Faculty Bibliography

STUDY DESIGN/METHODS:Retrospective analysis of outcomes in single-level spine and primary hip and knee arthroplasty patients. OBJECTIVE:Compare baseline and post-operative outcomes in patients undergoing spine surgery procedures with total hip arthroplasty (THA) and total knee arthroplasty (TKA) to further define outcomes in orthopedic surgery. SUMMARY OF BACKGROUND DATA/BACKGROUND:Computer-adaptive Patient Reported Outcome Information System (PROMIS) allows for standardized assessment of the Health Related Quality of Life across different disease states. METHODS:Patients who underwent spine surgery (anterior cervical discectomy and fusion, cervical disc replacement, lumbar laminectomy, microscopic lumbar discectomy, transforaminal lumbar interbody fusion or adult reconstruction surgery (THA, TKA) were grouped. Mean Charlson Comorbidity Index (CCI), Baseline (BL) and 6-month (6 M) PROMIS scores of Physical Function, Pain Interference, and Pain Intensity were determined. Paired t-tests compared differences in CCI, BL, 6 M, and change in PROMIS scores for spine and adult reconstruction procedures. RESULTS:304 spine surgery patients (Age=58.1 ± 15.6; 42.9% Female) and 347 adult reconstruction patients (Age=62.9 ± 11.8; 54.1% Female) were compared. Spine surgery groups had more disability and pain at baseline than adult reconstruction patients according to Physical Function [(21.0, 22.2, 9.07, 12.6, 10.4) vs (35.8, 35.0), respectively, p < .01], Pain Interference [(80.1, 74.1, 89.6, 92.5, 90.6) vs (64.0, 63.9), respectively, p < .01] and Pain Intensity [(53.0, 53.1, 58.3, 58.5, 56.1) vs (53.4, 53.8), respectively, p < .01]. At 6 M, spine surgery patients remained more disabled and had more pain compared to adult reconstruction patients. Over the 6-month timespan, spine patients experienced greater improvements than adult reconstruction patients in terms of Physical Function [(+8.7, +22.2, +9.7, +12.9, +12.1) vs (+5.3, +3.9), respectively, p < .01] and Pain Interference scores [(-15.4, -28.1, -14.7, -13.1, -12.3) vs (-8.3, -6.0), respectively, p < .01]. CONCLUSIONS:Spinal surgery patients had lower BL and 6 M PROMIS scores, but greater relative improvement in PROMIS scores compared to adult reconstruction patients. LEVEL OF EVIDENCE/METHODS:3.

Background/UNASSIGNED:Specialized tables for direct anterior (DA) approach total hip arthroplasty (THA) have required an unscrubbed assistant for manipulation of the operative limb. A novel surgical table attachment designed for the DA approach is fully surgeon controlled and partially automated. The purpose of this study is to compare the clinical outcomes in patients who underwent THA through a DA approach with an assistant-controlled vs the surgeon-controlled (SC) table. Methods/UNASSIGNED:This is a retrospective study of 343 patients who underwent primary THA between January 2017 and October 2017. Two cohorts were established based on the surgical table used. Surgical and clinical data included the surgical time, length of stay, presence of pain (groin, hip, or thigh pain) at latest follow-up, and revision for any reason. Immediate postoperative radiographs were compared with latest follow-up radiographs to assess for leg length discrepancy, stem alignment, and stem subsidence. Results/UNASSIGNED:< .001). Neither group experienced any intraoperative fractures or postoperative dislocations. There were no significant differences in any other clinical or radiographic outcomes. Conclusions/UNASSIGNED:Although the surgical time with the self-controlled table was longer by approximately 4 minutes, this discrepancy disappeared with progression through the learning curve. In our experience, the SC table allows for greater autonomy for the operating surgeon and eliminates the need for a full-time employee in the operating room workflow.

BACKGROUND:The direct anterior approach (DAA) in total hip arthroplasty (THA) has gained popularity because of potential decreased postoperative pain and quicker recovery after surgery in comparison to the posterior approach (PA). With a growing focus on patient-reported outcome (PRO) measurements after surgery, we sought to determine if one approach led to better PRO scores as determined by the Forgotten Joint Score-12 (FJS-12) questionnaire. METHODS:A retrospective chart review of primary THAs between September 2016 and September 2019 at a single academic hospital was conducted. Demographic and clinical data in addition to FJS-12 scores were collected. Two groups were created based on THA approach. Frequency rates, means, and standard deviations were used to describe baseline patient characteristics. Differences in demographic data were accounted for using linear regression models. RESULTS:A total of 1469 cases were identified, with 830 using the DAA and 639 the PA. Significant demographic differences were observed between the 2 groups. However, when controlling for this, there were no differences in FJS-12 scores between approaches at 1 and 1.75 years (P = .232 and P = .486, respectively). At 12 weeks, DAA patients had higher satisfaction (59.21 vs 46.8; P = .006). When controlling for surgeon case volume, no differences in FJS-12 were observed at any of the time points (P = .536, P = .452, and P = .967, respectively) CONCLUSION: DAA THA patients trended toward better PRO scores than their PA counterparts. However, when controlling for surgeon case volume, no differences were observed, which suggests that surgeon case volume and experience have an important effect on patient satisfaction and FJS-12 scores.

Background/UNASSIGNED:There has been increasing interest in performing primary hip and knee replacement with same-day discharge (SDD). The purpose of this study is to compare patient-reported outcome (PRO) scores, pain scores, and readmissions in patients who underwent SDD total hip arthroplasty (THA) with those in patients who underwent traditional inpatient THA. Methods/UNASSIGNED:A retrospective study was conducted on 963 patients who underwent primary THA at our institution between September 2016 and December 2018. Two cohorts were established based on whether the patient underwent SDD or traditional inpatient THA. An electronic physical engagement application was used to collect PRO scores (Hip Disability and Osteoarthritis Outcome Score for Joint Replacement, Veterans Rand 12-Item Health Survey Physical Component Score, and Mental Component Score) and pain scores. To control for demographic variables, a multiple regression analysis of PRO scores was conducted. Results/UNASSIGNED:Four hundred fifteen (43.1%) patients in this study underwent the SDD protocol. There were significant differences between both cohorts with respect to sex, age, body mass index, American Society of Anesthesiologists score, and smoking status. The bivariate analysis revealed that the SDD cohort had a significantly greater change in the Veterans Rand 12-Item Health Survey Physical Component Score and had fewer readmissions. Both cohorts had equivalent decreases in pain scores. After controlling for demographic variables in a multivariable analysis, the SDD cohort was found to have higher PRO scores at all time points, but there were no significant differences in the change in PRO scores over time between both groups. Conclusion/UNASSIGNED:Patients in an SDD THA care pathway experienced similar improvements in PRO scores and clinically equal reduction in pain scores.

BACKGROUND:Obesity has been considered a relative contraindication to performing a direct anterior approach total hip arthroplasty (DAA-THA) since it is hypothesized to lead to component malpositioning and poor outcomes. Fluoroscopy-assisted DAA-THA has been reported to diminish variability in acetabular component positioning. However, fluoroscopy-assisted DAA-THA in the obese patients has not been well described. We report on a single surgeon consecutive series of fluoroscopy-assisted primary DAA-THA's examining the radiographic and perioperative outcomes in obese patients. METHODS:A retrospective review was conducted of 509 consecutive unilateral fluoroscopy-assisted DAA-THAs on a specialized orthopaedic table performed by a single surgeon. All patients were divided into three cohorts according to their body mass index (BMI): Group I (< 30 kg/ m2 ), Group II (≥ 30 to < 35 kg/m2 ), and Group III (≥ 35 kg/ m2 ). Perioperative parameters, outcome scores (EuroQol 5 Dimension and hip disability and osteoarthritis outcome scores), and radiographs were comparatively assessed. Cup position was determined using Widmer's method. RESULTS:A total of 492 DAA-THAs (minimum follow-up: 2.1 years) with appropriate radiographs were analyzed. Of which 356 (72.2%) were in Group I (average: 25.1 kg/m2 ), 105 (21.3%) in Group II (average: 32 kg/m2 ), and 31 (6.5%) in Group III (average: 38.6 kg/m2 ). There were no differences in any parameters between Group II and III. Group I differed in average age and included more female patients than Groups II and III. There was a statistically significant difference in cup anteversion between all groups with average measurements of 20.8°, 19.5°, and 17.6°, respectively. No other differences were identified in radiographic parameters or postoperative outcomes. CONCLUSIONS:There were no clinically relevant differences in component positioning or perioperative parameters between obese and non-obese patients. We do not consider a BMI ≥ 30 kg/m2 to be a contraindication for fluoroscopyassisted DAA-THA when performed by a surgeon experienced in the technique.

INTRODUCTION/BACKGROUND:Nonunion of a femoral periprosthetic fracture is a rare occurrence in orthopedic practice. Failure of a periprosthetic fracture to heal can lead to substantial disability and pain for patients as well as the potential need for component revision. Relatively little literature exists describing their management and outcome. METHODS:Eleven patients with femoral periprosthetic fracture nonunion who presented for tertiary care were enrolled in a prospective data registry. Patients were considered to have developed nonunion following failure of progression in radiographic and clinical healing for a 6-month period. All patients were seen at standard postoperative intervals, and outcomes were recorded using the Short Musculoskeletal Function Assessment (SMFA), visual analog scale (VAS) for pain, physical examination, and radiographic examination. Preoperative radiographs were reviewed for classification. RESULTS:Eleven patients had periprosthetic femoral fracture nonunion associated with prior hip (five patients) or knee (six patients) arthroplasty and were included in our study. Mean follow-up time was 30 months. Mean age at time of nonunion surgery was 64.5 years (range: 41.8 to 78.2 years). All patients underwent removal of previous fracture hardware at time of nonunion surgery. Ten (91%) of 11 received autogenous iliac crest bone grafting at time of nonunion surgery. Ten (91%) of the 11 patients went on to union without further intervention. Mean time to union was 7.9 months (SD: 8.0). The one patient that developed a persistent nonunion was complicated by infection requiring multiple irrigation and debridement procedures and total hip explant. The mean improvement in total SMFA score from baseline to final follow-up was 22.6 (p = 0.030). The greatest functional improvement was in the bothersome index at 28.0 (p = 0.028). The mean improvement in VAS pain score from baseline to final follow-up was 4.5 (p = 0.013). DISCUSSION/CONCLUSIONS:Periprosthetic fracture nonunions can be successfully treated with operative intervention aimed at compression plating with bone graft and retention of primary components. In addition, successful periprosthetic nonunion repair improves function and pain in these patients.

BACKGROUND:Total hip arthroplasty (THA) candidates have historically received high doses of opioids within the perioperative period; however, the amounts are being continually reduced as awareness of opioid abuse spreads. Here we seek to evaluate the effectiveness of a novel opiate-sparing protocol (OSP) for primary THAs in reducing opiate administrations, while maintaining similar levels of pain control and postoperative function. METHODS:All patients undergoing primary THA between January 1, 2019 and June 30, 2019 were placed under a novel OSP. Data were prospectively collected as part of standard of care. To assess the primary outcome of opiate consumption, nursing documented opiate administration events were converted into morphine milligram equivalences (MMEs) per patient encounter per 24-hour interval. Postoperative pain and functional status were assessed as secondary outcomes using the Verbal Rating Scale for pain and the Activity Measure for Post-Acute Care scores, respectively. RESULTS:One thousand fifty primary THAs had received our institution's OSP, and 953 patients were utilized as our historical control. OSP patients demonstrated significantly lower 0-24, 24-48, and 48-72 hours with less opiate administration variance (total MME: Control 75.55 ± 121.07 MME vs OSP 57.10 ± 87.48 MME; 24.42% decrease, P < .001). Although pain scores reached statistical significance between 0 and 12 (Control 2.09 vs OSP 2.36, P < .001), their differences were not clinically significant. Finally, OSP patients demonstrated a trend toward higher Activity Measure for Post-Acute Care scores across all 6 domains (total scores: Control 20.53 ± 3.67 vs OSP 20.76 ± 3.64, P = .18). CONCLUSION/CONCLUSIONS:Implementation of an OSP can significantly decrease the utilization of opioids in the immediate postoperative period. Inpatient opioid administration can be significantly reduced while maintaining a comparable and non-inferior level of pain and function.

BACKGROUND:There is an increasing utilization of same-day discharge total hip arthroplasty (SDD THA). As the Center for Medicare and Medicaid Services considers removing THA from the inpatient-only list, there is likely to be a significant increase in the number of Medicare patients undergoing SDD THA. Thus, there is a need to report on outcomes of SDD THA in this population. METHODS:A retrospective review was performed on 850 consecutive SDD THA patients including 161 Medicare patients. We compared failure to launch, complication, emergency department visit, and 90-day readmission rates between the Medicare and non-Medicare cohorts. RESULTS:The Medicare group was older and had less variability in their admission diagnosis. There was no significant difference in failure to launch, complication, emergency department visit, or 90-day readmission rates between Medicare and non-Medicare groups. CONCLUSION/CONCLUSIONS:The benefits of SDD THA can be safely extended to the carefully indicated and motivated Medicare patient.

BACKGROUND:Opioid prescriptions and subsequent opioid-related deaths have increased substantially in the past several decades. Orthopedic surgery ranks among the highest of all specialties with respect to the amount of opioids prescribed. We present here the outcomes of our opioid-sparing pain management pilot protocol for total hip arthroplasty (THA). METHODS:A retrospective study was conducted to assess outcomes before and after the implementation of an opioid-sparing pain management protocol for THA. Patients were divided into 2 cohorts for comparison: (1) traditional pain management protocol and (2) opioid-sparing pain management protocol. The Hip Disability and Osteoarthritis Outcome Score for Joint Replacement, pain severity using a Visual Analog Scale, and inpatient morphine milligram equivalents (MMEs) per day were compared between the 2 cohorts. RESULTS:No statistically significant difference was observed in Hip Disability and Osteoarthritis Outcome Score for Joint Replacement between the 2 cohorts at any time point (P > .05). Although there was a significant decrease in pain scores over time (P < .01), there was no statistically significant difference in the rates of change between the 2 pain management protocols at any time point (P = .463). Inpatient opioid consumption was significantly lower for the opioid-sparing cohort in comparison to the traditional cohort (14.6 ± 16.7 vs 25.7 ± 18.8 MME/d, P < .001). Similarly, the opioid-sparing cohort received significantly less opioids than the traditional cohort during the post discharge period (13.9 ± 24.2 vs 80.1 ± 55.9 MME, P < .001). CONCLUSION/CONCLUSIONS:The results of this study suggest that an opioid-sparing protocol reduces opioid consumption and provides equivalent pain management and patient-reported outcomes during the 90-day THA episode of care relative to a traditional opioid-based regimen. These findings may help decrease the risk of adverse events associated with postoperative opioid use and provide a means of decreasing the opioid footprint in clinical practice.

OBJECTIVE:To determine if hip 3D-MR imaging can be used to accurately demonstrate femoral and acetabular morphology in the evaluation of patients with femoroacetabular impingement. MATERIALS AND METHODS/METHODS:We performed a retrospective review at our institution of 17 consecutive patients (19 hips) with suspected femoroacetabular impingement who had both 3D-CT and 3D-MRI performed of the same hip. Two fellowship-trained musculoskeletal radiologists reviewed the imaging for the presence and location of cam deformity, anterior-inferior iliac spine variant, lateral center-edge angle, and neck-shaft angle. Findings on 3D-CT were considered the reference standard. The amount of radiation that was spared following introduction of 3D-MRI was also assessed. RESULTS:All 17 patients suspected of FAI had evidence for cam deformity on 3D-CT. There was 100% agreement for diagnosis (19 out of 19) and location (19 out of 19) of cam deformity when comparing 3D-MRI with 3D-CT. There were 3 type I and 16 type II anterior-inferior iliac spine variants on 3D-CT imaging with 89.5% (17 out of 19) agreement for the anterior-inferior iliac spine characterization between 3D-MRI and 3D-CT. There was 64.7% agreement when comparing the neck-shaft angle (11 out of 17) and LCEA (11 out of 17) measurements. The use of 3D-MRI spared each patient an average radiation effective dose of 3.09 mSV for a total reduction of 479 mSV over a 4-year period. CONCLUSION/CONCLUSIONS:3D-MR imaging can be used to accurately diagnose and quantify the typical osseous pathological condition in femoroacetabular impingement and has the potential to eliminate the need for 3D-CT imaging and its associated radiation exposure, and the cost for this predominantly young group of patients.