{
  "abstract": "Background and Aims A previous analysis from our group suggested that the use of peripheral nerve blocks may decrease hip and knee osteoarthritis outcome scores (HOOS/KOOS) among outpatient (Methods Institutional review board (IRB) approval was obtained from the Mayo Clinic IRB. A retrospective review of 338 TKA patients was performed, including 202 patients who received an ACB. All patients received periarticular injections and multimodal analgesia. Intraoperative and post-anesthesia care unit (PACU) narcotic usage (oral morphine milligram equivalents, OME), numerical pain scores, first ambulation distance, length-of-stay (LOS), 90-day complications (readmissions or reoperations) and KOOS scores were compared. Pearson Chi-Square and Fisher’s Exact tests evaluated categorical variables and Wilcoxon-Mann-Whitney tests evaluated continuous variables.Results There were no significant differences in baseline values between the two groups. The mean patient age was 64.6 years, 54.1% were male, 89.1% were Caucasian, mean body mass index was 32.8 kg/mg2 and 91.1% of patients had a spinal anesthetic. Mean KOOS scores were not different for ACB patients compared to non-block patients (71.7 vs 64.0, respectively, p=0.0743). ACBs resulted in no significant differences in postoperative OME or pain scores. Additionally, PNB resulted in no difference in LOS (10.3 vs 11.2 hrs, p=0.1544), mean ambulation distance (147.5 vs 146.9 feet, p=0.9699) or 90-day complications.Conclusions Our results suggest that, within the context of a multimodal analgesia outpatient protocol, the use of ACB is not associated with an improvement in KOOS scores, 90-day complications or immediate postoperative outcome improvement. Among low-risk patients who qualify for an outpatient pathway with a multimodal analgesia protocol, the use of ACB may not influence postoperative functional and other outcomes.Abstract EP043 Table 1Outcome data of 398 patients who underwent outpatient total knee arthroplasty (TKA). HOOS = Hip Injury and Osteoarthritis Outcome Score; KOOS = Knee Injury and Osteoarthritis Outcome Score. BMI = body mass index. SD = standard deviation. IQR = interquartile rangeAbstract EP043 Table 2Baseline data of 398 patients who underwent outpatient total knee arthroplasty (TKA). HOOS = Hip Injury and Osteoarthritis Outcome Score; KOOS = Knee Injury and Osteoarthritis Outcome Score. BMI = body mass index. SD = standard deviation. IQR = interquartile range",
  "authors": [
    {
      "affiliations": [
        "Anesthesiology, Mayo Clinic, Jacksonville, USA"
      ],
      "name": "Alberto Ardon"
    },
    {
      "affiliations": [
        "Anesthesiology, Mayo Clinic, Jacksonville, USA"
      ],
      "name": "Ahmad Oseili"
    },
    {
      "affiliations": [
        "Anesthesiology, Mayo Clinic, Jacksonville, USA"
      ],
      "name": "Raji Naamani"
    },
    {
      "affiliations": [
        "Anesthesiology, Mayo Clinic, Jacksonville, USA"
      ],
      "name": "Sumayya Aboobacker"
    },
    {
      "affiliations": [
        "Orthopedics, Mayo Clinic, Jacksonville, USA"
      ],
      "name": "Clayton Wing"
    },
    {
      "affiliations": [
        "Statistics, Mayo Clinic, Jacksonville, USA"
      ],
      "name": "Dan Ubl"
    },
    {
      "affiliations": [
        "Orthopedics, Mayo Clinic, Jacksonville, USA"
      ],
      "name": "Bryan Springer"
    },
    {
      "affiliations": [
        "Orthopedics, Mayo Clinic, Jacksonville, USA"
      ],
      "name": "Cameron Ledford"
    }
  ],
  "title": "EP043 Does the use of adductor canal blocks really affect knee osteoarthritis outcome scores among outpatient total knee arthroplasty patients?",
  "uid": "64ca099b-4496-5668-9e15-7e5ab104f645"
}