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  • Title: Beta-blocker Use is Associated with a Reduction in Opioid Use 30 Days After Total Knee Arthroplasty.
    Author: Starr JB, Backonja M, Rozet I.
    Journal: Pain Physician; 2019 Sep; 22(5):E395-E406. PubMed ID: 31561649.
    Abstract:
    BACKGROUND: Total knee arthroplasty (TKA) can lead to chronic pain and prolonged postoperative opioid use. There are few evidence-based interventions to prevent these outcomes. Recently, beta-blockers have emerged as possible novel analgesics. OBJECTIVES: The objective of this study was to determine whether perioperative beta-blocker use is associated with reduced prolonged postoperative opioid use after TKA. STUDY DESIGN: This study used a retrospective cohort design. SETTING: The research took place within Department of Veterans Affairs hospitals in the United States between April 2012 and April 2016. METHODS: Patients: IRB approval was obtained to examine the records of Veterans Affairs (VA) patients undergoing TKA. Patients using opioids 60 days before surgery were excluded. INTERVENTION: The intervention being investigated was perioperative beta-blocker use, overall and by class. MEASUREMENT: Oral morphine equivalent usage through postoperative day 1 and prescription opioid refills through 30, 90, and 365 days after TKA were recorded. Adjusted models were created controlling for relevant demographic and comorbidity covariates. A secondary analysis examined the same outcomes separated by beta-blocker class. RESULTS: The cohort was 93.8% male with a mean age of 66 years. Among the 11,614 TKAs that comprised the cohort, 2,604 (22.4%) were performed on patients using beta-blockers. After adjustment, beta-blocker use was associated with reduced opioid use through 30 days after surgery (odds ratio [OR] 0.89 [95% confidence interval (CI), 0.80-0.99], P = .026). Selective beta-blockers were associated with reduced opioid use at 30 days (OR 0.88 [95% CI, 0.78-0.98], P = .021), and nonselective beta-blockers were associated with reduced oral morphine equivalent usage through postoperative day 1 (beta = -17.9 [95% CI, -29.9 to -5.8], P = .004). LIMITATIONS: Generalizability of these findings is uncertain, because this study was performed on a cohort of predominantly white, male VA patients. This study also measured opioid use, but opioid use is not a perfect surrogate for pain. Nevertheless, opioid use offers value as an objective measure of pain persistence in a national cohort for which patient-reported outcomes are otherwise unavailable. CONCLUSIONS: Perioperative beta-blocker use was associated with reduced prescription opioid use at 30 days after surgery. Both selective and nonselective beta-blockers were associated with reduced opioid use when analyzed individually. KEY WORDS: Analgesics, opioid, arthroplasty, replacement, knee, adrenergic beta-antagonists, pain management.
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