Perioperative complications of legally blind patients undergoing total knee arthroplasty: A national inpatient sample database study

Introduction: Vision impairment is a significant health concern that leads to increased morbidity and mortality globally. Significantly, legally blind (LB) patients have higher rates of hospitalization, cost, and orthopedic-related complications. Total knee arthroplasty (TKA) is commonly used to treat advanced knee osteoarthritis. However, there is limited literature reporting the demographic and hospitalization characteristics and operative outcomes of patients with LB who underwent TKA. This study addresses this gap in literature. Method: We conducted a retrospective study using a Nationwide Inpatient Sample database. We assessed perioperative complications, length of stay (LOS), and healthcare expenditure among legally blind and control cohort patients who underwent TKA. Propensity matching was conducted to identify factors associated with perioperative complications. Results: Between 2016 and 2020, there were 558,371 patients underwent TKA, with 0.1% of patients documented as legally blind. Of this cohort, the average age was significantly older than the control, 70.01 years versus 66.72 years (p < 0.001), respectively. Patients from the LB cohort had a longer length of stay (2.9 ± 1.7 days) than those from the control cohort (2.4 ± 1.3 days) (p < 0.001). Significantly, patients in the legally blind group incurred higher expenditures than those in the control group ($68,936 versus $64,808, respectively; p < 0.001). (Table 2). Propensity matching yields similar results. Analysis of TKA-associated operative complications suggested that legally blind patients had a higher proportion of blood loss anemia (20.97%, p < 0.05), required blood transfusions secondary to surgery (3.1%, p < 0.05), and periprosthetic fractures (2.6%, p < 0.05) than the control group (15.3%, 1.5%, and 0.42%, respectively). Conclusion: We report that LB patients are, on average, older and have an extended LOS, higher expenditure, and higher rates of specific TKA-associated operative complications than those without legal blindness. To date, this is the first study of its kind to provide large, population-based data on the demographics, costs, and TKA-operative complications in patients with LB and, as such, provides a purposeful basis for future research.