When measuring output from a urinary drainage bag, what is the proper sequence?

• A. Open the drain and pour into a graduate to measure.
• B. Wipe the drain with an alcohol swab, then return the drain to the cover.
• C. Secure urinary drainage bag to bed frame; never hang on side rail or movable part.
• D. Place graduate at eye level and read the amount.

Answer: (D)

Accurate measurement of urinary output depends on reading from the measuring graduate with your eyes directly at the level of the liquid. When you view from above or below, the curved surface (the meniscus) can look higher or lower, leading to an inaccurate reading. To prevent this, place the graduate on a flat surface and align your eyes with the meniscus, then read at the bottom of the curve. This method keeps the measurement true to what actually flowed into the bag.

It’s also important to maintain the closed drainage system and not pour out the contents or open the drain, which would risk infection and alter the reading. Secure the bag to the bed frame to avoid tension on the tubing and potential leaks.