The 21 Day Rule is an event reporting rule that reduces reporting of events that are likely to be related to the same patient problem. Per the 21 Day Rule, 21 or more days must exist between two dialysis events of the same type for the second occurrence to be reported as a separate dialysis event.

Read the attached files to learn more about the basics of the 21 day rule and why it is an essential part of reporting dialysis events in NHSN.

And for the instructions to running and interpreting the 21 Day Rule Report in NHSN, click on the below link.

How to Run and Interpret the 21 Day Rule Report in NHSN