• Jon Raso, Pramod N Kamalapathy, Varun Puvanesarajah, Lawal Labaran, and Hamid Hassanzadeh.
• Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia, USA.
• World Neurosurg. 2022 Jun 1; 162: e91-e98.

ObjectiveTo determine if a penicillin allergy is an independent risk factor for poor outcomes after anterior cervical discectomy and fusion (ACDF) and posterior lumbar fusion (PLF).MethodsA retrospective database review was performed using the PearlDiver data set. The study population included all patients younger than 85 years who underwent elective PLF or ACDF with diagnosis of penicillin allergy using International Classification of Diseases codes. Study patients were compared with controls for 90-day complications and 1-year reoperation rates. A multivariate logistic regression was used to determine the independent effect of penicillin allergy on the postoperative outcomes.ResultsPLF cohort multivariate analysis showed that patients with a penicillin allergy had a significantly increased risk of sepsis (2.6% vs. 2.0%; P = 0.020), urinary tract infection (10.8% vs. 8.4%; P < 0.001), emergency room visits (27.3% vs. 20.2%; P < 0.001), and readmissions (9.6% vs. 6.4%; P < 0.001) within 90 days index of surgery. Similarly, the ACDF cohort multivariate analysis showed that a penicillin allergy was associated with an increased risk of sepsis (1.8% vs. 1.1%; P < 0.001), emergency room visits (27.2% vs. 20.7%; P < 0.001), and readmissions (6.8% vs. 5.6%; P = 0.003) within 90 days index of surgery.ConclusionsThe present study found that a reported penicillin allergy is associated with an increase in sepsis, urinary tract infection, emergency room visit, and readmission postoperatively within 90 days after PLF and ACDF. The findings can help physicians provide patients with more comprehensive preoperative counseling in the setting of patient-reported penicillin allergy.Copyright © 2022. Published by Elsevier Inc.

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