Corticosteroid Injection in the Operative Hand Prior to a Trigger Finger or Carpal Tunnel Release: If It Is Not at the Surgical Site Then What Is the Big Deal?

Background: Patients who have had a corticosteroid injection at the surgical site within 90 days of trigger finger release (TFR) or carpal tunnel release (CTR) have an elevated risk of postoperative infection. Currently, it remains unknown if a preoperative injection in proximity to the surgical site for a separate complaint alters the risk of a postoperative infection.Methods: A retrospective chart review was performed on all patients who underwent TFR or CTR between 2010 and 2022. Patients who had a corticosteroid injection at or near the surgical site within 90 days of surgery were included. Outcome measures included uncomplicated healing, superficial infection requiring antibiotics, and deep infection (DI) requiring surgical debridement.Results: There were 564 cases in which a corticosteroid injection was performed within 90 days of TFR or CTR. Superficial infections occurred in 12 (2.1%), and DIs occurred in 6 (1.1%) cases. There was no significant difference in infection rates between the two groups relative to the location of the injection nor timing of the injection (0-30, 31-60, or 61-90 days prior to surgery).Conclusions: Patients who had an injection at the surgical site within 90 days of TFR or CTR had an elevated rate of postoperative infection compared with published rates in the literature. This study is unique in that preoperative injections at an adjacent site in the palm also correlated with an elevated rate of infection, similar to patients who had an injection at the surgical site.Level of Evidence: Level 4.