Chlorhexidine Gluconate/Isopropyl Alcohol

Periprosthetic joint infections occur in 1%-4% of primary total shoulder arthroplasties (TSAs). Cutibacterium acnes is the most commonly implicated organism and has been shown to persist in the dermis despite use of preoperative antibiotics and standard skin preparations. Studies have shown decreased rates of cultures positive for C acnes with use of preoperative benzoyl peroxide or hydrogen peroxide (H₂O₂), but even with this positive deep cultures remain common. We sought to determine whether an additional application of H₂O₂ directly to the dermis following skin incision would further decrease deep culture positivity rates.

We performed a randomized controlled trial comparing tissue culture results in primary TSA in patients who received a standard skin preparation with H₂O₂, ethanol, and ChloraPrep (CareFusion, Leawood, KS, USA) vs. an additional application of H₂O₂ to the dermis immediately after skin incision. Given the sexual dimorphism seen in the shoulder microbiome regarding C acnes colonization rates, only male patients were included. Bivariable and multivariable analyses were performed to compare rates of positive cultures based on demographic and surgical factors.

Dermal cultures were found to be positive for C acnes at similar rates between the experimental and control cohorts for the initial (22% vs. 28%, P = .600) and final (61% vs. 50%, P > .999) dermal swabs. On bivariable analysis, the rate of positive deep cultures for C acnes was lower in the experimental group, but this difference was not statistically significant (28% vs. 44%, P = .130). However, patients who underwent anatomic TSA were found to have a significantly greater rate of deep cultures positive for C acnes (57% vs. 28%, P = .048); when controlling for this on multivariable analysis, the experimental cohort was found to be associated with significantly lower odds of having positive deep cultures (odds ratio, 0.37 [95% confidence interval, 0.16-0.90], P = .023). There were no wound complications in either cohort.

An additional H₂O₂ application directly to the dermis following skin incision resulted in a small but statistically significant decrease in the odds of having deep cultures positive for C acnes without any obvious adverse effects on wound healing. Given its cost-effectiveness, use of a post-incisional dermal decontamination protocol may be considered as an adjuvant to preoperative use of benzoyl peroxide or H₂O₂ to decrease C acnes contamination.

To reduce average surgical‐site infection (SSI) rates to less than 7.5%, as well as other complications by incrementally implementing an SSI prevention care bundle in maternity: (1) ChloraPrep; (2) PICO dressings, performing elective cesarean sections in a main theater rather than a labor ward and warming blankets; (3) vaginal cleansing; and (4) Hibiscrub.

In this prospective cohort study, the association between categorical variables was assessed by χ2 tests, temporal trends in the monthly percentage change of SSI were measured using the Joinpoint Regression Program v4.7.0.0.

In all, 1682 women (mean age 33.1 ± 5.2 years) underwent either elective (53.9%) or emergency (46.1%) cesarean section. After a small initial increase (10.0%–11.8%), SSI progressively declined to 4.4% (χ2 = 22.1, P < 0.001), as did sepsis, reoperation or readmission for SSI: from 12.5% to 0.5% (χ2 = 90.1, P < 0.001). The rates of SSI fell progressively with the cumulative introduction care bundle components. The average monthly percentage change was −14.0% (95% confidence interval −21.8% to −5.4%, P = 0.004), and the average SSI rate was kept below 7.5% for the last 12 months of the study.

The maternal SSI prevention care bundle is simple and inexpensive; it effectively reduces SSI after a cesarean section and should be offered routinely to women undergoing cesarean section.