Surgical stabilization of traumatic rib fractures is associated with reduced readmissions and increased survival

The Next Generation: Surgeon Learning Curve in a Mature Operative Rib Management Program

INTRODUCTION

Prior work has demonstrated utility in using operative time to measure surgeon learning for surgical stabilization of rib fractures (SSRF); however, no studies have used operative time to evaluate the benefit of proctoring in subsequent generations of surgeons. We sought to evaluate whether there is a difference in learning between an original series (TOS) of self-taught surgeons versus the next generation (TNG) of proctored surgeons using cumulative summation (CUSUM) analysis. We hypothesized that TNG would have a comparatively accelerated learning curve.

METHODS

A single-center retrospective review of all SSRF at a level 1 trauma center was performed. Data were collected from the beginning of an operative chest injury program to include at least 2 y of TNG experience. Operative time was used to determine success and misstep based on prior methods. Learning curves using CUSUM analysis were calculated based on an anticipated success rate of 90% and compared between TOS and TNG groups.

RESULTS

Over 7 y, 163 patients with a median Injury Severity Score of 24 underwent SSRF. Median operative time was 165 min with a 0.5 plate-to-fracture ratio. All three TOS surgeons experienced a positive slope indicative of early missteps for their first 15-20 cases. By contrast, all three TNG surgeons demonstrated a series of early successes resulting in negative CUSUM slopes which coincided with a period of proctoring. By the end of TNG series, the composite cumulative score was less than half of the TOS surgeon' scores.

CONCLUSIONS

Operative time continues to be a useful surrogate for observing SSRF learning curves. In a mature institutional program, proctored novice surgeons appear to have an accelerated learning curve compared to novice surgeons developing a new operative rib program.

Age-Neutral Surgical Stabilization of Rib Fractures: Breaking the Ageism Barrier

INTRODUCTION

Surgical stabilization of rib fractures (SSRF) is associated with lower rates of mortality and fewer complications. This study evaluates whether the decision to undergo SSRF is associated with age, race, ethnicity, and insurance status and assesses associated clinical outcomes.

METHODS

This retrospective analysis included patients ≥45 y old with rib fractures who underwent SSRF in the Trauma Quality Improvement Program from 2016 to 2020. Race, ethnicity, and insurance statuses were collected. Age in years was dichotomized into two groups: 45-64 and 65+. Outcomes included ventilator-associated pneumonia, unplanned endotracheal intubation, acute respiratory distress syndrome, in-hospital mortality, failure to rescue (FTR) after major complications, and FTR after respiratory complications. Logistic regression models were fit to evaluate outcomes, controlling for gender, body mass index, Injury Severity Score, flail chest, chronic obstructive pulmonary disease, congestive heart failure, and smoking.

RESULTS

Two thousand eight hundred thirty-nine patients aged 45-64 and 1828 patients aged 65+ underwent SSRF. No significant difference in clinical outcomes was noted between these groups. Analysis showed that the association of SSRF with ventilator-associated pneumonia, unplanned intubation, acute respiratory distress syndrome, in-hospital mortality, FTR after a major complication, or FTR after a respiratory complication did not vary by age (P > 0.05). Black (odds ratio [OR] 0.67; 95% confidence interval [CI]: 0.59-0.77; P < 0.001), Hispanic (OR 0.80; 95% CI: 0.71-0.91; P < 0.001), and Medicaid (OR = 0.85; 95% CI = 0.76-0.95; P = 0.005) patients were less likely to receive SSRF.

CONCLUSIONS

No differences in clinical outcomes were measured between adults aged 45-64 and ≥65 who underwent SSRF. Older age should not preclude patients from receiving SSRF. Further work is needed to improve underutilization in Black, Hispanic and Medicaid patients.

Splenic rupture after surgical fixation of rib fractures with video-assisted thoracoscopic surgery: A case report

INTRODUCTION

Recently, the utilization of surgical stabilization of rib fractures (SSRF) with video-assisted thoracoscopic surgery (VATS) has been increasing owing to its effectiveness. The present report describes the case of a patient who underwent SSRF with VATS and subsequently developed a splenic rupture that was speculated to be related to intrathoracic manipulation during surgery.

PRESENTATION OF CASE

A 62-year-old male patient sustained injuries from a fallen festival car over his thoracoabdominal zone and was diagnosed with bilateral multiple rib fractures and burst fractures of the twelfth thoracic and first lumbar vertebrae. The patient underwent SSRF with VATS. Following surgery, the patient went into hemorrhagic shock due to a splenic rupture, necessitating an emergency open splenectomy.

DISCUSSION

Despite no initial detection of splenic injury on contrast-enhanced CT, it is possible that a slight splenic injury existed at the time of the initial diagnosis. Moreover, during surgery, additional external forces may have been applied to the spleen due to positional changes, such as shifting to the lateral position or retracting the diaphragm using forceps; these manipulations could have potentially caused a slight splenic injury, possibly leading to splenic rupture.

CONCLUSION

When performing SSRF through VATS, it is important to recognize that manipulation and traction of the diaphragm could potentially cause splenic rupture, even if a slight force is applied. Therefore, the diaphragm should be evaluated without traction and manipulation whenever possible.

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.

The effectiveness of early surgical stabilization for multiple rib fractures: a multicenter randomized controlled trial

INTRODUCTION

Multiple rib fractures (≥ 3 displaced rib fractures and/or flail chest) are severe chest trauma with high morbidity and mortality. Rib fixation has become the first choice for multiple rib fracture treatment. However, the timing of surgical rib fixation is unclear.

MATERIALS AND METHODS

The present study explored whether early rib fracture fixation can improve the outcome of multiple rib fractures. The present research included patients who were hospitalized in three Jiangsu hospitals following diagnosis with multiple rib fractures. Patients received early rib fracture fixation (≤ 48 h) or delayed rib fracture fixation (> 48 h) utilizing computer-based random sequencing (in a 1:1 ratio). The primary outcome measures included hospital length of stay, intensive care unit (ICU) stay, mechanical ventilation, inflammatory cytokine levels, infection marker levels, infection, and mortality.

RESULTS

A total of 403 individuals were classified into two groups, namely, the early group (n = 201) and the delayed group (n = 202). Patients belonging to the two groups had similar baseline clinical data, and there were no statistically significant differences between them. Early rib fracture fixation greatly decreased the length of stay in the ICU (4.63 days vs. 6.72 days, p < 0.001), overall hospital stay (10.15 days vs. 12.43 days, p < 0.001), ventilation days (3.67 days vs. 4.55 days, p < 0.001), and hospitalization cost (6900 USD vs. 7600 USD, p = 0.008). Early rib fracture fixation can decrease inflammatory cytokine levels and infection marker levels, prevent hyperinflammation and improve infection in patients with multiple rib fractures. The timing of rib fracture fixation does not influence the surgical procedure time, operative blood loss, 30-day all-cause mortality, or surgical site infection.

CONCLUSION

The findings from the present research indicated that early rib fracture fixation (≤ 48 h) is a safe, rational, effective and economical strategy and worth clinical promotion.

Outcomes of surgical versus nonsurgical treatment for multiple rib fractures: A US hospital matched cohort database analysis

BACKGROUND

Treatment for multiple rib fractures includes surgical stabilization of rib fractures (SSRF) or nonoperative management (NOM). Meta-analyses have demonstrated that SSRF results in faster recovery and lower long-term complication rates versus NOM. Our study evaluated postoperative outcomes for multiple rib fracture patients following SSRF versus NOM in a real-world, all-comer study design.

METHODS

Multiple rib fracture patients with inpatient admissions in the PREMIER hospital database from October 1, 2015, to September 30, 2020, were identified. Outcomes included discharge disposition, and 3- and 12-month lung-related readmissions. Demographics, comorbidities, concurrent injuries at index, Abbreviated Injury Scale and Injury Severity Scores, and provider characteristics were determined for all patients. Patients were excluded from the cohort if they had a thorax Abbreviated Injury Scale score of <2 (low severity patient) or a Glasgow Coma Scale score of ≤8 (extreme high severity patient). Stratum matching between SSRF and NOM patients was performed using fine stratification and weighting so that all patient data were kept in the final analysis. Outcomes were analyzed using generalized linear models with quasinormal distribution and logit links.

RESULTS

A total of 203,450 patients were included, of which 200,580 were treated with NOM and 2,870 with SSRF. Compared to NOM, patients with SSRF had higher rates of home discharge (62% SSRF vs. 58% NOM) and lower rates of lung-related readmissions (3 months, 3.1% SSRF vs. 4.0% NOM; 12 months, 6.2% SSRF vs. 7.6% NOM). The odds ratio (OR) for home or home health discharge in patients with SSRF versus NOM was 1.166 (95% confidence interval [CI], 1.073-1.266; p = 0.0002). Similarly, ORs for lung-related readmission at 3- and 12-month were statistically lower in the patients treated with SSRF versus NOM (OR [3 months], 0.764 [95% CI, 0.606-0.963]; p = 0.0227 and OR [12 months], 0.799 [95% CI, 0.657-0.971]; p = 0.0245).

CONCLUSION

Surgical stabilization of rib fractures results in greater odds of home discharge and lower rates of lung-related readmissions compared with NOM at 12 months of follow-up.

LEVEL OF EVIDENCE

Therapeutic/Care Management; Level III.

Educational assessment of intrathoracic and extrathoracic surgical stabilization of rib fractures

BACKGROUND

Surgical stabilization of rib fractures (SSRF) is being done with increased frequency and new advances. Intrathoracic SSRF is a new less invasive approach compared to the traditional extrathoracic plating procedure. Educational assessment can be done through descriptive analysis of learning curves with operation time used as a proxy measurement for learning. The objective of this level 3 observational cohort study is to assess the learning curve of introducing the intrathoracic method of plating at a large academic medical institution.

METHODS

Intrathoracic surgical stabilization of rib fractures was introduced at a tertiary trauma center in March of 2019. All patients that received SSRF beginning 11/2017 were included. Patients with abbreviated injury scale score of the head, abdomen, extremity, or face greater than three and days from injury to SSRF greater than 4 were excluded. Operation time was determined from time of incision to completion of skin closure. Time per fracture and time per plate were calculated using total operation time. Learning curves and CUSUM graphs for individual surgeons that had completed in more than 3 SSRF cases were generated using and trended for statistical significance.

RESULTS

After exclusions, there were 38 patients with extrathoracic SSRF between November 2017-September 2021 and 24 patients with intrathoracic plating between March 2019-Sept. 2021. There were 5 fellows and 6 residents that performed extrathoracic SSRF. Four fellows and 2 residents performed intrathoracic SSRF. Graphs of time per fracture and time per plate over time produced learning curves without an inflection point for extrathoracic or intrathoracic SSRF in any of the following categories: all surgeries (Figs. 1 and 2), academic year (July to June), individual attending surgeons, fellows, or residents.

CONCLUSION

There was no discernible inflection point on the generated learning curves. Time per plate and time per fracture did not decrease as surgeons gained more experience. Introducing intrathoracic SSRF in a large academic hospital may not need to account for a learning curve adjustment period.

DeepBackRib: Deep learning to understand factors associated with readmissions after rib fractures

BACKGROUND

Deep neural networks yield high predictive performance, yet obscure interpretability limits clinical applicability. We aimed to build an explainable deep neural network that elucidates factors associated with readmissions after rib fractures among nonelderly adults, termed DeepBackRib . We hypothesized that DeepBackRib could accurately predict readmissions and a game theoretic approach to elucidate how predictions are made would facilitate model explainability.

METHODS

We queried the 2017 National Readmissions Database for index hospitalization encounters of adults aged 18 to 64 years hospitalized with multiple rib fractures. The primary outcome was 3-month readmission(s). Study cohort was split 60-20-20 into training-validation-test sets. Model input features included demographic/injury/index hospitalization characteristics and index hospitalization International Classification of Diseases, Tenth Revision , diagnosis codes. The seven-layer DeepBackRib comprised multipronged strategies to mitigate overfitting and was trained to optimize recall. Shapley additive explanation analysis identified the marginal contribution of each input feature for predicting readmissions.

RESULTS

A total of 20,260 patients met the inclusion criteria, among whom 11% (n = 2,185) experienced 3-month readmissions. Feature selection narrowed 3,164 candidate input features to 61, and DeepBackRib yielded 91%, 85%, and 82% recall on the training, validation, and test sets, respectively. Shapley additive explanation analysis quantified the marginal contribution of each input feature in determining DeepBackRib's predictions: underlying chronic obstructive pulmonary disease and long index hospitalization length of stay had positive associations with 3-month readmissions, while private primary payer and diagnosis of pneumothorax during index admission had negative associations.

CONCLUSION

We developed and internally validated a high-performing deep learning algorithm that elucidates factors associated with readmissions after rib fractures. Despite promising predictive performance, standalone deep learning algorithms are insufficient for clinical prediction tasks: a concerted effort is needed to ensure that clinical prediction algorithms remain explainable.

LEVEL OF EVIDENCE

Prognostic and Epidemiological; Level III.

Surgical stabilization of rib fractures versus nonoperative treatment in patients with multiple rib fractures following cardiopulmonary resuscitation: An international, retrospective matched case-control study

BACKGROUND

The presence of six or more rib fractures or a displaced rib fracture due to cardiopulmonary resuscitation (CPR) has been associated with longer hospital and intensive care unit (ICU) length of stay (LOS). Evidence on the effect of surgical stabilization of rib fractures (SSRF) following CPR is limited. This study aimed to evaluate outcomes after SSRF versus nonoperative management in patients with multiple rib fractures after CPR.

METHODS

An international, retrospective study was performed in patients who underwent SSRF or nonoperative management for multiple rib fractures following CPR between January 1, 2012, and July 31, 2020. Patients who underwent SSRF were matched to nonoperative controls by cardiac arrest location and cause, rib fracture pattern, and age. The primary outcome was ICU LOS.

RESULTS

Thirty-nine operatively treated patient were matched to 66 nonoperatively managed controls with comparable CPR-related characteristics. Patients who underwent SSRF more often had displaced rib fractures (n = 28 [72%] vs. n = 31 [47%]; p = 0.015) and a higher median number of displaced ribs (2 [P 25 -P 75 , 0-3] vs. 0 [P 25 -P 75 , 0-3]; p = 0.014). Surgical stabilization of rib fractures was performed at a median of 5 days (P 25 -P 75 , 3-8 days) after CPR. In the nonoperative group, a rib fixation specialist was consulted in 14 patients (21%). The ICU LOS was longer in the SSRF group (13 days [P 25 -P 75 , 9-23 days] vs. 9 days [P 25 -P 75 , 5-15 days]; p = 0.004). Mechanical ventilator-free days, hospital LOS, thoracic complications, and mortality were similar.

CONCLUSION

Despite matching, those who underwent SSRF over nonoperative management for multiple rib fractures following CPR had more severe consequential chest wall injury and a longer ICU LOS. A benefit of SSRF on in-hospital outcomes could not be demonstrated. A low consultation rate for rib fixation in the nonoperative group indicates that the consideration to perform SSRF in this population might be associated with other nonradiographic or injury-related variables.

LEVEL OF EVIDENCE

Therapeutic/Care Management; Level III.

Surgical Rib Fixation in Obese Patients with Isolated Flail Chest Improves Outcomes: A Matched Cohort Study

BACKGROUND

Obesity is associated with adverse outcomes after major operations. The role of operative rib fixation (RF) in obese patients with flail chest is not clear. The presence of other associated injuries may complicate the interpretation of outcomes. This study compared outcomes after RF to nonoperative management (NOM) in obese patients with isolated flail chest injury.

METHODS

Adult obese patients (BMI > 29.9) with flail chest were identified from the Trauma Quality Improvement Program (TQIP) database (2016-2018). Hospital transfers, death within 72 h, and extrathoracic injuries were excluded. RF patients were propensity score matched (1:2) to similar NOM patients. Multivariate regression identified independent factors predicting adverse outcomes.

RESULTS

Overall, 367 patients with isolated flail chest who underwent RF were matched with 734 in the NOM group. After matching, the mortality rate was significantly lower in the RF group (1.4% vs. 3.7%; p < 0.05). RF had longer HLOS (15.7 days vs. 12.8 days; p < 0.05) and ICU LOS (10.1 days vs. 8.6 days; p < 0.05), shorter ventilator days (9.2 days vs. 11.5 days; p < 0.05), and a higher rate of venous thromboembolism (7.1% vs. 3.5%, p < 0.05). On multivariate analysis, RF was associated with decreased mortality (OR 0.27; p < 0.05). Early RF (≤ 72 h) was associated with shorter ICU stay and mechanical ventilation.

CONCLUSION

RF for isolated flail chest in obese patients is associated with decreased mortality and fewer ventilator days. When performed early, fixation decreases the need for prolonged ventilator use and ICU stay. A more aggressive VTE prophylaxis should be considered in patients undergoing RF.

Lucky number 13: Association between center-specific chest wall stabilization volumes and patient outcomes

BACKGROUND

Chest wall stabilization (CWS) improves outcomes for patients with chest wall injury (CWI). We hypothesized that patients treated at centers with higher annual CWS volumes experience superior outcomes.

METHODS

A retrospective study of adults with acute CWI undergoing surgical stabilization of rib or sternal fractures within the 2019 Trauma Quality Improvement Program database, excluding those with 24-hour mortality or any Abbreviated Injury Scale body region of six, was conducted. Hospitals were grouped in quartiles by annual CWS volume. Our primary outcome was a composite of in-hospital mortality, ventilator-associated pneumonia, acute respiratory distress syndrome, sepsis, and unplanned intubation or intensive care unit readmission. Regression was controlled for age, sex, Injury Severity Scale, flail chest, medical comorbidities, and Abbreviated Injury Scale chest. We performed cut-point analysis and compared patient outcomes from high- and low-volume centers.

RESULTS

We included 3,207 patients undergoing CWS at 430 hospitals with annual volumes ranging from 1 to 66. There were no differences between groups in age, sex, or Injury Severity Scale. Patients in the highest volume quartile (Q4) experienced significantly lower rates of the primary outcome (Q4, 14%; Q3, 18.4%; Q2, 17.4%; Q1, 22.1%) and significantly shorter hospital and intensive care unit lengths of stay. Q4 versus Q1 had lower adjusted odds of the primary outcome (odds ratio, 0.58; 95% confidence interval, 0.43-0.80). An optimal cut point of 12.5 procedures annually was used to define high- and low-volume centers. Patients treated at high-volume centers experienced significantly lower rates of the primary composite outcome, in-hospital mortality, and deep venous thrombosis with shorter lengths of stay and higher rates of home discharge.

CONCLUSION

Center-specific CWS volume is associated with superior in-hospital patient outcomes. These findings support efforts to establish CWI centers of excellence. Further investigation should explore the impact of center-specific volume on patient-reported outcomes including pain and postdischarge quality of life.

LEVEL OF EVIDENCE

Prognostic and Epidemiologic; Level III.

Impact of Time of Surgery on the Outcome after Surgical Stabilization of Rib Fractures in Severely Injured Patients with Severe Chest Trauma—A Matched-Pairs Analysis of the German Trauma Registry

Purpose

In severely injured patients with multiple rib fractures, the beneficial effect of surgical stabilization is still unknown. The existing literature shows divergent results, and the indication and especially the right timing of an operation are the subject of a broad discussion. The aim of this study was to determine the influence of the time point of surgical stabilization of rib fractures (SSRF) on the outcome in a multicenter database with special regard to the duration of ventilation, intensive care, and overall hospital stay.

Methods

Data from the TraumaRegister DGU collected between 2010 and 2019 were used to evaluate patients above 16 years of age with severe rib fractures [Abbreviated Injury Score (AIS)  ≥ 3] who received an SSRF in a matched-pairs analysis. In this matched-pairs analysis, we compared the effects of an early SSRF within 48 h after initial trauma vs. late SSRF 3–10 days after trauma.

Results

After the selection process, we were able to find 142 matched pairs for further evaluation. Early SSRF was associated with a significantly shorter length of stay in the intensive care unit (16.2 days vs. 12.7 days, p = 0.020), and the overall hospital stay (28.5 days vs. 23.4 days, p = 0.005) was significantly longer in the group with late SSRF. Concerning the days on mechanical ventilation, we were able to demonstrate a trend for an approximately 1.5 day shorter ventilation time for patients after early SSRF, although this difference was not statistically significant (p = 0.226).

Conclusions

We were able to determine the significant beneficial effects of early SSRF resulting in a shorter intensive care unit stay and a shorter length of stay in hospital and additionally a trend to a shorter time on mechanical ventilation.

Surgical stabilization versus nonoperative treatment for flail and non-flail rib fracture patterns in patients with traumatic brain injury

Purpose

Literature on outcomes after SSRF, stratified for rib fracture pattern is scarce in patients with moderate to severe traumatic brain injury (TBI; Glasgow Coma Scale ≤ 12). We hypothesized that SSRF is associated with improved outcomes as compared to nonoperative management without hampering neurological recovery in these patients.

Methods

A post hoc subgroup analysis of the multicenter, retrospective CWIS-TBI study was performed in patients with TBI and stratified by having sustained a non-flail fracture pattern or flail chest between January 1, 2012 and July 31, 2019. The primary outcome was mechanical ventilation-free days and secondary outcomes were in-hospital outcomes. In multivariable analysis, outcomes were assessed, stratified for rib fracture pattern.

Results

In total, 449 patients were analyzed. In patients with a non-flail fracture pattern, 25 of 228 (11.0%) underwent SSRF and in patients with a flail chest, 86 of 221 (38.9%). In multivariable analysis, ventilator-free days were similar in both treatment groups. For patients with a non-flail fracture pattern, the odds of pneumonia were significantly lower after SSRF (odds ratio 0.29; 95% CI 0.11–0.77; p = 0.013). In patients with a flail chest, the ICU LOS was significantly shorter in the SSRF group (beta, − 2.96 days; 95% CI − 5.70 to − 0.23; p = 0.034).

Conclusion

In patients with TBI and a non-flail fracture pattern, SSRF was associated with a reduced pneumonia risk. In patients with TBI and a flail chest, a shorter ICU LOS was observed in the SSRF group. In both groups, SSRF was safe and did not hamper neurological recovery.