Improving Arthroplasty Efficiency and Quality Through Concentrating Service Volume by Complexity: Surviving the Medicare Policy Changes.

We have an academic medical center (AMC), an associated community-based hospital (CBH) and several ambulatory care centers which are being prepared to provide same day discharge (SDD) total joint arthroplasty (TJA) and unicompartmental knee arthroplasty (UKA). The near-capacity AMC cared for medically and technically complicated TJA patients. The CBH wanted to increase volume, improve margins, and become a center of excellence with an efficient hospital outpatient department and SDD TJA experience. METHODS: We transitioned primary, uncomplicated TJA, UKA, and minimally invasive TJA to the CBH. Revision surgeries, patients with extensive comorbidities, and complex primaries were performed at the AMC. Protocols were developed to facilitate SDD UKA and total hip arthroplasty (THA) as well as rapid recovery protocols for total knee arthroplasty (TKA) at both hospitals. A protocol-based system was put in place to make both hospitals ready for the removal of TKA from the Inpatient-Only list to avoid Quality Improvement Organization and possible resultant Recovery Audit Contractor audits if referred after implementation. RESULTS: The CBH volume increased 36.7% (+239). AMC volume slightly decreased (-0.46%, -5) resulting in an increase in margin contribution for the system. CBH quality metrics (surgical site infections, length of stay, readmissions, and mortality) were improved. Surgeon satisfaction improved as their volume, efficiency, quality metrics, and finances were enhanced. Although CBH per case revenue was 80.3% and 74.4% of the AMC for THA and TKA, net margins were 3.6% and 18.8% higher for THA and TKA, respectively. Increased efficiency, lower hospital cost, and higher volume at the CBH allowed for an increase in revenue despite lower reimbursement per case. CONCLUSION: This strategy will help hospital systems improve net margins while improving patient care despite lower net revenue per TJA episode. These strategies will become increasingly important going forward with the transition of higher numbers of TJA patients to outpatient which will be subjected to further decreases in net revenue per patient.

Disparate effects of single endothelin-A and -B receptor blocker therapy on the progression of renal injury in advanced renovascular disease.

We hypothesized that chronic specific endothelin-A (ET-A) receptor blockade therapy would reverse renal dysfunction and injury in advanced experimental renovascular disease. To test this, unilateral renovascular disease was induced in 19 pigs, and after 6 weeks, single-kidney hemodynamics and function was quantified in vivo using computed tomography. All pigs with renovascular disease were divided such that seven were untreated, seven were treated with ET-A blockers, and five were treated with ET-B blockers. Four weeks later, all pigs were restudied in vivo, and then killed and ex vivo studies performed on the stenotic kidney to quantify microvascular density, remodeling, renal oxidative stress, inflammation, and fibrosis. Renal blood flow, glomerular filtration rate, and redox status were significantly improved in the stenotic kidney after ET-A but not ET-B blockade. Furthermore, only ET-A blockade therapy reversed renal microvascular rarefaction and diminished remodeling, which was accompanied by a marked decreased in renal inflammatory and fibrogenic activity. Thus, ET-A but not ET-B blockade ameliorated renal injury in pigs with advanced renovascular disease by stimulating microvascular proliferation and decreasing the progression of microvascular remodeling, renal inflammation, and fibrosis in the stenotic kidney. These effects were functionally consequential as ET-A blockade improved single kidney microvascular endothelial function, renal blood flow, and glomerular filtration rate, and decreased albuminuria.