ممرض يعلّم مريضة جمع عينة بول نظيفة لمزرعة. أي خطوة صحيحة؟

A nurse teaches a client to collect a clean-catch urine specimen for culture. Which step is correct?

1. Collect the first morning urine from the very start
2. Take the sample from an old full catheter bag
3. Leave the sample on the table for hours before sending
4. Clean the area, then collect the sample midstream

Answer: D) Clean the area, then collect the sample midstream. A midstream sample after cleansing reduces contamination; send within an hour or refrigerate. From a catheter, use the sampling port, not the bag.