Methods: From 9/2014-1/2015, high-touch surfaces were sampled in 12 inpatient units (7 ICU, 5 non-ICU) in 5 acute care hospitals. On each unit, 14 surfaces in each of 5 occupied patient rooms and the surface of 12 types of noncritical care equipment (as available) were sampled. The 3M Clean-Trace Clinical Hygiene Monitoring System was used to quantify surface ATP concentration as a measure of cleanliness. A surface was considered to pass the test of cleanliness if the result was <250 relative light units (RLUs). Room surfaces were assayed prior to daily cleaning and noncritical equipment was sampled randomly. Results were shared with unit leadership and nursing staff.
Results: 707 surfaces in patient rooms and 239 surfaces of noncritical care equipment were tested. Among surfaces in occupied rooms, pass rates ranged from 7-73%; the highest median RLU values were observed on bed rails, callbox/remotes, toilet flush handles, patient telephones, and visitor chairs. Among noncritical equipment that is used directly in patient care, pass rates ranged from 15-25%. The highest median RLU values were associated with portable ultrasounds, ECG machines, glucometers, blood pressure/thermometer carts, and patient ID scanners.
Conclusion: ATP luminescence technology demonstrated that most tested surfaces were contaminated with organic material. While surfaces in occupied patient rooms are expected to be contaminated, these data quantify the burden on various surfaces and highlight the importance of hand hygiene after environmental contact. Opportunities to improve cleaning of shared, noncritical patient care equipment were also identified. These findings are being used to develop a hospital-wide monitoring program, educational tools, and interventions to optimize environmental and equipment cleaning.
M. S. Simon, None
D. Eiras, None
W. Greendyke, None
L. Saiman, None
E. Y. Furuya, None
D. P. Calfee, None