Differences in Readmission Rates for Two TotalKnee Arthroplasty Prostheses

摘要

The readmission rates of cruciate-retaining (CR) and a posterior-stabilizing (PS) totalknee arthroplasty (TKA) have not been extensively evaluated. We aimed to determinethe following: (1) What are the readmission rates of TKA performed with the use of CRand PS prostheses at 30,60, and 90 days following discharge? (2) Were the causes of theunplanned readmission surgically or medically related? (3) What were the medicalcomorbidities associated with readmission? A prospectively collected database of 845TKAs (441 CR and 404 PS TKAs) at 22 institutions (24 surgeons) was reviewed.Outcomes evaluated included the incidence of readmission at 30, 60, and 90 daysafter discharge, medical/surgical cause, and medical comorbidities. There were nosignificant differences in readmission rates between the two cohorts at the differenttime points. There was a readmission rate of 2% at 30 days and 3.2% at 60 days for the CRgroup, and 2.2% at 30 days and 4.0% at 60 days for the PS group after discharge. Medicalcauses accounted for a majority of the readrnissions in both the CR and PS cohort.Readmitted patients had a higher incidence of increased body mass index, cardiovas-cular disorders, diabetes, and musculoskeletal disorders. The readmission rates for bothprostheses in the setting of primary TKA are encouraging because these rates are lowerthan previously reported outcomes. The authors believe that the positive midtermclinical performance of the prostheses used in this study may have contributed to thelower readmission rates.