Rib fracture displacement worsens over time

Analysis of risk factors for poor healing and long-duration pain in conservative treatment of rib fractures

Rib fractures are a common injury following blunt chest trauma, accounting for approximately 10% of all traumatic injuries and up to 50% of blunt chest trauma cases. These fractures are associated with a high risk of complications, such as pneumothorax, hemothorax, and pulmonary infections, and can significantly impact respiratory function. This study analyzes the risk factors for poor healing and long-duration pain in the conservative treatment of rib fractures, providing a reference for clinicians in choosing conservative treatment and formulating treatment plans. A retrospective analysis was conducted on 342 patients who underwent conservative treatment for rib fractures from January 2023 to May 2024. Baseline data, clinical data, and follow-up data were collected. Comparisons were made between the poor healing group and the good healing group, as well as between the long-duration pain group and the short-duration pain group in the conservative treatment of rib fractures. Univariate and multivariate logistic regression analyses were performed to identify risk factors for poor healing and long-duration pain. In patients undergoing conservative treatment for rib fractures, the average duration of pain was 12.18 ± 10.78 days, with an incidence of pulmonary complications of 59.06% (202/342) and poor healing rate of 6.43% (22/342). Significant differences were observed between the good and poor healing groups in terms of age (P = .018), presence of coronary heart disease (CHD, P = .023), chronic obstructive pulmonary disease (COPD, P < .001), blood calcium (P = .007), and alkaline phosphatase (P < .001). Similarly, significant differences were found between the long-duration and short-duration pain groups in age (P = .039), presence of diabetes (P < .001), CHD (P < .001), COPD (P < .001), and alkaline phosphatase (P < .001). Multivariate analysis identified COPD (P = .015), blood calcium (P = .013), and alkaline phosphatase (P = .006) as independent risk factors for poor healing, while diabetes (P = .001), CHD (P = .014), and alkaline phosphatase (P < .001) were independent risk factors for prolonged pain duration. COPD, blood calcium, and alkaline phosphatase are independent risk factors for poor healing in conservative treatment of rib fractures. Diabetes, CHD, and alkaline phosphatase are independent risk factors for long-duration pain in conservative treatment of rib fractures.

Comparison of patients who meet criteria for surgical stabilization of rib fractures versus those who actually get rib fixation: A single center review

BACKGROUND

Surgical stabilization of rib fractures (SSRF) has shown benefits for rib fracture patients. However, the incidence of SSRF performed remains low. We compare our institution's rib fracture patients meeting criteria for SSRF versus those actually receiving the operation, hypothesizing a significant portion are not undergoing SSRF.

METHODS

A retrospective review of rib fracture patients presenting to our Level 1 trauma center from 1/2016 to 4/2023. Patients were categorized as those who met SSRF inclusion criteria versus those who didn't based on the 2023 Chest Wall Injury Society (CWIS) SSRF Guidelines. Basic demographics were obtained. Patients meeting SSRF criteria were divided into those who received SSRF versus those who didn't. Outcomes of interest included type and frequency of SSRF indications and frequency of absolute/relative contraindications. Descriptive statistics were used. Median test and t-test were used for statistical analysis. Statistical significance was set at p < 0.05.

RESULTS

A total of 3,432 patients presented with ≥1 rib fracture(s). Of those, 1,573(45.8 %) met SSRF inclusion criteria. These patients were predominantly male, with mean age of 57.4(±18.5) and a similar Injury Severity Score but significantly higher chest-Abbreviated Injury Score of 3 (Interquartile range 3,4)(p = 0.048). Only 458(29.1 %) patients underwent SSRF, leaving 1,115(70.9 %) managed non-operatively, of which 215(19.3 %) were ventilated and "failure to wean from the ventilator" was the most common (81.4 %) indication for SSRF. Of the 900(80.7 %) non-ventilated patients managed non-operatively, 659 (69.9 %) had ≥two indications for SSRF, 382(34.3 %) had zero relative contraindications and 394(35.3 %) had one relative contraindication for SSRF. Lastly, 52.6 % of patients in this cohort had reported "clicking/popping" of their fractures.

CONCLUSION

Only 29.1 % of patients meeting criteria for SSRF had the operation based on data from our institution. There may be additional opportunity to benefit this cohort of patients meeting SSRF criteria but not undergoing surgery.

Surgical management of multiple rib fractures in polytrauma patients: semi-damage control surgery

Background: To investigate the timing and extent of surgery for rib fractures in polytrauma patients. Methods: Data from polytrauma patients who underwent early and partial rib fracture fixation after successful resuscitation were retrospectively analyzed. The study encompassed demographic data, clinical data, and outcomes. Results: In total, 71 patients with polytrauma were included. ISS ranged from 16 to 50 with a mean score of 25.3±7.5. The median lactate level was 3.6 mmol/L (IQR: 3.1 to 4.5), the median base deficit (BD) was 8.2 mmol/L (IQR: 6.4 to 9.8) and the shock index (SI) median was 1.2 (IQR: 0.9 to 1.3). Total fractured ribs in 71 patients were 726; individually, the minimum and maximum number of fractured ribs was 3 and 22, respectively (median, 10; mean, 10.2 ± 4.0). The average time to surgery was 42.9±42.6 h. Specifically, 41(57.7%) received the surgery within 24h and 52 (73.2%) patients received the surgery within 3 days following successful resuscitation. A total of 246 (33.9%) ribs underwent open reduction and internal fixation with plate, 3.46 ribs for each patient, with high frequencies of the 6th (49, 19.9%), 5th (46, 18.7%), 4th and 7th ribs (both 36, 14.6%). The average length of ICU stay was 11.5 ± 7.5 days and the duration of hospitalization was 16.3 ± 9.9 days. No surgical site infection or mortality was observed. Conclusions: Early and partial rib fracture fixation to restore the relative stability of the thorax is safe and effective for polytrauma patients after successful resuscitation. This surgery strategy is called semi-damage control surgery.

Global burden of fracture of sternum and/or ribs: An analysis of 204 countries and territories between 1990 and 2019

BACKGROUND

Sternum and rib fractures represent a significant global health concern, contributing to morbidity and disability on a worldwide scale. However, there is a notable lack of recent epidemiological data detailing the global and regional burden of these fractures.

METHODS

We undertook a systematic analysis of the prevalence of sternum and rib fractures at the global, regional, and national levels in 2019, while also examining time trends spanning from 1990 to 2019. To achieve this, we extracted data from the Global Burden of Disease Study 2019, enabling us to determine incidence, prevalence, years lived with disability (YLDs), and their corresponding age-standardized rates.

RESULTS

In 2019, there were 4.1 million incident cases and 2 million prevalent cases of sternum and rib fractures worldwide. These figures represent increases of 43.7 % and 64.1 %, respectively, since 1990. YLDs also exhibited a notable increase, rising by 62.4 % to reach 190,834 cases. However, since 1990, their equivalent age-standardized rates, which ranged from 5.5 % to 7.1 %, have decreased. Notably, China had the greatest incidence (1.2 million cases), prevalence (573,000 cases), and number of YLDs (55,400 cases), all in 2019. The greatest age-standardized incidence rate (143/100,000) and age-standardized prevalence rate (65/100,000) were both recorded in Greenland in the same year. It's critical to emphasize that men experience these fractures at considerably higher rates than women. Around 70 % of incident instances included unintentional injuries worldwide and across all regions. High-socioeconomic regions had the highest rates of incidence, prevalence, and YLDs, albeit these rates have declined by 6.4 % to 7.1 % since 1990, whereas low-middle and low-income areas have had rises.

CONCLUSIONS

This study, which spans the years 1990 to 2019, provides a thorough and current assessment of the global burden attributed to sternum and rib fractures. In terms of nations, regions, sociodemographic index (SDI) levels, age groups, genders, and reasons, it reveals significant variances and trends. The knowledge obtained from this study can be extremely useful in formulating health policy, allocating resources, and developing methods to prevent these injuries.

When more is more: Utilizing finite element analysis to assess chest wall injury stability after surgical stabilization of all rib fractures versus only a portion of the rib fractures

BACKGROUND

Surgical stabilization of rib fractures (SSRF) continues to gain acceptance. Controversary exists around the number of rib fractures needing stabilization. We sought to analyze chest wall stability (CWS) after SSRF using finite element analysis (FEA) modeling in various rib fracture patterns, hypothesizing not stabilizing all fractures leaves the chest wall unstable.

METHODS

FEA thoracic model development was described previously. Two fracture patterns with three case scenarios each were defined for right ribs 4 to 9. Fracture Pattern 1; Case 1-all 6 ribs with lateral fractures and no stabilization; Case 2-all six fractures stabilized; Case 3-only fractures 5 to 7 were stabilized. Fracture Pattern 2; Case 4-all six ribs fractured in a flail pattern (anterior-lateral and posterior-lateral) and no stabilization; Case 5-all 12 fractures stabilized; Case 6-only six anterior-lateral fractures were stabilized. Three assessment criteria were used to quantify thoracic motion: normalized mean absolute error (NMAE), normalized root mean square error (NRMSE), and normalized interfragmentary motion (NIFM).

RESULTS

Fracture Pattern 1: Case 1-NMAE and NRMSE analysis demonstrated significant loss of CWS up to 50% with left axial rotation; Case 2-CWS almost completely returned to nonfractured state; Case 3-CWS loss up to 37%. Fracture Pattern 2: Case 4-up to 49% of CWS lost with right axial rotation; Case 5-less than 3% CWS lost; Case 6-over 40% CWS lost. For both fracture patterns, when stabilizing all fractures, NIFM decreased by 95%. In Case 3, NIFM decreased by 56% and in Case 6, NIFM increased by 1% at the non-stabilized fracture line.

CONCLUSION

Stabilizing all rib fractures significantly improves CWS. Not stabilizing both fractures of a flail segment worsens motion at the non-stabilized fractures.

LEVEL OF EVIDENCE

Therapeutic/Care Management; Level IV.

[Treatment strategy for severe implosion injuries of the lateral chest wall]

In the majority of cases implosion injuries to the thoracic wall are caused by blunt, massive force acting on the thorax. Basically, different regions and directions of the acting energy have to be taken into account. In common usage, the term implosion injury has become established, especially for the sequelae of lateral energy impact. Particular attention should be paid to the stability of the shoulder girdle, the underlying hemithorax and its intrathoracic organs.

Better late than never-a single-center review of delayed rib fixation for symptomatic rib fractures and nonunions

BACKGROUND

Surgical stabilization of rib fractures (SSRFs) has become an emerging therapy for treatment of patients with rib fractures. More commonly, it is used in the acute setting; however, delayed SSRF can be utilized for symptomatic rib fracture nonunions. Here, we describe our institution's experience with delayed SSRF, hypothesizing it is safe and resolves patient symptoms.

METHODS

This is a retrospective review of patients presenting to our Level I trauma center to undergo delayed SSRF for symptomatic nonunions from January 2017 to September 2022. Delayed SSRF was defined as SSRF over 2 weeks in the outpatient setting. Basic demographics were obtained. Outcomes of interest included mean pain score (preoperatively and postoperatively), intensive care unit (ICU) and hospital length of stay (LOS), and resolution of preoperative symptoms, specifically chest wall instability, with return to activities of daily living (ADLs).

RESULTS

Forty-four patients met inclusion criteria with a total of 156 symptomatic nonunion rib fractures that received delayed SSRF. The average age was 59.2 ± 11.9 years and median number of days from injury to SSRF was 172.5 (interquartile range, 27.5-200). The average number rib fractures plated per patient 3.5 ± 1.8. Only three patients required ICU admission postoperatively for no longer than 2 days. Median hospital LOS was 2 days (interquartile range 1-3 days). Average preoperative and postoperative pain score was 6.8 ± 1.9 and 2.02 ± 1.5, respectively ( p < 0.001). Chest wall instability and preoperative symptoms resolved in 93.2% of patients postoperatively ( p < 0.001). Two patients (4.5%) had postoperative complications that resolved after additional surgical intervention. Rib fracture healing was demonstrated on radiographic imaging during postoperative follow-up.

CONCLUSION

Delayed SSRF is safe and demonstrates significant resolution of preoperative symptoms by decreasing pain, improving chest wall stability, and allowing patients to return to activities of daily living.

LEVEL OF EVIDENCE

Therapeutic/Care Management; Level IV.

Hardware Infection From Surgical Stabilization of Rib Fractures Is Lower Than Previously Reported

Introduction Surgical stabilization of rib fractures (SSRF) is an emerging therapy for the treatment of patients with traumatic rib fractures. Despite the demonstrated benefits of SSRF, there remains a paucity of literature regarding the complications from SSRF, especially those related to hardware infection. Currently, literature quotes hardware infection rates as high as 4%. We hypothesize that the hardware infection rate is much lower than currently published. Methods This is an IRB-approved, four-year multicenter descriptive review of prospectively collected data from January 2016 to June 2022. All patients undergoing SSRF were included in the study. Exclusion criteria included those patients less that 18 years of age. Basic demographics were obtained: age, gender, Injury Severity Score (ISS), Abbreviate Injury Scale-chest (AIS-chest), flail chest (yes/no), delayed SSRF more than two weeks (yes/no), number of patients with a pre-SSRF chest tube, and number of ribs fixated. Primary outcome was hardware infection. Secondary outcomes included mortality rate and hospital length of stay (HLOS). Basic descriptive statistics were utilized for analysis. Results A total of 453 patients met criteria for inclusion in the study. Mean age was 63 ± 15.2 years and 71% were male. Mean ISS was 17.3 ± 8.5 with a mean AIS-chest of 3.2 ± 0.5. Flail chest (three consecutive ribs with two or more fractures on each rib) accounted for 32% of patients. Forty-two patients (9.3%) underwent delayed SSRF. The average number of ribs stabilized was 4.75 ± 0.71. When analyzing the primary outcome, only two patients (0.4%) developed a hardware infection requiring reoperation to remove the plates. Overall HLOS was 10.5 ± 6.8 days. Five patients suffered a mortality (1.1%), all five with ISS scores higher than 15 suggesting significant polytrauma. Conclusion This is the largest case series to date examining SSRF hardware infection. The incidence of SSRF hardware infection is very low (<0.5%), much less than quoted in current literature. Overall, SSRF is a safe procedure with low morbidity and mortality.

Finite element analysis for better evaluation of rib fractures: A pilot study

INTRODUCTION

Modeling rib fracture stability is challenging. Computer-generated finite element analysis (FEA) is an option for assessment of chest wall stability (CWS). The objective is to explore FEA as a means to assess CWS, hypothesizing it is a reliable approach to better understand rib fracture pathophysiology.

METHODS

Thoracic anatomy was generated from standardized skeletal models with internal/external organs, soft tissue and muscles using Digital Imaging and Communications in Medicine data. Material properties were assigned to bone, cartilage, skin and viscera. Simulation was performed using ANSYS Workbench (2020 R2, Canonsburg, PA). Meshing the model was completed identifying 1.3 and 2.1 million elements and nodes. An implicit solver was used for a linear/static FEA with all bony contacts identified and applied. All material behavior was modeled as isotropic/linear elastic. Six load cases were evaluated from a musculoskeletal AnyBody model; forward flexion, right/left lateral bending, right/left axial rotation and 5-kg weight arm lifting. Standard application points, directions of muscle forces, and joint positions were applied. Ten fracture cases (unilateral and bilateral) were defined and 66 model variations were simulated. Forty-three points were applied to each rib in the mid/anterior axillary lines to assess thoracic stability. Three assessment criteria were used to quantify thoracic motion: normalized mean absolute error, normalized root mean square error, and normalized interfragmentary motion.

RESULTS

All three analyses demonstrated similar findings that rib fracture deformation and loss of CWS was highest for left/right axial rotation. Increased number of ribs fracture demonstrated more fracture deformation and more loss of CWS compared with a flail chest segment involving less ribs. A single rib fracture is associated with ~3% loss of CWS. Normalized interfragmentary motion deformation can increases by 230%. Chest wall stability can decrease by over 50% depending on fracture patterns.

CONCLUSION

Finite element analysis is a promising technology for analyzing CWS. Future studies need to focus on clinical relevance and application of this technology.

LEVEL OF EVIDENCE

Diagnostic Tests or Criteria; Level IV.

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.

The clinical characteristics and surgical treatment for delayed blunt thoracic aortic injury-a case series

BACKGROUND

Delayed thoracic aortic injury (DTAI) induced by left closed rib fractures (RFs) is a clinically rare blunt injury to the thoracic aorta with an insidious onset. DTAI is very prone to missed diagnosis due to the unreliability of using the initial post-injury computed tomography (CT) scan to explicitly detect any signs of an aortic injury, potentially leading to a fatal hemorrhage. Timely diagnosis and treatment are therefore key to preventing such deadly complications. With that said, not all cases of left RFs lead to delayed aortic injuries, so how can surgeons tell which cases are to be culled and focused on? Also, what kinds of treatment should be administered upon detection?

METHODS

A retrospective analysis was performed on the clinical data of DTAI cases induced by left closed RF that were admitted to our Hospital from June 2015 through June 2020. Injuries to the aortic tunica adventitia or the elastic layer were intraoperatively confirmed. CT scan findings, locations and numbers of RFs, as well as the choices of surgical procedure were reviewed postoperatively. In addition, a literature review was conducted to analyze characteristics shared by similar cases.

RESULTS

This study included 7 patients treated by our hospital and 8 reported in the literature. The broken ends of RFs causing aortic wall injury (including the tunica adventitia) were all found in the medial to the lateral erector spinae. All patients in our hospital received internal fixation for RFs and thoracoscopic removal of free bone fragments (if any). Concomitant injuries were managed either by simultaneous or staged surgery.

CONCLUSIONS

For multiple left RFs with the broken ends located in the inside of the lateral erector spinae, the number of fractured ribs ≥4 and a smaller number of fractured ribs with multiple fractures in a single rib are important factors for DTAI. Active surgical intervention is recommended for patients with these important factors. The specific intervention is tailored to each patient's particular needs to eliminate the risk of developing life-threatening thoracic aortic injury (TAI) and rupture.

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.

Detection of acute rib fractures on CT images with convolutional neural networks: effect of location and type of fracture and reader's experience

PURPOSE

The evaluation of all ribs on thin-slice CT images is time consuming and it can be difficult to accurately assess the location and type of rib fracture in an emergency. The aim of our study was to develop and validate a convolutional neural network (CNN) algorithm for the detection of acute rib fractures on thoracic CT images and to investigate the effect of the CNN algorithm on radiologists' performance.

METHODS

The dataset for development of a CNN consisted of 539 thoracic CT scans with 4906 acute rib fractures. A three-dimensional faster region-based CNN was trained and evaluated by using tenfold cross-validation. For an observer performance study to investigate the effect of CNN outputs on radiologists' performance, 30 thoracic CT scans (28 scans with 90 acute rib fractures and 2 without rib fractures) which were not included in the development dataset were used. Observer performance study involved eight radiologists who evaluated CT images first without and second with CNN outputs. The diagnostic performance was assessed by using figure of merit (FOM) values obtained from the jackknife free-response receiver operating characteristic (JAFROC) analysis.

RESULTS

When radiologists used the CNN output for detection of rib fractures, the mean FOM value significantly increased for all readers (0.759 to 0.819, P = 0.0004) and for displaced (0.925 to 0.995, P = 0.0028) and non-displaced fractures (0.678 to 0.732, P = 0.0116). At all rib levels except for the 1st and 12th ribs, the radiologists' true-positive fraction of the detection became significantly increased by using the CNN outputs.

CONCLUSION

The CNN specialized for the detection of acute rib fractures on CT images can improve the radiologists' diagnostic performance regardless of the type of fractures and reader's experience. Further studies are needed to clarify the usefulness of the CNN for the detection of acute rib fractures on CT images in actual clinical practice.

What is the optimal timing to perform surgical stabilization of rib fractures?

The practice of surgical stabilization of rib fractures (SSRF) for severe chest wall injury has exponentially increased over the last decade due to improved outcomes as compared to nonoperative management. However, regarding in-hospital outcomes, the ideal time from injury to SSRF remains a matter of debate. This review aims to evaluate and summarize currently available literature related to timing of SSRF. Nine studies on the effect of time to SSRF were identified. All were retrospective comparative studies with no detailed information on why patients underwent early or later SSRF. Patients underwent SSRF most often for a flail chest or ≥3 displaced rib fractures. Early SSRF (≤48-72 hours after admission) was associated with shorter hospital and intensive care unit length of stay (HLOS and ICU-LOS, respectively), duration of mechanical ventilation (DMV), and lower rates of pneumonia, and tracheostomy as well as lower hospitalization costs. No difference between early or late SSRF was demonstrated for mortality rate. As compared to nonoperative management, late SSRF (>3 days after admission), was associated with similar or worse in-hospital outcomes. The optimal time to perform SSRF in patients with severe chest wall injury is early (≤48-72 hours after admission) and associated with improved in-hospital outcomes as compared to either late salvage or nonoperative management. These data must however be cautiously interpreted due the retrospective nature of the studies and potential selection and attrition bias. Future research should focus on both factors and pathways that allow patients to undergo early SSRF.

Surgical stabilization of rib fractures combined with intercostal nerve cryoablation proves to be more cost effective by reducing hospital length of stay and narcotics

BACKGROUND

Intercostal nerve cryoablation (INCA) coupled with surgical stabilization of rib fractures (SSRF) has been shown to reduce post-operative pain scores but at what monetary cost. We hypothesize that in-hospital outcomes improve with the addition of INCA to SSRF and potential increased hospital charges are justified by patient benefits.

METHODS

Multi-institutional, retrospective review of patients undergoing SSRF with and without INCA over an 8-year period. Institutions involved were Level II or higher trauma centers. Basic demographics were obtained. Patients were included if SSRF was performed during the index hospitalization. Primary outcomes included total hospital length of stay (HLOS) and HLOS after SSRF, total hospital charges (HC), HC the day of surgery and HC after surgery. Secondary outcome included total narcotic consumption in morphine milliequivalents (MME) after SSRF. Mann-Whitney U test was used for analysis. Statistical significance p < 0.05.

RESULTS

136 patients analyzed; 92 underwent SSRF only and 44 underwent SSRF with INCA. Demographics were similar between groups. Number of ribs stabilized was comparable; 4.78 ± 1.64 SSRF only and 4.73 ± 1.66 SSRF with INCA (p = 0.463). Median ISS [16 (IQR 11.5-16) SSRF only and 14 (IQR 9-18.75) SSRF with INCA (p = 0.463)] was not statistically different. The INCA group showed a decrease in the median total HLOS, 9 versus 10 days (U = 1517.5, p = 0.026) and HLOS after SSRF, 4 versus 6 days (U = 1217.5, p < 0.001). HC the day of surgery were higher for the INCA group, $93,932 versus $71,143 (U = 1106, p < 0.001). However, total HC were similar between groups and total HC after SSRF was significantly less for the INCA group, $10,556 versus $20,269 (U = 1327, p = 0.001). Total median narcotic use after SSRF was significantly less for the INCA group, 88.6 vs 113.7 MME (U = 1544.5, p = 0.026).

CONCLUSION

SSRF with INCA is safe and does not increase overall HC with the added benefit of decreased HLOS post-operatively and decreased narcotic consumption.

A Postoperative Displacement Measurement Method for Femoral Neck Fracture Internal Fixation Implants Based on Femoral Segmentation and Multi-Resolution Frame Registration

Femoral neck fractures have a high incidence in the geriatric population and are associated with high mortality and disability rates. With the minimally invasive nature, internal fixation is widely used as a treatment option to stabilize femoral neck fractures. The fixation effectiveness and stability of the implant is an essential guide for the surgeon. However, there is no long-term reliable evaluation method to quantify the implant’s fixation effect without affecting the patient’s behavior and synthesizing long-term treatment data. For the femur’s symmetrical structure, this study used 3D convolutional networks for biomedical image segmentation (3D-UNet) to segment the injured femur as a mask, aligned computerized tomography (CT) scans of the patient at different times after surgery and quantified the displacement in the specified direction using the generated 3D point cloud. In the experimental part, we used 10 groups containing two CT images scanned at the one-year interval after surgery. By comparing manual segmentation of femur and segmentation of femur as a mask using neural network, the mask obtained by segmentation using the 3D-UNet network with symmetric structure fully meets the requirements of image registration. The data obtained from the 3D point cloud calculation is within the error tolerance, and the calculated displacement of the implant can be visualized in 3D space.

Clinical significance of rib fractures' anatomical patterns

OBJECTIVES

Rib fractures are common and carry significant morbidity. Chest CT provides an accurate mapping of the fractures. The aim of this study is to propose an anatomical classification of rib fractures, and assess their relation to complication development.

METHOD

The records of all blunt trauma patients between January 1st 2014 and December 31st 2017 at a university hospital were retrospectively reviewed. Wounded who were hospitalized with rib fractures (two and more) as the primary injury were included in the study. Based on the chest CT scans, the cohort was divided into five groups: upper ribs (1-4) fractures, anterior, lateral and posterior middle ribs (4-7) fractures, and lower ribs (9-12) fractures. Data regarding demographics, complications (pneumothorax, hemothorax, chest drains, pulmonary contusion atelectasis, pneumonia, respiratory failure and death), intensive care admission and hospital stay were collected.

RESULTS

A total of 102 wounded were included in the study, with a mean age of 46.3 years. The mean number of fractured ribs per person was 3.82±1.68, and 46 wounded had displaced fractures. Rib fracture distribution was: upper ribs - 13.7%, anterior middle ribs - 28.5%, lateral middle ribs fractures - 27.5%, posterior middle ribs - 14.7%, lower ribs fractures - 15.7%. Wounded sustaining lateral middle ribs fractures had the highest complications rates in relation to any other fracture location group, with 25% respiratory failure rate.

CONCLUSIONS

Lateral middle ribs fractures are associated with a higher complication rate and may require closer oabservation.