Surgical complications after fixation of minimally displaced lateral compression type 1 pelvic ring injuries.

PURPOSE: To review surgical complications after fixation of stress-positive minimally displaced (< 1 cm) lateral compression type 1 (LC1) pelvic ring injuries. METHODS: A retrospective study at a level one trauma center identified patients who received surgical fixation of isolated LC1 pelvic ring injuries. Surgical complications and additional procedures were reviewed. RESULTS: Sixty patients were included. The median age was 61 years (Interquartile range 40-70), 65% (n = 39) were women, and 57% (n = 34) had high-energy mechanisms. Anterior-posterior, posterior-only, and anterior-only fixation constructs were used in 77% (n = 46), 15% (n = 9), and 8% (n = 5) of patients. Anterior fixation was performed with rami screw fixation in 82% (49/60), external fixation in 2% (1/60), and open reduction and plate fixation in 2% (1/60). There were 15 surgical complications in 23% (14/60), and 12 additional procedures in 17% (10/60). Complications included loss of reduction ≥ 1 cm (8%), symptomatic hematomas (8%), symptomatic backout of unicortical retrograde rami screws (5%), deep infection of the pelvic space after a retrograde rami screw (1.6%), and iatrogenic L5 nerve injury (1.6%). All losses of reduction involved geriatric females with distal rami fractures sustained in ground-level falls. Loss of reduction was found to be more likely in patients with low energy mechanisms (proportional difference (PD) 62%, 95% confidence interval (CI) 18% to 76%; p = 0.01) and 2 versus 1 posterior pelvic screws (PD 36%; CI 0.4% to 75%; p = 0.03). CONCLUSIONS: Surgical complications and additional procedures routinely occurred after fixation of LC1 injuries. Patients should be appropriately counseled on the risks of surgical fixation of these controversial injuries. LEVEL OF EVIDENCE: Diagnostic, Level III.

Variables Associated With Loss of Fixation of Retrograde Rami Screws in Minimally Displaced Lateral Compression Type 1 Pelvic Ring Injuries.

OBJECTIVES: To evaluate variables associated with loss of fixation of retrograde rami screws in the treatment of stress-positive minimally displaced lateral compression type 1 (LC1) injuries. DESIGN: Retrospective comparative study. SETTING: Level 1 trauma center. PATIENT SELECTION CRITERIA: Stress-positive minimally displaced (<1 cm) LC1 pelvic ring injuries treated with retrograde rami screws. OUTCOME MEASURES AND COMPARISONS: Loss of fixation, defined as >5 mm of pelvic fracture displacement based on the radiographic tear-drop distance or >5 mm of implant displacement on follow-up radiographs; revision surgery for loss of fixation. RESULTS: Thirty-eight patients with 40 retrograde rami screws were analyzed. Median patient age was 64 years (interquartile range 42.5-73.3 years), 71.1% (n = 27/38) were female, and 52.6% (n = 20/38) of injuries were secondary to low-energy mechanisms. Loss of fixation occurred in 17.5% (n = 7/40) of screws with 10% (n = 4/40) requiring revision surgery. On univariate analysis, patients who had a loss of fixation were more likely to have greater dynamic displacement on stress radiographs (22.0 vs. 15.2 mm; median difference 5.6 mm, confidence interval [CI] -19.2 to 10.3; P = 0.04), unicortical rami screws (71.4% vs. 9.1%; proportional difference 62.3%, CI 8.8%-22.6%; P = 0.001), and partially threaded rami screws (71.4% vs. 21.2%; proportional difference 50.2%, CI 10.0%-77.6%; P = 0.01). The remaining variables had no observed association ( P ≥ 0.05) with loss of fixation, including age, sex, body mass index, energy of injury mechanism, tobacco use, American Society of Anesthesiologist score, sacral fracture type, distal rami fractures, rami comminution, number of sacral screws, fully threaded sacral screws, transsacral screws, or rami screw diameter. On multivariate analysis, only unicortical rami screws ( P = 0.01) remained associated with loss of fixation. CONCLUSIONS: Retrograde rami screws had a high rate of loss of fixation in minimally displaced LC1 pelvic ring injuries, and this was associated with unicortical screws. These screws should be avoided when possible. LEVEL OF EVIDENCE: Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.

Postoperative Computed Tomography Scans of Acetabular Fractures Routinely Identify Indications for Revision Surgery.

OBJECTIVES: To investigate the utility of postoperative computed tomography (CT) scans in identifying indications for revision surgery after surgical fixation of acetabular fractures. DESIGN: Retrospective cohort study. SETTING: Urban level 1 trauma center. PATIENT SELECTION CRITERIA: Patients with surgically treated acetabular fractures with surgical fixation (open reduction and internal fixation or percutaneous fixation) with routine postoperative CT scans. OUTCOME MEASURES AND COMPARISONS: Primary outcome-revision surgery based on postoperative imaging, including intra-articular osteochondral fragments, implant complications, and malreductions. Secondary outcome-quality of reduction on radiographs versus CT scans. RESULTS: One hundred forty-eight patients were included. The revision surgery rate was 15.5% (23/148); indications included malpositioned implants (6.7%, n = 10), malreductions (5.4%, n = 8), and intra-articular loose bodies (3.4%, n = 5). Only 8.7% (2/23) of the indications for revision surgery were identified on postoperative radiographs, with the remainder being identified on CT scans. Revision surgeries were found to be associated with male gender (proportional difference: 19.6%, 95% confidence interval [CI]: 3.4%-29.4%; P = 0.04) and T-type fractures (PD 28.7%; CI, 9.0%-48.9%; P = 0.001). Revision surgery was not found to be associated with age, body mass index, posterior wall fractures, concurrent pelvic ring fractures, or surgical approach. On radiographs, 51.3% (n = 76/148) had anatomic reductions (<2 mm) compared with only 10.2% (n = 15/148) on CT scans. CONCLUSIONS: Indications for revision of acetabular fixation surgeries and poor reductions were frequently missed on plain radiography and identified on postoperative CT scans. This suggests that the use of advanced imaging such as intraoperative 3D imaging or postoperative CT scans may be beneficial. LEVEL OF EVIDENCE: Diagnostic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Disconnected: Electronic Patient-Reported Outcome Measure Collection in Orthopaedic Patients is Less Successful Than In-Person Collection at an Urban Safety Net Trauma Center.

OBJECTIVES: Electronic patient-reported outcome measure (E-PROM) collection is a technological advancement that has the potential to facilitate PROM collection in orthopaedic trauma. The purpose of this study was to compare E-PROM versus in-person PROM collection. DESIGN: This is a retrospective comparative study. SETTING: Urban Level I trauma center. PATIENTS/PARTICIPANTS: One hundred and fifty consecutive operative orthopaedic trauma patients. INTERVENTION: The Percent of Normal single assessment numerical evaluation and patient-reported outcomes measurement information system physical function were collected through automated e-mails from an online patient-engagement platform (PatientIQ, Chicago, IL) 2-week, 6-week, 3-month, and 6-month postoperatively. The Percent of Normal was also administered to patients in clinic at the same time intervals. MAIN OUTCOME MEASUREMENTS: Completion of PROMs; Loss to follow-up. RESULTS: The median clinical follow-up time was 4 months (interquartile range: 1.3-6 months), and 42.7% (64/150) were lost to follow-up. Loss to follow-up was associated with a more disadvantaged area deprivation index [observed difference, 7.0, 95% confidence interval, 1.0 to 13.0; P = 0.01] and noncommercial/no insurance (observed difference 34.8%, confidence interval, 20.9%-45.5%; P < 0.0001). In-person PROM collection was more successful than E-PROM collection at all intervals [2-week (51.3% vs 20.7), 6-week (46.7% vs 20.0%), 3-month (50.0% vs 18.7%), and 6-month (38.0% vs 18.7%), P < 0.0001]. Patients who completed 3-month E-PROMs had longer clinical follow-up (5.2 vs. 3.0 months, P = 0.004) and a trend of being less likely to be lost to follow-up (28.6% vs 45.9%, P = 0.13). CONCLUSION: E-PROMs were less successful than in-person PROM collection in trauma patients at an urban safety net trauma center. LEVEL OF EVIDENCE: Diagnostic Level III.

Posterolateral Rotatory Instability Develops Following the Modified Kocher Approach and Does Not Resolve Following Interval Repair.

BACKGROUND: The modified Kocher and extensor digitorum communis (EDC)-splitting intervals are commonly utilized to approach the lateral elbow. Iatrogenic injury to the lateral ulnar collateral ligament may result in posterolateral rotatory instability (PLRI). in the present cadaveric study, we (1) evaluated lateral elbow stability following the use of these approaches and (2) assessed the accuracy of static lateral elbow radiographs as a diagnostic tool for PLRI. METHODS: Ten matched-pair cadaveric upper-extremity specimens (n = 20) were randomly assigned to Kocher or EDC-splitting approaches. Specimens underwent evaluation pre-dissection, post-dissection, and following repair of the surgical interval. Clinical evaluation of lateral elbow stability was performed with the lateral pivot-shift maneuver. Radiographic radiocapitellar displacement was evaluated with the fully extended hanging arm test and on lateral elbow 30° flexion radiographs. Paired Wilcoxon signed-rank tests with Bonferroni correction were utilized to compare groups. RESULTS: All Kocher group specimens (10 of 10) developed PLRI on the pivot-shift maneuver following dissection. No EDC-splitting group specimens (0 of 10) developed instability with pivot-shift testing. The fully extended hanging arm test showed no difference in radiocapitellar displacement between groups (p > 0.008). Lateral elbow 30° flexion radiographs in the Kocher group showed an increased radiocapitellar displacement difference (mean, 8.46 mm) following dissection compared with the pre-dissection baseline (p < 0.008). Following repair of the Kocher interval, the radiocapitellar displacement (mean, 6.43 mm) remained greater than pre-dissection (mean, 2.26 mm; p < 0.008). In the EDC-splitting group, no differences were detected in radiocapitellar displacement on lateral elbow radiographs with either the fully extended hanging arm or lateral elbow 30° flexion positions. CONCLUSIONS: The Kocher approach produced PLRI that did not return to baseline conditions following repair of the surgical interval. The EDC-splitting approach did not cause elbow instability clinically or radiographically. The hanging arm test was not reliable for the detection of PLRI. CLINICAL RELEVANCE: The Kocher interval for lateral elbow exposure results in iatrogenic PLRI that is not detectable on the hanging arm test and that does not return to baseline stability following repair of the surgical interval.

Nonoperative management of minimally displaced lateral compression type 1 (LC1) injuries with comminuted rami fractures is associated with late displacement.

PURPOSE: Rami comminution has been found to be predictive of lateral compression type 1 (LC1) injury instability on examination under anesthesia (EUA) and lateral stress radiographs (LSR). The purpose of this study was to evaluate how rami comminution and subsequent operative vs. nonoperative management impact the late displacement of these injuries. METHODS: Retrospective review of a prospectively collected LC1 database was performed to identify all patients with minimally displaced LC1 injuries (< 1 cm) and follow-up radiographs over a four-year period (n = 125). Groups were separated based on the presence of rami comminution and subsequent management, including rami comminution/operative (n = 49), rami comminution/nonoperative (n = 54), and no comminution/nonoperative (control group, n = 22). The primary outcome was late fracture displacement, analyzed as both a continuous variable and as late displacement ≥ 5 mm. RESULTS: As a continuous variable, late fracture displacement was lower in the comminuted rami/operative group as compared to the comminuted rami/nonoperative group (PD: -3.0 mm, CI: -4.8 to -1.6 mm, p = 0.0002) and statistically non-different from control. Late displacement ≥ 5 mm was significantly more prevalent in the comminuted rami/nonoperative group than in the comminuted rami/operative and no comminution/nonoperative groups (control)(PD: -33.9%, CI: -49.0% to -16.1%, p = 0.0002 and PD: -30.0%, CI: -48.2% to -6.5%, p = 0.02, respectively). CONCLUSION: Late fracture displacement was greatest in the group with rami comminution/nonoperative management. Rami comminution, which has been previously associated with dynamic displacement on EUA and LSR, is also associated with a higher incidence of late displacement when managed nonoperatively. LEVEL OF EVIDENCE: Level III, prognostic retrospective cohort study.

Percutaneous pelvic fixation model: an affordable and realistic simulator for pelvic trauma training.

PURPOSE: To describe the construction and use of a percutaneous pelvic fixation model, evaluate its translational validity among fellowship-trained orthopedic trauma surgeons, and investigate the importance of specific criteria for effective competency-based assessment of pelvic fixation techniques. METHODS: Five orthopedic trauma surgeons were asked to place percutaneous wires on a pelvic fixation model, including anterior column (antegrade/retrograde), posterior column (antegrade/retrograde), supra-acetabular, transsacral, and iliosacral. Evaluation criteria included successful wire placement, redirections, cortical breaches, procedure duration, radiation exposure, and quality of fluoroscopic views. Following completion, participants were provided a survey to rate the model. RESULTS: There were no differences between approaches on successful screw placement, wire redirections, or fluoroscopic quality. Antegrade approaches to the anterior and posterior columns took longer (p = 0.008) and used more radiation (p = 0.02). There was also a trend toward more cortical breaches with the antegrade anterior column approach (p = 0.07). Median ratings among surgeons were 4 out of 5 for their overall impression and its accuracy in tactile response, positioning constraints, and fluoroscopic projections. Learning parameters considered most important to the progression of trainees (most to least important) were successful screw placement, corridor breaches, wire redirections, quality of fluoroscopic views, radiation exposure, and procedure duration. CONCLUSION: In being affordable, accessible, and realistic, this percutaneous pelvic fixation model represents an opportunity to advance orthopedic surgery education globally. Future research is needed to validate the findings of this pilot study and to expand upon how trainees should be evaluated within simulations and the operating room to optimize skill progression.

Disconnected: Electronic Patient-Reported Outcome Measure Collection In Orthopaedic Patients at an Urban Safety-Net Hospital.

INTRODUCTION: Collection of patient-reported outcome measures (PROMs) in orthopaedic patients at safety-net hospitals is challenging. The purpose of this study was to evaluate the success of electronic PROM (E-PROM) collection in this setting. METHODS: A retrospective review identified 207 consecutive orthopaedic patients undergoing 77 elective arthroplasty procedures and 130 trauma procedures. E-PROMs were collected through automated e-mails from an online patient engagement platform (PatientIQ) at 2 weeks, 6 weeks, and 3 months postoperatively. Patients with trauma received the percentage of normal Single Assessment Numerical Evaluation (SANE) and Patient-Reported Outcomes Measurement Information System-Physical Function (PROMIS-PF). Arthroplasty patients received the Hip/Knee SANE, Hip/Knee Disability and Osteoarthritis Outcome Score-Joint Replacement (HOOS Jr/KOOS Jr), PROMIS Global Physical Health (PROMIS-G-PH), and Veterans RAND 12-Item (VR-12) Health Survey. RESULTS: Compared with patients with trauma, arthroplasty patients were older (median difference 18.0 years; 95% confidence interval [CI] 12.0-22.0; P < 0.0001), more likely to be Hispanic/Black (proportional difference 16.9%; CI 2.8-30.3%; P = 0.02), more likely to have noncommercial or no insurance (proportional difference 34.0%; CI 23.2-43.0%; P < 0.001), and did not differ in Area Deprivation Index or E-PROM completion at each time point. E-PROMs were completed at 2 weeks, 6 weeks, and 3 months by 25.1% (52 of 207), 24.6% (51 of 207), and 21.7% (45 of 207) of all patients, respectively. Trauma and arthroplasty patients had a similar rate of partial E-PROM completion. Patients who completed 3-month E-PROMs were less likely to be Hispanic/Black (PD -16.4%; CI -31.0 to -0.2%; P < 0.04); less likely to have noncommercial/no insurance (PD -20.0%; CI -35.5 to -4.5%; P = 0.01); and did not differ in age, sex, Area Deprivation Index, or procedure type. DISCUSSION: The low collection rate of E-PROMs from orthopaedic patients at safety-net hospitals should be weighed against their costs. E-PROM collection may exacerbate disparities in PROM collection among certain patient populations. LEVEL OF EVIDENCE: Diagnostic Level III.

Early Outcomes of Operative Versus Nonoperative Management of Stress-Positive Minimally Displaced Lateral Compression Type 1 Pelvic Ring Injuries.

OBJECTIVES: To compare the early outcomes of patients with stress-positive minimally displaced lateral compression type 1 (LC1b) pelvic ring injuries managed with or without operative fixation. DESIGN: Retrospective comparison study. SETTING: Level 1 trauma center. PATIENTS/PARTICIPANTS: Forty-three patients with LC1b injuries. INTERVENTION: Operative versus nonoperative. MAIN OUTCOME MEASUREMENTS: Discharge to subacute rehabilitation (SAR); 2- and 6-week pain visual analog score, opioid use, assistive device use, percentage of normal single assessment numerical evaluation, SAR status; fracture displacement; and complications. RESULTS: The operative group did not differ in age, gender, body mass index, high-energy mechanism, dynamic displacement stress radiographs, complete sacral fractures, Denis sacral fracture classification, Nakatani rami fracture classification, follow-up length, or American Society of Anesthesiologists classification. The operative group was less likely to be using an assistive device at 6 weeks [observed difference (OD) -53.9%, 95% confidence interval (CI) -74.3% to -20.6%, OD/CI 1.00, P = 0.0005], less likely to remain in an SAR at 2 weeks (OD -27.5%, CI, -50.0% to -2.7%, OD/CI 0.58, P = 0.02), and had less fracture displacement at follow-up radiographs (OD -5.0 mm, CI, -9.2 to -1.0 mm, OD/CI 0.61, P = 0.02). There were no other differences in outcomes between treatment groups. Complications occurred in 29.6% (n = 8/27) of the operative group compared with 25.0% (n = 4/16) of the nonoperative group resulting in 7 and 1 additional procedures, respectively. CONCLUSIONS: Operative treatment was associated with early benefits over nonoperative management, including shorter time using assistive devices, less SAR use, and less fracture displacement at follow-up. LEVEL OF EVIDENCE: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Proximal Hamate Reconstruction of Proximal Pole Scaphoid Nonunion: A Case Series and Analysis of Clinical Outcomes.

BACKGROUND: Small proximal pole scaphoid nonunions present a clinical challenge influenced by fragment size, vascular compromise, deforming forces exerted through the scapholunate interosseous ligament (SLIL), and potential articular fragmentation. Osteochondral autograft options for proximal pole reconstruction include the medial femoral trochlea, costochondral rib, or proximal hamate. This study reports the clinical outcomes of patients treated with proximal hamate osteochondral autograft reconstruction. METHODS: A retrospective review identified patients treated with this surgery from 2 institutions with a minimum 6-month follow-up. Clinical outcomes included the Visual Analog Dcale pain score, 12-item Short-Form survey, abbreviated Disabilities of the Arm, Shoulder, and Hand (QuickDASH) score, wrist and forearm range of motion (ROM), radiographic assessment, and complications. We reviewed and compared these outcomes with those of the current published literature. RESULTS: Four patients (mean age: 24 years, 75% men) with a 12.8-month average follow-up (range: 6-20 months) were included. Radiographic union was identified in all cases by 12 weeks (range, 10-12). The average wrist ROM was 67.5% flexion/extension and 100% pronation/supination compared with the contralateral side at the final follow-up. The mean QuickDASH score was 17.6 (SD, 13). No complications were identified. CONCLUSIONS: Proximal pole scaphoid nonunion reconstruction using autologous proximal hamate osteochondral graft demonstrated encouraging clinical and radiographic outcomes. Proximal hamate harvest involves minimal donor site morbidity without a distant operative site, uses an osteochondral graft with similar morphology to the proximal scaphoid, requires no microsurgical technique, and permits reconstruction of the SLIL using the volar capitohamate ligament.

The Routine Use of Running Subcuticular Closures in Orthopaedic Trauma Patients Does Not Increase Wound Complications.

OBJECTIVE: To investigate whether the routine use of running subcuticular closures (RSC) in orthopaedic trauma patients increases the rate of wound complications and reoperations. DESIGN: Retrospective comparative study. SETTING: Urban Level 1 trauma center. PATIENTS/PARTICIPANTS: Two hundred sixty-six patients undergoing orthopaedic trauma procedures between June 2020 and March 2022. INTERVENTION: Adoption of an RSC protocol where any incision/wound that could be approximated with interrupted subcuticular 2-0 monofilament sutures was closed with a running subcuticular 3-0 monofilament suture. MAIN OUTCOME MEASUREMENTS: Wound complications and subsequent reoperations. RESULTS: With adoption of the RSC protocol, 91.0% of all orthopaedic trauma procedures were closed with RSC compared with 7.5% of the historical control group. There were no observed differences in the rate of wound complications (proportional difference (PD) 6.0%, confidence interval (CI) -2.3% to 14.1%; P = 0.15) or reoperations (PD 5.2%, CI -1.9% to 12.2%; P = 0.14) between the RSC and the control group. Wound complications were not associated with RSC on univariate analysis (PD 7.2%, CI -10.0% to 24.0%; P = 0.41). On multivariate analysis, an ASA>2 (odds ratio (OR) 2.4, CI 1.0 to 5.7; P = 0.03), lower extremity injuries (OR 4.9, CI 1.3 to 17.8; P = 0.01), and open reduction internal fixation procedures (OR 2.8, CI 1.1 to 7.2; P = 0.02) were found to be independently associated with wound complications. CONCLUSION: RSC for orthopaedic trauma procedures was not associated with increased wound complications when compared a historical cohort. LEVEL OF EVIDENCE: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Operative Management of Stress-Positive Minimally Displaced Lateral Compression Type 1 (LC1) Pelvic Ring Injuries: Analysis of Outcomes Before and After Implementation of a Departmental Stress Protocol.

OBJECTIVES: To compare the hospital course of patients with minimally displaced (<1 cm) lateral compression type 1 injuries treated before and after implementation of lateral stress radiographs (LSRs) to determine management. DESIGN: Retrospective comparative cohort. SETTING: Urban level 1 trauma center. PATIENTS/PARTICIPANTS: Isolated lateral compression type 1 injuries managed before (n = 33) and after implementation of LSRs (n = 40) to determine management. INTERVENTION: Patients in a prestress cohort managed nonoperatively versus patients in an LSR cohort managed operatively if stress positive (≥1 cm displacement on LSRs). MAIN OUTCOME MEASUREMENTS: Physical therapy clearance before discharge, discharge location, hospital length of stay, and inpatient opioid morphine milligram equivalents were measured. RESULTS: The prestress and LSR protocol groups were similar in demographic/injury characteristics (age, sex, mechanism, American Society of Anesthesiologists score, Nakatani classification, bilateral/unilateral injury, Denis zone, sacral fracture completeness, and sacral comminution). Forty-five percent of LSR protocol patients were stress-positive (n = 18) and managed operatively. The LSR protocol group was more likely to clear physical therapy by discharge (97.5% vs. 75.8%, PD: 21.7%, 95% CI: 5.1%-36.8%, P = 0.009), less likely to discharge to a rehabilitation facility (2.5% vs. 18.2%, PD: -15.7%, CI: -30.0% to -0.5%, P = 0.04), and had no difference in length of stay (MD: 0.0, CI:-1.0 to 1.0, P = 0.57) or inpatient opioid morphine milligram equivalents (MD: 9.0, CI: -60.0 to 101.0, P = 0.71). CONCLUSION: Implementation of an LSR protocol to determine management of minimally displaced stress-positive lateral compression type 1 injuries was associated with increased rates of operative management, physical therapy clearance by discharge, and a reduction in the number of patients discharging to rehabilitation facilities. LEVEL OF EVIDENCE: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Geriatric Patients Presenting With Isolated Pubic Rami Fractures and Inability to Mobilize May Have Occult Lateral Compression Pelvic Ring Injuries With Dynamic Instability.

OBJECTIVES: To determine the incidence of patients with isolated pubic rami fractures on computed tomography scans who have dynamic instability secondary to occult lateral compression pelvic ring injuries. DESIGN: Retrospective comparison study. SETTING: Urban level 1 trauma center. PATIENTS/PARTICIPANTS: This study included geriatric patients with isolated pubic rami fractures and inability to mobilize secondary to pain. INTERVENTION: Lateral stress radiographs of pelvis to evaluate for ≥1 cm dynamic instability. MAIN OUTCOME MEASUREMENTS: Physical therapy clearance, hospital length of stay, and discharge location. RESULTS: A total of 19 patients were identified over 12 months. Patients were predominantly geriatric (median age: 75 years, interquartile range: 67 to 90), woman (11/19), with unilateral (17/19) comminuted distal rami fractures (12/19) sustained in ground-level falls (12/19). Dynamic instability was identified in 42% of patients (8/19). Magnetic resonance imaging, obtained in 6 of these patients, demonstrated occult posterior ring fractures in all cases. Patients with dynamic instability were more likely to have comminuted distal rami fractures (Nakatani type 1b) and a longer hospital length of stay. There was also a trend for these patients to be unable to clear physical therapy by discharge (63% (5/8) versus 36% (4/11)). The 90-day mortality rate of the cohort was 16% (3/19). CONCLUSIONS: Patients presenting with seemingly isolated pubic rami fractures on radiographs and computed tomography scans who are unable to mobilize may have occult lateral compression injuries with dynamic instability. LEVEL OF EVIDENCE: Diagnostic Level III. See Instructions for Authors for a complete description of levels of evidence.

Are pre- and postoperative true translational and angular displacement predictive of nonunion after intramedullary nail fixation of tibial shaft fractures?

PURPOSE: To determine if there is an association between pre-/postoperative translational and angular displacement with nonunion after intramedullary nail (IMN) fixation of tibial shaft fractures. METHODS: Retrospective review of 120 patients with tibial shaft fractures undergoing IMN at an urban level-one trauma center was performed. Demographics, injury characteristics, and pre-/postoperative translational and angular fracture displacement in the coronal and sagittal planes were recorded. True fracture translational and angular displacement (TTD and TAD) were calculated by combining sagittal and coronal displacement utilizing the Pythagorean theorem. RESULTS: 10.8% of patients (n = 13) developed nonunion with remaining patients serving as the control. Groups were similar across age, sex, and BMI. Univariate analysis revealed no difference in pre-/postoperative TAD between nonunion and union groups and an increased preoperative TTD (median difference (MD): 6.2 mm, CI: 1.4-10.8 mm) and postoperative TTD (MD: 1.8 mm, CI: 0-3.7 mm) in the nonunion group. On multivariate analysis, however, only tobacco use and type 2 or 3 open fractures were associated with nonunion (OR: 5.1, CI: 1.2-22.8 and OR: 4.9, CI: 1.2-19.2, respectively). CONCLUSION: True translational and angular displacement of tibial shaft fractures before and after IMN fixation were not independently associated with nonunion. Tobacco use and type 2 or 3 open fracture are independent factors for nonunion.

Pelvic ring injuries after alpine ski and snowboard accidents.

PURPOSE: The purpose of this study was to analyze the patient/injury characteristics and associated hospital course of patients sustaining traumatic pelvic ring injuries after alpine ski and snowboard accidents at a level one trauma center in the Rocky Mountain region. METHODS: Patient/injury characteristics were obtained from patients presenting with pelvic ring injuries after alpine ski (n = 55) and snowboard (n = 9) accidents. Characteristics and outcomes analyzed included mechanism of injury, pelvic ring classification (Young-Burgess and Tile), hospital admission, physical therapy (PT) clearance, ambulation, length of stay, inpatient morphine milligram equivalents (MME), and discharges to rehabilitation facility. RESULTS: Snowboarders were more often younger, male, tobacco/substance users, and more likely to be injured by a fall from height than skiers. There were no differences in injury classification or hospital course outcomes between alpine sports. Most common injuries included lateral compression type 1 (LC1) injuries (37.5%), isolated pubic ramus fractures (31.3%), and isolated iliac wing fractures (15.6%). LC1 injuries were unstable in 50% of cases and associated with increased admissions (proportional difference: 47.5%, CI: 23.8-64.5%, p = 0.0002), longer time to PT clearance (median difference(MD): 1.0 day, CI: 0-2.0, p = 0.03), longer LOS (MD: 2.0, CI: 0-2.0, p = 0.02), and increased inpatient MMEs (MD: 197.9 MME, CI: 30.0-420.0, p = 0.02), as compared to other pelvic ring injuries. CONCLUSION: The majority of pelvic ring injuries from alpine ski and snowboard accidents were LC1 injuries, half of which were unstable, resulting in longer hospital stays, time to PT clearance/ambulation, and opioid use.

Pelvic ring injuries after road and mountain bike accidents.

PURPOSE: The purpose of this study was to compare patients with traumatic pelvic ring injuries sustained in road and mountain bicycling accidents to evaluate for differences in injury types and hospital courses. METHODS: A retrospective review of 60 patients presenting with pelvic ring injuries after road (n = 46) and mountain (n = 14) bicycling accidents was performed to compare patient/injury characteristics and hospital course. RESULTS: LC1 injuries were the most common pelvic ring injury (n = 31, 51.7%), 38.7% (n = 12) of which were considered unstable, followed by isolated iliac wing (n = 11, 18.3%), pubic rami (n = 6, 10.0%), and sacral fractures (n = 6, 10.0%). Hospital admission was required for 41 (68.3%) patients. The median hospital LOS was 4 days (IQR 2-9) and 12 (20%) patients received operative treatment. Patients in road versus mountain bicycling accidents were more likely to be older tobacco users and were similar in sex, body mass index, and injury severity score. Road bicycling resulted in more LC1 injuries (58.7% vs 28.6%, p = 0.04), while mountain bicycling resulted in more iliac wing fractures (42.9% vs. 10.9%, p = 0.01). Road cycling injuries required more days in the hospital to clear PT (median difference 2, CI 0-4, p = 0.04) and had longer hospital stays (median difference 2, CI 0-6, p = 0.02) but had no difference in the rate of admission, operative intervention, or discharge to rehabilitation facilities. CONCLUSION: The majority of pelvic ring injuries from road and mountain bicycling accidents were LC1 injuries that were frequently unstable and often required hospital admission and operative fixation.

The accuracy of hip fracture data entered into the national surgical quality improvement program (NSQIP) database.

PURPOSE: Internal validation studies of National Surgical Quality Improvement Program (NSQIP) registry data have reported potential inaccuracies. The purpose of this study was to determine the accuracy of hip fracture CPT codes and complications entered into NSQIP for a single participating center. METHODS: A retrospective study identified patients with a hip fracture CPT code from NSQIP data at a single institution over a two-year period. CPT codes included 27235 (percutaneous fixation of femoral neck fracture (Perc FNFX)), 27236 (open treatment of femoral neck fracture, internal fixation/prosthetic replacement (Open FNFX)), 27244 (open treatment of inter/peri/subtrochanteric femoral fracture with plate (Plate ITFX)), 27245 (treatment of inter/peri/subtrochanteric femoral fracture, with intramedullary implant (IMN ITFX)), and 27125 (hemiarthroplasty (HA)). The institutional medical record was reviewed to determine the accuracy of CPT code and 30-day complication data entered into the registry. RESULT: 12.8% (n = 20/156) of patients had an inaccurate CPT code. The proportion of inaccurate CPT codes varied significantly by procedure: Plate ITFX (76.9%), Open FNFX (13.8%), IMN ITFX (7.0%), and HA (0%) (p < 0.0001). A total of 82 complications were identified in 66 patients via the medical record. 43.9% (n = 36/82) of these complications were not documented in the NSQIP data. The proportion of missing complications varied significantly by type: renal (100%), UTI (53.8%), infection (50%), bleeding (30%), death (25%), respiratory (25%), cardiac (0%), stroke (0%), and VTE (0%) (p < 0.0001). CONCLUSION: Hip fracture CPT codes and 30-day complication data entered into the NSQIP registry were frequently inaccurate. Studies incorporating NSQIP data should acknowledge these potential limitations of the registry, and future research to validate NSQIP orthopedic data across procedures and institutions is necessary. LEVEL OF EVIDENCE: LEVEL III: Diagnostic study.

Open fixation of the posterior malleolus increases the morbidity of trimalleolar ankle fracture fixation.

PURPOSE: To assess the morbidity of open reduction internal fixation (ORIF) of posterior malleolus fractures (PMFs) in the setting of trimalleolar ankle fractures. METHODS: A retrospective review of 79 trimalleolar ankle fractures was performed to identify need for syndesmotic fixation, blood loss, operative/tourniquet time, complications, and reoperations. Patients with PMF ORIF (n = 38) were compared to those with no fixation (n = 41). A subanalysis of patients with small PMFs (< 25%) was performed. RESULTS: The PMF ORIF group required less syndesmosis fixation (proportional difference (PD) - 44.6%, 95% confidence interval (CI) - 61.8 to - 23.0%), had more blood loss (MD 20 ml, CI 0-40), longer operative times (MD 53.0 min, CI 35.9-70.1), longer tourniquet times (MD 26 min, CI 4-33), and had no difference in postoperative joint step-off or concentrically reduced joints. The PMF ORIF group had more postoperative complications (PD 26.9%, CI 6.3-44.8%) and a trend for more reoperations (PD 13.6%, CI -3.4 to 29.6%). Wound complications were more common in the PMF ORIF group (PD 26.5%, CI 6.9-43.6%), resulting in 5 (16.1%) irrigation and debridement procedures. On analysis of patients with small PMFs (n = 42), PMF ORIF (n = 15) resulted in longer operative/tourniquet times and had no observed difference in postoperative joint step-off, concentrically reduced joints, need for syndesmotic fixation, blood loss, or complications/reoperations. CONCLUSION: PMF ORIF in the setting of trimalleolar ankle fractures was associated with increased operative/tourniquet times, blood loss, wound complications, and did not eliminate the need for syndesmosis fixation.

Combined Anterior-Posterior versus Posterior-Only Fixation of Stress-Positive Minimally Displaced Lateral Compression Type 1 (LC1) Pelvic Ring Injuries.

OBJECTIVES: To compare hospital outcomes and late displacement between stress-positive minimally displaced lateral compression type 1 (LC1) pelvic ring injuries treated with combined anterior-posterior versus posterior-only fixation. DESIGN: Retrospective comparative cohort. SETTING: Urban level-one trauma center. PATIENTS/PARTICIPANTS: LC1 injuries managed operatively. INTERVENTION: Anterior-posterior versus posterior-only fixation. MAIN OUTCOME MEASUREMENTS: Physical therapy (PT) clearance, discharge location, hospital length of stay (LOS), inpatient morphine equivalent doses (MED), and fracture displacement at follow-up. RESULTS: Groups were similar in demographic and injury characteristics (age, high energy mechanism, ASA score, stress displacement, and rami/sacral fracture classifications). Anterior-posterior fixation resulted in longer operative times (median difference (MD): 27.0 minutes, 95% confidence interval (CI): 17.0 to 40.0, P < 0.0001) and had a trend of increased estimated blood loss (MD: 10 mL, CI: 0 to 30, P = 0.07). Patients with anterior-posterior fixation required less inpatient MEDs (MD: -180.0, CI: -341.2 to -15.0, P = 0.02), were more likely to clear PT by discharge (100% vs. 70%, proportional difference (PD): 30%, CI: 2.0%-57.2%, P = 0.02), were less likely to discharge to rehabilitation facilities (0% vs. 30%, PD: 30%, CI: 2.0%-57.2%, P = 0.02), and had a trend of less days to clear PT after surgery (MD: -1, CI: -2 to 0, P = 0.09) and decreased LOS (MD: -1, CI: -4 to 1, P = 0.17). Late fracture displacement did not differ between groups. CONCLUSION: Anterior-posterior fixation of LC1 injuries was associated with an improved early hospital course-specifically, reduced inpatient opioid use and an increased number of patients who could clear PT and discharge home. LEVEL OF EVIDENCE: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

The effect of pelvic ring rotation and tilt on the radiographic teardrop distance: an important consideration in the assessment of dynamic displacement on stress radiographs.

PURPOSE: The purpose of this study was to determine the effect of rotation and tilt on the radiographic teardrop distance (TD) on anteroposterior (AP) pelvis radiographs. METHODS: Radiographic examination of a pelvis models was conducted utilizing increasing degrees of beam rotation and tilt on portable C-arm fluoroscopy. The TD, x-plane rotation (symphyseal-mid-sacrum distance (SMS)), and y-plane tilt (sacroiliac joint-symphysis distance (SIS)) were measured by four independent observers. Interobserver reliability was assessed using intraclass correlations. RESULTS: TD was altered by less than 2 mm with up to 7.5° fluoroscopic rotation (SMS: 3 cm) and up to 30° of inlet and 15° of outlet (SIS: ± 3.3 cm). SMS distance effectively corresponded to the degree of rotation present (r = 1.00, CI: 0.97 to 1.00, p < 0.0001) and was strongly correlated to TD (r = -0.95, CI: -0.99 to -0.67, p = 0.001). SIS distance effectively corresponded to the degree of tilt present (r = -0.97, CI: -0.99 to -0.88, p < 0.0001) and was correlated to TD (r = 0.94, CI: 0.75 to 0.99, p = 0.0001). Linear regression models determined that, with every degree of rotation and tilt, TD was altered by 0.4 mm and 0.09 mm, respectively (p = 0.0004, r2 = 0.93 and p < 0.0001, r2 = 0.94, respectively). Interobserver reliability among observers was excellent (0.92). CONCLUSION: The TD has excellent interobserver reliability and is minimally impacted by up to 7.5° of rotation, 30° inlet tilt, and 15° of outlet tilt. Utilization of these thresholds may ensure reliability of TD measurements when assessing pelvis stress radiographs.