Faculty Bibliography

The purpose of this study was to analyze the effect of hospital volume and charges on the rate of surgical site infections for total hip replacements (THRs) in New York State (NYS). In NYS, higher volume hospitals have higher charges after THR. The study team analyzed 93 620 hip replacements performed in NYS between 2008 and 2011. Hospital charges increased significantly from $43 713 in 2008 to $50 652 in 2011 (P < .01). Compared with lower volume hospitals, patients who underwent THR at the highest volume hospitals had significantly lower surgical site infection rates (P = .003) and higher total hospital charges (P < .0001). The study team found that in the highest volume hospitals, preventing one surgical site infection was associated with $1.6 million dollars in increased charges.

The routine use of amoxicillin antibiotic prophylaxis prior to dental procedures for patients with total joint prostheses in place remains controversial. This analysis shows that the practice may not be cost-effective for patients in whom the risk of infection with dental work is low. However, specific data quantifying the risk and the impact prophylactic antibiotics can have is needed. Patients and physicians will need to continue to consider their use on an individual basis and should consider the risk of infection as well as the risk of adverse drug reaction when making treatment decisions.

SUMMARY: The purpose of our pre-post intervention study was to reduce the number of near-miss events pertaining to wrong-site surgery, including incorrectly sided surgical bookings and incorrectly performed preoperative time-out procedures. Pre- and postintervention, incorrectly booked cases, and improperly performed presurgical time-out procedures were recorded. We then educated each surgeon and their staff regarding the importance of and proper way to perform these tasks. Subsequently, the monthly percentage of incorrectly booked surgical procedures and improperly performed time-outs were significantly decreased. INTRODUCTION: In 2004, the Joint Commission published comprehensive guidelines to prevent wrong-site surgery. Seven years have passed, and the incidence has not declined. The Joint Commission estimates that in the United States, wrong-site procedures including surgeries occur at least 40 times a week. "Near misses" are events that could have harmed a patient, but did not due to chance or mitigation. Improperly performed time-out procedures and inaccurate surgical bookings are considered near misses and could ultimately lead to "never events," such as wrong-site surgery. Near-miss analysis is a highly effective method of preventing rare, "never events." We hypothesize that proper education of surgeons and staff will be effective in reducing the number of near misses. METHODS: All cases analyzed were performed at an academic, orthopedic surgery specialty institution. From August 2010 to May 2011, near misses were identified and stored in Patient Safety Net (PSN), an electronic database. We tracked these cases and educated each offending attending physician and his or her staff about the importance of accurate surgical bookings. Additionally, we began an observational program to carefully review presurgical time-out procedures as they occurred. We tracked the percentage of these improperly performed time-outs and counseled offenders (attending surgeon, or any member of the operating room staff who made the error) regarding the deficiencies that caused the time-out to be ineffective. The number of near misses that occurred before and after the interventions were recorded and analyzed. RESULTS: Of the 12,215 cases included in this study, 6,126 cases formulated the "pre-education" cohort, while a total of 6,089 cases formulated the "post-education" cohort. In the first four months of the study, the monthly rate of incorrectly booked cases was 0.75%. Since the intervention, the rate decreased to 0.41% (p = .0139). The percentage of improperly performed time-out procedures decreased from 18.7% to 5.9% after the educational interventions were performed (p < .0001). CONCLUSION: A program designed to educate physicians to the importance of decreasing near misses for wrong-site surgery is effective. When analyzing the literature, it is clear that the reduction in near misses observed in this study decreases the likelihood of a wrong-site surgery.

INTRODUCTION: Performance of outpatient surgery at a standalone surgery center not physically associated with a tertiary care hospital may allow for streamlined surgical care of ambulatory patients. However such facilities are not equipped to handle many postoperative complications. Complications requiring transfer to hospital greatly increase the cost of surgical care. Interventions to minimize these transfers will become increasingly important in the settings of cost containment and episodic payment. METHODS: After IRB review and approval, we retrospectively reviewed the medical records of patients undergoing orthopedic surgery in our outpatient surgical center from March 2010 to February 2014. The data of patients who necessitated unplanned admission to our inpatient hospital were recorded in our outpatient surgery quality control database during that time period. An analysis of each case was done to determine the reason for transfer to admission status and actions taken by ambulatory surgery and hospital staff. Patient demographics, procedure characteristics, conditions necessitating transfer and interventions before and after transfer were analyzed. RESULTS: Over this four-year period, 37 of 15,471 (2.4/1000 incidence) patients were transferred to a hospital setting from our ambulatory surgery center. The average body mass index (BMI) of patients requiring transfer was 27. 1. Seventy-three percent of cases involved general anesthesia, with or without a regional block. Asthma and diabetes were the most common patient comorbidities (each present in 3 patients). Twenty-three percent of patients were assigned an American Society of Anesthesiologists (ASA) score of 1. Seventy-seven percent of patients transferred were ASA 2. No patients were ASA 3 or greater. Pulmonary (24%) and cardiac (24%) issues were the most common reason for transfer, followed by postoperative pain (13.5%). None of the medical issues causing admission were pre-existing conditions. CONCLUSIONS: Cardiac and pulmonary complications are the most common reason for transfer to hospital. Adequate pain control is a patient-centered outcome that may also reduce the incidence of transfer to hospital after ambulatory surgery. As the amount and complexity of surgery performed in out-patient settings increases, we must increase our understanding of the incidence and risk factors leading to unplanned admissions following these surgeries

BACKGROUND: Periprosthetic joint infections (PJIs) are associated with increased morbidity and cost. It would be important to identify any modifiable patient- and surgical-related factors that could be modified before surgery to decrease the risk of PJI. QUESTIONS/PURPOSES: We sought to identify and quantify the magnitude of modifiable risk factors for deep PJIs after primary hip arthroplasty. METHODS: A series of 3672 primary and 406 revision hip arthroplasties performed at a single specialty hospital over a 3-year period were reviewed. All deep PJIs were identified using the Centers for Disease Control and Prevention case definitions (ie, occurs within 30-90 days postoperatively, involves deep soft tissues of the incision, purulent drainage, dehiscence and fever, localized pain or tenderness). Univariate and multivariate analyses determined the association between patient and surgical risk factors and PJIs. For the elective patients, the procedure was performed on the day of admission ("same-day procedure"), whereas for the fracture and nonelective patients, the procedure was performed 1 or more days postadmission ("nonsame-day procedure"). Staphylococcus aureus colonization, tobacco use, and body mass index (BMI) were defined as patient-related modifiable risk factors. RESULTS: Forty-seven (1.3%) deep PJIs were identified. Infection developed in 20 of 363 hips of nonsame-day procedures and 27 of 3309 same-day procedures (p = 0.006). There were eight (2%) infections in the revision group. After controlling for confounding variables, our multivariate analysis showed that BMI >== 40 kg/m2 (odds ratio [OR], 4.13; 95% confidence interval [CI], 1.3-12.88; p = 0.01), operating time > 115 minutes (OR, 3.38; 95% CI, 1.23-9.28; p = 0.018), nonsame-day surgery (OR, 4.16; 95% CI, 1.44-12.02; p = 0.008), and revision surgery (OR, 4.23; 95% CI, 1.67-10.72; p < 0.001) are significant risk factors for PJIs. Tobacco use and S aureus colonization were additive risk factors when combined with other significant risk factors (OR, 12.76; 95% CI, 2.47-66.16; p = 0.017). CONCLUSIONS: Nonsame-day hip and revision arthroplasties have higher infection rates than same-day primary surgeries. These characteristics are not modifiable and should be categorized as a separate cohort for complication-reporting purposes. Potentially modifiable risk factors in our patient population include operating time, elevated BMI, tobacco use, and S aureus colonization. Modifying risk factors may decrease the incidence of PJIs. When reporting deep PJI rates, stratification into preventable versus nonpreventable infections may provide a better assessment of performance on an institutional and individual surgeon level. LEVEL OF EVIDENCE: Level IV, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.

We explored the average cost of 94,197 total knee and 78,541 total hip arthroplasties (TKA and THA) using the New York State Hospital Inpatient Cost Transparency database to evaluate the effect of beneficiary health status on hospital reported cost for the two operations. Using the 3M APR-DRG severity of illness index as a measure of patient's health status, we found a significant increase in cost for both TKA and THA for patients with higher severity of illness index. This study confirms the greater cost and variability of TKA and THA for patients with increased severity of illness and illustrates the inherent unpredictability in cost forecasting and budgeting for these same patients.

A thorough knowledge of the principles of antibiotic stewardship is a crucial part of high-quality orthopaedic surgical care. These principles include (1) determining appropriate indications for antibiotic administration, (2) choosing the correct antibiotic based on known or expected pathogens, (3) determining the correct dosage, and (4) determining the appropriate duration of treatment. Antibiotic stewardship programs have a multidisciplinary staff that can help guide antibiotic selection and dosage. These programs also perform active surveillance of antimicrobial use and may reduce Clostridium difficile and other drug-resistant bacterial infections by providing expert guidance on judicious antibiotic usage. The emergence of antibiotic-resistant pathogens, the geographical diversity of these infecting pathogens, and the changing patient population require customization of prophylactic regimens to reduce infectious complications. A multidisciplinary approach to antibiotic stewardship can lead to improved patient outcomes and cost-effective medical care.

INTRODUCTION: The purpose of this study was to determine whether development of a hospital-acquired condition (HAC) affected responses to Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) survey questions. HCAHPS is a national, standardized satisfaction survey. Patient responses form, in part, the basis for Medicare reimbursement to hospitals via the value-based purchasing system established by the Patient Protection and Affordable Care Act of 2010. We hypothesized that patients who developed an HAC would be less satisfied with their care. METHODS: We randomly distributed the HCAHPS survey, a validated, standardized measure of patient satisfaction, to 6,056 patients discharged from our institution for any orthopedic admission over a 2-year period. All patients who develop HACs are logged by our hospital quality assurance monitoring system. We reviewed the HCAHPS database, identified completed surveys associated with patients who had developed an HAC, and compared satisfaction scores between patients with HACs and patients without HACs. Survey scores were normalized to a 100-point scale. Univariate analysis was performed for two global ratings, and six specific satisfaction categories. Subgroup analysis was performed for surgical site infections (SSIs) and venous thromboembolic disease (VTE). RESULTS: A total of 2,876 controls and 159 HAC cases were identified from completed surveys. The cases and controls were similar in terms of race, however, the HAC group contained significantly more women (p < .001). Patients in the HAC group also were, on average, significantly older, with a mean age of 66.84 versus 58.65 (p < .001). There was no difference in satisfaction scores in patients' mean rating of communication by nurses (p = .81), communication by doctors (p = .31), communication about medications (p = .69), pain control (p = .66), the cleanliness of the hospital environment (p = .54), and the quietness of the hospital (p = .589). The mean normalized score for overall satisfaction was 93.99 (out of 100) for controls and 94.84 for HAC cases (p = .61). The mean normalized score for overall willingness to recommend the hospital to others was 90.22 for controls and 90.65 for HAC cases (p = .77). There was no statistically significant difference in satisfaction for patients with SSI versus VTE versus all other HACs (p > .05). DISCUSSION: Performance on HCAHPS is an area that demands hospital attention both to provide patient-centered care and to maximize revenue. Development of an HAC was not associated with decreased satisfaction scores in a population of orthopedic surgery patients at a private, university-affiliated specialty center. The lack of any statistically significant difference in patient satisfaction may be attributable to patient satisfaction with care in response to complications, the decreased sensitivity inherent to using a general satisfaction survey, or a homogeneity among orthopedic surgery patients and their expectations of care.

We used decision analysis to assess the cost profile associated with preoperative use of tranexamic acid (TXA) to prevent major bleeding complications associated with hip and knee arthroplasty surgery. We defined major bleeding complications as blood loss sufficient to require transfusion or surgical evacuation of a postoperative hematoma. In the absence of a reduction in revision rates, using current cost data, TXA use is not cost-saving for institutions with baseline blood transfusion rates under 25%. For centers with baseline transfusion rates above 25%, however, TXA becomes increasingly cost-saving as the reduction in transfusion rates seen with use of the drug increases, but a minimum 12% reduction in transfusion rates is needed, even if the expected baseline transfusion rate is 100%. Nevertheless, TXA use is much more likely to be cost-saving, regardless of transfusion rates, if it leads to a reduction in need for revision surgery.