Risk factors for infection and amputation following open, combat-related calcaneal fractures

The Major Extremity Trauma Research Consortium: Development and Impact of an Orthopaedic Trauma Research Program

The Major Extremity Trauma Research Consortium (METRC) is a unique and ongoing military-civilian collaboration that resulted in the largest orthopaedic trauma research enterprise to date. The Consortium was established in September 2009 with funding from the Department of Defense. It employs a centralized data coordinating center and has grown into a network of nearly 400 investigators at 70 clinical centers. METRC conducts large multicenter clinical research studies selected and designed to improve outcomes among severely injured military and civilian patients with extremity trauma. Over the past decade, the consortium has implemented 35 such studies distributed among 19 principal investigators, enrolled more than 23,000 patients, published 61 articles, and received more than $150 million in funding from the Department of Defense, Patient Centered Outcomes Research Institute, and National Institutes of Health. This unique multidisciplinary research platform is a powerful community capable of addressing the challenging issues related to the evaluation, treatment, and recovery after severe extremity trauma. This body of work received the 2023 Elizabeth Winston Lanier Kappa Delta Award. An overview of the METRC development, organization, and research focus areas is presented.

A risk prediction model for postoperative recovery of closed calcaneal fracture: a retrospective study

OBJECTIVE

To explore the risk factors for postoperative recovery of closed calcaneal fracture and develop a prediction model.

METHODS

We retrospectively enrolled patients with closed calcaneal fracture from January 1, 2017 to December 31, 2020. Patients treated from 2017 to 2019 were selected as a training cohort and those in 2020 as a validation cohort. The outcome variable was the postoperative recovery evaluated by the Creighton-Nebraska calcaneal fracture scoring system. Multivariate logistic regression analysis was used to screen the risk factors of postoperative recovery. A risk prediction model was constructed in the training cohort and the corresponding nomogram was drawn. The model was validated internally using bootstrapping and externally by calculating the performance in the validation cohort.

RESULTS

A total of 659 patients with closed calcaneal fracture met the inclusion and exclusion criteria, which were divided into the training cohort (n = 509) and the validation cohort (n = 150). 540 cases (81.9%) patients recovered well after calcaneal fracture surgery. According to multivariate logistic regression analysis, female (OR = 2.525, 95% CI 1.283-4.969), > 60 years (OR = 6.644, 95% CI 1.243-35.522), surgery within 8-14 days after fracture (OR = 2.172, 95% CI 1.259-3.745), postoperative infection (OR = 4.613, 95% CI 1.382-15.393), and weight-bearing time longer than 3 months after surgery (4-6 months, OR = 2.885, 95% CI 1.696-4.907; 7-12 months, OR = 3.030, 95% CI 1.212-7.578; > 12 months, OR = 15.589, 95% CI 3.244-74.912) were independent risk factors for postoperative recovery of calcaneal fractures. The C-indices were 0.750(95% CI 0.692-0.808) in the training cohort and 0.688(95% CI 0.571-0.804) in the external validation cohort, and the C-index of internal validation was 0.715. The Hosmer-Lemeshow test showed good fitting of the model (all P > 0.05), which was consistent with the results of the calibration plots. Decision Curve Analysis indicated that the clinical effectiveness was the best when the threshold probability was between 0.10 and 0.45.

CONCLUSIONS

Patients with female, > 60 years, surgery within 8-14 days after fracture, postoperative infection, and weight-bearing time longer than 3 months after surgery are more likely to have poor postoperative recovery. The risk prediction of fracture patients through this model might be translated into clinical guidance and application. Trial registration This study was registered on the Chinese Clinical Trial Registry (Registration number: ChiCTR-EPR-15005878).

Treatment of a compound calcaneus fracture Sanders IV with an external circular fixator and calcaneal osteotomy

Compound Gustilo-type III intra-articular calcaneus fractures are challenging to treat. Anatomical reduction of the subtalar joint increases the chances of a better functional outcome and is traditionally achieved by an open reduction and plating. Conversely, ORIF is associated with a high risk of infection and even amputation. In our case study, we present the treatment of a Gustilo-type III intra-articular calcaneus fracture with a circular external fixator and a temporary antibiotic cement spacer for fracture reduction and stabilization. Active bio-glass was implanted to fill bone loss and to prevent infection. A closing-wedge calcaneal tuberosity osteotomy was used to facilitate wound closure. We paid special attention to reducing the posterior facet. The patient returned to work and full ambulation five months post-injury.

Screws-Only Primary Subtalar Arthrodesis for Calcaneus Fractures

BACKGROUND

The management of displaced intraarticular calcaneus fractures (DIACFs) is a difficult problem with disappointing results from open reduction internal fixation (ORIF). Alternatively, ORIF with primary subtalar arthrodesis (PSTA) has gained increasing popularity. The purpose of this study is to review patient-centered and radiographic outcomes of ORIF plus PSTA using only screws through a sinus tarsi approach.

METHODS

A retrospective study of patients who underwent ORIF+PSTA for DIACFs was conducted. The same surgical technique was used in all cases consisting of only screws; no plates were used. Delayed surgeries past 8 weeks were excluded. Demographic and radiographic data were collected including worker's compensation claims. Plain radiographs were used to characterize injuries and review outcomes.

RESULTS

Seventy-nine DIACFs underwent PSTA with a median follow-up of 200 days (n = 69 patients). Median time to weightbearing was 57.5 days postoperatively. Ten fractures were documented as Sanders II, 36 as Sanders III, and 32 as Sanders IV. Sixty-eight fractures (86.1%) achieved fusion on radiographs at a median of 126.5 (range, 54-518) days. Thirty-nine fractures (57.3%) demonstrated radiographic fusion in all 3 predefined locations. Nine of the 14 worker's compensation patients returned to work within the period of observation. There were 8 complications: 3 requiring a secondary operation. Eleven of 79 fractures treated did not go on to achieve radiographic union.

CONCLUSION

In this retrospective case series, we found that screws-only primary subtalar arthrodesis for the treatment of DIACFs through a sinus tarsi approach was associated with relatively high rates of return to work and radiographic fusion.

LEVEL OF EVIDENCE

Level IV, retrospective case series.

Factors associated with return to duty and need for subsequent procedures after calcaneus open reduction internal fixation in the military

INTRODUCTION

Calcaneus fractures can be devastating injuries, and operative treatment is fraught with complications. We are unaware of any studies evaluating all calcaneus fractures, both open and closed, treated operatively in the military. The purpose of this study is to evaluate all calcaneus fractures that required open reduction internal fixation to determine soldiers' ability to return to work and the need for additional surgeries.

METHODS

All active-duty patients undergoing open reduction internal fixation of calcaneus fractures from 2010-2016 were identified utilizing the Military Health System Management Analysis and Reporting Tool (M2). Armed Forces Health Longitudinal Technology Application (AHLTA) was utilized to determine comorbid medical conditions, subsequent procedures, surgical outcomes, and duty status within the military.

RESULTS

Three hundred seventy-five active-duty service members who met our inclusion/exclusion criteria were identified. One hundred fifty-one patients (55.1%) sustained their calcaneus fracture as a result of a blast injury. One hundred sixty (59.3%) patients required separation from the military as a result of their injury. Among patients who required a subsequent procedure, thirty-four patients (9.1%) required a subtalar arthrodesis, and thirty-two patients (8.5%) eventually required a below knee amputation. Blast as mechanism of injury was the single most predictive variable for patients requiring separation from the military (Odds Ratio 16.2, p< .001), requiring a subsequent procedure (Odds Ratio 8.4, p < .001), and for requiring a below knee amputation (Odds Ratio 47.3, p < .001).

CONCLUSION

Calcaneus fractures treated operatively in the military are often caused by blast injuries, and have a high rate of requiring subsequent procedures, amputation, and separation from the military.

Relationship between surgeon volume and the risk of deep surgical site infection (DSSI) following open reduction and internal fixation of displaced intra-articular calcaneal fracture

It is well established that the postoperative results were affected by the surgeon volume in a variety of elective and emergent orthopaedic surgeries; however, by far, no evidences have been available as for surgically treated displaced intra-articular calcaneal fractures (DIACFs). We aimed at investigating the relationship between surgeon volume and deep surgical site infection (DSSI) following open reduction and internal fixation (ORIF) of DIACFs. This was a further analysis of prospectively collected data from a validated database. Patients with DIACFs stabilised by ORIF between 2016 and 2019 were identified. Surgeon volume was defined as the number of surgically treated calcaneal fractures within one calendar year and was dichotomised based on the optimal cut-off value. The outcome measure was DSSI within 1 year postoperatively. Multivariate logistics regression analyses were performed to examine the relationship, adjusting for confounders. Among 883 patients, 19 (2.2%) were found to have a DSSI. The DSSI incidence was 6.5% in surgeons with a low volume (<6/year), 5.5 times as that in those with a high volume (≥6/year) (incidence rate, 1.2%; P < 0.001). The multivariate analyses showed a low volume <6/year was associated with a 5.8-fold increased risk of DSSI (95% confidence interval, 2.2-16.5, P < 0.001). This value slightly increased after multiple sensitivity analyses, with statistical significances still unchanged (OR range, 6.6-6.9; P ≤ 0.001). The inverse relationship indicates a need for at least six cases/year for a surgeon to substantially reduce the DSSIs following the ORIF of DIACFs.

Calcaneal Reconstruction With Femoral Head Allograft Vascularized by an Osteocutaneous Medial Femoral Condyle Flap: A Case Report

CASE

A 25-year-old man presented with a closed calcaneal fracture after a 6-storey fall, complicated by osteomyelitis from fixation attempts necessitating near-complete debridement of his calcaneal tuberosity. He underwent a successful single-stage calcaneal and soft-tissue reconstruction using a femoral head structural allograft vascularized with an osteocutaneous medial femoral condyle flap. At the 18-month follow-up, his limb is largely pain-free and functional, allowing ambulation and his combined allograft-vascularized bone reconstruction shows radiographic evidence of incorporation.

CONCLUSION

Calcaneal tuberosity reconstruction with a femoral head structural allograft and vascularized bone flap is a viable option for calcaneal tuberosity bone loss because of injury/infection.

Outcomes Following Severe Distal Tibial, Ankle, and/or Mid/Hindfoot Trauma: Comparison of Limb Salvage and Transtibial Amputation (OUTLET)

BACKGROUND

Selecting the best treatment for patients with severe terminal lower-limb injury remains a challenge. For some injuries, amputation may result in better outcomes than limb salvage. This study compared the outcomes of patients who underwent limb salvage with those that would have been achieved had they undergone amputation.

METHODS

This multicenter prospective observational study included patients 18 to 60 years of age in whom a Type-III pilon or IIIB or C ankle fracture, a Type-III talar or calcaneal fracture, or an open or closed blast/crush foot injury had been treated with limb salvage (n = 488) or amputation (n = 151) and followed for 18 months. The primary outcome was the Short Musculoskeletal Function Assessment (SMFA). Causal effect estimates of the improvement that amputation would have provided if it had been performed instead of limb salvage were calculated for the SMFA score, physical performance, pain, participation in vigorous activities, and return to work.

RESULTS

The patients who underwent limb salvage would have had small differences in most outcomes had they undergone amputation. The most notable difference was an improvement in the SMFA mobility score of 7 points (95% confidence interval [CI] = 2.0 to 10.7). Improvements were largest for pilon/ankle fractures and complex injury patterns.

CONCLUSIONS

Amputation should be considered a treatment option rather than a last resort for the most complex terminal lower-limb injuries.

LEVEL OF EVIDENCE

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

Effect of Severe Distal Tibia, Ankle, and Mid- to Hindfoot Trauma on Meeting Physical Activity Guidelines 18 Months After Injury

OBJECTIVE

To examine the effect of severe lower extremity trauma on meeting Physical Activity Guidelines for Americans (PAGA) 18 months after injury and perform an exploratory analysis to identify demographic, clinical, and psychosocial factors associated with meeting PAGA.

DESIGN

Secondary analysis of observational cohort study.

SETTING

A total of 34 United States trauma centers PARTICIPANTS: A total of 328 adults with severe distal tibia, ankle and mid- to hindfoot injuries treated with limb reconstruction (N=328).

INTERVENTIONS

None.

MAIN OUTCOME MEASURES

The Paffenbarger Physical Activity Questionnaire was used to assess physical activity levels 18 months after injury. Meeting PAGA was defined as combined moderate- and vigorous-intensity activity ≥150 minutes per week or vigorous-intensity activity ≥75 minutes per week.

RESULTS

Fewer patients engaged in moderate- or vigorous-intensity activity after injury compared with before injury (moderate: 44% vs 66%, P<.001; vigorous: 18% vs 29%; P<.001). Patients spent 404±565 minutes per week in combined moderate- to vigorous-intensity activity before injury compared with 224±453 minutes postinjury (difference: 180min per week; 95% confidence interval [CI], 103-256). The adjusted odds of meeting PAGA were lower for patients with depression (adjusted odds ratio [AOR], 0.45; 95% CI, 0.28-0.73), women (AOR, 0.59; 95% CI, 0.35-1.00), and Black or Hispanic patients (AOR, 0.49; 95% CI, 0.28-0.85). Patients meeting PAGA prior to injury were more likely to meet PAGA after injury (odds ratio, 2.0; 95% CI, 1.20-3.31).

CONCLUSIONS

Patients spend significantly less time in moderate- to vigorous-intensity physical activity after injury. Patients with depression are less likely to meet PAGA. Although the causal relationship is unclear, results highlight the importance of screening for depression.

Risk prediction model for deep surgical site infection (DSSI) following open reduction and internal fixation of displaced intra-articular calcaneal fracture

Deep surgical site infection (DSSI) is a serious complication affecting the surgical outcome of displaced intra‐articular calcaneal fracture, and a risk prediction model based on the identifiable risk factors will provide great clinical value in prevention and prompt interventions. This study retrospectively identified patients operated for calcaneal fracture between January 2014 and December 2019, with a follow‐up ≥1 year. The data were extracted from electronic medical records, with regard to demographics, comorbidities, injury, surgery and laboratory biomarkers at admission. Univariate and multivariate logistics regression analyses were used to identify the independent factors for DSSI, thereby the risk prediction model was developed. Among 900 patients included, 2.7% developed a DSSI. The multivariate analyses identified five factors independently associated with DSSI, including current smoking (OR, 2.8; 95% confidence interval [CI], 1.3‐6.4; P = .021), BMI ≥ 26.4 kg/m² (OR, 3.1; 95% CI, 1.6‐8.4; P = .003), ASA ≥II (OR, 1.3; 95% CI, 1.0‐5.1; P = .043), incision level of II (OR, 3.8; 95% CI, 1.3‐12.6; P = .018) and NLR ≥6.4 (OR, 3.2; 95% CI, 1.3‐7.5; P = .008). A score of 14 as the optimal cut‐off value was corresponding to sensitivity of 0.542 and specificity of 0.872 (area, 0.766; P < .001); ≥14 was associated with 8.1‐times increased risk of DSSI; a score of 7 was corresponding sensitivity of 100% and 10 corresponding to sensitivity of 0.875. The risk prediction model exhibited excellent performance in distinguishing the risk of DSSI and could be considered in practice for improvement of wound management, but its validity requires to be verified by better‐design studies.

American Academy of Orthopaedic Surgeons Clinical Practice Guideline Summary for Limb Salvage or Early Amputation

Clinical Practice Guideline for Limb Salvage or Early Amputation is based on a systematic review of current scientific and clinical research. The purpose of this clinical practice guideline is to address treatment for severe lower limb trauma below the distal femur by either amputation or limb salvage by providing evidence-based recommendations for key decisions that affect the management of patients with lower extremity trauma. This guideline contains 11 recommendations to evaluate the decision factors important for limb salvage versus early amputation. In addition, the work group highlighted the need for better research in the treatment and the shared decision making process of high-energy lower extremity trauma.

Management of Open Calcaneal Fractures with Medial Wounds by One-Stage Sequential Reduction and Frame Structure Fixation Using Percutaneous Kirschner Wires

Objective

To assess the clinical outcomes of open calcaneal fractures with medial wounds treated with one‐stage management, including early modern wound care, sequential reduction, and frame structure fixation using percutaneous Kirschner wires.

Methods

A total of 19 patients with open calcaneal fractures admitted to our hospital from May 2016 to March 2019 were selected in this study. Twelve type‐II and seven type‐IIIA medial open injuries were identified according to the classification of Gustilo and Anderson. Fractures were stratified by Sanders classification, including nine type‐II fractures, seven type‐III fractures, and three type‐IV fractures. All patients accepted one‐stage irrigation and debridement, sequential reduction of calcaneal fractures through the open medial wound, percutaneous Kirschner wire fixation, and primary closure of wounds covered with vacuum‐assisted closure (VAC) device. The Bohler angle, the Gissane angle, and the width of the calcaneus were compared before and after surgery. The functional results were evaluated according to the Paley and Hall score system, visual analogue scale (VAS), American Orthopaedic Foot and Ankle Society (AOFAS) ankle and hindfoot score, Maryland Foot Score, and related complications.

Results

The follow‐up duration for all patients ranged from 14 to 28 months (mean, 22.7 months). The angle of Bohler and Giasane was increased from (−7.6° ± 15.0°) and (96.6° ± 7.6°) before surgery to (23.7° ± 6.1°) and (124.1° ± 7.1°) postoperatively (P < 0.05), respectively. Three cases of superficial infection and two cases of wound dehiscence were observed in our study, which were then successfully treated with wound debridement, VAC replacement, appropriate use of antibiotics, and delayed closure. The last follow‐up revealed three cases of lateral wall expansion and six cases of mild‐to‐moderate subtalar arthritis based on the Paley and Hall scoring system. According to the AOFAS ankle and hindfoot score, one case showed excellent results, 14 cases exhibited good results, and four cases displayed fair results, with the mean of 80.7 ± 6.7 points (range, 70–90). The Maryland Foot Score revealed one case of excellent outcomes, nine cases of good outcomes, and nine cases of fair outcomes with an average of 76.8 ± 8.6 points (range, 62–90). The mean VAS for pain was 1.8 ± 1.5 (range, 0–5), and a total of 14 patients complained of mild‐to‐moderate pain when walking for a more extended period. Severe complications, such as deep infection, osteomyelitis, and soft tissue necrosis, were not observed during follow‐up.

Conclusions

Collectively, one‐stage management allowed the direct restoration of calcaneal morphology with a minimal invasion of soft tissues in most open calcaneal fractures with medial wounds, and the functional outcomes were comparable to previous data.

Using the Red Cross wound classification to predict treatment needs in children with conflict-related limb injuries: a retrospective database study

Background

The International Committee of the Red Cross (ICRC) implemented the Red Cross wound classification (RCWC) to quickly assess the severity of a wound in conflict settings. A subdivision into wound grades derived from the RCWC consists of grades 1, 2, and 3, and represents low, major, and massive energy transfer, respectively, to the injured tissue. The aim of this observational study is to assess whether the Red Cross wound grade of a pediatric patient’s wound correlates with patient outcomes.

Methods

All pediatric patients (age < 15 years) treated in an ICRC hospital between 1988 and 2014 for conflict-related penetrating extremity injuries were retroactively included. Correlations were assessed between wound grades and number of surgeries, blood transfusions, days hospitalized, and mortality. Stratification analyses were performed to evaluate potential effect modifiers.

Results

The study included 2463 pediatric patients. Pediatric patients with a higher wound grade received significantly more surgeries (grade 1 median 2; grade 3 median 3), more blood transfusions (grades 1 and 3 received 33.9 and 72.2 units per 100 patients, respectively), and were hospitalized longer (grade 1 median 15; grade 3 median 40 days). Mortality rates did not significantly differ. Stratification analyses did not reveal effect modifiers for the association between wound grades and patient outcomes.

Conclusion

The Red Cross wound grade of a pediatric patient’s extremity wound correlates independently with treatment needs. This simple wound grading system could support clinical decision-making and should be integrated into the clinical assessment of weapon-wounded pediatric patients in conflict settings.

Hindfoot blast injuries caused by improvised explosive devices: long-term functional assessment in French military personnel

PURPOSE

The chosen treatment and long-term evaluation of hindfoot blast injuries are not well-represented in the literature. The first objective of this retrospective study was to evaluate functional outcomes in French service personnel who had sustained such injuries caused by improvised explosive devices. The second objective was to compare the results for patients who had amputations with those who did not. The hypothesis was that amputee recovered better function.

METHODS

Long-term functional evaluations were carried out using the American Orthopaedic Foot and Ankle Society scale (AOFAS), the Foot and Ankle Ability Measure (FAAM), and the Short Form 12 health survey (SF-12).

RESULTS

Eight servicemen with ten hindfoot blast injuries were reviewed at a mean follow-up time of seven years. Primary management was always conservative although half of the patients required late amputation for chronic pain. The patients who underwent amputation reported significantly lower levels of pain than those who did not have an amputation, with higher FAAM and SF-12 scores.

CONCLUSION

In this series, long-term functional results appear better in the amputated group.

Intra-articular Transcalcaneal Fracture-Dislocation Associated With Ipsilateral Transtalar Fracture: A Report of a Rare Combination

The association of ipsilateral talar and calcaneal fractures is an uncommon combination and is typically the result of a high-energy trauma. It is often associated with comminution, marked fracture displacement, and soft-tissue compromise. Obtaining satisfactory clinical and radiographic results is very challenging. Residual deformities, multiple procedures, and limitations are usually the norm. Therefore, studies have suggested that primary arthrodesis may represent the best option of surgical treatment. In this study, we report a case of a 30-year-old male patient with a rare combination of a highly comminuted transcalcaneal fracture-dislocation associated with a talar neck fracture successfully treated with open reduction and internal fixation (ORIF) with an 18-month follow-up. This case demonstrates that even when there are associated fractures of the talus and calcaneus with severe bone loss, ORIF may provide satisfactory outcomes in the short-term postoperative period.Levels of Evidence: Level V: Case report.

Comparing open reduction and internal fixation versus closed reduction using dual-point distraction and percutaneous fixation for treating calcaneal fractures

Objectives

This study aims to compare the early clinical, functional and radiographic outcomes of a small cohort of patients with calcaneal fractures treated with closed reduction using a dual- point distraction system and the traditional lateral approach.

Patients and methods

We prospectively treated 40 patients with calcaneus fractures who presented to our emergency department between January 2017 and February 2018. In total, 35 patients (22 males, 13 females; median age 39.8 years; range, 19 to 57 years) were included in this study since five patients were not followed up. Fractures were classified according to the Sanders classification system using computer tomography images. Clinical outcomes including postoperative two-week visual analog scale (VAS) score, sickness absence period, operating time and complication rate were recorded.

Results

The mean follow-up period was 24 months. Closed reduction using dual-point distraction and percutaneous fixation (group 1) was performed in 17 patients, whereas the extended lateral approach (group 2) was used in 18 patients. There were no significant differences between both groups in age, follow- up outcomes and Sanders classification. Operating time was significantly shorter in group 1 than in group 2. At postoperative two weeks, VAS scores were significantly lower in group 1 than in group 2. The complication rate and sickness absence period were significantly lower in group 1 than in group 2.

Conclusion

Closed reduction using dual-point distraction can be preferred owing to many advantages including considerably decreased risk of wound complications, sickness absence period and length of hospital stay as well as superior postoperative rehabilitation with a low pain score.

Negative-Pressure Wound Therapy in Foot and Ankle Surgery

Negative Pressure Wound Therapy (NPWT) is frequently utilized to manage complex wounds, however its mechanisms of healing remain poorly understood. Changes in growth factor expression, micro- and macro-deformation, blood flow, exudate removal, and bacterial concentration within the wound bed are thought to play a role. NPWT is gaining widespread usage in foot and ankle surgery, including the management of traumatic wounds; diabetic and neuropathic ulcers; wounds left open after debridement for infection or dehiscence; high-risk, closed incisions; tissue grafts and free flaps. This article reviews the rationale for NPWT, its proposed mechanisms of action, and the evidence regarding its clinical applications within the field of foot and ankle surgery. Level of Evidence: Level V, expert opinion.

Principles of Orthoplastic Surgery for Lower Extremity Reconstruction: Why Is This Important?

BACKGROUND

 Regardless of the antecedent etiology, lower extremity salvage and reconstruction attempts to avoid amputation, restore limb function, and improve quality of life outcomes. This goal requires a treatment team well versed in neurovascular pathology, skeletal and soft tissue reconstruction, and physical rehabilitation.

METHODS

 A review was performed of historical milestones that lead to the development of orthoplastic extremity reconstruction, principles of current management and the evidence that supports an orthoplastic approach. Based on available evidence and expert opinion, the authors further sought to provide insight into the future of the field centered around the importance of a multidisciplinary management protocol.

RESULTS

 Historically, orthopaedic and plastic surgeons worked separately when faced with challenging reconstructive cases involving lower extremity skeletal and soft tissue reconstruction. With time, many embraced that their seemingly separate skill-sets and knowledge could be unified in a collaborative orthoplastic approach in order to offer patients the best possible chance for success. First coined by the senior author (LSL) in the early 1990s, the collaborative orthoplastic approach between orthopaedic and plastic surgeons in limb salvage for the past several decades has resulted in a unique field of reconstructive surgery. Benefits of the orthoplastic approach include decreased time to definitive skeletal stabilization/soft tissue coverage, length of hospital stay, post-operative complications, need for revision procedures and improved functional outcomes.

CONCLUSION

 The orthoplastic approach to lower extremity reconstruction is a collaborative model of orthopaedic and plastic surgeons working together to expedite and optimize care of patients in need of lower extremity reconstruction. The implementation of protocols, systems, and centers that foster this approach leads to improve outcomes for these patients. We encourage centers to embrace the orthoplastic approach when considering limb salvage, as the decision to amputate is irreversible.

High-Level Performance After the Return to Run Clinical Pathway in Patients Using the Intrepid Dynamic Exoskeletal Orthosis

BACKGROUND

Severe ankle and foot injuries in the US military can result in high-level functional limitation, lost duty days, and medical discharge.

OBJECTIVE

To assess the effectiveness of the Return to Run Clinical Pathway (RTR) in returning patients with lower extremity fractures who utilized the Intrepid Dynamic Exoskeletal Orthosis (IDEO) to high-level mobility.

METHODS

Thirty servicemembers with lower extremity fractures who utilized the IDEO unilaterally and completed the RTR at Naval Medical Center San Diego were included in this retrospective operational review. The Comprehensive High-level Activity Mobility Predictor (CHAMP) and all subtests were completed prior to and after completion of the RTR as part of routine clinical care. An analysis of covariance (ANCOVA) was used to compare CHAMP scores before and after the RTR.

RESULTS

Significant improvements were found in the T test (mean change, faster by 5.3 seconds; 95% confidence interval: 3.6, 7.1 seconds; P = .03) and total CHAMP score (mean change, 4.2 points; 95% confidence interval: 3.0, 5.3 points; P<.05). No significant changes were noted in the single-legged stance subtest, the Edgren sidestep test, or the Illinois agility test.

CONCLUSION

The RTR led to improvements in high-level, multidirectional mobility in IDEO users with a history of fractures. Applicability of the intervention used in this study requires further validation before widespread use.

LEVEL OF EVIDENCE

Therapy, level 4. J Orthop Sports Phys Ther 2019;49(7):529-535. Epub 13 Feb 2019. doi:10.2519/jospt.2019.8763.

Incidence and predictors of surgical site infection after ORIF in calcaneus fractures, a retrospective cohort study

BACKGROUND

Occurrence of calcaneus fractures is on the up trend. Owing to its unique anatomical morphology and limited soft-tissue envelope, management of calcaneus fractures is a challenge to the orthopaedic surgeon, and surgical site infection (SSI) is one of the serious postoperative complications. In order to decrease the incidence of wound breakdown and improve clinical outcomes, it is necessary to understand which factors were associated with SSI. The aim of this study was to identify predictors of SSI and quantify the incidence of SSI in calcaneus fractures following open reduction and internal fixation (ORIF).

METHODS

This retrospective study was performed at a level 1 trauma center from January 2014 to June in 2017. Data of adult patients with calcaneus fractures treated by ORIF were extracted from the electronic medical records. A total of 681 patients were collected. We reviewed the patients' demographics, characteristics of fracture, treatment-related variables, and indexes of laboratory examination. Univariate and multivariate logistic analysis models were performed respectively to determine independent predictors of SSI.

RESULTS

Sixty-six patients developed SSI in this study. The overall incidence of SSI after ORIF of calcaneus fracture was 9.7%, with 2.9% for deep infection and 6.8% for superficial SSI. Independent predictors of SSI identified by multivariate analysis were open fracture (odds ratio = 9.48, 95% CI = 4.53-19.85, P = 0.00007), high-energy injury (odds ratio = 2.07, 95% CI = 1.16-3.70, P = 0.01437), ASA class 3 or higher (odds ratio = 3.50, 95% CI = 1.18-10.37, P = 0.02401), and intraoperative temperature < 36.0 °C (odds ratio = 1.69, 95% CI = 1.13-2.28, P = 0.04410).

CONCLUSION

The SSI incidence was high (9.7%) for calcaneus fractures following ORIF. External fixation plays an important role in the treatment of severely displaced and depressed intra-articular or open calcaneus fractures. Increased ASA class and intraoperative hypothermia were associated with wound breakdown, and elaborative evaluation of fracture and soft-tissue damage was vitally necessary in this at-risk population.

Infectious Complications After Deployment Trauma: Following Wounded US Military Personnel Into Veterans Affairs Care

Background

Infectious complications related to deployment trauma significantly contribute to the morbidity and mortality of wounded service members. The Trauma Infectious Disease Outcomes Study (TIDOS) collects data on US military personnel injured in Iraq and Afghanistan in an observational cohort study of infectious complications. Patients enrolled in TIDOS may also consent to follow-up through the Department of Veterans Affairs (VA). We present data from the first 337 TIDOS enrollees to receive VA healthcare.

Methods

Data were collected from the Department of Defense (DoD) Trauma Registry, TIDOS infectious disease module, DoD and VA electronic medical records, and telephone interview. Cox proportional hazard analysis was performed to identify predictors of post-discharge infections related to deployment trauma.

Results

Among the first 337 TIDOS enrollees who entered VA healthcare, 111 (33%) had 244 trauma-related infections during their initial trauma hospitalization (2.1 infections per 100 person-days). Following initial discharge, 127 (38%) enrollees had 239 trauma-related infections (170 during DoD follow-up and 69 during VA time). Skin and soft-tissue infections and osteomyelitis were predominant during and after the initial trauma hospitalization. In a multivariate model, a shorter time to development of a new infection following discharge was independently associated with injury severity score ≥10 and occurrence of ≥1 inpatient infection during initial trauma hospitalization.

Conclusions

Incident infections related to deployment trauma continue well after initial hospital discharge and into VA healthcare. Overall, 38% of enrolled patients developed a new trauma-related infection after their initial hospital discharge, with 29% occurring after the patient left military service.

Determination of Pathogens in Postoperative Wound Infection After Surgically Reduced Calcaneal Fractures and Implications for Prophylaxis and Treatment

High rates of postoperative wound infection (POWI) have been reported after surgery for calcaneal fractures. This is a retrospective cohort study to determine the causative pathogens of these infections and subsequent treatment strategies. In addition, microbacterial growth from superficial wound swabs and deep fluid or tissue cultures were compared. Patients with a unilateral surgically treated calcaneal fracture during a 15-year period were included. Patient, fracture, and surgical characteristics were collected from the electronic medical records. An infection was categorized as deep or superficial using the Centers for Disease Control and Prevention criteria. Secondary outcomes were wound edge necrosis and wound dehiscence. The collection of culture swabs, their results, and treatment strategies were documented. Of 357 patients, 92 (26%) developed a POWI; 55 (60%) deep and 37 (40%) superficial. The most frequent causative pathogens were Enterobacteriaceae and Staphylococcus aureus. Of the 55 patients with deep infection, 31 (56%) were treated with intravenous antibiotics and surgical debridement, 2 (4%) with intravenous antibiotics, and 22 (40%) with implant removal. In 33 of 92 patients (36%) with a POWI, both superficial and deep cultures were obtained, with a microorganism not cultured from the superficial swab 13 (39%) times. In conclusion, we found that one quarter of patients with operative calcaneal fracture treatment developed a POWI, mainly caused by Enterobacteriaceae or S. aureus. Physicians should not rely on the results of superficially obtained cultures for adequate treatment of deep infection. Because the spectrum of sensitivity profiles varies greatly between hospitals and countries, we recommend empiric antibiotic treatment of both gram-positive and gram-negative microorganisms on suspicion of deep infection.

Epidemiology of Trauma-Related Infections among a Combat Casualty Cohort after Initial Hospitalization: The Trauma Infectious Disease Outcomes Study

BACKGROUND

The Trauma Infectious Disease Outcomes Study (TIDOS) cohort follows military personnel with deployment-related injuries in order to evaluate short- and long-term infectious complications. High rates of infectious complications have been observed in more than 30% of injured patients during initial hospitalization. We present data on infectious complications related to combat trauma after the initial period of hospitalization.

PATIENTS AND METHODS

Data related to patient care for military personnel injured during combat operations between June 2009 and May 2012 were collected. Follow-up data were captured from interviews with enrolled participants and review of electronic medical records.

RESULTS

Among 1,006 patients enrolled in the TIDOS cohort with follow-up data, 357 (35%) were diagnosed with one or more infection during their initial hospitalization, of whom 160 (45%) developed a trauma-related infection during follow-up (4.2 infections per 10,000 person-days). Patients with three or more infections during the initial hospitalization had a significantly higher rate of infections during the follow-up period compared with those with only one inpatient infection (incidence rate: 6.6 versus 3.1 per 10,000 days; p < 0.0001). There were 657 enrollees who did not have an infection during initial hospitalization, of whom 158 (24%) developed one during follow-up (incidence rate: 1.6 per 10,000 days). Overall, 318 (32%) enrolled patients developed an infection after hospital discharge (562 unique infections) with skin and soft-tissue infections being predominant (66%) followed by osteomyelitis (16%). Sustaining an amputation or open fracture, having an inpatient infection, and use of anti-pseudomonal penicillin (≥7 d) were independently associated with risk of an extremity wound infection during follow-up, whereas shorter hospitalization (15-30 d) was associated with a reduced risk.

CONCLUSIONS

Combat-injured patients have a high burden of infectious complications that continue long after the initial period of hospitalization with soft-tissue and osteomyelitis being predominant. Further research on the long-term impact and outcomes of combat-associated infection is needed.

Outcomes following limb salvage after combat hindfoot injury are inferior to delayed amputation at five years

Objectives

The surgical challenge with severe hindfoot injuries is one of technical feasibility, and whether the limb can be salvaged. There is an additional question of whether these injuries should be managed with limb salvage, or whether patients would achieve a greater quality of life with a transtibial amputation. This study aims to measure functional outcomes in military patients sustaining hindfoot fractures, and identify injury features associated with poor function.

Methods

Follow-up was attempted in all United Kingdom military casualties sustaining hindfoot fractures. All respondents underwent short-form (SF)-12 scoring; those retaining their limb also completed the American Academy of Orthopaedic Surgeons Foot and Ankle (AAOS F&A) outcomes questionnaire. A multivariate regression analysis identified injury features associated with poor functional recovery.

Results

In 12 years of conflict, 114 patients sustained 134 fractures. Follow-up consisted of 90 fractures (90/134, 67%), at a median of five years (interquartile range (IQR) 52 to 80 months).

The median Short-Form 12 physical component score (PCS) of 62 individuals retaining their limb was 45 (IQR 36 to 53), significantly lower than the median of 51 (IQR 46 to 54) in patients who underwent delayed amputation after attempted reconstruction (p = 0.0351).

Regression analysis identified three variables associated with a poor F&A score: negative Bohler’s angle on initial radiograph; coexisting talus and calcaneus fracture; and tibial plafond fracture in addition to a hindfoot fracture. The presence of two out of three variables was associated with a significantly lower PCS compared with amputees (medians 29, IQR 27 to 43 vs 51, IQR 46 to 54; p < 0.0001).

Conclusions

At five years, patients with reconstructed hindfoot fractures have inferior outcomes to those who have delayed amputation. It is possible to identify injuries which will go on to have particularly poor outcomes.

Cite this article: P. M. Bennett, T. Stevenson, I. D. Sargeant, A. Mountain, J. G. Penn-Barwell. Outcomes following limb salvage after combat hindfoot injury are inferior to delayed amputation at five years. Bone Joint Res 2018;7:131–138. DOI: 10.1302/2046-3758.72.BJR-2017-0217.R2.

Calcaneal Fractures - Should We or Should We not Operate?

The best treatment for displaced, intraarticular fractures of the calcaneum remains controversial. Surgical treatment of these injuries is challenging and have a considerable learning curve. Studies comparing operative with nonoperative treatment including randomized trials and meta-analyses are fraught with a considerable number of confounders including highly variable fracture patterns, soft-tissue conditions, patient characteristics, surgeon experience, limited sensitivity of outcome measures, and rehabilitation protocols. It has become apparent that there is no single treatment that is suitable for all calcaneal fractures. Treatment should be tailored to the individual fracture pathoanatomy, accompanying soft-tissue damage, associated injuries, functional demand, and comorbidities of the patient. If operative treatment is chosen, reconstruction of the overall shape of the calcaneum and joint surfaces are of utmost importance to obtain a good functional result. Despite meticulous reconstruction, primary cartilage damage due to the impact at the time of injury may lead to posttraumatic subtalar arthritis. Even if subtalar fusion becomes necessary, patients benefit from primary anatomical reconstruction of the hindfoot geometry because in situ fusion is easier to perform and associated with better results than corrective fusion for hindfoot deformities in malunited calcaneal fractures. To minimize wound healing problems and stiffness due to scar formation after open reduction and internal fixation (ORIF) through extensile approaches several percutaneous and less invasive procedures through a direct approach over the sinus tarsi have successfully lowered the rates of infections and wound complications while ensuring exact anatomic reduction. There is evidence from multiple studies that malunited displaced calcaneal fractures result in painful arthritis and disabling, three-dimensional foot deformities for the affected patients. The poorest treatment results are reported after open surgical treatment that failed to achieve anatomic reconstruction of the calcaneum and its joints, thus combining the disadvantages of operative and nonoperative treatment. The crucial question, therefore, is not only whether to operate or not but also when and how to operate on calcaneal fractures if surgery is decided.

Risk factors of wound infection after open reduction and internal fixation of calcaneal fractures

The aim of this study was to investigate the risk factors of wound infection after open reduction and internal fixation of calcaneal fractures.In all, 299 patients with 318 calcaneal fractures who underwent open reduction and internal fixation by a single surgeon were grouped according to different outcomes. We gathered the data on each patient including sex, age, injury mechanism, body mass index (BMI), time to operation, fracture type, associated injuries, treatment course, tourniquet time, blood loss, bone graft (yes or no), diabetes (yes or no), smoking history, and complications. Univariate analysis and multivariable analysis were used to determine the association between risk factors and wound infection.Patients who met the entry criteria included 267 males and 32 females with a mean age of 38.6 years. Among them, 5.3% (n = 17) suffered wound infection, and all of the wounds healed after different treatments. According to the univariate analysis, the patients who developed wound infections were active smokers, more obese (higher BMI), had a longer time from injury to operation, and longer tourniquet time. Multivariate analysis indicated that a higher BMI, delayed operation, and active smoking were independent risk factors for wound infection after open reduction and internal fixation of calcaneal fractures.Patients with calcaneal fractures who were smokers and had a higher BMI had a high risk of wound infections. We suggested that surgeons wait to operate until swellings of the injured foot improved, and we also suggested the operation should be within 14 days after the injury.

Salvage of Combat Hindfoot Fractures in 2003-2014 UK Military

BACKGROUND

Hindfoot fractures pose a considerable challenge to military orthopaedic surgeons, as combat injuries are typically the result of energy transfers not seen in civilian practice. This study aimed to characterize the pattern of hindfoot injuries sustained by UK military casualties in recent conflicts, define the early amputation and infection rate, and identify factors associated with poor early outcomes.

METHODS

The UK Joint Theatre Trauma Registry was searched for British military casualties sustaining a hindfoot fracture from Iraq and Afghanistan between 2003 and 2014. Data on the injury pattern and management were obtained along with 18-month follow-up data. Statistical analysis was performed with the chi-square test and binomial logistic regression analysis. The threshold for significance was set at P < .05. One hundred fourteen patients sustained 134 hindfoot injuries. Eighteen-month follow-up was available for 92 patients (81%) and 114 hindfeet (85%).

RESULTS

The calcaneus was fractured in 116 cases (87%): 54 (47%) were managed conservatively, 32 (28%) underwent K-wire fixation, and 30 (26%) underwent internal fixation. Nineteen patients (17%) required transtibial amputation during this time. A deep infection requiring operative treatment occurred in 13 cases (11%) with Staphylococcus aureus, the most common infectious organism (46%). A deep infection was strongly associated with operative fracture management ( P = .0016). When controlling for multiple variables, the presence of a deep infection was significantly associated with a requirement for amputation at 18 months ( P = .023). There was no association between open fractures and a requirement for amputation at 18 months ( P = .640), nor was conservative management associated with a requirement for amputation ( P = .999). Thirty-six fractures (32%) required unplanned revision surgery within the first 18 months following salvage, of which 19 (53%) involved amputation.

CONCLUSION

A deep infection was the sole variable significantly associated with a requirement for amputation by 18 months. These results suggest that attempts at salvaging these injuries are at the limits of orthopaedic technical feasibility.

LEVEL OF EVIDENCE

Level III, comparative series.

The Military Orthopedic Trauma Registry: The potential of a specialty specific process improvement tool

BACKGROUND

The Military Orthopaedic Trauma Registry (MOTR) was designed to replicate the Department of Defense Trauma Registry's (DoDTR's) role as pillar for data-driven management of extremity war wounds. The MOTR continuously undergoes quality assurance checks to optimize the registry data for future quality improvement efforts. We conducted a quality assurance survey of MOTR entrants to determine if a simple MOTR data pull could provide robust orthopedic-specific information toward the question of causes for late amputation.

METHODS

Forty-five entrants into the DoDTR with late transtibial amputation were sequentially abstracted into MOTR by MOTR data abstractors. The MOTR record was then examined by an independent reviewer for three data fields pertaining to the events leading up to the late amputation: injury before limb amputation, complications before and after amputation, and complication or other factor directly contributing to the decision for amputation.

RESULTS

Thirty-nine subjects had at least one fracture of the tibial diaphysis, tibial pilon, calcaneus, or multiple foot fractures. Twenty-nine fractures were described as open injuries for which 27 included a Gustilo and Anderson classification in the available data fields. Complications could be identified along the treatment course for 43 of the 45 entrants specific to the amputated limb. A directly contributing factor to late amputation was identified in 36 (80%) of the subjects. Infection, either alone or associated with fracture nonunion, was a contributing factor in 46% of late amputations. Wound infection was the most common complication both before and after the amputation.

CONCLUSION

The MOTR, using a simple data extraction from a few registry fields, can provide a robust amount of information that can direct process and care improvement for severely injured limbs by providing the level of detail pertinent to an orthopedic surgeon.

LEVEL OF EVIDENCE

Prognostic/epidemiological study, level IV.

Complex Foot Injury: Early and Definite Management

Complex foot injuries occur infrequently, but are life-changing events. They often present with other injuries as the result of a high-energy trauma. After initial stabilization, early assessment should be regarding salvagability. All treatment strategies are intensive. The initial treatment includes prevention of progression ischemia/necrosis, prevention of infection, and considering salvage or amputation. Definitive treatment for salvage includes anatomic reconstruction with stable internal fixation and early soft tissue coverage followed by aggressive rehabilitation. Prognosis after complex injuries is hard to predict. The various stages of the treatment are reviewed and recommendations are made.

Amputation: Not a failure for severe lower extremity combat injury

INTRODUCTION

The use of improvised explosive devices is a frequent method of insurgents to inflict harm on deployed military personnel. Consequently, lower extremity injuries make up the majority of combat related trauma. The wounding pattern of an explosion is not often encountered in a civilian population and can lead to substantial disability. It is therefore important to study the impact of these lower extremity injuries and their treatment (limb salvage versus amputation) on functional outcome and quality of life.

PATIENTS AND METHODS

All Dutch repatriated service members receiving treatment for wounds on the lower extremity sustained in the Afghan theater between august 2005 and August 2014, were invited to participate in this observational cohort study. We conducted a survey regarding their physical and mental health using the Short Form health survey 36, EuroQoL 6 dimensions and Lower Extremity Functional Scale questionnaires. Results were collated in a specifically designed electronic database combined with epidemiology and hospital statistics gathered from the archive of the Central Military Hospital. Statistical analyses were performed to identify differences between combat and non-combat related injuries and between limb salvage treatment and amputation.

RESULTS

In comparison with non-battle injury patients, battle casualties were significantly younger of age, sustained more severe injuries, needed more frequent operations and clinical rehabilitation. Their long-term outcome scores in areas concerning well-being, social and cognitive functioning, were significantly lower. Regarding treatment, amputees experienced higher physical well-being and less pain compared to those treated with limb salvage surgery.

CONCLUSION

Sustaining a combat injury to the lower extremity can lead to partial or permanent dysfunction. However, wounded service members, amputees included, are able to achieve high levels of activity and participation in society, proving a remarkable resilience. These long-term results demonstrate that amputation is not a failure for casualty and surgeon, and strengthen a life before limb (damage control surgery) mindset in the initial phase. For future research, we recommend the use of adequate coding and injury scoring systems to predict outcome and give insight in the attributes that are supportive for the resilience that is needed to cope with a serious battle injury.

Open Fracture Care During War: Opportunities for Research

Reported infection rates following severe open fractures of the lower extremity sustained in combat have varied widely, from 23% to 85%. The infection rates have been either similar to or higher than those reported in the civilian trauma literature. Deployed surgeons have increased the frequency of fasciotomy procedures for limbs with or at risk for clinical compartment syndrome. The long-term sequelae of compartment syndrome and fasciotomies are not clearly defined. The definition of the term late amputation has varied in the literature, and studies have not consistently included information on the causes of the amputations. Preclinical and clinical translational studies on the reduction of the rates of infection and other limb morbidities are needed to address the acute care of combat extremity wounds.

Changing paradigms in lower extremity reconstruction in war-related injuries

BACKGROUND

Ballistic high-energy trauma has substantially increased the severity of non-fatal extremity injuries incurred in modern warfare. Expedient medical care, refinement in surgical techniques, and soft tissue coverage have brought about a paradigm shift in the management of lower extremity wounds during the last decade with an increased emphasis on limb salvage.

METHODS

A literature-based study was conducted to analyze reconstructive modalities based on the location, depth, and severity of wounds, as well as mechanism of injury, concomitant vascular injuries and open fractures, choice of flap, timing of definitive reconstruction, and complications.

RESULTS

Extremity injuries account for over 60 % of injuries in the recent conflicts in Iraq and Afghanistan, with the majority secondary to explosive devices. The severity of these injuries is profound compared with civilian registries, and conventional injury scoring systems have failed to accurately predict outcomes in combat trauma. The mainstay of treatment is serial debridement, negative pressure therapy, fracture stabilization, and treatment of concomitant injuries by the forward medical teams with subsequent definitive reconstruction after transport to an advanced military treatment facility. Autologous reconstruction with free tissue transfer and pedicled flaps remains the primary modality for soft tissue coverage in limb salvage. Adjunct innovative modalities, such as external tissue expansion, dermal substitutes, and regenerative matrices, have also been successfully utilized for limb salvage.

CONCLUSION

Lower extremity injuries account for the vast majority of injuries in modern warzones. Explosive devices represent the most common mechanism of injury, with blast impact leading to extensive soft tissue injuries necessitating complex reconstructive strategies. Serial debridement, negative pressure therapy, and autologous reconstruction with free tissue transfer and pedicled flaps remain the mainstay of treatment in recent conflicts.

Effectiveness of MIS technique as a treatment modality for open intra-articular calcaneal fractures: A prospective evaluation with matched closed fractures treated by conventional technique

Twenty-five displaced intra-articular calcaneal fractures in 21 patients, aged 15-55 years were included in this study. Sanders' type I fractures, severe crushing or partial amputation, were excluded from the study. Patients were divided into group 1 (open fractures treated by MIS), and group 2 (closed fractures treated by ORIF). Group 1 had 16 and group 2 had 9 cases. Seven of 25 fractures (28%) developed wound related issues postoperatively. One patient (11.1%) in group 2 had wound margin necrosis, while 6 patients (37.5%) in group 1 developed pin tract and/or wound infection. At 1-year follow-up, the mean MFS for group 1 was 79 and mean MFS for group 2 was 84.4 (66.67% were good). The AOFAS score for group 1 was 77.37 and for group 2 was 86.1. The Bohlers' angle was restored in 81.16% cases in group 1 and 88.8% in group 2, while Gissane angle was restored in 68.75% of group 1 cases and 77.79% of group 2 cases. This study shows that acceptable fracture reduction can be obtained and maintained by MIS technique and it can be used as the primary definitive treatment option in open calcaneal fractures.

Contemporary demographics and complications of patients treated for open ankle fractures

Open ankle fractures are rare injuries with a high likelihood of wound complications and subsequent infections. There is limited information about the complications and outcomes of these injuries in different age groups. The aim of this study was to assess the contemporary demographics and complications related to this injury. We performed a chart review of all the 3030 patients treated for ankle fractures at a Level 1 trauma centre from 2006 to 2011. 137 (4.5%) patients had an open ankle fracture. The demographic data, injury mechanism, comorbidities, and fracture type were collected. Treatment, complications, length of stay and number of outpatient visits were also recorded. The mean age of the patients was 60 years and 56% were women. Most fractures were Weber type B with a medial sided wound (93%). Only 20% of the fractures were the result of high-energy trauma, and 31% were Gustilo grade III injuries. Immediate internal fixation was performed in 82% of patients, and the wound was primarily closed in most cases (80%). The incidence of postoperative wound necrosis and deep infection was 18% and 17%, respectively. There were more deep infections if pulsatile lavage was used during the wound debridement (p=0.029). About 14 (10%) patients required a flap reconstruction to cover the soft-tissue defect. Every other patient (54%) had a complication, and 21 patients (15%) suffered a long-term disability related to the injury. The number complications did not differ for nighttime and daytime operations (p=0.083). High-energy injuries were more common in younger patients (p<0.001) and these patients also had more lateral sided open wounds than older patients (p=0.002). Interestingly, younger patients also had significantly more complications (p=0.024), suffered more often from chronic pain (p=0.003), and required more flap reconstructions (p=0.026), reoperations (p=0.026), and outpatient clinic visits (p=0.006). Open ankle fractures have a high complication rate and often require multiple surgical procedures. In young patients these injuries are more likely to be the consequence of high-energy trauma leading to more complications and subsequently increased healthcare resource utilisation.

A model to predict limb salvage in severe combat-related open calcaneus fractures

BACKGROUND

Open calcaneus fractures can be limb threatening and almost universally result in some measure of long-term disability. A major goal of initial management in patients with these injuries is setting appropriate expectations and discussing the likelihood of limb salvage, yet there are few tools that assist in predicting the outcome of this difficult fracture pattern.

QUESTIONS/PURPOSES

We developed two decision support tools, an artificial neural network and a logistic regression model, based on presenting data from severe combat-related open calcaneus fractures. We then determined which model more accurately estimated the likelihood of amputation and which was better suited for clinical use.

METHODS

Injury-specific data were collected from wounded active-duty service members who sustained combat-related open calcaneus fractures between 2003 and 2012. One-hundred fifty-five open calcaneus fractures met inclusion criteria. Median followup was 3.5 years (interquartile range: 1.5, 5.1 years), and amputation rate was 44%. We developed an artificial neural network designed to estimate the likelihood of amputation, using information available on presentation. For comparison, a conventional logistic regression model was developed with variables identified on univariate analysis. We determined which model more accurately estimated the likelihood of amputation using receiver operating characteristic analysis. Decision curve analysis was then performed to determine each model's clinical utility.

RESULTS

An artificial neural network that contained eight presenting features resulted in smaller error. The eight features that contributed to the most predictive model were American Society of Anesthesiologist grade, plantar sensation, fracture treatment before arrival, Gustilo-Anderson fracture type, Sanders fracture classification, vascular injury, male sex, and dismounted blast mechanism. The artificial neural network was 30% more accurate, with an area under the curve of 0.8 (compared to 0.65 for logistic regression). Decision curve analysis indicated the artificial neural network resulted in higher benefit across the broadest range of threshold probabilities compared to the logistic regression model and is perhaps better suited for clinical use.

CONCLUSIONS

This report demonstrates an artificial neural network was capable of accurately estimating the likelihood of amputation. Furthermore, decision curve analysis suggested the artificial neural network is better suited for clinical use than logistic regression. Once properly validated, this may provide a tool for surgeons and patients faced with combat-related open calcaneus fractures in which decisions between limb salvage and amputation remain difficult.

Treatment of Calcaneal Fracture With Severe Soft Tissue Injury and Osteomyelitis: A Case Report

Advancements in surgical technique have resulted in the ability to reconstruct lower extremity injuries that would have previously been treated by amputation. Currently, a paucity of data is available specifically addressing limb amputation versus reconstruction for calcaneal fractures with severe soft tissue compromise. Reconstruction leaves the patient with their native limb; however, multiple surgeries, infections, chronic pain, and a poor functional outcome are very real possibilities. We present the case of a complex calcaneal fracture complicated by soft tissue injury and osteomyelitis that highlights the importance of shared decision-making between patient and surgeon when considering reconstruction versus amputation. This case exemplifies the need for open communication concerning the risks and benefits of treatment modalities while simultaneously considering the patient's expectations and desired outcomes.

Staged subtalar fusion for severe calcaneus fractures with bone loss

Background:

With high energy fractures to the calcaneus there is the potential for significant bone loss. The loss of bone can make it difficult to fully regain calcaneal alignment. In addition these fractures are often associated with significant soft tissue injury. These two factors make it difficult to address this injury in a single stage, and can have significant complications. To address these issues our initial goal in treatment has been restoration of calcaneal alignment and stabilization of the surrounding soft tissue, followed by delayed/staged subtalar arthrodesis.

Methods:

Patients with calcaneus fractures treated by a single surgeon from 2002 to 2012 were reviewed. Injuries which were found to have medial extrusion of the posterior facet and bone loss, and subsequently underwent a staged protocol involving early provisional fixation and late subtalar fusion were included.

Results:

We treated 6 calcaneus fractures with bone loss. All patients were treated with staged subtalar fusion after initial irrigation and debridement and provisional fixation. No soft-tissue complications were noted after the fusion procedure in any of the six cases. Fusion occurred in all six patients at an average of 20.6 weeks (range, 13-23 weeks). All patients were able to ambulate and wear a regular shoe by one year following the initial injury.

Conclusion:

It is important in the high energy calcaneus fracture to assess for both soft tissue integrity and bone loss. A thorough debridement of both the soft tissues and any devitalized bone should be performed as well as provisional fixation which attempts to restore near normal calcaneal anatomy. Definitive fusion should not be performed until the soft tissues have fully recovered.