreciate fracture severity. Surgeons need to evaluate CT scans themselves to appropriately decide management strategies and SSRF indications.

LEVEL OF EVIDENCE

Prognostic/Diagnostic Test, level III.

A randomized clinical trial of single dose liposomal bupivacaine versus indwelling analgesic catheter in patients undergoing surgical stabilization of rib fractures

INTRODUCTION

Locoregional analgesia (LRA) remains underused in patients with chest wall injuries. Surgical stabilization of rib fractures (SSRF) offers an opportunity to deliver surgeon-directed LRA under direct visualization at the site of surgical intervention. We hypothesized that a single-dose liposomal bupivacaine (LB) intercostal nerve block provides comparable analgesia to an indwelling, peripheral nerve plane analgesic catheter with continuous bupivacaine infusion (IC), each placed during SSRF.

METHODS

Noninferiority, single-center, randomized clinical trial (2017-2020) was performed. Patients were randomized to receive either IC or LB during SSRF. The IC was tunneled into the surgical field (subscapular space), and LB involved thoracoscopic intercostal blocks of ribs 3 to 8. The primary outcome was the Sequential Clinical Assessment of Respiratory Function score, measured daily for 5 days postoperatively. Secondary outcomes included daily narcotic equivalents and failure of primary LRA, defined as requiring a second LRA modality.

RESULTS

Thirty-four patients were enrolled: 16 IC and 18 LB. Age, Injury Severity Score, RibScore, Blunt Pulmonary Contusion Score, and use of nonnarcotic analgesics was similar between groups. Duration of IC was 4.5 days. There were three failures in the IC group versus one in the LB group (p = 0.23). There was no significant difference in Sequential Clinical Assessment of Respiratory Function score between the IC and LB groups. On postoperative days 2 to 4, narcotic requirements were less than half in the LB, as compared with the IC group; however, this difference was not statistically significant. Average wholesale price was US $605 for IC and US $434 for LB.

CONCLUSION

In this noninferiority trial, LB provided at least comparable and potentially superior LRA as compared with IC among patients undergoing SSRF.

LEVEL OF EVIDENCE

Therapeutic, level II.

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

BACKGROUND

Publications investigating the efficacy of surgical stabilization of rib fractures (SSRF) have increased exponentially. However, there is currently no standardized reporting structure for these studies, rendering both comparisons and extrapolation problematic.

METHODS

A subject matter expert group was formed by the Chest Wall Injury Society. This group conducted a review of the SSRF investigational literature and identified variable reporting within several general categories of relevant parameters. A compliment of guidelines was then generated.

RESULTS

The reporting guidelines consist of 26 recommendations in the categories of: (1) study type, (2) patient and injury characteristics, (3) patient treatments, (4) outcomes, and (5) statistical considerations.

CONCLUSION

Our review identified inconsistencies in reporting within the investigational SSRF literature. In response to these inconsistencies, we propose a set of recommendations to standardize reporting of original investigations into the efficacy of SSRF.

Surgical stabilization of rib fractures in octogenarians and beyond-what are the outcomes?

BACKGROUND

Prospective studies of surgical stabilization of rib fractures (SSRF) have excluded elderly patients, and no study has exclusively addressed the ≥80-year-old subgroup. We hypothesized that SSRF is associated with decreased mortality in trauma patients 80 years or older.

METHODS

Multicenter retrospective cohort study involving eight centers. Patients who underwent SSRF from 2015 to 2020 were matched to controls by study center, age, injury severity score, and presence of intracranial hemorrhage. Patients with chest Abbreviated Injury Scale score less than 3, head Abbreviated Injury Scale score greater than 2, death within 24 hours, and desire for no escalation of care were excluded. A subgroup analysis compared early (0-2 days postinjury) to late (3-7 days postinjury) SSRF. Poisson regression accounting for clustered data by center calculated the relative risk (RR) of the primary outcome of mortality for SSRF versus nonoperative management.

RESULTS

Of 360 patients, 133 (36.9%) underwent SSRF. Compared with nonoperative patients, SSRF patients were more severely injured and more likely to receive locoregional analgesia. There were 31 hospital deaths among the entire sample (8.6%). Multivariable regression demonstrated a decreased risk of mortality for the SSRF group, as compared with the nonoperative group (RR, 0.41; 95% confidence interval, 0.24-0.69; p < 0.01). However, SSRF patients were more likely to develop pneumonia, and had an increased duration of both mechanical ventilation and intensive care unit stay. There were no differences in discharge destination, although the SSRF group was less likely to be discharged on narcotics (RR, 0.66; 95% confidence interval, 0.48-0.90; p = 0.01). There was no difference in adjusted mortality between the early and late SSRF subgroups.

CONCLUSION

Patients selected for SSRF were substantially more injured versus those managed nonoperatively. Despite this, SSRF was independently associated with decreased mortality. With careful patient selection, SSRF may be considered a viable treatment option in octogenarian/nonagenarians.

LEVEL OF EVIDENCE

Therapeutic, Level IV.

Nationwide cost-effectiveness analysis of surgical stabilization of rib fractures by flail chest status and age groups

BACKGROUND

Surgical stabilization of rib fracture (SSRF) is increasingly used to manage patients with rib fractures. Benefits of performing SSRF appear variable, and the procedure is costly, necessitating cost-effectiveness analysis for distinct subgroups. We aimed to assess the cost-effectiveness of SSRF versus nonoperative management among patients with rib fractures younger than 65 years versus 65 years or older, with versus without flail chest. We hypothesized that, compared with nonoperative management, SSRF is cost-effective only for patients with flail chest.

METHODS

This economic evaluation used a decision-analytic Markov model with a lifetime time horizon incorporating US population-representative inputs to simulate benefits and risks of SSRF compared with nonoperative management. We report quality-adjusted life years (QALYs), costs, and incremental cost-effectiveness ratios. Deterministic and probabilistic sensitivity analyses accounted for most plausible clinical scenarios.

RESULTS

Compared with nonoperative management, SSRF was cost-effective for patients with flail chest at willingness-to-pay threshold of US $150,000/QALY gained. Surgical stabilization of rib fracture costs US $25,338 and US $123,377/QALY gained for those with flail chest younger than 65 years and 65 years or older, respectively. Surgical stabilization of rib fracture was not cost-effective for patients without flail chest, costing US $172,704 and US $243,758/QALY gained for those younger than 65 years and 65 years or older, respectively. One-way sensitivity analyses showed that, under most plausible scenarios, SSRF remained cost-effective for subgroups with flail chest, and nonoperative management remained cost-effective for patients older than 65 years without flail chest. Probability that SSRF is cost-effective ranged from 98% among patients younger than 65 years with flail chest to 35% among patients 65 years or older without flail chest.

CONCLUSIONS

Surgical stabilization of rib fracture is cost-effective for patients with flail chest. Surgical stabilization of rib fracture may be cost-effective in some patients without flail chest, but delineating these patients requires further study.

LEVEL OF EVIDENCE

Economic/decision, level II.

Surgical stabilization of rib fractures is associated with improved survival but increased acute respiratory distress syndrome

Background

How the surgical stabilization of rib fractures after trauma affects the development of acute respiratory distress syndrome and impacts survival has yet to be determined in a large database. We hypothesized that surgical stabilization of rib fractures would not decrease the incidence of acute respiratory distress syndrome.

Methods

The National Trauma Data Bank was queried for all traumatic rib fractures in 2016. Patients were divided into groups with single rib fractures, multiple rib fractures, and flail chest. Nonoperative therapy was compared with stabilization of rib fractures of 1 to 2 ribs or 3+ ribs.

Results

There were 114,972 total patients with rib fractures meeting inclusion criteria, with 5,106 (4.4%) having flail chest, 24,726 (21.5%) having single rib fractures, and 85,140 (74.1%) having multiple rib fractures. Those with flail chest (15.9%) were most likely to get rib plating in comparison to multiple rib fractures (0.9%) and single rib fractures (0.2%); P < .001. On logistic regression, surgical stabilization of rib fractures 1 to 2 ribs (odds ratio: 0.17, 95% confidence interval: 0.10–0.28) or 3+ ribs (odds ratio: 0.17, 95% confidence interval: 0.11–0.28), with nonoperative therapy as the reference was associated with survival. Variables associated with mortality included increasing age, male sex, increasing injury severity score, decreased Glasgow coma scale, requirement of transfusions, and hypotension on admission. Surgical stabilization of rib fractures 3+ ribs (odds ratio: 2.30, 95% confidence interval: 1.58–3.37) was associated with acute respiratory distress syndrome but not 1 to 2 ribs (odd ratio: 1.55, 95% confidence interval: 0.97–2.48). On logistic regression of only patients with flail chest, stabilization of rib fractures was associated with decreased mortality but not increased risk of acute respiratory distress syndrome.

Conclusion

The increased risk of acute respiratory distress syndrome should be considered in the preoperative assessment for stabilization of rib fractures.

Quantifying the expense of deferring surgical stabilization of rib fractures: Operative management of rib fractures is associated with significantly lower charges

INTRODUCTION

Surgical stabilization of rib fractures (SSRF) remains a relatively controversial operation, which is often deferred because of concern about expense. The objective of this study was to determine the charges for SSRF versus medical management during index admission for rib fractures. We hypothesize that SSRF is associated with increased charge as compared with medical management.

METHODS

This is a retrospective chart review of a prospectively maintained database of patients with ≥3 displaced rib fractures admitted to a level 1 trauma center from 2010 to 2019. Patients who underwent SSRF (operative management [OM]) were compared with those managed medically (nonoperative management [NOM]). The total hospital charge between OM and NOM was compared with univariate analysis, followed by backward stepwise regression and mediation analysis.

RESULTS

Overall, 279 patients were included. The majority (75%) were male, the median age was 54 years, and the median Injury Severity Scale score (ISS) was 21. A total of 182 patients underwent OM, whereas 97 underwent NOM. Compared with NOM, OM patients had a lower ISS (18 vs. 22, p = 0.004), less traumatic brain injury (14% vs. 31%, p = 0.0006), shorter length of stay (10 vs. 14 days, p = 0.001), and decreased complications. After controlling for the differences between OM and NOM patients, OM was significantly associated with decreased charges (β = US $35,105, p = 0.01). Four other predictors, with management, explained 30% of the variance in charge (R = 0.30, p < 0.0001): scapular fracture (β = US $471,967, p < 0.0001), ISS per unit increase (β = US $4,139, p < 0.0001), long bone fracture (β = US $52,176, p = 0.01), bilateral rib fractures (β = US $34,392, p = 0.01), and Glasgow Coma Scale per unit decrease (β = US $17,164, p < 0.0001). The difference in charge between NOM and OM management was most strongly, although only partially, mediated by length of stay.

CONCLUSION

Our analysis found that OM, as compared with NOM, was independently associated with decreased hospital charges. These data refute the prevailing notion that SSRF should be withheld because of concerns for increased cost.

LEVEL OF EVIDENCE

Economic, level II.

Rescue Re-Do Inline Osteosynthesis with Wire Cerclage for Failed Rib Plating of Multilevel Rib Nonunion

Rib nonunion is a rare occurrence that requires surgical management and has a high rate of failure that may necessitate repeated intervention. We present the case of successful rescue redo repair of previously failed plating of chronic nonunion for multilevel posterior rib fractures, reinforced by wire cerclage of the osteosynthesis plate. Our objective is to illustrate the feasibility of repeated interventions, and the technique to resolve this challenging problem.