Patients With Mild Osteoarthritis Are Less Likely to Achieve a Clinically Important Improvement in Pain or Function After Anatomic Total Shoulder Arthroplasty.

BACKGROUND: The severity of glenohumeral osteoarthritis (OA) as demonstrated by preoperative radiographs and patient-reported pain plays an important role in the indication for anatomic total shoulder arthroplasty (aTSA). In hip and knee research, data about the effect of the severity of preoperative radiographic OA on the outcome of total joint arthroplasty have been mixed. For shoulder replacement, we are unsure of the effects of radiographic severity on outcomes. QUESTIONS/PURPOSES: This study investigated whether the preoperative radiographic severity of glenohumeral OA is associated with improvement in pain and function after aTSA. We asked, (1) does the severity of glenohumeral OA correlate with improvement in patient-reported outcomes after TSA (delta American Shoulder and Elbow Surgeons score [postoperative-preoperative], delta Single Assessment Numeric Evaluation, delta Simple Shoulder Test, and delta VAS)? (2) Is having mild osteoarthritis associated with not meeting the minimum clinically important differences in preoperative and postoperative American Shoulder and Elbow Surgeons scores? METHODS: An institutional query of patients who underwent aTSA for OA was performed between January 2015 and December 2018. A total of 1035 patients were eligible; however, only patients with adequate preoperative radiographs and patient-reported outcome measures collected preoperatively and at a minimum of 2 years postoperatively were included. Patients with proximal humerus fractures, inflammatory arthropathy, cuff tear arthropathy, prior ipsilateral rotator cuff repair, brachial plexus injury or neuromuscular disorder, workers compensation, periprosthetic joint infection, or revision surgery within 2 years were excluded. Patient characteristics, comorbidities, and prior shoulder surgery were recorded. The severity of OA was classified based on the modified Samilson-Prieto and Walch classification. The association between Samilson-Prieto grade and patient-reported outcome measures (American Shoulder and Elbow Surgeons Score, Single Assessment Numeric Evaluation, Simple Shoulder Test, and VAS score) was evaluated. Radiographic characteristics, patient demographics, comorbidities, and prior surgery were also evaluated for the potential risk of not achieving improvement in the minimum clinically important difference (16.1) with respect to the American Shoulder and Elbow Surgeons score. The American Shoulder and Elbow Surgeons score is scored 0 to 100, with higher scores representing less pain and better function. A total of 206 patients (20% of those eligible) with a mean follow-up of 2.3 years were included. Twenty-three patients had Samilson-Prieto Grade I, 38 had Grade II, 57 had Grade III, and 88 had Grade IV. RESULTS: There were no differences in improvements (delta) between the groups and between patient-reported outcome scores (American Shoulder and Elbow Surgeons score, Single Assessment Numeric Evaluation, Simple Shoulder Test, and VAS). Compared with patients with more severe osteoarthritis (Samilson-Prieto Grades II, III, and IV), a higher proportion of patients with less severe osteoarthritis (Grade I) did not exceed the minimum clinical important difference for the American Shoulder and Elbow Surgeons score (22% [five of 23] versus 4% [seven of 183]; odds ratio 0.14 [95% confidence interval 0.04 to 0.520]; p = 0.006). CONCLUSION: The improvement in patient-reported outcome measure scores was similar regardless of radiographic severity after aTSA. Surgeons should use caution when recommending surgery to patients with less severe OA because a higher percentage did not improve, based on the minimum clinically important difference. LEVEL OF EVIDENCE: Level III, therapeutic study.

Establishing maximal medical improvement following aseptic revision of shoulder arthroplasty.

BACKGROUND: Shoulder arthroplasty surgery volume continues to increase yearly. As the prevalence of shoulder replacement continues to rise, there will be a growing number of revision surgeries performed for a variety of indications. Understanding patient outcomes and recovery time following these procedures is critical, particularly as it relates to revision surgery, which generally has worse outcomes and longevity than primary arthroplasty. The point at which the peak of potential improvement is reached can be defined as the point of maximal medical improvement (MMI). The timing to MMI has previously been reported in the literature following both primary anatomic and reverse total shoulder arthroplasty. However, to our knowledge, timing to MMI following revision shoulder arthroplasty has not been defined. The purpose of the present study, therefore, is to establish the time to MMI following aseptic revision shoulder arthroplasty using validated patient-reported outcome measures. MATERIALS AND METHODS: A retrospective cohort study was conducted following patients who underwent aseptic revision shoulder arthroplasty over a defined 3-year period. Multiple fellowship-trained shoulder and elbow surgeons from a single institution performed all operations. Those with at least 24 months of follow-up and multiple time points of postoperative patient-reported outcome scores were included in the analysis. American Shoulder and Elbow Surgeons Standardized Shoulder Assessment Form (ASES) scores and Single Assessment Numeric Evaluation (SANE) scores were prospectively recorded and followed over time. Exclusion criteria included revision surgeries done for infection, staged procedures following infection, and revision for periprosthetic fracture. RESULTS: Twenty-two patients met inclusion criteria. The mean preoperative ASES and SANE scores were 41.8 and 30.5, respectively. There was a trend toward improvement in both the ASES and SANE scores through the 6-9-month postoperative follow-up point, at which point clinically significant improvement was achieved, with mean values of, respectively, 76.9 and 81.2. No further improvement was achieved 9 months after surgery, although scores were generally maintained through an average final follow-up of 30 months, with final ASES and SANE scores of 70.1 and 67.8, respectively. CONCLUSIONS: Following aseptic revision shoulder arthroplasty, clinically significant improvements in patient-reported outcome scores are seen up to 9 months postoperatively, the point at which MMI is achieved. These findings serve to guide clinicians in counseling patients regarding their expected postoperative recovery following revision shoulder arthroplasty.

Postoperative stiffness after reverse total shoulder arthroplasty.

Purpose: The purpose of this study was to evaluate the rate and risk factors for stiffness after reverse shoulder arthroplasty and the ramifications on the patient-reported outcomes. Method: A consecutive series of patients who underwent reverse shoulder arthroplasty were prospectively followed for one year. Passive range of motion was measured preoperatively and at regular intervals postoperatively. Patients with passive forward elevation of less than 100° or passive external rotation of less than 30° were defined as stiff. Radiographic parameters and postoperative patient-reported outcome scores were collected. Results: Seventy-six patients were available for review. The prevalence of postoperative stiffness following reverse shoulder arthroplasty was 47% at three months, 31% at six months, and 25% at one year. Preoperative shoulder stiffness was associated with three-month postoperative stiffness only. In patients with one-year stiffness, smaller (p = 0.03) and less lateralized glenospheres (p = 0.024) were more common. Stiffness was not associated with one-year patient-reported outcome scores. Conclusion: Stiffness is common after reverse shoulder arthroplasty and often improves at one-year after surgery. Implant design and selection may be important determinants of passive range of motion. While stiffness does not appear to influence patient-reported outcome scores, one of four patients will potentially have stiffness one year following reverse shoulder arthroplasty.Level of evidence: Level III; retrospective study.

Modified Weaver-Dunn Technique Using Transosseous Bone Tunnels and Coracoid Suture Augmentation.

INTRODUCTION: A modified Weaver-Dunn procedure for the management of acromioclavicular joint injuries that uses transosseous bone tunnels and coracoid suture augmentation is described with associated clinical results. METHODS: A retrospective review of 39 consecutive patients who underwent a primary mWD procedure by a single surgeon from January 2013 to July 2019 was conducted. Patient charts and radiographs were reviewed for clinical course, complications and management, and radiographic evaluation. Satisfaction, American Shoulder and Elbow Surgeons (ASES), Single Assessment Numeric Evaluation, and Simple Shoulder Test scores were obtained. RESULTS: A total of 28 patients (72%) with a mean follow-up of 37.5 (12 to 84 months) and a mean age of 44.3 ± 15.1 years were included. Postoperative ASES, Simple Shoulder Test, Single Assessment Numeric Evaluation, and satisfaction scores were 90.6 ± 14.2, 11.1 ± 1.5, 87.3 ± 10.2, and 4.4 ± 1.2 (out of 5), respectively, with a significant improvement in ASES of 42.2 ± 21.8 points (P < 0.001). All patients had significant decrease in coracoclavicular distance (P < 0.001). Three patients (10.7%) had complications, with two (7.1%) requiring additional surgery. CONCLUSION: Excellent functional and radiographic outcomes can be achieved with this modified Weaver-Dunn technique. Complication and revision rates are comparable with those that are found in the literature. LEVEL OF EVIDENCE: Level IV, Retrospective cohort study.

Radiographic Severity May Not be Associated with Pain and Function in Glenohumeral Arthritis.

BACKGROUND: Despite the routine use of plain radiographs to stratify the severity of glenohumeral osteoarthritis, little is known about the relationship between radiographic measures and patient-perceived pain and function. QUESTIONS/PURPOSES: (1) What radiographic findings are associated with worse pain and function in patients with glenohumeral osteoarthritis? (2) What demographic factors are associated with worse pain and function in patients with glenohumeral osteoarthritis? METHODS: This retrospective study included patients presenting for an initial office visit for primary glenohumeral osteoarthritis. Patients with other concurrent shoulder pathologic findings, prior surgery, lack of pain and functional scores, recent injection, or inadequate radiographs were excluded. Between January 2017 and January 2019, 3133 patients were eligible based on these inclusion criteria; 59% (1860) had outcome assessments and 48% (893) of those had radiographs. An additional 42% (378) of those with radiographs were excluded because of other shoulder findings, recent injection, prior surgery, or inadequate radiographs, leaving 16% (515 of 3133) who were fully analyzed in this study. A radiographic review included the joint space width, posterior humeral head subluxation, inferior humeral head osteophyte size, cystic change, and head asphericity. Additionally, radiographic arthritis was classified according to the Walch, Samilson-Prieto, and Kellgren-Lawrence classifications by two separate reviewers. Radiographic and demographic criteria as well as the presence of psychologic or mental illness were correlated with VAS Pain (range 1-10; minimal clinically important difference [MCID] 1.6), American Shoulder and Elbow Surgeons (ASES; range 0-100; MCID 13.6), Single Assessment Numeric Evaluation (SANE; range 0-100; MCID 14), and Simple Shoulder Test (SST; range 0-12; MCID 1.5) scores using univariate and multivariable regression analyses. RESULTS: After accounting for age, gender, and psychologic illness in the multivariable analysis, we found that patients with Samilson-Prieto Grade 4 arthrosis had lower VAS Pain scores (ß = -1.9; p = 0.02) than those with Grade 0 or 1 did; however, no clinically important associations were found between Samilson-Prieto Grade 4 and ASES (ß = 7; p = 0.25), SANE (ß = 4; p = 0.63), or SST (ß = 0.5; p = 0.62) scores. No clinically important associations were found between Kellgren-Lawrence Grade 3 and VAS Pain (ß = 1.4; p = 0.10), ASES (ß = -8; p = 0.22), SANE (ß = -13; p = 0.11), or SST scores (ß = 0.4; p = 0.66). Radiographic joint space and posterior subluxation also did not have any clinically important associations with VAS Pain or functional scores. In assessing Walch glenoid type, there was no clinically important association between glenoid type and VAS Pain (F = 3.1; p < 0.01), ASES (F = 1.9; p = 0.15), SANE (F = 0.45; p = 0.66), or SST scores (F = 0.76; p = 0.71). Men had higher SST scores than women did (ß = 2.0; p < 0.01), but there were no clinically important differences in VAS Pain (ß = -0.4; p = 0.04), ASES (ß = 6; p < 0.01), or SANE (ß = 4; p = 0.07) scores. No clinically important association was found between age or the presence of any psychologic illness and VAS Pain or functional scores. CONCLUSION: In patients with glenohumeral arthritis, no consistent clinically important differences in pain or function were discovered with respect to radiographic or demographic factors. Surgeons should understand that the pain levels of patients with glenohumeral arthritis may not parallel radiographic severity. Future studies can build on these findings by examining other non-radiographic or demographic factors that affect pain in patients with shoulder arthritis, such as psychological factors. LEVEL OF EVIDENCE: Level III, prognostic study.

Structures Endangered During Minimally Invasive Plate Osteosynthesis of the Upper Extremity.

Minimally invasive plate osteosynthesis is a surgical technique that is becoming increasingly common because radiographic images and implant technologies advance in capabilities. It is imperative for surgeons to enhance their understanding of the surgical anatomy related to new approaches for fracture fixation. While performing minimally invasive plate osteosynthesis, there is a danger of injuring structures in the common percutaneous and submuscular pathways. We describe the critical anatomical structures in these pathways and tips for injury avoidance when operating on the clavicle, scapula, humerus, and wrist.

Outcomes of rotator cuff repair with concurrent microfracture of focal glenohumeral osteoarthritis.

BACKGROUND: The benefit of rotator cuff repair (RCR) in patients with concurrent osteoarthritic changes remains unclear. RCR has the theoretical potential to increase the compressive force across the glenohumeral joint, further exacerbating osteoarthritis pain. The purpose of this study is to investigate pain relief and patient-reported outcomes of patients undergoing simultaneous RCR and microfracture of focal glenohumeral osteoarthritis. METHODS: Thirty-four patients undergoing simultaneous RCR and microfracture were retrospectively reviewed at a minimum 1-year follow-up. Patient demographics, preoperative range of motion, functional outcomes (visual analog scale [VAS], Single Assessment Numeric Evaluation [SANE], American Shoulder and Elbow Surgeons Standardized Shoulder Assessment Form [ASES], and Simple Shoulder Test [SST]), and operative metrics were recorded. The patients were then contacted to obtain postoperative functional outcome scores (VAS, SANE, ASES, and SST). RESULTS: Twenty-seven patients (11 male/16 female [79%]) were evaluated at a mean follow-up of 25.8 months (range, 12-46). The average age at surgery was 64.9 years (range, 56-78). Chronic tears were more common than acute tears (57.7% vs. 42.3%). The majority of patients had a full rotator cuff tear (89%) involving a mean 1.7 ± 0.8 tendons (range, 1-3). Eighty-eight percent of the humeral lesions were Outerbridge 4 compared with 84% on the glenoid. The mean estimated involvement between the 2 groups with 38.4% ± 18.4% of the humeral head involved and 34.6% ± 18.4% of the glenoid involved. PRO scores improved postoperatively with a reduction in mean VAS (6.6-2.0, P < .01), SANE (33.8-79.8, P < .01), ASES (38.0-80.9, P < .01), and SST (3.07-9.70, P < .01) scores. Cumulatively, only 52% (14/27) of the patients improved, however, by the MCID for all collected PROs. CONCLUSIONS: Our results demonstrate modest improvements in postoperative pain and functional scores at a minimum of 1-year follow-up in a cohort of patients who have undergone RCR and glenohumeral microfracture. In cases of small focal lesions of full-thickness cartilage loss, RCR with microfracture is a reasonable treatment option; however, patients should be counseled on expectations accordingly.

Three-dimensional measures of posterior bone loss and retroversion in Walch B2 glenoids predict the need for an augmented anatomic glenoid component.

HYPOTHESIS: The purpose of this study is to evaluate whether the amount of measured posterior bone loss on 2- and 3-dimensional (2D and 3D) imaging of Walch B2 glenoids can reliably predict the plan for an augmented anatomic glenoid component. METHODS: Patients with Walch B2 glenoids and preoperative computed tomography (CT) scans were retrospectively identified. 2D axial CT scans were reviewed and posterior bone loss was measured by 3 independent reviewers. Images were then formatted into BluePrint (Wright Medical) preoperative planning software. The same 3 reviewers again measured posterior bone loss on 3D imaging. Additionally, all cases were planned with BluePrint software. An augment was used when the following criteria were unable to be satisfied with standard implants: <10° retroversion, <10° superior inclination, ≥90% backside contact, <2 mm medial reaming, and ≤1 peg perforation. RESULTS: Forty-two patients were included in the final analysis with a mean age of 63.1 ± 6.3 years. As measured by BluePrint, the mean retroversion was 23° ± 7° (range = 9°-40°), the mean superior inclination was 5° ± 6° (range = -9° to 22°), and the mean posterior subluxation was 80% ± 17% (range = 41%-95%). The mean 2D bone loss measurements (3.5 ± 1.6 mm) were significantly lower than the mean 3D bone loss (4.0 ± 1.8 mm) measurements (P = .03). There was substantial agreement between reviewers on both 2D and 3D measurements with an interclass correlation of 0.815 (95% confidence interval [CI] 0.714-0.889, P < .001) and an interclass correlation of 0.802 (95% CI 0.683-0.884, P < .001), respectively. Augments were used in 73.8%, 63.4%, and 63.4% of cases by reviewers 1, 2, and 3, respectively, with moderate agreement with a Fleiss kappa of 0.592 (95% CI 0.416-0.769, P < .001). Augment size was moderately, positively correlated with the amount of bone loss on 3D imaging but not with 2D imaging. After multivariate logistic regression, both 3D bone loss and retroversion were found to be predictive for a plan to use an augment. CONCLUSION: Planning for a posterior augment in Walch B2 glenoids is better predicted with 3D imaging than with 2D imaging, as 2D imaging may underestimate posterior bone loss. Additionally, use of a larger augment size is moderately correlated with posterior bone loss on 3D imaging but not 2D imaging. Standard 2D imaging may be limited in cases of posterior bone loss, and 3D imaging may be beneficial for preoperative planning in Walch B2 glenoids.

Bone density of first and second segments of normal and dysmorphic sacra.

BACKGROUND: Iliosacral screw fixation is safe and effective but can be complicated by loss of fixation, particularly in patients with osteopenic bone. Sacral morphology dictates where iliosacral screws may be placed when stabilizing pelvic ring injuries. In dysmorphic sacra, the safe osseous corridor of the upper sacral segment (S1) is smaller and lacks a transsacral corridor, increasing the need for fixation in the second sacral segment (S2). Previous evidence suggests that S2 is less dense than S1. The aim of this cross-sectional study is to further evaluate bone mineral density (BMD) of the S1 and S2 iliosacral osseous pathways through morphology stratification into normal and dysmorphic sacra. MATERIALS AND METHODS: Pelvic computed tomography scans of 50 consecutive trauma patients, aged 18 to 50 years, from a level 1 trauma center were analyzed prospectively. Five radiographic features (upper sacral segment not recessed in the pelvis, mammillary bodies, acute alar slope, residual S1 disk, and misshapen sacral foramen) were used to identify dysmorphic characteristics, and sacra with four or five features were classified as dysmorphic. Hounsfield unit values were used to estimate the regional BMD of S1 and S2. Student's t-test was utilized to compare the mean values at each segment, with statistical significance being set at p < 0.05. No change in clinical management occurred as a result of inclusion in this study. RESULTS: A statistical difference in BMD was appreciated between S1 and S2 in both normal and dysmorphic sacra (p < 0.0001), with 28.4% lower density in S2 than S1. Further, S1 in dysmorphic sacra tended to be 4% less dense than S1 in normal sacra (p = 0.047). No difference in density was appreciated at S2 based on morphology. CONCLUSIONS: Our results would indicate that, based on BMD alone, fixation should be maximized in S1 prior to fixation in S2. In cases where S2 fixation is required, we recommend that transsacral fixation should be strongly considered if possible to bypass the S2 body and achieve fixation in the cortical bone of the ilium and sacrum. LEVEL OF EVIDENCE: Level III.

A Survey of High- and Low-Energy Acetabular Fractures in Elderly Patients.

INTRODUCTION: Geriatric patients represent 14% of acetabular fractures and are the fastest growing subset of patients affected by this injury in the US. Treatment outcomes have been reported as inferior to those achieved in younger patients after high-energy (HE) acetabular trauma. This study aimed to compare detailed demographic characteristics and clinical outcomes in elderly patients (≥65 years of age) treated in a tertiary North American trauma center for acetabular fractures after both high- and low-energy mechanisms of injury. METHODS: Patients (≥65 years of age) diagnosed with an acetabular fracture were identified over a 7-year period. Patient and injury characteristics were extracted from our institutional trauma database. Length of stay, intervention, operative details, disposition, complications, readmissions, and mortality were analyzed. RESULTS: One hundred nine patients were identified for inclusion. Low-energy mechanisms (simple falls) were found in 64 (58.7%) and HE mechanisms in 45 (41.3%) patients. The HE cohort was younger (74.6 vs 80.7 years; P < .001), had a higher male predominance (76% vs 56%; P = .10), a lower Charlson comorbidity index (1.29 ± 1.49 vs 2.16 ± 1.76; P = .01), and a higher injury severity score (19.90 ± 15.33 vs 6.46 ± 3.57; P < .001). Fracture patterns, described according to the Letournel-Judet classification, were similar between the 2 groups. Thirty-day mortality was significantly higher in the HE group (26.7% vs 3.1%; P < .001); however, the 1-year mortality rates were not statistically different (31.1% vs 25.0%; P = .20). DISCUSSION: Patients with acetabular fractures sustained due to HE accidents demonstrate significantly higher 30-day mortality rate than patients with low-energy fractures, but similar mortality 1 year after the injury, despite having a much lower mean age and fewer comorbidities. CONCLUSION: Medical efforts made during initial hospital admission may have the biggest impact on survivorship following acetabular fracture.

Comparing Different Surgical Techniques for Addressing the Posterior Malleolus in Supination External Rotation Ankle Fractures and the Need for Syndesmotic Screw Fixation.

Trimalleolar ankle fractures are unstable injuries with possible syndesmotic disruption. Recent data have described inherent morbidity associated with screw fixation of the syndesmosis, including the potential for malreduction, hardware irritation, and post-traumatic arthritis. The posterior malleolus is an important soft tissue attachment for the posterior inferior syndesmosis ligament. We hypothesized that fixation of a sizable posterior malleolar (PM) fracture in supination external rotation type IV (SER IV) ankle fractures would act to stabilize the syndesmosis and minimize or eliminate the need for trans-syndesmotic fixation. A retrospective review of trimalleolar ankle fractures surgically treated from October 2006 to April of 2011 was performed. A total of 143 trimalleolar ankle fractures were identified, and 97 were classified as SER IV. Of the 97 patients, 74 (76.3%) had a sizable PM fragment. Syndesmotic fixation was required in 7 of 34 (20%) and 27 of 40 (68%), respectively, when the PM was fixed versus not fixed (p = .0002). When the PM was indirectly reduced using an anterior to posterior screw, 7 of 15 patients (46.7%) required syndesmotic fixation compared with none of 19 patients when the PM fragment was fixated with direct posterior lateral plate fixation (p = .0012). Fixation of the PM fracture in SER IV ankle fractures can restore syndesmotic stability and, thus, lower the rate of syndesmotic fixation. We found that fixation of a sizable PM fragment in SER IV or equivalent injuries through posterolateral plating can eliminate the need for syndesmotic screw fixation.

Hoffa Fragments in the Geriatric Distal Femur Fracture: Myth or Reality?

BACKGROUND: Previous research reported the frequency of coronal plane (Hoffa) fractures in high-energy supracondylar femur fractures in a relatively young population. It is the purpose of this study to identify the frequency of coronal plane fractures seen in elderly patients. METHODS: All patients over the age of 18 years treated for supracondylar femur fractures at 2 level I trauma centers were reviewed over a 4-year period. The patients were stratified (≥60 years and <60 years) and compared to determine differences in injury characteristics and fracture patterns with special attention to the prevalence of coronal plane fractures. RESULTS: One hundred ten patients were identified with supracondylar femur fractures (12 Orthopaedic Trauma Association [OTA] 33A; 2 OTA 33B; 96 OTA 33C). Thirty-two of the 96 intercondylar fractures were in patients >60 years of age. The elderly group included a higher percentage of females (81% vs 36%, P = .0001) and was more likely to sustain their injury due to a fall (59% vs 19%, P = .0001). Coronal plane fractures were visualized on computed tomography scans in 56 (58%) of the 96 33C femur fractures. Forty-four percent of elderly patients sustained a coronal plane fracture compared with 66% of the younger cohort (P = .04). The percentage of open fractures (30% elderly vs 46%) was not significantly different between the 2 groups (P = .17). CONCLUSIONS: The occurrence rate of 44% in this study was higher than expected and is the first to provide this information in the elderly patients on this fracture. It is important that a high index of suspicion be maintained for the Hoffa fracture in all distal femur fractures, regardless of age or mechanism of injury.

The Role of Adjustable Scout Lines in Advanced Cervical Spinal Imaging.

STUDY DESIGN/SETTING: Retrospective cohort at a Level 1 trauma center. OBJECTIVE: To compare the anterior-posterior diameter of the cervical central canal using imaging software with both fixed and user-adjustable scout line axial images. SUMMARYOF BACKGROUND DATA: The majority of imaging software programs generate oblique axial images through the lordotic and kyphotic regions of the spine due to a fixed reference line. These oblique axial images are not representative of true canal diameter and often provide inaccurate representation of neural compression. METHODS: Thirty-three consecutive head trauma patients without evidence of pathology in the cervical spine from September 2011 were chosen for the study. The anterior-posterior diameter of the cervical (levels C2-T1) central canal was measured on axial slices using the default non-adjustable ("fixed") reference line on the picture archiving and communication viewer by three observers and then re-measured using an adjustable scout line on the midline sagittal that most bisected the endplates in a parallel fashion. The two measurements from the three independent observers were then compared directly for differences in the AP canal diameter at each level. RESULTS: The average difference between the measurements of the central canal using the fixed scout line versus the adjustable scout line ranged from -1.34±1.59 mm at the C2-C3 level to 1.78±2.32 mm at the C7-T1 level. Standard axial images of the cervical spine underestimated the canal space in the upper cervical spine and overestimated the space in the lower cervical spine. The measurement values using the fixed scout line versus the adjustable scout line did not correlate as indicated by low to moderate Pearson r and ICC values. CONCLUSIONS: There are clear differences between axial slices generated with adjusted and fixed scout lines particularly at disc levels that are not orthogonal to the screen edges.

A Patient Follow-up Program for Short-Term Surgical Mission Trips to a Developing Country.

BACKGROUND: We describe a follow-up program for patients undergoing surgical procedures with documented results from short-term surgical mission trips to the developing world. The surgical procedures were all performed at a government hospital in Pucallpa, Peru, a remote city in the Amazon. METHODS: Between July 2007 and January 2012, ten surgical mission trips were completed with a mean time of six days on location and a mean number of 2.3 surgeons (range, two to five surgeons) per trip. A Peruvian general surgeon conducted postoperative visits at time intervals of two to four weeks, five to sixteen weeks, four to seven months, and eight to twelve months. Each visit included the completion of a patient outcome form, radiographs, and functional range-of-motion photographs. Patient demographic characteristics; type of surgical procedure; completed follow-up; complications including infection, malunion, or nonunion; and clinical results were analyzed. RESULTS: Of the 127 patients eligible for analysis, twenty-three patients were lost to follow-up, leaving a follow-up rate of 81.9% (104 of 127 patients). Patients were predominantly male (63.5%) and had a mean age of 37.0 years (range, ten months to 93.4 years). The mean length of follow-up was 11.8 months, with a mean number of 3.7 postoperative encounters. Orthopaedic trauma fixation was the predominant surgical procedure (57%), with forty-two procedures (40%) being open reduction and internal fixation. In the 104 patients, successful wound-healing occurred in 101 (97%) and 100 (96%) had a functional outcome deemed to be good or fair by the in-country physician. The infection rate was 2.9% (three patients), with 97% (fifty-seven of fifty-nine) of fractures united. There was one nerve injury in a pediatric patient treated for supracondylar humeral malunion, and two cases of prominent implant necessitating removal. The mean direct cost of the follow-up program was $20,041 in U.S. dollars per year. CONCLUSIONS: It is possible to develop a sustainable surgical patient follow-up program with robust results and to achieve acceptable outcomes for orthopaedic conditions, even in an austere medical environment.

Orthopedic Residency: Are Duty Hours Predictive of Performance?

OBJECTIVE: This study examines the relationship between self-recorded resident work hours and Orthopedic In-training Examination (OITE) scores, resident clinical performance, and American Board of Orthopedic Surgery pass rates. The hypothesis of this study is that increasing duty hours would have a positive correlation with clinical and OITE performance. DESIGN: Total duty hours and recorded operating room hours from a single orthopedic residency program were extracted from 2006 to 2012. During the same time span, OITE scores, resident clinical scores from the E-Valuation system, and American Board of Orthopedic Surgery pass rates were collected. The correlation between the variables was assessed using the Pearson correlation coefficient's precision statistic. SETTING: A large public tertiary academic center in the upper Midwestern United States. PARTICIPANTS: A total of 82 orthopedic surgery residents over 7 years. RESULTS: A total of 82 residents were matriculated between 2006 and 2012. The average weekly recorded duty hours were as follows: postgraduate year 2 (PGY2) = 60 hours/week (Standard Deviation (SD) ± 4), PGY3 = 59 hours/week (SD ± 5), PGY4 = 51 hours/week (SD ± 4), PGY5 = 49 hours/week (SD ± 3). There was significant variability in the average number of hours worked among residents (range: 2128-3753h/y) for the full academic year. The OITE scores and the work hours were found to be independent of each other (ρ = 0.017, p = 0.825), and no correlation was found between OITE scores and the resident E-value scores (ρ = 0.071, p = 0.34). Residents spent 36% to 48% of their time in the operating room. Second year residents logging more hours scored higher on faculty evaluation of overall competency (ρ = 0.31, p = 0.035). Faculty assessment of technical skills had a positive correlation with operating room duty hours for PGY5 class (ρ = 0.346, p = 0.025). CONCLUSIONS: A large variation in duty hours exists between resident-logged duty hours. No correlation exists between in-training scores and duty hours. There is a positive correlation between senior resident operating room hours and technical skill scores.

Dorsal Screw Penetration With the Use of Volar Plating of Distal Radius Fractures: How Can You Best Detect?

OBJECTIVES: To evaluate the most vulnerable position at which volar plate screws may penetrate the dorsal cortex of the radius and to determine which specific intraoperative fluoroscopic images (lateral, 45 degrees supination, 45 degrees pronation, and dorsal tangential) are most useful to detect dorsal cortex penetration. METHODS: Four 2.5-mm locking screws were inserted distally using 18-, 20-, or 22-mm screws in 7 cadaveric specimens apiece. The specimens were then evaluated to count the number of screws breaching the dorsal cortex and the amount of penetration. Lateral, 45 degrees supination, 45 degrees pronation, and dorsal tangential fluoroscopic views were taken of each wrist. Sixty-three orthopaedic surgeons of varying experience were then asked to evaluate whether the screws penetrated the dorsal cortex after viewing each image. RESULTS: Dorsal cortex screw penetration of at least 1 screw occurred in 3.6% of specimens with 18-mm screws, 25% of specimens with 20-mm screws, and 57% specimens with 22-mm screws. Radial-sided screws more commonly breached the dorsal cortex. The sensitivity was 58% on the lateral view, 88% on the 45 degrees supination view, 53% on the 45 degrees pronation view, and 67% on the dorsal tangential view. Additionally, surgeons with more experience were less accurate in detecting prominent screws. CONCLUSIONS: Clinicians should consider use of these views to evaluate dorsal screw penetration after volar plating but may opt to subtract a few millimeters from their measured screw lengths to avoid over penetration past the dorsal cortex.

Outcomes after operative management of symptomatic rib nonunion.

OBJECTIVE: To report the outcomes of rib reconstruction after painful nonunion. DESIGN: Retrospective case series. SETTING: Level I trauma center. PATIENTS/PARTICIPANTS: Between November 2007 and May 2013, 10 patients who presented with 16 rib nonunions and disabling pain were treated with reconstruction of their nonunited rib fractures. INTERVENTION: Rib nonunion reconstruction predominately with iliac crest bone graft and a tension band plate with a locked precontoured plating system for ribs. MAIN OUTCOME MEASUREMENTS: Demographic data, mechanism of injury, and number of rib nonunions were recorded. Operative procedure, length of follow-up, complications, Short Form Survey 36, and a patient questionnaire were also captured and documented. RESULTS: Eight of the 10 patients sustained their original fractures from a fall. Outcomes were available for the 10 patients at a mean follow-up of up of 18.6 months (range, 3-46 months). All 16 ribs went on to union with a mean time from reconstruction to union of 14.7 weeks (range, 12-24 weeks). At final follow-up, the mean mental and physical component Short Form Survey 36 scores were 54.4 and 43.5, respectively. Eight of the 10 patients were able to return to work and/or previous activities without limitations. Complications included 1 wound infection that resolved after irrigation and debridement with adjunctive antibiotics. One symptomatic implant was removed. CONCLUSIONS: Ten patients with 16 symptomatic rib nonunions were reconstructed using autologous bone graft and implant/mesh fixation manifesting in successful union with improved patient function and a low rate of complications. LEVEL OF EVIDENCE: Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Quantitative comparison of exposure for the posterior Judet approach to the scapula with and without deltoid takedown.

BACKGROUND: The purposes of this study are to quantify the extent of the scapula exposed and to describe the osseous landmarks within the dissection of a posterior Judet approach with and without takedown of the posterior deltoid muscle. METHODS: The posterior Judet approach using the muscular interval between the teres minor and infraspinatus muscle with and without takedown of the deltoid muscle was performed on 10 fresh-frozen cadaveric shoulders. Retractors with 2 kg of force were used at the wound margins for retraction. Upon completion of the exposure, a calibrated digital image was taken from the surgeon's perspective and specific anatomic landmarks were identified. The digital images were then analyzed with a computer software program, ImageJ (National Institutes of Health, Bethesda, MD, USA), to calculate the area (in square centimeters) of bone exposed. RESULTS: The mean area of posterior scapula exposed by the traditional Judet approach with takedown of the deltoid muscle was 30.2 cm(2) (95% confidence interval, 27.7-32.7 cm(2)) compared with 27.3 cm(2) (95% confidence interval, 24.8-29.9 cm(2)) when the deltoid was not detached (P < .0001). In all 10 cadaveric shoulders, the posterior Judet approach without takedown of the deltoid muscle allowed access to the posterior glenoid, lateral scapula border, and spinoglenoid notch. CONCLUSIONS: Although takedown of the deltoid muscle improves exposure, the posterior Judet approach without takedown of the posterior deltoid muscle allows for safe exposure to 91% of the bony scapula obtained by removing the deltoid muscle and access to the critical osseous fixation points of the posterior scapula.

Cost savings analysis of intrawound vancomycin powder in posterior spinal surgery.

BACKGROUND CONTEXT: Recent studies have shown that prophylactic use of intrawound vancomycin in posterior instrumented spine surgery substantially decreases the incidence of wound infections requiring repeat surgery. Significant cost savings are thought to be associated with the use of vancomycin in this setting. PURPOSE: To elucidate cost savings associated with the use of intrawound vancomycin in posterior spinal surgeries using a budget-impact model. STUDY DESIGN: Retrospective cohort study. PATIENT SAMPLE: Data from a cohort of 303 patients who underwent spinal surgery (instrumented and noninstrumented) over 2 years were analyzed; 96 of these patients received prophylactic intrawound vancomycin powder in addition to normal intravenous (IV) antibiotic prophylaxis, and 207 received just routine IV antibiotic prophylaxis. Patients requiring repeat surgical procedures for infection were identified, and the costs of these additional procedures were elucidated. OUTCOME MEASURE: Cost associated with the additional procedure to remediate infection in the absence of vancomycin prophylaxis. METHODS: We retrospectively reviewed the cost of return procedures for treatment of surgical site infection (SSI). The total reimbursement received by the health care facility was used to model the costs associated with repeat surgery, and this cost was compared with the cost of a single local application of vancomycin costing about $12. RESULTS: Of the 96 patients in the treatment group, the return-to-surgery rate for SSI was 0. In the group without vancomycin, seven patients required a total of 14 procedures. The mean cost per episode of surgery, based on the reimbursement, the health care facility received was $40,992 (range, $14,459-$114,763). A total of $573,897 was spent on 3% of the 207-patient cohort that did not receive intrawound vancomycin, whereas a total of $1,152 ($12×96 patients) was spent on the cohort treated with vancomycin. CONCLUSIONS: This study shows a reduction in SSIs requiring a return-to-surgery-with large cost savings-with use of intrawound vancomycin powder. In our study population, the cost savings totaled more than half a million dollars.

The use of vancomycin powder reduces surgical reoperation in posterior instrumented and noninstrumented spinal surgery.

BACKGROUND: Surgical site infections can complicate posterior spine surgery. Multiple hospital admissions may be required to adequately treat a surgical site infection, which is associated with increased costs and lower patient satisfaction. The objective of this study was to evaluate the efficacy of prophylactic intra-wound vancomycin powder in reducing the incidence of repeat surgery for infections after posterior instrumented and noninstrumented spine surgery. METHODS: A series of consecutive patients who underwent instrumented or noninstrumented posterior spine surgery for any indication by two surgeons from July 2010 to July 2012 were reviewed. The preoperative antibiotic regimens of both surgeons were identical, except that one surgeon applied 1 g vancomycin powder directly to the surgical bed before wound closure, while the other did not. Patient demographics, operative details, and rates of reoperation for wound infection in the control and the treatment groups were compared. RESULTS: Both the control group and treatment group consisted of 150 patients; mean ages were 58.33 and 54.14 years, respectively. Both groups had low rates of deep infection requiring surgical intervention. The treatment group had a significantly lower rate of infection requiring reoperation or surgical debridement (0 %; 95 % CI: 0 %-2.4 %) compared with the control group (4 %; 95 % CI: 1.5 %-8.5 %) (P = 0.0297). The six infections identified in the control group resulted in 12 repeat operative debridement procedures. Gram-positive organisms were identified in 66.7 % of infections. No complications were related to the application of vancomycin powder. CONCLUSIONS: The results of this study demonstrate that adjunctive vancomycin powder applied directly to the surgical bed before closure seems effective in preventing deep infections that require operative debridement following posterior spine surgery.