The Potential Value of Performing Preoperative Urinalysis Prior to Total Knee Arthroplasty

Daniel J. Johnson*, Logan M. Hansen, Haley E. Smith, Mark A. Oyer, David W. Manning

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Background: Although the practice of checking a urinalysis prior to elective total knee arthroplasty (TKA) is relatively common, very little has been reported on the association between a preoperative urinary tract infection (UTI) and adverse events in primary TKA. The goal of this study is to investigate the risk of postoperative complication following TKA as it relates to preoperative UTI. Methods: Patients undergoing TKA were queried in the National Surgical Quality Improvement Program. Morbid events were classified as minor (transfusion, pneumonia, wound dehiscence, UTI, and renal insufficiency) and serious (wound infection, thromboembolic event, renal failure, myocardial infarction, prolonged ventilation, unplanned intubation, sepsis, and death). Risk factors for adverse events were analyzed in both univariate and multivariate fashion. Results: A total of 203,851 patients undergoing TKA met inclusion criteria and 507 patients had a UTI present at time of surgery (UTI PATOS). A propensity matched analysis controlling for age, gender, body mass index, operative year, and American Society of Anesthesiologists score identified 507 patients without a UTI PATOS to serve as the control group. Following adjustment for baseline characteristics, operative year, and American Society of Anesthesiologists score, UTI PATOS was associated with increased risk for serious adverse events (odds ratio [OR] 2.746, 95% confidence interval [CI] 1.546-4.878, P = .0006), occurrence of any morbid event (OR 1.894, 95% CI 1.299-2.761, P = .0009), and reoperation (OR 4, 95% CI 2.592-6.169, P < .0001). Conclusion: This study suggests that a UTI present at time of TKA increases the risk of multiple postoperative complications and reoperation.

Original languageEnglish (US)
Pages (from-to)118-121
Number of pages4
JournalJournal of Arthroplasty
Issue number1
StatePublished - Jan 2021


  • clinical outcomes
  • perioperative medicine
  • periprosthetic joint infection
  • total knee arthroplasty
  • urinary tract infection

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine


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