Paynter JW, Raley JA, Kyrkos JG, et al. - The present study was conducted to evaluate the usefulness of routine postoperative laboratory studies in reverse shoulder arthroplasty (RSA). Researchers retrospectively examined the electronic medical records of 369 patients who had undergone RSA over 10 years. A total of 213 patients were included for analysis. Intervention related to abnormal laboratory values, length-of-stay, and 90-day emergency room visits/readmissions were the primary outcomes. They conducted multivariate logistic regression analysis to distinguish risk factors correlated with abnormal laboratory values and postoperative visits/readmissions. They recommend against routine testing for primary RSA, since 87.3% of laboratory studies did not affect patient management. Data reveal the practice of obtaining routine postoperative laboratory studies is not verified. Selectively obtaining a postoperative basic metabolic profile was recommended in patients with increased American Society of Anesthesiologists (ASA) classification and/or charlson comorbidity index with a lower BMI. Selectively ordering postoperative complete blood count was also recommended in patients with a lower preoperative Hgb.