Journal of the American Academy of Orthopaedic Surgeons最新文献

Hip-spine syndrome (HSS) is characterized by the presence of concurrent hip and spine degenerative conditions. It can be further classified as simple, secondary, complex, or misdiagnosis. Patients may present with a myriad of symptoms, including low back pain, groin pain, radicular leg pain, and neurogenic claudication, with or without neurological deficits. Treatment of HSS is complex and involves a multidisciplinary team of spine surgeons, hip surgeons, pain physiatrists, and physical therapists. In treating HSS, it is imperative to first identify the primary pain generator through a thorough hip and spine examination and diagnostic and therapeutic injections. The decision whether to operate on the hip or spine first is multifaceted and depends on clinical, radiographic, and surgical considerations. In this article, we review the most recent literature on the management of patients with HSS, with an emphasis on surgical treatment.

Introduction: Multimodal analgesia (MMA) is an alternative to patient-controlled analgesia (PCA) that reduces opioid usage after spine surgery and improves time to mobilization. The purpose of this study was to investigate whether MMA improves physical therapy performance, hospital length of stay (LOS), and disposition to home following major spinal reconstructive surgery.

Methods: The study is a pre- and postintervention retrospective cohort study evaluating a unique MMA protocol developed and implemented at our institution in 2022. Data were collected for patients who received PCA for 1 year before MMA implementation and patients who received MMA for 1-year postimplementation. All patients who underwent open, posterior lumbar fusion surgery ± decompression between 2 and 5 levels were included. Minimally invasive, anterior, and lateral procedures were excluded from the study. Data collected included numeric pain scores (0 to 10), LOS, and disposition to home versus inpatient rehabilitation. Chi-squared analysis was used to calculate P values, which were considered notable if P < 0.05. Logistic regression was used to model patient disposition status.

Results: Overall, there were 235 patients in the MMA group and 192 in the PCA group (total n = 427). Patient demographics were similarly matched between the cohorts. The MMA group demonstrated markedly longer walking distance (feet) at all stages of the postoperative period. The MMA group demonstrated shorter LOS and increased likelihood of being discharged home versus inpatient rehabilitation. Logistic regression analysis revealed 2.96 times increased odds of home discharge after MMA.

Conclusion: Our MMA protocol was superior to PCA in treating pain and improving LOS and disposition status in patients undergoing multilevel spinal fusion. Our findings suggest that MMA may be preferable to PCA in the treatment of postoperative pain after multilevel thoracolumbar spinal fusions.

Introduction: Entities such as The Centers for Medicare & Medicaid Services and the Agency for Healthcare Research and Quality include a large swath of heterogenous hip fracture diagnoses together when defining this injury. However, it is unclear if these broad definitions are in line with those of physicians who treat these injuries. We queried orthopaedic surgeons to understand how they would define a hip fracture and how their definition compares with the ones currently in use by healthcare agencies.

Methods: We conducted an internet-based survey of orthopaedic surgeons to ascertain which standard hip fracture types they felt should be included in a modified hip fracture definition (MHFD), along with querying their current treatment practices. We also compared outcomes, medical comorbidities, and spending across patients captured in the different diagnosis groups.

Results: Eighty-five orthopaedic surgeons completed the survey, and almost all of them felt that a femoral neck (96.5%) and intertrochanteric (95.3%) fracture should be included in the MHFD, while almost half (49.4%) would include the subtrochanteric region, and just over a quarter (27.1%) would incorporate the femoral head or a stable greater or lesser trochanter fracture. Treatment practices were largely in line with current research and patients captured by the new MHFD tended to have more procedures performed, have higher inpatient costs, and be discharged to higher levels of care compared with hip fracture patients not included in this new definition.

Conclusion: There should be caution when using current hip fracture definitions from healthcare agencies because they do not align well with those used by practicing orthopaedic surgeons. Efforts to enhance this definition should be explored because quality improvement programs are limited by a heterogenous definition of this injury.

Objective: To determine the prevalence of gluteal tendon pathology among patients with osteoarthritis (OA) undergoing total hip arthroplasty (THA) and to examine potential effects on postoperative outcomes.

Methods: Patients who underwent direct anterior THA for OA between 2010 and 2022 were identified using an institutional total Mayo Clinic Joint Replacement Database. Those with MRI of the surgical hip obtained ≤1 year before surgery were included and categorized according to the presence of gluteal tendon tear, tendinopathy, or no pathology. Postoperative outcomes were evaluated using visual analog scale (VAS) at rest, VAS with use, Hip Disability and Osteoarthritis Outcome Score Pain, Forgotten Joint Score-12, and modified Harris Hip score.

Results: Twenty-three hips with gluteal tears (9 of 23 male, mean age 63.5 ± 29.3 years), 48 with tendinopathy (20 of 48 male, mean age 58.8 ± 10.4 years), and 8 with no pathology on MRI (6 of 8 male, mean age 42.4 ± 18.9 years) were followed for 4.9 ± 3.0 years (range 1.2 to 13.2 years) following THA. Among patients with gluteal tear or tendinopathy, preoperative MRI was done for suspected gluteal pathology in only 3 (13.0%) and 2 (4.2%) cases, respectively, with most cases noted incidentally. Nevertheless, all experienced notable improvement in pain, satisfaction, and functional outcomes following surgery according to modified Harris Hip score score ( P ≤ 0.001 for all), and no differences were observed in VAS at rest, VAS with use, Hip Disability and Osteoarthritis Outcome Score Pain, or Forgotten Joint Score-12 between the groups ( P > 0.050 for all). Of note, no patient exhibited full-thickness preoperative gluteal tendon tearing with retraction on imaging.

Conclusion: Gluteal tears or tendinopathy was detected in 89.9% of patients undergoing direct anterior THA for OA. Despite no intraoperative repair, postoperative improvements in pain and function were similar to those of patients with no gluteal pathology. These findings suggest that although gluteal pathology may be common among patients undergoing THA, patients with partial thickness gluteal tears or tendinopathy generally do well following surgery.

Introduction: Clinical guidelines recommend low-molecular-weight heparin (enoxaparin) to prevent venous thromboembolism in orthopaedic trauma patients. However, a large trial recently found aspirin noninferior to enoxaparin in preventing death and pulmonary embolism in this population. We modeled cost implications for the United States healthcare system if aspirin replaced enoxaparin as the standard of care for thromboprophylaxis in orthopaedic trauma patients.

Methods: The modeling compared spending under two scenarios: continued use of enoxaparin versus switching to aspirin. The model included fracture incidence estimates from the National Inpatient Sample and dose and duration data from the clinical trial. We derived medication costs from current market prices across payer types and care settings (ie, inpatient and postdischarge prescriptions). The model incorporates uncertainty around each parameter based on calculated standard errors and generates bootstrapped estimates of costs and cost savings disaggregated by the payer.

Results: The results indicated that prescribing enoxaparin for thromboprophylaxis to more than 600,000 fracture patients costs $162.7 million annually, whereas thromboprophylaxis with aspirin would cost $1.6 million annually. Spending on thromboembolic events totals $210.7 million under the enoxaparin scenario and $222.1 million with aspirin. Overall, aspirin for thromboprophylaxis in fracture patients would yield annual savings of $149.7 million (95% credible interval: $97 to $208 million) compared with enoxaparin.

Conclusion: Our findings suggest that a widespread switch from enoxaparin thromboprophylaxis to aspirin would lead to more than $100 million in annual cost savings in the United States alone. Insurers stand to benefit most from this practice change. However, patients, especially those without insurance, would realize considerable savings from aspirin thromboprophylaxis.

Level of evidence: Level 1, Economic.

Introduction: Femoral neck fractures are highly morbid injuries, and patients with greater perioperative risk are commonly treated with hemiarthroplasty (HA). Neutrophil-lymphocyte ratios (NLRs) are measures of inflammation and predict mortality after surgery. We hypothesize that patients presenting with a femoral neck fracture and dysregulated inflammatory response treated with delayed hemiarthroplasty (HA) will have lower rates of inpatient mortality than those treated immediately.

Methods: The Premier Healthcare Database was retrospectively reviewed for older adult (age 60 and older) patients with femoral neck fractures who underwent HA. The marginal effect of 2-day versus 0-day delay in surgery on the probability of inpatient mortality was determined for each NLR value. A NLR value >6.9 was associated with a decreased risk of mortality if surgery was delayed by two days. Patients with an NLR >6.9 were identified, and those with a 2-day delay were 1:1 matched to those without a delay on the propensity for delayed surgery. The adjusted odds ratios (aORs) of inpatient mortality were determined through multivariable models accounting for potential confounding. Significance was defined as P < 0.05.

Results: A total of 2,106 patients with an admission NLR >6.9 two days before surgery were matched to 2,106 patients with an NLR >6.9 on the day of surgery. Matching achieved good balance (standardized mean difference of <0.10). A markedly lower rate of inpatient mortality was observed in the delay cohort (1.47% vs. 3.04%; aOR = 0.51 [95% CI, 0.31-0.82]).

Conclusions: Elevated preoperative NLR is associated with mortality risk in older adults undergoing early HA for femoral neck fracture. These findings suggest that the underlying risk profiles of patients presenting with hip fractures are not homogeneous; thus, patient-specific frameworks may be needed to guide optimal care.

Level of evidence: Level III.

Objective: To analyze the risk factors that affect the survival of patients undergoing vertebroplasty and construct a predictive nomogram.

Methods: Retrospective analysis of the survival status for patients age ≥50 years who underwent vertebroplasty in our hospital from January 2013 to August 2022. Demographic information, inpatient data, laboratory examination results, medication records, and other information were extracted from the clinical scientific research database of our hospital. Through proportional hazards assumption, univariate and subsequent multivariate COX regression, the independent risk factors that affect the survival prognosis of patients after vertebroplasty were summarized. A survival prediction nomogram based on these independent risk factors were constructed and validated.

Results: Three hundred fifty-nine patients were enrolled, 251 in the training set and 108 in the validation set. Multivariate COX regression showed that mean serum albumin (hazard ratio [HR] = 0.59565, 95% confidence interval [CI], 0.36160 to 0.9812), number of vertebroplasty (HR = 0.1978, 95% CI, 0.06529 to 0.2197), interval between the first two vertebroplasty procedures (HR = 0.05642, 95% CI, 0.02933 to 0.1085), and number of activating vitamin D prescriptions (HR = 0.34975, 95% CI, 0.19855 to 0.6161) were independent risk factors for the survival prognosis of patients after vertebroplasty. Based on these independent risk factors, a predictive nomogram was constructed. The area under the curve of the 5- and 8-year survival prediction models in the validation set was 0.889 and 0.760, respectively. The calibration curves of the nomogram in the training and validation sets were close to the ideal diagonal. The decision curve analysis showed that the predictive model exhibited good net benefit and predictive ability.

Conclusion: Mean serum albumin, number of vertebroplasty, interval between the first two vertebroplasty procedures, and number of activating vitamin D prescriptions were independent risk factors for the survival prognosis of patients after vertebroplasty. The predictive nomogram constructed based on these risk factors had a good predictive ability and certain potential for clinical decision making.

Targeted muscle reinnervation (TMR) and regenerative peripheral nerve interface (RPNI) are two novel microsurgical techniques that can improve prosthetic control and prevent and treat chronic limb pain following amputation. Both techniques use nerve transfer to reroute the neural input from a transected nerve to new muscle targets, thereby preventing neuroma formation and creating a new functional pathway between peripheral nerves and the brain. These techniques were originally developed to improve myoelectronic bioprosthetic control, but both TMR and RPNI have expanded in their indications to the prevention and treatment of symptomatic neuromas, thus improving quality of life and decreasing the narcotic burden in this vulnerable population. This review describes the principles of TMR and RPNI, their indications, the perioperative technique, and the postoperative management of patients undergoing these procedures.

Objectives: The optimal treatment of acetabulum fractures in elderly patients is unknown. The purpose of this study was to review outcomes of open reduction and internal fixation (ORIF) or acute total hip arthroplasty (aTHA) and to determine the age threshold based on treatment using a cost-effectiveness decision model.

Methods: The PubMed database was queried for clinical English language studies from 2002 to 2022 (N > 10), of acetabular fracture patients age >50 years treated with either ORIF or aTHA. Revision surgery and mortality rates were collected. Costs were obtained from the National Inpatient Sample database. Health state utilities were converted to quality-adjusted life years, and a Markov decision analysis model was constructed. Sensitivity analyses were done with regard to the quality of life and cost variables.

Results: Thirty studies met inclusion criteria, including 16 ORIF studies (N = 909) and 18 aTHA studies (N = 403). The ORIF cohort had a mean age of 71 years, follow-up of 3.5 years, mortality rate of 11.7%, and a conversion arthroplasty rate of 19.6%. The aTHA cohort had a mean age of 73 years, follow-up of 3.2 years, mortality rate of 10.7%, and a revision rate of 4.5%. Our model demonstrated that ORIF was a more cost-effective treatment for patients aged 67 years or younger and that aTHA was more cost-effective for patients aged 68 years and older. Sensitivity analyses demonstrated that this result was robust to small deviations in the cost of ORIF and aTHA but highly sensitive to functional outcome variables in the model.

Conclusion: A review of 30 studies demonstrated a conversion arthroplasty rate of 19.6% for patients older than 60 years compared with a revision rate of 4.5% for patients treated with aTHA. Without considering fracture pattern or patient factors, we found that aTHA is a more cost-effective treatment than ORIF for treatment of acetabulum fractures in patients aged 68 years and older.

Level of evidence: Economic Level III.

Background: Understanding the role of risk-taking personality and tolerance for treatment-related complications in patients with spine pathology may help tailor surgical recommendations. The aim of this study was to develop a predictive model that integrates standard clinical metrics with psychosocial factors, specifically examining whether patients with higher risk-taking tendencies are more likely to choose high-risk, high-reward surgeries.

Methods: This cross-sectional observational study recruited 1,214 participants from the United States in January 2024 using an online crowdsourcing platform. Participants completed an 84-question survey covering demographics, disability levels, and risk-taking tendencies. They were presented with hypothetical spinal surgery scenarios featuring varying risks of complications (footdrop, paralysis, or death) and chances of improvement. Participants rated their likelihood of choosing surgery on a six-point Likert scale. Predictors included demographics, socioeconomic factors, risk-taking personality (measured by the Domain-Specific Risk-Taking survey), and baseline pain levels (measured by the Oswestry Disability Index). The XGBoost model was used for predictive analysis.

Results: The final sample included 797 (386 male, 411 female) participants. The predictive model achieved an R-squared of 0.75, root mean squared error of 0.81, and mean absolute error of 0.61. Key predictors of the likelihood to opt for surgery included lower complication risk and higher improvement probability, followed by younger age, higher body mass index, and lower scores in Domain-Specific Risk-Taking survey's financial and recreational domains.

Conclusion: Incorporating psychosocial dimensions into predictive models enhances the personalization of surgical risk discussions. This approach ensures that treatment recommendations align with patient values and risk perceptions, enabling more patient-centered care in spine surgery.

Level of evidence: Level 3 (cross-sectional study).