An infection in a patient with a device (e.g., ventilator or central line) that was used within the 48-hour period before the onset of infection is called a device-associated infection.

For catheter-associated UTI, an indwelling urinary catheter must have been in place within 7 days before positive laboratory results or signs and symptoms meeting criteria for UTI were evident.

The total number of days if exposure to the device (central line, ventilator, or urinary catheter) by all of the patients in the selected population during the selected time period. (One or more central lines in a patient are to be taken as one)

Device associated infection rates are expressed per 1000 device-days

VAP

Number of ventilator-associated pneumonia x 1000

Number of ventilator days

CLABSI

Number of central line-associated BSIs x1000

Number of central-line days

CAUTI

Number of urinary catheter-associated UTIs x1000

Number of urinary catheter-days

SSI

Number of Surgical Site Infections x 100

Total No. of Surgeries

These infection rates are calculated on a monthly basis and informed to the Infection Control Committee members during the meeting, through whom it is percolated to the concerned areas such as Operating Room, ICU, Nursing staff, etc.