Highlights
- •Linear association between costs of infection control items and anesthesia units?
- •Prospective observational of 38 anesthetics, recording infection control supplies used
- •Associated anesthesia units (base+time) with supply costs, linear association
- •Examples show how to use to forecast annual anesthesia infection control supply costs
Background
Some costs for anesthesia supplies to reduce intraoperative infections depend on the
procedure and duration of the case. For regular anesthesia supplies and medications,
costs are linearly related to American Society of Anesthesiologists’ Relative Value
Guide units, known for nearly all cases in the United States of America. We hypothesized
linear association between costs of infection control items and anesthesia units.
Methods
A prospective observational study of 38 surgical cases was performed. Usage of anesthesia
infection control supplies was recorded: alcohol hand dispensers, microfiber cloths
for machine disinfection, and disinfecting and cleaning caps for syringe tips, Luer
connectors, and stopcocks. Cost per case was calculated using 2022 US dollar payments
for those items.
Results
Using least squares linear regression to associate the anesthesia units (base+time)
with supply costs, in addition to intercept and linear slope, none of five potential
extra non-linear terms were significant (all P ≥0.46). Further assessment showed lack
of fit to a quadratic model. Pearson linear correlation coefficient between cost and
units was 0.88. An example was created showing how to forecast annual infection control
supply costs for anesthesia based on the linear model.
Conclusions
For purposes of predicting intraoperative anesthesia supplies to reduce bacterial
transmission in the anesthesia workspace, a valid approach is to assume a linear association
with the total anesthesia units, a predictor generally known for all anesthetics.
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© 2022 Published by Elsevier Inc. on behalf of Association for Professionals in Infection Control and Epidemiology, Inc.
